56 results about "Liquid methane" patented technology

The invention discloses an online liquid methane preparation full-supercooling filling system and process. The system comprises a liquid methane storage device, a pressurizing pipeline, a liquid methane supercooling filling device, a filling pipeline, a liquid methane discharging device and a discharging pipeline. Wherein the output end of the liquid methane storage device is connected with the input end of the pressurizing pipeline, the output end of the pressurizing pipeline is connected with the input end of the filling pipeline, and the filling pipeline is respectively connected with a first filling branch and a second filling branch after passing through the liquid methane supercooling filling device. The first filling branch is used for being connected with a liquid methane storage tank on a rocket, and the second filling branch is used for being connected with the input end of the discharging pipeline. The output end of the discharging pipeline is connected with the liquid methane discharging device, and a discharging pipeline adjusting valve and a flow measuring instrument are arranged on the discharging pipeline. The system can ensure that the liquid methane flow is stable, meanwhile, the risk of crystallization caused by too low temperature of the supercooled liquid methane is avoided, and full supercooled filling of the liquid methane is achieved.

The invention relates to a system for full-supercooling large-flow liquid methane filling and a using method of the system. The full-supercooling large-flow liquid methane filling system is stable, reliable, high in automation degree, capable of dynamically adjusting the supercooling temperature and flow of liquid methane and high in accuracy, and comprises a storage box, a pressurization module, a recovery module, a methane filling module, a control module and a nitrogen filling module, and the pressurization module comprises a methane pressurization tank; the methane filling module comprises a methane filling tank, the nitrogen filling module comprises a nitrogen filling tank and a subcooler, the recovery module comprises a methane recovery tank, and the control module pressurizes the methane recovery tank and the methane filling tank by controlling the pressurization module and adjusts the filling flow and temperature of methane to prevent condensation by controlling the methane filling module and the nitrogen filling module. Flow stabilization and backflow are carried out by controlling the methane filling module and the recovery module.

The invention discloses a methane pre-cooling fuel gas generator circulation turbine enhanced combined power system which comprises a fuel turbine, a heat exchanger, a gas generator, a gas generator, a gas generator, a gas generator, a gas generator, a gas generator and a gas generator, and is characterized in that the heat exchanger is used for providing heat for fuel from a fuel pump and conveying high-temperature fuel gas to the fuel turbine so as to drive the fuel turbine to rotate; the oxidant turbine is used for driving the oxidant turbine to rotate by taking the high-temperature fuel gas output by the heat exchanger and the high-temperature fuel gas flowing out of the fuel turbine as power, so that the oxidant turbine drives the oxidant pump to work; high-temperature fuel gas obtained after the fuel from the fuel pump is heated by the heat exchanger is also used for being converged with high-temperature fuel gas sequentially passing through the fuel turbine and the oxidant turbine and then entering the fuel gas generator; liquid methane is adopted for precooling incoming flow, the total temperature of incoming flow behind an air inlet channel is effectively reduced, the upper limit of the working Mach number of the turbine core machine can be expanded to be larger than Ma3.5, a stamping mode matched with the turbine core machine only needs to consider the working speed range larger than Ma3.5, and the working performance of the turbine core machine can be well released.

The utility model provides a full supercooled liquid methane filling system. The full supercooled liquid methane filling system comprises a refrigerant filling module, a supercooled liquid methane module and a liquid methane filling module. Wherein the refrigerant filling module is connected with a liquid methane supercooling storage tank of the supercooling liquid methane module through a filling pipeline and is used for supercooling liquid methane in the liquid methane storage tank. And the supercooled liquid methane module is connected with the liquid methane filling module through a pipeline and is used for filling cooled liquid methane into the rocket storage tank. The liquid methane supercooling storage tank comprises a liquid methane storage tank and a heat preservation layer located outside the liquid methane storage tank, and a refrigerant interlayer is arranged between the liquid methane storage tank and the heat preservation layer and used for containing the refrigerant provided by the refrigerant filling module and cooling liquid methane in the liquid methane storage tank. According to the filling system, the liquid methane supercooling efficiency can be improved, liquid methane crystallization is avoided, the supercooling process is stable and efficient, and the economic benefit of the supercooling filling process is high.

