Clean production equipment for amine liquid desulfurization system

Abstract

The utility model discloses clean production equipment of an amine liquid desulfurization system, which comprises a desulfurization tower for countercurrent absorption of sulfur-containing gas and lean amine liquid, and a rich amine liquid pre-dealkylation device, a rich amine liquid flash evaporator, an amine liquid regeneration tower and an amine liquid purifier which are sequentially connected in series at the rear end of a rich amine liquid outlet of the desulfurization tower, the liquefied gas pre-liquid and solid removal device, the liquefied gas deep liquid removal device and the liquefied gas water scrubber are sequentially connected in series at the rear end of a liquid hydrocarbon outlet of the desulfurization tower; wherein the lean amine liquid outlet of the amine liquid purifier is further connected to the desulfurization tower through a pipeline, so that the regenerated lean amine liquid is reused for desulfurization of the sulfur-containing gas. The equipment disclosed by the utility model can efficiently remove hydrocarbon and amine, and has the advantages of reducing energy consumption and improving system stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of refinery gas alcohol amine desulfurization purification, in particular to a clean production equipment for an amine liquid desulfurization system. Background Art

[0002] With the increasingly stringent environmental protection and the accelerated process of upgrading oil quality, the absorption and treatment of soluble substances such as hydrogen sulfide, mercaptans and sulfides in oil and gas has become particularly important. At present, the industry generally uses the alcohol amine method to treat these harmful substances. Its basic principle is to achieve effective removal of sulfides through chemical reaction between alcohol amine and sulfides such as H2S.

[0003] In the process of liquefied gas desulfurization, the traditional amine method involves several key steps. Figure 1 As shown, the liquefied gas enters the liquefied gas feed tank of the gas desulfurization device from the upstream device, and is then transported to the lower part of the liquefied gas desulfurization tower 10 by the feed pump. At the same time, the desulfurization lean liquid pump pressurizes the lean amine liquid, and after being cooled to a suitable temperature by the cooler, it enters the upper part of the desulfurization tower 10. In the tower, the lean amine liquid contacts the liquefied gas in countercurrent, and the amine liquid absorbs H2S in the liquefied gas to form rich amine liquid and flows out from the bottom of the tower to the amine liquid regeneration tower 20. The desulfurized liquefied gas enters the amine separation tank, and after agglomeration and sedimentation, it is sent to the subsequent treatment device.

[0004] However, in actual operation, rich amine liquid usually carries light hydrocarbons and liquid light hydrocarbons in the form of tiny bubbles, which not only causes pressure and liquid level fluctuations in the flash tower and regeneration tower, but also increases the emission of flare gas, thereby increasing the risk of excessive tail gas from the downstream sulfur unit, and also increases the energy consumption of the rich liquid regeneration process. At present, the removal of light hydrocarbons from rich amine liquid mainly relies on sedimentation buffer tanks, but this method has low efficiency in removing tiny bubbles and emulsified oil droplets. In addition, excessive pressure reduction will lead to the separation of a large amount of light hydrocarbons and acid gas, and increase the entrainment of solvent, thereby exacerbating solvent loss.

[0005] On the other hand, during the recycling of amine liquid, solid impurities generated due to corrosion and shedding of pipelines and equipment, degradation of amine liquid, etc. will aggravate the corrosion of the system, thus affecting the safe and stable operation of amine liquid desulfurization and amine liquid regeneration system. More seriously, due to factors such as liquid level control, operation fluctuations, and load changes, the liquefied gas at the top of the desulfurization tower may carry amine liquid, which will cause alkaline liquid foaming pollution to the subsequent desulfurization system. Utility Model Content

[0006] In view of the above problems, it is urgent to develop a high-efficiency and low-consumption equipment to achieve the dehydrogenation of rich amine liquid and the deamine of liquefied gas, reduce the process fluctuations of rich amine liquid, suppress the risk of environmental damage, and improve the economy and clean operation level of the device.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A clean production equipment for an amine liquid desulfurization system comprises a desulfurization tower for countercurrent absorption of sulfur-containing gas and lean amine liquid, a rich amine liquid pre-dehydrocarbonator, a rich amine liquid flash evaporator, an amine liquid regeneration tower, and an amine liquid purifier which are sequentially connected in series at the rear end of the rich amine liquid outlet of the desulfurization tower, and a liquefied gas pre-dehydration and desolidification device, a liquefied gas deep dehydrator, and a liquefied gas scrubber which are sequentially connected in series at the rear end of the liquid hydrocarbon outlet of the desulfurization tower; wherein the lean amine liquid outlet of the amine liquid purifier is also connected to the desulfurization tower through a pipeline, so that the regenerated lean amine liquid can be reused for desulfurization of sulfur-containing gas.

