Dilute sulfuric acid waste gas treatment device
By using regulating components and pressure relief pipe structures in the dilute sulfuric acid waste gas treatment device, the problems of increased pressure inside the reactor and large footprint were solved, achieving flexible installation and safe and stable treatment of dilute sulfuric acid waste gas.
Patent Information
- Application Number
- CN202520216322.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-12
AI Technical Summary
Existing dilute sulfuric acid waste gas treatment devices involve a violent reaction between ammonia and dilute sulfuric acid in the reactor, which leads to a rapid increase in pressure inside the reactor and may cause ammonia backflow. In addition, they occupy a large area and are subject to space constraints.
The adjustment assembly includes a connecting rod and an adjustment plate. The adjustment plate slides along the axis of the connecting rod to change the size of the reaction space. Combined with the pressure relief pipe and sealing structure, the pressure inside the reactor is adjusted to avoid backflow and reduce the equipment footprint.
It effectively regulates the pressure inside the reactor, prevents ammonia backflow, reduces equipment footprint, improves installation flexibility, reduces pressure peaks, and ensures safe and stable operation.
Smart Images
Figure CN223760759U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of waste gas treatment, and in particular to a dilute sulfuric acid waste gas treatment device. Background Technology
[0002] Waste gas containing dilute sulfuric acid is usually generated during the production of sulfuric acid, metal smelting, and petroleum refining. If the waste gas is directly discharged, it will easily cause environmental pollution. Therefore, this part of the tail gas usually needs to be treated in a reaction vessel to reduce environmental pollution.
[0003] In existing technologies, ammonia water is used to neutralize waste gas containing dilute sulfuric acid in a reaction vessel to achieve harmless treatment of the waste gas containing dilute sulfuric acid. However, during the treatment process, the reaction between ammonia water and dilute sulfuric acid is violent, and the ammonia gas produced during the reaction causes the pressure inside the reaction vessel to increase rapidly, which may lead to ammonia water backflow. Therefore, an anti-backflow tank connected to the reaction vessel is usually installed next to the reaction vessel to solve the problem of ammonia water backflow.
[0004] However, setting up a separate anti-backflow tank next to the reactor will result in a larger footprint for the entire dilute sulfuric acid waste gas treatment equipment, making its construction and installation subject to space constraints. Utility Model Content
[0005] To ensure that the dilute sulfuric acid waste gas treatment device is not easily affected by the installation space, this application provides a dilute sulfuric acid waste gas treatment device, which adopts the following technical solution:
[0006] The reactor includes a reaction vessel and a feed pipe. The reaction vessel is equipped with an adjustment assembly for adjusting the volume of the reaction vessel. The adjustment assembly includes a connecting rod and an adjustment plate. One end of the connecting rod is connected to the inside of the reaction vessel, and the other end of the connecting rod passes vertically through the adjustment plate. The adjustment plate divides the space inside the reaction vessel into an adjustment space and a reaction space distributed vertically. The adjustment plate can slide along the axis of the connecting rod to change the size of the adjustment space and the reaction space. The feed pipe is connected to the reaction space. The reaction vessel is equipped with a discharge pipe that is connected to the adjustment space.
[0007] Preferably, the adjusting plate is provided with a through hole for the connecting rod to pass through, and the inner wall of the through hole is provided with a first sealing groove, and a first sealing ring is embedded in the first sealing groove.
[0008] Preferably, the regulating plate is provided with a pressure relief hole, and a movable plate that can only be opened toward the regulating space is provided on the regulating plate at the position corresponding to the pressure relief hole. A pressure relief pipe that communicates with the outside is provided in the reactor at the position corresponding to the pressure relief hole, and the end of the pressure relief pipe can pass through the pressure relief hole and communicate with the reaction space.
[0009] Preferably, a second sealing groove is provided on the side of the adjusting plate near the reaction space, and a second sealing ring is provided on the movable plate. When the movable plate covers the pressure relief hole, the second sealing ring is located in the second sealing groove.
[0010] Preferably, the portion of the pressure relief pipe located within the adjustment space is provided with an installation part, a spring is provided on the installation part, the spring is sleeved on the pressure relief pipe, and an abutment block is provided at the end of the spring away from the installation part, the abutment block is sleeved on the pressure relief pipe, and a third sealing ring is provided on the abutment block that can abut against the adjustment plate.
[0011] Preferably, a fourth sealing ring is provided on the abutment block, and the fourth sealing ring is sleeved on the outer wall of the pressure relief pipe and abuts against the outer wall of the pressure relief pipe.
