Negative pressure control system and method for Mannheim furnace reaction chamber

Abstract

The present invention discloses a negative pressure control system and method for a Mannheim furnace reaction chamber, which relates to the field of negative pressure control technology, and includes a furnace body, a purification mechanism and a suction mechanism. The HCL gas generated by the reaction inside the furnace body is sucked by the suction mechanism through the purification mechanism, and the purification mechanism purifies the HCL gas; a through hole is provided on the top of the furnace body, a rotating tube is rotatably connected inside the through hole, a support box is fixedly connected to the bottom end of the rotating tube, and the support box is connected to the rotating tube, a through groove is provided on the lower surface of the support box, a filter is fixedly connected inside the through groove, and a scraper for pushing and scraping the lower surface of the filter is provided inside the furnace body. The negative pressure control system for the Mannheim furnace reaction chamber prevents potassium sulfate from being sucked out by providing structures such as a support box, a filter, and a scraper, while ensuring that the gas inside the furnace body is evenly discharged, and can prevent the filter from being blocked.

Description

Technical Field

[0001] The present invention relates to the technical field of negative pressure control, and in particular to a negative pressure control system and method for a Mannheim furnace reaction chamber. Background Art

[0002] The Mannheim furnace reaction process produces HCL gas as a by-product. Once it overflows, it will cause corrosion to the plant equipment, so the reaction chamber must be maintained in a negative pressure state.

[0003] In actual production, potassium chloride and sulfuric acid are added to a Mannheim furnace in a certain ratio to react and produce potassium sulfate and HCl gas. Existing technology typically uses direct extraction of the HCl gas to maintain a negative pressure inside the Mannheim furnace. However, due to the lack of a filtration mechanism, a small amount of potassium sulfate is sucked out during the extraction process, resulting in a waste of resources.

[0004] Therefore, it is necessary to propose a negative pressure control system and method for the Mannheim furnace reaction chamber to solve the above problems. Summary of the Invention

[0005] The present invention aims to provide a negative pressure control system and method for a Mannheim furnace reaction chamber, so as to solve the problem in the prior art that a negative pressure state is maintained in the Mannheim furnace by directly sucking HCl gas. Due to the lack of a filtering mechanism, a small amount of potassium sulfate is sucked out during the suction process, resulting in a waste of resources.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a negative pressure control system for a Mannheim furnace reaction chamber, comprising a furnace body, a purification mechanism, and a suction mechanism, wherein the HCl gas generated by the reaction inside the furnace body is sucked through the purification mechanism by the suction mechanism, and the purification mechanism purifies the HCl gas;

[0007] A through hole is provided on the top of the furnace body, a rotating tube is rotatably connected inside the through hole, a support box is fixedly connected to the bottom end of the rotating tube, and the support box is communicated with the rotating tube, a through groove is provided on the lower surface of the support box, a filter is fixedly connected inside the through groove, and a scraper for pushing and scraping the lower surface of the filter is provided inside the furnace body.

[0008] Preferably, the support boxes are provided in plurality, and the plurality of support boxes are evenly distributed around the axis of the furnace body.

[0009] Preferably, the scraper is provided in plurality, and the plurality of scrapers are evenly distributed around the axis of the furnace body.

[0010] Preferably, the scraper is rotatably connected to a rotating shaft, and the end of the rotating shaft away from the scraper is fixedly connected to a support block, and the support block is fixedly connected to the wall of the furnace body, and the bottom of the support box is fixedly connected to a vertical rod that cooperates with the scraper. A circular groove is provided on the side of the support block close to the scraper, and the circular groove surrounds the outside of the rotating shaft. A torsion spring is provided inside the circular groove, and the torsion spring is sleeved on the outside of the rotating shaft. One end of the torsion spring is fixedly connected to the scraper, and the other end of the torsion spring is fixedly connected to the rotating shaft.

[0011] Preferably, an arc-shaped cutout is provided at one end of the scraper close to the support block, and the arc-shaped cutout is located on one side of the scraper.

