412 results about "Ammonia gas" patented technology

The application provides a preparation method of a zeolite adsorbent, comprising the following steps: a) treating a zeolite in an oxalic acid solution, and drying to obtain a zeolite precursor; b) treating the zeolite precursor obtained in the step a) in an ammonium fluoride solution, and drying to obtain a zeolite adsorbent. The application also provides a zeolite adsorbent and an ammonia adsorption method. The preparation method provided by the application is mild and controllable in structure adjustment, and the zeolite is post-treated to make the zeolite framework selectively rearrange or slightly adjust in local areas, so that mesoporous channels with appropriate sizes and good connectivity are generated. The preparation method provided by the application can introduce mesopores while maintaining the integrity of the microporous framework structure as much as possible, avoids damage to the micropores or collapse of the framework, and has the characteristics of simple process route, wide range of control parameters, good repeatability and suitability for large-scale preparation.

This utility model discloses a ternary precursor material mother liquor ammonia removal treatment system, including an ammonia removal tower, a falling film evaporator, a dilute ammonia water tank, a condenser, and an ammonia water storage tank. The top of the ammonia removal tower is connected to the shell side of the falling film evaporator section via an ammonia gas outlet pipe, and the bottom of the ammonia removal tower is connected to the gas-liquid separation section via a liquid outlet pipe. The shell side of the falling film evaporator section is connected to the cooling inlet end of the condenser via an ammonia gas outlet pipe, and the cooling outlet end of the condenser is connected to the ammonia water storage tank. A dilute ammonia water inlet pipe and a reflux pipe are connected between the shell side of the falling film evaporator section and the top of the dilute ammonia water tank. A liquid outlet pipe is connected to the gas-liquid separation section. A reflux pipe and a falling film circulation pump are connected between the liquid outlet pipe and the top of the tube side of the falling film evaporator section. A vapor compression unit is provided between the gas-liquid separation section and the ammonia removal tower. This utility model has the advantages of reducing the amount of vapor used in the ammonia removal tower, reducing energy consumption, achieving good ammonia removal effect from the mother liquor, achieving good ammonia water recovery effect, low system operating cost, and stable and reliable operation.

The application relates to the technical field of high polymer materials, in particular to ammonia-removing and humidity-controlling water gel as well as a preparation method and application thereof, which comprises the following raw materials: deionized water, AM, MBA, Gly, lithium chloride, 2-hydroxy-2-methyl propiophenone, magnesium chloride or magnesium oxide; the AM and the MBA are added into the deionized water, and polymerization is initiated by 2-hydroxy-2-methyl propiophenone and ultraviolet light to form a polyacrylamide network, so that the novel water gel can stably control humidity and effectively remove ammonia in long-term storage, effectively adsorb ammonia and provide molecular-level water molecules, and the required humidity of a cigar is maintained; secondly, the MBA is added into the water gel to form a more stable and porous three-dimensional crosslinking network, which can not only adjust the moisture absorption / relaxation rate of the water gel, realize humidity buffering, but also adsorb ammonia molecules through acid-base neutralization, ion exchange, hydrogen bonding, electrostatic interaction, so that the water gel can maintain the required humidity of the cigar for a long time and reduce the volatilization of ammonia.

The present application relates to the field of combustion equipment, disclose a kind of regenerative ammonia combustor and combustion system, wherein, regenerative ammonia combustor includes: regenerative box, inside is provided with regenerative flow passage, regenerative flow passage is filled with regenerator, regenerative box outside is provided with exhaust gas interface and combustion gas interface;Combustion shell, inside is provided with transfer chamber and gas outlet flow passage, transfer chamber is close to the end of gas outlet flow passage and is provided with shunt groove, the end of transfer chamber away from gas outlet flow passage is provided with inlet pipe, inlet pipe extends to shunt groove, multiple premix flow passages are arranged between transfer chamber and gas outlet flow passage in combustion shell, multiple premix flow passages and the side wall between shunt groove are respectively provided with communication hole, gas flow passage is arranged between the side of transfer chamber and the other end of regenerative flow passage in combustion shell;Ignition denitration integrated gun is inserted into gas outlet flow passage, the present application can improve the ignition and combustion stability of ammonia, and reduce the emission of ammonia, nitrogen oxides and other pollutants while recycling flue gas waste heat.

