Efficient washing device and method for gasified slag water synthesis gas

Abstract

The invention provides an efficient washing device and method for gasified slag water synthesis gas, and belongs to the technical field of washing towers. The efficient washing device for the gasified slag water synthesis gas comprises a tower body, a spraying mechanism, a filler layer, a flow guide mechanism and an aeration mechanism are sequentially arranged in the tower body from top to bottom, the aeration mechanism comprises a descending pipe, the flow guide mechanism comprises an ascending pipe and a cap, the descending pipe is located in the ascending pipe, and the cap is located in the ascending pipe. The descending pipe is fixedly communicated with an air inlet pipe, the cap is fixedly connected with the descending pipe, and the ascending pipe is provided with a conical disc. In the application, the gas inlet pipe is aerated in the washing liquid through the aeration mechanism, the contact area is increased, preliminary washing is realized, then the gas inlet pipe is pressurized through the gas flow channel between the cap and the conical disc and turns to the upper part, solid impurities and part of liquid are separated by utilizing centrifugal force, and synthesis gas is discharged after being further washed by the filler layer; and the washing effect is improved through multi-section separation.

Description

Technical Field

[0001] The present application relates to the technical field of washing towers, and in particular to a highly efficient washing device and method for gasification slag water synthesis gas. Background Art

[0002] Gasification slag hydrated syngas refers to the water-containing slag obtained by the crude coal gas flow from the top of the gasifier during the coal gasification process, and after preliminary washing, purification and precipitation. This type of gasification slag is usually called gasification fine slag, which is characterized by small particles, with a particle size of less than 0.5 mm, and a high unburned carbon mass fraction, generally reaching more than 30%. The moisture content of gasification fine slag is usually between 50% and 60%.

[0003] The gasified slag water synthesis gas needs to be washed in a washing tower to obtain clean synthesis gas. The existing washing tower usually only includes a spray and a packing layer, and has a simple structure and low washing efficiency. Summary of the invention

[0004] In order to make up for the above deficiencies, the present application provides a highly efficient washing device and method for gasification slag water synthesis gas, aiming to improve the problems mentioned in the above background technology.

[0005] In the first aspect, an embodiment of the present application provides a high-efficiency washing device for gasification slag water synthesis gas, comprising a tower body, wherein a spray mechanism, a packing layer, a guide mechanism and an aeration mechanism are arranged in sequence from top to bottom inside the tower body, the aeration mechanism comprises a downcomer, the guide mechanism comprises an ascending pipe and a cap, the downcomer is located inside the ascending pipe, the downcomer is fixedly connected to an air inlet pipe, the cap is fixedly connected to the downcomer, a cone disk is arranged on the ascending pipe, and a downward inclined airflow channel is formed between the cap and the cone disk.

[0006] In a specific embodiment, the aeration mechanism further comprises an air distribution plate, the air distribution plate is fixedly connected to the pipe opening of the downcomer, and radial ribs are distributed on the surface of the air distribution plate.

[0007] In the above implementation process, the ascending pipe is fixed at the bottom of the tower body, the downcomer, the air distribution plate and the mesh plate are all immersed in the detergent, the synthesis gas enters from the air inlet pipe, and is sprayed into the detergent from the downcomer. The synthesis gas is separated into multiple bubbles by the ribs and dispersed outward along the ribs, achieving a preliminary dispersion effect, increasing the contact area with the detergent, and improving the washing effect.

[0008] In a specific embodiment, a mesh disk is fixedly sleeved on the descending pipe.

[0009] In the above implementation process, the bubbles rise through the mesh plate and are further broken up into small bubbles, further increasing the contact area with the detergent and improving the washing effect. After the bubbles float to the surface, they rise along the riser to below the cap.

[0010] In a specific embodiment, the flow guiding mechanism further comprises a telescopic cylinder, which is installed on the upper edge of the rising tube, the telescopic end of the telescopic cylinder is fixedly connected to the cone disk, and the cone disk is slidably connected to the rising tube.

[0011] In the above implementation process, the telescopic cylinder can be one of an oil cylinder, an electric cylinder and a gas cylinder. The telescopic cylinder pushes the cone disk up and down, thereby adjusting the gap between the cone disk and the cap to pressurize the gas, thereby increasing the gas flow rate and improving the centrifugal separation effect.