[0009] According to the utility model, a rich amine liquid inlet is provided on one side of the rich amine liquid pre-dehydrogenator, a gas phase outlet and a liquid phase outlet are provided on the top and the bottom respectively, and a coalescence rapid separation module is installed inside.

[0010] According to the utility model, a rich amine liquid inlet is provided on one side of the rich amine liquid flash evaporator, a rich amine liquid outlet is provided on the bottom of the other side, a liquid hydrocarbon gas phase outlet and an acid gas gas phase outlet are provided on the top, a fiber coalescence and deliquescence module is also provided at the acid gas phase outlet, and a centrifugal flash module, a fiber coalescence and separation module, a U-shaped oil collecting tank, and a baffle are provided in sequence inside the rich amine liquid flash evaporator from the inlet side to the outlet side.

[0011] According to the utility model, the top and bottom of the amine liquid regeneration tower are respectively provided with an acid gas outlet and a lean amine liquid outlet, and the bottom is provided with a tower bottom reboiler.

[0012] According to the utility model, a lean amine liquid inlet and a steam inlet are respectively provided at upper and lower positions on one side of the amine liquid purifier, an acid gas outlet is provided at the top, a lean amine liquid outlet is provided at the bottom, and a filter module is provided inside the amine liquid purifier.

[0013] Preferably, there are two amine liquid purifiers, which adopt a "one on, one on standby" mode.

[0014] According to the utility model, a liquefied gas inlet is provided on one side of the liquefied gas pre-dehydration and desolidification device, a liquefied gas outlet and an amine liquid outlet are provided on the top and bottom respectively, and a centrifugal separation module is installed inside the liquefied gas pre-dehydration and desolidification device.

[0015] According to the utility model, a liquefied gas inlet is provided on one side of the liquefied gas deep deliquidator, and a liquefied gas outlet and an amine liquid outlet are respectively provided on the top and bottom of the other side; a multi-interface mixed fiber module and a quick separation module are sequentially installed inside the liquefied gas deep deliquidator from the inlet to the outlet.

[0016] According to the utility model, the top of the rich amine liquid pre-dealkylator is also connected to the liquefied gas pre-deliquidation and desolidification device through a pipeline, so as to merge the liquid hydrocarbons separated from the rich amine liquid with the liquefied gas flowing out of the top of the desulfurization tower and then enter the liquefied gas pre-deliquidation and desolidification device.

[0017] According to the utility model, the amine liquid outlets at the bottom of the liquefied gas pre-deliquidation and desolidification device and the liquefied gas deep deliquidation device are also connected to the rich amine liquid inlet pipeline of the rich amine liquid flash evaporator through pipelines, so that the separated amine liquid is mixed with the amine liquid coming out of the rich amine liquid pre-dehydrocarbonator and then enters the rich amine liquid flash evaporator.

[0018] The utility model has the following beneficial effects:

[0019] 1. Efficient dehydrocarbon and deamine: Through the optimized design of dehydrocarbon and deamine equipment, this system can efficiently remove tiny bubbles and emulsified oil droplets in the rich amine liquid, effectively reducing the pressure and liquid level fluctuations of the flash tower and regeneration tower, thereby reducing the flare gas emissions and the risk of excessive tail gas in downstream devices. At the same time, the amine liquid in the liquefied gas can also be efficiently removed, avoiding the problem of alkali liquid foaming pollution.

[0020] 2. Reduced energy consumption: This system reduces energy consumption during the regeneration of rich amine liquid by improving the efficiency of hydrocarbon and amine removal. In addition, the optimized design of the equipment reduces the amount of solvent entrainment, further reducing solvent loss, thereby improving the economic efficiency of the device.

