Venturi spraying and acid spraying absorption device

Abstract

The utility model discloses a Venturi spraying and acid spraying absorption device, which belongs to the technical field of air pollution control and comprises a Venturi spraying mechanism communicated with a spraying tower mechanism for removing acid gas. The spray tower mechanism is communicated with a cyclone hydraulic separator for separating high-boiling-point substances in the acid liquor; the cyclone hydraulic separator is communicated with a condenser for further separating high-boiling-point substances in the acid liquor; the cyclone hydraulic separator and the condenser are both communicated with an acid tank for collecting high-boiling residues; the Venturi spraying mechanism comprises a liquid passing assembly, a gas inlet section, a gas-liquid outlet and a diffusion section; the liquid passing assembly is communicated with the gas inlet section and the condenser, the gas inlet section is communicated with the gas-liquid outlet, and the gas-liquid outlet is communicated with the diffusion section; and the upper end of the diffusion section is narrower. According to the structure, pyrolysis gas and acid liquor are fully fused by utilizing the Venturi effect, so that the acid liquor fully absorbs high-boiling residues, and the acid liquor is recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of air pollution control, in particular to a Venturi spray acid absorption device. Background Art

[0002] During the TFE production process, the cracking gas passes through a water scrubber to remove hydrochloric acid and high-boiling substances. Direct use of the water scrubber to treat high-boiling substances often blocks the import and export pipelines, requiring the equipment to be stopped for inspection and maintenance, affecting production and increasing unit consumption.

[0003] Chinese patent CN219186344U discloses a venturi scrubber structure, which allows dust to fully contact with liquid when passing through the venturi scrubber structure, and then passes the flue gas into a separator for purification.

[0004] However, when the structure is used for cracking gas spraying, the liquid used for cracking gas spraying is acidic, and the structure cannot fully recycle the acidic liquid produced after spraying, resulting in waste of resources and increasing the cost of wastewater treatment; secondly, in actual use, in order to further improve the collision efficiency of air, filling balls are added in the tower body. After the filling balls are added, the structure is not convenient for replacement and maintenance of the filling balls, resulting in increased maintenance costs.

[0005] Based on this, the utility model designs a Venturi spray acid absorption device to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a Venturi spray acid absorption device.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A Venturi spray acid absorption device comprises a Venturi spray mechanism, wherein the Venturi spray mechanism is connected to a spray tower mechanism for removing acidic gas;

[0009] The spray tower mechanism is connected to a hydrocyclone separator for separating high boiling substances in the acid solution;

[0010] The hydrocyclone separator is connected to a condenser for further separating high boiling substances in the acid solution;

[0011] The hydrocyclone separator and the condenser are both connected to an acid tank for collecting high boiling products;

[0012] The Venturi spray mechanism includes a liquid passing component, an air inlet section, a gas-liquid outlet and a diffusion section; the liquid passing component is connected to the air inlet section, the liquid passing component is connected to the condenser, the air inlet section is connected to the gas-liquid outlet, and the gas-liquid outlet is connected to the diffusion section; the upper end of the diffusion section is narrower.

[0013] Furthermore, the liquid flow component includes a first liquid inlet pipe, a liquid inlet section and a liquid inlet contraction section; one end of the first liquid inlet pipe is connected to the condenser and the other end is connected to the liquid inlet section, the liquid inlet section is connected to the liquid inlet contraction section, and the liquid inlet contraction section is connected to the air inlet section; the lower end of the liquid inlet contraction section is narrower.

[0014] Furthermore, the air intake section includes an air intake pipe, an air intake contraction section and a throat; the front and rear ends of the throat are connected to the air intake contraction section, and the end of the air intake contraction section away from the throat is connected to the air intake pipe; the end of the air intake contraction section close to the throat is narrower.