[0012] In a specific embodiment, the flow guide mechanism also includes a water guide ring and a water guide plate, the water guide ring is fixedly connected to the inner wall of the tower body, the water guide plate is located below the water guide ring, the lower end of the water guide plate is fixedly connected to a water guide pipe, the water guide pipe is fixedly connected to the tower body, and the water guide pipe runs through the cone plate and the cover cap.

[0013] In the above implementation process, the water falling from the packing layer falls on the water guide ring and the water guide plate, and the water on the water guide ring also falls on the water guide plate, and is finally transported to the detergent at the bottom of the tower body through the water guide pipe. This can prevent water from passing through the position of gas centrifugal separation and avoid liquid carrying in high-speed airflow.

[0014] In a specific embodiment, the spray mechanism includes a water distribution tray and a water pump, the water distribution tray is fixedly connected to the inner wall of the tower body, the inlet of the water pump is connected to the lower end of the tower body, and the outlet of the water pump is fixedly connected to the water distribution tray.

[0015] In the above implementation process, the water pump pumps the detergent at the bottom of the tower body into the water distribution tray above, and sprays it evenly from above the packing layer to achieve the circulation of the detergent.

[0016] In a specific embodiment, the spray mechanism further includes a reversing valve, the outlet of the reversing valve is connected to the inlet of the water pump, one of the outlets of the reversing valve is fixedly connected to the lower end of the tower body, and the other outlet of the reversing valve is provided with a feeding pipe.

[0017] In the above implementation process, when the reversing valve connects the tower body with the water pump, the circulation of the detergent is realized, and when the reversing valve connects the feeding pipe with the water pump, the feeding of the detergent inside the tower body is realized.

[0018] In a specific embodiment, a defoamer is arranged above the water distribution tray.

[0019] In the above implementation process, the demister can further reduce the liquid entrainment of the synthesis gas. A suitable demister, such as a mesh demister or a swirl plate demister, is selected according to the synthesis gas flow rate.

[0020] In a specific embodiment, a gas outlet and a slag discharge port are respectively provided at the upper and lower ends of the tower body.

[0021] In the above implementation process, the synthesis gas from the demister is discharged from the gas outlet. When the detergent is replenished, the detergent and sediment at the bottom of the tower body are first discharged through the slag discharge port. After the slag discharge port is closed, the detergent in the feed pipe is pumped into the water distribution tray through the reversing valve.

[0022] In a second aspect, the present application further provides a method, comprising the above-mentioned gasification slag water synthesis gas efficient washing device; and the following steps:

[0023] S1. Synthesis gas enters from the air inlet pipe and is sprayed into the detergent from the downcomer. The synthesis gas is separated into multiple bubbles by the ribs and dispersed outwards along the ribs.

[0024] S2, the bubbles rise through the mesh disk, are further broken up, and then float to the surface;

[0025] S3, the synthesis gas spreads outward along the gap between the cap and the cone, and accelerates in the gap, bypassing the edge of the cap and rising. When bypassing, the centrifugal force is used to throw the liquid and solid in the gas into the detergent;

[0026] S4, the synthesis gas enters the packing layer from the gap between the water guide plate and the water guide ring, and fully contacts and reacts with the detergent;

[0027] S5. The synthesis gas continues to pass through the demister upwards, and is discharged from the gas outlet after gas-liquid separation.

[0028] Compared with the prior art, the beneficial effects of the present application are: the air intake pipe is aerated in the washing liquid through the aeration mechanism to increase the contact area and achieve preliminary washing; then the air intake pipe is pressurized and turned upward through the air flow channel between the cap and the cone disk, and solid impurities and part of the liquid are separated by centrifugal force; the synthesis gas is discharged after further washing by the packing layer, and multi-stage separation improves the washing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1It is a schematic structural diagram of a cross-sectional view of a high-efficiency washing device for gasification slag water synthesis gas provided in an embodiment of the present application;

[0031] Figure 2 This is a schematic diagram of the structure from an external perspective of a highly efficient washing device for gasification slag water synthesis gas provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of the structural connection relationship between the water guide plate, the cover cap and the cone plate provided in the embodiment of the present application;

[0033] Figure 4 A schematic diagram of the connection relationship between the aeration mechanism and the cone disk provided in the embodiment of the present application;

[0034] Figure 5 Schematic diagram of the steps of a method for efficiently washing gasified slag water synthesis gas provided in an embodiment of the present application.

