Device with filtering function for improving purity of gasified grey water

Abstract

The utility model discloses a gasification ash water purity improving device with a filtering function, which relates to the technical field of gasification ash water chemical industry and comprises a gasification furnace, the output end of the gasification furnace is communicated with one end of a synthesis ammonia pipeline, and a synthesis gas washing tower for manufacturing synthesis gas and ash water is arranged on the right side of the gasification furnace. The left side of the lower end of the synthesis gas washing tower is communicated with a high-pressure flash tank used for reducing the temperature of grey water and absorbing acid gas through a first grey water pipeline, the right side of the lower end of the synthesis gas washing tower is communicated with one end of a second grey water pipeline, and the second grey water pipeline is provided with a chilling water pump for providing power for grey water transportation and a chilling water filter for filtering grey water. The cyclone separator is arranged between the venturi scrubber and the synthesis gas scrubbing tower, so that water, synthesis gas dust, solid particles and particle coal slime in the venturi scrubber can be removed in the cyclone separator through centrifugal force, scrubbing separation is provided for the synthesis gas cyclone separator, and the purity of synthesis gas and grey water in the scrubbing tower is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gasification ash water chemical industry, in particular to a device with a filtering function for improving the purity of gasification ash water. Background Art

[0002] Synthetic ammonia is a primary raw material for the fertilizer industry and basic organic chemicals. The gasification process utilizes raw coal delivered from the coal storage and transportation section, using gasifier technology to provide crude synthesis gas to the conversion section. The slag water unit is responsible for removing the molten slag from the gasifier. After water cooling and solidification, it is released through a lock hopper and discharged through a slag lift. The black water discharged from the system is sent to a flash evaporation and sedimentation system to remove slag, recover heat, and recycle the ash water. The solids content, hardness, turbidity, and pH of the ash water entering the gasifier have a profound impact on the long-term operation of the gasification system. Properly controlling these parameters of the ash water entering the gasification process not only reduces erosion and thinning of the ash water pipeline, but also prevents scaling and corrosion in the system, effectively extending the gasifier's operating life.

[0003] For example, the system for purifying coal gasification ash water described in patent publication number CN218521119U employs a physical dehydration unit to separate the coal gasification slurry into solids and liquids. Furthermore, vacuum and compressed air lines are used to remove water from the filter cake, reducing the moisture content in the filter cake and the cost of subsequent filter cake processing, as well as the solid content in the filtrate. This system for purifying coal gasification ash water uses squeezing to separate solids and liquids, resulting in a low separation rate. Long-term use can easily lead to clogging of the separation end, resulting in a high content of solid particles in the filter cake and reduced operating accuracy.

[0004] Based on this, a device for improving the purity of gasified ash water with a filtering function is now provided, which can eliminate the disadvantages of the existing device. Utility Model Content

[0005] The purpose of the utility model is to provide a device with a filtering function for improving the purity of gasified ash water, so as to solve the problems in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A device for improving the purity of gasification ash water with a filtering function, comprising a gasifier, the output end of the gasifier being connected to one end of a synthetic ammonia pipeline, a synthesis gas washing tower for producing synthesis gas and ash water being provided on the right side of the gasifier, the left side of the lower end of the synthesis gas washing tower being connected to a high-pressure flash tank for reducing the temperature of the ash water and absorbing acidic gases through a No. 1 ash water pipeline, the right side of the lower end of the synthesis gas washing tower being connected to one end of a No. 2 ash water pipeline, a quenching water pump for providing power for transporting the ash water and a quenching water filter for filtering the ash water being provided on the No. 2 ash water pipeline, the other end of the No. 2 ash water pipeline being connected to the gasifier, At the furnace receiving end, the other end of the synthetic ammonia pipeline is connected to a filtering mechanism that provides filtering and separation for the raw synthetic gas output by the gasifier. The filtering mechanism includes a venturi scrubber. One end of the venturi scrubber is connected to the synthetic ammonia pipeline, and the other end of the venturi scrubber is connected to a cyclone separator that filters and separates the gas dust, solid particles and granular coal slime output by the venturi scrubber. The gas output end of the cyclone separator is connected to an auxiliary recovery structure that provides secondary filtration and recovery of the gas dust separated by the cyclone separator. The ash water output end of the cyclone separator is connected to the high-pressure flash tank through the No. 6 ash water line pipe.

