A gas-liquid centrifugal separation device

Abstract

The present invention discloses a gas-liquid centrifugal separation device, wherein the top of the tank body is fixed with an air outlet through a connecting base, the lower part of the side is provided with an air inlet, and the bottom end is connected to a liquid storage tank through a liquid discharge pipe; the middle part of the connecting base is connected with a central vent pipe through a bearing A, the central vent pipe extends into the tank body from top to bottom, the bottom end of the central vent pipe is fixedly connected with a rotating shaft, the rotating shaft is connected to the tank body through a bearing B, the rotating shaft extends out of the tank body and is fixedly connected to the output shaft of the motor; mesh holes are evenly provided on the central vent pipe, and a screen mesh coaxially arranged therewith is provided on the outer wall of the central vent pipe. The present invention ingeniously utilizes the significant density difference between gas and liquid impurities. Under the action of centrifugal force, liquid impurities will be quickly thrown out of the mesh holes of the central vent pipe, and gas will continue to flow upward through the central vent pipe, thereby realizing efficient separation of gas and liquid impurities, ensuring the purity and cleanliness of the gas, and having significant promotion prospects.

Description

Technical Field

[0001] The invention relates to the field of gas-liquid separation equipment, in particular to a gas-liquid centrifugal separation device. Background Art

[0002] Biomass gas is an emerging renewable energy source. It uses relatively dry (water content is generally <20%) biomass as gasification raw materials, mainly by-products, residues and wastes of agriculture, forestry production and wood processing, such as crop straw, rice husks, corn cobs, dead wood, tree stumps, branches, board skin, broken wood, shavings, sawdust, etc. After drying, crushing and removing debris, they are put into the biomass gasifier, and an appropriate amount of gasifying agent (such as air, water vapor, etc.) is input into the furnace to ignite. The gasified raw materials undergo oxidation-reduction reaction under oxygen-deficient conditions (the oxygen supply is 20% to 28% of the theoretical oxygen supply required for complete combustion of the gasified raw materials). After gasification, the combustible mixed gas generated is biomass gas, and its main combustible components are CO, H2 and CH4. However, with the high-temperature cracking of biomass, biochar, wood tar, wood vinegar and other substances are produced. The solid biochar can be directly collected from the bottom of the gasifier, while wood tar, wood vinegar and other substances often overflow and are collected at the same time as the biomass gas. Therefore, in order to obtain biomass gas with higher purity, the wood tar, wood vinegar and other substances must be separated and recovered to achieve biomass gas purification.

[0003] At present, the equipment used for gas-liquid separation is mainly gravity sedimentation separator. However, gravity sedimentation separator has the disadvantages of low separation efficiency, large equipment size, large space occupation, poor separation effect, and serious entrainment of liquid impurities. If it is used for biomass gas purification, it will directly affect the purity of the gas. Therefore, it is urgent to develop a gas-liquid separator that can effectively separate biomass gas from oily substances such as wood tar and wood vinegar, and realize the purification of biomass gas. Summary of the invention

[0004] In view of the above technical problems, the technical problem to be solved by the present invention is to utilize the significant density difference between gas and liquid so that the liquid can be thrown out at high speed and adhere to the separation wall under the action of centrifugal force, and then due to the characteristics of gravity convergence, a gas-liquid centrifugal separation device is provided, which can effectively separate biomass gas from oily impurities such as wood tar and wood vinegar under the action of centrifugal force, and realize the purification of biomass gas.

[0005] In order to solve the above technical problems, a gas-liquid centrifugal separation device described in the present invention includes a tank body, which is supported by a bracket, and the top of the tank body is fixed with an air outlet through a connecting base, an air inlet is opened at the lower part of the side, and the bottom end is connected to the liquid storage tank through a liquid discharge pipe; a central ventilation pipe is connected to the middle part of the connecting base through a bearing A, and the central ventilation pipe extends into the interior of the tank body from top to bottom, and a rotating shaft is fixedly connected to the bottom end of the central ventilation pipe, and the rotating shaft is connected to the tank body through a bearing B, and the rotating shaft extends out of the tank body and is fixedly connected to the output shaft of the motor; mesh holes are evenly opened on the central ventilation pipe, and a screen coaxially arranged on the outer wall of the central ventilation pipe is provided.