The utility model provides a kind of based on high -efficient energy -conserving ammonia air mixer of urea hydrolysis preparation ammonia, it is related to ammonia air mixer equipment technical field. Including mixer cylinder, the one end of mixer cylinder is equipped with dilution air import, by the utility model is equipped with dilution air import, mixer cylinder and ammonia gas import cooperation use, practical simple, installation is convenient;The utility model is equipped with spiral blade and center cylinder, constitutes perfect cyclone device, utilizes rotating flow field, increases the mixing time of ammonia gas and air, makes air and ammonia gas fully mix, to improve mixing efficiency;The cyclone device of the utility model can rapidly reach the purpose of uniform mixing in very short distance, improve the flexibility when using equipment, first locating bolt is circular ring and equidistant distribution in the periphery of first air inlet cavity, auxiliary multiple mixer cylinder is connected and used, overall structure is not used power equipment auxiliary operation, saves the overall installation use cost.

The application discloses a catalyst for preparing malononitrile, a preparation method of the catalyst and a method for preparing malononitrile by using the catalyst. The catalyst is a solid catalyst, which is an acidic catalyst loaded with rare earth metal oxide. The method for preparing malononitrile is that cyanoacetic acid or cyanoacetate or cyanoacetamide and an ammonia source are subjected to ammoniation dehydration reaction in a continuous reactor to prepare malononitrile according to a certain molar ratio. Then, vacuum distillation (20 torr-25 torr) is carried out, and a fraction collected at 110 DEG C-120 DEG C is malononitrile product. The ammonia source can be ammonia gas, ammonia water, ammonium carbonate or urea. The method for preparing malononitrile can reduce production cost, improve production safety, reduce the discharge amount of three wastes in the preparation of malononitrile by using an existing process, and improve product quality, and is a sustainable and green synthesis route.

The utility model relates to the technical field of condensation recovery, and discloses a condensation recovery device of a nitriding furnace distillation retort, which comprises a reaction furnace with an open bottom and fixed in the air, a sealing bottom cover arranged right below the reaction furnace, a lifting module arranged below the sealing bottom cover, and a uniform air supply structure arranged in the reaction furnace, ammonia gas, hydrogen and other gases are respectively fed into the reaction furnace through the uniform air supply structure; the condensation shunting structure comprises a condensation chamber, is arranged above the reaction furnace and is connected with the reaction furnace through an exhaust pipe, waste gas is converted into hydrogen and ammonia water through the condensation shunting structure, and the hydrogen is recycled; the decomposition and diversion structure comprises a decomposition chamber arranged on one side of the reaction furnace, the top of the decomposition chamber is connected with the condensation chamber through a flow guide pipe, ammonia water is decomposed into ammonia gas and water in the decomposition chamber, and the ammonia gas is recycled. Compared with the prior art, the device disclosed by the utility model has the advantages that the condensation shunting structure is arranged, so that waste gas can be condensed, ammonia water is prevented from flowing back, and hydrogen and ammonia gas are recycled.

The application discloses an ammonia-hydrogen internal combustion engine knock suppression system and a knock suppression method, and belongs to the technical field of internal combustion engine combustion control. The suppression system comprises an ammonia gas supply unit, a hydrogen gas supply unit, a cylinder pressure sensor, a pressure sensor and an electronic control unit. The ammonia gas supply unit realizes ammonia gas supply in a cylinder. The hydrogen gas supply unit realizes hydrogen gas supply in the cylinder. The cylinder pressure sensor is used for monitoring the pressure in the cylinder in real time and calculating CA50. The pressure sensor is used for monitoring the knock intensity of the cylinder. The electronic control unit is electrically connected with the ammonia gas supply unit, the hydrogen gas supply unit, the cylinder pressure sensor and the pressure sensor respectively, is used for receiving sensor signals, calculating ammonia energy (AER) and knock intensity (KI), controlling the ignition time and dynamically adjusting the ammonia mixing ratio, realizing the collaborative optimization of knock suppression and thermal efficiency, and achieving the win-win effect of "knock suppression" and "efficiency increase".

