A process for removing impurities from a syngas decarbonization liquid

Abstract

This application relates to a process for removing impurities from a syngas decarbonization liquid, belonging to the technical field of syngas decarbonization. The process comprises the following steps: S1: using heavy oil, oxygen, and steam as raw materials, a gasification device employs the Texaco heavy oil vaporization method and a waste heat boiler process to produce syngas, which is then introduced into a gasifier; S2: a transverse pipe is connected to the gasifier, and a carbon black cleaning device is used to remove carbon black from the inner wall of the transverse pipe. After the syngas leaves the gasifier and undergoes carbon washing to remove carbon black, it passes through the transverse pipe and enters the next purification process; S3: carbon dioxide, hydrogen sulfide, and entrained amine liquid are sequentially removed from the syngas. This application has the effect of purifying and removing impurities from the syngas.

Description

Technical Field

[0001] The present application relates to the technical field of synthesis gas decarbonization, and in particular to a synthesis gas decarbonization liquid impurity removal process. Background Art

[0002] Synthesis gas is a raw gas used as a chemical feedstock. It is primarily produced in a gasification plant using heavy oil, oxygen, and steam as raw materials, using the Texaco heavy oil partial oxidation process and a waste heat boiler process.

[0003] After leaving the gasifier, the syngas undergoes carbon scrubbing to remove carbon black before entering the purification system. The purification system utilizes DEA as an absorbent to remove carbon dioxide and hydrogen sulfide from the syngas, with the entire absorption process taking place within the absorption tower. After the removal of carbon dioxide and hydrogen sulfide, the syngas enters a water scrubber, where it removes entrained amine solution. The syngas is then fed into the butyl octanol unit as feed gas for the OXO reaction. After leaving the absorption tower, the DEA solution, carrying carbon dioxide and hydrogen sulfide, undergoes heat exchange and enters the regeneration tower, where it is depressurized and diluted, releasing carbon dioxide and hydrogen sulfide. The carbon dioxide and hydrogen sulfide are then burned in an acid gas flare, and the DEA solution at the bottom of the tower is recycled.

[0004] After carbon wash to remove carbon black, the syngas passes through a horizontal pipe and enters the purification system for purification and impurity removal. However, even after carbon wash to remove carbon black, a small amount of carbon black remains in the syngas. As the syngas passes through the horizontal pipe, some of the carbon black in the syngas adheres to the inner wall of the horizontal pipe. When the subsequent syngas flow through the horizontal pipe is high, the syngas will blow off the carbon black attached to the inner wall of the horizontal pipe and enter the purification system along with the syngas, thereby reducing the purification and impurity removal efficiency of the purification system. Summary of the Invention

[0005] In order to improve the purification and impurity removal effect of synthesis gas, the present application provides a synthesis gas decarbonization liquid impurity removal process.

[0006] The present application provides a process for removing impurities from a synthesis gas decarbonization liquid, which adopts the following technical solutions:

[0007] A process for removing impurities from a synthesis gas decarbonization liquid comprises the following steps:

[0008] S1: Using heavy oil, oxygen and steam as raw materials in a gasification unit, the Texaco heavy oil vaporization method and waste heat boiler process are used to produce synthesis gas, which is then fed into a gasifier.

[0009] S2: A horizontal pipe is connected to the gasifier. The carbon black cleaning device removes the carbon black on the inner wall of the horizontal pipe. After the synthesis gas leaves the gasifier and undergoes carbon washing to remove the carbon black, it passes through the horizontal pipe and enters the next process for purification;

[0010] S3: Sequentially remove carbon dioxide, hydrogen sulfide and entrained amine liquid from the synthesis gas.

[0011] By adopting the above technical solution, when purifying synthesis gas, the carbon black cleaning device scrapes and cleans the carbon black on the inner wall of the cross tube before the synthesis gas after carbon washing and removal of carbon black passes through the cross tube, thereby reducing the risk of the synthesis gas carrying the carbon black on the inner wall of the cross tube into the purification process when passing through the cross tube, thereby improving the effect of the purification process on purifying and removing impurities from the synthesis gas.

