436 results about "Liquid ammonia" patented technology

A toxic ammonia gas absorption system for a liquid ammonia fuel ship, comprising a toxic ammonia gas release source (100), an ammonia gas absorption tank (200), an ammonia gas guide pipe, and a diluted ammonia gas discharge pipe. The ammonia gas absorption tank (200) is provided with an absorbent (201), a gas diffusion layer (202), a liquid level switch (203), a gas phase space (206) and a temperature control device (207). The present system can improve the safety, environmental friendliness and economy of ships using ammonia fuel.

The invention relates to the technical field of chemical engineering, in particular to a food-grade ammonia water production system and method. The food-grade ammonia water production system comprises a liquid ammonia tank, a first heat exchanger, a first buffer device, an absorption tower and a second heat exchanger which are connected in sequence; the first heat exchanger is used for heating liquid ammonia to form ammonia gas; the second heat exchanger is used for cooling the ammonia water; an ammonia gas pipeline is arranged between the first buffer device and the absorption tower, and a pressure sensor is arranged on the ammonia gas pipeline; a second buffer device is arranged between the pressure sensor and the ammonia gas pipeline; the first buffer device internally comprises an air inlet pipe, a plurality of distribution pipes arranged in parallel and an exhaust pipe which are connected in sequence; the pipe diameter of the distribution pipe is smaller than that of the gas inlet pipe or the gas outlet pipe. The food-grade ammonia water production system provided by the invention can reduce the fluctuation amplitude of pipeline pressure caused by the process of forming ammonia gas from liquid ammonia, improves the production stability, and enables the detected pipeline pressure value to have a higher reference value.

The invention discloses an ammonia water solution preparation system capable of efficiently dissolving gas and a process thereof. The system comprises a liquid ammonia bottle, an ammonia water solution buffer tank, an escape ammonia water absorption tank, an ammonia water solution tank and an ammonia gas absorber which are sequentially communicated through a connecting pipeline, gas inlets of the connecting pipelines are formed in the tops of the liquid ammonia bottle, the ammonia water solution buffer tank, the escape ammonia water absorption tank or the ammonia water solution tank, and gas outlets of the connecting pipelines are formed in the bottoms of the ammonia water solution buffer tank, the escape ammonia water absorption tank, the ammonia water solution tank or the ammonia gas absorber; the tops of the ammonia water solution buffer tank, the escaped ammonia water absorption tank, the ammonia water solution tank and the ammonia gas absorber are communicated to a demineralized water pipeline through connecting pipelines. The device has the advantages that ammonia gas can be utilized at the maximum efficiency, waste caused by leakage of the ammonia gas is avoided, and compared with a traditional device, cost is saved to a great extent.

The invention provides a novel system for efficiently carrying out heat-work conversion by taking liquid ammonia / water as a circulating working medium, low-grade sensible heat can be recovered, latent heat is recovered by using an ammonia compressor to compress and heat a circulating working medium gasification heat source, and the heat-work or thermoelectric conversion efficiency is greatly improved. According to the invention, the liquefied latent heat of the working medium is effectively utilized as an internal heat source for circulating gasification, the economic and technical bottleneck of low efficiency of implementing low-grade thermoelectricity or heat-work conversion in the existing combined heat and power generation or ammonia working medium is well broken, the energy consumption and the working medium circulation amount can be greatly reduced, and the method has wide popularization and application values and is worthy of popularization and application. And greater economic and social environmental protection benefits can be created, and energy conservation and emission reduction are greatly realized.

The present application relates to the technical field of ammonia compound preparation, in particular to a method for preparing ammonium sulfate and co-producing sodium bicarbonate by using sodium sulfate, comprising the following steps: mixing industrial-grade liquid ammonia with deionized water to prepare ammonia water with a free ammonia concentration of 60-120 ti (ti is the abbreviation of titer, which is 1 / 20 mol / L), controlling the temperature of the mixing process to be less than or equal to 40 DEG C to avoid ammonia volatilization, pre-carbonizing by passing in CO2 under the conditions of 20-70 DEG C and a carbon dioxide pressure of 0.1-0.6 MPa, and adding sodium sulfate or a mixture of sodium bicarbonate and mirabilite to obtain a pre-carbonized liquid. The present application adopts an integrated process of pre-carbonization, clarification, carbonization, ammonia separation and low-temperature crystallization, and ammonia evaporation circulation, and can be operated continuously or intermittently, has low industrial implementation difficulty, strong running stability, separates ammonium sulfate by using ammonia separation and low-temperature crystallization technology, replaces the traditional evaporation and concentration process, combines material recycling design, and reduces the energy consumption per unit product compared with the traditional process.