[0021] 3. Improved system stability: This system reduces the risk of equipment corrosion by reducing the fluctuation of the rich amine process, and improves the safe and stable operation level of the amine desulfurization and amine regeneration system. In addition, this system can effectively suppress the risk of environmental damage and improve the clean operation level of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the process flow chart of the traditional amine liquid desulfurization system.

[0023] Figure 2 This is a process flow chart of the clean production of amine liquid desulfurization according to the utility model.

[0024] Figure 3 This is a schematic diagram of the structure of the rich amine liquid pre-dehydrogenator.

[0025] Figure 4 This is a schematic diagram of the structure of the rich amine liquid flash evaporator.

[0026] Figure 5 This is a schematic diagram of the structure of the amine liquid purifier.

[0027] Figure 6 This is a schematic diagram of the structure of the liquefied gas pre-deliquidation and desolidification device.

[0028] Figure 7 This is a schematic diagram of the structure of a liquefied gas deep deliquifier. DETAILED DESCRIPTION

[0029] The technical solution of the utility model is clearly and completely described below with specific embodiments in conjunction with the accompanying drawings. It should be understood that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the utility model.

[0030] The various equipment used in the following embodiments, such as the desulfurization tower, pre-dehydrogenation device, flash evaporator, etc., can be selected from the same type of equipment known in the prior art according to their respective functions unless otherwise specified. The innovation of the present utility model is not in these equipments themselves, but in the overall process system composed of these equipments.

[0031] like Figure 2 As shown, the clean production equipment of the amine liquid desulfurization system of the utility model includes a desulfurization tower 100 for countercurrent absorption of sulfur-containing gas and lean amine liquid, a rich amine liquid pre-dehydrogenator 200, a rich amine liquid flash evaporator 300, an amine liquid regeneration tower 400, and an amine liquid purifier 500 which are connected in series in sequence at the rear end of the rich amine liquid outlet 103 of the desulfurization tower 100, and a liquefied gas pre-deliquidation and desolidification device 600, a liquefied gas deep deliquidator 700, and a liquefied gas water scrubber 800 which are connected in series in sequence at the rear end of the liquid hydrocarbon outlet 104 of the desulfurization tower 100; wherein: the lean amine liquid outlet of the amine liquid purifier 500 is also connected to the desulfurization tower 100 through a pipeline, so that the regenerated lean amine liquid can be reused for the desulfurization of sulfur-containing gas.

[0032] Furthermore, the upper and lower parts of the desulfurization tower 100 are respectively provided with a lean amine liquid inlet 101 and a sulfur-containing liquefied gas inlet 102 for the lean amine liquid and the sulfur-containing liquefied gas to enter the desulfurization tower 100 , thereby completing the countercurrent absorption process in the desulfurization tower 100 .

[0033] The rich amine liquid pre-dehydrogenator 200 is used to remove liquid hydrocarbons from the rich amine liquid that has absorbed H2S in a non-depressurized state; the rich amine liquid pre-dehydrogenator 200 adopts a vertical or horizontal container, such as Figure 3 As shown, it is preferably a vertical container, with a rich amine liquid inlet 201 provided on one side of the container, a gas phase outlet 203 and a liquid phase outlet 202 provided on the top and bottom respectively, and a coalescence rapid separation module 204 installed inside the container, which can remove the liquid hydrocarbons entrained in the rich amine liquid to less than 50 mg / L.

[0034] The rich amine liquid flash evaporator 300 is used to separate hydrocarbon gases and part of acid gases carried and dissolved in the rich amine liquid; the rich amine liquid flash evaporator 300 adopts a vertical or horizontal container, such as Figure 4As shown, it is preferably a horizontal container, one side of the container is provided with a rich amine liquid inlet 301, the bottom of the other side is provided with a rich amine liquid outlet 304, the top is provided with a liquid hydrocarbon gas phase outlet 302 and an acid gas phase outlet 303, the acid gas phase outlet 303 is also provided with a fiber coalescence and deliquescence module 309, the inside of the container is provided with a centrifugal flash module 305, a fiber coalescence and separation module 306, a U-shaped oil collecting tank 307, a baffle 308 in sequence from the inlet side to the outlet side, the liquid hydrocarbon gas phase outlet 302 is arranged at the Above the U-shaped oil collecting tank 307, the centrifugal flash module 305 can remove dissolved light hydrocarbons in the rich amine liquid at a pressure less than 0.01 MPa, the fiber agglomeration separation module 306 is used to agglomerate small droplets of liquid hydrocarbons remaining in the rich amine liquid, the U-shaped oil collecting tank 307 is used to collect liquid hydrocarbons floating on the surface of the rich amine liquid after agglomeration, and the baffle 308 is used to control the liquid level of the rich amine liquid to be not lower than the bottom of the U-shaped oil collecting tank 307; after the rich amine liquid is treated, the content of dissolved light hydrocarbons is less than 5 mg / L.

