5results 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 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.

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.