84 results about "Flue gas" patented technology

The invention relates to a preparation method of a PLA strand filtering rod capable of lowering flue-gas temperature and reducing suction resistance. The preparation method includes the steps of preparing a phase-change material mixture, preparing phase-change materials containing fragrant substances, preparing a fragrant filtering rod body capable of slowly releasing fragrance and the like. By increasing the addition quantity of the phase-change materials for combination with the PLA strand filtering rod body capable of reducing suction resistance and conducting triple cooling, the overall smoking taste of cigarettes and heating non-burning cigarettes is improved, and meanwhile, the flue-gas temperature is also lowered; smoking comfort is improved for customers, the process flows are simple, and the preparation method is suitable for industrial production.

The invention discloses a check fire valve for a flue, comprising a lampblack channel comprising an outer casing. The lampblack channel is provided with an air inlet and an air outlet which are opposite to each other; two oppositely arranged valve plates are arranged in the lampblack channel; and are rotatablely arranged in the lampblack channel through a valve plate rotation shaft; a blocking body causing the two valve plates only to be opened towards the direction of the air outlet is arranged at one end near the air inlet in the lampblack channel; a connecting strip lengthways arranged to separate the air inlet to two parts is arranged at the side near the air inlet in the lampblack channel; the valve plate rotation shaft is arranged close to the connecting strip; and the side face of the connecting strip facing to the air outlet is provided with a high-temperature closing device which can enable the valve plates to be forcibly closed. The invention has good lampblack removing effect, can not impede the smoothness of public flues, and can be forcibly closed when temperature of flue gas in the public flues is in a high exigent condition.

The invention provides a sludge-based adsorbent used for desulfurization and demercuration of flue-gas and a preparation method thereof. The sludge-based adsorbent employs municipal sludge and/or papermaking sludge as a raw material. The preparation method comprises the following steps: adding an activator and a physical conditioning agent into sludge slurry and carrying out mixing under stirring and mechanical dehydration; carrying out grinding and screening after drying; and carrying out physical activation after pyrolysis in an inert atmosphere so as to prepare the sludge-based adsorbent. According to the invention, the sludge slurry is used as a raw material, and uniformity of the activator and the physical conditioning agent is improved by using a wet method and the means of mixing; the activator and the physical conditioning agent can reduce repulsive interaction and hydrophilic interaction among electronegative sludge particles, and a porous lattice structure with a hard texture and good permeability is formed in a sludge cake obtained after pressure filtration and dehydration; the prepared adsorbent can be used for desulfurization and demercuration of flue-gas; and the preparation method has the advantages of simple procedures, easily controllable conditions, capacity of realizing harmony and unity of sludge treatment and resource utilization and good economic benefits, environmental benefits and social benefits.

The invention relates to a method for producing energy-saving sintered bricks from mud. The sintered brick is made from river mud, municipal sludge and sea mud as raw material, by mixing with silica-based inorganic binder at a certain proportion, ageing, extruding with a extrusion molding machine to obtain blanks, cutting the blanks with a cutter, drying, sintering and burning. The invention makes full use of mud and the additional amount of mud is high up to 50%. The invention realizes energy and resource conservation and helps develop the circular economy and realize the comprehensive utilization of resources. The produced energy-saving sintered brick has the advantages of high porosity and good heat-insulation effect. During the sintering process, the flue gas is circularly treated, the exhaust gas is treated with acidic and alkaline solutions to remove harmful substances (such as dioxin) from the exhaust gas, and harmful substances such as heavy metals are solidified, therefore, the whole production process and the final product do not cause environmental pollution or hazard.

The invention discloses a zoning oxidation ozone distributor, and an arrangement mode and applications thereof. The zoning oxidation ozone distributor comprises an ozone distributor main body and ozone convey pipelines; the ozone distributor main body is longitudinally divided into a plurality of distribution zones by separating plates; a group of ozone convey pipelines is arranged in each distribution zone; and the ozone convey pipelines are arranged on one end of the ozone distributor main body. The zoning oxidation ozone distributor comprises a plurality of oxidation zones, ozone local excess supply is realized at conditions that the total ratio of ozone to NOx is relatively low, orientation increasing of the ratio of easily absorbable N2O5 in oxidation products is achieved, and flue gas denitration efficiency is increased; and in addition, flue gas in the distribution zones is mixed to eliminate local unreacted ozone; the zoning oxidation ozone distributor is simple in design, andhigh in operationality, is capable of reducing denitration technology cost effectively, is obvious in engineering advantages, and is suitable for wide applications in the field of oxidation-absorptiondenitration technology.

