2655 results about "Ammonia gas" patented technology

An aluminum ash pickling device, which relates to the technical field of pickling devices, and comprises a pickling tower (1); and a filtering mechanism comprises a filter screen (8), a rotating shaft (9), a cleaning brush (10) and a rotating disc (11). By means of the filter screen (8), when an induced draft fan (4) drives waste gas to an air intake pipe (2), the waste gas is filtered by the filter screen (8) before entering the pickling tower (1); and under the action of the induced draft fan (4), wind power generated by the waste gas pushes the rotating disc (11) to drive the rotating shaft (9) to rotate, the rotating shaft (9) drives the cleaning brush (10) to rotate, the cleaning brush (10) agitates dust on a surface of the filter screen (8) during rotation, and at this point, the dust is loosened and comes off the surface of the filter screen (8), thus reducing the probability of the filter screen (8) being blocked, and preventing the circulation of the waste gas from being affected. When the wind power is small, the dust falls downward into a collecting box (12), a rotating cover (14) is rotated to release the connection between the rotating cover (14) and an external thread (13), and at this point, the dust accumulated in the collecting box (12) flows downward, such that a worker can collect the dust, thus preventing a small amount of aluminum ash from entering the pickling tower (1) along with the induced draft fan (4) and mixing with an agent which would otherwise impair the treatment efficiency of ammonia gas.

The invention discloses a precise ammonia spraying system suitable for SNCR denitration, and relates to the technical field of ammonia spraying devices for SNCR denitration, the precise ammonia spraying system comprises a top cover fixedly mounted at the top of a boiler cyclone separator barrel, and a reciprocating pushing mechanism is mounted on the outer wall, located on the outer side of a spray gun, of the boiler cyclone separator barrel; and supporting cylinders which are distributed at equal intervals are fixed on the inner wall, close to the spray gun, of the boiler cyclone separator cylinder body. According to the precise ammonia spraying system suitable for SNCR denitration, the sleeve used for dispersing ammonia sprayed by the spray gun can rapidly rotate and transversely move, dead angles in the spraying process can be reduced, the ammonia is evenly distributed in the boiler cyclone separator barrel, mixing of the ammonia and flue gas is promoted, the working efficiency of the ammonia spraying system is improved, and the service life of the ammonia spraying system is prolonged. Moreover, the sleeve can generate slight vibration during rotation, dust particles in the through holes are vibrated off, the service life of the sleeve is prolonged, meanwhile, gas can be helped to form finer fog drops during spraying, ammonia gas can be better diffused conveniently, and the flue gas reaction efficiency is improved.

The invention discloses a livestock and poultry health state intelligent evaluation method based on multi-sensor fusion and an AI prediction model, and belongs to the technical field of livestock breeding, and the method comprises the following steps: setting multiple types of sensors in a livestock and poultry breeding area, collecting multi-source data such as temperature, humidity, carbon dioxide concentration, ammonia gas concentration, illumination intensity, weight and current, and carrying out the analysis of the data; wherein the weight data is obtained through the weighing platform, and the current data is used for sensing the operation state of drinking, ingestion, ventilation or lighting equipment; various types of sensors such as temperature and humidity sensors, carbon dioxide sensors, ammonia gas sensors, illumination sensors, weight sensors and current sensors are deployed in livestock and poultry breeding areas, all-directional data acquisition of environments and behavior states is realized, and dynamic modeling and feature extraction of key behavior nodes are realized by introducing a deep neural network structure of a gating circulation unit and an attention mechanism.

The invention relates to the field of nitriding furnaces, in particular to an ammonia gas circulating system of a nitriding furnace, which comprises a furnace body, a furnace cover and a gas inlet mechanism, the furnace body is provided with a containing cavity, the furnace cover is connected to the furnace body and covers a cavity opening of the containing cavity, and the gas inlet mechanism comprises a gas inlet main pipe, an annular pipeline, an electromagnetic valve and a detection assembly, one end of the gas inlet main pipe is connected to the outer wall of the annular pipeline, the other end of the gas inlet main pipe is used for being connected with an external ammonia gas storage mechanism, the electromagnetic valves are connected to the annular pipeline, the other ends of the electromagnetic valves extend into the furnace body, the electromagnetic valves are circumferentially distributed around the axis of the annular pipeline at intervals, and the detection assembly is embedded in the containing cavity to control the electromagnetic valves to be opened and closed. External ammonia gas is conveyed to the annular pipeline through the gas inlet main pipe, then the ammonia gas is input into the furnace body through the multiple electromagnetic valves distributed around the axis of the annular pipeline in the circumferential direction at intervals, meanwhile, the detection assembly controls the electromagnetic valves to be opened and closed through the pressure intensity in the containing cavity, the ammonia gas introduced into the nitriding furnace is evenly distributed to all positions in the nitriding furnace, and the uniform nitriding effect is improved.