[0035] In the figure: 10-tower body; 11-air inlet pipe; 12-air outlet; 13-slag discharge port; 20-spraying mechanism; 21-water distribution tray; 22-water pump; 23-reversing valve; 24-feeding pipe; 30-packing layer; 40-flow guide mechanism; 41-rising pipe; 42-cover cap; 43-conical disk; 44-telescopic cylinder; 45-water guide ring; 46-water guide tray; 47-water guide pipe; 50-aeration mechanism; 51-down pipe; 52-air distribution tray; 53-net tray; 60-demister. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0037] See also Figure 1-5 The present application provides a highly efficient scrubbing device for syngas from gasified slag water, comprising a tower body 10, wherein a spray mechanism 20, a packing layer 30, a flow guide mechanism 40 and an aeration mechanism 50 are sequentially arranged inside the tower body 10 from top to bottom, wherein the aeration mechanism 50 comprises a downcomer 51, and the flow guide mechanism 40 comprises an upcomer 41 and a cap 42, wherein the downcomer 51 is located inside the upcomer 41, and an air inlet pipe 11 is fixedly connected to the downcomer 51, and the cap 42 is fixedly connected to the downcomer 51, and a cone disk 43 is arranged on the upcomer 41, and a downwardly inclined air flow channel is formed between the cap 42 and the cone disk 43. Among them, the air inlet pipe 11 is aerated in the scrubbing liquid through the aeration mechanism 50, so as to increase the contact area and realize preliminary scrubbing, and then the air inlet pipe 11 is pressurized and turned upward through the air flow channel between the cap 42 and the cone disk 43, and solid impurities and part of the liquid are separated by centrifugal force, and the syngas is discharged after further scrubbing through the packing layer 30, and the multi-stage separation improves the scrubbing effect.

[0038] See also Figure 1-5The aeration mechanism 50 further includes an air distribution plate 52, which is fixedly connected to the pipe opening of the downcomer 51, and radial ribs are distributed on the surface of the air distribution plate 52. The upcomer 41 is fixed at the bottom of the tower body 10, and the downcomer 51, the air distribution plate 52 and the net plate 53 are all immersed in the detergent. The synthetic gas enters from the air inlet pipe 11 and is sprayed into the detergent from the downcomer 51. The synthetic gas is divided into multiple bubbles by the ribs and dispersed outwards along the ribs, achieving a preliminary dispersion effect, increasing the contact area with the detergent, and improving the washing effect.

[0039] See also Figure 1-5 A mesh plate 53 is fixedly mounted on the downcomer 51. The bubbles rise through the mesh plate 53 and are further broken into small bubbles, further increasing the contact area with the detergent and improving the washing effect. After the bubbles float to the surface, they rise along the upcomer 41 to below the cap 42.

[0040] See also Figure 1-5 The flow guide mechanism 40 further includes a telescopic cylinder 44, which is mounted on the upper edge of the riser 41, and the telescopic end of the telescopic cylinder 44 is fixedly connected to the cone 43, and the cone 43 is slidably connected to the riser 41. The telescopic cylinder 44 can be one of an oil cylinder, an electric cylinder, and a gas cylinder. The telescopic cylinder 44 pushes the cone 43 to move up and down, thereby adjusting the gap between the cone 43 and the cap 42, thereby pressurizing the gas, thereby increasing the gas flow rate and improving the effect of centrifugal separation.

[0041] See also Figure 1-5 The flow guide mechanism 40 further includes a water guide ring 45 and a water guide plate 46. The water guide ring 45 is fixedly connected to the inner wall of the tower body 10. The water guide plate 46 is located below the water guide ring 45. A water guide pipe 47 is fixedly connected to the lower end of the water guide plate 46. The water guide pipe 47 is fixedly connected to the tower body 10 and penetrates the cone plate 43 and the cap 42. The water falling from the packing layer 30 falls on the water guide ring 45 and the water guide plate 46. The water on the water guide ring 45 also falls on the water guide plate 46 and is finally transported to the detergent at the bottom of the tower body 10 through the water guide pipe 47. This can prevent water from passing through the position of gas centrifugal separation and avoid the situation of liquid carrying in the high-speed airflow.

[0042] See also Figure 1-5 The spray mechanism 20 includes a water distribution tray 21 and a water pump 22. The water distribution tray 21 is fixedly connected to the inner wall of the tower body 10. The inlet of the water pump 22 is connected to the lower end of the tower body 10, and the outlet of the water pump 22 is fixedly connected to the water distribution tray 21. The water pump 22 pumps the detergent at the bottom of the tower body 10 into the water distribution tray 21 above, and sprays it evenly from above the packing layer 30 to realize the circulation of the detergent.