[0015] Furthermore, the spray tower mechanism includes a second liquid inlet pipe, a tower body, a liquid pump, a water supply pipe, a drain pipe, a rotating grid plate assembly, a water tank, a fixed baffle and a discharge port; one end of the second liquid inlet pipe is connected to the lower end of the diffusion section, and the other end of the second liquid inlet pipe is connected to the water tank, and the water tank is connected to the tower body, the liquid pump, the water supply pipe and the drain pipe; the liquid pump is connected to the cyclone separator, and a rotating grid plate assembly is installed inside the tower body; a fixed baffle is fixedly connected to the inner bottom of the tower body, and the top of the fixed baffle can store filling balls, and the inner top of the tower body is connected to the discharge port.

[0016] Furthermore, the second liquid inlet pipe, water supply pipe and drainage pipe are all made of carbon steel fluorine-lined pipes.

[0017] Furthermore, the rotating grating plate assembly includes an electric push rod, a driven bar, a transmission gear, a rotating roller and a semi-disc rotating plate; the front and rear sides of the lower end of the tower body are fixedly connected with the electric push rod, the output end of the electric push rod is fixedly connected to the driven bar through a buckle, the left and right sides of the driven bar are symmetrically provided with rotating rollers, there are multiple groups of rotating rollers, both ends of the rotating rollers pass through the tower body, the rotating rollers are rotatably connected to the tower body, both end ends of the rotating rollers are transmission-connected to the driven bar through the transmission gear, the middle part of the rotating roller is fixedly connected with the semi-disc rotating plate, and the top of the semi-disc rotating plate can store filling balls.

[0018] Furthermore, it also includes a limit block, the driven bar is slidably connected to the limit block, and the limit block is fixedly connected to the outer wall of the tower body.

[0019] Furthermore, the fixed baffle plate and the semi-circular rotating plate both adopt a grid plate structure.

[0020] The utility model has the following technical effects:

[0021] 1. The utility model introduces TFE cracked gas into the air inlet pipe of the air inlet section of the Venturi spray mechanism, and the cracked gas enters the throat pipe through the air inlet contraction section, and then enters the diffusion section from the throat pipe through the gas-liquid outlet; because the throat pipe and the gas-liquid outlet are narrow, and the lower ends of the air inlet pipe and the diffusion section are wide, a Venturi effect is generated, the acid liquid in the condenser is sucked out, and enters the liquid inlet section through the first liquid inlet pipe, and because the lower end of the liquid inlet contraction section is narrow, the acid liquid flows out in a jet shape at the lower end of the liquid inlet contraction section, so that the acid liquid is fully in contact with the cracked gas; the structure fully fuses the cracked gas and the acid liquid by utilizing the Venturi effect, so that the acid liquid fully absorbs the high-boiling substances.

[0022] 2. The utility model has a semi-disc rotating plate fixedly connected to the rotating roller of the grid plate assembly of the same group of spray tower mechanisms to form a disc structure; the second liquid inlet pipe passes the liquid and gas in the diffusion section of the Venturi spray mechanism into the water tank, the gas enters the tower body, and the liquid is pumped into the cyclone separator for recycling through the liquid pump; the gas passes through the filling balls on the upper surface of the semi-disc rotating plate of the fixed baffle and the grid plate assembly, passes through the spray of the tower body, and is discharged from the discharge port; after long-term use, the filling balls will be blocked, resulting in reduced spraying efficiency. At this time, the electric push rod is started, the output end of the electric push rod extends out, and the output end of the electric push rod drives the driven bar to move upward through the buckle, the driven bar slides on the inner wall of the limit block, and the driven bar drives the two rotating rollers to rotate through the transmission gear, the rotating roller on the right rotates clockwise, and the rotating roller on the left rotates counterclockwise. The semi-disc rotating plate moves, causing the filling balls on the upper surface of the semi-disc rotating plate to fall to the upper surface of the fixed baffle; under this structure, maintenance workers do not need to climb to a high place to remove the filling balls on the high place, which is convenient for the replacement and maintenance of the filling balls, reduces maintenance costs, and protects the safety of workers; under the continuous operation of the tower body, the acidic substances in the cracking gas are sprayed and absorbed, and the pH value of the acid liquid in the water tank is gradually reduced. Recycling it again will reduce the use effect. Water is added to the water tank through a water pipe to increase the pH value of the acid liquid in the water tank and ensure the spraying efficiency of the acid liquid. When the pH value of the acid liquid in the water tank is low and the water tank is full, it is drained through a drain pipe. After draining, water is added to the water tank through a water pipe to increase the pH value of the acid liquid in the water tank; this structure can realize the recycling of acid liquid, reduce resource waste, and reduce the cost of wastewater treatment.

