20results about How to "Reduce ammonia content" patented technology

The invention discloses an environmentally friendly and energy-saving ammonia recovery device and method for ammonia-containing condensate in coal chemical industry, comprising a primary stripping tower feed preheater, a primary stripping tower, a stripping gas scrubber, an acid gas heat exchanger, an ammonia-containing condensate tank, a secondary stripping tower, a partial condensate tank, a multi-stage condensation unit, an ammonia refining unit, and an ammonia water preparation unit; the ammonia-containing condensate is firstly concentrated by passing through the primary stripping tower to reduce the processing capacity of the secondary stripping tower, and the concentration of raw materials entering the secondary stripping tower is adjusted to ensure the optimal feed concentration, while reducing investment and energy consumption, high-quality concentrated ammonia water and elemental sulfur are recovered, and the environmental protection hidden danger of ammonia and water in the acid gas flare is solved.

The utility model relates to a triamine workshop dust removal device, which comprises a dust removal tower and a dust suction assembly arranged on the surface of the dust removal tower, a solution box is fixedly arranged on the surface of the dust removal tower, desalted water is filled in the solution box, and a dust removal assembly is arranged in the dust removal tower, the dust removal assembly comprises a filter plate fixedly mounted on the inner wall of the dust removal tower, a spraying pipe is further fixedly mounted on the inner wall of the dust removal tower and located below the filter plate, a plurality of nozzles are fixedly mounted at the bottom of the spraying pipe, and a water pump is fixedly mounted at the top of the solution box; a liquid inlet pipe extending into the solution box is fixedly installed at the water inlet end of the water pump, and a liquid outlet pipe communicated with the spraying pipe is fixedly installed at the water outlet end of the water pump. According to the triamine workshop dust removal device and the dual dust treatment method, the dust treatment effect can be guaranteed, meanwhile, the ammonia content in the finally discharged gas is almost zero, the hidden danger of environmental protection is solved, the labor intensity of personnel is relieved, and a certain economic effect is achieved.

This invention discloses an ammonium sulfate wastewater treatment system and method, comprising an ammonium sulfate wastewater storage tank for collecting ammonium sulfate wastewater; a calcium hydroxide preparation system for preparing calcium hydroxide solution; an evaporator and a first circulating heater for reacting and evaporating the ammonium sulfate wastewater and calcium hydroxide; a first crystallizer and a second circulating heater, a second crystallizer, and a third circulating heater for two-stage evaporation and crystallization; the final concentrated liquid is filtered and flows into a mother liquor collection tank for convenient wastewater treatment, while the evaporated ammonia gas is absorbed by a cooling absorption tower and a condensate collection tank to form ammonia water; the condensate from the second heat exchanger, the first circulating heater, the second circulating heater, and the third circulating heater is also returned to the condensate collection tank. This wastewater treatment system and method distill and crystallizes ammonium sulfate wastewater with calcium hydroxide solution, thereby recovering calcium sulfate and ammonia water, thus achieving waste utilization.

The application discloses a poultry feather hydrolysis wastewater deamination system and a deamination method thereof, which comprises a water pump, an inlet of which is connected with a first circulating pipeline, and an outlet of which is connected with a second circulating pipeline; a first wastewater pipeline, which is in communication with the first circulating pipeline to supply wastewater; an electric heater, an inlet of which is in communication with the second circulating pipeline, and an outlet of which is connected with a third circulating pipeline; a flash tank, an inlet of which is in communication with the third circulating pipeline, and an outlet of which is in communication with the first circulating pipeline; a nozzle, which is arranged in the flash tank, an inlet of which is in communication with the third circulating pipeline to receive wastewater, and which is arranged to spray the wastewater in the flash tank in a mist state; and a vacuumizing assembly, an inlet of which is in communication with the flash tank to discharge gas in the flash tank to form a vacuum negative pressure state, and an outlet of which is connected with a gas-water separating assembly to separate gas ammonia and liquid.