[0012] Preferably, the end of the feed pipe near the reactor is provided with a bend, one end of which is connected to the reaction space, and the horizontal height of the end of the bend near the reactor is lower than that of the end of the bend near the feed pipe.
[0013] In summary, compared with the prior art, the advantages of this application are as follows:
[0014] 1. By setting up an adjustment component that allows for adjustment of the reaction space size, even when waste gas containing dilute sulfuric acid is introduced into the adjustment space of the reactor, the pressure in the reaction space gradually increases as ammonia is continuously generated. This pushes the adjustment plate to move along the axis of the connecting rod. During this process, the volume of the reaction space increases, which prevents the liquid in the reaction space from easily flowing back into the feed channel due to the high pressure in the reaction space. Compared with the existing technology, there is no need to set up an anti-backflow tank next to the reactor, which has the advantages of less space restriction and flexible installation.
[0015] 2. By setting up a pressure relief pipe, after the adjusting plate rises a certain distance along the length of the connecting rod, the pressure relief pipe can push open the movable plate on the adjusting plate, thereby enabling the pressure relief pipe to communicate with the reaction space. This allows the gas in the reaction space to be discharged through the pressure relief pipe when the volume in the reaction space increases to a certain extent and cannot be increased further, thereby reducing the pressure in the reaction space. Attached Figure Description
[0016] Figure 1 This is a three-dimensional schematic diagram of a dilute sulfuric acid tail gas treatment device according to an embodiment of this application;
[0017] Figure 2 yes Figure 1 Middle left view;
[0018] Figure 3 yes Figure 2 A schematic diagram of the cross-section after cutting along point AA;
[0019] Figure 4 yes Figure 3 Enlarged view of point B in the middle;
[0020] Figure 5 yes Figure 3 Enlarged view of point C in the middle;
[0021] Figure 6 yes Figure 3 Enlarged diagram of point D in the middle.
[0022] Explanation of reference numerals in the attached drawings: 1. Reactor; 2. Feed pipe; 3. Adjustment assembly; 4. Connecting rod; 5. Adjustment plate; 6. Perforation; 7. First sealing groove; 8. First sealing ring; 9. Pressure relief hole; 10. Movable plate; 11. Pressure relief pipe; 12. Second sealing groove; 13. Second sealing ring; 14. Mounting part; 15. Spring; 16. Abutment block; 17. Third sealing ring; 18. Fourth sealing ring; 19. Bend; 20. Discharge pipe; 21. Adjustment space; 22. Reaction space. Detailed Implementation
[0023] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.
[0024] Example
[0025] This application discloses a dilute sulfuric acid waste gas treatment device, referring to... Figure 1 , Figure 2 and Figure 3 The system includes an inlet pipe 2 and a reaction vessel 1. One end of the inlet pipe 2 is connected to the outlet of the dilute sulfuric acid waste gas, while the other end of the inlet pipe 2 is connected to the reaction vessel 1. The reaction vessel 1 contains ammonia water for reacting with the dilute sulfuric acid in the waste gas. The end of the inlet pipe 2 near the reaction vessel is provided with a bend 19. One end of the bend 19 is connected to the reaction vessel 1, and the other end of the bend 19 is connected to the inlet pipe 2. The height of the bend 19 near the inlet pipe 2 is higher than the height of the bend 19 connected to the reaction vessel 1. This not only allows the dilute sulfuric acid waste gas to react with the ammonia water when it is sent into the reaction vessel 1, but also prevents the ammonia water in the reaction vessel 1 from flowing back into the inlet pipe 2.
[0026] In addition, a one-way valve can be installed on the bend 19 to further reduce the probability of ammonia water backflowing into the inlet pipe 2.
[0027] Inside the reactor 1, there is an adjustment assembly 3, which includes a connecting rod 4 and an adjustment plate 5. The adjustment plate 5 has a through hole 6 for the connecting rod 4 to pass through. One end of the connecting rod 4 is fixedly connected to the inner wall of the upper part of the reactor 1, while the other end of the connecting rod 4 passes vertically through the through hole 6 into the adjustment plate 5. The adjustment plate 5 can slide back and forth on the connecting rod 4 along the axis of the connecting rod 4. The outer diameter contour of the adjustment plate 5 is adapted to and fits the inner wall contour of the reactor 1. The adjustment plate 5 is placed horizontally inside the reactor 1, thereby dividing the space inside the reactor 1 into an upper and lower distributed and non-connected adjustment space 21 and a reaction space 22. Dilute sulfuric acid waste gas is sent into the reaction space 22 and the ammonia water in the reaction space 22 through the inlet pipe 2 for reaction.