[0035] The amine liquid regeneration tower 400 is used to remove H2S gas in the rich amine liquid to regenerate the amine liquid into a lean amine liquid; the top and bottom of the amine liquid regeneration tower 400 are respectively provided with an acid gas outlet and a lean amine liquid outlet; the bottom of the amine liquid regeneration tower 400 is also provided with a bottom reboiler.

[0036] The amine liquid purifier 500 is used to remove impurities such as steady-state salts and solids in the lean amine liquid to prevent the operation of subsequent equipment from being affected; Figure 5 As shown, the amine liquid purifier 500 adopts a vertical container, and a lean amine liquid inlet 501 and a steam inlet 503 are respectively provided on one side of the container at upper and lower positions, an acid gas outlet 504 is provided on the top, and a lean amine liquid outlet 502 is provided on the bottom. A filter module 505 is provided inside the container, and the filter module 505 is filled with particles of various materials with a particle size of 100-5000 microns. The particle material is preferably ceramic, resin, stainless steel, polysilicon, PTFE, and can remove all solid particles larger than 25 microns in the lean liquid, as well as all thermally stable salts. Preferably, the amine liquid purifier 500 adopts a "one-on, one-standby" mode, which can separate the granular impurities in the lean amine liquid, and can switch between operation and standby according to the operating state. When the filter module 505 is switched because the pressure drop exceeds the set value, the switched amine liquid purifier 500 is backwashed with steam through the steam inlet 503, and the purged acid gas containing H2S is discharged from the acid gas outlet 504 at the top and is used for standby after the backwashing is completed.

[0037] The liquefied gas pre-de-liquidation and de-solidification device 600 is used to remove free amine liquid and particulate impurities entrained in the liquefied gas. Figure 6As shown, the liquefied gas pre-deliquidation and desolidification device adopts a vertical container, a liquefied gas inlet 601 is provided on one side of the container, a liquefied gas outlet 603 and an amine liquid outlet 602 are provided on the top and bottom respectively, and a centrifugal separation module 604 is installed inside the container, which can remove more than 99% of the free amine liquid and particles larger than 10 microns entrained in the liquefied gas.

[0038] The liquefied gas deep deliquoring device 700 is used to quickly separate the emulsified amine liquid entrained in the liquefied gas. The liquefied gas deep deliquoring device 700 adopts a horizontal container, such as Figure 7 As shown, one side of the container is provided with a liquefied gas inlet 701, and the top and bottom of the other side are respectively provided with a liquefied gas outlet 702 and an amine liquid outlet 703. The container is sequentially installed with a multi-interface hybrid fiber module 704 and a rapid separation module 705 from the inlet to the outlet, which can remove the amine liquid entrained in the liquefied gas to less than 5 mg / m 3 The multi-interface hybrid fiber module 704 is preferably formed by adopting the coalescing and guiding module disclosed in CN117509815A and filling fibers between coalescing plates, and the rapid separation module 705 is preferably formed by adopting a corrugated plate.

[0039] The liquefied gas scrubber 800 is used to further absorb a small amount of impurities, H2S, etc. entrained in the liquefied gas by, for example, spraying, so as to further improve the cleanliness of the liquefied gas.

[0040] Further, back to Figure 2 The top of the rich amine liquid pre-dealkylator 200 is also connected to the liquefied gas pre-deliquidation and desolidification device 600 through a pipeline, so as to merge the liquid hydrocarbons separated from the rich amine liquid with the liquefied gas flowing out of the top of the desulfurization tower 100 and then enter the liquefied gas pre-deliquidation and desolidification device 600.

[0041] The acid gas phase outlet 303 of the rich amine liquid flasher 300 is connected to a low-pressure gas system through a pipeline.