The utility model discloses a nitro compound fertilizer high tower two-section evaporation tail gas treatment device which comprises a two-section evaporator, an outlet of the two-section evaporator is communicated with an air inlet of an air cooler through a pipeline, and a first switch valve is arranged on the pipeline. A liquid outlet of the air cooler is provided with three liquid discharge pipes, each liquid discharge pipe is provided with a second switch valve, and the tail ends of the three liquid discharge pipes are respectively communicated with the ammonium nitrate concentration tank, the washing tank and the middle tank. The utility model relates to the technical field of tail gas treatment, in particular to a nitro compound fertilizer high-tower two-section evaporation tail gas treatment device, which effectively cools high-temperature tail gas by arranging an air cooler at a two-section evaporation port, and the cooled tail gas enters a scrubber, so that a high-flow-rate scrubbing solution forms a vacuumizing area, and gas, liquid and solid phases are fully mixed, so that the tail gas is completely evaporated, and the tail gas is completely evaporated. The content of dust and ammonia in the tail gas of the second-stage evaporator is reduced, and the pre-washing treatment effect is achieved; then the tail gas enters a tail gas washing tower to be separated and demisted, and entrainment carried in the tail gas is thoroughly removed.

The utility model discloses an anti-scale ammonia distillation device for coking wastewater, which comprises an ammonia distillation tower and a plurality of tower plates, a clapboard is arranged at the lower part in the ammonia distillation tower, the internal space of the ammonia distillation tower is divided into an ammonia distillation cavity and a liquid inlet cavity by the clapboard, a hollow ball is arranged in the ammonia distillation cavity above each tower plate, a plurality of lower spray holes are processed on the lower hemispheroid of the ball, and a plurality of lower spray holes are processed on the lower hemispheroid of the ball. A hollow vertical shaft is arranged on the vertical center line of the ammonia distillation cavity, penetrates through the ball and is fixedly connected with the ball, a through hole is formed in the vertical shaft in the ball, the upper end of the vertical shaft extends out of the ammonia distillation cavity and then is in transmission connection with a motor, the lower end of the vertical shaft extends into the liquid inlet cavity, and the vertical shaft is movably and hermetically connected with the partition plate through a connecting piece; the bottom of the ammonia distillation cavity is communicated with an inlet of the filter through a liquid discharge pipe, an outlet of the filter is communicated with the liquid inlet cavity through a return pipe, and a pressure pump is arranged on the return pipe. In conclusion, the ammonia still has the advantages of being good in ammonia still effect, high in descaling efficiency and capable of reducing equipment maintenance frequency.

The invention provides a method and a device for removing ammonia in a vanadium-containing solution. The method for removing ammonia in the vanadium-containing solution comprises the following steps: (1) selectively adding water into a reaction kettle, heating the water in the reaction kettle to 60-80 DEG C, stirring and keeping an air draft state until the reaction in the step (3) is finished; (2) adding the vanadium-containing sample and alkali into a reaction kettle according to a preset feeding speed, and controlling the pH value of the solution in the reaction kettle to be 9.5-11.5; and (3) heating the solution in the reaction kettle to 85-110 DEG C, and carrying out a deamination reaction so as to remove ammonia in the vanadium-containing sample. The method provided by the invention can realize efficient and rapid removal of ammonia, and the removal rate of ammonia reaches 99%-100%.

The invention discloses a process and a system for comprehensively treating ammonia-containing silane waste gas. The system comprises a first condenser, a silane combustion tower, a dust remover, an ammonia still, a second condenser and an ammonia water storage tank. According to the invention, silane and ammonia gas can be treated at the same time, the tedious process of respectively treating two kinds of waste gas in the traditional technology is avoided, and the treatment efficiency is improved; the first condenser is arranged for efficient condensation, it is ensured that volatile substances such as ammonia gas are effectively recycled, and resource waste is reduced; by arranging the silane combustion tower, combustible components in silane waste gas can be fully combusted and converted into harmless silicon dioxide dust, and efficient treatment of the silane waste gas is ensured; the ammonia still can enable liquid and gas to be in full contact, so that the heat transfer and mass transfer effects are improved, and the evaporation efficiency is improved; by means of treatment of the ammonia still, byproducts such as high-concentration ammonia water can be recycled.