The invention discloses a failure prediction method based on ICA reconstruction, which includes the following steps: step 1, calculating a separative matrix W; step 2, calculating the statistic value I<2>(k), SPE(k) or I<2>e(k) of the real-time data Xnew(k) through adopting the formulas I<2>(k)=S'newd(k)<T> S'newd(k), I<2>e=S'newe(k)<T>*S'newe(k), SPE(k)=(xnew(k)-x'new(k))<T>*(xnew(k)-x'new(k)), S'newd(k)=Wd*xnew(k), and S'newe(k)=We*xnew(k), wherein Wd refers to the matrix formed by the lines expect the first d lines of the separative matrix W, We refers to the matrix formed by the lines except the first d lines of the separative matrix W, and X'new(k)=Q<-1>BdWd*xnew(k), Bd=(WdQ<-1>)<T>, Be=(WeQ<-1>)<T>, and Q refers to a whitening matrix; and step 3, calculating the nuclear density of I<2>(k), SPE(k) or I<2>e(k), and detecting failures as per the control limit. The method provided by the invention solves the problem that the traditional flue gas turbine prediction method can not utilize the multidimensional valid data, takes the multi-channel vibration data into consideration, can be used for directly predicating failures, and improves the prediction accuracy compared with the PCA reconstruction method.

The invention relates to a method for synchronously removing sulfur dioxide and fine particles in smoke through electrical charge and mist spray. The method performs pre-charge (positive charge) for absorption liquid through an external electrical charge spray gun, and uses compression molding air for spraying the absorption liquid input in the spray gun into a desulfurization tower in a mist manner; the mist drops of the absorption liquid with the positive charge are reacted with the sulfur dioxide in the smoke; and the fine particles in the smoke are captured through an electrical charge coagulation effect. The large drops in the desulfurization tower directly drop to the bottom of an absorption tower; the small drops are captured when entering a demisting device along with the smoke, and flow to the bottom of the desulfurization tower along the tower wall; and finally, the absorption liquid can be recycled after the regeneration treatment. The synchronous and efficiency removal of the sulfur dioxide and the fine particles in coal-fired flue gas can be realized through the method. Compared with the prior art, the method has such characteristics as high efficiency and low energy consumption.

The invention belongs to the technical field of waste head and complementary energy recovery in iron and steel Industry, and in particular relates to a method for preparing methanol by sensible heat of blast furnace slag. The method comprises the following steps: blast furnace slag enters into a sensible heat recovery device; reactants enter into a grain slag packed bed to be preheated, and enter into a graining reactor when the temperature reaches 600 DEG C; the reactants enter into the graining reactor for reaction at 850 DEG C and at one barometric pressure to generate methanol. High temperature residual heat resources of liquid blast furnace slag are efficiently, economically and environment-friendlily used in an energy-saving manner. Treated blast furnace slag can meet the demand of cement manufacturing, and methanol produced belongs to a product widely applied with high additional value. Ternary reforming reaction of methane can realize part of self-heat supply, so that the energy efficiency in the reaction process is greatly enhanced, the cost is lowered, and carbon deposited on the surface of the catalyst can be alleviated or even eliminated. Coke oven gas resource is adequately utilized, the energy resource is saved, carbon dioxide in flue gas is utilized, and emission of greenhouse gases is reduced, so that the method is energy-saving and environment-friendly.

