10 results about "Filter press" patented technology

The invention provides a slow-release compound fertilizer, which is a spherical or near-spherical granular compound fertilizer having a layered structure, wherein the innermost layer is a nitrogenous fertilizer layer; the intermediate layer is a potassic fertilizer layer; the outer layer is a mineral layer containing phosphorus; proportions of nitrogen, phosphorus and potassium are determined according to thicknesses of the fertilizer layers. The invention further provides a production method of the slow-release compound fertilizer. Tailing pulp is generated after heavy metals, manganese and iron are recycled from leached residues of production enterprises for electrolyzing manganese metal and manganese dioxide. The production method comprises the following steps of: adding flocculating agent, the weight of which is 0.01-0.02% of that of tailing mud, into the obtained tailing pulp, carrying out filter pressing by using a belt filter press, wherein the moisture content of filtered mud is 40-50%; and then, adding phosphatic fertilizer into the filtered mud, uniformly mixing, and carrying out calendering forming three times and roller-crushing calendaring granulating once by adopting a fertilizer granulator and drying to obtain the slow-release compound fertilizer.

The invention discloses a pipeline transportation means for alumyte. First, placing a raw material crusher on the alumyte mine, alumyte, lime and water are feed in the raw material crusher proportional. The water cut of the aqueous size after grinding is 45-55%; Secondary, sending the aqueous size to the aluminum ore size box in the alumina manufacturer using the pump amd the pipe; and then press with a pressing filter. The water-content coefficient of the filter cake after press is lower than 20%, And then send the filter cake to the aluminum ore bunker stored and dry the water-content coefficient of the filter cake to lower than 10%. The invention can reduce program investments substantial, cost down transport cost and improve the work environment of the alumina manufacturer.

The invention discloses a squeezing safety and automatic alarm device of a diaphragm filter press. According to the device, a PLC (Programmable Logic Controller) is arranged to automatically control the operation; a digital display pressure controller is arranged on an oil cylinder body of a hydraulic system; an intelligent pressure transmitter is arranged on a diaphragm squeezing water pipeline;the digital display pressure controller and the intelligent pressure transmitter are connected with the PLC; a pressure switch is connected with the intelligent pressure transmitter; a text display device is connected with the PLC; a buzzer alarm is connected with the PLC; a squeezing pump switch is connected with the intelligent pressure transmitter; a hydraulic pump switch is connected with thedigital display pressure controller; the digital display pressure controller is installed on the oil cylinder body of the hydraulic system; and the digital display pressure controller is provided witha pressure contact lower limit, a pressure contact upper limit and a pressure contact ultimate upper limit. According to the invention, the use safety of the whole equipment of the diaphragm filter press is ensured, a burst accident is avoided during squeezing of a diaphragm filter plate, the safety of personnel on a working site is ensured, and the economic benefit is improved.

The invention belongs to the technical field of alkali residue recycling and discloses a reutilization method for alkali-making waste residue liquid. The reutilization method for the alkali-making waste residue liquid comprises the following steps of 1, carrying out rotary liquid separation on the alkali-making waste residue liquid to obtain clear liquid and alkali residues; 2, washing the alkaliresidues with clear water and then drying the alkali residues for sale; 3, clarifying the clear liquid to obtain supernate and thick liquid at the bottom; 4, guiding the supernate out for injection well brine extraction; and 5, dividing the thick liquid at the bottom into dilute-base thick liquid and dry-base thick liquid, wherein the dilute-base thick liquid is used as a raw material for preparing gypsum by reacting with ammonium sulfate, or, serving as a raw material for brick making or desulfurizing agents, and the dry-base thick liquid is directly sent to an anti-seepage treatment site forbackfilling. The invention further discloses a reutilization system for the alkali-making waste residue liquid. The reutilization system comprises rotary liquid separators, a sand separator, a conveyor, a sand washer, a clarifying barrel, a washer and a filter press. According to the reutilization method for the alkali-making waste residue liquid and the system using the reutilization method, theindustrial alkali-making waste residue liquid is treated so that the external emission of solid wastes of enterprises can be reduced and the alkali residue products can be turned from waste into wealth for sale.

