18 results about "Hearth" patented technology

The present invention discloses process and apparatus for producing catalyst grade superhigh purity Sb2O3. The production process includes the following steps: spraying 0.1-0.8 MPa compressed air from the top of antimony oxide furnace to antimony liquid; electrically heating the furnace to over 1100 deg.c and the central reaction area to over 1200 deg.c, or leading the Sb2O3 fume from the hearth to one high temperature reaction chamber and heating the Sb2O3 fume fast to 1100-1600 deg.c; cooling suddenly the high temperature Sb2O3 fume inside the quickly cooling device, and collecting with cloth bag to obtain the Sb2O3 product. The present invention has low power consumption, high yield, low production cost and other advantages.

The invention discloses a process for recovering valuable metal from residues containing zinc, comprising the following steps of: adding the residues containing the zinc to a melting furnace; spraying a gas containing oxygen and coal dust into a hearth of the melting furnace from the top and the side part of the melting furnace; discharging molten slag inside the melting furnace into a fuming furnace; spraying the gas containing the oxygen and the coal dust into the molten slag inside the fuming furnace; introducing the gas containing the oxygen above the molten slag inside the fuming furnace; collecting the dust of fumes inside the melting furnace and the fuming furnace; and discharging waste slag inside the fuming furnace. The process recovering the valuable metal from the residues containing the zinc has continuous operation, a large treatment quantity of the residues and high recovery rate of the valuable metal.

The invention relates to a device for testing a contamination characteristic of a segmental temperature control coal burning boiler. The device comprises a hearth and a flue, wherein the lower end of the hearth is connected with a combustor for spraying coal powder and an opposed air pipeline; the combustor is connected with a primary air inlet pipeline and a secondary air inlet pipeline respectively; the primary air inlet pipeline and the secondary air inlet pipeline as well as the opposed air pipeline are communicated with an air blower respectively; a heat preservation layer is arranged on the outer side of the hearth; a plurality of electric heating elements are arranged on the wall of the hearth in a segmental manner; segmental cooling clamping sleeves are arranged outside the flue; the tail of the flue is connected with a heat exchanger; and a plurality of test holes are formed in the hearth and the flue. The device can simulate various temperature situations of the hearth of the actual boiler, so that the stability and the flexibility of a test system are improved; by adopting segmental electric heating, the hearth can be stabilized at test required temperature; by adopting the segmental cooling clamping sleeves, the smoke temperature in the flue can be precisely controlled in a required range, and environments at different positions of the flue in the actual boiler can be simulated; and the contamination characteristic of the coal powder in different smoke temperature regions is convenient to research.

The invention discloses a method and system for treatment of kiln slag including lead and zinc. The method includes the steps that (1) the kiln slag including lead and zinc is dried, so that a kiln slag dried material is obtained; (2) the kiln slag dried material, pulverized coal and binder are mixed, so that a mixed material is obtained; (3) the mixed material is subjected to pelletizing treatment, so that mixed pellets are obtained; (4) the mixed pellets are fed to a feeding zone of a rotary hearth furnace, the mixed pellets are reduced through a preheating zone and a high-temperature zone of the rotary hearth furnace in sequence, smoke dust containing silver, zinc oxide and lead oxide is exhausted from the preheating zone, and the obtained metallized pellets are discharged from a discharging zone; and (5) the metallized pellets are subjected to ore grinding magnetic separation treatment, and metal iron powder and tailings are obtained. By the adoption of the method, carbon, iron, lead, zinc and silver in the lead and zinc kiln slag can be recycled comprehensively; and moreover, the recovery rate of the iron can reach 80%, the volatilization rate of the zinc can reach 96%, the volatilization rate of the lead can reach 95%, and the volatilization rate of the silver can reach 90%.

The invention provides a cyclone furnace denitration system and method. The cyclone furnace denitration system comprises a cyclone cylinder combustor and a reducing agent storage tank which are connected with the cyclone furnace; an SNCR first nozzle is arranged at the upper part of a hearth of the cyclone furnace, and an SNCR second nozzle is arranged in the top of a hearth flue; the axial direction of the cyclone cylinder combustor is vertically mounted on the outer side wall of the lower part of the hearth of the cyclone furnace, the side wall of the cyclone cylinder combustor is provided with an amino reducing agent first nozzle, and an amino reducing agent second nozzle is arranged on the side wall of the hearth above the cyclone cylinder combustor; a primary air inlet is formed in the axial direction of the cyclone cylinder combustor, and a secondary air inlet is oppositely arranged in the tangential direction of the side wall; the reducing agent storage tank is correspondingly connected with the SNCR first nozzle, the SNCR second nozzle, the amino reducing agent first nozzle and the amino reducing agent second nozzle through a reducing agent conveying pipe. The cyclone furnace denitration system and method has the advantages that the process flow is simple, the storage and conveying equipment of the SNCR denitration reducing agent is fully utilized, a new reducing agentstorage and conveying device does not need to be added, so that a new combined denitration system is formed, and the low emission of NOx of the cyclone furnace is realized.

