16 results about "Ammonia assimilation" patented technology

An ammonia synthesis system and method integrating an ammonia absorption refrigeration cycle and an ammonia synthesis cycle. The ammonia synthesis cycle includes a multi-stage non-adiabatic reactor system formed of a plurality of non-adiabatic reactors for converting synthesis gas containing hydrogen and nitrogen to ammonia. The ammonia is cooled and stored as a cold ammonia product. The lean solution from the ammonia absorption refrigeration cycle may be used as a heat exchange common fluid for the reactor, and the refrigeration cycle may also be used to cool the ammonia from the synthesis cycle for cold storage. Almost all of the syngas is converted in a single pass through a multi-stage non-adiabatic reactor system without recycling streams and associated energy consumption.

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.

A strain of antibiotic-resistant marine heterotrophic ammonia assimilation-aerobic denitrifying bacteria and its application, belongs to the field of water treatment of aquaculture. The seawater antibiotic-resistant high-efficiency nitrogen removal Marinobacter nitratireducens LAN01 can use polyhydroxyalkanoate as the sole carbon source, and can realize heterotrophic ammonia assimilation and aerobic denitrification function under the stress of different concentrations of sulfamethoxazole antibiotics, and simultaneously transform phosphate. The strain has multiple resistances such as high salinity, high alkalinity and antibiotic, and can be used for seawater aquaculture effluent treatment, seawater recirculating aquaculture water treatment, high-salinity wastewater treatment and saline-alkali soil bioremediation, etc. To realize the simultaneous recovery of nitrogen, phosphorus and other nutrients in the seawater aquaculture environment.

A method and system for creation of an ammonia absorbent. The method can include selecting a metal halide salt. The method can also include mixing the selected metal halide salt with a binder to form a mixture. Additionally, the method can involve adding a solvent to the mixture to solubilize the metal halide salt, thereby forming a uniform paste, where the solvent is chosen from the group consisting of water and organic solvents. The method can further include extruding the uniform paste to form long cylindrical rods. Furthermore, the method can involve drying the extruded cylindrical rods to remove moisture. Finally, the method can include cutting the dried cylindrical rods into pellets, thereby synthesizing an ammonia absorbent.

The invention provides an ionic liquid for ammonia separation of synthetic ammonia recycle gas as well as a preparation method and application of the ionic liquid, belongs to the technical field of gas separation and purification, and aims at solving the technical problems of high energy consumption, high pollution and poor absorbent ammonia selectivity in the ammonia separation technology of the synthetic ammonia recycle gas. According to the ionic liquid, 1-ethylimidazole is used as a cation, hydroxyl substituted benzoic acid / phenylacetate is used as an anion, and high-selectivity ammonia absorption is achieved through the synergistic effect of an ortho-position electron withdrawing effect and a multi-element hydrogen bond network. Through the ortho-position hydroxyl design of anions, the strong hydrogen-bond interaction of hydroxyl is improved, the carboxyl activity is optimized, a compact hydrogen-bond network is formed through the combined action of anions and cations, and the absorption performance of ammonia gas is improved. Meanwhile, ortho-hydroxyl and carboxyl form a space barrier, electrostatic interaction sites are reduced, absorption of H2 and N2 is indirectly inhibited, and the selectivity of ammonia gas is improved. The ionic liquid is prepared by adopting a full-atom one-step synthesis method, has the advantages of simplicity and convenience in operation, mild conditions, no need of a solvent or a diluent, high yield, environment friendliness and the like, can be recycled and regenerated, and is easy to realize industrial production.

The invention relates to the technical field of synthesis ammonia production, and discloses an efficient ammonia absorption system in a synthesis ammonia process and a control method thereof. The efficient ammonia absorption system comprises a pretreatment device, a primary absorption tower, a secondary absorption tower, a desorption tower and an intelligent control device which are connected in sequence, the pretreatment device is used for removing impurities and moisture in the ammonia-containing gas; the first-stage absorption tower and the second-stage absorption tower absorb ammonia gas by spraying absorption liquid, and the absorption liquid of the second-stage absorption tower can flow back to the first-stage absorption tower; the desorption tower desorbs the absorption liquid to recover ammonia gas, and the desorption liquid is recycled; the intelligent control device monitors and adjusts system parameters in real time. According to the control method of the system, automatic and accurate control over the ammonia absorption process is achieved, hysteresis and instability of manual operation are avoided, real-time response can be achieved according to changes of the gas inlet working conditions, it is ensured that the ammonia absorption efficiency stably reaches the standard, meanwhile, waste of energy and absorption liquid is avoided by adjusting the spraying amount and the heating power according to needs, and the energy-saving and environment-friendly effects are achieved. And the system operation cost is reduced.

Systems and methods for ammonia synthesis integrating an ammonia absorption refrigeration cycle and an ammonia synthesis cycle. The ammonia synthesis cycle includes a multistage non-adiabatic reactor system formed of multiple non-adiabatic reactors for converting a synthesis gas containing hydrogen and nitrogen into ammonia. The ammonia is chilled and stored as a cold ammonia product. Lean solution from the ammonia absorption refrigeration cycle can be used as a heat exchange utility fluid for the reactors, and the refrigeration cycle can also be used to chill the ammonia from the synthesis cycle for cold storage. Almost all of the syngas is converted in a single pass through the multistage non-adiabatic reactor system, eliminating the need for recycle streams and associated energy consumption.