The application discloses an online liquid methane preparation full-subcooling filling process, which comprises a liquid methane storage device, a pressurizing pipeline, a liquid methane subcooling filling device, a filling pipeline, a liquid methane discharge device and a discharge pipeline. The output end of the liquid methane storage device is connected with the input end of the pressurizing pipeline, the output end of the pressurizing pipeline is connected with the input end of the filling pipeline, and the filling pipeline is connected with a first filling branch and a second filling branch after passing through the liquid methane subcooling filling device. The first filling branch is used for being connected with a liquid methane storage tank on an arrow, and the second filling branch is used for being connected with the input end of the discharge pipeline. The output end of the discharge pipeline is connected with the liquid methane discharge device, and a discharge pipeline adjusting valve and a flow measuring instrument are arranged on the discharge pipeline. The system can guarantee stable liquid methane flow, avoid the risk of crystallization of subcooling liquid methane due to too low temperature, and realize full-subcooling filling of liquid methane.

The invention provides a two-component injector based on liquid oxygen and liquid methane and an attitude control engine. The injector at least comprises an injection disc, a spark plug, a liquid oxygen collecting cavity and a liquid methane collecting cavity. The injection disc is of a double-layer panel structure with a closed cavity, a plurality of connecting columns are arranged in the cavity, and the connecting columns are uniformly distributed and connected between the upper-layer panel and the lower-layer panel; at least part of the connecting columns are provided with injection holes penetrating through the upper-layer panel and the lower-layer panel. The liquid oxygen collecting cavity and the liquid methane collecting cavity are arranged on the outer end face of the upper-layer panel and are respectively communicated with the spray pipe through injection holes formed in the connecting columns; cooling holes communicated with the liquid methane collecting cavity, the cavity and the spray pipe are formed in the upper-layer panel and the lower-layer panel. The liquid methane entering the double-layer panel structure is used for cooling the injector.

A process for producing liquid methane with a reduced content of higher hydrocarbons, comprising the steps of: providing a stream of natural gas containing a mixture of ethane and higher hydrocarbons; cooling the mixture in a first heat exchanger passage; passing the cooled mixture to a gas expander; passing an outlet stream from the gas expander to a separator having a vapor outlet stream and a liquid outlet stream; compressing the vapor outlet stream; cooling the compressed vapor stream in a second heat exchanger passage to form a first liquefied methane product having a reduced content of higher hydrocarbons, wherein the liquid outlet stream from the separator forms a second liquefied methane product having an increased content of higher hydrocarbons.

Process for producing liquid methane with a reduced content of higher hydrocarbons comprising providing a stream 1 of natural gas containing ethane and higher hydrocarbons cooling the resulting mixtur

The application provides a filter pipeline automatic flushing and pressure regulating method, which can automatically identify the blockage of a filter and corresponding pipeline and automatically clean the filter without removing the filter from a pipeline system, thereby avoiding the risk of adding extra substances in the pipeline system, and particularly reducing the risk of water vapor entering a liquid oxygen and liquid methane pipeline system. The filter pipeline automatic flushing and pressure regulating method can also compensate for the pressure loss of fluid after passing through the filter, solve the problem of pressure difference before and after the filter, and meet the test scene with strict requirements on fluid pressure loss. All functions of the method can be automatically controlled, which greatly shortens the operation time, saves the labor cost, and reduces the possibility of adding extra substances in the pipeline system.