The invention discloses a La2O3-ZnO-NiO / ZrO2 oxygen carrier as well as a preparation method and application thereof, and belongs to the technical field of ammonia decomposition. According to the technical scheme, the method comprises the following steps: 1) synthesis of a ZrO2 carrier: adding NH3.H2O into a zirconyl nitrate solution to induce precipitation; 2) preparation of La2O3 / ZrO2: adding lanthanum nitrate hexahydrate and urea to obtain a precipitate, drying the precipitate, and finally calcining the precipitate; 3) preparation of La2O3-ZnO / ZrO2: adding zinc nitrate hexahydrate and urea, standing to obtain a precipitate, drying and calcining; and 4) preparation of La2O3-ZnO-NiO / ZrO2: adding NH3.H2O, then adding nickel acetate and thiourea, reacting, drying, and calcining twice to obtain the target product. Lattice oxygen in the oxygen carrier is used for catalytic oxidation of ammonia decomposition, the oxygen carrier can be recycled for multiple times, and the method is suitable for industrial application in the future.

The invention relates to the technical field of pure ammonia combustors, in particular to a catalytic auxiliary cracking plasma pure ammonia combustor and an operation method thereof. According to the technical scheme, the device comprises catalytic cracking areas, a purification area, a pre-combustion area, a main combustion area, an ammonia supply area and a waste heat system, the catalytic cracking areas are arranged on the two sides of a combustor and comprise an ammonia gas inlet channel and a catalytic reaction area internally provided with a porous medium, and a catalyst fixedly grows on the surface of the porous medium; the purification area is located outside the combustor and connected with an outlet of the catalytic cracking area through a pipeline, and selective separation membranes are arranged at the outlet end and the exhaust end of the purification area respectively; the pre-combustion areas are distributed on the two sides of the main combustion area, comprise air inlet channels and plasma igniters and communicate with an outlet of the purification area. According to the invention, the problems of ignition, stable combustion and low NOx emission of the ammonia fuel are solved, the unification of efficient energy utilization and industrial applicability is realized, and a key technical support is provided for large-scale application of the ammonia alternative fuel in an industrial kiln.

The invention discloses application of sodium tetraphenylborate in carbon sourcing of landfill leachate and a carbon sourcing method and device. According to the invention, sodium tetraphenylborate is used as an ammonia nitrogen removing agent and is added into the percolate sewage of the organic garbage, so that the carbon nitrogen ratio of supernatant liquid is increased, and then the supernatant liquid is used as a carbon source. The basic principle that sodium tetraphenylborate is subjected to a precipitation reaction with ammonia ions in an aqueous solution is utilized, then standing separation is selected according to precipitation properties, and discharged water can be stored as a carbon source or directly added into a water treatment process in the form of the carbon source. The precipitate is collected and dehydrated, the precipitate can be recycled as a precipitant after being heated and recovered by alkali liquor, and the released concentrated ammonia gas is collected and can be used for industrial production. The method has the advantages of high reaction efficiency, low interference degree, high controllability of carbon-nitrogen ratio, recyclable main reagents, low theoretical operation cost, obvious removal effect on chroma of sewage, and high industrial value of discharged carbon-sourced water.