[0006] Furthermore, the sieve includes sieve A and sieve B, and the sieve A and sieve B are both coaxially arranged with the central ventilation pipe, and the sieve A and the sieve B, and the sieve B and the central ventilation pipe are connected by a support rod A.

[0007] Furthermore, the liquid storage tank is installed on the ground through a support, a pressure supply pipe is connected to the top of the liquid storage tank, a liquid discharge pipe is arranged at the bottom, and a liquid level meter is arranged on the side.

[0008] Furthermore, guide plates are evenly and fixedly connected to the inner wall of the tank body.

[0009] Furthermore, the connecting plate of the air outlet is connected to the connecting base via bolts, the connecting base is connected to the tank body via the bolts, a bearing cover is provided at the outward end of the bearing B, and the bearing cover is connected to the tank body via the bolts.

[0010] Furthermore, the bottom end of the air outlet is connected to the top end of the middle ventilation pipe.

[0011] Furthermore, the rotating shaft 25 is fixedly connected to the middle ventilation pipe 26 via a support rod B29.

[0012] Furthermore, the liquid discharge pipe is provided with a liquid discharge valve, the liquid discharge pipe is provided with a liquid discharge valve, and the pressure supply pipe is provided with an air valve.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] (1) The present invention ingeniously utilizes the significant density difference between gas and liquid impurities. After the gas carrying liquid impurities enters the middle vent pipe in the tank body, the liquid impurities will be quickly thrown out from the mesh of the middle vent pipe under the action of centrifugal force, and continue to be thrown to the inner wall of the tank body. During this process, the gas will continue to flow upward through the middle vent pipe and enter the next processing link from the gas outlet. The thrown-out liquid impurities will adhere to the screen or the inner wall of the tank body, and then due to their own gravity, they will gather at the bottom of the tube body and enter the liquid storage tank through the liquid discharge pipe for storage, thereby achieving efficient separation of gas and liquid impurities, ensuring the purity and cleanliness of the gas, and having significant promotion prospects.

[0015] (2) The present invention provides a double-layer screen, namely, screen A and screen B, coaxially arranged on the outer wall of the central vent pipe, and utilizes the mesh holes of the double-layer screen to effectively improve the efficiency of hanging out liquid impurities.

[0016] (3) The present invention is connected to a liquid storage tank at the bottom of the tank body through a liquid discharge pipe, which can effectively collect liquid impurities generated by filtration, thereby preventing the liquid from flowing into the external environment, causing environmental pollution and waste of resources. At the same time, by arranging a liquid level gauge on the side of the liquid storage tank, it is greatly convenient to understand the storage amount of liquid impurities in the liquid storage tank in real time. By connecting a pressure supply at the top of the liquid storage tank, it can effectively solve the technical problem of difficult drainage caused by the adhesive force between oily impurities and the inner wall of the liquid storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 for Figure 1 Top view of the middle AA surface.

[0019] Figure 3 for Figure 1 A partial enlarged view of area B.

[0020] Figure 4 Schematic diagram of the positional relationship between the screen A, screen B and the middle ventilation pipe of the present invention.

[0021] Figure 5 It is a schematic diagram of the connection relationship between the rotating shaft and the middle ventilation pipe of the present invention.

[0022] In the figure: 1. tank body, 2. guide plate, 3. connecting base, 4. air outlet, 5. connecting plate, 6. bolt, 7. bearing A, 8. screen A, 9. screen B, 10. air inlet, 11. drain valve, 12. drain pipe, 13. liquid level gauge, 14. pressure supply pipe, 15. air valve, 16. liquid accumulation box, 17. drain pipe, 18. drain valve, 19. support, 20. bracket, 21. motor, 22. output shaft, 23. bearing cover, 24. bearing B, 25. rotating shaft, 26. middle vent pipe, 27. mesh, 28. support rod A, 29. support rod B. DETAILED DESCRIPTION

[0023] The present invention will be further described below by taking the purification of biomass fuel gas as an example with reference to the accompanying drawings.