[0023] 3. The utility model pumps acid liquid into the hydrocyclone separator through the liquid pump of the spray tower mechanism. At this time, the acid liquid contains high-boiling substances, and direct recycling will cause accumulation of high-boiling substances. The high-boiling substances in the acid liquid can be separated by performing two separations through the hydrocyclone separator and the condenser. The separated acid liquid is transported to the second liquid inlet pipe of the liquid passing component of the Venturi spray mechanism by the condenser, and the acid tank is used to collect the high-boiling substances separated by the hydrocyclone separator and the condenser. This structure can realize the separation and collection of high-boiling substances in the acid liquid, prevent blockage caused by accumulation of high-boiling substances, and avoid unnecessary parking for inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 The three-dimensional Figure 1 ;

[0026] Figure 2 It is a front view of the utility model;

[0027] Figure 3 For along Figure 2 AA direction cross-sectional view;

[0028] Figure 4 For along Figure 2 BB direction cross-sectional view;

[0029] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0030] Figure 6 for Figure 4 Enlarged view of point D in the middle.

[0031] The numbers in the figure represent:

[0032] 1. Venturi spray mechanism; 11. Liquid flow assembly; 111. First liquid inlet pipe; 112. Liquid inlet section; 113. Liquid inlet contraction section; 12. Air inlet section; 121. Air inlet pipe; 122. Air inlet contraction section; 123. Throat; 13. Gas-liquid outlet; 14. Diffusion section; 2. Spray tower mechanism; 21. Second liquid inlet pipe; 22. Tower body; 23. Liquid pump; 24. Water supply pipe; 25. Drain pipe; 26. Rotating grid plate assembly; 261. Electric push rod; 262. Follower bar; 263. Limit block; 264. Transmission gear; 265. Rotating roller; 266. Semi-disc rotating plate; 27. Water tank; 28. Fixed baffle; 29. ​​Discharge port; 3. Hydrocyclone separator; 4. Condenser; 5. Acid tank. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The utility model is further described below in conjunction with embodiments.

[0035] In the following description, the terms “left”, “right”, “front”, “back”, “up” and “down” are used to refer to Figure 2 The viewing direction is oriented.

[0036] Please refer to the instruction manual Figure 1-6 , a Venturi spray acid absorption device, comprising a Venturi spray mechanism 1;

[0037] The Venturi spray mechanism 1 includes a liquid passing component 11, an air inlet section 12, a gas-liquid outlet 13 and a diffuser section 14; the liquid passing component 11 is connected to the air inlet section 12, the liquid passing component 11 is connected to the condenser 4, the air inlet section 12 is connected to the gas-liquid outlet 13, and the gas-liquid outlet 13 is connected to the diffuser section 14; the upper end of the diffuser section 14 is narrower;

[0038] The liquid passage assembly 11 includes a first liquid inlet pipe 111, a liquid inlet section 112 and a liquid inlet contraction section 113; one end of the first liquid inlet pipe 111 is connected to the condenser 4 and the other end is connected to the liquid inlet section 112, the liquid inlet section 112 is connected to the liquid inlet contraction section 113, and the liquid inlet contraction section 113 is connected to the air inlet section 12; the lower end of the liquid inlet contraction section 113 is narrower;