The utility model discloses a hydrogen ammonia coupling low nitrogen burner relates to burner technical field, including first tank and second tank, be equipped with connecting subassembly between the first tank and the second tank, first tank far away from the one end of second tank is fixedly connected with the gas outlet pipe, the gas outlet pipe is communicated with first tank, and the gas outlet pipe is connected with the gas outlet pipe. A combustion assembly is arranged at one end of the gas outlet pipe away from the first tank; through the arrangement of the ammonia gas inlet pipe and the pipe connector, hydrogen and ammonia gas in a specific proportion can be injected into the cavity formed by the first tank body and the second tank body during working, the hydrogen and the ammonia gas are mixed through the premixing assembly and then sprayed out of the nozzle, the combustion temperature can be effectively reduced through the addition of the ammonia gas, NOx generation is reduced, meanwhile, the combustion speed of the ammonia gas is low, and the combustion efficiency is improved. And after the ammonia gas is mixed, the overall combustion speed can be reduced, the combustion stability is improved, so that the combustor has good combustion stability, and meanwhile, the emission of NOx is greatly reduced.

The invention discloses a dual-fuel engine combustion control method based on hydrogen-ammonia energy ratio and gas distribution overlap angle regulation and control, which comprises the following steps: 1) fuel ratio control: acquiring current operation state parameters of an engine, determining a target AER according to preset mapping, regulating ammonia gas supply quantity and hydrogen supply quantity to enable the actual AER to reach the target AER, and controlling the fuel ratio; the AER is adaptively set according to engine load and combustion stability conditions; 2) valve timing control: adjusting the opening time of an intake valve or the closing time of an exhaust valve through a variable valve timing mechanism so as to change a valve timing overlap angle VOA, wherein the VOA is set to be a negative value, a small overlap angle or a positive overlap angle according to the working condition of an engine; (3) injection time sequence optimization is conducted, specifically, the injection time of ammonia gas and the in-cylinder direct injection time of hydrogen are controlled respectively, and coordinated optimization of a fuel injection strategy and valve timing is achieved; and 4) closed-loop steady-state control: monitoring a combustion state and an emission index in real time, comparing the combustion state and the emission index with a threshold value to serve as a feedback signal, and correcting the target AER and VOA settings in time. According to the dual-fuel engine combustion control method based on regulation and control of the hydrogen-ammonia energy ratio and the gas distribution overlapping angle, the energy ratio of hydrogen fuel and ammonia fuel and the overlapping opening angle of an intake valve and an exhaust valve are dynamically adjusted under different working conditions, so that the combustion reaction rate and temperature are coordinated, and the stable and efficient combustion process is achieved; and harmful emissions of NOx, unburned ammonia and the like are obviously reduced.

The utility model discloses an ammonium sulfate wastewater treatment system which comprises an ammonium sulfate wastewater storage pool used for collecting ammonium sulfate wastewater, the calcium hydroxide preparation system is used for preparing a calcium hydroxide solution, an evaporator and a first circulating heater and is used for reacting ammonium sulfate wastewater and calcium hydroxide and heating and evaporating; the first crystallizer and the second circulating heater as well as the second crystallizer and the third circulating heater are used for two times of evaporative crystallization, a final concentrated solution is filtered by the filter and then flows into the mother liquor collecting tank to facilitate wastewater treatment, and evaporated ammonia gas is absorbed by the cooling absorption tower and the condensate collecting tank to form ammonia water; and condensate water of the second heat exchanger, the first circulating heater, the second circulating heater and the third circulating heater also flows back to the condensate collecting pool. According to the wastewater treatment system, ammonium sulfate wastewater and a calcium hydroxide solution are distilled and crystallized, so that calcium sulfate and ammonia water can be recovered, and waste utilization is realized.

The invention discloses a hydrogen-ammonia dual-fuel radial layering micro-mixing combustor which comprises a lower cavity part and an upper cavity part which are coaxially and fixedly arranged and are separated by a middle partition plate in a sealed mode. The lower cavity part is sequentially and coaxially provided with an inner cylinder, a middle cylinder and an outer cylinder from inside to outside to form an inner-stage fuel cavity, a middle-stage air cavity and an outer-stage air cavity; an upper-stage fuel cavity is formed in the upper cavity part; the axial air guide assembly is arranged in the upper cavity part and the lower cavity part in a penetrating mode. By controlling the flow of ammonia fuel introduced into the inner-stage fuel cavity, the flow of air introduced into the middle-stage air cavity, the flow of air introduced into the outer-stage air cavity and the flow of hydrogen fuel introduced into the upper-stage fuel cavity, micro mixing of fuel of the inner-stage nozzle and fuel of the outer-stage nozzle with different mixing concentrations can be achieved, and concentration layering in the radius direction of the nozzle of the combustor is achieved; and a jet flow state that the outer-layer hydrogen-rich or pure hydrogen gas wraps the inner-layer ammonia-poor gas is formed, so that the purposes of strengthening stable combustion of hydrogen-ammonia dual-fuel and ultralow emission are achieved.