[0012] Preferably, a driving assembly for driving the rotating tube is provided on the top of the furnace body, and the driving assembly includes a motor, a first gear and a second gear. The motor is fixedly connected to the upper surface of the top of the furnace body, the first gear is fixedly connected to the driving shaft of the motor, the second gear is fixedly connected to the rotating tube, and the first gear and the second gear are meshed and connected.

[0013] Preferably, the top end of the rotating tube is connected to a rotary joint, and the top of the rotary joint is connected to a conveying pipeline.

[0014] Preferably, the purification mechanism includes a cooling tower, a first washing tower, an absorption tower, a second washing tower and a purification tower arranged in sequence, the end of the conveying pipeline away from the rotary joint is connected to the cooling tower, and a first regulating valve is provided between the cooling tower and the first washing tower.

[0015] Preferably, the suction mechanism includes a fan, which is connected to the purification tower, and a second regulating valve is provided between the fan and the purification tower. A pressure sensor is installed on the furnace body, and a controller is fixedly installed on the outer wall of the furnace body, and the controller cooperates with the pressure sensor.

[0016] The present invention also discloses a negative pressure control method for a Mannheim furnace reaction chamber, which is applied to the negative pressure control system of the Mannheim furnace reaction chamber, and further includes the following operating steps:

[0017] S1. Suction: The suction mechanism sucks the HCl gas inside the furnace body through the purification mechanism, and the purification mechanism purifies the HCl gas;

[0018] S2. Filtration: The filter screen filters out potassium sulfate, and the scraper is attached to the lower surface of the filter screen for pushing and scraping;

[0019] S3. Self-cleaning: The scraper vibrates to shake off the residue.

[0020] Technical effects and advantages of the present invention:

[0021] 1. The present invention prevents potassium sulfate from being sucked out by providing a support box, a filter screen, a scraper and other structures, while ensuring that the gas inside the furnace is evenly discharged and preventing the filter screen from being blocked;

[0022] 2. When the HCL gas is being extracted, the rotating tube drives the support box to rotate, so that the through slot and filter screen rotate synchronously, expanding the coverage area. Compared with being fixed in a certain position, the gas inside the furnace can be discharged evenly.

[0023] 3. After the negative pressure is sucked out, the support box fits on the top of the corresponding scraper, thereby completing the closure of the through slot and realizing the partition function, preventing the escape of HCL gas and improving the accuracy of air pressure monitoring;

[0024] 4. The scraper is attached to the lower surface of the filter and pushes and scrapes it. Then the vertical rod contacts the side wall of the scraper, causing the scraper to swing counterclockwise. The vertical rod is attached to the scraping edge of the scraper and slides and scrapes to clean the residue. When the vertical rod is staggered with the scraper, the reset force of the torsion spring causes the scraper to quickly reset and vibrate, thereby shaking off the remaining residue and completing the effect of cleaning the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the negative pressure control system of the Mannheim furnace reaction chamber of the present invention.

[0026] Figure 2 It is a schematic diagram of the furnace structure of the present invention.

[0027] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure in the middle.

[0028] Figure 4 It is a schematic diagram of the support box and scraper structure of the present invention.

[0029] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at point B in the middle.

[0030] Figure 6 This is a schematic diagram of the through groove and filter structure of the present invention.

[0031] Figure 7 It is a schematic diagram of the scraper and arc-shaped incision structure of the present invention.

[0032] Figure 8 It is a schematic diagram of the rotating shaft and circular groove structure of the present invention.