[0024] like Figure 1 , 2 A gas-liquid centrifugal separation device shown in , 3 and 4 comprises a tank body 1, which is supported by a bracket 20, the top of the tank body 1 is fixed with an air outlet 4 through a connecting base 3, the lower part of the side is provided with an air inlet 10, and the bottom end is connected to a liquid storage tank 16 through a liquid discharge pipe 12; a middle vent pipe 26 is connected to the middle part of the connecting base 3 through a bearing A7, the middle vent pipe 26 extends into the tank body 1 from top to bottom, the bottom end of the middle vent pipe 26 is fixedly connected with a rotating shaft 25, the rotating shaft 25 is connected to the tank body 1 through a bearing B24, the rotating shaft 25 extends out of the tank body 1 and is fixedly connected to the output shaft 22 of the motor 21; mesh holes 27 are evenly provided on the middle vent pipe 26, and a screen arranged coaxially therewith is provided on the outer wall of the middle vent pipe 26.

[0025] In order to ensure the separation effect, the screen includes screen A8 and screen B9. Screen A8 and screen B9 are coaxially arranged with the middle ventilation pipe 26, and the diameter of screen B9 is smaller than that of screen A8. In order to ensure the centrifugal working stability of screen A8 and screen B9, screen A8 and screen B9, and screen B9 and the middle ventilation pipe 26 are connected by support rod A28.

[0026] In order to ensure the installation stability of the liquid storage tank 16, the liquid storage tank 16 is installed on the ground through a support 19. In order to facilitate real-time understanding of the storage amount of liquids such as wood tar and wood vinegar in the liquid storage tank 16, a liquid level meter 13 is provided on the side of the liquid storage tank 16. In order to ensure the smooth discharge of wood tar and wood vinegar in the liquid storage tank 16, a pressure supply pipe 14 is connected to the top of the liquid storage tank 16. In order to discharge wood tar and wood vinegar, a drain pipe 17 is provided at the bottom of the liquid storage tank 16.

[0027] In order to prompt the separated wood tar, wood vinegar and other liquid droplets to gather in time and fall into the bottom of the tank body 1, the inner wall of the tank body 1 is evenly and fixedly connected with a guide plate 2.

[0028] To facilitate disassembly, the connecting plate 5 of the air outlet 4 is connected to the connecting base 3 by bolts 6, and the connecting base 3 is connected to the tank body 1 by bolts 6. In order to protect the bearing B24, a bearing cover 23 is provided at the outward end of the bearing B24, and the bearing cover 23 is connected to the tank body 1 by bolts 6.

[0029] In order to ensure that the gas flows upward smoothly and flows out from the gas outlet 4 , the bottom end of the gas outlet 4 is connected to the top end of the middle vent pipe 26 .

[0030] In order to ensure that the gas smoothly enters the middle ventilation pipe 26 from the bottom end of the middle ventilation pipe 26, the rotating shaft 25 is fixedly connected to the middle ventilation pipe 26 through the support rod B29, and there is a gap between adjacent support rods B29.

[0031] In order to conveniently control the discharge of liquid wood tar and wood vinegar, a discharge valve 11 is provided on the discharge pipe 12, and a discharge valve 18 is provided on the discharge pipe 17. In order to control the air input amount and ensure the smooth discharge of wood tar and wood vinegar, an air valve 15 is provided on the pressure pipe 14.

[0032] In order to ensure that the screens A8 and B9 can be taken out of the tank body 1 for cleaning after being disassembled, the diameter of the connection between the bottom of the connection base 3 and the tank body 1 is larger than the diameter of the screen A8.

[0033] The specific working process of the present invention is as follows:

[0034] Before work, the air outlet 4 is connected to the air inlet of the next level of processing process through the induced draft fan, ensuring that the drain valve 18 is closed and the drain valve 11 is opened, and the motor 21 is energized. After the motor 21 drives the rotation speed of the middle ventilation pipe 26, the screen A8, and the screen B9 to stabilize, the biomass gas carrying wood vinegar and wood tar is introduced into the tank body 1 from the air inlet 10, and the tank body 1 enters the working state at this time; after the biomass gas carrying wood vinegar and wood tar enters the middle ventilation pipe 26 from the bottom of the middle ventilation pipe 26 due to the suction force of the induced draft fan, and due to the force of the motor 21, the middle ventilation pipe 26, the screen A8, and the screen B9 will be driven to rotate at a high speed through the output shaft 22 and the rotating shaft 25, so that the airflow entering the middle ventilation pipe 26 is affected by the centrifugal force. Under the influence of continuous centrifugal force, the wood vinegar and wood tar Liquid impurities such as carbon dioxide and carbon dioxide will be thrown toward the wall of the middle vent pipe 26 due to their high density, and fly out of the mesh 27 and be thrown toward the inner wall of the screen B9. At this time, some droplets will adhere to the inner wall of the screen B9, and another part will pass through the screen B9 and be thrown toward the screen A8. At this time, some droplets will adhere to the inner wall of the screen A8, and another part will pass through the screen A8 and be thrown toward the inner wall of the tank body 1 and adhere to it. The wood vinegar and wood tar droplets attached to the middle vent pipe 26, the screen B9, the screen A8, and the inner wall of the tank body 1 will flow downward or fall under the action of their own gravity, and gather at the bottom of the tank body 1, thereby being discharged from the liquid discharge pipe 12 into the liquid storage tank 16. In this process, the separated biomass gas will continue to flow upward through the middle vent pipe 26 under the action of the induced draft fan and enter the next level of processing from the gas outlet 4.