The invention provides a sewage steam stripping thermal self-circulation system which is characterized in that a first heat exchanger receives acidic water and is connected with a hot feed inlet of a steam stripping tower through a second heat exchanger, a first gas outlet of the steam stripping tower outputs ammonia gas through the second heat exchanger, and a second gas outlet outputs hydrogen sulfide; a purified water outlet of the stripping tower is respectively connected with a steam reboiler and a purified water inlet of a steam generator, a liquid outlet of the steam reboiler is connected with a condensed water inlet of the steam generator, a purified water outlet of the steam generator outputs purified water through a first heat exchanger, and a steam outlet and a condensed water outlet of the steam generator are connected with a steam compressor. And a steam outlet of the steam compressor is connected with a steam inlet of the steam reboiler. The problem of heat waste of purified water and condensed water can be solved, full utilization of medium-high temperature waste heat is achieved, the heat exchange process of raw material water is improved, the to-be-cooled temperature of the purified water is reduced, and energy loss is reduced.

The utility model discloses a straw mushroom base material aerobic fermentation device which comprises a controller, a temperature and humidity sensor, an ammonia gas detection sensor, a high-temperature steam generator, a combined ventilator, an exhaust fan, an aerobic fermentation chamber, a plurality of goods shelves, a stainless steel humidification pipe and an air return pipe. A plurality of containing frames used for containing straw mushroom base materials are arranged in the goods shelf, the stainless steel humidifying pipe is arranged on the bottom wall of the fermentation space and penetrates through the aerobic fermentation chamber to be communicated with the high-temperature steam generator, so that the high-temperature steam generator provides temperature and humidity for the fermentation space, and the air return pipe is arranged on the top wall of the fermentation space. According to the mode, an indoor fermentation mode is adopted for the straw mushroom base material, so that a stable fermentation environment can be provided for the straw mushroom base material, the straw mushroom base material is fully fermented, and the planting yield of straw mushrooms is effectively increased.

The invention discloses a gas turbine SCR denitration ammonia injection automatic adjusting system and method, and relates to the technical field of gas turbine flue gas denitration, and the method comprises the following steps: periodically obtaining first difference value data and second difference value data; wherein the first difference value data is obtained by calculating the difference value between the outlet NOx concentration data and a preset NOx concentration target value; the second difference value data is obtained by calculating the difference value between the NOx concentration data before denitration and a preset NOx concentration target value; and performing double-component decomposition including a baseline component and a transient component on the first difference data, and recombining a double-component decomposition result to obtain unit area ammonia gas amount data. According to the scheme, the steady-state deviation and the dynamic disturbance are separated through error decomposition and variance correction, the problem of ammonia spraying amount calculation errors caused by the fact that the steady-state deviation and the transient deviation are not distinguished in the prior art is solved, the weight of the transient component is dynamically adjusted through variance correction, and the ammonia spraying amount calculation accuracy is improved. And the generation process of the unit area ammonia gas amount data can respond to the long-term operation requirement of the system.

The invention belongs to the technical field of organic fertilizer processing, and particularly relates to a sheep manure organic fertilizer and a production process thereof. The process comprises the following steps: adding straws into sheep manure to adjust the carbon-nitrogen ratio to (25-35): 1, carrying out composting fermentation and keeping ventilation, collecting ammonia gas by using a calcium superphosphate solution, and adding the calcium superphosphate solution into compost during turning in a high-temperature period. The process is realized through a specific organic fertilizer preparation device, the device comprises a fermentation box and a recovery box, the fermentation box is provided with a turning mechanism and a spraying device, and a calcium superphosphate solution and related structures are arranged in the recovery box to enhance ammonia absorption. In the process, parameters such as calcium superphosphate solution concentration, liquid level height, stockpiling ventilation rate and the like are limited. The organic fertilizer prepared by the process is small in nitrogen loss, supplements phosphorus element, effectively improves the fertilizer efficiency performance, can effectively avoid the risk of unqualified fertilizer, and enables the product quality to be more stable.