[0043] See also Figure 1-5The spray mechanism 20 further includes a reversing valve 23, the outlet of the reversing valve 23 is connected to the inlet of the water pump 22, one of the outlets of the reversing valve 23 is fixedly connected to the lower end of the tower body 10, and the other outlet of the reversing valve 23 is provided with a feeding pipe 24. When the reversing valve 23 connects the tower body 10 with the water pump 22, the circulation of the detergent is realized, and when the reversing valve 23 connects the feeding pipe 24 with the water pump 22, the feeding of the detergent inside the tower body 10 is realized.

[0044] See also Figure 1-5 A demister 60 is disposed above the water distribution tray 21. The demister 60 can further reduce the liquid carrying condition of the synthesis gas. A suitable demister 60, such as a net demister 60 or a cyclone plate demister 60, is selected according to the flow rate of the synthesis gas.

[0045] See also Figure 1-5 The tower body 10 is provided with a gas outlet 12 and a slag outlet 13 at the upper and lower ends. The synthesis gas from the demister 60 is discharged from the gas outlet 12. When the detergent is replenished, the detergent and sediment at the bottom of the tower body 10 are firstly discharged through the slag outlet 13. After the slag outlet 13 is closed, the detergent in the feed pipe 24 is pumped into the water distribution tray 21 through the reversing valve 23.

[0046] See also Figure 1-4 The present application further provides a method, comprising the above-mentioned gasification slag water synthesis gas efficient washing device; and the following steps:

[0047] S1, the synthesis gas enters from the air inlet pipe 11, and is sprayed into the detergent from the downcomer 51. The synthesis gas is divided into multiple bubbles by the ribs and dispersed outward along the ribs;

[0048] S2, the bubbles rise through the mesh plate 53, are further dispersed, and then float to the surface;

[0049] S3, the synthesis gas spreads outward along the gap between the cap 42 and the cone 43, and accelerates in the gap, bypassing the edge of the cap 42 and rising. When bypassing, the liquid and solid in the gas are thrown into the detergent by centrifugal force;

[0050] S4, the synthesis gas enters the packing layer 30 from the gap between the water guide plate 46 and the water guide ring 45, and fully contacts and reacts with the detergent;

[0051] S5, the synthesis gas continues to pass through the demister 60 upwards, and is discharged from the gas outlet 12 after gas-liquid separation.

[0052] The working principle of the high-efficiency washing device for gasified slag water synthesis gas is as follows: the synthesis gas enters from the air inlet pipe 11 and is sprayed into the detergent from the downcomer 51. The synthesis gas is divided into multiple bubbles by the ribs and dispersed outward along the ribs to achieve a preliminary dispersion effect, increase the contact area with the detergent, and improve the washing effect. The bubbles rise and pass through the mesh plate 53, and are further broken up into fine bubbles, further increasing the contact area with the detergent and improving the washing effect. After the bubbles float to the surface, they rise along the riser 41 to the bottom of the cap 42, disperse outward along the gap between the cap 42 and the cone plate 43, and accelerate in the gap, bypass the edge of the cap 42 and rise. When bypassing, the centrifugal force is used to throw the liquid and solid in the gas into the detergent. The telescopic cylinder 44 can push the cone plate 43 to move up and down, thereby adjusting the gap between the cap 42 and the cone plate 43. , adjusting the gas pressurization effect, at the same time, the water falling from the packing layer 30 falls on the water guide ring 45 and the water guide plate 46, and the water on the water guide ring 45 will also fall on the water guide plate 46, and finally transported to the detergent at the bottom of the tower body 10 through the water guide pipe 47, so that water can be prevented from passing through the position of gas centrifugal separation, and the high-speed airflow is prevented from carrying liquid. The synthesis gas passes through the packing layer 30 and the demister 60 upward and is discharged from the air outlet 12. In summary, the air inlet pipe 11 is aerated in the washing liquid through the aeration mechanism 50 to increase the contact area and realize preliminary washing. Then the air inlet pipe 11 is pressurized and turned upward through the air flow channel between the cap 42 and the cone disk 43, and the solid impurities and part of the liquid are separated by centrifugal force. The synthesis gas is discharged after further washing through the packing layer 30, and the multi-stage separation improves the washing effect.