A method for recovering and treating ammonia-containing tail gas in the back stage for synthesizing aromatic nitrile comprises passing the ammonia-containing tail gas into a first spray absorption tower and a second spray absorption tower in sequence, absorbing ammonia in the ammonia-containing tail gas in a liquid phase, realizing ammonia recovery, and directly discharging waste gas; wherein the absorbent A of the first spray absorption tower is water; and the absorbent B of the first spray absorption tower comprises glycolic acid, vinylphosphonic acid and aluminum sulfate. The method greatly increases the recovery of ammonia in the ammonia-containing tail gas through two-stage spraying, and the ammonia content in the tail gas after treatment is low and meets the emission standards.

The invention provides a recycling deamination and dust removal purification system and a recycling deamination and dust removal purification method for fluidized bed hydrocyanic acid process gas, which adopt a composite deamination and decyanation dust removal technology to perform quenching, deamination and dust removal on the process gas and perform decyanation concentration on a tower kettle pregnant solution at the same time to recover catalytic particles and ammonia in an ultra-clean hydrocyanic acid removal process. The ammonia content of the purified process gas is less than 3 ppm, the dust content is less than 1 ppm, the hydrocyanic acid loss in the separation process is less, the yield is greater than 99.5%, the ammonia content of the produced water is less than 50 ppm, the purity of the produced ammonia is greater than 99.9%, the purification effect is good, the resource utilization rate is high, and the method is suitable for popularization.

The application discloses a feed for reducing urease activity of pig manure and a preparation method thereof. The feed is prepared from the following components with a percentage of mass: grape branch leaf powder 80-90%, grape sugar 3-12%, and sodium acetate 5-12% after fermentation by yeast. The preparation method comprises the following steps: crushing fresh grape branch leaves into granules, drying the granules, crushing and sieving to obtain grape branch leaf powder; mixing the grape branch leaf powder, grape sugar and sodium acetate, stirring uniformly, adding purified water to adjust moisture, mixing and pretreating, sterilizing to obtain grape branch leaf powder mixed raw materials; culturing yeast in malt juice liquid medium to obtain fermentation broth; inoculating the fermentation broth into the grape branch leaf powder mixed raw materials at a mass ratio of 4-8% to obtain the feed. The feed can effectively reduce the ammonia content in the breeding environment and the urease activity of pig manure, and the preparation method is simple, safe and environmentally friendly.

The invention discloses an environment-friendly and energy-saving ammonia recovery device and method for ammonia-containing condensate in the coal chemical industry. The device comprises a first-stage stripping tower feeding preheater, a first-stage stripping tower, a stripping gas washing tower, an acid gas heat exchanger, an ammonia-containing condensate tank, a second-stage stripping tower, a fractional condensate tank, a multi-stage condensation unit, an ammonia gas refining unit and an ammonia water preparation unit. Ammonia-containing condensate firstly passes through the first-stage stripping tower to be concentrated, the treatment capacity of the second-stage stripping tower is reduced, meanwhile, the concentration of raw materials entering the second-stage stripping tower is adjusted, the optimal feeding concentration is guaranteed, high-quality concentrated ammonia water and elemental sulfur are recycled while investment and energy consumption are reduced, and the quality of the ammonia-containing condensate is improved. And the environment-friendly hidden danger that the acid gas torch carries ammonia and water is solved.

The utility model relates to the technical field of ammonia-containing tail gas treatment, in particular to an ammonia-containing tail gas treatment device of an evaporative crystallization system and the evaporative crystallization system, and the device comprises a tail gas liquefaction mechanism, a liquid storage tank and a reaction kettle. Wherein the tail gas liquefaction mechanism is configured to liquefy ammonia-containing tail gas; the liquid storage tank is communicated with the tail gas liquefaction mechanism through a first driving element, and the first driving element is used for conveying liquefied ammonia-containing tail gas to the liquid storage tank for storage; the reaction kettle is provided with a liquid inlet and an exhaust port, and the liquid inlet is configured to be used for adding a hydrogen peroxide solution into the reaction kettle; the reaction kettle is communicated with the liquid storage tank through a second driving element, the second driving element is used for conveying liquefied ammonia-containing tail gas in the liquid storage tank into the reaction kettle to be mixed with a hydrogen peroxide solution to react, and the exhaust port is constructed to discharge gas in the reaction kettle, so that the ammonia content of the tail gas is reduced; the influence of tail gas on the environment is reduced and the health degree of operators is improved.

