Pre-purification debenzolization regeneration system

Abstract

The utility model relates to a pre-purification debenzolization regeneration system and belongs to the technical field of debenzolization. Comprising a pneumatic valve, a temperature sensor, a pre-purification regenerated gas heater, a plurality of debenzolization towers, a plurality of connecting pipelines and a controller. Regenerated gas is conveyed into a pre-purification regenerated gas heater from methanol synthesis equipment, medium-pressure steam is conveyed into the pre-purification regenerated gas heater from a medium-pressure steam boiler, heat of the medium-pressure steam can be transferred into the regenerated gas, so that the temperature of the regenerated gas is increased, the heated regenerated gas is conveyed into an adsorption tower to react with an adsorbent, and the regenerated gas is purified. Benzene is completely separated from the adsorbent, the cleanliness of the adsorbent is improved, and the number of times of recycling of the adsorbent is increased. The temperature of the regeneration gas is detected through the temperature sensor, then a signal is transmitted to the controller, and the controller controls the opening degree of the pneumatic valve so as to adjust the conveying flow of the medium-pressure steam and further adjust the temperature of the regeneration gas, so that the debenzolization effect of the regeneration gas on the adsorbent is ensured when the regeneration gas is mixed with the adsorbent.

Description

Technical Field

[0001] The utility model relates to the technical field of benzene removal, in particular to a pre-purification benzene removal regeneration system. Background Art

[0002] In the production process of methanol, the gas generated by coking equipment is adsorbed by the adsorbent in the benzene removal tower to remove benzene in the gas, facilitating the subsequent processing of the gas. After the adsorbent is subjected to multiple adsorption treatments, the benzene content inside the adsorbent is relatively high, resulting in poor adsorption effect of the adsorbent, making the gas output not meet the standard. Therefore, the adsorbent needs to be replaced regularly, increasing the production cost.

[0003] Currently, the methanol plant heats up the waste gas generated during the operation of the methanol synthesis equipment as the regeneration gas to perform benzene removal treatment on the adsorbent in the benzene removal tower, so that the benzene in the adsorbent is separated. The adsorbent that has completed the benzene removal treatment can be recycled, thereby increasing the recycling times of the adsorbent. However, it is found in the actual production process that in order to make the regeneration gas have a certain temperature, in the prior art, low-pressure steam is usually used for heat exchange treatment with the regeneration gas, so that the temperature of the regeneration gas rises. However, due to the low temperature of the low-pressure steam and the inability to control the temperature of the regeneration gas after heat exchange, it may not be able to reach the temperature requirement for complete separation of benzene from the adsorbent, so that there is still some benzene mixed in the adsorbent. Even if the adsorbent can be recycled, due to the increasing benzene content in the adsorbent, the number of times the adsorbent can be recycled is still small. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a pre-purification benzene removal regeneration system. The technical solution of the utility model is as follows:

[0005] The utility model provides a pre-purification benzene removal regeneration system, including a pneumatic valve, a temperature sensor, a pre-purification regeneration gas heater, multiple benzene removal towers, multiple connecting pipes and a controller. The first outlet of the methanol synthesis equipment is connected to the first inlet of the pre-purification regeneration gas heater through a connecting pipe. The second outlet of the methanol synthesis equipment is connected to the inlet of the medium-pressure steam boiler through a connecting pipe. The outlet of the medium-pressure steam boiler is connected to the second inlet of the pre-purification regeneration gas heater through a connecting pipe. The outlet of the coking equipment is connected to the first inlets of the multiple benzene removal towers through a connecting pipe. The first outlet of the pre-purification regeneration gas heater is connected to the second inlets of the multiple benzene removal towers through a connecting pipe. The first outlets of the multiple benzene removal towers are all connected to the inlet of the coking equipment through a connecting pipe. The second outlets of the multiple benzene removal towers are all connected to the first inlet of the methanol synthesis equipment through a connecting pipe. The second outlet of the pre-purification regeneration gas heater is connected to the second inlet of the methanol synthesis equipment through a connecting pipe;

[0006] The pneumatic valve is connected to the connecting pipe between the medium-pressure steam boiler and the pre-purification and regeneration gas heater, and the temperature sensor is connected to the connecting pipe between multiple debenzolization towers and the pre-purification and regeneration gas heater; both the pneumatic valve and the temperature sensor are electrically connected to the controller.