The invention belongs to the technical field of glycine preparation, and particularly discloses a preparation method of glycine. The method comprises the following steps: controlling the reaction temperature, efficiently synthesizing ammonium chloroacetate from chloroacetic acid and liquid ammonia in a reactor, carrying out catalytic ammonolysis on the ammonium chloroacetate and ammonia gas in a reactor filled with a solid catalyst to realize continuity and reinforcement of the process, and carrying out alcohol precipitation crystallization, separation and purification to obtain glycine. The solid catalyst provided by the invention has the advantages of simple preparation, reproducibility, long service life, no metal pollution, easily available raw materials, controllable cost, long-acting cyclic utilization, high efficiency, simple recovery and the like; the method for preparing glycine by using the solid catalyst solves the problems of high consumption, high recovery cost, low production and purification efficiency and pollution caused by the traditional catalyst, and is a key technology for green and low-cost industrial production of glycine.

The application discloses a kind of ammonia hydrogen mixed natural gas combustion boiler test platform and its working method, test platform includes natural gas storage tank, hydrogen storage tank, liquid ammonia storage tank and liquid ammonia heating system, natural gas storage tank is connected with the multiple-component gas burner installed on gas boiler, hydrogen storage tank is connected with the multiple-component gas burner installed on gas boiler and is equipped with hydrogen flow regulating valve on connecting pipeline, liquid ammonia storage tank is connected with ammonia water pump, and ammonia water pump outlet is connected with liquid ammonia heating system, liquid ammonia heating system can heat liquid ammonia into ammonia gas of preset temperature, and the outlet of liquid ammonia heating system is connected with multiple-component gas burner and is equipped with ammonia gas main flow regulating valve on connecting pipeline.The application can realize zero carbon emission, and the system structure is reasonable, with the characteristics that heat can be matched and utilized in stages, providing a kind of thought for the development of industrial boiler in future.

The utility model discloses a device is unloaded to tank car with ice machine liquid ammonia simply, including compressor, ice machine system, liquid ammonia unloading pipeline, liquid ammonia pipeline, medium pressure nitrogen pipeline and tank car, ice machine system includes anti surge cooler, liquid ammonia storage jar and power saver, compressor links to each other with anti surge cooler, and anti surge cooler links to each other with liquid ammonia storage jar, and liquid ammonia storage jar links to each other with power saver, and power saver links to each other with the ammonia cooler of low temperature methanol washing system, and the ammonia cooler of low temperature methanol washing system links to each other with compressor, be connected with liquid ammonia pipeline on liquid ammonia storage jar, and liquid ammonia pipeline links to each other with tank car, be connected with liquid ammonia unloading pipeline on power saver, and liquid ammonia unloading pipeline links to each other with liquid ammonia pipeline, and medium pressure nitrogen pipeline links to each other with liquid ammonia pipeline and tank car. Advantage is: guarantee ice machine system supplement liquid ammonia and can utilize same pipeline safely and effectively when storing liquid ammonia in system and unloading, avoid the emergence of overpressure or leakage due to preparation use temporary pipeline and cause safety accident.

The invention belongs to the technical field of tert-butylamine preparation, and particularly relates to a preparation process for synthesizing tert-butylamine by adopting methyl tert-butyl ether. The preparation process comprises the following steps: preparing calcium alginate microspheres; preparing an SAPO precursor solution; performing composite crystallization; preparing an SAPO-11 carrier; preparing an ammonium type SAPO-11 carrier; preparing a metal supported catalyst; preparing an activated catalyst; methyl tert-butyl ether and liquid ammonia are used as raw materials, and tert-butylamine is prepared under the catalysis of an activated catalyst. According to the preparation process for synthesizing the tert-butylamine by adopting the methyl tert-butyl ether, the process of catalytically synthesizing the tert-butylamine by taking the methyl tert-butyl ether and the ammonia as raw materials follows an acid catalytic cracking nucleophilic addition coupling mechanism, and the prepared hierarchical pore CuZn / HSAPO11 catalyst remarkably reduces the reaction activation energy through the synergistic effect of B acid, L acid and metal active sites; high-activity and high-selectivity catalytic conversion at low temperature is realized, and high-purity tert-butylamine is prepared.