The invention discloses a method and device for monitoring ash dirt on a convection heating surface of a boiler. The device comprises a sound wave guide tube, a sound wave receiver, a sound wave generator, a signal conditioner, a junction box, an input and output device, a power amplifier and an industrial personal computer. The method comprises the steps of: firstly, sending a sound wave signal by the industrial personal computer, amplifying with the power amplifier and then sending to the sound generator; secondly emitting sound wave by the wave generator, spreading the sound wave to a hearth of the boiler through the sound wave guide tube, receiving a sound wave return signal of the hearth of the boiler by the sound wave receiver, transmitting the sound wave return signal to the industrial personal computer; thirdly, measuring sound wave crossing time by the industrial personal computer, and solving the smoke side temperature of the boiler; and finally, solving an actual heat exchange coefficient and obtaining an ash dirt coefficient. The invention adopts a non-contact measurement manner, and can be applied to environments with high temperature and much dirt and pollution; and the device is simple in operation, and provides a clear and simple visualization interface.

The invention relates to a non-metal honeycomb combustion plate for a Chinese food kitchen range. The non-metal honeycomb combustion plate is matched with a premixed combustor, is made by performing extrusion molding and baking on a high-temperature-resistant non-metal material, and has a honeycomb structure; through holes are uniformly distributed at small pore diameters and high density; the surface layer of a plate body is coated with chemical raw materials prepared through a special formula. When mixed gas in a premixed chamber passes through, the mixed gas is remixed to the maximum extent and is contacted with a coating layer on a large area, and the coating layer performs a complete combustion oxidation reaction on fuel gas, so that the mixing degree and heat efficiency of the fuel gas and combustion-boosting air are maximized, and the emission of harmful gas is minimized.

The invention relates to manufacture of garbage incinerator, and in particular relates to a whirlwind suction garbage incinerator which has the advantage of rapidness, environmental friendliness and energy conservation. The garbage incinerator comprises a furnace structure, a chassis structure and a furnace cushion structure and is characterized in that the furnace structure is a whole furnace body which is cylindrical, a center steel tube is arranged in a hearth, and the centre steel tube is vertically installed and communicated with a chimney; the top of the hearth, the bottom of the hearthand a bent tube part are connected with an exhaust pipe which is communicated with the outside of the furnace body, the periphery of the lower part of the furnace body is provided with a plurality offans, and the inlet air pipe of each fan extends into the hearth so as to form a rotary airflow forming assembly on the chassis structure; the chassis structure part in the hearth is provided with a cavity with an upward hydraucone, the hearth of the furnace cushion structure is provided with one segment of cavity with an upward hydraucone, and two segments of cavities with downward hydraucones are positioned above; and the upper part of the furnace body is provided with at least two feed inlets. The garbage incinerator provided by the invention has the advantages of rapidness, environmental friendliness, energy conservation and lower cost.

A normal pressure vertical superconductor quick heating boiler is a boiler for central heating to family, enterprises and institutions, and urban resident districts. The boiler includes a double wall vertical boiler body, a firegrate is disposed in the hearth, a tap slag chamber is disposed under the firegrate, a main burning chamber is disposed on the firegrate, The top of the main burning chamber is disposed with fire gathering pipe group, the top of the fire gathering pipe group is disposed with four quick heating water containers, the backfire wall of the quick heating water container is disposed with superconductor pipe group. The superconductor in the superconductor pipe is affected by the high temperature air flow and quickly changes to high temperature gaseity, and feeds the heat quickly to water container to heat the water to high temperature. The boiler heats by grades and sections, and has high heat exchange efficiency. It is proved by test that the boiler of the present invention has a water output temperature of more than 90 DEG and heat efficiency improved more than 50% compared with the same products.

The invention relates to a gas stove with a new structure, which includes a stove and a supporting shell. A furnace is arranged inside the supporting shell, and a stove is installed in the furnace; the stove includes a combustion part, a gas mixing part, and a gas delivery pipe. , Air duct, the bottom of the combustion part is equipped with a gas mixing part, one end of the gas delivery pipe is connected to the gas mixing part, the other end is connected to the gas barrel, one end of the air duct is connected to the gas delivery pipe, the other end is connected to the fan, and the air duct is connected to the inside of the gas delivery pipe The wall is provided with partitions or spiral plates, and the beneficial effects of the present invention are: by setting partitions or spiral plates inside the air pipe and the gas delivery pipe at the same time, the intake vortex is formed, the utilization rate of air is improved, and the excess air coefficient is allowed to be reduced, thereby The total heat taken away by the unused air from the exhaust is reduced, and the utilization rate of fuel is improved.