[0007] Optionally, the pre-purification and regeneration gas heater includes a first pipe, multiple second pipes and an expansion joint. The multiple second pipes are inserted parallelly inside the first pipe, and the expansion joint is sleeved on the outer wall of the first pipe;

[0008] The outlet of the medium-pressure steam boiler is connected to the inlet of the first pipe, the first outlet of the methanol synthesis equipment is connected to the inlets of the multiple second pipes, the outlet of the first pipe is connected to the second inlet of the methanol synthesis equipment, and the outlets of the multiple second pipes are connected to the second inlets of the multiple debenzolization towers.

[0009] Optionally, a pre-purification and debenzolization regeneration system further includes a filter, and the filter is connected to the connecting pipe between the first outlet of the methanol synthesis equipment and the first inlet of the pre-purification and regeneration gas heater.

[0010] Optionally, a pre-purification and debenzolization regeneration system further includes a flow control valve, and the flow control valve is connected to the connecting pipe between the first outlet of the methanol synthesis equipment and the first inlet of the pre-purification and regeneration gas heater; the flow control valve is electrically connected to the controller.

[0011] Optionally, a pre-purification and debenzolization regeneration system further includes two groups of valve assemblies. The first group of valve assemblies is connected to the connecting pipe between the medium-pressure steam boiler and the pre-purification and regeneration gas heater, and the second group of valve assemblies is connected to the connecting pipe between the second inlet of the methanol synthesis equipment and the second outlet of the pre-purification and regeneration gas heater;

[0012] Each group of valve assemblies includes two electric gate valves and a stop valve. One end of the first electric gate valve is connected to one end of the second electric gate valve, one end of the stop valve is connected to the other end of the first electric gate valve, and the other end of the stop valve is connected to the other end of the second electric gate valve;

[0013] The other end of the first electric gate valve in the first group of valve assemblies is connected to the second inlet of the pre-purification and regeneration gas heater, and the other end of the second electric gate valve is connected to the outlet of the medium-pressure steam boiler;

[0014] The other end of the first electric gate valve in the second group of the valve assemblies is connected to the second outlet of the pre-purification regeneration gas heater, and the other end of the second electric gate valve is connected to the second inlet of the methanol synthesis equipment;

[0015] The globe valve and the two electric gate valves are all electrically connected to the controller.

[0016] Optionally, both ends of the pneumatic valve are connected between two electric gate valves in the first group of the valve assemblies.

[0017] Optionally, a pre-purification benzene removal regeneration system further includes an automatic exhaust valve, and the automatic exhaust valve is connected to a connecting pipe between the first outlets of the plurality of benzene removal towers and the inlet of the coking equipment; the automatic exhaust valve is electrically connected to the controller.

[0018] All the above optional technical solutions can be combined arbitrarily, and the present utility model does not elaborate on the structures after the combinations one by one.

[0019] By means of the above solutions, the beneficial effects of the present utility model are as follows:

[0020] By providing a pre-purification regeneration gas heater, a plurality of benzene removal towers, a methanol synthesis equipment and a medium-pressure steam boiler, the first outlet of the methanol synthesis equipment is connected to the first inlet of the pre-purification regeneration gas heater, so that the regeneration gas generated by the methanol synthesis equipment is transported to the pre-purification regeneration gas heater, and the outlet of the medium-pressure steam boiler is connected to the second inlet of the pre-purification regeneration gas heater, so that the medium-pressure steam is transported to the pre-purification regeneration gas heater. After the regeneration gas and the medium-pressure steam are both inside the pre-purification regeneration gas heater, the medium-pressure steam exchanges heat with the regeneration gas, and the heat of the medium-pressure steam is transferred to the regeneration gas. Compared with low-pressure steam, the medium-pressure steam can provide higher heat for the regeneration gas, making the temperature of the regeneration gas higher. At this time, the heated regeneration gas is transported to the plurality of benzene removal towers to react with the adsorbent, which can completely remove benzene from the adsorbent, improve the cleanliness of the adsorbent, and further increase the number of times the adsorbent can be recycled.

