Hydrogen fluoride reaction furnace tail gas absorption device

Abstract

A hydrogen fluoride reaction furnace tail gas absorption device comprises a tail gas treatment box, a tail gas inlet pipe is arranged on one side of the lower end of the tail gas treatment box, a U-shaped communicating pipe is arranged at the end, located on the outer side of the tail gas treatment box, of the tail gas inlet pipe, and the tail gas inlet pipe and the U-shaped communicating pipe are each provided with a tail gas filtering mechanism and a corrugated pipe. The tail gas treatment device has the following advantages that when tail gas is conveyed into the tail gas treatment box through the tail gas inlet pipe, the sealing plate is pushed outwards, and then the sealing plate is made to be far away from the end opening of the tail gas inlet pipe; and when supply of the tail gas is stopped, the tail seat can be pushed upwards under the action of the elastic force of the spring, then the sealing plate can seal the end opening of the tail gas inlet pipe, and the desulfurization reaction slurry is effectively prevented from entering the tail gas treatment box.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas absorption devices, in particular to a tail gas absorption device for a hydrogen fluoride reaction furnace. Background Art

[0002] During the production of hydrogen fluoride, some tail gas needs to be discharged. These tail gases contain a large amount of sulfide. Direct discharge will cause environmental pollution. Therefore, the tail gas needs to be desulfurized to avoid serious pollution. Chinese patent CN214345567U discloses a tail gas absorption device for a hydrogen fluoride production process, including a tail gas treatment box, a waste box is arranged on the inner side of the tail gas treatment box, a reaction chamber is arranged on the upper end face of the waste box, a filter plate is arranged on the upper end face of the reaction chamber, an activated carbon layer is arranged on the upper end face of the filter plate, an exhaust pipe is arranged on the upper end face of the activated carbon layer, a mixer is arranged on one side of the exhaust pipe, a gas pipe is arranged on one side of the tail gas treatment box, a dispersion pipe is arranged at one end of the gas pipe, and a filter screen is arranged on the inner side of the gas pipe. The utility model filters out fine particles in the exhaust gas by arranging a filter screen, prevents the fine particles from adsorbing the desulfurization reaction slurry, makes full use of the desulfurization reaction slurry and prevents waste of resources; and evenly disperses the exhaust gas into the reaction bin by arranging a dispersion pipe, enables the exhaust gas to fully react, prevents sulfur compounds from remaining in the tail gas, and protects the environment.

[0003] The above prior art has the following disadvantages: in the prior art, the dispersion pipe is submerged in the desulfurization reaction slurry. Therefore, when the tail gas inside the dispersion pipe stops supplying, the desulfurization reaction slurry easily enters the dispersion pipe through the holes on the dispersion pipe, thereby easily causing blockage. Therefore, a hydrogen fluoride reactor tail gas absorption device is provided to solve the above problems. Utility Model Content

[0004] In order to solve the problems in the above background technology, the technical solution adopted by the utility model to solve the technical problems is:

[0005] A tail gas absorption device for a hydrogen fluoride reactor comprises a tail gas treatment box, a cavity is arranged in the tail gas treatment box, a discharge port is arranged at the bottom of a tail gas inlet pipe, one end of the tail gas inlet pipe extends into the cavity along the lower part of the side wall of the tail gas treatment box and is arranged above the discharge port, a U-shaped connecting pipe with both ends connected to the tail gas inlet pipe is arranged on the tail gas inlet pipe outside the tail gas treatment box, a tail gas filtering mechanism is arranged on the tail gas inlet pipe between the middle section of the U-shaped connecting pipe and the two ends of the U-shaped connecting pipe, and a tail gas filtering mechanism is arranged between the tail gas filtering mechanism on the U-shaped connecting pipe and the U-shaped connecting pipe on one side and the tail gas inlet pipe on the tail gas inlet pipe. A bellows is provided between the exhaust gas filtering mechanism on the air intake pipe and one side of the exhaust gas intake pipe, and an automatic sealing mechanism is provided at the end portion located at one end of the exhaust gas intake pipe, the automatic sealing mechanism includes a fixed seat, the fixed seat is fixedly connected to the inner wall of the end portion of the exhaust gas intake pipe, a sliding hole is provided in the middle portion of the fixed seat, a plurality of through holes are evenly provided on the fixed seat surrounding the sliding hole, a guide rod is slidably connected in the sliding hole, a sealing plate is covered at the mouth portion of one end of the exhaust gas intake pipe, one end of the guide rod is fixedly connected to the sealing plate, a tail seat is provided at the other end of the guide rod, and a spring is slidably sleeved on the guide rod located between the tail seat and the fixed seat.