The invention provides a heat storage type converter waste heat recovery method and device. During a steel-making period of a converter, flue gas is preliminarily cooled through a flue and passes an overheating chamber and a waste heat furnace in turn for waste heat recovery step by step, and an overheating steam product is generated. The cooled flue gas enters a coal gas collection chamber through a deduster and is recovered. At this time, heat storage materials in a vaporized flue, a heat exchange tube set, the waste heat furnace and the deduster store heat. During a non-steel-making period, the heat storage materials in the waste heat furnace and the heat exchange tube set continue to release heat and generate steam so as to realize continuous supply. At the same time, because the heat storage materials release heat, the temperature of each device won't greatly decrease, the device is prevented from fatigue failure due to frequent large temperature difference, and the safety is increased and the service life is prolonged. The heat storage type converter waste heat recovery method and device solve the problems of low waste heat utilization, large energy consumption and high operation cost in a converter waste heat recovery system at present, prolong the service life of each device while meeting the waste heat gradient utilization of the converter, improve the heat energy utilization rate, reduce the operation and maintenance cost, and are suitable for large-scale popularization and usage.

The present invention relates to a low SO ₂ /SO ₃ SCR denitrification system with high conversion rate, a heat exchanger is installed between the first layer catalyst and the second layer catalyst of the SCR reactor, the heat exchange through the heat exchanger can reduce the temperature of the flue gas entering the second layer catalyst, and the heat exchanger inlet has flow The regulating valve can control the flow of cooling medium. The invention can greatly reduce the conversion rate of SO2/SO3 when the unit is in normal operation without affecting the denitrification effect, thereby effectively reducing the problem of ABS deposition in the power plant.

The invention relates to a method for controlling pollutant discharge, and aims to provide a method for controlling dioxin discharge in flue gas by using sulfurous iron ore in the process of burning and processing solid wastes. The method comprises the following steps: throwing the sulfurous iron ore and trash to an incinerator, and controlling the added quantity, and keeping the concentration of sulfuric dioxide in the flue gas at an outlet of the incinerator to between 200 and 400mg/Nm. The dioxin restraining method has a simple process, does not need to change the incinerator and a flue gas processing system, has remarkable effect on dioxin restraining, and simultaneously can reduce the dioxin discharge in the flue gas and fly ash. The adopted sulfurous iron ore has low price and wide resources. In addition, the method has significant application value to solving the problem of the dioxin discharge in the process of burning wastes.

The invention discloses a radial heat tube-ordinary heat exchange tube combined type waste heat recovery device for flue tail gases. The waste heat recovery device comprises a gas box body and a heat exchange device which is arranged inside the gas box body. The waste heat recovery device is characterized in that side plates of the gas box body are tube plates, through-holes are formed in the tube plates, a flue gas inlet and a flue gas outlet are arranged at two ends of the gas box body respectively, a steam-water separator is arranged on the upper portion of the box body, the heat exchange device is composed of a preheating heat exchange tube group and evaporating heat exchange tube groups, the preheating heat exchange tube group is composed of a radial heat tube and a water inlet header and a water outlet header I which are connected with the radial heat tube, and the evaporating heat exchange tube groups are composed of ordinary heat exchange tubes, water inlet headers II and steam outlet boxes. The waste heat recovery device has the advantages that the combined type waste heat recovery device in the structure is used in flue gas discharging, heat of flue exhaust gases is transferred to soft water through heat transfer by the radial heat tube, and steam is produced, so that the exhaust gas temperature of the flue tail gases is reduced, the heat utilization ratio is improved, and the dew point corrosion can be effectively avoided.

The invention relates to the field of environmental protection equipment, specifically relates to flue gas white smoke removal equipment for an intelligent production factory of a rubber plant. The equipment has a chimney tube; an air inlet ring is inserted into the bottom of the chimney tube; a plurality of groups of air inlet pipes are uniformly welded on the air inlet ring at equal intervals; adriving motor is arranged in the center of the bottom of the chimney tube; a dustproof sleeve is arranged outside the driving motor in a sleeving manner; a connecting shaft sleeve sleeves a rotatingshaft at the top of the driving motor; a threaded rod is inserted into the top of the connecting shaft sleeve, a waste liquid ring is attached to the bottom of the inner wall face of the chimney tube,a collecting funnel is welded to the edge of the inner side of the upper surface of the waste liquid ring, the threaded rod is sleeved with a rotating sleeve, and four sets of cleaning blades are evenly welded to the side face of the rotating sleeve at equal intervals in a surrounding mode. According to the equipment, cleaning rollers are attached to the inner wall face of the chimney tube to roll through elastic force of compression springs, and sundries attached to the inner wall face of the chimney tube are cleaned through rotation of the cleaning rollers.

