23 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 present application belongs to the technical field of microbial denitrification, and particularly relates to a method for improving the denitrification performance of biological bacteria. The biological bacteria are cultured in an environment containing carbon quantum dots, inorganic salts, a carbon source and a nitrogen source at 28 DEG C to 32 DEG C for 10 h to 16 h. The addition of 4 mu g / L to 6 mu g / L of carbon quantum dots can significantly improve the activity of heterotrophic ammonia assimilation and aerobic denitrification bacteria, increase the heterotrophic ammonia assimilation efficiency by 27.6%, increase the aerobic denitrification efficiency by 23.08%, and improve the denitrification efficiency.

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.

To efficiently absorb ammonia into an absorption liquid while suppressing an increase in the amount of the absorption liquid and an increase in the size of an apparatus.SOLUTION: The ammonia-detoxifying system is provided with a first dilution treatment device comprising: a first tank that retains an absorption liquid capable of absorbing ammonia; a gas introduction unit that introduces, into the first tank, an ammonia-containing gas to be detoxified; a bubble generation unit that generates bubbles in the absorption liquid by using the gas to be detoxified introduced by the gas introduction unit so as to generate, in the absorption liquid, a rising flow generated due to rise of the bubbles; a bubble micronization unit that is provided above the bubble generation unit and micronizes the bubbles; and a first gas discharge line that discharges a gas from a gas phase in the first tank to the outside of the first tank.SELECTED DRAWING: Figure 1

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 provides an ammonia refrigeration and ammonia recovery coupled ammonia separation process which comprises the following steps: condensing product gas obtained in an ammonia synthesis process through an ammonia cooler, separating ammonia to obtain liquid ammonia, and inputting the liquid ammonia into a liquid ammonia receiving tank; part of liquid ammonia in the liquid ammonia receiving tank serves as a refrigerant to be input into the ammonia cooler to be subjected to heat exchange with product gas to generate gas ammonia, the gas ammonia is input into an ammonia absorption device to be absorbed by a lean working medium, and an ammonia-rich working medium is obtained; after the ammonia-rich working medium is heated by a low-grade heat source, ammonia is separated from an ammonia desorption device, and the ammonia is condensed and then input into the liquid ammonia receiving tank; the other part of liquid ammonia in the liquid ammonia receiving tank is extracted as an ammonia product; wherein the working medium is an ammonia solution containing calcium chloride, sodium thiocyanate and sodium tripolyphosphate. Compared with a traditional condensation method for ammonia separation, one ammonia cooler is omitted, a solvent desorption device does not need to be arranged, ammonia can be separated from the rich working medium only through a low-grade heat source, equipment investment is saved, the technological process is simplified, and energy consumption is remarkably reduced.

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 invention provides an ammonia separation process for ammonia synthesis and an ammonia synthesis process. According to the process, product gas obtained by ammonia synthesis exchanges heat with ammonia synthesis gas and then is input into an ammonia separation process; in the ammonia separation process, a lean working medium absorbs ammonia in the product gas to obtain a rich working medium, and residual gas after ammonia absorption is mixed with ammonia synthesis gas for recycling; an ammonia product is output after the rich working medium passes through a hydraulic turbine, flash evaporation and desorption processes, and an obtained lean working medium is returned to the ammonia separation process; wherein the working medium is an ammonia solution containing calcium chloride, sodium thiocyanate and sodium tripolyphosphate. According to the invention, a special working medium is adopted to absorb separated ammonia and desorb the output ammonia product, so that the separation of ammonia in the synthesis ammonia product gas is realized, the process flow is simplified, and the energy consumption is obviously reduced; the residual pressure in the ammonia synthesis process is fully utilized for power generation, heat in the technological process is fully recycled, and the energy utilization efficiency is high.

The invention discloses a treatment method of ammonia absorption liquid in a 3-methylpyridine preparation process, and belongs to the field of 3-methylpyridine production. The treatment method comprises a low-temperature steam stripping section and a pervaporation membrane separation section, in the low-temperature steam stripping section, ammonia absorption liquid is fed into an ammonia stripping tower and subjected to low-temperature steam stripping through water vapor, the steam stripping temperature is 60-80 DEG C, separated ammonia gas is fed into a catalytic synthesis section to be recycled, and feed liquid containing pyridine, 3-methylpyridine and water enters the pervaporation membrane separation section; in the pervaporation membrane separation section, feed liquid is sent to a vaporization membrane separator for dehydration treatment, water vapor is sent to the ammonia absorption section for recycling, retentate containing pyridine and 3-methylpyridine is sent to the rectification section as a target crude material product, and the vaporization membrane separator adopts a metal catalyst loaded sulfonated modified polyphenylene sulfide membrane. Compared with the prior art, the treatment method disclosed by the invention has the characteristics of high separation efficiency, environment friendliness and the like, and has good popularization and application values.

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 application discloses an ammonia-alcohol separation device, which comprises, from top to bottom, a methanol absorption section, a methanol condensation and extraction section, an ammonia absorption section and an ammonia absorption raw material preparation section. The methanol absorption section absorbs methanol in gas through desalted water, the methanol condensation and extraction section sends the extracted methanol to a dimethyl oxalate synthesis device, and the ammonia absorption section absorbs ammonia in gas through a methanol solution of dimethyl oxalate. The ammonia-alcohol separation device further comprises a dimethyl oxalate rectification device and an oxamide synthesis device. The chemical reaction in the oxamide production process is used to replace the rectification and washing processes in the prior art, so that the complete conversion of ammonia is realized, methanol is internally circulated in the dimethyl oxalate synthesis and oxamide co-production device, and the low-level thermal energy of dimethyl oxalate is effectively utilized. The application further discloses a dimethyl oxalate and oxamide co-production method using the ammonia-alcohol separation device.

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 discloses an application method of a three-step nitrogen conservation synergistic compost product in contaminated soil remediation, and belongs to the technical field of organic waste compost fermentation. Aiming at the problems of difficulty in low-temperature starting, long fermentation period, serious greenhouse gas emission and serious nitrogen loss in the existing composting technology, a temperature-control time-sharing inoculation technology is adopted: a low-temperature-resistant lignocellulose degrading bacterium LDT1 is added in a low-temperature starting period to realize quick starting at 10-15 DEG C; a multi-element synergistic emission reduction system composed of zeolite, calcium superphosphate and ferrous sulfate is added in the high-temperature stable period; an alkali-resistant ammonia assimilation strain JS2 is added in the nitrogen retention period, and free ammonia nitrogen is converted into mycoprotein. According to the method, the composting period is shortened from 90-270 days to 30-40 days, the NH3 emission amount is reduced by 70-76%, the N2O emission amount is reduced by 35-45%, the CO2 emission amount is reduced by 45-55%, the ammonia nitrogen content is increased by 3-5 times compared with that of a traditional method, and collaborative optimization of degradation, emission reduction and nitrogen conservation is achieved.

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.