A system and method for preparing and supplying a densified liquid oxidant to a spacecraft launch facility is provided. Liquid oxygen streams obtained from co-located air separation devices for liquid preparation are densified in an integrated densification system of two refrigeration stages. The first refrigeration stage is a nitrogen-based inverse Brayton cycle refrigeration cycle that provides refrigeration to the second refrigeration stage. The second refrigeration stage is a refrigerant circuit comprising helium and / or neon that densifies the liquid oxygen to a temperature between about 70 Kelvin and 57 Kelvin. The integrated densification system may also be configured to densify liquid methane or other propellants used in a spacecraft.

The invention provides a methane subcooler. The methane subcooler comprises a shell, a methane subcooling heat exchange assembly and a nitrogen heat exchange assembly. The shell is filled with liquid nitrogen with a preset liquid level; the methane supercooling heat exchange assembly is arranged in the shell and is used for introducing liquid methane; the nitrogen heat exchange assembly is arranged in the shell and used for introducing nitrogen. The nitrogen heat exchange assembly can heat the liquid nitrogen to the boiling point temperature under the preset pressure, so that the liquid nitrogen exchanges heat with liquid methane in the methane supercooling heat exchange assembly at the boiling point temperature under the preset pressure. The nitrogen heat exchange assembly is used for heating the liquid nitrogen, so that the boiling temperature of the liquid nitrogen ranges from-180 DEG C to-165 DEG C under the pressure of 0.4-0.7 MPa, the temperature difference between the liquid nitrogen and the liquid methane is reduced, the liquid methane cannot be solidified and frozen, and then the completeness of a filling pipeline and system equipment is guaranteed.

A process and apparatus (100) for producing nitrogen-purified liquid methane from a feed gas stream (1) containing at least 98 mol% methane and between 0.1 and 2 mol% nitrogen, wherein the feed gas stream (1) is cooled to a temperature between 110 K and 200 K in a first counter-current heat exchanger (3) with a nitrogen vapor stream (9) to produce a cooled stream (5), a liquid nitrogen bath (21) is in heat exchange with the cooled stream (5) via a second heat exchanger (7) through which the cooled stream (5) passes, the liquid nitrogen bath (21) producing nitrogen vapor (9) supplied to the first heat exchanger (3) to produce the cooled stream, the cooled stream (5) exiting the second heat exchanger (7) is introduced into a distillation column (11) for distillation, and a liquid (13) containing at least 99.5% mol, preferably at least 99.9% mol,Methane is drawn off from the distillation column (11) in the tank as the final product. (Shorthand figure: Fig. 1)

The present application relates to a kind of liquefied natural gas preparation system and its preparation method, specifically to a kind of engineering large-scale back pressure supercooled liquid methane preparation system and preparation method, solve the existing LNG when storage, transfer, the method for selecting LNG supercooling is prone to excessive heat exchange, cause LNG to be frozen after plugging heat exchanger, lead to using liquid nitrogen to join heat exchanger heat exchange efficiency is low, the technical problem of large-scale preparation supercooled liquid methane cost increase.This engineering large-scale back pressure supercooled liquid methane preparation method, including liquid methane supercooling device, vacuum extraction device, liquid nitrogen gasification device, liquid accumulator and liquid nitrogen pump;Vacuum extraction device's injection medium mouth is connected with external nitrogen source, and its outlet is connected with liquid methane supercooling device;The inlet of liquid nitrogen gasification device is connected with the outlet of liquid nitrogen pump, and the outlet of liquid nitrogen gasification device is connected with the inlet of liquid accumulator;The outlet of liquid accumulator is connected with liquid methane supercooling device;Realize the supercooling of large-scale LNG.