[0028] When the dilute sulfuric acid waste gas is introduced into the reactor 1 through the bend 19, the dilute sulfuric acid in the waste gas will react with ammonia water to generate a large amount of ammonia gas in a short time. Some of the ammonia gas cannot be discharged in time, which will cause the pressure in the reaction space 22 in the reactor 1 to increase. At this time, the regulating plate 5 will rise along the axis of the connecting rod 4, thereby reducing the regulating space 21 and increasing the reaction space 22, so as to achieve the effect of reducing the pressure in the reaction space 22, so that the ammonia water in the reaction space 22 will not flow back into the feed pipe 2 through the bend 19.
[0029] Correspondingly, a discharge pipe 20 is provided at the position corresponding to the adjustment space 21 on the reactor, so that the adjustment plate can slide smoothly along the length of the connecting rod when the pressure inside the reaction space 22 increases.
[0030] It should be noted that, provided that ammonia gas in the reaction space does not enter the regulating space 21, the end of the discharge pipe 20 away from the regulating space 21 can be directly connected to the external environment.
[0031] Reference Figure 3 and Figure 4 It is worth mentioning that an annular first sealing groove 7 is provided on the inner wall of the perforation 6. The first sealing groove 7 is embedded with a first sealing ring 8. The first sealing ring 8 is used to fill the gap between the connecting rod 4 and the inner wall of the perforation 6 on the adjusting plate 5, so that the ammonia gas generated in the reaction space 22 will not easily escape.
[0032] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6Furthermore, a pressure relief hole 9 is provided on the regulating plate 5. On the side of the regulating plate 5 within the reaction space 22, a movable plate 10 is provided to cover the pressure relief hole 9. The movable plate 10 can only rotate towards the reaction space 22 on the regulating plate 5. A pressure relief pipe 11 is provided within the regulating space 21 at the position corresponding to the pressure relief hole 9. One end of the pressure relief pipe 11 is connected to an external container for collecting ammonia gas, and the other end of the pressure relief pipe 11 is directly above the pressure relief hole 9. This allows the regulating plate 5 to rise on the connecting rod 4 when the pressure in the reaction space 22 is high enough. At a certain height, the end of the pressure relief pipe 11 near the regulating plate 5 can abut against the movable plate 10 and push the movable plate 10 open, thereby connecting the end of the pressure relief pipe 11 with the reaction space 22. This allows excess ammonia gas in the reaction space 22 to be discharged from the pressure relief pipe 11, thus achieving the effect of reducing the pressure in the reaction space 22 when the regulating plate 5 no longer has the ability to regulate the pressure in the reaction space 22. This also ensures that even if the gas outlet on the reactor 1 malfunctions and cannot discharge, the pressure in the reactor 1 will not become too high.
[0033] It should be noted that a second sealing groove 12 is provided on the side of the adjusting plate 5 within the reaction space 22 corresponding to the pressure relief hole 9, while a second sealing ring 13 is installed on the movable plate 10. The movable plate 10 is hinged to the adjusting plate 5 by a torsion spring. When the movable plate 10 covers the pressure relief hole 9, the second sealing ring is embedded in the second sealing groove 12, thereby achieving a seal between the movable plate 10 and the adjusting plate 5.
[0034] Furthermore, a mounting part 14 is provided in the part of the pressure relief pipe 11 located within the adjustment space 21, and a spring 15 is also provided on the mounting part 14. The spring 15 is sleeved on the pressure relief pipe 11, and a suspended abutment block 16 is provided at the end of the spring 15 away from the mounting part 14. When the adjustment plate 5 rises until the pressure relief pipe 11 abuts against the movable plate 10 and pushes the movable plate 10 away from the adjustment plate 5, the abutment block 16 can abut against the adjustment plate 5, thereby restricting the movement of the adjustment plate 5. This prevents the adjustment plate 5 from easily colliding with the inner wall of the top of the reactor 1.
[0035] It should be noted that a third sealing ring 17 is provided at the end of the abutment block 16 near the adjusting plate 5. This prevents ammonia gas in the reaction space 22 from easily flowing out from the gap between the abutment block 16 and the adjusting plate 5 when the adjusting plate 5 and the abutment block 16 are pressed together. A fourth sealing ring 18 is provided on the inner wall of the abutment block 16. The fourth sealing ring 18 is used to fill the gap between the outer wall of the pressure relief pipe 11 and the inner wall of the abutment block 16. This prevents ammonia gas from flowing out from the gap between the pressure relief pipe 11 and the abutment block 16 after the end of the pressure relief pipe 11 passes through the pressure relief hole 9.
