11results about How to "Reduce ammonia content" patented technology

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 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 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 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 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.