[0042] The amine liquid outlet 602 at the bottom of the liquefied gas pre-deliquidation and desolidification device 600 is also connected to the rich amine liquid inlet pipeline of the rich amine liquid flasher 300 through a pipeline, so that the separated amine liquid is mixed with the amine liquid coming out of the rich amine liquid pre-dehydrogenation device 200 and then enters the rich amine liquid flasher 300.

[0043] The amine liquid outlet 703 at the bottom of the liquefied gas deep deliquidator 700 is also connected to the rich amine liquid inlet pipeline of the rich amine liquid flasher 300 through a pipeline, so that the separated amine liquid is mixed with the amine liquid coming out of the rich amine liquid pre-dealkylator 200 and then enters the rich amine liquid flasher 300.

[0044] The production process of the clean production equipment of the amine liquid desulfurization system using the utility model is as follows:

[0045] The sulfur-containing liquefied gas enters the lower part of the desulfurization tower 100 through a pipeline, and at the same time, a weakly alkaline N-methyldiethanolamine aqueous solution (MDEA) as a lean amine liquid absorbent enters the upper part of the desulfurization tower 100 through a pipeline. In the desulfurization tower 100, the sulfur-containing liquefied gas and the lean amine liquid are countercurrently contacted to complete the H2S absorption process, forming a rich amine liquid that flows out from the bottom of the tower.

[0046] The rich amine liquid first enters the rich amine liquid pre-dehydrogenator 200 , where the liquid hydrocarbons entrained in the rich amine liquid are removed to less than 50 mg / L through the coalescence rapid separation module 204 , and the liquid hydrocarbons are recovered to the liquefied gas pre-dehydration and desolidification device 600 .

[0047] The rich amine liquid after hydrocarbon removal enters the rich amine liquid flash evaporator 300. In the flash evaporator, hydrocarbon gas and part of acid gas in the rich amine liquid are quickly separated and discharged into the waste gas removal low-pressure gas system through the liquid hydrocarbon gas phase outlet 302 and the acid gas gas phase outlet 303. Among them, the centrifugal flash module 305, the fiber coalescence separation module 306, the U-shaped oil collecting tank 307 and the baffle 308 can remove the dissolved light hydrocarbons in the rich amine liquid to less than 5 mg / L at a pressure less than 0.01 MPa, and the acid gas is further purified through the fiber coalescence separation module 309 to ensure that the discharged waste gas meets environmental protection standards.

[0048] The rich amine liquid after flashing enters the amine liquid regeneration tower 400. In the regeneration tower, the H2S gas in the rich amine liquid is heated and removed through the tower bottom reboiler, so that the amine liquid is regenerated into lean amine liquid. The acid gas generated during the regeneration process is discharged through the acid gas outlet and enters the acid gas desulfurization recovery unit.

[0049] The regenerated lean amine liquid enters the amine liquid purifier 500, where the impurities such as steady-state salts and solids in the lean amine liquid are removed to ensure the purity of the lean amine liquid. The purified lean amine liquid returns to the desulfurization tower 100 through a pipeline for recycling.

[0050] The liquefied gas flowing out from the top of the desulfurization tower 100 first enters the liquefied gas pre-de-liquidation and de-solidification device 600. Here, the free amine liquid and particulate impurities entrained in the liquefied gas are removed by the centrifugal separation module 604 and recycled to the rich amine liquid flash evaporator 300.

[0051] The pretreated liquefied gas enters the liquefied gas deep deliquidator 700, and the emulsified amine liquid entrained in the liquefied gas is further removed to less than 5 mg / m3 through the multi-interface mixed fiber module 704 and the rapid separation module 705. The emulsified amine liquid is recovered to the rich amine liquid flash evaporator 300 through the amine liquid outlet 703.

[0052] Finally, the liquefied gas enters the liquefied gas scrubber 800 for further processing to ensure the quality of the liquefied gas.