[0008] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In an optional scheme: the auxiliary recovery structure includes a No. 3 gray water pipeline, the cyclone separator outputs the separated gas and dust through the output pipe, the cyclone separator discharges the separated solid particles into the storage through the cone, the No. 3 gray water pipeline is connected to the auxiliary filter, and the right end of the auxiliary filter inputs the filtered gas and dust into the synthesis gas washing tower for washing through the No. 4 gray water line pipe, and a screening component for screening out gas and dust particles is provided inside the auxiliary filter.

[0010] In an optional solution: the screening assembly includes a limiting ring, which is arranged in the middle position of the auxiliary filter, and a number of filter screens for filtering gas dust are arranged on the left side of the limiting ring. A fixed shaft is fixedly connected in the middle of the several filter screens, and the fixed shaft is slidably connected to the sliding groove. The surface of the fixed shaft is provided with an anti-blocking element to prevent the filter screen from being blocked, and a recovery element is provided on the lower side of the auxiliary filter to recover the solid particles filtered out by the filter screen.

[0011] In an optional solution: the anti-blocking element includes a rack, the rack is fixedly connected to the surface of the fixed shaft, a driving device is provided on the upper side of the rack to engage with the rack and drive the rack and the fixed shaft to slide in the sliding groove, and the right end of the fixed shaft is fixedly connected to a shock absorber for buffering the vibration of the fixed shaft.

[0012] In an optional solution: the driving device includes a gear, the gear is meshed with the rack, the gear is fixedly connected to the output end of the rotating motor, and the fixed end of the rotating motor is fixedly connected to the inner wall of the auxiliary filter.

[0013] In an optional solution: the shock absorber includes a permanent magnet No. 1, which is fixedly connected to the right end of the fixed shaft. The auxiliary filter is provided with a buffer groove at the position of the permanent magnet No. 1, and a permanent magnet No. 2 is provided inside the buffer groove to repel the permanent magnet No. 1.

[0014] In an optional solution: the recovery element includes a recovery port, and a recovery port is provided below the filter screen and on the lower side of the auxiliary filter. The recovery port is connected to the cyclone separator through a No. 5 gray water line pipe.

[0015] In an optional solution, a lubricating oil groove is provided inside the sliding groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The utility model provides a cyclone separator between the venturi scrubber and the syngas scrubber, so that water, syngas dust, solid particles, and granular coal slime in the venturi scrubber are removed by centrifugal force in the cyclone separator, providing washing and separation for the syngas cyclone separator, thereby improving the purity of the syngas and ash water in the scrubber. In this way, the dust and solid particles in the ash water entering the gasifier from the syngas scrubber through the quenching water pump are also greatly reduced.

[0018] 2. The utility model sets a gear and a rack. The gear drives the rack and the fixed shaft to slide in the sliding groove by rotating the top, and the fixed shaft drives several filter screens to slide. The filter screen collides with the limit ring during the sliding process. The collision between the filter screen and the limit ring causes the solid particles gathered in the sieve hole of the filter screen to move. During the movement of the filter screen, the detached solid particles move toward the inside of the recovery port under the action of gravity. The recovery port re-inputs the solid particles into the cyclone separator through the No. 5 gray water line pipe for secondary separation, thereby improving the separation quality, reducing the erosion and thinning of the pipe wall by solid particles during the movement, and increasing the service life of the device for improving the purity of gasified gray water with filtering function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 It is a cross-sectional view of the cyclone separator of the present invention.