[0021] By setting a pneumatic valve, a temperature sensor and a controller, both the pneumatic valve and the temperature sensor are electrically connected to the controller. If the temperature sensor detects that the output temperature of the regenerated gas is relatively low, a signal can be transmitted to the controller, and the controller controls the operation of the pneumatic valve to increase the opening degree, so as to increase the conveying flow rate of the medium-pressure steam, and then increase the output temperature of the regenerated gas; if the temperature sensor detects that the output temperature of the regenerated gas is relatively high, a signal can be transmitted to the controller, and the controller controls the operation of the pneumatic valve to reduce the opening degree, so as to reduce the conveying flow rate of the medium-pressure steam, and then reduce the output temperature of the regenerated gas, so as to realize the control of the output temperature of the regenerated gas in the pre-purification regenerated gas heater, thereby ensuring that when the regenerated gas is mixed with the adsorbent, the benzene removal effect of the regenerated gas on the adsorbent can be improved.

[0022] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it in accordance with the content of the description, the following takes the preferred embodiments of the present invention and combines the accompanying drawings to describe in detail as follows. Brief Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the system composition of the present invention;

[0024] Figure 2 It is the front view of the pre-purification regenerated gas heater of the present invention;

[0025] Figure 3 It is the internal structure schematic diagram of the pre-purification regenerated gas heater of the present invention.

[0026] Explanation of the reference numerals in the drawings:

[0027] 1. Pneumatic valve; 2. Temperature sensor; 3. Pre-purification regenerated gas heater; 31. First pipeline; 32. Second pipeline; 33. Expansion joint; 4. Benzene removal tower; 5. Coking equipment; 6. Methanol synthesis equipment; 7. Medium-pressure steam boiler; 8. Filter; 9. Flow control valve; 10. Valve assembly; 101. Electric gate valve; 102. Globe valve; 11. Automatic exhaust valve. Detailed Description of the Embodiments

[0028] The following combines the accompanying drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0029] As Figure 1As shown in the figure, a pre-purification and debenzolization regeneration system provided by the utility model includes a pneumatic valve 1, a temperature sensor 2, a pre-purification and regeneration gas heater 3, multiple debenzolization towers 4, multiple connecting pipes and a controller. The first outlet of the methanol synthesis device 6 is connected to the first inlet of the pre-purification and regeneration gas heater 3 through a connecting pipe. The second outlet of the methanol synthesis device 6 is connected to the inlet of the medium-pressure steam boiler 7 through a connecting pipe. The outlet of the medium-pressure steam boiler 7 is connected to the second inlet of the pre-purification and regeneration gas heater 3 through a connecting pipe. The outlet of the coking device 5 is connected to the first inlets of multiple debenzolization towers 4 through a connecting pipe. The first outlet of the pre-purification and regeneration gas heater 3 is connected to the second inlets of multiple debenzolization towers 4 through a connecting pipe. The first outlets of multiple debenzolization towers 4 are connected to the inlet of the coking device 5 through a connecting pipe. The second outlets of multiple debenzolization towers 4 are connected to the first inlet of the methanol synthesis device 6 through a connecting pipe. The second outlet of the pre-purification and regeneration gas heater 3 is connected to the second inlet of the methanol synthesis device 6 through a connecting pipe;

[0030] The pneumatic valve 1 is connected to the connecting pipe between the medium-pressure steam boiler 7 and the pre-purification and regeneration gas heater 3. The temperature sensor 2 is connected to the connecting pipe between multiple debenzolization towers 4 and the pre-purification and regeneration gas heater 3;

[0031] Both the pneumatic valve 1 and the temperature sensor 2 are electrically connected to the controller.