[0006] The tail gas absorption device for the hydrogen fluoride reactor, the tail gas filtering mechanism includes a first connector and a second connector, the first connector is a convex structure, the second connector is a concave structure, the first connector is consistent with the second connector, and a filter is provided between the first connector and the second connector.

[0007] In the hydrogen fluoride reactor tail gas absorption device, the first connector and the second connector are connected by bolts.

[0008] In the tail gas absorption device for the hydrogen fluoride reactor, first valve switches are provided at both ends of the U-shaped connecting pipe, and second valve switches are provided at both ends of the tail gas inlet pipe between the two ends of the U-shaped connecting pipe.

[0009] In the tail gas absorption device of the hydrogen fluoride reactor, a sealing plate is provided on one side of the tail gas inlet pipe with a sealing gasket.

[0010] The tail gas absorption device for the hydrogen fluoride reactor is provided with a conical groove at the bottom end of the tail gas treatment box.

[0011] The tail gas absorption device for the hydrogen fluoride reactor is provided with a third valve switch on the discharge port.

[0012] The tail gas absorption device for the hydrogen fluoride reactor is provided with a sealing cover on the top of the tail gas treatment box, and an exhaust pipe is provided at the center of the sealing cover.

[0013] The tail gas absorption device for the hydrogen fluoride reactor is provided with a feed pipe at the upper end of the side wall of the tail gas treatment box.

[0014] The tail gas absorption device for the hydrogen fluoride reactor is provided with a U-shaped support frame between the two sides of the tail gas inlet pipe outside the two ends of the U-shaped connecting pipe.

[0015] The utility model has the following advantages: when the tail gas is transported to the tail gas treatment box through the tail gas intake pipe, the sealing plate is pushed outward, thereby making the sealing plate away from the tail gas intake pipe port, so that the tail gas can enter the tail gas treatment box for neutralization reaction with the desulfurization reaction slurry, and when the tail gas is stopped from being supplied, the tail seat can be pushed upward by the elastic force of the spring, thereby making the sealing plate seal the tail gas intake pipe port, effectively preventing the desulfurization reaction slurry from entering;

[0016] When the filter in the exhaust gas filtering mechanism needs to be replaced, the first valve switch and the second valve switch are closed alternately, and the elastic function of the bellows is used to make the first connector and the second connector contact or separate, so that the filter can be replaced alternately without affecting the normal transmission of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the connection between the automatic sealing mechanism of the utility model and the exhaust gas intake pipe;

[0020] Figure 4 It is a schematic cross-sectional structure diagram of the exhaust gas filtering mechanism of the utility model.

[0021] In the figure: 1. exhaust gas treatment box; 101. cavity; 2. exhaust gas intake pipe; 3. U-shaped connecting pipe; 301. bellows; 4. exhaust gas filtering mechanism; 401. first connector; 402. second connector; 403. filter screen; 5. first valve switch; 6. second valve switch; 7. automatic sealing mechanism; 701. sealing plate; 702. fixing seat; 703. guide rod; 704. tail seat; 705. spring; 706. sliding hole; 707. perforation; 8. conical groove; 9. discharge port; 10. third valve switch; 11. feed pipe; 12. sealing cover; 13. exhaust pipe; 14. U-shaped support frame. DETAILED DESCRIPTION

[0022] The present invention can be explained in more detail through the following embodiments. The present invention is not limited to the following embodiments. The purpose of disclosing the present invention is to protect all changes and improvements within the scope of the present invention.