The invention relates to a disease-dried livestock and poultry drying wastewater treatment technology. The technology comprises the following steps: pumping wastewater generated in a drying process into a first reactor, adding a nonionic polyacrylamide reagent into the first reactor, performing uniform stirring, standing the obtained solution, pumping the obtained upper liquid into a rendering tank, and pumping the obtained lower liquid into a second reactor; adding an anionic polyacrylamide reagent and a cationic polyacrylamide reagent into the second reactor, performing uniform stirring, standing the obtained solution, pumping the obtained supernatant into a plate-and-frame filter press filled with polyacrylamide water-absorbent resin, and pumping the obtained lower floc into the rendering tank; and pumping a filtrate in the plate-and-frame filter press into a membrane module, detecting a clear liquid in the membrane module, directly discharging the qualified clear liquid, and pumping the above obtained concentrate into the second reactor. The technology has the advantages of simplicity in operation, low energy consumption, and strong applicability to the quality of water, and the treated water has low COD content and low ammonia nitrogen content.

The invention provides a filter pressing unit, which comprises a filter pressing cylinder, a piston arranged in the filter pressing cylinder and a connecting plate for supporting the filter pressing cylinder; the upper and lower adjacent filter pressing units are separated by a connecting plate, and the filter pressing cylinder is movably connected with the connecting plate positioned above the filter pressing cylinder through a connecting assembly; the connecting assembly comprises: a guide sleeve, which is connected with the filter pressing cylinder and is provided with an inner cavity, theaxis of which is parallel to the axis of the filter pressing cylinder; a connecting bolt, which is connected with the guide sleeve, has the head arranged in the inner cavity of the guide sleeve and the tail connected with a connecting plate located above the filter pressing cylinder, wherein the connecting bolt and the guide sleeve can relatively move in the axial direction of the inner cavity, and the head and the guide sleeve form axial limiting so that the connecting bolt and the guide sleeve cannot be separated in the axial direction; and a spring, which is sleeved outside the guide sleeve, and has one end propped against the filter pressing cylinder and the other end propped against the connecting plate positioned above the filter pressing cylinder. Balanced stress can be achieved during filter pressing, and the motion parallelism and perpendicularity of all parts of the filter pressing unit are guaranteed.

The invention discloses a full-tooth continuous quenching method of a slewing bearing, which comprises the following steps: (1) selecting equipment and raw materials: preparing an electric furnace, a filter press, a dissolving tank, a single-effect evaporator, a filter screen, an extraction tank and a steam boiler, and preparing rare earth fluorescent powder waste, caustic soda flakes, hydrochloric acid, a P507 extraction agent, water, caustic soda liquid and kerosene; and placing the mixed mixture in an electric furnace for calcining. According to the full-tooth continuous quenching method for the slewing bearing, the caustic soda flakes are utilized and subjected to low-temperature roasting in the electric furnace, so that the caustic soda flakes react with the caustic soda flakes, rare earth elements in the rare earth fluorescent powder waste are converted, and therefore the subsequent reaction is not direct reaction of the rare earth elements and acid, but neutralization reaction of the converted alkaline substances and the acid is achieved; the reaction can be quicker, so that the reaction efficiency is greatly improved.

The invention relates to an industrial wastewater discharge treatment device including a wastewater inlet pipe, a heat exchanging chamber, a water storage tower, a first wastewater treatment chamber, a second wastewater treatment chamber, a third wastewater treatment chamber, a pump and a water storage chamber; the wastewater inlet pipe passes through the heat exchanging chamber and is connected to the upper part of the water storage tower; the water storage tower, the first wastewater treatment chamber, the second wastewater treatment chamber and the third wastewater treatment chamber communicate successively through water inlet pipelines; the third wastewater treatment chamber communicates with a water inlet of the pump; a water outlet of the pump communicates with a first water outlet pipeline and a second water outlet pipeline; the first water outlet pipeline passes through the heat exchanging chamber and extends and communicates to the top of the interior of the water storage tower; the second water outlet pipeline is connected with the water storage chamber. The industrial wastewater discharge treatment device has the beneficial effects that industrial wastewater and waste gas are subjected to heat exchange, and a cooling liquid can be used for supplying heat; the industrial wastewater is not connected directly with a runner of a heat exchanger, the problem of scaling of a medium runner of the heat exchanger is solved, the number of times of maintenance of the heat exchanger is reduced, and the treatment costs are reduced; a mud cake prepared by a sludge filter-press device can be used in flower and glass fertilizers, and water in the water storage chamber can be used for irrigation.