The invention provides a refrigerating system for a Mars in-situ propellant preparation and storage process, which comprises a gas-liquid separation storage tank, a compressor, an aftercooler, a heat regenerator, a first throttle valve, a carbon dioxide capture module, a liquid oxygen storage tank, a liquid methane storage tank and a fan, and is characterized in that the heat regenerator comprises a high-pressure refrigerant flow channel, a low-pressure refrigerant flow channel, an oxygen flow channel and a methane flow channel; gaseous oxygen is liquefied in the oxygen flow channel and then stored in the liquid oxygen storage tank, and gaseous methane is liquefied in the methane flow channel and then stored in the liquid methane storage tank; the carbon dioxide capturing module comprises a refrigerant flow channel and a carbon dioxide flow channel, a refrigerant of the refrigerant flow channel is used for providing cooling capacity for carbon dioxide freezing capturing, fluid of the carbon dioxide flow channel is Mars atmosphere, and the Mars atmosphere is introduced into the carbon dioxide capturing module through a fan. According to the refrigerating system, integrated cooling of carbon dioxide capture, methane liquefaction and oxygen liquefaction can be achieved, and the complexity of system configuration is reduced.

The invention provides a multifunctional test system for a liquid oxygen methane engine test bed. The multifunctional test system comprises a gas path system, a liquid path system, a test station and a control module. Wherein the gas path system and the liquid path system are connected through a pipeline for gas supply, the liquid path system is connected with the test run station and used for providing liquid fuel needed by testing for the test run station, and the control module is connected with and controls operation of the gas path system and the liquid path system. The liquid path system comprises a liquid oxygen storage module, a liquid methane storage module, a liquid oxygen supercooling module, a liquid methane supercooling module, a liquid oxygen conveying module and a liquid methane conveying module. The multifunctional test system is composed of a set of gas path system, two sets of liquid path systems and two test run stations. The two sets of liquid path systems comprise the high-low pressure liquid oxygen liquid path module and the high-low pressure liquid methane liquid path module, one set of gas path system is adopted for gas supply, medium conveying can be carried out according to requirements, resource sharing of test equipment is improved, the total cost of equipment construction and maintenance is reduced, and the engine test efficiency is improved.

The utility model belongs to the technical field of chemical production equipment, and particularly relates to a device for recycling methane in liquid nitrogen wash feed gas, which comprises a liquid nitrogen wash feed gas system, a feed gas separator, a nitrogen wash tower, a liquid methane pump, a high-pressure nitrogen cooler, a first feed gas cooler, a second feed gas cooler and a methane gas pipe network, the liquid nitrogen wash raw material gas system is connected with a raw material gas separator through a raw material gas pipeline, the raw material gas pipeline penetrates through a first raw material gas cooler and a second raw material gas cooler, and the raw material gas separator is connected to the lower section of a nitrogen wash tower through a first outlet pipeline and connected to the inlet end of a liquid methane pump through a second outlet pipeline. The nitrogen washing tower is connected to the second outlet pipeline through a first methane pipeline, and the outlet end of the liquid methane pump is connected to the methane gas pipe network through a second methane pipeline. The device overcomes the defect of high energy consumption of the original process, can greatly reduce the energy consumption, reduces the production cost, and achieves the purpose of energy conservation.

The invention provides a full supercooled liquid methane filling system. The full supercooled liquid methane filling system comprises a refrigerant filling module, a supercooled liquid methane module and a liquid methane filling module. Wherein the refrigerant filling module is connected with a liquid methane supercooling storage tank of the supercooling liquid methane module through a filling pipeline and is used for supercooling liquid methane in the liquid methane storage tank. And the supercooled liquid methane module is connected with the liquid methane filling module through a pipeline and is used for filling cooled liquid methane into the rocket storage tank. The liquid methane supercooling storage tank comprises a liquid methane storage tank and a heat preservation layer located outside the liquid methane storage tank, and a refrigerant interlayer is arranged between the liquid methane storage tank and the heat preservation layer and used for containing the refrigerant provided by the refrigerant filling module and cooling liquid methane in the liquid methane storage tank. According to the filling system, the liquid methane supercooling efficiency can be improved, liquid methane crystallization is avoided, the supercooling process is stable and efficient, and the economic benefit of the supercooling filling process is high.

