CN217953246U - Gas waste heat recycling device of coal hydrogen production system conversion device - Google Patents
Gas waste heat recycling device of coal hydrogen production system conversion device Download PDFInfo
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- CN217953246U CN217953246U CN202222344549.5U CN202222344549U CN217953246U CN 217953246 U CN217953246 U CN 217953246U CN 202222344549 U CN202222344549 U CN 202222344549U CN 217953246 U CN217953246 U CN 217953246U
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Abstract
The utility model belongs to a gas waste heat recycling device of a coal hydrogen production system conversion device; the system comprises a first conversion device heat exchanger of a coal hydrogen production system, wherein a secondary line process gas outlet of the first conversion device heat exchanger is connected with an inlet of an ammonia washing tower through a first tube side of the first heat exchanger and a first tube side of a second heat exchanger in sequence; a stripping waste gas outlet of the shift stripping device is connected with the gas-liquid separator sequentially through a second tube side of the first heat exchanger and a second tube side of the second heat exchanger; a shell side inlet of the second heat exchanger is connected with a normal temperature water outlet in the water treatment system, a shell side outlet of the second heat exchanger is connected with a shell side inlet of the first heat exchanger, and a shell side outlet of the first heat exchanger is connected with a shell side of the reboiler; the heat recovery device has the advantages of simple structure, reasonable design, capability of effectively recovering low-grade heat and reduction of dependence and consumption of the reboiler on external steam.
Description
Technical Field
The utility model belongs to the technical field of the gaseous waste heat recovery of conversion equipment, in particular to coal hydrogen system conversion equipment's gaseous waste heat recycles device.
Background
In order to improve the utilization rate of waste heat of process gas in the current domestic conversion device process of the coal-to-hydrogen system, the high-temperature process gas is used for by-product medium-pressure steam, secondary medium-pressure steam, low-pressure steam, heating boiler water supply and heating desalted water in sequence according to the temperature level, and finally the high-temperature process gas is cooled by circulating water in a water cooler to reduce the temperature to 40 ℃, so that a large amount of low-level heat energy is wasted; meanwhile, the temperature of the stripping waste gas in the shift stripping device is generally about 115-125 ℃, and the temperature cannot be reused due to low taste; meanwhile, the heat required by the reboiler of the low-temperature methanol washing process is mainly supplied by using 0.5MPa steam, so that the problem of high steam consumption is caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect among the prior art, and provide a process gas that utilizes among the coal hydrogen manufacturing system and the low level heat that the steam stripping waste gas of transform steam stripping device contains, through washing the heat that the reboiler provided in the device for low temperature methyl alcohol to when realizing recycling the low level heat, reduce low temperature methyl alcohol and wash the device and recycle the device to the gas waste heat of the coal hydrogen manufacturing system conversion device of outside steam consumption.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a gas waste heat recycling device of a conversion device of a coal-to-hydrogen system comprises a first conversion device heat exchanger of the coal-to-hydrogen system, wherein a secondary process gas outlet of the first conversion device heat exchanger is connected with an inlet of an ammonia washing tower sequentially through a first tube side of the first heat exchanger and a first tube side of a second heat exchanger; a stripping waste gas outlet of the shift stripping device is connected with the gas-liquid separator sequentially through a second tube side of the first heat exchanger and a second tube side of the second heat exchanger; the shell side inlet of the second heat exchanger is connected with a normal temperature water outlet in the water treatment system, the shell side outlet of the second heat exchanger is connected with the shell side inlet of the first heat exchanger, and the shell side outlet of the first heat exchanger is connected with the shell side of the reboiler.
Preferably, a first tee joint is arranged between the first tube side of the first heat exchanger and the first tube side of the second heat exchanger, and the third end of the first tee joint is connected with a secondary line process gas outlet of a second conversion device heat exchanger of the coal hydrogen production system.
Preferably, a second tee joint and a second valve are arranged between the secondary line process gas outlet of the second conversion device heat exchanger and a third end of the first tee joint; a third tee joint and a first valve are sequentially arranged between the process gas outlet of the secondary line of the first conversion device heat exchanger and the first tube pass of the first heat exchanger; and a third valve is arranged between the third end of the second tee joint and the third end of the third tee joint.