The present invention relates to a urea injection amount control method, device, electronic device, and computer storage medium, belonging to the technical field of engine exhaust purification. The method comprises: obtaining a first nitrogen oxide measurement value at an SCR system inlet, a second nitrogen oxide measurement value at an SCR system outlet, and a calculated ammonia concentration value at the SCR system outlet; calculating a calculated nitrogen oxide concentration value at the SCR system outlet based on the second nitrogen oxide concentration measurement value and the calculated ammonia concentration value, and calculating a nitrogen oxide conversion efficiency based on the first nitrogen oxide concentration measurement value and the calculated nitrogen oxide concentration value; calculating a urea injection amount correction factor and a nitrogen oxide conversion efficiency correction factor based on the calculated ammonia concentration value at the SCR outlet, the calculated nitrogen oxide conversion efficiency value, and a preset nitrogen oxide conversion efficiency target value, and adjusting the urea injection amount. The present invention can improve the accuracy of the final urea injection control, reduce nitrogen oxide emissions, and reduce ammonia leakage.

The invention discloses a coal power unit flue gas waste heat power generation carbon dioxide capture comprehensive utilization system, which is characterized in that a flue gas waste heat ammonia steam turbine generator set is replaced by a flue gas waste heat low-temperature nitrogen steam turbine generator set or an expansion machine generator set, low-temperature nitrogen after doing work absorbs heat from flue gas, the flue gas is reduced to a lower temperature, and the flue gas waste heat ammonia steam turbine generator set is replaced by the expansion machine generator set. Carbon dioxide trapped after purification treatment is hydrogenated to prepare methanol which returns to the boiler for combustion, and the process is repeated, so that the coal consumption of the boiler can be reduced, and the problems of carbon dioxide absorption and storage are solved; part of power generated by the low-temperature nitrogen steam turbine generator unit or the expansion machine generator unit is used for producing hydrogen / oxygen by electrolyzing water, a low-temperature nitrogen freezing treatment device and other auxiliary machines, and the rest part increases the on-grid power, so that the benefits of the coal power unit are greatly improved. The methanol returns to the boiler for combustion, so that the effects of low-load stable combustion of the boiler and rapid load rising of the boiler can be achieved, and the requirements of deep peak regulation and high load change rate of a new-generation coal power unit are met.

Aiming at the problems of large flue gas nitrogen oxide generation amount, easy exceeding and serious pollution possibly existing in ammonia gas blending combustion, the invention provides an ammonia gas out-of-furnace bypass combustion blending combustion oxidation method, which comprises the following steps: preparing NO2 by virtue of an ammonia combustion system, generating O.free radicals by virtue of photo-thermal cracking of NO2, oxidizing NO in flue gas into NO2, cracking NO2 into N2, removing NO by virtue of NO2, and performing denitration by virtue of denitration, so that the nitrogen oxide in the flue gas is not easily generated. According to the method, SO2 is oxidized into SO3 through O.free radicals, the SO3 reacts with calcium for desulfurization, CO and VOCs are oxidized into CO2 and H2O, collaborative purification of multiple pollutants is achieved, reduction denitration and wet desulfurization are replaced and used for denitration and desulfurization of combustion flue gas and collaborative treatment of the multiple pollutants, and deep pollution reduction, carbon reduction, energy conservation and efficiency improvement are achieved.

The invention discloses a constant-volume optical test platform suitable for ammonia-hydrogen stratified combustion and a test method. The test platform comprises an experiment bench; the constant-volume combustion bomb is mounted on the experiment bench, and the interior of the constant-volume combustion bomb is divided into a combustion chamber and two heating chambers by two partition pieces; the ejector mounting seat is arranged at the top of the combustion chamber; the hydrogen ejector is mounted on the ejector mounting seat and is arranged towards the center of the combustion chamber; the two spark plugs are respectively arranged on the two separators and are arranged towards the center of the combustion chamber; the ammonia gas-air channel is arranged on the ejector mounting seat; the two first windows are symmetrically arranged on the two side faces, adjacent to the partition piece, of the combustion chamber. The second window is arranged on the bottom surface of the combustion chamber; the optical system is installed on the experiment bench, and the optical system and the constant volume combustion bomb form an optical path position required by a schlieren method and a direct shooting method; and the control system is electrically connected with the hydrogen ejector, the spark plug and the optical system.