[0053] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A highly efficient scrubbing device for gasification slag water synthesis gas, characterized in that: The invention comprises a tower body (10), wherein a spray mechanism (20), a packing layer (30), a flow guide mechanism (40) and an aeration mechanism (50) are arranged in sequence from top to bottom inside the tower body (10), wherein the aeration mechanism (50) comprises a down pipe (51), wherein the flow guide mechanism (40) comprises an up pipe (41) and a cap (42), wherein the down pipe (51) is located inside the up pipe (41), wherein the down pipe (51) is fixedly connected to an air inlet pipe (11), wherein the cap (42) is fixedly connected to the down pipe (51), wherein a cone disk (43) is arranged on the up pipe (41), and wherein a downwardly inclined air flow channel is formed between the cap (42) and the cone disk (43).

2. The high-efficiency scrubbing device for gasification slag water synthesis gas according to claim 1 is characterized in that: The aeration mechanism (50) further comprises an air distribution plate (52), the air distribution plate (52) being fixedly connected to the pipe opening of the downcomer (51), and radial ribs are distributed on the surface of the air distribution plate (52).

3. The high-efficiency scrubbing device for gasification slag water synthesis gas according to claim 2 is characterized in that: A mesh plate (53) is fixedly sleeved on the descending pipe (51).

4. The high-efficiency scrubbing device for gasification slag water synthesis gas according to claim 3 is characterized in that: The flow guide mechanism (40) further comprises a telescopic cylinder (44), wherein the telescopic cylinder (44) is mounted on the upper edge of the rising tube (41), the telescopic end of the telescopic cylinder (44) is fixedly connected to the cone disk (43), and the cone disk (43) is slidably connected to the rising tube (41).

5. The high-efficiency scrubbing device for gasification slag water synthesis gas according to claim 4 is characterized in that: The flow guide mechanism (40) further comprises a water guide ring (45) and a water guide plate (46); the water guide ring (45) is fixedly connected to the inner wall of the tower body (10); the water guide plate (46) is located below the water guide ring (45); a water guide pipe (47) is fixedly connected to the lower end of the water guide plate (46); the water guide pipe (47) is fixedly connected to the tower body (10); and the water guide pipe (47) runs through the cone plate (43) and the cover cap (42).

6. The high-efficiency scrubbing device for gasification slag water synthesis gas according to claim 5, characterized in that: The spray mechanism (20) comprises a water distribution tray (21) and a water pump (22); the water distribution tray (21) is fixedly connected to the inner wall of the tower body (10); the inlet of the water pump (22) is connected to the lower end of the tower body (10); and the outlet of the water pump (22) is fixedly connected to the water distribution tray (21).

7. The high-efficiency scrubbing device for gasification slag water synthesis gas according to claim 6, characterized in that: The spray mechanism (20) further comprises a reversing valve (23), the outlet of the reversing valve (23) being connected to the inlet of the water pump (22), one of the outlets of the reversing valve (23) being fixedly connected to the lower end of the tower body (10), and the other outlet of the reversing valve (23) being provided with a feed pipe (24).

8. The high-efficiency scrubbing device for gasification slag water synthesis gas according to claim 7, characterized in that: A defoamer (60) is arranged above the water distribution tray (21).

9. The high-efficiency scrubbing device for gasification slag water synthesis gas according to claim 8, characterized in that: The tower body (10) is provided with a gas outlet (12) and a slag discharge outlet (13) at the upper and lower ends thereof, respectively.

10. A method, characterized in that A highly efficient washing device for gasification slag water synthesis gas comprising any one of claims 1 to 9; And the following steps: S1, the synthesis gas enters from the air inlet pipe (11) and is sprayed into the detergent from the downcomer (51). The synthesis gas is divided into multiple bubbles by the ribs and dispersed outwards along the ribs; S2, the bubbles rise through the mesh plate (53), are further broken up, and then float to the surface; S3, the synthesis gas spreads outward along the gap between the cap (42) and the cone (43), and is accelerated in the gap, bypassing the edge of the cap (42) and rising, and while bypassing, the liquid and solid in the gas are thrown down into the detergent by centrifugal force; S4, the synthesis gas enters the packing layer (30) from the gap between the water guide plate (46) and the water guide ring (45), and fully contacts and reacts with the detergent; S5. The synthesis gas continues to pass through the demister (60) upwards, and is discharged from the gas outlet (12) after gas-liquid separation.

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