[0023] Combined with Figures 1 to 4The tail gas absorption device of the hydrogen fluoride reactor comprises a tail gas treatment box 1, a cavity 101 is arranged in the tail gas treatment box 1, a conical groove 8 is arranged at the bottom of the cavity 101, a discharge port 9 is arranged at the bottom of the tail gas treatment box 1, a third valve switch 10 is arranged on the discharge port 9, one end of the tail gas intake pipe 2 extends into the cavity 101 along the lower part of the side wall of the tail gas treatment box 1 and is placed above the discharge port 9, a U-shaped connecting pipe 3 is arranged on the tail gas intake pipe 2 located outside the tail gas treatment box 1, and both ends of the U-shaped connecting pipe 3 are connected to the tail gas intake pipe 2, and the tail gas intake pipe 3 is connected to the tail gas intake pipe 2 between the middle section of the U-shaped connecting pipe 3 and the two ends of the U-shaped connecting pipe 3. The exhaust gas filter mechanism 4 is provided on the U-shaped connecting pipe 3, and a bellows 301 is provided between the exhaust gas filter mechanism 4 on the U-shaped connecting pipe 3 and the U-shaped connecting pipe 3 on one side and between the exhaust gas filter mechanism 4 on the exhaust gas intake pipe 2 and the exhaust gas intake pipe 2 on one side. The exhaust gas filter mechanism 4 includes a first connector 401 and a second connector 402. The first connector 401 is a convex structure, and the second connector 402 is a concave structure. The first connector 401 is consistent with the second connector 402. A filter screen 403 is provided between the first connector 401 and the second connector 402. The first connector 401 and the second connector 402 are connected. The joint 402 is connected by bolts, and a first valve switch 5 is provided at both ends of the U-shaped connecting pipe 3, and a second valve switch 6 is provided at both ends of the exhaust gas intake pipe 2 between the two ends of the U-shaped connecting pipe 3. A U-shaped support frame 14 is provided between the two sides of the exhaust gas intake pipe 2 outside the two ends of the U-shaped connecting pipe 3, and an automatic sealing mechanism 7 is provided at the end portion located at one end of the exhaust gas intake pipe 2. The automatic sealing mechanism 7 includes a fixed seat 702, and the fixed seat 702 is fixedly connected to the inner wall of one end of the exhaust gas intake pipe 2. A sliding hole 706 is provided in the middle of the fixed seat 702, and a fixed seat 702 surrounding the sliding hole 706 is evenly provided. There are multiple through holes 707, the guide rod 703 is slidably connected in the sliding hole 706, the mouth of one end of the exhaust gas intake pipe 2 is covered with a sealing plate 701, one end of the guide rod 703 is fixedly connected to the sealing plate 701, the sealing plate 701 is provided with a sealing gasket on one side of the exhaust gas intake pipe 2, a tail seat 704 is provided at the other end of the guide rod 703, a spring 705 is slidably sleeved on the guide rod 703 located between the tail seat 704 and the fixed seat 702, a sealing cover 12 is provided on the top of the exhaust gas treatment box 1, an exhaust pipe 13 is provided at the center position of the sealing cover 12, and a feed pipe 11 is provided at the upper end of the side wall of the exhaust gas treatment box 1.

[0024] The tail gas absorption device for the hydrogen fluoride reactor described in the utility model is implemented. When the utility model is used, the desulfurization reaction slurry is first injected into the tail gas treatment box 1 through the feed pipe 11. After an appropriate amount is injected, the tail gas is transported to the tail gas treatment box 1 through the tail gas intake pipe 2. When the tail gas circulates inside the tail gas intake pipe 2, the sealing plate 701 is pushed outward under the air pressure, thereby making the sealing plate 701 away from the port of the tail gas intake pipe 2, so that the tail gas enters the tail gas treatment box 1 and reacts with the desulfurization reaction slurry. When the tail gas stops being transported, the sealing plate 701 is tightly pressed against the mouth of the tail gas intake pipe 2, so that the gas in the tail gas treatment box 1 will not appear. Backflow phenomenon, when it is necessary to replace the filter 403 in the exhaust gas filtering mechanism 4 provided on the U-shaped connecting pipe 3, the two first valve switches 5 on the U-shaped connecting pipe 3 are closed, and the elasticity of the bellows 301 provided on the U-shaped connecting pipe 3 is utilized to separate the first connector 401 and the second connector 402 in the exhaust gas filtering mechanism 4 provided on the U-shaped connecting pipe 3, so that the filter 403 in the exhaust gas filtering mechanism 4 on the U-shaped connecting pipe 3 can be replaced. Similarly, the filter 403 in the exhaust gas filtering mechanism 4 on the exhaust gas intake pipe 2 can be replaced by closing the two second valve switches 6 on the exhaust gas intake pipe 2.