[0012] Optionally, the carbon black cleaning device in step S2 includes: a scraper mechanism for scraping off the carbon black on the inner wall of the horizontal tube, the scraper mechanism including a circular scraper sliding in the horizontal tube, the outer wall of the circular scraper abutting against the inner wall of the horizontal tube, and the circular scraper is provided with a receiving groove for collecting the carbon black;

[0013] a vibration mechanism, which causes the carbon black attached to the circular scraper to fall into the receiving tank through impact;

[0014] The collecting mechanism comprises a receiving box arranged on the outer wall of the horizontal tube. When the circular scraper moves to the position of the receiving box, the receiving groove is connected to the receiving box.

[0015] By adopting the above technical solution, the circular scraper scrapes away the carbon black adhering to the inner wall of the horizontal tube as it slides within the horizontal tube and collects the carbon black in the collection tank. After the circular scraper scrapes away the carbon black, some of the carbon black will adhere to the blade wall of the circular scraper. At this time, the vibration mechanism will cause the circular scraper to vibrate, shaking off the carbon black adhering to the blade wall of the circular scraper and causing it to fall into the collection tank for collection.

[0016] Finally, when the circular scraper moves to the storage box position, the carbon black in the storage groove will fall into the storage box, and then the scraped carbon black will be discharged from the inside of the cross pipe, reducing the risk of carbon black in the cross pipe being mixed into the synthesis gas.

[0017] Optionally, the scraper mechanism further includes a movable plate and a driving member for driving the movable plate to slide, the circular scraper is arranged on one side of the sliding direction of the movable plate, and the movable plate is provided with an air flow groove for the synthetic gas to pass through.

[0018] By adopting the above technical solution, the movable plate can support the circular scraper, improving the stability of the circular scraper when moving inside the transverse tube. In addition, the provision of the air flow groove allows the synthesis gas to pass through the movable plate and the transverse tube, so that the movable plate does not interfere with the flow of synthesis gas.

[0019] Optionally, a filter is provided at the notch of the air flow groove close to the circular scraper side, a baffle is rotatably installed on the side of the air flow groove away from the circular scraper, and a torsion spring is provided on the movable plate to make the baffle tend to approach the filter.

[0020] By adopting this technical solution, the filter screen can filter out carbon black from the syngas as it passes through the airflow slot, reducing the carbon black content in the syngas after it passes through the slot. As the syngas passes through the slot, the baffle, impacted by the airflow, rotates open to allow the syngas to pass through. If no syngas flows into the transverse pipe, or if the airflow into the syngas fluctuates, the baffle, acting under the action of the torsion spring, rotates toward the filter screen and strikes it, knocking any carbon black adhering to the filter screen into the collection trough for collection.

[0021] Optionally, the scraper mechanism further includes a guide plate provided on the movable plate for guiding the carbon black scraped off from the top of the inner wall of the transverse tube so as to fall into the receiving groove.

[0022] By adopting the above technical solution, the carbon black on the top of the horizontal tube is not easily scattered under the action of the guide plate, and can fall into the receiving groove for collection more accurately under the action of the guide plate, thereby improving the collection effect of carbon black.

[0023] Optionally, the vibration mechanism includes an impact assembly and a drive assembly provided on a side of the movable plate away from the circular scraper;

[0024] The impact assembly includes an impact column and an energy storage spring, and the impact column has a tendency to move closer to the movable plate under the action of the energy storage spring;

[0025] The driving assembly drives the impact column to slide and impact the moving plate.

[0026] By adopting the above technical solution, part of the carbon black will fall and adhere to the movable plate after being caught by the circular scraper. At this time, the driving component drives the impact column to slide and compress the energy storage spring. Then, the impact column hits the movable plate under the action of the energy storage spring, causing the movable plate to vibrate, and then the carbon black attached to the movable plate is shaken off into the storage groove for collection.

[0027] Optionally, the driving assembly includes a driving sleeve rotatably mounted on the movable plate and a driving motor driving the driving sleeve to rotate;

[0028] An energy storage groove for allowing the impact column to slide and store energy, and a release groove for allowing the impact column to release energy and impact the moving plate are provided on the outer peripheral wall of the driving sleeve, and the energy storage groove is communicated with the release groove.

[0029] By adopting the above technical solution, the driving motor drives the driving sleeve to rotate. As the driving sleeve rotates, the impact column first moves within the energy storage groove to compress the energy storage spring. Then, when the impact column moves into the release groove, the impact column hits the moving plate under the action of the energy storage spring. Then, by opening multiple energy storage grooves and release grooves on a driving sleeve, the effect of energy storage and release of multiple impact columns can be achieved.