[0039] The air intake section 12 includes an air intake pipe 121, an air intake contraction section 122 and a throat pipe 123; both front and rear ends of the throat pipe 123 are connected to the air intake contraction section 122, and one end of the air intake contraction section 122 away from the throat pipe 123 is connected to the air intake pipe 121; the end of the air intake contraction section 122 close to the throat pipe 123 is narrower;

[0040] When in use, TFE cracked gas is introduced into the air inlet pipe 121 of the air inlet section 12 of the Venturi spray mechanism 1, and the cracked gas enters the throat pipe 123 through the air inlet contraction section 122, and then enters the diffusion section 14 through the throat pipe 123 through the gas-liquid outlet 13; because the throat pipe 123 and the gas-liquid outlet 13 are narrow, and the lower ends of the air inlet pipe 121 and the diffusion section 14 are wide, a Venturi effect is generated, the acid liquid in the condenser 4 is sucked out, and enters the liquid inlet section 112 through the first liquid inlet pipe 111, and because the lower end of the liquid inlet contraction section 113 is narrow, the acid liquid will flow out in a jet shape at the lower end of the liquid inlet contraction section 113, so that the acid liquid is fully in contact with the cracked gas; this structure fully fuses the cracked gas and the acid liquid by utilizing the Venturi effect, so that the acid liquid fully absorbs the high-boiling substances;

[0041] The Venturi spray mechanism 1 is connected to a spray tower mechanism 2 for removing acidic gases;

[0042] The spray tower mechanism 2 includes a second liquid inlet pipe 21, a tower body 22, a liquid pump 23, a water supply pipe 24, a drain pipe 25, a rotating grid plate assembly 26, a water tank 27, a fixed baffle 28 and a discharge port 29; one end of the second liquid inlet pipe 21 is connected to the lower end of the diffusion section 14, and the other end of the second liquid inlet pipe 21 is connected to the water tank 27, and the water tank 27 is connected to the tower body 22, the liquid pump 23, the water supply pipe 24 and the drain pipe 25; the liquid pump 23 is connected to the hydrocyclone 3, and a rotating grid plate assembly 26 is installed inside the tower body 22; the inner bottom of the tower body 22 is fixedly connected to the fixed baffle 28, the top of the fixed baffle 28 can store filling balls, and the inner top of the tower body 22 is connected to the discharge port 29;

[0043] Preferably, the second liquid inlet pipe 21, the water supply pipe 24 and the drain pipe 25 are all made of carbon steel lined with fluorine pipes; this structure can reduce leakage;

[0044] The rotating grid plate assembly 26 includes an electric push rod 261, a driven bar 262, a transmission gear 264, a rotating roller 265 and a semi-disc rotating plate 266; the front and rear sides of the lower end of the tower body 22 are fixedly connected with the electric push rod 261, the output end of the electric push rod 261 is fixedly connected with the driven bar 262 through a buckle, and the left and right sides of the driven bar 262 are symmetrically provided with rotating rollers 265, and there are multiple groups of rotating rollers 265. The two ends of the rotating roller 265 pass through the tower body 22, and the rotating roller 265 is rotatably connected to the tower body 22. The end portions of the rotating roller 265 are transmission-connected to the driven bar 262 through the transmission gear 264, and the middle part of the rotating roller 265 is fixedly connected with the semi-disc rotating plate 266, and the top of the semi-disc rotating plate 266 can store filling balls;

[0045] Preferably, it further includes a limit block 263, the driven bar 262 is slidably connected to the limit block 263, and the limit block 263 is fixedly connected to the outer wall of the tower body 22; this structure is used to limit the driven bar 262;

[0046] Preferably, the fixed baffle plate 28 and the semi-circular rotating plate 266 both adopt a grid plate structure; this structure is convenient to use and easy to install;