[0021] Figure 3 It is a cross-sectional view of the auxiliary filter of the present invention.

[0022] Figure 4 This is a schematic structural diagram of the limit ring of the present utility model.

[0023] Figure 5 It is a structural schematic diagram of the filter screen of the present invention.

[0024] Figure 6 This is a structural diagram of the No. 1 permanent magnet and the buffer slot of the utility model.

[0025] Figure 7 This is a schematic structural diagram of the gear and rack of the present invention.

[0026] Notes on the accompanying figures: 101. Gasifier, 102. Synthetic ammonia pipeline, 103. Synthesis gas washing tower, 104. Ash water pipeline No. 1, 105. Ash water pipeline No. 2, 106. High-pressure flash tank, 107. Chilling water pump, 108. Chilling water filter, 201. Venturi scrubber, 202. Cyclone separator, 203. Ash water pipeline No. 3, 204. Auxiliary filter, 205. Ash water pipeline No. 4, 206. Ash water pipeline No. 5, 207. Ash water pipeline No. 6, 301. Output pipe, 302. Cone, 303. Storage tank, 304. Fixed shaft, 305. Filter screen, 306. Limiting ring, 307. Gear, 308. Sliding groove, 309. Rack, 310. Recovery port, 401. Permanent magnet No. 1, 402. Buffer tank. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0028] In one embodiment, Figure 1-Figure 3As shown, a device for improving the purity of gasification ash water with a filtering function includes a gasifier 101. The output end of the gasifier 101 is connected to one end of a synthetic ammonia pipeline 102. A synthesis gas washing tower 103 for producing synthesis gas and ash water is provided on the right side of the gasifier 101. The left side of the lower end of the synthesis gas washing tower 103 is connected to a high-pressure flash tank 106 for reducing temperature and absorbing acidic gases through a No. 1 ash water pipeline 104. The right side of the lower end of the synthesis gas washing tower 103 is connected to one end of a No. 2 ash water pipeline 105. The second ash water pipeline 105 is provided with a quenching water pump 107 for providing power for transporting ash water and a quenching water filter 108 for filtering ash water. The other end of the second ash water pipeline 105 is connected to the receiving end of the gasifier 101. The other end of the synthetic ammonia pipeline 102 is connected to a filtering mechanism for filtering and separating the raw synthetic gas output by the gasifier 101. The filtering mechanism includes a venturi scrubber 201. One end of the venturi scrubber 201 is connected to the synthetic ammonia pipeline 102, and the other end of the venturi scrubber 201 is connected to the receiving end of the gasifier 101. The end is connected to the cyclone separator 202 for filtering and separating the gas dust, solid particles and granular coal slime output by the venturi scrubber 201. The gas output end of the cyclone separator 202 is connected to the auxiliary recovery structure for providing secondary filtration and recovery of the gas dust separated by the cyclone separator 202. The ash water output end of the cyclone separator 202 is connected to the high-pressure flash tank 106 through the No. 6 ash water line pipe 207. The crude synthesis gas is provided by the gasification technology of the gasifier 101. The crude synthesis gas enters the ammonia pipeline 102 through the synthetic ammonia pipeline 102. Inside the Venturi scrubber 201, the cyclone separator 202 separates the raw syngas into gaseous dust, solid particles, and granular coal slime for separation. The cyclone separator 202 then feeds the separated ash water into the high-pressure flash evaporation tank 106 via the No. 6 ash water line pipe 207 for flash evaporation. Syngas and ash water are then produced in the syngas scrubber 103. The ash water is powered by the quenching water pump 107, filtered by the quenching water filter 108, and then re-input into the receiving end of the gasifier 101.

