Water-coal-slurry gasification slag pool capable of preventing slag blockage

Abstract

The utility model discloses a water-coal-slurry gasification slag pool capable of preventing slag blockage, the water-coal-slurry gasification slag pool is divided into a front bin and a rear bin by a partition plate, and a first overflow valve and a second overflow valve are arranged on the side wall of the front bin; the first overflow valve is connected with the first flow guide pipe, and the second overflow valve is connected with the second flow guide pipe. According to the utility model, the two overflow valves on the front bin are connected with the two corresponding flow guide pipes, and the outlets of the flow guide pipes are arranged near the inlets of the two slag pool pumps, so that ash at the inlets of the pumps is impacted, mixed and raised by utilizing overflow water, and the blockage is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of water coal slurry gasification, and particularly relates to a water coal slurry gasification slag pool for preventing slag blockage. Background Technique

[0002] During the water coal slurry gasification process, the gasifier needs to discharge slag once every 30 minutes during normal operation. At this time, a large amount of slag water enters the slag pool and is statically precipitated in the front bin of the slag pool. Then, the slag water with a low solid content overflows into the rear bin, and is sent to the subsequent treatment process by the slag pool pump. However, although most of the ash slag has settled in the front bin of the slag pool, about 3% of the slag water with solid content still overflows into the rear bin of the slag pool, causing slag accumulation and blockage in the rear bin of the slag pool.

[0003] At present, an aeration device is generally installed on the rear bin, and the aeration is used to disturb the sedimentation of ash slag. However, there are still some ash slag settling and accumulating at the inlet of the slag pool pump, burying the inlet pipeline of the standby slag pool pump or even filling the pump cavity, resulting in the inability to use the slag pool pump as a standby. It needs to be disassembled, inspected, flushed, discharged and then reinstalled before it can operate normally, seriously affecting the stable operation of production.

[0004] Chinese Patent CN218900927U discloses a clarification device for the slag pool of a water coal slurry gasifier, which includes a turbid water bin and a clear water bin of the slag pool. A baffle is arranged between the clear water bin and the turbid water bin of the slag pool. A grid plate is arranged in the turbid water bin of the slag pool, and the grid plate divides the turbid water bin of the slag pool into a buoyancy inlet bin and a slag scraping bin. A slag scraper is arranged in the slag scraping bin; a corrugated hose is arranged in the buoyancy inlet bin, one end of the corrugated hose is provided with a buoyancy inlet device, the buoyancy inlet device is located in the buoyancy inlet bin, and the other end of the corrugated hose penetrates through the baffle and extends into the clear water bin of the slag pool. The clear water bin of the slag pool is connected to the turbid water bin of the slag pool through the corrugated hose. It solves the problems that large particle coal slag in the turbid water bin of the slag pool may enter the clear water bin of the slag pool and be pumped by the slag pool pump, resulting in serious wear and short service life of the slag pool pump, overheavy load of the sedimentation tank, and reduced efficiency of the slag scraper, affecting the periodic operation of the gasification system. It prolongs the service life of the slag pool pump, reduces the sedimentation load, and improves the efficiency of the slag scraper.

[0005] Chinese Patent CN210458068U discloses a slag blocking and dredging device and a water coal slurry gasifier for a water coal slurry gasifier, which uses a hydraulic rod and a slag crushing device to crush or directly push out the furnace slag from the slag discharge channel, effectively dredging the slag discharge channel and enabling the production to proceed smoothly.

[0006] However, the existing technology still fails to solve the problem that the slag pool pump and / or the preheating water pump in the rear bin of the slag pool are prone to blockage. Summary of the Invention

[0007] To solve the above technical problems, the utility model provides a slag pool for water coal slurry gasification that prevents slag blockage. Two overflow valves on the front bin are connected to corresponding two diversion pipes, and the outlets of the diversion pipes are arranged near the inlets of the slag pool pump and the preheating water pump. The overflow water is used to impact, mix and lift the ash slag at the pump, avoiding blockage.