The invention provides a liquid ammonia and ammonia water co-production device and method, and belongs to the technical field of ammonia production. The liquid ammonia and ammonia water co-production device comprises a cooler E3, an ammonia cooler E4, an ammonia separator S1 and an ammonia washing tower T3, wherein the yield ratio of the liquid ammonia to the ammonia water can be adjusted by adjusting the ammonia cooling temperature and / or the evaporation liquid level height in the ammonia cooler E4. According to the method, after ammonia synthesis gas is sequentially subjected to two-stage cooling, a liquid phase separated by an ammonia separator S1 is liquid ammonia, and a gas phase is in contact with water in an ammonia washing tower T3 to form ammonia water. According to the invention, ammonia water can be obtained in the ammonia washing tower T3 while liquid ammonia is obtained in the ammonia separator S1, and a large amount of corresponding equipment does not need to be added; and according to requirements, the temperature of the gas after ammonia cooling can be controlled by controlling the ammonia cooling temperature of the ammonia cooler E4 and / or the evaporation liquid level height of the ammonia cooler E4, so that the purpose of timely distributing and adjusting the yield ratio of the liquid ammonia to the ammonia water is achieved, namely, the ratio of the liquid ammonia to the ammonia water can be adjusted.

The utility model provides a continuous production device for EDTA (Ethylene Diamine Tetraacetic Acid) condensation reaction, which belongs to the technical field of chemical equipment and comprises a reaction deamination tower, a first heat exchanger, a second heat exchanger and a blender, a tubular heat exchanger is arranged at the top of the reaction deamination tower, and an ammonia discharge pipe is arranged at the top of the tubular heat exchanger; the materials subjected to heat exchange by the second heat exchanger and the materials subjected to heat exchange by the first heat exchanger are mixed in the blender; and the mixer is communicated with the reaction deamination tower through a mixture feeding pipe. An extraction pipe is arranged at the bottom of the reaction deamination tower, part of high-temperature reaction liquid extracted from the bottom of the reaction deamination tower by a ramming circulating pump on the extraction pipe enters the first heat exchanger and the second heat exchanger for heat exchange, and part of the high-temperature reaction liquid enters the blender through a circulating communicating pipe for material mixing. By utilizing the device, the ammonia discharge effect and the ammonia discharge timeliness can be improved, the product quality after the EDTA condensation reaction can be improved, the land can be saved, and the production cost, the energy consumption and the labor intensity can be reduced.

The invention discloses a plant-based crusting environment-friendly ammonia-eliminating dust suppressant for eliminating ammonia-containing dust poison and a testing method of the plant-based crusting environment-friendly ammonia-eliminating dust suppressant. The dust suppressant is prepared from the following raw materials in percentage by mass: 0.2 to 0.4 percent of guar gum serving as a binder, 0.03 to 0.06 percent of lauryl sodium sulfate serving as a surfactant, 1 to 5 percent of silicate serving as an ammonia purifying agent, 0.1 to 0.3 percent of ferric oxide serving as a catalyst, 0.2 to 0.4 percent of titanium oxide serving as a catalyst, 1 to 3 percent of sodium lactate serving as a humectant, 5 to 20 percent of ethylene glycol serving as an anti-freezing agent and 74.45 to 92.47 percent of dust suppressant stock solution. The test method comprises a dust inhibition efficiency test, a moisture absorption and water retention test, a water resistance test and an ammonia elimination performance test. The ammonia-eliminating dust suppressant has the characteristics of no toxicity, easiness in degradation, environment friendliness and the like, can quickly and efficiently suppress ammonia-containing dust poison generated by iron ore blasting, and eliminates the harm of mine reentrainment dust to the environment and people.