[0029] In this embodiment, if Figure 3-Figure 5As shown, the auxiliary recovery structure includes a No. 3 ash water pipeline 203, the cyclone separator 202 outputs the separated gas dust through the output pipe 301, and the cyclone separator 202 discharges the separated solid particles into the storage 303 through the cone 302. The No. 3 ash water pipeline 203 is connected to the auxiliary filter 204. The right end of the auxiliary filter 204 inputs the filtered gas dust into the synthesis gas washing tower 103 for washing through the No. 4 ash water line pipe 205. The auxiliary filter 204 is provided with a screening component for screening out gas dust particles. The output pipe 301 outputs the separated gas dust, solid particles and granular coal slime to the cyclone separator 202. The cyclone separator 202 uses centrifugal force to separate the gas dust, solid particles and granular coal slime through the cone 302. The cyclone separator 202 inputs the separated gas dust into the auxiliary filter 204 through the output pipe 301 and the No. 3 ash water pipeline 203, and is filtered by the auxiliary filter 204.

[0030] In one embodiment, Figure 2 and Figure 5 As shown, the screening assembly includes a limiting ring 306, which is arranged in the middle of the auxiliary filter 204. A plurality of filter screens 305 for filtering gas dust are provided on the left side of the limiting ring 306. A fixed shaft 304 is fixedly connected in the middle of the plurality of filter screens 305. The fixed shaft 304 is slidably connected to the sliding groove 308. An anti-blocking element is provided on the surface of the fixed shaft 304 to prevent the filter screen 305 from being blocked. A recovery element for recovering solid particles filtered out by the filter screen 305 is provided on the lower side of the auxiliary filter 204. Gas dust enters the interior of the auxiliary filter 204 and is screened out through the sieve holes on the filter screen 305. The limiting condition is provided by the limiting ring 306. The screened solid particles gather on the left side of the filter screen 305 and move downward under the influence of gravity. The screened gas dust is output to the interior of the synthesis gas washing tower 103 through the No. 4 gray water line pipe 205.

[0031] In one embodiment, Figure 6 and Figure 7 As shown, the anti-blocking element includes a rack 309, the surface of the fixed shaft 304 is fixedly connected to the rack 309, and the upper side of the rack 309 is provided with a driving device that engages with the rack 309 and drives the rack 309 and the fixed shaft 304 to slide in the sliding groove 308. The right end of the fixed shaft 304 is fixedly connected to a shock absorber that buffers the vibration of the fixed shaft 304. The sliding groove 308 provides sliding conditions. The sliding of the fixed shaft 304 in the sliding groove 308 drives the plurality of filter screens 305 to collide with the limit ring 306 during the sliding process. The collision between the filter screens 305 and the limit ring 306 causes the solid particles gathered in the sieve holes of the filter screens 305 to move, thereby preventing the filter screens 305 from being blocked.

[0032] In one embodiment, Figure 6 and Figure 7As shown, the driving device includes a gear 307, which is meshed with a rack 309. The gear 307 is fixedly connected to the output end of the rotating motor, and the fixed end of the rotating motor is fixedly connected to the inner wall of the auxiliary filter 204. The top end is powered by the rotation, and the rotating motor drives the gear 307 to rotate. The rotation of the gear 307 drives the fixed shaft 304 to slide in the sliding groove 308. When the tooth block on the gear 307 is not meshed with the rack 309, the filter screen 305 is driven by the wind to move toward the No. 5 gray water line pipe 206.

[0033] In one embodiment, Figure 6 As shown, the shock absorber includes a No. 1 permanent magnet 401, which is fixedly connected to the right end of the fixed shaft 304. The auxiliary filter 204 is provided with a buffer groove 402 at the position of the No. 1 permanent magnet 401. The buffer groove 402 is provided with a No. 2 permanent magnet that repels the No. 1 permanent magnet 401. When the fixed shaft 304 is driven by wind to move toward the limit ring 306, the No. 1 permanent magnet 401 interacts with the No. 2 permanent magnet inside the buffer groove 402 to reduce the impact force and improve the service life.