This invention relates to the field of organic synthesis technology and discloses a method and system for preparing adiponitrile. The method includes: S1: atomizing molten adipic acid and mixing it with ammonia gas, followed by an ammoniation reaction to generate an ammoniation product; S2: dividing the ammoniation product into two parts, a and b. Part a undergoes a countercurrent, non-contact heat exchange with hot material to generate crude adiponitrile through heating and dehydration, while part b is recycled back to step S1 to participate in the reaction. The ratio of the ammoniation product in part a to that in part b is (1~5):1. The temperature of the hot material is higher than the temperature of the ammoniation product in part a. This invention improves the efficiency of the ammoniation reaction, reduces the decomposition side reactions of adipic acid and the residue of adipic acid, and significantly improves the conversion rate of the dehydration reaction and the selectivity of adiponitrile.

This ammonia synthesis system comprises: a catalytic reactor which accommodates a catalyst and synthesizes ammonia from hydrogen and nitrogen; a separator which separates an ammonia-containing synthesis gas taken out from the catalytic reactor into ammonia and an unreacted gas that contains hydrogen and nitrogen; a supply line which supplies a raw material gas to the catalytic reactor, wherein the raw material gas contains a recycle gas that is at least a portion of the unreacted gas, raw material hydrogen that is supplied from a hydrogen supply source, and raw material nitrogen that is supplied from a nitrogen supply source; and a control unit which controls the ratio of the hydrogen flow rate to the nitrogen flow rate in the supply line.

The utility model discloses a kind of ammonia mixed combustion's cyclone combustor. Among them, cyclone combustor includes: first shell, with combustion chamber intercommunication;Center primary air pipe, setting in first shell, center primary air pipe with combustion chamber intercommunication;First grade ammonia gas passage, setting in center primary air pipe;Secondary air duct, with first shell intercommunication, and secondary air duct with combustion chamber intercommunication;Second grade ammonia gas passage, with first shell intercommunication, and second grade ammonia gas passage outer sleeve in secondary air duct outside. Such setting can reduce the emission of carbon dioxide and other harmful substances, with lower carbon emission and higher combustion efficiency;While it can also reduce the emission of furnace outlet nitrogen oxides, protect environmental quality.

This invention relates to the field of ferrous metallurgy technology and discloses a method for the reduction production of high-purity, low-oxygen-content sponge iron. The method includes: feeding pellets and reducing materials into a rotary kiln for preheating and forming a metallic iron shell on the surface; pulse-injecting a composite reducing liquid into a high-temperature solid-phase bed in a deep reduction zone; using a rotary encoder for feedback to perform dynamic phase-controlled injection, achieving gas-liquid linkage control and nitrogen cooling maintenance; and collecting the finished product through end-stage homogenization, cooling, and magnetic separation. Ammonia gas generated by the pyrolysis of the composite reducing liquid penetrates the metal layer for deep reduction, and a chemical shielding layer is constructed using boron-carbon bonds formed on the microporous surface of the iron matrix. This invention effectively improves the metallization rate of sponge iron, significantly inhibits secondary oxidation of the finished product during kiln exit and storage, and solves the technical problem of high and unstable residual oxygen content in sponge iron.

The present application discloses a kind of sewage pipe network dredging sludge treatment device, and the present application relates to sludge treatment technical field.The sewage pipe network dredging sludge treatment device, by being provided with first processing box, first motor, heating wire stirring shaft, scraper and stirring rod, the function of treating sludge is realized, heating wire in first processing box directly heats sludge, cooperates with the continuous overturning of stirring shaft and stirring rod, effectively prevent sludge accumulation and caking, improve drying uniformity, scraper rotates with stirring shaft, real-time remove the sludge adhered to the inner wall of box, avoid long-term scale influence heat transfer efficiency;By being provided with second processing box, first connecting pipe, condenser pipe, activated carbon plate and drying plate, the function of treating water vapor and gas generated in drying process is realized, after gas is condensed, residual moisture is absorbed by drying plate, ensure that emission gas is dry, activated carbon plate absorbs hydrogen sulfide, ammonia and other odor components in gas, avoid secondary pollution.