[0008] To achieve the above object, the utility model provides a slag pool for water coal slurry gasification that prevents slag blockage. The slag pool for water coal slurry gasification is divided into a front bin and a rear bin by a partition board. A first overflow valve and a second overflow valve are arranged on the side wall of the front bin; the first overflow valve is connected to a first diversion pipe, and the second overflow valve is connected to a second diversion pipe.

[0009] Preferably, a first drain opening is arranged on the first diversion pipe, and the first drain opening is close to the inlet position of the first slag pool pump.

[0010] Further preferably, a first support hoop and a second support hoop are arranged on the first diversion pipe.

[0011] Preferably, a second drain opening is arranged on the second diversion pipe, and the second drain opening is close to the inlet position of the second slag pool pump.

[0012] Further preferably, a third support hoop and a fourth support hoop are arranged on the second diversion pipe.

[0013] Preferably, a slag scraper is arranged in the front bin, and a scraper is arranged in the slag scraper and is connected by a chain.

[0014] Preferably, an aeration device is arranged in the rear bin, and an aeration control valve is arranged on the aeration device.

[0015] Preferably, a preheating water inlet, a cooling low-pressure ash water inlet, a slag pool pump circulation port, a nitrogen purging port and a venting port are arranged at the top of the rear bin.

[0016] Preferably, an inclined ladder is arranged at one end of the front bin, and a maintenance manhole, a drainage port and a shaft seal air pipeline are arranged at the side bottom.

[0017] Further preferably, the shaft seal air pipeline is connected to the slag scraper.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. Two overflow valves are arranged on the side wall of the front bin. The overflow valves are connected to the diversion pipes, and the outlets of the diversion pipes are close to the inlets of the slag pool pump and the preheating water pump, and cooperate with the aeration device to disturb the water body in the rear bin, avoiding the ash slag remaining in the inlet bin from blocking the slag pool pump and the preheating water pump.

[0020] 2. A slag scraper is arranged in the front bin, which can help clean the ash slag deposited in the front bin. Description of the Drawings

[0021] Figure 1 This is the top view of the overall structure section of the present utility model.

[0022] Figure 2 This is the front view of the present utility model.

[0023] In the figure, 1 is the first diversion pipe, 2 is the first overflow valve, 3 is the first drain port, 4 is the first slag sump pump, 5 is the first support hoop, 6 is the second support hoop, 7 is the second diversion pipe, 8 is the second overflow valve, 9 is the second drain port, 10 is the second slag sump pump, 11 is the third support hoop, 12 is the fourth support hoop, 13 is the front bin, 14 is the rear bin, 15 is the partition plate, 16 is the slag scraper, 17 is the aeration device, 18 is the preheated water inlet, 19 is the cooling low-pressure ash water inlet, 20 is the slag sump pump circulation port, 21 is the nitrogen purge port, 22 is the vent port, 23 is the chain, 24 is the drain port, 25 is the inclined ladder, 26 is the slag inlet, 27 is the shaft seal air pipeline, 28 is the maintenance manhole, 29 is the scraper, 30 is the aeration control valve. Detailed implementation manners

[0024] The technical solutions of the present utility model will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the following embodiments are only the preferred embodiments of the present utility model and should not be construed as limitations on the present utility model. The protection scope of the present utility model shall be subject to the content recorded in the claims. Modifications and substitutions made by those skilled in the art to the technical solutions of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] As Figure 1 shown, a water coal slurry gasification slag sump for preventing slag blockage, the water coal slurry gasification slag sump is divided into a front bin 13 and a rear bin 14 by a partition plate 15, and the side wall of the front bin 13 is provided with a first overflow valve 2 and a second overflow valve 8; the first overflow valve 2 is connected to the first diversion pipe 1, and the second overflow valve 8 is connected to the second diversion pipe 7.

[0027] Preferably, a first drain port 3 is provided on the first diversion pipe 1, and the first drain port 3 is close to the inlet position of the first slag sump pump 4 to help flush the solid impurities near the inlet of the first slag sump pump 4 and avoid blockage.

[0028] Further preferably, a first support hoop 5 and a second support hoop 6 are provided on the first diversion pipe 1.