The application provides a kind of liquid ammonia production safety monitoring method.The method includes obtaining the liquid ammonia safety state parameter of liquid ammonia storage tank;The liquid ammonia safety parameter is stored and is processed with preset safety parameter, and the liquid ammonia storage difference component is obtained;According to the liquid ammonia supervision signal sent by the liquid ammonia storage difference component to chemical production system, the production early warning state of the liquid ammonia early warning device on the liquid ammonia storage tank is adjusted.Through the collection of liquid ammonia safety state parameter, the current safety production situation of liquid ammonia storage tank is determined, and the liquid ammonia safety parameter is stored and processed with preset safety parameter, which is compared with the current safety production state and standard production state of liquid ammonia storage tank to determine the difference degree of production state, and finally according to the difference degree reflected by the liquid ammonia storage difference component, the accurate leakage warning of liquid ammonia storage tank production is facilitated, and the ammonia leakage warning accuracy is effectively improved.

The application provides a liquid ammonia storage tank cleaning device and relates to the technical field of liquid ammonia storage.The device comprises a clamping mechanism for clamping a tank body, a mounting rack and a base frame, the clamping mechanism and the mounting rack are both mounted on the base frame, the mounting rack is provided with an extension mechanism, the end of the extension mechanism is rotatably provided with a frame body, a plurality of rotating frames are rotatably arranged on the frame body, and cleaning strips are arranged on the rotating frames; the rotating frames can rotate to push the cleaning strips close to the inner wall of the tank body, and the cleaning strips can deform along with the contour of the tank body and adhere to the inner wall of the tank body; the cleaning strips can be driven to be inclined or transversely arranged in the tank body by a driver; the rotating frames can rotate relative to the frame body and push the cleaning strips to move to the inner wall of the tank body and adhere to the inner wall of the tank body; the flexibility of the arc-shaped frame can make the cleaning strips deform when adhering to the inner wall of the tank body, so that the tank body is cleaned; the device can clean different vertical pipes and improve convenience for cleaning vertical, spherical and columnar tanks.

The ammonia recovery system for purge gas comprises a heat exchange separation mechanism, a nitrogen circulation mechanism and an expansion machine, the nitrogen circulation mechanism comprises a nitrogen pipeline and a compressor, and nitrogen, refrigerated by the cold end of the expansion machine, in the nitrogen pipeline passes through the heat exchange separation mechanism and then passes through the compressor. The compressor is installed on the nitrogen pipeline and drives nitrogen in the nitrogen pipeline to sequentially flow through the cold end of the expansion machine, the heat exchange separation mechanism and the hot end of the expansion machine and then return to the compressor to form nitrogen circulation. The heat exchange separation mechanism is connected with the purge gas, and the heat exchange separation mechanism takes nitrogen output by the cold end of the expansion machine as a cold source to cool the purge gas, so that ammonia gas in the purge gas is liquefied into liquid ammonia, and the liquefied liquid ammonia in the purge gas is separated and output. According to the technical scheme, ammonia gas is separated and recycled in a cooling and liquefying mode, gaseous ammonia in the purge gas can be effectively recycled, resource waste is reduced, and pollution of the purge gas can be relieved.

The utility model relates to the technical field of chemical equipment relates to a 1, 5 -diaminonaphthalene production device, including the reaction kettle that is equipped with heat exchange device and stirring device, the feed inlet of reaction kettle is communicated to the material preparation tank and liquid ammonia storage tank through pipeline, valve and pump respectively, and the discharge port of reaction kettle is communicated to crystallization kettle, first filtering device, reflux kettle, second filtering device and drying device in proper order through pipeline, valve and pump. The utility model production process is simple, and the reaction process is easy to control, and the production product yield is high, and the quality is good, and is easy to industrial production.