[0033] In the figure: 1. furnace body; 2. purification mechanism; 3. cooling tower; 4. first washing tower; 5. absorption tower; 6. second washing tower; 7. purification tower; 8. first regulating valve; 9. second regulating valve; 10. fan; 11. conveying pipe; 12. through hole; 13. rotating pipe; 14. motor; 15. first gear; 16. second gear; 17. support box; 18. through groove; 19. filter screen; 20. support block; 21. scraper; 22. rotating shaft; 23. circular groove; 24. torsion spring; 25. arc-shaped incision; 26. vertical rod; 27. pressure sensor; 28. controller; 29. ​​rotary joint. DETAILED DESCRIPTION

[0034] The present invention provides Figures 1 to 8 The negative pressure control system of the Mannheim furnace reaction chamber shown includes a furnace body 1, a purification mechanism 2, and a suction mechanism. In actual use, potassium chloride and sulfuric acid are added to the furnace body 1 in a certain proportion to react to generate potassium sulfate and HCl gas. The suction mechanism sucks the HCl gas inside the furnace body 1 through the purification mechanism 2, and the purification mechanism 2 purifies the HCl gas.

[0035] Taking into account that in order to prevent potassium sulfate from being sucked out when the HCl gas is sucked out, a through hole 12 is opened on the top of the furnace body 1. A rotating tube 13 is rotatably connected to the inside of the through hole 12. A support box 17 is fixedly connected to the bottom end of the rotating tube 13. A plurality of support boxes 17 are provided, and the plurality of support boxes 17 are evenly distributed around the axis of the furnace body 1. The support boxes 17 are connected to the rotating tube 13, and the rotating tube 13 drives the support boxes 17 to rotate.

[0036] A through groove 18 is formed on the lower surface of the support box 17 , and a filter 19 is fixedly connected to the interior of the through groove 18 . The filter 19 is used to filter out potassium sulfate to prevent the potassium sulfate from being sucked out.

[0037] When the HCl gas is sucked, the rotating tube 13 drives the support box 17 to rotate, so that the through groove 18 and the filter screen 19 rotate synchronously, thereby expanding the coverage area. Compared with being fixed in a certain position, the gas inside the furnace body 1 can be discharged evenly.

[0038] The top of the furnace body 1 is equipped with a drive assembly that drives the rotating tube 13. The drive assembly includes a motor 14, a first gear 15, and a second gear 16. The motor 14 is fixedly connected to the upper surface of the top of the furnace body 1. The first gear 15 is fixedly connected to the drive shaft of the motor 14. The second gear 16 is fixedly connected to the rotating tube 13. The first gear 15 and the second gear 16 are meshed. The motor 14 drives the first gear 15 to rotate. Due to the meshing connection between the first gear 15 and the second gear 16, the second gear 16 drives the rotating tube 13 to rotate.

[0039] During actual use, the HCL gas in the furnace body 1 is sucked out through the rotating tube 13 and the support box 17, and the filter 19 filters out potassium sulfate to prevent the potassium sulfate from being sucked out; at the same time, the motor 14 drives the first gear 15 to rotate. Since the first gear 15 and the second gear 16 are engaged and connected, the second gear 16 drives the rotating tube 13 to rotate, and the rotating tube 13 drives the support box 17 to rotate, so that the through groove 18 and the filter 19 rotate synchronously, thereby expanding the coverage area and ensuring that the gas inside the furnace body 1 is evenly discharged.

[0040] Taking into account that potassium sulfate is easily accumulated on the lower surface of the filter 19 due to suction, in order to avoid clogging of the filter 19, a scraper 21 for pushing and scraping the lower surface of the filter 19 is provided inside the furnace body 1. The scraper 21 is provided in plurality, and the plurality of scrapers 21 are evenly distributed around the axis of the furnace body 1, and the number of the scrapers 21 is consistent with the number of the support boxes 17.

[0041] When the rotating tube 13 drives the support box 17 to rotate, the through groove 18 and the filter screen 19 rotate synchronously. When the filter screen 19 contacts the scraper 21, the scraper 21 is attached to the lower surface of the filter screen 19 to push and scrape, causing the potassium sulfate to fall and avoid blockage.

[0042] By providing structures such as the support box 17 , the filter 19 , and the scraper 21 , potassium sulfate is prevented from being sucked out, while ensuring that the gas inside the furnace body 1 is evenly discharged and preventing the filter 19 from being blocked.