The invention relates to a boiler waste heat recovery device, which comprises a boiler return water tank and a heat absorption tank installed on a flue. Among them, the heat absorbing tank is provided with a flue gas channel extending from the bottom of the heat absorbing tank to the top of the heat absorbing tank, a plurality of heat absorbing steel pipes are arranged inside the heat absorbing tank, and water inlets and outlets are provided on the outer wall of the heat absorbing tank. The water inlet and the water outlet are respectively connected to the boiler return water tank through pipes. The invention realizes secondary recovery and reuse of boiler waste heat, greatly increases boiler inlet water temperature, achieves the goals of coal saving, energy saving and environmental protection, and reduces cost while improving boiler thermal efficiency.

The invention discloses a dual-layer mechanical grate type garbage gasifying incinerator and a dual-boiler power generation system thereof. The dual-layer mechanical grate type garbage gasifying incinerator comprises a dual-layer garbage gasifying incinerator, a boiler system and a circulating air supply system, wherein the dual-layer garbage gasifying incinerator comprises a feeding hopper, a gasification furnace and a burnout furnace; the burnout furnace is positioned directly under the gasification furnace; the feeding direction of the burnout furnace is opposite to the feeding direction of the gasification furnace, and flue gas outlets are formed in the upper end of the gasification furnace and the upper end of the burnout furnace; the boiler system comprises a boiler body a, and a boiler body b, wherein the boiler body a is provided with a cyclone-combustion chamber, a furnace chamber a, and a furnace chamber b; a flue gas inlet of the cyclone-combustion chamber is connected with a flue gas outlet of the gasification furnace; the boiler body b is provided with evaporators b, superheaters b, and water-cooled walls b, which are arranged on a flue gas pipeline in a sleeving manner, wherein the superheaters are arranged in the furnace chamber a, the evaporators are arranged in the furnace chamber b, and the superheaters and the evaporators are arranged in a furnace chamber d; steam drums are arranged at the top ends of the two boiler bodies.

The invention relates to the technical field of environmental protection, specifically to a special preparation device for a boiler flue gas desulfurization tower repairing agent. The special preparation device for the boiler flue gas desulfurization tower repairing agent is characterized by comprising a closed type circulation low-oxygen boiler tail gas mixing tower system, an A component preparation system, a B component preparation system, a double spiral agitator and a supporting frame assembly. The closed type circulation low-oxygen boiler tail gas mixing tower system comprises a closed type circulation low-oxygen boiler tail gas mixing tower, a multicyclone, a Roots blower assembly, a circulating fluidized bed boiler fly ash spiral conveyor, a connecting air pipe assembly and a circulation low-oxygen boiler tail gas supplement port. The closed type circulation low-oxygen boiler tail gas mixing tower system adopts tail gas from a boiler flue gas dust remover as a medium for conveying circulating fluidized bed boiler fly ash, and has the characteristics of low oxygen, dryness and cleanness, the activity of SiO2 particles of the circulating fluidized bed boiler fly ash can be maintained, and the boiler tail gas is used as the gas medium to complete the technological processes of conveying, mixing and separating, so that waste is turned into wealth substantially, and high-value utilization of the boiler tail gas is realized.