The application discloses a system and method for blending biomass and ammonia gas in a pulverized coal furnace, and belongs to the technical field of fuel combustion. The boiler combustion area is divided into a stable combustion zone, a main combustion zone, a reduction zone I, a burnout zone I, a reduction zone II and a burnout zone II. The stable combustion zone is provided with a biomass burner and a pulverized coal burner, the main combustion zone is provided with a biomass burner, a pulverized coal burner and an ammonia gas burner, the reduction zone I and the reduction zone II are arranged with ammonia gas burners, and the burnout zone I and the burnout zone II are arranged with burnout air ports, which is conducive to the stable blending combustion of pulverized coal, biomass and ammonia gas and reduces the emission of nitrogen oxides. The application improves the combustion stability and relieves the problems of ash deposition, slagging and corrosion through biomass pretreatment such as secondary crushing, water washing and drying. The application uses the heat of high-temperature flue gas for liquid ammonia gasification and biomass drying, thereby improving the energy utilization rate.

The invention discloses a hybrid power turboshaft engine and a working method, the engine comprises a core machine system and a fuel cell power supply system, and the core machine system comprises an air inlet channel, an air compressor, a main combustion chamber, a gas turbine and a power turbine; the fuel cell power supply system comprises a liquid ammonia storage tank, a fuel pump, a liquid ammonia decomposer, a pressure reducing valve, a heat exchanger and a proton exchange membrane fuel cell. According to the invention, a hybrid power form of combining a turbine power system and a fuel cell power system is adopted, so that the output power of the turboshaft engine is ensured, and meanwhile, the proton exchange membrane fuel cell provides electric energy for airborne electric equipment of the engine; the problems that the electric power requirement of an existing turboshaft engine is gradually improved, power of storage batteries such as lithium batteries is insufficient, and electric power is difficult to extract from a power turbine are solved. Meanwhile, the ammonia working medium serves as power generation fuel, the energy conversion efficiency of the aviation turboshaft engine is improved, and energy consumption is reduced.

The solvated metal particle-coating system includes a metal additive and a polar outer-sphere electron transferring solvent. The metal additive is solvated in the polar outer-sphere electron transferring solvent. The polar outer-sphere electron transferring solvent may include liquid ammonia, methylamine, and / or hexamethylphosphoramide. The metal additive may include an alkali metal and / or an alkaline earth metal. The solvated metal additive within the polar outer-sphere electron transferring solvent may be used to coat a metal particle and / or a metalloid particle as a layer. As the polar outer-sphere electron transferring solvent evaporates, the solvated metal additive is coupled to the metal particle and / or the metalloid particle.

The utility model relates to the field of ammonia water, and discloses an integrated skid-mounted ammonia water preparation device which comprises an air exhaust mechanism, the air exhaust mechanism comprises a connecting pipe, a liquid ammonia storage box is fixedly connected to the top of the connecting pipe, an air pipe is fixedly connected to the side, away from the connecting pipe, of the liquid ammonia storage box, and an exhaust fan is fixedly arranged in the head position of the air pipe. The bottom of the air pipe is fixedly connected with a reaction box, the bottom end face of the connecting pipe is slidably connected with a moving plate, the inner wall of the moving plate is in threaded connection with a screw rod, the inner wall of the reaction box is provided with a cooling mechanism, and the cooling mechanism comprises cooling fins. According to the utility model, the flow velocity of liquid ammonia can be controlled through the arrangement of the air exhaust mechanism, the liquid ammonia is prevented from excessively flowing into water to influence the concentration of ammonia water, the same concentration of liquid ammonia in each batch can be ensured through the arrangement of the air pipe and the exhaust fan, the concentration of ammonia water can be accurately controlled, and a stable environment can be provided for the reaction of ammonia water through the cooling mechanism.