[0030] Optionally, a carbon black outlet is provided at the bottom of the receiving tank, a discharge port is provided on the inner wall of the horizontal tube, which passes through the horizontal tube and is connected to the carbon black outlet, and a push plate is slidingly provided on the inner wall of the horizontal tube to block or open the discharge port so that the carbon black outlet and the discharge port are connected or disconnected, and the push plate slides under the drive of the circular scraper.

[0031] By adopting the above technical solution, when the circular scraper moves to the push plate, the push plate will slide with the movement of the circular scraper to open the discharge port. When the carbon black outlet is connected to the discharge port, the carbon black collected in the storage tank will be discharged from the horizontal pipe from the discharge port.

[0032] Optionally, the collecting mechanism includes a limiting plate that slides on the inner wall of the transverse tube to limit the baffle so that the baffle is not easily rotated significantly, and the inner wall of the transverse tube is provided with a telescopic groove for the limiting plate to slide along the radial direction of the transverse tube;

[0033] When the carbon black outlet is not connected to the discharge port, the limiting plate does not protrude from the telescopic groove under the action of the push plate;

[0034] When the carbon black outlet is connected to the discharge port, the limiting plate protrudes from the telescopic slot and limits the rotation of the baffle.

[0035] By adopting the above technical solution, when the carbon black outlet is connected to the discharge port, the limit plate limits the rotation of the baffle. At this time, relatively clean gas is introduced into the horizontal tube. The relatively clean gas blows the carbon black on the movable plate, circular scraper and baffle into the storage groove and into the storage box.

[0036] Optionally, the storage box is provided with a discharge pipe connected to the interior of the storage box.

[0037] By adopting the above technical solution, as relatively clean gas enters the horizontal pipe, the carbon black collected in the storage tank will be blown into the storage box and discharged through the discharge pipe, thereby improving the effect of cleaning the carbon black.

[0038] In summary, this application includes at least one of the following beneficial technical effects:

[0039] 1. As the circular scraper slides inside the horizontal tube, it scrapes off the carbon black attached to the inner wall of the horizontal tube and collects the carbon black in the storage tank. After the circular scraper scrapes off the carbon black, some of the carbon black will adhere to the blade wall of the circular scraper. At this time, the vibration mechanism will make the circular scraper vibrate, shaking off the carbon black attached to the blade wall of the circular scraper and causing the carbon black to fall into the storage tank for collection. Finally, when the circular scraper moves to the storage box position, the carbon black in the storage tank will fall into the storage box, and the scraped carbon black will be discharged from the inside of the horizontal tube, reducing the risk of carbon black in the horizontal tube being mixed with the synthesis gas;

[0040] 2. When the syngas passes through the airflow slot, the filter can filter the carbon black in the syngas, reducing the carbon black content in the syngas after passing through the airflow slot. When the syngas passes through the airflow slot, the baffle is impacted by the airflow and rotates open to allow the syngas to pass through. If no syngas flows into the horizontal pipe or the airflow of syngas fluctuates, the baffle rotates under the action of the torsion spring and moves toward the filter and hits the filter, thereby knocking the carbon black attached to the filter into the collection tank for collection.

[0041] 3. When the circular scraper moves to the push plate, the push plate will slide with the movement of the circular scraper to open the discharge port. When the carbon black outlet is connected to the discharge port, the carbon black collected in the storage tank will be discharged from the discharge port to the horizontal pipe. When the carbon black outlet is connected to the discharge port, the limit plate limits the rotation of the baffle. At this time, cleaner gas is introduced into the horizontal pipe. The cleaner gas will blow the carbon black on the moving plate, circular scraper and baffle into the storage tank and into the storage box. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a process flow chart of the decarbonization liquid impurity removal process for synthesis gas in the embodiment of the present application.

[0043] Figure 2 It is a three-dimensional cross-sectional view of the carbon black cleaning device in an embodiment of the present application.

[0044] Figure 3 It is a structural diagram of the circular scraper and the movable plate in the embodiment of the present application.

[0045] Figure 4 It is a structural diagram of the scraper mechanism and the vibration mechanism in the embodiment of the present application.

[0046] Figure 5 It is an exploded view of the vibration mechanism in the embodiment of the present application.

[0047] Figure 6 This is a morphological diagram of the carbon black cleaning device in the embodiment of the present application when it moves to the discharge port position.