[0032] Specifically, the medium-pressure steam boiler 7 in the utility model is the boiler of the power plant in the methanol plant. The regeneration gas in the utility model is the worthless gas generated during the production process of the methanol synthesis device 6. The number of debenzolization towers 4 is not limited. The debenzolization towers 4 in the utility model are three or four. The temperature of the regeneration gas in the utility model is 150°C - 170°C, and the temperature of the medium-pressure steam is 180°C - 350°C.

[0033] In the specific implementation manner, during the transportation of the regeneration gas, the temperature sensor 2 can detect the temperature of the regeneration gas in real time and transmit the signal to the controller. The controller analyzes whether the output temperature of the current regeneration gas reaches the temperature requirement. When the controller analyzes that the current regeneration gas temperature is higher than 170°C, it controls the pneumatic valve 1 to reduce the opening degree to reduce the output flow of the medium-pressure steam, thereby reducing the subsequent temperature of the regeneration gas. When the controller analyzes that the current regeneration gas temperature is lower than 150°C, it controls the pneumatic valve 1 to increase the opening degree to increase the output flow of the medium-pressure steam, thereby increasing the subsequent temperature of the regeneration gas.

[0034] By connecting the first outlet of the methanol synthesis device 6 to the first inlet of the pre-purification regenerated gas heater 3, the regenerated gas generated by the methanol synthesis device 6 is conveyed into the pre-purification regenerated gas heater 3. The outlet of the medium-pressure steam boiler 7 is connected to the second inlet of the pre-purification regenerated gas heater 3, so that the medium-pressure steam is conveyed into the pre-purification regenerated gas heater 3. After the regenerated gas and the medium-pressure steam are both inside the pre-purification regenerated gas heater 3, the medium-pressure steam exchanges heat with the regenerated gas, enabling the heat of the medium-pressure steam to be transferred to the regenerated gas. Compared with low-pressure steam, the medium-pressure steam can provide higher heat for the regenerated gas, making the temperature of the regenerated gas higher. At this time, the heated regenerated gas is conveyed to multiple debenzolization towers 4 to mix and react with the adsorbent, which can completely remove benzene from the adsorbent, improve the cleanliness of the adsorbent, and further increase the number of times the adsorbent can be recycled.

[0035] By electrically connecting both the pneumatic valve 1 and the temperature sensor 2 to the controller, the temperature sensor 2 can detect the temperature of the regenerated gas in real time and transmit the signal to the controller. The controller controls the operation of the pneumatic valve 1 to increase or decrease the opening degree, so as to increase or decrease the conveying flow rate of the medium-pressure steam, thereby increasing or decreasing the temperature of the regenerated gas, and realizing the control of the temperature of the regenerated gas output from the pre-purification regenerated gas heater 3, so as to ensure that when the regenerated gas is mixed with the adsorbent, the benzene removal effect of the regenerated gas on the adsorbent can be improved.

[0036] Optionally, as Figure 2 and Figure 3 shown, the pre-purification regenerated gas heater 3 includes a first pipe 31, a plurality of second pipes 32 and an expansion joint 33. The plurality of second pipes 32 are inserted parallelly inside the first pipe 31, and the expansion joint 33 is sleeved on the outer wall of the first pipe 31;

[0037] The outlet of the medium-pressure steam boiler 7 is connected to the inlet of the first pipe 31, the first outlet of the methanol synthesis device 6 is connected to the inlets of the plurality of second pipes 32, the outlet of the first pipe 31 is connected to the second inlet of the methanol synthesis device 6, and the outlets of the plurality of second pipes 32 are connected to the second inlets of the plurality of debenzolization towers 4.

[0038] Specifically, the materials of the first pipe 31 and the second pipe 32 in the present utility model are both low-carbon alloy steel.

[0039] In a specific embodiment, the medium-pressure steam boiler 7 delivers medium-pressure steam into the first pipeline 31, and the methanol synthesis device 6 delivers the regeneration gas into multiple second pipelines 32. The medium-pressure steam can transfer heat to the regeneration gas, increasing the temperature of the regeneration gas. The medium-pressure steam that loses heat is liquefied into a liquid and delivered to the condenser of the methanol synthesis device 6, and then delivered to the medium-pressure steam boiler 7 through the condenser, so as to be processed into medium-pressure steam again by the medium-pressure steam boiler 7 for recycling.