Preferably, a fourth tee joint is arranged between a stripping waste gas outlet of the shift stripping device and the second tube side of the first heat exchanger, and a fifth tee joint is arranged between the second tube side of the first heat exchanger and the second tube side of the second heat exchanger; and a fourth valve is arranged between the third end of the fourth tee joint and the third end of the fifth tee joint.
Preferably, a sixth tee joint is arranged between the fifth tee joint and the second tube side of the second heat exchanger, a seventh tee joint is arranged between the second tube side of the second heat exchanger and the gas-liquid separator, and a fifth valve is arranged between the third end of the sixth tee joint and the third end of the seventh tee joint.
Preferably, the gas-phase outlet of the gas-liquid separator is respectively connected with a combustion torch, a sulfur recovery system and a combustion gas inlet of a boiler; and a liquid phase outlet of the gas-liquid separator is connected with a coal grinding water inlet of the coal grinding machine.
Preferably, an eighth tee joint is arranged between the shell side outlet of the second heat exchanger and the shell side inlet of the first heat exchanger; and a shell-side outlet of the reboiler is connected with a third end of the eighth tee joint through a pipeline pump and a sixth valve.
Preferably, the tube side inlet and the tube side outlet of the reboiler are connected with the tower kettle of the heat regeneration tower in the low-temperature methanol washing device.
Preferably, a ninth tee joint is arranged between the shell side outlet of the first heat exchanger and the shell side of the reboiler, and a third end of the ninth tee joint is connected with a device for supplying hot water or heat through a seventh valve.
According to the gas waste heat recycling device of the conversion device of the coal-to-hydrogen system, the first heat exchanger and the second heat exchanger are arranged, so that the gas in the conversion device of the coal-to-hydrogen system and the stripping waste gas of the conversion stripping device can be subjected to gradual heat exchange, and normal-temperature water can be gradually preheated, so that the aim of meeting the requirement of a reboiler is fulfilled; the heat recovery device has the advantages of simple structure, reasonable design, capability of effectively recovering low-grade heat and reduction of dependence and consumption of the reboiler on external steam.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
In the upper diagram:
1. a first shift device heat exchanger; 2. a second shift device heat exchanger; 3. an ammonia washing tower; 4. a first heat exchanger; 5. a second heat exchanger; 6. a shift stripping unit; 7. a pipeline pump; 8. a water treatment system; 9. a gas-liquid separator; 10. a reboiler; 11. a thermal regeneration column; 12. a device for supplying hot water or heat; 13. a first valve; 14. a second valve; 15. a third valve; 16. a fourth valve; 17. a sixth valve; 18. a seventh valve; 19. a fifth valve; 20. a first tee joint; 21. a second tee joint; 22. a third tee joint; 23. a fourth tee joint; 24. a fifth tee joint; 25. a sixth tee joint; 26. a seventh tee joint; 27. an eighth tee joint; 28. a ninth tee joint; 29. burning a torch; 30. a sulfur recovery system; 31. a combustion gas inlet; 32. a coal grinding water inlet of the coal grinding machine.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to limit the invention to the precise embodiments disclosed. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the utility model relates to a gas waste heat recycling device of a conversion device of a coal hydrogen production system, which comprises a first conversion device heat exchanger 1 of the coal hydrogen production system, wherein a secondary process gas outlet of the first conversion device heat exchanger 1 is connected with an inlet of an ammonia washing tower 3 through a first tube pass of a first heat exchanger 4 and a first tube pass of a second heat exchanger 5 in sequence; a stripping waste gas outlet of the shift stripping device 6 is connected with the gas-liquid separator 9 through a second tube side of the first heat exchanger 4 and a second tube side of the second heat exchanger 5 in sequence; the shell side inlet of the second heat exchanger 5 is connected with the normal temperature water outlet in the water treatment system 8, the shell side outlet of the second heat exchanger 5 is connected with the shell side inlet of the first heat exchanger 4, and the shell side outlet of the first heat exchanger 4 is connected with the shell side of the reboiler 10. The utility model mainly uses the gas of the coal hydrogen production system and the steam stripping waste gas in the conversion steam stripping device 6 to gradually preheat the normal temperature water in the water treatment system 8 so as to meet the working requirement of the reboiler 10; the gas of the coal hydrogen production system in the utility model can come from the process gas in the synthetic ammonia system or the methanol synthesis production system, the process gas refers to the converted gas or the unchanged gas in the conversion device, the temperature is 120-230 ℃, and the pressure is 5.0-6.0 Mpa; the pressure of the stripping waste gas of the transformation stripping device 6 in the utility model is 0.1-0.2MPaG, and the temperature is 115-125 ℃; the temperature of normal temperature water in the water treatment system 8 is 25-40 ℃, and the pressure is 0.4-1.6 Mpa; the pressure of the normal temperature water after passing through the first heat exchanger 4 and the second heat exchanger 5 is 0.4-1.6 Mpa, and the temperature is 105-120 ℃. As can be seen from the above, the present invention can effectively utilize the low-grade gas and reduce the steam consumption of the reboiler 10.