The invention relates to a desulfurization wastewater zero discharging system and method based on waste heat reuse under a low-load working condition. The desulfurization wastewater zero discharging system comprises an economizer flue gas bypass subsystem and a desulfurization wastewater evaporation subsystem, wherein the economizer flue gas bypass subsystem comprises an economizer bypass flue, and can increase the flue gas temperature and the denitration efficiency under the low-load working condition; the desulfurization wastewater evaporation subsystem comprises a wastewater pipeline, a softening box, a concentration device, a wastewater preheater, a flue gas cooler, a heating medium water pump, a heating medium water pipeline, a wastewater pump and an atomization sprayer, and can perform concentration reduction, preheating and atomization on the wastewater to improve the evaporation efficiency of the wastewater. The invention further relates to a method for realizing zero discharging of the desulfurization wastewater under the low-load working condition by using the desulfurization wastewater zero discharging system based on the waste heat reuse. The system and the method havethe characteristics of a simple technological process, and can make effective use of waste heat of the flue gas to realize zero discharging of the wastewater under the low-load working condition of aunit and also improve the system denitration efficiency.

The invention discloses a fireproof door with a smoke-proof function, which comprises a door panel made of a flame-retardant plate, and the four edges of the door panel are fixed with screws and installed with a sealing strip made of flame-retardant rubber; the outer edge of the door panel is There is an embedding groove on the top, and an air duct is embedded and fixed in the embedding groove, the air duct is arranged in a ring shape, and air holes are evenly opened on the outside of the air duct; in the event of a fire, the present invention can use a suction fan to Produce a strong air extraction effect, draw the smoke from the gap of the door panel into the exhaust pipe from the air hole, then send it into the exhaust pipe, and finally discharge it from the air hole to the room where the fire occurred. When using the equipment, it is necessary to ensure that the indoor When there are no people left, the personnel in the escape passage can choose to turn on the suction fan. At this time, the amount of dense smoke permeating into the escape passage will be greatly reduced, which prevents the personnel in the escape passage from being hurt by the thick smoke, thus improving safety. high.

The invention discloses a flue gas desulfurizing, denitrating and dedusting device. The device comprises a water purifying tank, a first-stage desulfurization tank, a second-stage desulfurization tankand a denitration tank which are sequentially arranged from left to right, the water purifying tank is externally connected with a flue gas inlet tube, an air suction pump is arranged at the outer end of the flue gas inlet tube, an air outlet nozzle is arranged at the inner end of the air inlet tube, the air outlet nozzle is mounted at the inner bottom of the water purifying tank, the first-stagedesulfurization tank is connected with the water purifying tank by a first air suction tube, a desulfurization activated carbon fiber catalyst bed is mounted in the first-stage desulfurization tank,a cavity is arranged in the desulfurization activated carbon fiber catalyst bed, and the other end of the first air suction tube is communicated with the cavity; the desulfurization activated carbon fiber catalyst bed is a honeycomb structure; and the surface of the desulfurization activated carbon fiber catalyst bed is provided with micro-pores. The device greatly improves the efficiency of desulfurization treatment of exhaust gas, greatly improves the efficiency of denitration catalytic treatment of the exhaust gas, and has high purification efficiency for the exhaust gas.

The invention belongs to the field of oxidation and denitration equipment, and particularly relates to an ozone static mixing device which comprises a frame. A feeding device and a mixing device are arranged in the frame, the feeding device comprises a feeding main pipe, the feeding main pipe is arranged above the frame, a plurality of branch pipes which are distributed side by side and are perpendicularly connected with the feeding main pipe are arranged inside the frame, and a plurality of obliquely downward spray nozzles are arranged on the branch pipes along the length directions of the branch pipes; the mixing device comprises transverse mounting shafts in the frame in the vertical direction, and barriers which are connected with the transverse mounting frames by rotatable pipelines are uniformly arranged on the transverse mounting shafts and are distributed at different angles. The ozone static mixing device has the advantages that ozone sprayed out from the spray nozzles can beblocked and scattered by the barriers, the barriers are connected onto the mounting shafts by the rotatable pipelines, the adjacent barriers are distributed at the different angles, the angles can befreely selected according to actual conditions, pits or lugs which face different directions are arranged on the barriers, accordingly, the ozone can be assuredly scattered at 360-degree angles without dead spaces after being scattered on the barriers, and the ozone and flue gas can be sufficiently mixed with each other.