[0047] When in use, the rotating roller 265 of the grid plate assembly 26 of the same group of spray tower mechanisms 2 is fixedly connected to the semi-disc rotating plate 266 to form a disc structure; the second liquid inlet pipe 21 passes the liquid and gas in the diffusion section 14 of the Venturi spray mechanism 1 into the water tank 27, the gas enters the tower body 22, and the liquid is pumped into the hydrocyclone separator 3 for recycling through the liquid pump 23; the gas passes through the fixed baffle 28 and the filling balls on the upper surface of the semi-disc rotating plate 266 of the grid plate assembly 26, is sprayed by the tower body 22, and is discharged from the discharge port 29; after long-term use, the filling balls will be blocked, resulting in reduced spraying efficiency. At this time, the electric push rod 261 is started, the output end of the electric push rod 261 extends out, and the output end of the electric push rod 261 drives the driven bar 262 to move upward through the buckle, and the driven bar 262 slides on the inner wall of the limit block 263, and the driven bar 262 drives the two rotating rollers 265 to rotate through the transmission gear 264, and the rotating roller 265 on the right side is rotated along The rotating roller 265 on the left rotates clockwise and counterclockwise, so that the filling balls on the upper surface of the semi-disc rotating plate 266 fall to the upper surface of the fixed baffle 28; under this structure, maintenance workers do not need to climb to a high place to remove the filling balls on the high place, which is convenient for the replacement and maintenance of the filling balls, reduces maintenance costs, and protects the safety of workers; under the continuous operation of the tower body 22, the acidic substances in the cracking gas are sprayed and absorbed, and the pH value of the acid solution in the water tank 27 is gradually reduced. Recycling it again will reduce the use effect. Water is injected into the water tank 27 through the water pipe 24 to increase the pH value of the acid solution in the water tank 27 and ensure the spraying efficiency of the acid solution. When the pH value of the acid solution in the water tank 27 is low and the water tank 27 is full, the liquid is drained through the drain pipe 25, and after the liquid is drained, water is injected into the water tank 27 through the water pipe 24 to increase the pH value of the acid solution in the water tank 27; this structure can realize the recycling of the acid solution, reduce resource waste, and reduce the cost of wastewater treatment;

[0048] The spray tower mechanism 2 is connected to a hydrocyclone separator 3 for separating high boiling substances in the acid solution;

[0049] The hydrocyclone separator 3 is connected to a condenser 4 for further separating high boiling substances in the acid solution;

[0050] The hydrocyclone separator 3 and the condenser 4 are both connected to an acid tank 5 for collecting high boiling products;

[0051] During use, the acid liquid is pumped out into the hydrocyclone 3 through the liquid pump 23 of the spray tower mechanism 2. At this time, the acid liquid contains high-boiling substances, and direct recycling will cause accumulation of high-boiling substances. The high-boiling substances in the acid liquid can be separated by performing two separations through the hydrocyclone 3 and the condenser 4. The separated acid liquid is transported to the first liquid inlet pipe 111 of the liquid passing component 11 of the Venturi spray mechanism 1 by the condenser 4, and the acid tank 5 is used to collect the high-boiling substances separated by the hydrocyclone 3 and the condenser 4. This structure can realize the separation and collection of high-boiling substances in the acid liquid, prevent blockage caused by accumulation of high-boiling substances, and avoid unnecessary parking for inspection and maintenance.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A Venturi spray acid absorption device, comprising a Venturi spray mechanism (1), characterized in that: The Venturi spray mechanism (1) is connected to a spray tower mechanism (2) for removing acidic gases; The spray tower mechanism (2) is connected to a hydrocyclone separator (3) for separating high-boiling substances in the acid solution; The hydrocyclone separator (3) is connected to a condenser (4) for further separating high boiling substances in the acid solution; The hydrocyclone separator (3) and the condenser (4) are both connected to an acid tank (5) for collecting high boiling substances; The Venturi spray mechanism (1) comprises a liquid-passing component (11), an air inlet section (12), a gas-liquid outlet (13) and a diffuser section (14); the liquid-passing component (11) is in communication with the air inlet section (12), the liquid-passing component (11) is in communication with the condenser (4), the air inlet section (12) is in communication with the gas-liquid outlet (13), and the gas-liquid outlet (13) is in communication with the diffuser section (14); the upper end of the diffuser section (14) is relatively narrow.