Further, a first tee 20 is arranged between the first tube side of the first heat exchanger 4 and the first tube side of the second heat exchanger 5, and the third end of the first tee 20 is connected with a secondary line process gas outlet of the second conversion device heat exchanger 2 of the coal hydrogen production system. The secondary line process gas of the heat exchanger 2 of the second conversion device of the coal hydrogen production system in the utility model is converted gas or unconverted gas, the temperature is 60-120 ℃, and the pressure is 4.9-5.9 MPa; it is noted that the composition of the process gas needs to be the same as the gas composition in the first shift converter heat exchanger 1, and that the gas pressure in the second shift converter heat exchanger 2 is lower than the gas pressure in the first shift converter heat exchanger 1 during actual production.
Further, a second tee 21 and a second valve 14 are arranged between the secondary line process gas outlet of the second conversion device heat exchanger 2 and the third end of the first tee 20; a third tee joint 22 and a first valve 13 are sequentially arranged between the secondary line process gas outlet of the first conversion device heat exchanger 1 and the first tube pass of the first heat exchanger 4; and a third valve 15 is arranged between the third end of the second tee 21 and the third end of the third tee 22. The utility model discloses an above-mentioned setting can conveniently adjust the temperature of the first tube side of first heat exchanger 4 and the temperature of the first tube side of second heat exchanger 5 to reach the characteristics of carrying out nimble adjustment to the temperature of normal atmospheric temperature water, the aperture of first valve 13 specifically says so is bigger, the volume of getting into the first tube side of first heat exchanger 4 is just more, thereby reach the purpose that improves the temperature of the first tube side of first heat exchanger 4, the aperture of first valve 13 is smaller the volume of getting into the first tube side of first heat exchanger 4 is just less, and reach the purpose that reduces the temperature of the first tube side of first heat exchanger 4; similarly, when the temperature of the first tube pass of the second heat exchanger 5 needs to be adjusted, the adjustment can be performed through the second valve 14; in addition, because the temperature of gas in the second conversion device heat exchanger 2 is not higher than the gas temperature in the first conversion device heat exchanger 1, in order to improve the adjustment interval of the first tube side temperature of second heat exchanger 5, the utility model discloses a form of the nearly way pipeline of taking third valve 15 is set up to gas in the second conversion device heat exchanger 2 is the basis, mixes with the gas of second conversion device heat exchanger 2 in getting into the second tee bend 21 by the gas in the first conversion device heat exchanger 1, improves gas temperature to realize improving the purpose of the first tube side temperature of second heat exchanger 5.