The invention relates to a honeycomb denitration catalyst with water resistance and a preparation method therefor and belongs to the flue gas denitration field. The catalyst employs titanium dioxide as a carrier and employs vanadium pentoxide as an active component, auxiliary agents of tungsten trioxide, an organic binding agent and a forming auxiliary agent are added, extrusion molding is carried out, and surface treatment is carried out by utilization of a waterproof agent. The catalyst is simple in preparation steps, the conversion rate of the active component vanadium pentoxide is high, the mechanical strength is high, and the service life is long. Solids are dispersed uniformly through the ball milling technology, the micropore structure of the catalyst is changed, and the bonding force of the waterproof agent sodium methyl silicate and the catalyst is raised. When the catalyst operates in flue gas with a low temperature (260-300 DEG C) and a high water content (the water content is more than 10%), the denitration efficiency still can reach more than 95%, the environment application range of the catalyst is widened, and the service life is 3.5-4.5 years.

The invention discloses a preparation method of a catalyst for simultaneously removing NO and fine particles in coal-fired flue gas. The preparation method of the catalyst for simultaneously removing NO and fine particles in coal-fired flue gas is characterized by comprising the concrete steps of firstly, soaking alkali-free glass fiber cloth by using soap water for 20min, washing and airing, then, soaking the alkali-free glass fiber cloth into hydrochloric acid with the concentration of 2mol/L at the temperature of 50 DEG C for 30min, slightly corroding the alkali-free glass fiber cloth, and then, washing and airing for later use; next, steeping the alkali-free glass fiber cloth by using Mn(NO3)2 and Ce(NO3)3 solutions; and finally, decomposing the alkali-free glass fiber cloth in an air environment of 200 DEG C for 4h to obtain CeO2 and MnOx. The preparation method can be used for realizing the low-temperature (150 DEG C) simultaneous removal of NO and fine particles in coal-fired flue gas, and is convenient in catalyst recovery, strong in sulfur resistance, greatly reduced in operation cost and remarkable in environment benefit.

The invention discloses a steam waste heat gradient utilization system for a carbon capture absorbent regeneration system. A reboiler in the steam waste heat gradient utilization system is communicated with a low-pressure cylinder of a steam turbine through a low-pressure supersaturated steam supply pipeline, a temperature reducing unit cools low-pressure supersaturated steam, the reboiler is communicated with a low-pressure flash evaporation unit through a condensed water supply pipeline, the low-pressure flash evaporation unit is communicated with a low-temperature multi-effect distillationunit through a low-temperature steam supply pipeline, and condensed water in the low-pressure flash evaporation unit returns to a steam-water circulation system of a waste heat boiler at the temperature of 70 DEG C or below. According to the invention, under the condition that carbon capture is carried out, seawater desalination or high-salinity wastewater treatment is carried out by utilizing thewaste heat of the capture unit, the natural gas-steam combined cycle-CO2 capture unit energy gradient utilization is achieved, meanwhile, co-production is achieved, the overall economy is improved, the temperature of condensate water returning to a steam-water circulation system of the waste heat boiler is reduced, and then flue gas waste heat in a waste heat boiler system is fully utilized.

The invention discloses a thermal power plant ultrasonic atomization desulfurization-dust removal-ammonia escape prevention integrated system. The system comprises a flue gas diversion system, an ultrasonic atomization system, a demisting system, a water treatment system, a dosing system and an automatic control system. Flue gas flows through an ultrasonic flue through diversion, in the ultrasonic flue, a circulating desulfurization compound lye is pressurized through a high pressure pump and is atomized by an ultrasonic device to form uniform fog groups composed of micron-sized fine fog drops, the ultrasonic flue is fully filled with the fog groups, the fog groups block passing flue gas, SO2 in the flue gas is captured by an atomization desulfurization agent and fast undergoes a reaction, an ultrasonic generator releases ultrasonic wave and shakes the desulfurization compound lye to obtain atomized gas having sizes of less than 5-10 microns, the atomized gas of the desulfurization compound lye has large surface tension and a certain viscidity and can effectively capture dust in flue gas, an ultrasonic generator can effectively capture ammonia escaping in the denitrification process and the escaped ammonia in the ultrasonic vibration atomization environment and nitrogen oxides further undergo a reduction reaction.