The utility model provides a storage tank structure for storing liquid methane. The storage tank structure comprises a storage tank and an oscillator, the storage box is used for storing liquid methane; the oscillator is arranged in the storage box, and the oscillator vibrates to enable liquid in the storage box to vibrate. According to the storage tank structure, the liquid methane is vibrated through the oscillator, so that the mixing and dissolving speed of the liquid methane and nitrogen can be reduced, and the pressure in the storage tank is ensured.

The invention belongs to the technical field of chemical process tail gas treatment, and particularly relates to a hydrogen-containing tail gas and carbon dioxide tail gas utilization device. In order to improve the utilization efficiency of hydrogen-containing tail gas and carbon dioxide tail gas and reduce the problems of environmental pollution and the like, the hydrogen-containing tail gas, the carbon dioxide tail gas and coke oven gas are introduced into an adsorption tower, and adsorbed raw material gas enters a pre-hydrogenation reactor through a supercharger, a first separator and a feeding and discharging heat exchanger; after hydrogenation reaction, the gas passes through a first-stage hydrogenation reactor, a medium-temperature desulfurization reactor, a second-stage hydrogenation reactor, a fine desulfurization reactor and a feeding and discharging heat exchanger, after heat exchange, the gas is condensed by a water cooler and separated by a second separator, the gas enters a carbon dioxide removal tower for further purification, the purified gas enters a cryogenic separation device, and liquid methane is separated out; the tail gas utilization value is improved, economic benefits are increased, and carbon dioxide emission is reduced.

The present invention discloses a method for increasing the boiling point temperature of methane propellant, which relates to the field of cryogenic propellants. The method comprises: separating the carbon dioxide component in the Martian atmosphere and converting it into a liquid state, which is stored in a carbon dioxide storage tank; converting part of the liquid carbon dioxide in the carbon dioxide storage tank into a product gas containing gaseous methane; separating and purifying the product gas to obtain high-purity methane gas, converting it into liquid methane, and storing it in a methane storage tank; uniformly mixing the liquid carbon dioxide in the carbon dioxide storage tank with the liquid methane in the methane storage tank; and transporting the mixed product to a spacecraft tank via a pipeline. The overall boiling point temperature of the methane propellant containing liquid carbon dioxide is increased, thereby reducing the evaporation loss of the propellant during the spacecraft's navigation. In the in-situ preparation process of methane propellant on the Martian surface, the present invention utilizes captured liquid carbon dioxide as an additive medium to increase the boiling point of the methane propellant, and achieves the set target according to the colligative principle.

The application provides a full supercooled liquid methane filling system, which comprises a refrigerant filling module, a supercooled liquid methane module and a liquid methane filling module. The refrigerant filling module is connected with a liquid methane supercooling tank of the supercooled liquid methane module through a filling pipeline, and is used for supercooling the liquid methane in the liquid methane tank. The supercooled liquid methane module is connected with the liquid methane filling module through a pipeline, and is used for filling the rocket tank with the supercooled liquid methane. The liquid methane supercooling tank comprises a liquid methane tank and a heat preservation layer outside the liquid methane tank, and a refrigerant interlayer is arranged between the liquid methane tank and the heat preservation layer, which is used for containing the refrigerant provided by the refrigerant filling module and cooling the liquid methane in the liquid methane tank. The filling system can improve the supercooling efficiency of the liquid methane, and the liquid methane will not crystallize. The supercooling process is stable and efficient, and the supercooling filling process has high economic benefits.