This invention belongs to the field of solid hazardous waste treatment and resource utilization. Specifically, it discloses a method for preparing and applying a chromium-removing and ammonia-reducing agent for a chromium-containing collagen solution extracted from waste leather scraps. The chromium-removing and ammonia-reducing agent comprises a chromium ion replacement material, an electrostatic adsorption material, an ammonia-reducing material, a magnetic material, and a coating material. The chromium ion replacement material is prepared by grafting silica with a silane coupling agent and malonic acid and citric acid. The electrostatic adsorption material is obtained by modifying inorganic magnesium silicate materials. The ammonia-reducing material is obtained by synthesizing zeolite and modifying zeolite. The magnetic material is prepared by using Fe... 2+ Fe 3+ The raw materials are synthesized and prepared; the coating material is an organic polymer material; the coating material is obtained by coating chromium ion replacement material, electrostatic adsorption material, ammonia-reducing material, and magnetic material together through a process to obtain a chromium removal and ammonia-reducing agent. This invention has the advantages of simple process, low cost, thorough chromium removal, significant ammonia reduction, and suitability for industrial application.

The utility model relates to melamine ammonia production technical field, is a kind of melamine ammonia washing tower in ammonia gas efficient separation purification device, it includes primary heat exchanger, secondary heat exchanger, lithium bromide refrigerator, ammonia washing tower, primary heat exchanger import is connected with the first process water pipeline, second process water pipeline is connected between primary heat exchanger outlet and secondary heat exchanger, third process water pipeline is connected between secondary heat exchanger and ammonia washing tower, bromine cold water upper water pipeline is connected between secondary heat exchanger import and lithium bromide refrigerator export, bromine cold water backwater pipeline is connected between secondary heat exchanger outlet and lithium bromide refrigerator import.The utility model is reasonable and compact in structure, convenient to use, it recovers the low-level heat energy of steam condensate using lithium bromide refrigerator, produces bromine cold water, and bromine cold water is used for the cooling of ammonia washing tower washing liquid, effectively improves the net ammonia effect of ammonia washing tower.

The invention relates to a method for enhancing nitrification and denitrification effects in a microbial purifier for aquaculture water, which divides the working time period of the microbial purifier for aquaculture water into a nitrification time period and a denitrification time period, effectively utilizes sediment mixed liquor at the bottom of a biological filler bin, not only can improve the utilization rate of equipment, but also can enhance the nitrification and denitrification effects of the microbial purifier for aquaculture water. The complete process of nitrification and denitrification is realized, and the occupied space of equipment can be reduced; in the nitrification period, the biological filler bin is in an aerobic environment, aerobic microorganisms can perform normal nitrification reaction, and the ammonia content in the biological filler bin is reduced; in the denitrification period, sediment mixed liquid at the bottom layer in the purifier is guided into the biological filler bin and released, the oxygen content in the biological filler bin is reduced, anaerobic microorganisms can be subjected to cultivation and denitrification degradation reaction in the environment, and the sediment mixed liquid can perform necessary carbon source supplementation on the denitrification reaction, so that the denitrification effect is improved. A compensation function is provided for guaranteeing the denitrification process, and the full nitrification and denitrification effects are enhanced.

The invention discloses a pet food capable of improving peculiar smell of excrement and a preparation method of the pet food. The pet food comprises pet base food and a material mixing layer from inside to outside, the surface of the pet base food is wrapped with the material mixing layer, the pet base food comprises, by weight, 60-70 parts of pet base food and 30-40 parts of the material mixing layer, and the material mixing layer comprises, by weight, 60-70 parts of livestock and poultry viscera protein ferment powder, 10-15 parts of radix puerariae extract, 5-8 parts of animal grease and 5-10 parts of fructo-oligosaccharide. At least one isolating layer is arranged between the pet base food and the mixed material layer, and the weight of the isolating layer is 2-5% of the total weight of the pet food. The prepared pet food is of a multi-layer structure, the middle is of an isolation layer structure of a macroporous structure, the isolation layer adopts a radix paeoniae alba total saponin extract with deodorization and ammonia reduction effects, livestock and poultry viscera protein ferment powder is adopted in a mixing layer, livestock and poultry viscera protein is fermented and decomposed to obtain small molecule peptides and short-chain fatty acid, and the small molecule peptides and the short-chain fatty acid are mixed with the isolation layer. Peculiar smell in excrement of pets is reduced, palatability is good, and market application prospects are wide.