This application relates to the field of separation equipment technology, specifically disclosing an ammonia separator for the safe production of synthetic ammonia from natural gas. The separator includes a tank, an inlet pipe, a drain pipe, an exhaust pipe, and a wire mesh demister. The inlet pipe connects to the circumference of the tank, the drain pipe connects to the bottom of the tank, and the exhaust pipe connects to the top of the tank. The wire mesh demister is installed inside the exhaust pipe. From the inlet end, a pulse elimination component, a forced voltage stabilization component, and a rectification component are sequentially installed on the inlet pipe. This application improves the separation efficiency and stability of the ammonia separator and reduces mist entrainment and droplet backmixing.

When etching a silicon oxide film formed on a substrate, the shape of the silicon oxide film after etching is to be as desired. [Solution] The etching method of the present disclosure includes an etching step of etching a silicon oxide film formed on a substrate on which a silicon oxide film is formed on the surface by supplying a halogen-containing gas, ammonia gas, and an amine gas as etching gases.

The application discloses a kind of suitable for SCR denitration ammonia injection device and device, including ammonia injection pipe and the ammonia injection port of setting at ammonia injection pipe end, ammonia injection pipe includes ammonia main pipeline, branch pipeline and branch pipeline;Along ammonia main pipeline circumferential direction, equidistantly there are several branch pipelines;In branch pipeline, equidistantly and parallelly there are several vertical branch pipeline branch pipelines;Several branch pipelines are in the same plane, plane vertical branch pipeline;In branch pipeline, there is vertical plane ammonia injection port;Ammonia injection port gas outlet direction is same with ammonia main pipeline inner gas flow direction.The ammonia injection device suitable for SCR denitration designed in the application, including branch pipeline and branch pipeline, ammonia injection pipeline because each part branch pipe length is small, and the difference of branch pipeline diameter is not big, so it can reduce the flow resistance of ammonia in pipeline.

This application discloses a process for improving the yield of HCN prepared by the Andruse process, belonging to the field of HCN preparation technology. This application utilizes the tail gas after HCN removal and dehydration reactions, using residual methane in the tail gas to increase methane conversion, using CO in the tail gas to inhibit methane decomposition and improve methane selectivity, and using H2 in the tail gas, with H2 combustion providing heat instead of the heat provided by methane decomposition. This improves the conversion rate of methane to HCN, increases the overall reaction yield, and eliminates ammonia residue in the post-reaction gas, saving the ammonia removal step. Simultaneously, it reduces air consumption and increases the ratio of ammonia to methane to oxygen, allowing the reaction to proceed far from the explosion zone, thus improving process safety.

The application provides an ultramicroporous zinc-based MOF material, a preparation method thereof and application thereof in ammonia adsorption, and belongs to the technical field of crystalline materials. The material is an ultramicroporous zinc-based metal organic framework material with a three-dimensional periodic network structure, which is formed by coordination self-assembly of Zn 2+ ions, squarate ligands and triazoles ligands, wherein Zn 2+ ions exist in two coordination modes of hexa-coordinated octahedron and tetra-coordinated tetrahedron; the molecular formula of the material is [Zn2(C4O4)(C2H2N3)2], wherein C4O4 2‑ is a squarate ligand, and C2H2N3 ‑ is a triazole ligand. The application also provides application of the ultramicroporous zinc-based MOF material in ammonia adsorption. The MOF material has good stability, can maintain the integrity of the framework structure after being soaked in water for 7 days, and has good ammonia adsorption performance.

The application relates to the technical field of agricultural analysis and detection, and discloses a multi-union type fertilizer synergist urease activity automatic detection and analysis system, which comprises a physical execution layer and an intelligent control layer. The physical execution layer is configured with a reaction generation module, a gas transmission and conditioning module and a detection and regeneration module which are connected in sequence in a gas path, is used for constructing a closed loop flow path and executing ammonia gas absorption and titration. The intelligent control layer controls the gas transmission and conditioning module to switch the gas path according to an adaptive time sequence, constructs an intermittent absorption environment, executes static titration and resets trace acid liquid under the condition of maintaining a bypass state, and simultaneously uses system lag parameters to perform dynamic deconvolution reconstruction on discrete titration data collected, so as to restore a continuous reaction rate curve. Through the combination of hardware time sequence control and algorithm correction, the application eliminates the influence of physical transmission delay on the signal phase, and improves the detection precision and efficiency of the dynamic change of urease activity.