The utility model discloses an electric field combustion-supporting jet ignition device and an ammonia fuel engine, and relates to the technical field of internal combustion engines, the electric field combustion-supporting jet ignition device comprises a jet device, an auxiliary electrode, a spark plug and an ammonia sprayer, the jet device comprises a jet device main body and a jet nozzle, and the jet device main body is connected with the jet nozzle to form a pre-combustion chamber; the pre-combustion chamber is communicated with the main combustion chamber; the auxiliary electrode comprises a pre-combustion chamber auxiliary electrode and a main combustion chamber auxiliary electrode, the auxiliary electrode is connected with the control unit through an electrical circuit, and an electric field is formed in the pre-combustion chamber and the main combustion chamber; the spark plug is electrically connected with the control unit through an electrical circuit; and the ammonia spraying device is used for spraying ammonia gas into the pre-combustion chamber through a nozzle outlet of the ammonia spraying device, the ammonia gas is fully mixed with air in the pre-combustion chamber, the mixed gas is ignited at an ignition electrode of the spark plug under the action of an electric field, and the ammonia mixed gas in the main combustion chamber is ignited. Electric field combustion supporting is applied to the jet ignition device, and the combustion reaction rate and the flame propagation speed are increased.

The invention relates to the technical field of livestock and poultry breeding environment control, and discloses a meat duck shed energy-saving ventilation system and method based on air purification and reuse, and the method comprises the steps: carrying out the time-sharing collection of the temperature, humidity and ammonia gas, carbon dioxide and dust concentration of each ventilation region in a meat duck shed, and recognizing the abnormal air flow and pollution accumulation points; air is guided in a partitioned mode according to the pollution type and the flow direction, dust-containing air is separated in the mode that gravity settling and primary filtering are combined, wet air is subjected to circulating condensation treatment, and high-concentration ammonia gas flow is subjected to adsorption or chemical neutralization treatment; a multi-stage closed-loop circulation is formed through the opening-degree-variable air valve and the multi-speed circulating fan; in the backflow process, the recycled air and the fresh air are mixed in proportion through an adjustable air mixing pipeline; and the ventilation paths, the filtering units and the air partition conditions are analyzed regularly, and the cleaning period, the flow dividing proportion and the circulating fan operation mode are adjusted. The device has the advantage of improving the purification efficiency.

The invention discloses a carboxyl-functionalized porous organic polymer, a preparation method thereof and application of the carboxyl-functionalized porous organic polymer in ammonia gas adsorption separation and sensing. The polymer is obtained by free radical polymerization, hydrolysis and acidification of monomers containing vinyl and ester groups, and has a mesoporous structure and a skeleton carboxyl functional group. The preparation method is simple and mild in condition. The polymer has excellent adsorption selectivity and high adsorption capacity on ammonia gas, the static adsorption capacity on the ammonia gas under the conditions of 298 K and 1 bar is not lower than 6.5 mmol / g, the ammonia gas can be efficiently separated from NH / N / H and NH / COs mixed gas, and the cycling stability is good. An ammonia gas sensor prepared by taking the graphene oxide as a sensitive material has linear or piecewise linear response to ammonia gas with the concentration of 1-100 ppm at room temperature, the detection limit is lower than 30 ppb, and the selectivity is excellent. The invention overcomes the defects of the existing ammonia gas adsorption separation material and sensor, has important significance for optimizing the ammonia production process and reducing pollution, and has wide application prospects.