[0029] Preferably, a second drain port 9 is provided on the second diversion pipe 7. The second drain port 9 is close to the inlet position of the second slag sump pump 10 to help flush the solid impurities near the inlet of the second slag sump pump 10 and avoid blockage.

[0030] Further preferably, a third support hoop 11 and a fourth support hoop 12 are provided on the second diversion pipe 7.

[0031] Preferably, a slag scraper 16 is provided in the front chamber 13. A scraper 29 is provided in the slag scraper 16 and is connected by a chain 23, facilitating the cleaning of the ash slag deposited inside the front chamber 13.

[0032] Preferably, an aeration device 17 is provided in the rear chamber 14. An aeration control valve 30 is provided on the aeration device 17 to help agitate the ash water in the rear chamber 14 and prevent ash slag from depositing and blocking.

[0033] Preferably, a preheated water inlet 18, a cooling low-pressure ash water inlet 19, a slag pond pump circulation port 20, a nitrogen purging port 21 and a vent port 22 are provided at the top of the rear chamber 14, facilitating the conveyance of various gases and water into the rear chamber 14.

[0034] Preferably, an inclined ladder 25 is provided at one end of the front chamber 13, facilitating the operation personnel to perform maintenance on the top of the slag pond; an inspection manhole 28, a drain port 24 and a shaft seal air pipeline 27 are provided at the side bottom. The inspection manhole 28 can facilitate the operation personnel to enter the inside of the front chamber 13 for maintenance, and the drain port 24 can facilitate the rapid discharge of the sewage and sediments inside the front chamber 13.

[0035] Further preferably, the shaft seal air pipeline 27 is connected to the slag scraper 16 and is used for cleaning the bearings of the slag scraper 16.

Claims

1. A slag pool for water coal slurry gasification to prevent slag blockage, characterized in that: The water coal slurry gasification slag pond is divided into a front bin (13) and a rear bin (14) by a partition plate (15). A first overflow valve (2) and a second overflow valve (8) are provided on the side wall of the front bin (13); the first overflow valve (2) is connected to a first diversion pipe (1), and the second overflow valve (8) is connected to a second diversion pipe (7).

2. The water coal slurry gasification slag pool for preventing slag blockage according to claim 1, characterized in that: A first drain port (3) is provided on the first diversion pipe (1), and the first drain port (3) is close to the inlet position of a first slag pond pump (4).

3. The slag pool for water coal slurry gasification that prevents slag blockage according to claim 2, wherein: A first support hoop (5) and a second support hoop (6) are provided on the first diversion pipe (1).

4. A slag pool for water coal slurry gasification to prevent slag blockage according to claim 1, characterized in that: A second drain port (9) is provided on the second diversion pipe (7), and the second drain port (9) is close to the inlet position of a second slag pond pump (10).

5. The water coal slurry gasification slag pool for preventing slag blockage according to claim 4, wherein: A third support hoop (11) and a fourth support hoop (12) are provided on the second diversion pipe (7).

6. The slag pool for coal water slurry gasification to prevent slag blockage according to claim 1, characterized in that: A slag scraper (16) is provided in the front bin (13), and a scraper (29) is provided in the slag scraper (16) and is connected by a chain (23).

7. A slag pool for water coal slurry gasification to prevent slag blockage according to claim 1, characterized in that: An aeration device (17) is provided in the rear bin (14), and an aeration control valve (30) is provided on the aeration device (17).

8. A slag pool for water coal slurry gasification to prevent slag blockage according to claim 1, characterized in that: A preheated water inlet (18), a cooling low-pressure ash water inlet (19), a slag pond pump circulation port (20), a nitrogen purging port (21) and a vent port (22) are provided at the top of the rear bin (14).

9. The slag pool for water coal slurry gasification to prevent slag blockage according to claim 1, characterized in that: An inclined ladder (25) is provided at one end of the front bin (13), and a maintenance manhole (28), a drain port (24) and a shaft seal air pipeline (27) are provided at the side bottom.

10. A slag pool for water coal slurry gasification to prevent slag blockage according to claim 9, characterized in that; The shaft seal air pipeline (27) is connected to the slag scraper (16).

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