[0025] The parts not described in detail in this utility model are prior art.

Claims

1. A tail gas absorption device for a hydrogen fluoride reactor, comprising a tail gas treatment box (1), characterized in that: A cavity (101) is provided in the exhaust gas treatment box (1), a discharge port (9) is provided at the bottom of the exhaust gas treatment box (1), one end of the exhaust gas intake pipe (2) extends into the cavity (101) along the lower part of the side wall of the exhaust gas treatment box (1) and is placed above the discharge port (9), a U-shaped connecting pipe (3) is provided on the exhaust gas intake pipe (2) located outside the exhaust gas treatment box (1), both ends of which are connected to the exhaust gas intake pipe (2), an exhaust gas filtering mechanism (4) is provided on the exhaust gas intake pipe (2) in the middle section of the U-shaped connecting pipe (3) and between the two ends of the U-shaped connecting pipe (3), a corrugated pipe (301) is provided between the exhaust gas filtering mechanism (4) on the U-shaped connecting pipe (3) and one side of the U-shaped connecting pipe (3) and between the exhaust gas filtering mechanism (4) on the exhaust gas intake pipe (2) and one side of the exhaust gas intake pipe (2) ), an automatic sealing mechanism (7) is provided at an end portion located at one end of the exhaust gas intake pipe (2), the automatic sealing mechanism (7) comprising a fixing seat (702), the fixing seat (702) being fixedly connected to the inner wall of an end portion of the exhaust gas intake pipe (2), a sliding hole (706) being provided in the middle portion of the fixing seat (702), a plurality of perforations (707) being evenly provided on the fixing seat (702) surrounding the sliding hole (706), a guide rod (703) being slidably connected in the sliding hole (706), a sealing plate (701) being covered at the end portion of the exhaust gas intake pipe (2), one end of the guide rod (703) being fixedly connected to the sealing plate (701), a tail seat (704) being provided at the other end of the guide rod (703), and a spring (705) being slidably sleeved on the guide rod (703) located between the tail seat (704) and the fixing seat (702).

2. The hydrogen fluoride reactor tail gas absorption device according to claim 1, characterized in that: The exhaust gas filtering mechanism (4) comprises a first connector (401) and a second connector (402); the first connector (401) is a convex structure, the second connector (402) is a concave structure, the first connector (401) matches the second connector (402), and a filter screen (403) is provided between the first connector (401) and the second connector (402).

3. The hydrogen fluoride reactor tail gas absorption device according to claim 2, characterized in that: The first connecting head (401) and the second connecting head (402) are connected via bolts.

4. The hydrogen fluoride reactor tail gas absorption device according to claim 1, characterized in that: Both ends of the U-shaped connecting pipe (3) are provided with a first valve switch (5), and both ends of the exhaust gas intake pipe (2) located between the two ends of the U-shaped connecting pipe (3) are provided with a second valve switch (6).

5. The hydrogen fluoride reactor tail gas absorption device according to claim 1, characterized in that: The sealing plate (701) is located on one side of the exhaust gas intake pipe (2) and is provided with a sealing gasket.

6. The hydrogen fluoride reactor tail gas absorption device according to claim 1, characterized in that: A conical groove (8) is provided at the bottom end of the cavity (101).

7. The hydrogen fluoride reactor tail gas absorption device according to claim 1, characterized in that: A third valve switch (10) is provided on the discharge port (9).

8. The hydrogen fluoride reactor tail gas absorption device according to claim 1, characterized in that: A sealing cover (12) is arranged on the top of the exhaust gas treatment box (1), and an exhaust pipe (13) is arranged at the center of the sealing cover (12).

9. The hydrogen fluoride reactor tail gas absorption device according to claim 1, characterized in that: A feed pipe (11) is provided at the upper end of the side wall of the tail gas treatment box (1).

10. The tail gas absorption device for a hydrogen fluoride reactor according to claim 1, characterized in that: A U-shaped support frame (14) is provided between the two sides of the exhaust gas intake pipe (2) outside the two ends of the U-shaped connecting pipe (3).

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