The utility model provides a control system for a blasting test of a rocket tank. The control system comprises a water injection and supplement control device, an oxygen tank pressurization control device and a combustion tank pressurization control device, the rocket stainless steel storage tank is of a common-bottom structure, and an oxygen tank on the upper portion of the storage tank is used for being filled with liquid oxygen propellants. The combustion box at the lower part of the storage box is used for filling a liquid methane propellant; the oxygen box and the combustion box are both connected with the water supply storage box; the water supply storage tank is used for providing a water source for liquid pressurization for the oxygen tank and the combustion tank; the water injection and supplement control device is used for controlling water injection cans of the water supply storage tank, the oxygen tank and the combustion tank; the oxygen tank pressurization control device is used for controlling the water supply storage tank to perform water injection step-by-step pressurization on the oxygen tank; the combustion box pressurization control device is used for controlling the water supply storage box to conduct water injection step-by-step pressurization on the combustion box. Therefore, the pressurized internal pressure bursting test of the stainless steel storage tank of the rocket is completed. According to the utility model, on-line automatic control can be carried out on the pressurized internal pressure bursting test of the stainless steel storage tank of the rocket, and the test working efficiency and the test control accuracy can be improved.

The application provides a full supercooled liquid methane filling method, which comprises the following steps: cold agent transfer filling: a cold agent tank truck fills cold agent into a cold agent filling module through a pipeline; cold agent filling: the cold agent filling module connects a liquid methane supercooling tank of a supercooled liquid methane module through a filling pipeline, and cold agent filling is performed; liquid methane transfer filling: a liquid methane tank truck fills liquid methane into the liquid methane supercooling tank of the supercooled liquid methane module through a pipeline; liquid methane supercooling: liquid methane in the liquid methane supercooling tank is cooled by heat exchange with the cold agent through a spaced metal wall; supercooled liquid methane filling: the supercooled liquid methane module is connected to a liquid methane filling module through a pipeline, and the liquid methane supercooling tank is pressurized to fill the liquid methane cooled in the liquid methane supercooling tank into a rocket tank; the liquid methane supercooling tank comprises a liquid methane tank and a heat preservation layer outside the liquid methane tank, and a cold agent interlayer is arranged between the liquid methane tank and the heat preservation layer to accommodate the cold agent provided by the cold agent filling module and cool the liquid methane in the liquid methane tank. The filling system can improve the liquid methane supercooling efficiency, does not cause liquid methane crystallization, and is stable and efficient in the supercooling process and has high economic benefits in the supercooled filling process.

The utility model discloses a cryogenic separation device of a methane tower, which comprises a separation cavity main body, a liquid inlet, a gas outlet channel and a fixed plate, and is provided with an extraction device, and liquid methane is heated through a heat conduction pipe to form gas methane which reaches the gas outlet channel through a connecting pipe to be discharged. A medium in a heating cavity is heated through a heater, through the arrangement, the heat temperature of a heat conduction pipe can be guaranteed, normal conversion can be guaranteed, and the efficiency is improved, through attraction force generated by an electromagnet to an electromagnetic block, the electromagnetic block moves towards the electromagnetic block, and when the electromagnetic block moves, a movable plate is driven to move; when the movable plate moves, the stop block is driven to move, when the stop block moves, limitation on the fixed plate is cancelled, then the connecting pipe is taken out when the connecting pipe blocks, and through the arrangement, connection between the connecting pipe and the reaction cavity can be conveniently and rapidly cancelled, so that the reaction cavity is conveniently maintained, the replacement efficiency is improved, and the working efficiency can be guaranteed.

This invention discloses a system for the integrated utilization of liquid oxygen and liquid methane, comprising a liquid oxygen component, a liquid methane component, a combustion energy component, a second heat exchanger, an oxygen storage tank component, a methane storage tank component, and a CO2 storage tank component. The inlet end of the combustion energy component is connected to the liquid oxygen component and the liquid methane component. CO2 generated after the liquid oxygen and liquid methane are mixed and combusted in the combustion energy component is input to the inlet end of the second heat exchanger via a pipeline. The liquid oxygen component and the liquid methane component are also connected to the inlet end of the second heat exchanger, and the outlet end of the second heat exchanger is connected to the oxygen storage tank component, the methane storage tank component, and the liquid CO2 storage tank component, respectively. This invention also discloses a method for using the integrated utilization system of liquid oxygen and liquid methane. The beneficial effects of this invention are: carbon capture and zero emissions are achieved; the system has multiple products, high comprehensive utilization rate, and good economic benefits.