[0048] Explanation of the accompanying drawings: 1. Scraper mechanism; 11. Circular scraper; 111. Storage groove; 12. Moving plate; 121. Limiting block; 122. Air flow groove; 13. Driving member; 14. Fixed plate; 15. Guide plate; 16. Filter; 17. Baffle; 18. Torsion spring; 2. Vibration mechanism; 21. Impact assembly; 211. Impact column; 212. Energy storage spring; 213. Energy storage plate; 214. Toggle column; 22. Driving assembly; 221. Driving sleeve; 222. Driving motor; 223. Driving gear; 224. Meshing teeth; 225. Energy storage groove; 226. Release groove; 3. Collecting mechanism; 31. Storage box; 32. Limiting plate; 33. Telescopic spring; 34. Push plate; 35. Compression spring; 36. Discharge pipe; 37. Abutment ring. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-6 This application is described in further detail.

[0050] The embodiments of the present application disclose a process for removing impurities from synthesis gas decarbonization liquid.

[0051] Reference Figure 1 The process for removing impurities from the decarbonization liquid of syngas comprises the following steps:

[0052] S1: Using heavy oil, oxygen and steam as raw materials in a gasification unit, the Texaco heavy oil vaporization method and waste heat boiler process are used to produce synthesis gas, which is then fed into a gasifier.

[0053] S2: A horizontal pipe is connected to the gasifier. The carbon black cleaning device removes the carbon black on the inner wall of the horizontal pipe. After the synthesis gas leaves the gasifier and undergoes carbon washing to remove the carbon black, it passes through the horizontal pipe and enters the next process for purification;

[0054] S3: Sequentially remove carbon dioxide, hydrogen sulfide and entrained amine liquid from the synthesis gas.

[0055] In step S3, DEA is used as an absorbent in the absorption tower to remove carbon dioxide and hydrogen sulfide from the synthesis gas.

[0056] Reference Figure 2 The carbon black cleaning device is installed in the horizontal pipe and includes a scraper mechanism 1, a vibrating mechanism 2, and a collecting mechanism 3. The scraper mechanism 1 scrapes off the carbon black on the inner wall of the horizontal pipe, and the vibrating mechanism 2 hits the scraper mechanism 1 to shake off the carbon black attached to the scraper mechanism 1 and collect it through the collecting mechanism 3.

[0057] Reference Figure 2 and Figure 3The scraper mechanism 1 includes a circular scraper 11, a movable plate 12, a driving member 13, a fixed plate 14 and a guide plate 15. The fixed plate 14 is located on the side of the transverse tube away from the gasifier, and the fixed plate 14 is welded and fixed to the inner wall of the transverse tube. In this embodiment, the driving member 13 is preferably a screw motor, and the screw in the driving member 13 extends through the fixed plate 14 toward the gasifier. The motor in the driving member 13 is fixed to the fixed plate 14 by bolts. The circular scraper 11 is located on the side of the movable plate 12 away from the fixed plate 14, and the circular scraper 11 and the movable plate 12 are integrally formed. The circular scraper 11 is tightly attached to the inner wall of the transverse tube. The driving member 13 drives the movable plate 12 to slide back and forth along the axial direction of the transverse tube. The guide plate 15 is located on the side of the movable plate 12 close to the circular scraper 11, and the carbon black scraped off from the top of the inner wall of the transverse tube by the circular scraper 11 falls into the collection mechanism 3 through the guide plate 15.

[0058] The movable plate 12 is sleeved onto the screw of the driver 13. A stopper 121 is integrally formed on the sidewall of the movable plate 12, near the inner wall of the transverse tube. A stopper slot is defined on the inner wall of the transverse tube. The stopper slot extends in the same direction as the sliding direction of the movable plate 12. The stopper 121 slides within the stopper slot, preventing the movable plate 12 from rotating under the action of the driver 13, and only allowing it to move.

[0059] A receiving groove 111 for collecting the scraped carbon black is provided on the side of the inner wall of the circular scraper 11 close to the ground, and a carbon black outlet is provided at the bottom of the receiving groove 111 to facilitate cleaning out the collected carbon black from the receiving groove 111.

[0060] Reference Figure 2 and Figure 3 The side of the movable plate 12 facing away from the fixed plate 14 is provided with an airflow slot 122 to facilitate the passage of syngas through the movable plate 12. A filter 16 for filtering out carbon black is installed at the notch of the airflow slot 122 facing away from the fixed plate 14. As the syngas passes through the airflow slot 122, some of the carbon black in the syngas adheres to the filter 16.