The invention relates to the technical field of ammonia compound preparation, in particular to a method for preparing ammonium sulfate and co-producing sodium bicarbonate by using sodium sulfate, which comprises the following steps: mixing industrial liquid ammonia with deionized water to prepare ammonia water with the free ammonia concentration of 60-120ti (ti titer abbreviation, namely 1 / 20mol / L), and controlling the temperature to be less than or equal to 40 DEG C in the mixing process to avoid ammonia volatilization, cO2 is introduced for pre-carbonization under the conditions that the temperature is 20-70 DEG C and the pressure of carbon dioxide is 0.1-0.6 MPa, sodium sulfate or a mixture of mirabilite and sodium bicarbonate is added, and a pre-carbonization solution is obtained; the process adopts an integrated process of pre-carbonization, clarification, carbonization, ammoniation low-temperature crystallization and ammonia distillation circulation, can be continuously or intermittently operated, is low in industrial implementation difficulty and high in operation stability, separates ammonium sulfate through an ammoniation and low-temperature crystallization synergistic technology, replaces a traditional evaporation and concentration process, is combined with a material cyclic utilization design, and has a good industrial application prospect. The unit product energy consumption is reduced compared with the traditional process.

This utility model belongs to the field of chemical production equipment technology, specifically an automatic liquid level control system for a liquid ammonia separator. It includes a liquid ammonia separator with a sealing cover fixed to its top by bolts. The sealing cover has an air inlet and an air outlet on its left and right sides, respectively. This utility model uses a centrifugal separation component inside the sealing cover, employing a drive motor to rotate the separation filter cartridge at high speed. This generates centrifugal force within the filter cartridge, causing droplets to be intercepted by the filter screen and thrown towards the inner wall of the separation filter cartridge. Simultaneously, a molecular sieve in the outlet cylinder and a microfilter plate at the bottom of the outlet hopper form a multi-stage filtration structure. The molecular sieve adsorbs residual moisture and impurities in the gas. Furthermore, a liquid level adjustment component monitors the liquid level in the separator in real time using an ultrasonic level gauge, transmitting the signal to a PLC control box. After processing by a built-in algorithm, the signal drives an electric valve to dynamically adjust its opening, achieving precise automatic control of the liquid level.

Embodiments of the present application disclose a control method, device and equipment of a hydrogen-ammonia hybrid engine and a storage medium. The method comprises: determining a current working condition of a vehicle according to an accelerator pedal opening degree and an engine speed; wherein the working condition comprises a starting working condition, an idling working condition and a driving working condition; determining a target torque and at least one corresponding fuel according to the working condition; wherein the fuel comprises one or more of hydrogen, liquid ammonia and gaseous ammonia; distributing the target torque to the at least one fuel to obtain a sub-torque corresponding to the at least one fuel; and combusting the at least one fuel based on the sub-torque to drive the engine to work. Based on the working condition, the target torque and the required fuel to be combusted are determined, and the target torque is distributed to each fuel to drive the engine to work, which can improve the working efficiency of the engine and the utilization rate of energy.

The invention discloses an anti-leakage backflow device of a liquid ammonia pump, which comprises a plurality of sets of plunger valves, a sealing seat and a valve body, the plurality of sets of plunger valves are arranged in the valve body through the sealing seat, each set of plunger valve comprises a plunger and a plunger sleeve, a first O-shaped sealing ring is arranged between the plunger sleeve and the sealing seat, a second O-shaped sealing ring is arranged between the sealing seat and the valve body, and the first O-shaped sealing ring and the second O-shaped sealing ring are arranged in the valve body. An inclined hole is formed in the plunger sleeve; a cavity is formed among the plunger sleeve, the sealing seat, the first O-shaped sealing ring and the second O-shaped sealing ring; the inlet end of the pressure stabilizing valve component is connected with the cavity, and the outlet end of the pressure stabilizing valve component is connected with a liquid ammonia recovery device; according to the liquid ammonia recovery device, liquid ammonia flowing through the plunger in the liquid ammonia pump can flow into the cavity through the inclined hole in the plunger sleeve, when the pressure reaches the opening pressure of the pressure stabilizing valve component, the liquid ammonia flows into the liquid ammonia recovery device through the pressure stabilizing valve component, and the liquid ammonia recovery treatment process is completed.