[0036] The implementation principle of this application embodiment is as follows: Waste gas containing dilute sulfuric acid is transported to the reaction space 22 of the reactor 1 through the inlet pipe 2. As the dilute sulfuric acid in the waste gas reacts violently with the ammonia in the reactor 1, the ammonia that is not discharged in time increases the pressure inside the reactor 1, thereby pushing the regulating plate 5 to slide along the length of the connecting rod 4. This increases the volume of the reaction space 22 and decreases the volume of the regulating space 21, thereby reducing the probability of ammonia backflow due to excessive pressure in the reaction space 22. When the regulating plate 5 rises to abut against the abutting block 16, the end of the pressure relief pipe 11 passes through the pressure relief hole 9 and pushes open the movable plate 10 located on the regulating plate 5. This allows the interior of the reaction space 22 to communicate with the outside, thereby discharging the excess ammonia in the reaction space 22 into the container originally used to collect ammonia. As the ammonia is discharged, the pressure inside the reaction space 22 gradually returns to normal. At this time, the regulating plate 5 gradually descends, and the movable plate 10 resets, thereby resealing the pressure relief hole 9.
[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A dilute sulfuric acid waste gas treatment device comprising a reactor (1) and a feed pipe (2), characterized in that: The reaction kettle (1) is provided with an adjusting assembly (3) for adjusting the volume of the reaction kettle (1), the adjusting assembly (3) comprises a connecting rod (4) and an adjusting plate (5), one end of the connecting rod (4) is connected with the inside of the reaction kettle (1), the other end of the connecting rod (4) is vertically arranged in the adjusting plate (5), the adjusting plate (5) divides the space in the reaction kettle (1) into an adjusting space (21) and a reaction space (22) which are distributed in upper and lower positions, the adjusting plate (5) can slide along the axis of the connecting rod (4) to change the size of the adjusting space (21) and the reaction space (22), the feeding pipe (2) is communicated with the reaction space (22); the reaction kettle is provided with a discharge pipe (20) which is communicated with the adjusting space (21).
2. A dilute sulphuric acid off-gas treatment apparatus according to claim 1, characterised in that: The adjusting plate (5) is provided with a through hole (6) for the connecting rod (4) to pass through, the inner wall of the through hole (6) is provided with a first sealing groove (7), and the first sealing groove (7) is embedded with a first sealing ring (8).
3. A dilute sulphuric acid off-gas treatment apparatus according to claim 1, characterised in that: The adjusting plate (5) is provided with a pressure relief hole (9), the adjusting plate (5) is provided with a movable plate (10) which can only be opened towards the adjusting space (21) at a position corresponding to the pressure relief hole (9), the reaction kettle (1) is provided with a pressure relief pipe (11) which is communicated with the outside at a position corresponding to the pressure relief hole (9), and the end of the pressure relief pipe (11) can pass through the pressure relief hole (9) and be communicated with the reaction space (22).
4. The dilute sulfuric acid off-gas treatment device according to claim 3, characterized in that The side of the adjusting plate (5) close to the reaction space (22) is provided with a second sealing groove (12), the movable plate (10) is provided with a second sealing ring (13), when the movable plate (10) covers the pressure relief hole (9), the second sealing ring (13) is located in the second sealing groove (12).
5. The dilute sulphuric acid off-gas treatment apparatus according to claim 3, characterized in that: The part of the pressure relief pipe (11) located in the adjusting space (21) is provided with a mounting portion (14), the mounting portion (14) is provided with a spring (15), the spring (15) is sleeved on the pressure relief pipe (11), one end of the spring (15) away from the mounting portion (14) is provided with an abutting block (16) for abutting with the adjusting plate (5), the abutting block (16) is sleeved on the pressure relief pipe (11), and the abutting block (16) is provided with a third sealing ring (17) which can abut with the adjusting plate (5).
6. A dilute sulphuric acid off-gas treatment apparatus according to claim 5, characterised in that: The abutting block (16) is provided with a fourth sealing ring (18), the fourth sealing ring (18) is sleeved on the outer wall of the pressure relief pipe (11) and abuts with the outer wall of the pressure relief pipe (11).
7. A dilute sulphuric acid off-gas treatment apparatus according to claim 1, characterized in that: One end of the feeding pipe (2) close to the reaction kettle (1) is provided with a bending portion (19), one end of the bending portion (19) is communicated with the reaction space (22), and the horizontal height of the end of the bending portion (19) close to the reaction kettle (1) is lower than that of the end of the bending portion (19) close to the feeding pipe (2).