[0061] Reference Figure 3 and Figure 4 A baffle 17 is rotatably mounted on the notch of the airflow slot 122 on the side close to the fixed plate 14 via a rotating pin. A torsion spring 18 is sleeved on the rotating pin of the baffle 17. One leg of the torsion spring 18 abuts against the side of the movable plate 12 close to the fixed plate 14, and the other leg abuts against the side of the baffle 17 close to the fixed plate 14. Consequently, under the action of the torsion spring 18, the baffle 17 has a tendency to move toward the filter 16. When the synthesis gas passes through the airflow slot 122, the airflow pushes the baffle 17 open and through; when the synthesis gas flow through the airflow slot 122 is unstable, the baffle 17 opens and closes, thereby vibrating the carbon black on the filter 16.

[0062] Reference Figure 4 and Figure 5 The vibration mechanism 2 includes an impact assembly 21 and a drive assembly 22. Both the impact assembly 21 and the drive assembly 22 are mounted on the side of the movable plate 12 facing away from the circular scraper 11. The drive assembly 22 drives the impact assembly 21 to impact the movable plate 12, thereby knocking off the carbon black attached to the movable plate 12. Multiple groups of impact assemblies 21 are provided. The multiple groups of impact assemblies 21 have the same structure and are evenly spaced circumferentially around the screw of the drive member 13 as the central axis. The following description uses one group of impact assemblies 21 as an example.

[0063] The impact assembly 21 includes an impact column 211, an energy storage spring 212, and an energy storage plate 213. The energy storage plate 213 is an L-shaped plate. The end of the horizontal plate of the energy storage plate 213 facing away from the vertical plate is welded to the side of the movable plate 12 facing away from the circular scraper 11. The energy storage spring 212 is located between the vertical plate of the energy storage plate 213 and the movable plate 12. One end of the energy storage spring 212 is welded to the vertical plate of the energy storage plate 213, and the other end is welded to the impact column 211. The impact column 211 then impacts the movable plate 12 through the compression and expansion of the energy storage spring 212.

[0064] Reference Figure 4 and Figure 5 The drive assembly 22 includes a drive sleeve 221 and a drive motor 222. The drive motor 222 is mounted on the side of the movable plate 12 facing away from the circular scraper 11. A drive gear 223 is keyed to the motor shaft of the drive motor 222. A rotary bearing is mounted on the side of the movable plate 12 where the drive motor 222 is mounted, and the drive sleeve 221 is rotatably mounted on the rotary bearing. A circle of meshing teeth 224 is formed on the inner wall of the drive sleeve 221. The drive motor 222 is located inside the drive sleeve 221. The meshing teeth 224 mesh with the drive gear 223, thereby driving the drive sleeve 221 to rotate.

[0065] A toggle post 214 is integrally formed on one side of the impact post 211, near the outer wall of the drive sleeve 221. The outer circumferential wall of the drive sleeve 221 is provided with an energy storage groove 225 and a release groove 226, into which the toggle post 214 is inserted, thereby driving the sliding movement of the impact post 211. If the energy storage groove 225 and the release groove 226 constitute a set of drive grooves, then multiple sets of drive grooves are provided in this embodiment, and the multiple sets of drive grooves are interconnected.

[0066] The energy storage groove 225 is arranged obliquely on the outer peripheral wall of the drive sleeve 221. That is, along its extension direction, one end of the energy storage groove 225 is located on the side of the drive sleeve 221 closest to the movable plate 12; the other end is located on the side of the drive sleeve 221 facing away from the movable plate 12. Consequently, when the drive sleeve 221 rotates, the toggle post 214, constrained by the energy storage groove 225, drives the impact post 211 to slide away from the movable plate 12, thereby compressing the energy storage spring 212. A release groove 226 is provided along the axial direction of the drive sleeve 221. One end of the release groove 226 communicates with the end of the energy storage groove 225 facing away from the movable plate 12, and the other end communicates with the end of the other energy storage groove 225 closer to the movable plate 12. Then, the driving post 214 moves from the energy storage slot 225 into the release slot 226 as the driving sleeve 221 rotates. When the driving post 214 is in the release slot 226 , the impact post 211 impacts the moving plate 12 under the action of the energy storage spring 212 .