[0040] Compared with low-pressure steam, medium-pressure steam has a higher temperature and is more likely to increase the temperature of the regeneration gas.

[0041] By sleeving an expansion joint 33 on the outer wall of the first pipeline 31, the utility model can effectively prevent the first pipeline 31 and the second pipeline 32 from expanding due to the increase in internal temperature, and thus avoid the situation of cracking.

[0042] Optionally, a pre-purification debenzene regeneration system further includes a filter 8, and the filter 8 is connected to a connecting pipeline between the first outlet of the methanol synthesis device 6 and the first inlet of the pre-purification regeneration gas heater 3.

[0043] When the methanol synthesis device 6 delivers the regeneration gas into the pre-purification regeneration gas heater 3, impurities may be carried in the regeneration gas. The filter 8 can filter the regeneration gas to avoid the impurities carried in the regeneration gas from clogging the second pipeline 32 in the pre-purification regeneration gas heater 3, ensuring the gas volume of the regeneration gas output by the multiple second pipelines 32, and thus ensuring the debenzene effect of the regeneration gas on the adsorbent.

[0044] Optionally, a pre-purification debenzene regeneration system further includes a flow control valve 9, and the flow control valve 9 is connected to a connecting pipeline between the first outlet of the methanol synthesis device 6 and the first inlet of the pre-purification regeneration gas heater 3; the flow control valve 9 is electrically connected to the controller.

[0045] According to different actual production situations, the gas volume of the regeneration gas delivered by the methanol synthesis device 6 into the pre-purification regeneration gas heater 3 can be controlled by the flow control valve 9, avoiding the waste of the regeneration gas or the situation that the gas volume of the regeneration gas is too small and the debenzene effect is poor.

[0046] Optionally, a pre-purification debenzene regeneration system further includes two groups of valve assemblies 10. The first group of valve assemblies 10 is connected to a connecting pipeline between the medium-pressure steam boiler 7 and the pre-purification regeneration gas heater 3, and the second group of valve assemblies 10 is connected to a connecting pipeline between the second inlet of the methanol synthesis device 6 and the second outlet of the pre-purification regeneration gas heater 3;

[0047] Each set of the valve assemblies 10 includes two electric gate valves 101 and a globe valve 102. One end of the first electric gate valve 101 is connected to one end of the second electric gate valve 101. One end of the globe valve 102 is connected to the other end of the first electric gate valve 101, and the other end of the globe valve 102 is connected to the other end of the second electric gate valve 101.

[0048] The other end of the first electric gate valve 101 in the first set of the valve assemblies 10 is connected to the second inlet of the pre-purification regenerated gas heater 3, and the other end of the second electric gate valve 101 is connected to the outlet of the medium-pressure steam boiler 7.

[0049] The other end of the first electric gate valve 101 in the second set of the valve assemblies 10 is connected to the second outlet of the pre-purification regenerated gas heater 3, and the other end of the second electric gate valve 101 is connected to the second inlet of the methanol synthesis device 6.

[0050] The globe valve 102 and the two electric gate valves 101 are all electrically connected to the controller.

[0051] The connecting pipelines where the two electric gate valves 101 are located can be the main passage, and the connecting pipeline where the globe valve 102 is located can be the auxiliary passage. During normal use, the two electric gate valves 101 are in the open state, and the globe valve 102 is in the closed state. When the connecting pipelines where the two electric gate valves 101 are located need to be repaired, the two electric gate valves 101 can be closed, and the globe valve 102 can be opened, so that the medium-pressure steam is transported to the pre-purification regenerated gas heater 3 through the globe valve 102, avoiding affecting the heat exchange process of the regenerated gas.

[0052] When the amount of medium-pressure steam introduced into the main passage cannot meet the requirements, the controller can open the globe valve 102, and the medium-pressure steam is introduced through the main passage and the auxiliary passage simultaneously to increase the amount of medium-pressure steam.