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 invention discloses ammonia assimilation arthrobacter arylalani and application of the ammonia assimilation arthrobacter arylalani in aquaculture water treatment, and relates to the technical field of wastewater treatment, the ammonia assimilation arthrobacter arylalani is arthrobacter arylalani Aa01 and is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation number is CGMCC No.36829, and the preservation date is December 01, 2025. The invention also discloses application of the ammonia assimilation arthrobacter ashlii in aquaculture water treatment. The ammonia assimilation arthrobacter arabilis Aa01 provided by the invention is a microbial strain with remarkable characteristics and application value, the strain has the most remarkable characteristic of a unique nitrogen conversion mechanism, NH4 < + >-N, NO2 <->-N and NO3 <->-N can be efficiently used as electron acceptors for respiration under an aerobic condition, and the dependence of a traditional denitrification process on an anaerobic environment is broken through; compared with a conventional biological denitrification strain, the Aa01 strain shows excellent performance advantages.

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.

The invention belongs to the technical field of synthesis ammonia production, and particularly relates to a stripping tower condensate treatment process based on synthesis ammonia production. By adopting the novel composite adsorbent and coupling a multi-stage process, the treatment efficiency and the resource recovery rate are synchronously improved. The unique adsorbent can efficiently remove sulfides and carbon dioxide at low temperature, so that the pretreatment effect is ensured to be stable and reach the standard, and a good foundation is laid for subsequent steps. The process realizes efficient cyclic utilization of energy and substances. In the process, waste heat of condensate is recycled to preheat desalted water, energy consumption of the system is reduced, pollutant ammonia is converted into an ammonium bicarbonate product with economic value through multi-stage ammonia absorption and carbonization steps, and waste is turned into wealth. Moreover, by integrating an advanced treatment unit, especially a reverse osmosis process, the final effluent quality can meet the harsh desalted water standard, so that a complete recycling closed loop is formed, and the consumption of fresh water and the discharge of wastewater are remarkably reduced.

Systems and methods for ammonia synthesis integrating an ammonia absorption refrigeration cycle and an ammonia synthesis cycle. The ammonia synthesis cycle includes a multistage non-adiabatic reactor system formed of multiple non-adiabatic reactors for converting a synthesis gas containing hydrogen and nitrogen into ammonia. The ammonia is chilled and stored as a cold ammonia product. Lean solution from the ammonia absorption refrigeration cycle can be used as a heat exchange utility fluid for the reactors, and the refrigeration cycle can also be used to chill the ammonia from the synthesis cycle for cold storage. Almost all of the syngas is converted in a single pass through the multistage non-adiabatic reactor system, eliminating the need for recycle streams and associated energy consumption.

The invention discloses a system and a preparation process for synthesizing ammonia and ammonia water. The system comprises a raw material gas pretreatment unit, an ammonia synthesis reaction unit, a three-stage gradient absorption unit, a tail gas circulation unit and an ammonia water preparation unit. The invention aims to solve the problems of low ammonia absorption efficiency, insufficient product purity, high energy consumption and the like in the existing working section. The composite catalyst is combined with a gradient cooling absorption system, and synthesis ammonia reaction conditions and an ammonia water preparation process are optimized, so that the synthesis rate in a synthesis ammonia stage is improved by 27-59%, the absorption efficiency in an ammonia water preparation stage is improved by 54-59%, the purity of an ammonia water product reaches 99.5% or above, meanwhile, the overall comprehensive energy consumption is reduced by 30% or above, and the method has remarkable economic and environmental benefits and is suitable for industrial production. The method is suitable for large-scale industrial production.

The invention discloses a method for reducing nitrogen loss in an organic solid waste composting process and promoting decomposition by jointly applying an ammonia assimilation functional complex microbial inoculant and ferroferric oxide. And the complex microbial inoculant is prepared from the following raw materials: Heidrikella ginseng, bacillus licheniformis, thermophilic aerophilic thiamine bacillus and bacillus smith. The complex microbial inoculant and ferroferric oxide are jointly applied to composting, so that the nitrogen loss is reduced by 53.5% compared with that of a control group without addition of the complex microbial inoculant, and the huang-rich ratio is increased by 69.2%. The method has the beneficial effects that ferroferric oxide efficiently adsorbs and fixes free ammonium ions to provide a carrier and iron nutrition for microorganisms, activates a decomposing key enzyme, potentially promotes electron transfer and the like, and cooperates with an ammonia assimilation functional complex microbial inoculant; the challenges of difficult colonization, poor environmental adaptability, insufficient capability of coping with instantaneous high ammonia load, single function and the like of an exogenous microbial agent in composting are effectively overcome, so that efficient nitrogen preservation and humification process reinforcement in the composting process are synchronously achieved.