The application belongs to the technical field of cryogenic propellant filling, and discloses a test system and method for testing liquid methane transient filling of a large-capacity cavity pipeline, wherein the test system for testing liquid methane transient filling of a large-capacity cavity pipeline comprises a liquid methane storage unit, a liquid methane supply unit, a nitrogen supply unit, a liquid methane pressurizing unit, a liquid methane filling unit, a liquid methane recovery unit, a liquid methane PLC control unit, a liquid methane visual observation unit and a data monitoring unit; the application can carry out test and measurement on the process of filling a large-capacity cavity pipeline at room temperature by liquid methane, and obtain the pipeline flow rate and the temperature and pressure values of each section of the pipeline during the filling process, so as to accurately predict the changes of each physical quantity in the pipeline during the starting process of a rocket engine and determine a reasonable ignition timing.

The invention discloses an intelligent emergency cut-off valve for a liquid methane tank container and belongs to the technical field of low-temperature valves. The device comprises a pneumatic actuator and a stop valve which serve as control components, the end of a piston column of the pneumatic actuator is connected with a guide rail sliding block, a guide rail track frame is arranged in cooperation with the guide rail sliding block, the top of the guide rail sliding block is rotationally connected with one end of an upper connecting rod, and the other end of the upper connecting rod is connected with the top end of a rotatable outer cylindrical cam of a cylindrical cam mechanism. An inner limiting rack of the cylindrical cam mechanism is fixed to an outer rack, an outer cylindrical cam can rotate outside the inner limiting rack, the upper end of a valve rod of the stop valve is hinged to one end of a lower connecting rod, a roller is arranged at the other end of the lower connecting rod, and the roller is located in a cam groove in the outer wall of the outer cylindrical cam and can move along an inner rail of the cam groove. Remote transmission between the control element and the stop valve can be achieved, the control element is effectively protected, and the control precision of the control element on the stop valve is improved.

The invention discloses a device and a method for co-producing nitrogen, hydrogen, CO gas and LNG (Liquefied Natural Gas) from synthesis gas, and belongs to the technical field of synthesis gas co-production. The device comprises a main heat exchanger, a liquid methane washing tower, a liquid nitrogen washing tower, a stripping tower, a methane rectifying tower, a reboiler and a methane rectifying tower condenser which are arranged in a cold box, and a circulating compressor outside the cold box, after carbon monoxide in upstream synthesis gas is washed and removed through the liquid methane washing tower, nitrogen and hydrogen are separated through the liquid nitrogen washing tower; methane liquid at the bottom of the liquid methane washing tower sequentially passes through a stripping tower and a methane rectifying tower to obtain CO gas and LNG. The device solves the problems that in the prior art, a liquid nitrogen washing device is low in yield, too large in nitrogen consumption and the like.

The present invention relates to the technical field of ammonia preparation devices, specifically a device for co-producing hydrogen and methane by coupling coal gasification and coal coking, which includes an exhaust gas purification tower. The exhaust gas purification tower is correspondingly arranged with an acetylene cracking furnace mixer, and a methanation catalytic reaction kettle, a liquefaction tank, and a gas mixing and preheating tank are successively arranged between the exhaust gas purification tower and the acetylene cracking furnace mixer. Moreover, the exhaust gas purification tower, the methanation catalytic reaction kettle, the liquefaction tank, the gas mixing and preheating tank, and the acetylene cracking furnace mixer are successively connected through pipelines. The beneficial effects are as follows: The device and process method for co-producing hydrogen and methane by coupling coal gasification and coal coking proposed by the present invention realize that the coke oven gas undergoes deammoniation, debenzolation, wet crude desulfurization, dry fine desulfurization, methanation, removal of carbon monoxide and high-carbon hydrocarbons, and finally cryogenic separation to produce liquid methane with a purity of more than 98%. At the same time, the by-products are clean H2 and N2 mixed gases for ammonia synthesis production.