[0053] Since the globe valve 102 has good sealing performance, during normal use, in order to ensure the normal use of the main passage, it is necessary to ensure that the auxiliary passage is in a completely cut-off state. Therefore, the globe valve 102 is usually used as the auxiliary valve of the auxiliary passage.

[0054] Optionally, both ends of the pneumatic valve 1 are connected between the two electric gate valves 101 in the first set of the valve assemblies 10. By connecting the pneumatic valve 1 between the two electric gate valves 101, it is convenient to repair the pneumatic valve 1.

[0055] Optionally, a pre-purification and debenzolization regeneration system further includes an automatic exhaust valve 11. The automatic exhaust valve 11 is connected to the connecting pipeline between the first outlets of multiple debenzolization towers 4 and the inlet of the coking equipment 5. The automatic exhaust valve 11 is electrically connected to the controller.

[0056] By controlling the automatic exhaust valve 11, the controller can achieve the automatic discharge of waste gas, avoiding the long-term storage of waste gas in the benzene stripper 4 and preventing pollution to other gases that need to react.

[0057] The working principle of the present utility model includes: The medium-pressure steam boiler 7 processes medium-pressure steam and transports the medium-pressure steam through a connecting pipeline to the first pipeline 31 in the pre-purification regeneration gas heater 3. The methanol synthesis equipment 6 transports the worthless coal gas generated through a connecting pipeline to multiple second pipelines 32 in the pre-purification regeneration gas heater 3. In the pre-purification regeneration gas heater 3, the medium-pressure steam transfers heat to the regeneration gas, increasing the temperature of the regeneration gas. The liquefied liquid of the medium-pressure steam is transported through a connecting pipeline to the condenser of the methanol synthesis equipment 6. The condenser of the methanol synthesis equipment 6 transports the liquefied liquid of the medium-pressure steam to the medium-pressure steam boiler 7 to be processed into medium-pressure steam again for the next regeneration gas heat exchange process.

[0058] The regeneration gas with increased temperature is transported through a connecting pipeline to multiple benzene strippers 4 to react with the adsorbent in the benzene stripper 4, so as to completely react and separate the benzene in the adsorbent, thereby realizing the benzene removal treatment of the regeneration gas and the adsorbent.

[0059] The separated benzene and the remaining regeneration gas that has not undergone the benzene removal reaction are transported through a connecting pipeline to the coke oven of the coking equipment 5 for treatment, which not only avoids environmental pollution but also produces coke.

[0060] In summary, for the pre-purification benzene removal and regeneration system provided by the present utility model, by replacing the low-pressure steam with medium-pressure steam, the temperature of the regeneration gas is higher, and the higher-temperature regeneration gas can react with the adsorbent for benzene removal, so as to completely react and separate the benzene in the adsorbent; by setting the pneumatic valve 1 and the temperature sensor 2, the temperature of the regeneration gas can be regulated, avoiding the regeneration gas temperature being too high or too low, and improving the benzene removal effect on the adsorbent; by setting two electric gate valves 101 and globe valves 102, the impact on production efficiency can be avoided, and the flow rate of the gas transported in the connecting pipeline can also be adjusted.

[0061] The above is only the preferred embodiment of the present utility model and is not used to limit the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A pre-purification debenzene regeneration system, characterized in that: include: A pneumatic valve (1), a temperature sensor (2), a pre-purified regeneration gas heater (3), a plurality of debenzene towers (4), a plurality of connecting pipes and a controller, wherein the first outlet of the methanol synthesis device (6) is connected to the first inlet of the pre-purified regeneration gas heater (3) through a connecting pipe, the second outlet of the methanol synthesis device (6) is connected to the inlet of a medium-pressure steam boiler (7) through a connecting pipe, the outlet of the medium-pressure steam boiler (7) is connected to the second inlet of the pre-purified regeneration gas heater (3) through a connecting pipe, the outlet of the coking device (5) is connected to the first inlets of the plurality of debenzene towers (4) through a connecting pipe, the first outlet of the pre-purified regeneration gas heater (3) is connected to the second inlet of the plurality of debenzene towers (4) through a connecting pipe, the first outlet of the plurality of debenzene towers (4) is connected to the inlet of the coking device (5) through a connecting pipe, the second outlet of the plurality of debenzene towers (4) is connected to the first inlet of the methanol synthesis device (6) through a connecting pipe, and the second outlet of the pre-purified regeneration gas heater (3) is connected to the second inlet of the methanol synthesis device (6) through a connecting pipe; The pneumatic valve (1) is connected to the connecting pipe between the medium-pressure steam boiler (7) and the pre-purification regeneration gas heater (3), and the temperature sensor (2) is connected to the connecting pipe between the plurality of debenzene towers (4) and the pre-purification regeneration gas heater (3); The pneumatic valve (1) and the temperature sensor (2) are both electrically connected to the controller.