The invention discloses an ammonium carbamate denitration agent pyrolysis box for preventing crystallization. The ammonium carbamate denitration agent pyrolysis box comprises a box body, a conveying belt, a first heating assembly and a second heating assembly. The ammonium carbamate powder is heated from the upper portion of the ammonium carbamate powder through the first heating assembly, the ammonium carbamate powder is heated from the lower portion of the ammonium carbamate powder through the second heating assembly, it is effectively guaranteed that ammonium carbamate is completely decomposed on the conveying belt, and the defect that a medium can only be heated and decomposed from a single face through traditional heating equipment is overcome. Ammonium carbamate powder is fully pyrolyzed on the conveying belt, so that the problem of pipeline blockage caused by caking of ammonium carbamate in the flue gas denitration process is avoided. The box body can ensure that ammonium carbamate is fully decomposed to generate enough ammonia gas for denitration reaction, so that the denitration efficiency is improved. As the ammonium carbamate is directly decomposed in the box body, the ammonia preparation method does not need to be carried out under a high-temperature condition like the traditional urea ammonia preparation method, the ammonia preparation efficiency is improved by 5.9%-23.5% and averagely improved by 14.70% compared with the urea, and the ammonia preparation energy consumption is reduced by 48.0%-65.0%.

The present invention provides a method and device for passivation repair of damage from half-cell cutting in a solar cell. The method comprises: (1) providing a plate-type PEALD deposition device; (2) placing sliced solar cells in a carrier and enabling sliced sections to be completely exposed, and preheating same; (3) introducing TMA, water vapor, and nitrogen, and depositing an aluminum oxide thin film on the surfaces of the sliced sections; (4) carrying out nitrogen purging, introducing TMA, ammonia gas, and nitrogen, and depositing an aluminum nitride thin film on the surface of the aluminum oxide thin film; and (5) carrying out annealing treatment, and breaking the vacuum for unloading. In the present invention, by sequentially depositing an aluminum oxide layer and an aluminum nitride layer on the surfaces of the sliced sections of the sliced solar cells, the damage at a cell laser half-cell cutting position is passivated and repaired, so that the efficiency of the repaired half-cut solar cells is increased by 0.1-0.3%.

The utility model discloses a flue gas denitration system, ammonia gas generation and injection unit and ammonia adsorption-desorption-reuse system, ammonia gas generation and injection unit is connected to the high temperature section of boiler, ammonia adsorption-desorption-reuse system is connected between desulfurization tower and chimney. The ammonia gas generation and injection system injects excessive ammonia gas into high-temperature flue gas, nitrogen oxide is reduced into nitrogen and water, the ultralow emission requirement is met, unreacted ammonia gas is adsorbed and purified through the escaping ammonia adsorption-desorption-recovery system at the tail end and recovered to the ammonia gas injection system for reuse, and it is guaranteed that chimney emission is safe and environmentally friendly. Based on the SNCR system, ultralow emission of nitrogen oxide and closed-loop operation of a reducing agent are realized, one-time investment and operation cost is low, the problem of conventional ammonia escape pollution is solved, and the system is economical and environment-friendly.

The invention discloses a vehicle-mounted ammonia hydrogen production system, belongs to the technical field of vehicle-mounted ammonia hydrogen production, and solves the technical problems that the existing vehicle-mounted ammonia hydrogen production method cannot fully recycle high-pressure ammonia energy and cannot use air energy. The system comprises a liquid ammonia tank, an ammonia hydrogen production heat exchange catalytic reactor, an engine and a controller, the liquid ammonia tank is connected with the ammonia hydrogen production heat exchange catalytic reactor through an ammonia gas pipe, the engine is connected with the ammonia hydrogen production heat exchange catalytic reactor through an exhaust pipe, and the ammonia gas pipe is sequentially provided with a control valve, a first heat exchanger, a turbine generator, a large-area heat exchanger and a second heat exchanger. The turbine generator is electrically connected with the vehicle-mounted storage battery, the large-area heat exchanger is connected with a variable-frequency air blower through an air pipe, the engine is connected with the first heat exchanger through a cooling water pipe, and the ammonia hydrogen production heat exchange catalytic reactor is connected with the second heat exchanger through a nitrogen hydrogen pipe. High-pressure ammonia gas energy and air energy can be fully recycled and used through the turbine generator and the large-area heat exchanger.