[0043] In addition, after the negative pressure is sucked, the motor 14 drives the first gear 15 to rotate. Since the first gear 15 and the second gear 16 are meshed and connected, the second gear 16 drives the rotating tube 13 to rotate, and the rotating tube 13 drives the support box 17 to rotate, so that the support box 17 fits the top of the corresponding scraper 21, thereby completing the closure of the through groove 18, realizing the partition function, preventing the escape of HCL gas, and improving the accuracy of air pressure monitoring.

[0044] Taking into account that after the filter 19 is pushed and scraped, residue is likely to appear on the scraper 21, in order to prevent residue from appearing on the scraper 21, a rotating shaft 22 is rotatably connected to the scraper 21, and the end of the rotating shaft 22 away from the scraper 21 is fixedly connected to a support block 20, and the support block 20 is fixedly connected to the inner wall of the furnace body 1. The bottom of the support box 17 is fixedly connected to a vertical rod 26 that cooperates with the scraper 21. A circular groove 23 is provided on the side of the support block 20 close to the scraper 21. The circular groove 23 surrounds the outside of the rotating shaft 22, and a torsion spring 24 is provided inside the circular groove 23. The torsion spring 24 is sleeved on the outside of the rotating shaft 22, one end of the torsion spring 24 is fixedly connected to the scraper 21, and the other end of the torsion spring 24 is fixedly connected to the rotating shaft 22.

[0045] An arc-shaped cutout 25 is formed at one end of the scraper 21 close to the support block 20 , and the arc-shaped cutout 25 is located on one side of the scraper 21 .

[0046] Reference Figure 7 , the support box 17 rotates clockwise, the scraper 21 is fitted against the lower surface of the filter screen 19 for pushing and scraping, and then the vertical rod 26 contacts the side wall of the scraper 21, causing the scraper 21 to swing counterclockwise, and the vertical rod 26 is fitted against the scraping edge of the scraper 21 and slides to scrape to clean the residue; when the vertical rod 26 is staggered with the scraper 21, the reset force of the torsion spring 24 causes the scraper 21 to quickly reset and vibrate, thereby shaking off the remaining residue and completing the effect of cleaning the scraper 21.

[0047] In addition, since the vertical rod 26 may come into contact with the residue, even if there is a small amount of residue on the vertical rod 26 , it will fall off during the subsequent rotation process.

[0048] The top end of the rotating tube 13 is connected to a rotating joint 29 , and the top of the rotating joint 29 is connected to the conveying pipeline 11 . The provision of the rotating joint 29 does not affect the rotation of the rotating tube 13 .

[0049] Specifically, the purification mechanism 2 includes a cooling tower 3, a first scrubber 4, an absorption tower 5, a second scrubber 6, and a purification tower 7, which are arranged in sequence. The end of the delivery pipe 11 away from the rotary joint 29 is connected to the cooling tower 3. A first regulating valve 8 is provided between the cooling tower 3 and the first scrubber 4. By providing the purification mechanism 2, the sucked HCl gas is purified. The first scrubber 4 and the second scrubber 6 are provided to perform a double scrubbing process, thereby improving the purification effect. The purification mechanism 2 and its working principle are conventional technologies and will not be described in detail here.

[0050] In a specific configuration, the suction mechanism includes a fan 10, which is connected to the purification tower 7, and a second regulating valve 9 is provided between the fan 10 and the purification tower 7. The air outlet of the fan 10 is connected to the air treatment duct of the factory, and the HCl gas is sucked by the suction force generated by the fan 10.

[0051] A pressure sensor 27 is installed on the furnace body 1 to monitor the pressure inside the furnace body 1 . A controller 28 is fixedly installed on the outer wall of the furnace body 1 , and the controller 28 cooperates with the pressure sensor 27 .

[0052] Specifically, the controller 28 is used to connect between the first regulating valve 8, the second regulating valve 9, the motor 14 and the pressure sensor 27. When the pressure sensor 27 detects that the internal pressure of the furnace body 1 exceeds the set threshold, it transmits this information to the controller 28. The controller 28 controls the first regulating valve 8 and the second regulating valve 9 to open, and starts the motor 14. The controller 28 and its control principle are existing common technologies and will not be elaborated here.