A multiply redundant safety system that protects humans and assets while transfer(s) / fuelling of on road / off road, rail, marine, aircraft, spacecraft, rockets, and all other vehicles / vessels utilizing Compressed and or Liquefied Gas Fuels / compound(s). Utilizing Natural Gas Chemical Family of Hydrogen / Propane / ethane / ammonia / and any mixtures along with or with out oxidizer(s), such as Liquefied Oxygen, Oxygen Triplet (O3) / ozone / hydrogen peroxide / peroxide / solid oxidizer(s) one or more processors, utilizing Artificial Intelligence techniques / machine learning in combination with one or more sensors; in combination with one or more micro switches / actuator(s) combine to detect any leaks / fire(s) / or explosion hazards / vehicle motion / arc's, spark(s) / and other hazards for quickly mitigating / locking out / stopping fueling / gas / transfers / vehicle releasing system(s).

This utility model relates to the field of ammonia injection grid technology for denitrification reactors, and more particularly to an ammonia injection grid for flue gas denitrification, comprising multiple horizontal blowing branch pipes and vertical blowing branch pipes; wherein each of the multiple horizontal blowing branch pipes is vertically connected to a first horizontal connecting pipe; each of the multiple vertical blowing branch pipes is vertically connected to a second horizontal connecting pipe; multiple vertical blowing nozzles are evenly spaced on the vertical blowing branch pipes; each vertical blowing nozzle includes a jet pipe that is vertically connected to the vertical blowing branch pipe and parallel to the exhaust gas flow direction, and a gas distribution cone disposed at the gas outlet of the jet pipe. In this utility model, the horizontal blowing nozzles of the horizontal blowing branch pipes form a contact and mixing with the flue gas in the vertical direction; in addition, the vertical blowing nozzles on the vertical blowing branch pipes form a circulating ammonia gas, thereby increasing the jet state of the ammonia gas, thus fully contacting and reacting with the flue gas, which can shorten the mixing distance and improve the mixing uniformity compared with the prior art.

This invention discloses a purification process for urea production tail gas, belonging to the field of urea production technology. This invention addresses the technical problems of low conversion rate and high ammonia content in exhaust gas during existing urea production processes, resulting in environmental pollution. The purification process for urea production tail gas includes the following steps: S1, carbon dioxide gas at the top of the stripping tower and liquid ammonia at the bottom of the stripping tower are contacted countercurrently to generate ammonium carbamate stripping gas; S2, the ammonium carbamate stripping gas and the mixed gas enter a synthesis tower, where they are condensed at the bottom to synthesize ammonium carbamate liquid; S3, the mixed gas is transferred via a side stream to a reflux condenser equipped with a modified filter membrane for adsorption and purification. The esterification product of 4-pentenoic acid and dextran is used as the polymer matrix; polyvinyl alcohol, propane trimethylol acrylate, and sodium styrene sulfonate are copolymerized to form a primary polymer solution. The primary polymer solution is used to modify the polymer matrix, resulting in the prepared modified filter membrane.

A dual-premixed ammonia burner relates to the field of ammonia combustion equipment. Addressing the problems of high ignition energy, slow combustion speed, poor flame stability, and difficulty in achieving stable combustion in large proportions with ammonia, this invention employs a dual premixing structure of auxiliary fuel gas premixed with ammonia and air premixed with ammonia, combined with a three-stage coaxial air duct and a regenerative pre-combustion chamber to achieve stable combustion. The burner includes an ignition gun, a primary air regulating damper, a secondary air regulating damper, a volute-shaped air casing, a primary air annular duct, swirl vanes, an annular ammonia multi-nozzle header, a pre-combustion chamber, a tertiary air multi-nozzle annular pipe, a flame monitor, and dual ammonia and auxiliary fuel inlets. This invention allows for wide load adjustment from 30% to 100%, no flameout at low loads, high burnout rate, and low nitrogen oxide emissions. It can operate with a large proportion of ammonia or pure gas, features a reasonable structure, reliable ignition, and stable safety, and is suitable for zero-carbon retrofitting and efficient utilization of green ammonia in industrial boilers, kilns, and other thermal equipment.