The invention relates to 200 light, thin and wear-resistant underpants fabric, and belongs to the technical field of fabric. A self-made antibacterial chain extender participates in preparation to obtain modified spandex filaments, and then the modified spandex filaments and cotton fibers are made into the underpants fabric; the quaternary ammonium salt of the antibacterial chain extender can be combined with bacterial cell membranes and interfere cell metabolism, so that efficient bacteriostasis is realized; the flexible long-chain alkyl group has a plasticizing effect, the elasticity loss of the fabric after liquid ammonia finishing is relieved, an amido bond and a cotton fiber hydroxyl group form a hydrogen bond, the interface bonding is enhanced, the layering of a spandex filament and a cotton fiber is avoided, a polycyclic aromatic fused ring and the amido bond form a conjugated system, an intermolecular strong hydrogen bond is matched, the high-temperature stability of the spandex is improved, and the methoxy group can consume chlorine; a conjugated system stabilizes nitrogen-hydrogen bonds, condensed ring steric hindrance hinders chlorine attack, chlorine resistance of the fabric is enhanced, underpants are not prone to loosening and deformation after being worn for a long time, and elasticity and wrapping feeling are kept for a long time.

The application provides a cooling device for synthetic ammonia, which comprises an ammonia evaporation section and an ammonia drum section arranged above the ammonia evaporation section; the ammonia evaporation section comprises a first-stage ammonia cooler and a second-stage ammonia cooler arranged in series, a pipe passage gas inlet of the first-stage ammonia cooler is connected with a synthetic gas input pipeline, a pipe passage gas outlet of the first-stage ammonia cooler is connected with a pipe passage gas inlet of the second-stage ammonia cooler through a first pipeline, a pipe passage gas outlet of the second-stage ammonia cooler is connected with a synthetic ammonia gas output pipeline through a second pipeline, and a shell passage liquid ammonia inlet of the first-stage ammonia cooler and a shell passage liquid ammonia inlet of the second-stage ammonia cooler are respectively connected with a liquid ammonia pipeline; the ammonia drum section comprises a first ammonia drum and a second ammonia drum arranged in series, the first ammonia drum is arranged above the first-stage ammonia cooler correspondingly, the second ammonia drum is arranged above the second-stage ammonia cooler correspondingly, and the first-stage ammonia cooler and the first ammonia drum are connected with a first riser pipe and a first downcomer pipe, and the second-stage ammonia cooler and the second ammonia drum are connected with a second riser pipe and a second downcomer pipe. The device is stable in operation.

The utility model belongs to the technical field of ammonia water preparation, and particularly relates to a multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water, which comprises a bottom plate, and an ammonia storage tank, a water storage tank and a return tank are sequentially arranged on the rear side of the top of the bottom plate from right to left. A jet mixer, a static mixer and a U-shaped pipe are sequentially arranged in the middle of the top side of the bottom plate from right to left, the jet mixer realizes high-speed hedging and mixing of liquid ammonia and water by utilizing a Venturi effect, and the static mixer further enhances turbulence disturbance through an internal spiral shunting element; the S-shaped structure of the U-shaped pipe prolongs the mixing path and ensures full contact of the two phases, meanwhile, the spiral cooling flow channel of the first cooling sleeve rapidly takes away reaction heat by increasing the contact area of a cooling medium and the mixing pipe, the partition plate of the second cooling sleeve divides the cooling cavity into two sections, and the cooling effect is good. And cooling water is guided to form vortex flow through the spiral guide vanes, so that the heat transfer efficiency is enhanced.

The invention relates to the technical field of power generation, and provides an ammonia gasification and preheating system of an ammonia-doped boiler, which comprises a liquid ammonia supply unit, an ammonia gasification unit and an ammonia preheating unit, the liquid ammonia supply unit is used for providing liquid ammonia and adjusting the pressure of the liquid ammonia; the ammonia gasification unit comprises an ammonia gasifier, an inlet of the ammonia gasifier is connected with an outlet of the liquid ammonia supply unit, and the ammonia gasifier is configured to gasify liquid ammonia into ammonia by taking dead steam of a steam turbine as a heat source and recover condensed water; the ammonia preheating unit comprises an air pre-heater and an ammonia pre-heater arranged behind the air pre-heater; the ammonia pre-heater is used for heating ammonia gas from the ammonia gasification unit by utilizing flue gas at an outlet of the air pre-heater; and the preheated ammonia gas is conveyed to a combustor of the boiler. According to the scheme, the using amount of circulating water of the condenser and water supplementing loss are reduced, the investment of the cooling tower is reduced, meanwhile, the combustion stability of ammonia entering the boiler is improved, and fuel consumption is reduced.