[0034] In one embodiment, Figure 7 As shown, the recovery element includes a recovery port 310, and a recovery port 310 is provided below the filter 305 and on the lower side of the auxiliary filter 204. The recovery port 310 is connected to the cyclone separator 202 through the No. 5 gray water line pipe 206. During the movement of the filter 305, the detached solid particles move toward the inside of the recovery port 310 under the action of gravity. The recovery port 310 re-inputs the solid particles into the cyclone separator 202 through the No. 5 gray water line pipe 206 for secondary separation, thereby improving the separation quality, reducing the erosion and thinning of the pipe wall by the solid particles during the movement, and increasing the service life of the device with filtering function for improving the purity of gasified gray water.

[0035] The above embodiment discloses a device for improving the purity of gasification ash water with a filtering function, wherein the gasification technology of the gasifier 101 provides crude synthesis gas, which enters the interior of the venturi scrubber 201 through the synthetic ammonia pipeline 102, and is separated into gas dust, solid particles, and granular coal slime by the cyclone separator 202. The cyclone separator 202 uses centrifugal force through the cone 302 to separate the gas dust, solid particles, and granular coal slime. The cyclone separator 202 inputs the separated gas dust into the auxiliary filter 204 through the output pipe 301 and the No. 3 ash water pipeline 203. The cyclone separator 202 filters the separated gas and dust through the output pipe 301 and the No. 3 gray water pipeline 203 and inputs it into the auxiliary filter 204. The gas and dust enter the auxiliary filter 204 and are screened out through the sieve holes on the filter screen 305. The sliding conditions are provided by the sliding groove 308. The power is provided by rotating the top. The rotating motor drives the gear 307 to rotate. The gear 307 rotates and drives the fixed shaft 304 to slide in the sliding groove 308. When the tooth block on the gear 307 is not meshed with the rack 309, the gear 307 is rotated. When the filter screen 305 is closed, it is driven by the wind to move toward the fifth gray water line pipe 206. The sliding of the fixed shaft 304 in the sliding groove 308 drives the plurality of filter screens 305 to slide. The filter screen 305 collides with the limit ring 306 during the sliding process. The collision between the filter screen 305 and the limit ring 306 causes the solid particles gathered in the sieve holes of the filter screen 305 to move, preventing the filter screen 305 from being blocked. The solid particles screened out gather on the left side of the filter screen 305 and move downward under the influence of gravity. The screened gas dust is output to the inside of the synthesis gas washing tower 103 through the fourth gray water line pipe 205. During the movement, the detached solid particles move toward the recovery port 310 under the action of gravity. The recovery port 310 re-inputs the solid particles into the cyclone separator 202 through the No. 5 ash water line pipe 206 for secondary separation. The cyclone separator 202 inputs the separated ash water into the high-pressure flash evaporation tank 106 through the No. 6 ash water line pipe 207 for flash evaporation. Synthesis gas and ash water are produced by the synthesis gas scrubber 103. The ash water is filtered by the quenching water pump 107 and the ash water is re-input into the receiving end of the gasifier 101, thereby improving the purity of the gasified ash water.