Further, a fourth tee 23 is arranged between a stripping waste gas outlet of the shift stripping device 6 and the second tube side of the first heat exchanger 4, and a fifth tee 24 is arranged between the second tube side of the first heat exchanger 4 and the second tube side of the second heat exchanger 5; a fourth valve 16 is arranged between the third end of the fourth tee 23 and the third end of the fifth tee 24. According to the common knowledge in the art, when the temperature of the stripping off gas is lower than 60 ℃, the crystallization phenomenon of ammonium salt is easy to occur, thereby causing the defect of influencing the service life of the gas-liquid separator 9; the temperature of the stripping waste gas can be adjusted through the arrangement, and meanwhile, the heat exchange of the normal-temperature water is prevented from being influenced; specifically, when the temperature of the stripping waste gas at the stripping waste gas outlet of the shift stripping device 6 is low, in order to avoid influencing the heat exchange of the normal-temperature water, most of the stripping waste gas directly enters the second tube side of the second heat exchanger 5 through the fourth valve 16, so as to directly preheat the normal-temperature water; and the purpose of adjusting the gas temperature at the outlet of the second tube side of the second heat exchanger 5 is achieved, so that the gas temperature is in the temperature range of 60-70 ℃.
Further, a sixth tee 25 is arranged between the fifth tee 24 and the second tube pass of the second heat exchanger 5, a seventh tee 26 is arranged between the second tube pass of the second heat exchanger 5 and the gas-liquid separator 9, and a fifth valve 19 is arranged between the third end of the sixth tee 25 and the third end of the seventh tee 26. Through the arrangement of the fifth valve 19, when the temperature at the outlet of the second tube side of the second heat exchanger 5 is too high (or too low), the material enters the second tube side of the second heat exchanger 5 through the fifth valve 19 to exchange heat again, so that the material is ensured to be in the temperature range of 60-70 ℃.
Further, the gas phase outlet of the gas-liquid separator 9 is connected with a combustion torch 29, a sulfur recovery system 30 and a combustion gas inlet 31 of a boiler, respectively; the liquid phase outlet of the gas-liquid separator 9 is connected with a coal grinding water inlet 32 of a coal grinding machine. The stripped waste gas of the shift stripping device 6 enters a gas-liquid separator 9 for gas-liquid separation after heat exchange in a first heat exchanger 4 and a second heat exchanger 5, the separated gas phase is acid gas, and the acid gas can be burnt by a burning torch 29, enters a sulfur recovery system 30 for extracting sulfur and/or enters a burning gas inlet 31 of a boiler to be used as burning gas of the boiler; and the liquid phase after gas-liquid separation can be used as coal grinding water in a coal mill.
Further, an eighth tee 27 is arranged between the shell pass outlet of the second heat exchanger 5 and the shell pass inlet of the first heat exchanger 4; the shell side outlet of the reboiler 10 is connected to the third end of the eighth tee 27 through the pipe pump 7 and the sixth valve 17. The normal temperature water can enter the reboiler 10 to be used as a heat source after heat exchange is carried out through the first heat exchanger 4 and the second heat exchanger 5, and the used cooled water can enter the shell pass of the first heat exchanger 4 to be subjected to heat exchange again after being pressurized through the pipeline pump 7 so as to achieve the purpose of recycling.
Further, a tube side inlet and a tube side outlet of the reboiler 10 are connected with a tower kettle of a heat regeneration tower 11 in the low-temperature methanol washing device.
Further, a ninth tee 28 is arranged between the shell side outlet of the first heat exchanger 4 and the shell side of the reboiler 10, and a third end of the ninth tee 28 is connected with the hot water or heat supply device 12 through a seventh valve 18. The hot water or heat supply device 12 of the present invention can provide hot water for other devices, or provide heat energy for enterprises or residents.