The utility model discloses a safe and convenient liquid ammonia steel cylinder transfer trolley, which belongs to the field of chemical product production and comprises a trolley, at least one clamp, clamping force structures, suspension rods and a hoisting system, the number of the clamping force structures is the same as that of the clamps, and the number of the suspension rods is the same as that of the clamps. Each suspension rod is connected with a hoisting system, one suspension rod is connected with one clamping force structure, and one clamping force structure is connected with one clamp. Transfer of the liquid ammonia steel cylinder is completed, safety risks caused by the liquid ammonia steel cylinder in the transfer process are reduced, and it is guaranteed that risks caused by a transfer tool in the liquid ammonia leakage process are avoided.

The invention belongs to the technical field of textile processing, and particularly relates to a production process of a double-texture knitted shirt fabric. The fabric is formed by weaving jacquard weave, and the minimum pattern circulation unit of the fabric is composed of 16 transverse rows in the longitudinal direction and is composed of 4 coil longitudinal rows in the transverse direction. The production process comprises the following working procedures of spinning, weaving, singeing, washing, liquid ammonia treatment, dyeing, tentering and preshrinking. By means of unique design, rich and diversified visual texture feeling is created, the single-quality feeling and the surface stereoscopic impression are enhanced, the fabric has the stiff and smooth shape maintaining performance of woven fabric and the comfort and elasticity of knitted fabric, the double forms of outer-layer rhombic lattice grain large texture and inner-layer square lattice grain micro texture are formed, and the fabric is more attractive in appearance and more attractive in appearance. The skin is kept dry while the skin-friendly experience is provided; meanwhile, the fabric is natural and easy to care by means of a special weave structure and a specific production process, and the production process is high in stability and can meet the rapid production requirements of large goods and multiple varieties.

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.

The utility model relates to a kind of liquid ammonia meterable conveying devices, it includes: industrial ammonia storage tank, the industrial ammonia storage tank has industrial gas phase mouth and industrial liquid phase mouth;Vehicle-mounted liquid ammonia tank, the vehicle-mounted liquid ammonia tank has vehicle-mounted gas phase mouth and vehicle-mounted liquid phase mouth;Liquid ammonia delivery component, the liquid ammonia delivery component includes one end with the industrial liquid phase mouth is connected and the other end with the vehicle-mounted liquid phase mouth is connected liquid ammonia delivery pipe, liquid ammonia pump is installed on the liquid ammonia delivery pipe, pressure transmitter one is installed on the liquid ammonia delivery pipe and located in the liquid ammonia pump upstream, pressure transmitter three is installed on the liquid ammonia delivery pipe and located in the liquid ammonia pump downstream, check valve is installed on the liquid ammonia delivery pipe and located between the liquid ammonia pump and the pressure transmitter three and flowmeter is installed on the liquid ammonia delivery pipe and located between the check valve and the pressure transmitter three.Thus can improve filling efficiency, and liquid ammonia utilization is higher.

The utility model relates to the field of gas-water separation, in particular to a gas-water separation system for underground coal gasification. Comprising a product well, a synthesis gas washing assembly communicated with a gas outlet of the product well, a gas-water separation treatment assembly communicated with a liquid outlet of the synthesis gas washing assembly, a torch device communicated with a gas outlet of the gas-water separation treatment assembly, and a storage tank assembly communicated with a liquid outlet of the gas-water separation treatment assembly. According to the utility model, the combustible waste gas released in the gas-water separation process is safely combusted by using the torch device, so that atmospheric pollution caused by direct emission of the combustible waste gas is avoided; acid gas, phenols and ammonia nitrogen in the coal gas water are deeply removed through the phenol and ammonia recovery assembly, resource recovery of phenolic substances and liquid ammonia is achieved, meanwhile, purified wastewater can be reused for a chilling water circulating pump and conveyed to a product well or discharged after reaching the standard, the cyclic utilization rate of water resources is greatly increased, and the energy consumption is reduced. Therefore, the fresh water consumption and the wastewater treatment cost are obviously reduced.