[0036] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A device for improving the purity of gasification ash water with a filtering function, comprising a gasifier (101), wherein the output end of the gasifier (101) is connected to one end of a synthetic ammonia pipeline (102), a synthesis gas washing tower (103) for producing synthesis gas and ash water is provided on the right side of the gasifier (101), the left side of the lower end of the synthesis gas washing tower (103) is connected to a high-pressure flash tank (106) for reducing the temperature of ash water and absorbing acidic gases through a No. 1 ash water pipeline (104), the right side of the lower end of the synthesis gas washing tower (103) is connected to one end of a No. 2 ash water pipeline (105), the No. 2 ash water pipeline (105) is provided with a quenching water pump (107) for providing power for transporting ash water and a quenching water filter (108) for filtering ash water, the other end of the No. 2 ash water pipeline (105) is connected to the receiving end of the gasifier (101), and the invention is characterized in that The other end of the synthetic ammonia pipeline (102) is connected to a filtering mechanism for filtering and separating the raw synthetic gas output by the gasifier (101), wherein the filtering mechanism comprises a venturi scrubber (201), one end of the venturi scrubber (201) is connected to the synthetic ammonia pipeline (102), and the other end of the venturi scrubber (201) is connected to a cyclone separator (202) for filtering and separating the gas dust, solid particles and granular coal slime output by the venturi scrubber (201), the gas output end of the cyclone separator (202) is connected to an auxiliary recovery structure for providing secondary filtration and recovery of the gas dust separated by the cyclone separator (202), and the ash water output end of the cyclone separator (202) is connected to the high-pressure flash tank (106) through the No. 6 ash water line pipe (207).

2. The device for improving the purity of gasified ash water with a filtering function according to claim 1, characterized in that: The auxiliary recovery structure includes a No. 3 ash water pipeline (203), a cyclone separator (202) outputs the separated gas dust through an output pipe (301), and the cyclone separator (202) discharges the separated solid particles into the storage (303) through the cone (302). The No. 3 ash water pipeline (203) is connected to the auxiliary filter (204), and the right end of the auxiliary filter (204) inputs the filtered gas dust into the synthesis gas washing tower (103) for washing through the No. 4 ash water line pipe (205). A screening component for screening out gas dust particles is provided inside the auxiliary filter (204).

3. The device for improving the purity of gasified ash water with a filtering function according to claim 2, characterized in that: The screening assembly comprises a limiting ring (306), which is arranged in the middle of the auxiliary filter (204). A plurality of filter screens (305) for filtering gas dust are arranged on the left side of the limiting ring (306). A fixed shaft (304) is fixedly connected in the middle of the plurality of filter screens (305). The fixed shaft (304) is slidably connected to a sliding groove (308). An anti-blocking element for preventing the filter screens (305) from being blocked is arranged on the surface of the fixed shaft (304). A recovery element for recovering solid particles filtered out by the filter screens (305) is arranged on the lower side of the auxiliary filter (204).

4. The device for improving the purity of gasified ash water with a filtering function according to claim 3, characterized in that: The anti-blocking element comprises a rack (309), the surface of the fixed shaft (304) is fixedly connected to the rack (309), the upper side of the rack (309) is provided with a driving device that meshes with the rack (309) and drives the rack (309) and the fixed shaft (304) to slide in the sliding groove (308), and the right end of the fixed shaft (304) is fixedly connected to a shock absorber that buffers the vibration of the fixed shaft (304).

5. The device for improving the purity of gasified ash water with a filtering function according to claim 4, characterized in that: The driving device comprises a gear (307), the gear (307) meshing with a rack (309), the gear (307) being fixedly connected to an output end of a rotating motor, and a fixed end of the rotating motor being fixedly connected to an inner wall of the auxiliary filter (204).

6. The device for improving the purity of gasified ash water with a filtering function according to claim 4, characterized in that: The shock absorber comprises a first permanent magnet (401), the first permanent magnet (401) is fixedly connected to the right end of the fixed shaft (304), the auxiliary filter (204) is provided with a buffer groove (402) at the position of the first permanent magnet (401), and a second permanent magnet is provided inside the buffer groove (402) to repel the first permanent magnet (401).

7. The device for improving the purity of gasified ash water with a filtering function according to claim 3, characterized in that: The recovery element comprises a recovery port (310), which is provided below the filter screen (305) and on the lower side of the auxiliary filter (204). The recovery port (310) is connected to the cyclone separator (202) through the No. 5 gray water line pipe (206).

8. The device for improving the purity of gasified ash water with a filtering function according to claim 3, characterized in that: A lubricating oil groove is provided inside the sliding groove (308).

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