5 results about "Ammonia assimilation" patented technology

The application discloses a recycling method of condensate of ammonia shift stripping tower, comprising the following steps: S1 condensate cooling: hot condensate with a temperature of 80-100 DEG C is led out from the lower part of the ammonia shift stripping tower; S2 split delivery: the cooled condensate is divided into two routes by a condensate pump: the first route is sent to a synthetic gas washing tower to replace fresh desalted water for cooling and demisting of the synthetic gas, and fresh water consumption is reduced; the second route is sent to a carbonization mother liquor tank; S3 ammonia absorption concentration: the ammonia absorption pump is used to deliver the ammonia absorption mother liquor in the carbonization mother liquor tank to a high ammonia absorber; S4 concentrated ammonia water cooling: the concentrated ammonia water after concentration is sent into an air-cooled heat exchanger; S5 carbonization reaction product: ammonia in the concentrated ammonia water reacts with carbon dioxide to generate ammonium bicarbonate crystals, and ammonium bicarbonate products are obtained after separation and drying. The whole recycling process can be directly connected with the existing ammonia production system, the existing equipment does not need large-scale modification, the investment cost is low, and the industrialization popularization is easy.

The application discloses a soil Brevibacillus with ammonia oxidation capacity, an ammonia assimilation-ammonia oxidation composite microbial agent and application thereof. The strain is QN6, which has been preserved in the China General Microbiological Culture Collection Center on December 23, 2024, and the preservation number is CGMCC No.33138. The strain can efficiently convert ammonia nitrogen, increase the total nitrogen content and humic acid content of compost, and accelerate humification. The strain and compost bacillus QY6 (CGMCC No.33139) can be compounded into a double-function composite microbial agent to strengthen the ammonia assimilation and ammonia oxidation paths of compost, and provide an important technical breakthrough for solving the dual difficulties of 'difficult to preserve nitrogen and weak to promote decomposition' of compost. The strain and the double-function composite microbial agent can be used for composting, and the obtained compost product can significantly improve the soil nutrient supply capacity, promote crop growth and improve crop quality, and provide an effective technical means for agricultural waste resource utilization, soil improvement and high-quality crop cultivation.

The application provides an ammonia water preparation process and system, which comprises the following steps: deoxygenating raw gas to obtain deoxygenated raw gas; mixing the deoxygenated raw gas with cooled ammonia synthesis gas to obtain ammonia-rich gas; washing and absorbing the ammonia-rich gas in an ammonia absorption tower to obtain crude ammonia water and ammonia-removed circulating gas; after dehydration, compression and heat exchange, the circulating gas enters a catalyst bed for ammonia synthesis reaction to generate ammonia synthesis gas, which is cooled by heat exchange; and part of the crude ammonia water after cooling is recycled into the ammonia absorption tower, and the other part is used to prepare ammonia water products by flash evaporation. The system is suitable for the process, directly generates ammonia water products, does not need to be diluted, has no ammonia gas liquefaction and liquid ammonia storage links, has lower equipment process requirements, is suitable for small-scale green hydrogen green ammonia synthesis processes, has low application scene requirements and has a wide application range.

This invention relates to a nitrile manufacturing process with improved ammonia absorption effect. This process atomizes the spray liquid, increases the contact area with ammonia, and improves mass transfer efficiency. The nitrile manufacturing process includes a step of subjecting hydrocarbon raw materials to an ammoxidation reaction to produce a reaction product containing nitrile (referred to as the reaction step), and a step of supplying the reaction product from a gas inlet to an absorption device, spraying the reaction product with a spray liquid via a spray device in the absorption device to cool the reaction product and form an absorption atmosphere (referred to as the cooling step). Here, when measured at a vertical distance of 3000 mm from the gas inlet, the extinction coefficient of the absorption atmosphere is 0.004 to 0.02 m -1 That is the case.

The present application relates to a kind of recycling method of acetylene and ammonia in acetylene reaction tail gas, the acetylene reaction tail gas is discharged with liquid ammonia as solvent and contains acetylene and ammonia in the tail gas of acetylene reaction;The recycling method of the acetylene reaction tail gas includes the following steps: (1) the acetylene reaction tail gas is passed into acetylene absorption system, and the acetylene in the acetylene reaction tail gas is absorbed by acetylene absorbent;(2) the tail gas after being treated in step (1) is passed into ammonia absorption system, and the ammonia in the processed tail gas is absorbed by ammonia absorbent, to obtain the absorption material containing ammonia;(3) the absorption material containing ammonia obtained in step (2) is desorbed in ammonia desorption system to recover ammonia.The recycling method in the application can effectively recover acetylene and ammonia in acetylene reaction tail gas, and make acetylene and ammonia have high recovery rate, solve the safety environmental protection problem existing in tail gas direct discharge or incineration treatment, and also can reduce production cost.