2. A pre-purification debenzene regeneration system according to claim 1, characterized in that: The pre-purified regeneration gas heater (3) comprises: a first pipe (31), a plurality of second pipes (32) and an expansion joint (33), wherein the plurality of second pipes (32) are inserted in parallel inside the first pipe (31), and the expansion joint (33) is sleeved on the outer wall of the first pipe (31); The outlet of the medium-pressure steam boiler (7) is connected to the inlet of the first pipeline (31), the first outlet of the methanol synthesis equipment (6) is connected to the inlets of multiple second pipelines (32), the outlet of the first pipeline (31) is connected to the second inlet of the methanol synthesis equipment (6), and the outlets of multiple second pipelines (32) are connected to the second inlets of multiple debenzene towers (4).

3. A pre-purification debenzene regeneration system according to claim 1 or 2, characterized in that: Also includes: A filter (8), wherein the filter (8) is connected to a connecting pipe between a first outlet of the methanol synthesis device (6) and a first inlet of the pre-purified regeneration gas heater (3).

4. A pre-purification debenzene regeneration system according to claim 1, characterized in that: Also includes: a flow control valve (9), the flow control valve (9) being connected to a connecting pipe between a first outlet of the methanol synthesis device (6) and a first inlet of the pre-purified regeneration gas heater (3); The flow control valve (9) is electrically connected to the controller.

5. A pre-purification debenzene regeneration system according to claim 1, characterized in that: Also includes: Two groups of valve assemblies (10), the first group of valve assemblies (10) being connected to the connecting pipe between the medium-pressure steam boiler (7) and the pre-purified regeneration gas heater (3), and the second group of valve assemblies (10) being connected to the connecting pipe between the second inlet of the methanol synthesis device (6) and the second outlet of the pre-purified regeneration gas heater (3); Each group of the valve components (10) comprises two electric gate valves (101) and a stop valve (102), one end of the first electric gate valve (101) is connected to one end of the second electric gate valve (101), one end of the stop valve (102) is connected to the other end of the first electric gate valve (101), and the other end of the stop valve (102) is connected to the other end of the second electric gate valve (101); The other end of the first electric gate valve (101) in the first group of valve assemblies (10) is connected to the second inlet of the pre-cleaned regeneration gas heater (3), and the other end of the second electric gate valve (101) is connected to the outlet of the medium-pressure steam boiler (7); The other end of the first electric gate valve (101) in the second group of valve components (10) is connected to the second outlet of the pre-purified regeneration gas heater (3), and the other end of the second electric gate valve (101) is connected to the second inlet of the methanol synthesis device (6); The stop valve (102) and the two electric gate valves (101) are all electrically connected to the controller.

6. A pre-purification debenzene regeneration system according to claim 5, characterized in that: The two ends of the pneumatic valve (1) are connected between two electric gate valves (101) in the first group of valve components (10).

7. A pre-purification debenzene regeneration system according to claim 1, characterized in that: Also includes: An automatic exhaust valve (11), the automatic exhaust valve (11) being connected to a connecting pipe between a first outlet of a plurality of the debenzene towers (4) and an inlet of the coking equipment (5); The automatic exhaust valve (11) is electrically connected to the controller.

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