The invention discloses a hearth ash blowing method. The hearth ash blowing method comprises the following steps that a hearth ash blowing optimization model is established; the upper limit and the lower limit of the critical pollution rate F<max>, the reasonable ash deposition time tau j and the ash blowing duration tau c are solved according to the hearth ash blowing optimization model; and start and stop of ash blowing of a hearth are controlled according to the upper limit and the lower limit of the critical pollution rate F<max>, the reasonable ash deposition time tau j and the ash blowing duration tau c. According to the hearth ash blowing method, on one hand, visual data of the real-time ash deposition condition of the hearth can be provided, effective reference is provided for ashblowing operation of the hearth, on the other hand, a ash blowing scheme is formulated by integrating the critical pollution rate and the ash blowing period, more appropriate ash blowing time and themost appropriate ash blowing duration are obtained, the heat transfer amount of the hearth based on unit time is maximized, and the operation effects of energy conservation, emission reduction and safety guarantee are achieved.

The invention discloses a light-wave stove with low energy consumption and safe use. The stove comprises a stainless steel stove body, wherein a hearth shell made of a refractory and heat insulating material is arranged inside the stainless steel stove body; and an infrared light-wave pipe is arranged inside the hearth shell, and is connected with a controller through lead wires. The light-wave stove has the advantages that: the light-wave stove with the structure converts infrared light energy into heat energy, has less consumed energy, no pollution, no naked flame in a using process, safe use and no light-wave radiation generation.

The invention discloses a multi-return-trip cooking and heating stove, which comprises a stove body, a fuel cabin, a high-temperature combustion chamber, a fire hole, a high-temperature smoke gas heating cavity and a flue, wherein the fuel cabin is arranged in the stove body; the high-temperature combustion chamber is communicated with the fuel cabin through a flame passage; the fire hole is formed in the upper end of the high-temperature combustion chamber; the high-temperature smoke gas heating cavity is positioned between the fire hole and the high-temperature combustion chamber; and the flue is communicated with the high-temperature smoke gas heating cavity. The multi-return-trip cooking and heating stove has the advantages that a hearth is divided into the fuel cabin for filling fuel and the high-temperature combustion chamber communicated with the fuel cabin through the flame passage; the fuel cabin stores the fuel; the combusting flame and the generated high-temperature smoke gas enter the high-temperature combustion chamber through the flame passage, upwards pass through a combustion device to be sufficiently gasified, and then enter the high-temperature smoke gas heating cavity to realize the heat supply on a cooking tool; meanwhile, high-temperature flame and high-temperature gas which return after impacting the bottom of the cooking tool pass through a high-temperature smoke gas return passage and then enter the flue; the sufficient heat exchange is performed by the return heat, a first water jacket and a second water jacket; and the temperature rise of heating water is fast.

The invention relates to a boiler high-temperature heating surface outer wall temperature measuring point arrangement method and a temperature detection system, and the arrangement method comprises the steps: carrying out the three-dimensional numerical simulation calculation of a whole hearth, and obtaining the numerical simulation results of a three-dimensional temperature field and a velocity field of flue gas in the hearth; according to the temperature field, the velocity field and a preset algorithm, obtaining heat flow density values of all pipes on any cross section in the working medium flowing direction under different loads of the high-temperature heating surface of each area; sequencing the heat flow density values of all positions of each high-temperature heating surface, and determining the positions where the heat flow density values exceed a first preset threshold value under different loads to serve as wall temperature measuring points, wherein the wall temperature measuring points are used for installing temperature detecting parts.

The invention discloses a transmission and clamping structure capable of realizing self-rotation of a workpiece in a vacuum furnace. The structure comprises a driving gear motor, a shaft seal device, a driving gear I, a driven gear I, a driving gear II, a driven gear II, a workpiece clamping device, a coupler, a transmission shaft, all component supporting structures and the like, wherein the transmission shaft is fixed on a hearth upper cover by means of a transmission shaft supporting structure, the driving gear II and the driven gear I are of an integrated structure and are installed on the hearth upper cover by means of a driving gear II supporting structure, the workpiece clamping device and the driven gear II are fixed on the hearth upper cover by means of the driven gear II supporting structure, and the workpiece is clamped and hoisted at the lower part of the workpiece clamping device. On the premise that bidirectional sealing and thermal protection are guaranteed, the workpiece can be driven by the gear motor by means of a gear transmission system to automatically and stably rotate, and loading and unloading are facilitated; and by means of the structure, all parts of the workpiece can be evenly heated and cooled, heat treatment distortion is reduced, and the consistency of the heat treatment performance of the workpiece is improved.