The embodiment of the invention relates to an intelligent treatment method for a toilet peculiar smell source, which comprises the following steps: firstly, acquiring real-time temperature, humidity, various gas concentrations and peculiar smell intensity from a temperature and humidity sensor, an ammonia gas sensor, a hydrogen sulfide sensor, a TVOC (Total Volatile Organic Compound) sensor and a peculiar smell sensor according to a preset frequency to form current monitoring data; then, whether all the gas concentrations exceed the threshold value or not is recognized, if yes, the force of the ventilation and exhaust device is reduced, and the ion generator and the photocatalytic oxidation module are closed; if not, the ventilation force is increased, the device is started, and the deodorant atomizing and spraying device is driven to spray. Then, whether the odor intensity exceeds a threshold value or not is judged, if yes, an environment monitoring vector is generated based on current data, an odor source recognition model is input to obtain a classification vector, the total probability of the sources exceeding the threshold value is counted, a manual cleaning instruction is sent to a cleaning client when the total probability is larger than 0, and precise treatment of the toilet odor is achieved.

The utility model discloses a gas turbine system based on ammonia catalytic cracking. The gas turbine system comprises a liquid ammonia assembly, a cracking assembly, a liquid ammonia combustion assembly, a heat exchange component and a gas turbine, the cracking assembly is used for pressurizing and cracking part of liquid ammonia provided by the liquid ammonia assembly to generate cracking gas; the liquid ammonia combustion assembly comprises a gasification part and a combustion part which are connected with the liquid ammonia assembly, the gasification part is used for gasifying the other part of liquid ammonia provided by the liquid ammonia assembly, and the combustion part is used for combusting ammonia gas generated by the gasification part so as to provide required heat for the cracking assembly; the heat exchange part and the gas turbine are sequentially connected with the cracking assembly, the heat exchange part is used for cooling cracking gas, and the cooled cracking gas is conveyed into the gas turbine for combustion; smoke exhausted by the combustion component and the gas turbine provides heat needed by the gasification component. Pyrolysis gas generated by pure ammonia catalytic cracking can be used as fuel, the combustion effect is improved, and the energy utilization efficiency is improved.

The invention discloses a toxic gas detector, and relates to the technical field of toxic gas detection. The negative-pressure fan blades and the auxiliary paddles are arranged in the detection cylinder to form a negative-pressure flow field, and the bottom of the cylinder body realizes self-adaptive speed increase through the gear ring-planet regulation and control mechanism; the separation dust collection box adopts tangential multi-channel air intake and is provided with an inverted-cone-shaped sliding funnel, and particles are separated in a centrifugal mode; purified gas is sent to an electrochemical sensor group through a coaxial central gas inlet pipe, so that high-sensitivity monitoring on hydrogen sulfide, carbon monoxide, oxygen and ammonia gas is realized; the problems that an existing detector is prone to being blocked by dust, insufficient in flow and tedious in maintenance are solved, the detection speed, accuracy and reliability are improved, and the device is suitable for continuous safety monitoring of various high-risk environments such as mines, chemical engineering and municipal pipe networks.

The utility model discloses a vehicle ammonia supply device which comprises a liquid ammonia storage tank, a liquid outlet and a gas outlet are arranged on the liquid ammonia storage tank, the liquid outlet is respectively connected with one end of a filling pipeline and one end of a liquid outlet pipeline, the liquid outlet pipeline is connected with a stop valve and an electromagnetic valve in series, the other end of the liquid outlet pipeline is connected with a first medium inlet of a water bath type vaporizer, and the other end of the water bath type vaporizer is connected with a second medium inlet of the water bath type vaporizer. A first medium outlet of the water bath type vaporizer is connected with an inlet of the buffer tank, an outlet of the buffer tank is used for providing ammonia gas, one end of the gas return pipeline is connected with the gas outlet, a pressure gauge, a stop valve and a safety valve are connected to the gas return pipeline in series, and a second medium inlet and a second medium outlet of the water bath type vaporizer are used for being connected with an engine cooling liquid outlet and an engine cooling liquid inlet respectively. And a saturation pressurization pipeline is further arranged, an electromagnetic valve and a heat exchange pipe located in the liquid ammonia storage tank are connected to the saturation pressurization pipeline in series, and two ports of the saturation pressurization pipeline are used for being connected with an engine cooling liquid inlet and an engine cooling liquid outlet respectively. The ammonia supply device for the vehicle can stably supply gas to the vehicle.