The utility model discloses a theory of operation does: the converted gas or unconverted gas in a first conversion device heat exchanger 1 of the coal hydrogen production system enters a first tube pass of a first heat exchanger 4 for heat exchange and temperature reduction, enters a first tube pass of a second heat exchanger 5 for heat exchange and temperature reduction again after heat exchange and temperature reduction, and finally enters an ammonia washing tower 3 to be used as effective gas for synthesizing ammonia and methanol; the stripping waste gas at the stripping waste gas outlet of the conversion stripping device 6 is subjected to heat exchange and temperature reduction through the second tube side of the first heat exchanger 4 and the second tube side of the second heat exchanger 5, the cooled stripping waste gas enters the gas-liquid separator 9 for gas-liquid separation, the liquid phase after the gas-liquid separation is used as coal grinding water in the coal grinding mill, and the gas phase after the gas-liquid separation can enter a combustion torch 29 for combustion, enter a sulfur recovery system 30 for extracting sulfur and/or enter a combustion gas inlet 31 of the boiler for use as combustion gas of the boiler; further, in order to improve the utilization ratio of recovering the low-quality gas phase and adjust the first tube side temperature of the first tube side of the first heat exchanger 4 and the first tube side temperature of the second heat exchanger 5, the utility model discloses still utilized the transform gas or the unchanged gas in the second converter heat exchanger 2 of the converter of the synthetic ammonia or methanol synthesis system, the temperature of the process gas in the second converter heat exchanger 2 is not more than the temperature of the process gas in the second converter heat exchanger 2, the pressure of the process gas in the second converter heat exchanger 2 is less than the pressure of the process gas in the second converter heat exchanger 2, and the process gas in the second converter heat exchanger 2 and the first heat exchanger 4 and the second heat exchanger 5 are used and the temperature of the first heat exchanger 4 and the second heat exchanger 5 are adjusted through the cooperation of the opening degrees of the first valve 13, the second valve 14 and the third valve 15; meanwhile, in order to ensure that the temperature of the material entering the gas-liquid separator is in the range of 60-70 ℃, the utility model is also provided with a fourth valve 16 and a fifth valve 19, wherein the fourth valve 16 is mainly used for avoiding the problem that the temperature of the stripping waste gas is low to influence the heat exchange effect of the first heat exchanger 4 or cause the temperature of the material at the outlet of the second heat exchanger 5 to be too low; the fifth valve 19 is arranged to adjust the temperature of the material at the outlet of the second heat exchanger 5, and when the temperature of the material does not meet the interval temperature, the material can enter the second tube pass of the second heat exchanger 5 again for heat exchange; the utility model relates to a complete system, it not only need consider the problem of reboiler 10 normal operating, still need consider the concrete situation of process gas and the stripping waste gas of transform stripping device 6 in the transform device of coal hydrogen manufacturing system, when the operation of reboiler 10 can be satisfied to the volume of water after the heat transfer, the water after the heat transfer is whole to get into reboiler 10, send into the shell side internal heat transfer of second heat exchanger 5 after the water through reboiler 10 can pressurize through tubing pump 7, then realize reuse; when the amount of the heat exchange water is excessive, the hot water or the heat may be supplied to the hot water or the heat supplying apparatus 12 according to the actual state by adjusting the opening degree of the seventh valve 18. It should be noted that the composition of the gas in the second changer heat exchanger 2 and the composition of the gas in the first changer heat exchanger 1 as described in the present invention are substantially the same. Above-mentioned structural style has reasonable in design, can control the nature strong, can retrieve, reduce energy consumption to the heat of low grade to and realize the characteristics of recycling to technology gas and waste gas.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected," "connecting," and the like are to be construed broadly, and may be, for example, fixedly connected, integrally connected, or detachably connected; or communication between the interiors of the two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation. It should be noted that, in this document, "first", "second", etc. are used only for distinguishing one from another, and do not indicate their importance, order, etc. The above detailed description is only specific to the feasible embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments, modifications and alterations without departing from the spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a gas waste heat recycling device of coal hydrogen system conversion equipment, includes first conversion equipment heat exchanger (1) of coal hydrogen system, its characterized in that: the secondary line process gas outlet of the first conversion device heat exchanger (1) is connected with the inlet of the ammonia washing tower (3) through a first tube side of the first heat exchanger (4) and a first tube side of the second heat exchanger (5) in sequence;
a stripping waste gas outlet of the shift stripping device (6) is connected with the gas-liquid separator (9) through a second tube side of the first heat exchanger (4) and a second tube side of the second heat exchanger (5) in sequence;
the shell side inlet of the second heat exchanger (5) is connected with the normal temperature water outlet in the water treatment system (8), the shell side outlet of the second heat exchanger (5) is connected with the shell side inlet of the first heat exchanger (4), and the shell side outlet of the first heat exchanger (4) is connected with the shell side of the reboiler (10).