[0035] As liquid oily impurities such as wood tar and wood vinegar continue to flow into the liquid storage tank 16, the storage amount of liquid oily impurities such as wood tar and wood vinegar in the liquid storage tank 16 can be understood in real time through the liquid level meter 13. When the liquid level reaches a certain height, the drain valve 18 on the drain pipe 17 can be opened, and the air valve 15 on the pressure supply pipe 14 can be opened. Liquid oily impurities such as wood tar and wood vinegar will gradually flow from the drain pipe 17 into the next treatment process under the action of air pressure.

[0036] When the entire separation equipment has been used for a long time and a large amount of oily impurities have adhered to the screen A8, the screen B9 and the middle vent pipe 26, the output shaft 22 of the motor 21 can be disassembled and separated from the rotating shaft 25, and the bolt 6 can be loosened to remove the air outlet 4 and the connecting base 3, and the screen A8, the screen B9 and the middle vent pipe 26 can be lifted out of the top of the tank body 1 for cleaning. After cleaning, they can be installed in situ, which can effectively ensure the separation effect.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solution of the present invention does not depart from the spirit and scope of the technical solution of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A gas-liquid centrifugal separation device, comprising a tank body (1), wherein the tank body (1) is supported by a bracket (20), characterized in that: The top of the tank body (1) is fixed with an air outlet (4) through a connecting base (3), the lower part of the side is provided with an air inlet (10), and the bottom end is connected to the liquid storage tank (16) through a liquid discharge pipe (12); the middle part of the connecting base (3) is connected with a central ventilation pipe (26) through a bearing A (7), the central ventilation pipe (26) extends from top to bottom into the interior of the tank body (1), the bottom end of the central ventilation pipe (26) is fixedly connected with a rotating shaft (25), the rotating shaft (25) is connected to the tank body (1) through a bearing B (24), the rotating shaft (25) extends from the bottom of the tank body (1) and is fixedly connected to the output shaft (22) of the motor (21); mesh holes (27) are evenly provided on the central ventilation pipe (26), and a screen arranged coaxially with the central ventilation pipe (26) is arranged on the outer wall of the central ventilation pipe (26); The liquid storage box (16) is installed on the ground through a support (19). The top of the liquid storage box (16) is connected to a pressure supply pipe (14), the bottom is provided with a discharge pipe (17), and the side is provided with a liquid level meter (13). The discharge pipe (12) is provided with a discharge valve (11), and the discharge pipe (17) is provided with a discharge valve (18). The pressure supply pipe (14) is provided with an air valve (15). The screen includes a screen A (8) and a screen B (9). The screen A (8) and the screen B (9) are both coaxially arranged with the middle ventilation pipe (26), and the screen A (8) and the screen B (9) are connected with the middle ventilation pipe (26) through a support rod A (28). The bottom end of the air outlet (4) is connected to the top end of the middle ventilation pipe (26).

2. A gas-liquid centrifugal separation device according to claim 1, characterized in that: The inner wall of the tank body (1) is evenly and fixedly connected with a guide plate (2).

3. A gas-liquid centrifugal separation device according to claim 1, characterized in that: The connecting plate (5) of the air outlet (4) is connected to the connecting base (3) via bolts (6), and the connecting base (3) is connected to the tank body (1) via the bolts (6). A bearing cover (23) is provided at the outward end of the bearing B (24), and the bearing cover (23) is connected to the tank body (1) via the bolts (6).

4. A gas-liquid centrifugal separation device according to claim 1, characterized in that: The rotating shaft (25) is fixedly connected to the middle ventilation pipe (26) via a support rod B (29).

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