The application discloses a method for chemical chain ammonia decomposition, specifically comprising the following steps: a. ammonia gas is contacted with alkali metal M to obtain an amino compound, and the amino compound is ball milled with a catalyst to obtain a material body; b. the material body is placed in a sealed container under a non-active atmosphere, and is decomposed to obtain nitrogen, hydrogen and regenerated alkali metal. The method provided by the application can carry out ammonia decomposition at low temperature, the reaction condition is mild, the process is easy to control, is not only suitable for small-scale and distributed ammonia decomposition for hydrogen production, but also can take the amino compound as a solid ammonia carrier, and transportation is convenient.

The utility model relates to the field of boiler denitration atomizing spray gun, especially to a furnace SNCR denitration spray head, aim at overcoming the technical problem that because of adopting the mixed cavity premixing mode in the related technology, the high pressure atomized material in the mixed cavity forms back pressure to the low pressure ammonia gas, thereby hindering the ammonia gas from entering the mixed cavity, and further making the ammonia gas unable to be smoothly sprayed. The furnace SNCR denitration spray head is provided with ammonia gas jet and atomized material jet which are respectively sprayed to the flow cone and flow to the spray hole along the flow cone. The negative pressure area formed by the impact position of high-speed atomized material jet on the flow cone is used to suck the ammonia gas jet into the atomized material jet for mixing and spraying together, without the need of mixed cavity premixing, avoiding the generation of back pressure, thereby improving the denitration effect. The technical problem that the existing denitration spray head adopts the mixed cavity premixing mode, the high pressure atomized material in the mixed cavity forms back pressure to the low pressure ammonia gas, thereby hindering the ammonia gas from entering the mixed cavity, and further making the ammonia gas unable to be smoothly sprayed is overcome.

This invention discloses a control system for an intelligent inspection robot for stormwater and sewage pipelines, comprising a microcontroller unit, a multi-sensor module, an image acquisition module, a communication module, and a power module. Through multi-sensor collaborative perception and intelligent decision-making mechanisms, it integrates multi-dimensional data such as images, distance, and environmental data, and employs adaptive path planning and obstacle avoidance algorithms, making it suitable for autonomous inspection tasks in complex pipeline environments. The image acquisition module integrates a high-definition camera and a WiFi module; the distance detection unit combines ultrasonic and infrared ranging sensors to achieve complementary ranging and improve detection accuracy; the environmental monitoring unit uses gas sensors to detect the concentration of toxic and flammable gases such as ammonia and sulfides in the pipeline in real time, and automatically triggers an early warning when the concentration exceeds the standard. This effectively solves the problems of existing pipeline robots, such as single sensor detection methods, poor environmental adaptability, and insufficient intelligence, improving inspection efficiency and system reliability, and reducing manual maintenance costs.

The utility model relates to SCR denitration reaction equipment technical field, concretely for modularization low temperature SCR denitration reactor suite, including a plurality of reaction module, reaction module between sequentially series connection forms a reactor group, the upper portion of reactor group is provided with ammonia gas delivery pipe, ammonia gas delivery pipe passes through a plurality of shunt pipe and delivers ammonia gas to every reaction module, and the bottom of every reaction module is installed for collecting reaction dust's dust collecting bin, and reaction module includes for ammonia gas and ammonia gas mixed mixing bin and for mixed gas carries out catalytic reaction's reaction bin. The modularization low temperature SCR denitration reactor suite, from the modularization design, multiple reaction modules sequentially series connection constitutes reactor group, and this kind of modularization structure greatly promoted the flexibility of equipment application. Enterprise can increase and decrease reaction module number according to actual flue gas processing capacity, working condition changes, and conveniently, quickly adjusts reactor scale, effectively solved the problem that prior art cannot flexibly cope with complex working condition.