2. The gas waste heat recycling device of the conversion device of the coal-to-hydrogen system according to claim 1, characterized in that: and a first tee joint (20) is arranged between the first tube side of the first heat exchanger (4) and the first tube side of the second heat exchanger (5), and the third end of the first tee joint (20) is connected with a secondary line process gas outlet of a second conversion device heat exchanger (2) of the coal hydrogen production system.
3. The gas waste heat recycling device of the conversion device of the coal-to-hydrogen system according to claim 2, characterized in that: a second tee joint (21) and a second valve (14) are arranged between the secondary line process gas outlet of the second conversion device heat exchanger (2) and the third end of the first tee joint (20);
a third tee joint (22) and a first valve (13) are sequentially arranged between the secondary line process gas outlet of the first conversion device heat exchanger (1) and the first tube pass of the first heat exchanger (4);
a third valve (15) is arranged between the third end of the second tee joint (21) and the third end of the third tee joint (22).
4. The gas waste heat recycling device of the conversion device of the coal-to-hydrogen system according to claim 1, characterized in that: a fourth tee joint (23) is arranged between a stripping waste gas outlet of the shift stripping device (6) and the second tube side of the first heat exchanger (4), and a fifth tee joint (24) is arranged between the second tube side of the first heat exchanger (4) and the second tube side of the second heat exchanger (5);
a fourth valve (16) is arranged between the third end of the fourth tee joint (23) and the third end of the fifth tee joint (24).
5. The gas waste heat recycling device of the conversion device of the coal-to-hydrogen system according to claim 4, characterized in that: a sixth tee joint (25) is arranged between the fifth tee joint (24) and the second tube side of the second heat exchanger (5), a seventh tee joint (26) is arranged between the second tube side of the second heat exchanger (5) and the gas-liquid separator (9), and a fifth valve (19) is arranged between the third end of the sixth tee joint (25) and the third end of the seventh tee joint (26).
6. The gas waste heat recycling device of the conversion device of the coal-to-hydrogen system according to claim 1 or 5, characterized in that: the gas phase outlet of the gas-liquid separator (9) is respectively connected with a combustion torch (29), a sulfur recovery system (30) and a combustion gas inlet (31) of a boiler;
and a liquid phase outlet of the gas-liquid separator (9) is connected with a coal grinding water inlet (32) of the coal grinding machine.
7. The gas waste heat recycling device of the conversion device of the coal-to-hydrogen system according to claim 1, characterized in that: an eighth tee joint (27) is arranged between the shell pass outlet of the second heat exchanger (5) and the shell pass inlet of the first heat exchanger (4);
the shell side outlet of the reboiler (10) is connected with the third end of the eighth tee joint (27) through a pipeline pump (7) and a sixth valve (17).
8. The gas waste heat recycling device of the conversion device of the coal-to-hydrogen system according to claim 1 or 7, characterized in that: and a tube side inlet and a tube side outlet of the reboiler (10) are connected with a tower kettle of a heat regeneration tower (11) in the low-temperature methanol washing device.
9. The gas waste heat recycling device of the conversion device of the coal-to-hydrogen system according to claim 1, characterized in that: a ninth tee joint (28) is arranged between the shell pass outlet of the first heat exchanger (4) and the shell pass of the reboiler (10), and the third end of the ninth tee joint (28) is connected with a device (12) for supplying hot water or heat through a seventh valve (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222344549.5U CN217953246U (en) | 2022-09-01 | 2022-09-01 | Gas waste heat recycling device of coal hydrogen production system conversion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222344549.5U CN217953246U (en) | 2022-09-01 | 2022-09-01 | Gas waste heat recycling device of coal hydrogen production system conversion device |
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| CN202222344549.5U Active CN217953246U (en) | 2022-09-01 | 2022-09-01 | Gas waste heat recycling device of coal hydrogen production system conversion device |
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2022
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