2. The Venturi spray acid absorption device according to claim 1, characterized in that: The liquid passage assembly (11) comprises a first liquid inlet pipe (111), a liquid inlet section (112) and a liquid inlet contraction section (113); one end of the first liquid inlet pipe (111) is connected to the condenser (4) and the other end is connected to the liquid inlet section (112); the liquid inlet section (112) is connected to the liquid inlet contraction section (113); the liquid inlet contraction section (113) is connected to the air inlet section (12); the lower end of the liquid inlet contraction section (113) is relatively narrow.

3. The Venturi spray acid absorption device according to claim 2, characterized in that: The air intake section (12) comprises an air intake pipe (121), an air intake contraction section (122) and a throat pipe (123); both front and rear ends of the throat pipe (123) are connected to the air intake contraction section (122); one end of the air intake contraction section (122) away from the throat pipe (123) is connected to the air intake pipe (121); and one end of the air intake contraction section (122) close to the throat pipe (123) is narrower.

4. The Venturi spray acid absorption device according to claim 3, characterized in that: The spray tower mechanism (2) comprises a second liquid inlet pipe (21), a tower body (22), a liquid pump (23), a water supply pipe (24), a drainage pipe (25), a rotating grid plate assembly (26), a water tank (27), a fixed baffle (28) and a discharge port (29); one end of the second liquid inlet pipe (21) is connected to the lower end of the diffusion section (14), the other end of the second liquid inlet pipe (21) is connected to the water tank (27), the water tank (27) is connected to the tower body (22), the liquid pump (23), the water supply pipe (24) and the drainage pipe (25); the liquid pump (23) is connected to the hydrocyclone (3), and a rotating grid plate assembly (26) is installed inside the tower body (22); the inner bottom of the tower body (22) is fixedly connected to the fixed baffle (28), the top of the fixed baffle (28) can store filling balls, and the inner top of the tower body (22) is connected to the discharge port (29).

5. The Venturi spray acid absorption device according to claim 4, characterized in that: The second liquid inlet pipe (21), the water supply pipe (24) and the drainage pipe (25) are all made of carbon steel fluorine-lined pipes.

6. The Venturi spray acid absorption device according to claim 5, characterized in that: The rotating grid plate assembly (26) comprises an electric push rod (261), a driven bar (262), a transmission gear (264), a rotating roller (265) and a semi-circular rotating plate (266); the front and rear sides of the lower end of the tower body (22) are fixedly connected with the electric push rod (261); the output end of the electric push rod (261) is fixedly connected to the driven bar (262) through a buckle; the left and right sides of the driven bar (262) are symmetrically provided with rotating rollers (265); there are multiple groups of rotating rollers (265); both ends of the rotating rollers (265) pass through the tower body (22); the rotating rollers (265) are rotationally connected to the tower body (22); both end portions of the rotating rollers (265) are transmission-connected to the driven bar (262) through the transmission gear (264); the middle of the rotating rollers (265) is fixedly connected with the semi-circular rotating plate (266); the top of the semi-circular rotating plate (266) can store filling balls.

7. The Venturi spray acid absorption device according to claim 6, characterized in that: It also includes a limit block (263), the driven bar (262) is slidably connected to the limit block (263), and the limit block (263) is fixedly connected to the outer wall of the tower body (22).

8. The Venturi spray acid absorption device according to claim 7, characterized in that: The fixed baffle plate (28) and the semi-circular rotating plate (266) both adopt a grid plate structure.

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