[0053] By adopting the clean production equipment of the amine liquid desulfurization system of the utility model, the hydrocarbon content in the rich amine liquid is reduced from more than 200 mg / L in the original system to less than 5 mg / L, and the amine liquid entrained in the liquefied gas is reduced from 80 mg / m 3 Above reduced to 5 mg / m 3 Below, the amount of acidic waste gas generated is reduced by more than 90%, and the corrosion rate of the amine liquid desulfurization system is reduced from 3mm / a to about 1mm / a, which greatly improves the clean production level of the desulfurization system.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A clean production equipment for an amine liquid desulfurization system, characterized in that: The invention comprises a desulfurization tower for countercurrent absorption of sulfur-containing gas and lean amine liquid, a rich amine liquid pre-dehydrogenator, a rich amine liquid flash evaporator, an amine liquid regeneration tower, and an amine liquid purifier which are connected in series in sequence at the rear end of the rich amine liquid outlet of the desulfurization tower, and a liquefied gas pre-dehydration and desolidification device, a liquefied gas deep dehydrator, and a liquefied gas scrubber which are connected in series in sequence at the rear end of the liquid hydrocarbon outlet of the desulfurization tower; wherein the lean amine liquid outlet of the amine liquid purifier is also connected to the desulfurization tower through a pipeline, so that the regenerated lean amine liquid can be reused for desulfurization of sulfur-containing gas.

2. The clean production equipment of the amine liquid desulfurization system according to claim 1, characterized in that: A rich amine liquid inlet is arranged on one side of the rich amine liquid pre-dehydrogenator, a gas phase outlet and a liquid phase outlet are arranged on the top and the bottom respectively, and a coalescence rapid separation module is installed inside.

3. The clean production equipment of the amine liquid desulfurization system according to claim 1, characterized in that: A rich amine liquid inlet is provided on one side of the rich amine liquid flash evaporator, a rich amine liquid outlet is provided at the bottom of the other side, a liquid hydrocarbon gas phase outlet and an acid gas phase outlet are provided on the top, a fiber coalescence and deliquescence module is also provided at the acid gas phase outlet, and a centrifugal flash module, a fiber coalescence and separation module, a U-shaped oil collecting tank, and a baffle are provided in sequence inside the rich amine liquid flash evaporator from the inlet side to the outlet side.

4. The clean production equipment for amine liquid desulfurization system according to claim 1, characterized in that: The top and bottom of the amine liquid regeneration tower are respectively provided with an acid gas outlet and a lean amine liquid outlet, and the bottom is provided with a tower bottom reboiler.

5. The clean production equipment of the amine liquid desulfurization system according to claim 1, characterized in that: A lean amine liquid inlet and a steam inlet are respectively arranged at upper and lower positions on one side of the amine liquid purifier, an acid gas outlet is arranged at the top, a lean amine liquid outlet is arranged at the bottom, and a filtering module is arranged inside the amine liquid purifier.

6. The clean production equipment for amine liquid desulfurization system according to claim 5, characterized in that: There are two amine liquid purifiers, which adopt a "one on and one on standby" mode.

7. The clean production equipment for amine liquid desulfurization system according to claim 1, characterized in that: A liquefied gas inlet is arranged on one side of the liquefied gas pre-deliquidation and desolidification device, and a liquefied gas outlet and an amine liquid outlet are arranged on the top and the bottom respectively, and a centrifugal separation module is installed inside the liquefied gas pre-deliquidation and desolidification device.

8. The clean production equipment for amine liquid desulfurization system according to claim 1, characterized in that: A liquefied gas inlet is provided on one side of the liquefied gas deep deliquidator, and a liquefied gas outlet and an amine liquid outlet are respectively provided on the top and bottom of the other side. A multi-interface mixed fiber module and a quick separation module are sequentially installed inside the liquefied gas deep deliquidator from the inlet to the outlet.

9. The clean production equipment of the amine liquid desulfurization system according to claim 1, characterized in that: The top of the rich amine liquid pre-dehydrogenator is also connected to the liquefied gas pre-dehydration desolidifier through a pipeline, so as to merge the liquid hydrocarbons separated from the rich amine liquid with the liquefied gas flowing out of the top of the desulfurization tower and then enter the liquefied gas pre-dehydration desolidifier.

10. The clean production equipment of amine liquid desulfurization system according to claim 1, characterized in that: The amine liquid outlets at the bottom of the liquefied gas pre-deliquidation and desolidification device and the liquefied gas deep deliquidation device are also connected to the rich amine liquid inlet pipeline of the rich amine liquid flash evaporator through pipelines, so that the separated amine liquid is mixed with the amine liquid coming out of the rich amine liquid pre-dehydrogenation device and then enters the rich amine liquid flash evaporator.

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