[0067] Reference Figure 2 and Figure 6 The collection mechanism 3 includes a storage box 31, a limiting plate 32, a telescopic spring 33, a push plate 34, a compression spring 35 and a discharge pipe 36. The storage box 31 is welded to the outer wall of the horizontal tube close to the ground and is connected to the inside of the horizontal tube to collect the carbon black in the storage tank 111. The discharge pipe 36 is integrally formed on the storage box 31 and is connected to the storage box 31. The limiting plate 32 limits the baffle 17, and when clean gas is introduced into the horizontal tube, the baffle 17 is not easy to rotate significantly; most of the gas will enter the storage box 31 from the horizontal tube and be discharged from the discharge pipe 36, thereby blowing off the carbon black on the movable plate 12. The telescopic spring 33 drives the limiting plate 32 to extend and retract to limit or give way to the baffle 17. The compression spring 35 drives the push plate 34 to slide along the axial direction of the transverse tube, thereby limiting the limit plate 32 so that when the circular scraper 11 passes the position of the limit plate 32, the limit plate 32 does not interfere with the circular scraper 11.

[0068] The outer wall of the transverse tube is provided with a discharge port connected to the storage box 31, and the discharge port penetrates the wall thickness of the transverse tube. When the carbon black outlet is connected to the discharge port, the carbon black in the storage tank 111 will fall into the storage box 31. A telescopic slot is provided on the inner wall of the transverse tube, and a limit plate 32 is slidably installed in the telescopic slot. One end of the telescopic spring 33 is welded to the bottom of the telescopic slot, and the other end is welded to the limit plate 32, thereby driving the limit plate 32 to protrude from the telescopic slot. The limit plate 32 is provided with an inclined surface on the side close to the movable plate 12, so that when the movable plate 12 is reset, force is applied to the limit plate 32 so that it slides in the telescopic slot without interference.

[0069] Reference Figure 2 and Figure 6The inner wall of the transverse tube is provided with a groove for the push plate 34 to be inserted into. An abutment ring 37 is also fixed to the inner wall of the transverse tube. One end of the compression spring 35 abuts the abutment ring 37, and the other end abuts the push plate 34. Multiple sets of push plates 34 and compression springs 35 are provided. One push plate 34 blocks the discharge port. When the circular scraper 11 pushes the push plate 34 to slide, the corresponding push plate 34 moves to no longer block the discharge port. At this time, the carbon black outlet is connected to the discharge port, allowing the carbon black to fall into the storage box 31.

[0070] The principle of the impurity removal process for decarbonizing syngas liquid in this embodiment is as follows: A driver 13 drives the movable plate 12 to move axially along the transverse tube, while the circular scraper 11 scrapes away carbon black adhering to the inner wall of the transverse tube. At this point, the push plate 34, under the action of the compression spring 35, blocks the discharge port. Simultaneously, the push plate 34 constrains the limiting plate 32 within the expansion slot, preventing it from protruding beyond the slot.

[0071] During the movement of the movable plate 12, the carbon black on the top of the transverse tube falls into the receiving groove 111 under the action of the guide plate 15, and the carbon black on the side wall and bottom of the transverse tube automatically enters the receiving groove 111 under the shape of the circular scraper 11. At the same time, relatively clean gas or synthesis gas can be introduced into the transverse tube. As the airflow into the transverse tube becomes unstable, the baffle 17 rotates under the action of the torsion spring 18 and beats the filter 16 to knock the carbon black off the filter 16.

[0072] In addition, the driving motor 222 drives the driving sleeve 221 to rotate, and the impact column 211 slides under the action of the energy storage groove 225 and the release groove 226 and hits the movable plate 12 under the action of the energy storage spring 212, causing the movable plate 12 to vibrate to shake off the carbon black on the movable plate 12 and make the carbon black fall into the receiving groove 111.

[0073] When the circular scraper 11 moves to the position of the push plate 34, the circular scraper 11 pushes the push plate 34 to slide. At this time, the push plate 34 moves without blocking the discharge port. When the carbon black outlet and the discharge port are connected, the carbon black in the storage groove 111 enters the storage box 31. The push plate 34 does not limit the position of the limit plate 32. The limit plate 32 extends from the expansion groove under the action of the expansion spring 33 and limits the baffle 17.

[0074] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A process for removing impurities from synthesis gas decarbonization liquid, characterized in that: The following steps are involved: S1: Using heavy oil, oxygen and steam as raw materials in a gasification unit, the Texaco heavy oil vaporization method and waste heat boiler process are used to produce synthesis gas, which is then fed into a gasifier. S2: A horizontal pipe is connected to the gasifier. The carbon black cleaning device removes the carbon black on the inner wall of the horizontal pipe. After the synthesis gas leaves the gasifier and undergoes carbon washing to remove the carbon black, it passes through the horizontal pipe and enters the next process for purification; S3: Sequentially remove carbon dioxide, hydrogen sulfide and entrained amine liquid from the synthesis gas; The carbon black cleaning device in step S2 comprises: a scraper mechanism (1) for scraping off the carbon black on the inner wall of the transverse tube, the scraper mechanism (1) comprising a circular scraper (11) sliding in the transverse tube, the outer wall of the circular scraper (11) abutting against the inner wall of the transverse tube, and a receiving groove (111) for collecting the carbon black being provided on the circular scraper (11); A vibration mechanism (2) causes the carbon black attached to the circular scraper (11) to fall into the receiving groove (111) through impact; The collecting mechanism (3) comprises a storage box (31) provided on the outer wall of the transverse tube, and when the circular scraper (11) moves to the position of the storage box (31), the storage groove (111) is communicated with the storage box (31); The scraper mechanism (1) further comprises a movable plate (12) and a driving member (13) for driving the movable plate (12) to slide, the circular scraper (11) being arranged on one side of the sliding direction of the movable plate (12), and an air flow slot (122) for allowing synthesis gas to pass through being formed on the movable plate (12); A filter screen (16) is provided at the notch of the air flow groove (122) on the side close to the circular scraper (11), a baffle (17) is rotatably installed on the side of the air flow groove (122) away from the circular scraper (11), and a torsion spring (18) is provided on the movable plate (12) to make the baffle (17) have a tendency to approach the filter screen (16).

2. The process for removing impurities from decarbonized synthesis gas according to claim 1, characterized in that: The scraper mechanism (1) further comprises a guide plate (15) arranged on the movable plate (12) for guiding the carbon black scraped off from the top of the inner wall of the transverse tube so as to fall into the receiving groove (111).

3. The process for removing impurities from decarbonized synthesis gas according to claim 1, characterized in that: The vibration mechanism (2) comprises an impact assembly (21) and a drive assembly (22) arranged on a side of the movable plate (12) facing away from the circular scraper (11); The impact assembly (21) comprises an impact column (211) and an energy storage spring (212), and the impact column (211) has a tendency to move closer to the movable plate (12) under the action of the energy storage spring (212); The driving assembly (22) drives the impact column (211) to slide and impact the moving plate (12).

4. The process for removing impurities from decarbonized synthesis gas according to claim 3, characterized in that: The driving assembly (22) includes a driving sleeve (221) rotatably mounted on the movable plate (12) and a driving motor (222) driving the driving sleeve (221) to rotate; An energy storage groove (225) for enabling the impact column (211) to slide and store energy, and a release groove (226) for enabling the impact column (211) to release energy and impact the movable plate (12) are provided on the outer peripheral wall of the driving sleeve (221), and the energy storage groove (225) is communicated with the release groove (226).

5. The process for removing impurities from decarbonized synthesis gas according to claim 1, characterized in that: The bottom of the receiving tank (111) is provided with a carbon black outlet, the inner wall of the transverse tube is provided with a discharge port that passes through the transverse tube and is connected to the carbon black outlet, and a push plate (34) is slidably provided on the inner wall of the transverse tube to block or open the discharge port so that the carbon black outlet and the discharge port are connected or disconnected, and the push plate (34) slides under the drive of the circular scraper (11).

6. The process for removing impurities from decarbonized synthesis gas according to claim 5, characterized in that: The collecting mechanism (3) includes a limiting plate (32) that slides on the inner wall of the transverse tube to limit the baffle (17) so that the baffle (17) is not easily rotated significantly. The inner wall of the transverse tube is provided with a telescopic groove for the limiting plate (32) to slide along the radial direction of the transverse tube. When the carbon black outlet is not connected to the discharge port, the limiting plate (32) does not protrude from the telescopic groove under the action of the push plate (34); When the carbon black outlet is connected to the discharge port, the limiting plate (32) protrudes from the telescopic slot and limits the rotation of the baffle (17).

7. The process for removing impurities from decarbonized synthesis gas according to claim 6, characterized in that: The storage box (31) is provided with a discharge pipe (36) that is in communication with the interior of the storage box (31).

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