[0053] The present invention also provides a negative pressure control method for a Mannheim furnace reaction chamber, which is applied to the negative pressure control system of the Mannheim furnace reaction chamber, and further includes the following steps:

[0054] S1. Suction: The suction mechanism sucks the HCl gas inside the furnace body 1 through the purification mechanism 2, and the purification mechanism 2 purifies the HCl gas;

[0055] S2, filtration: The filter 19 filters out potassium sulfate, and the scraper 21 is attached to the lower surface of the filter 19 to push and scrape;

[0056] S3, self-cleaning: the scraper 21 vibrates to shake off the residue.

[0057] Working principle: Potassium chloride and sulfuric acid are added into the furnace body 1 in a certain proportion to react and generate potassium sulfate and HCl gas. The suction mechanism sucks the HCl gas inside the furnace body 1 through the purification mechanism 2, and the purification mechanism 2 purifies the HCl gas.

[0058] The HCl gas in the furnace body 1 is sucked out through the rotating tube 13 and the support box 17, and the filter 19 filters out potassium sulfate to prevent it from being sucked out; at the same time, the motor 14 drives the first gear 15 to rotate. Since the first gear 15 and the second gear 16 are engaged, the second gear 16 drives the rotating tube 13 to rotate, and the rotating tube 13 drives the support box 17 to rotate, so that the through groove 18 and the filter 19 rotate synchronously, thereby expanding the coverage area and ensuring that the gas inside the furnace body 1 is evenly discharged.

[0059] When the rotating tube 13 drives the support box 17 to rotate, the through groove 18 and the filter screen 19 rotate synchronously. When the filter screen 19 contacts the scraper 21, the scraper 21 is attached to the lower surface of the filter screen 19 to push and scrape, causing the potassium sulfate to fall and avoid blockage.

Claims

1. A negative pressure control system for a reaction chamber of a Mannheim furnace, comprising a furnace body (1), a purification mechanism (2) and a suction mechanism, characterized in that: The HCL gas generated by the reaction inside the furnace body (1) is sucked by the suction mechanism through the purification mechanism (2), and the purification mechanism (2) purifies the HCL gas; The furnace body (1) is provided with a through hole (12) at the top, a rotating tube (13) is rotatably connected inside the through hole (12), a support box (17) is fixedly connected to the bottom end of the rotating tube (13), and the support box (17) is communicated with the rotating tube (13), a through groove (18) is provided on the lower surface of the support box (17), a filter screen (19) is fixedly connected inside the through groove (18), and a scraper (21) for pushing and scraping the lower surface of the filter screen (19) is arranged inside the furnace body (1).

2. The negative pressure control system for the reaction chamber of the Mannheim furnace according to claim 1, characterized in that: The support boxes (17) are arranged in plurality, and the plurality of support boxes (17) are evenly distributed around the axis of the furnace body (1).

3. The negative pressure control system for the reaction chamber of the Mannheim furnace according to claim 1, characterized in that: The scraper (21) is provided in plurality, and the plurality of scrapers (21) are evenly distributed around the axis of the furnace body (1).

4. The negative pressure control system for the reaction chamber of a Mannheim furnace according to claim 1, characterized in that: The scraper (21) is rotatably connected to a rotating shaft (22); one end of the rotating shaft (22) away from the scraper (21) is fixedly connected to a support block (20); the support block (20) is fixedly connected to the inner wall of the furnace body (1); the bottom of the support box (17) is fixedly connected to a vertical rod (26) matched with the scraper (21); a circular groove (23) is provided on a side of the support block (20) close to the scraper (21); the circular groove (23) surrounds the outer side of the rotating shaft (22); a torsion spring (24) is arranged inside the circular groove (23); the torsion spring (24) is sleeved on the outside of the rotating shaft (22); one end of the torsion spring (24) is fixedly connected to the scraper (21); and the other end of the torsion spring (24) is fixedly connected to the rotating shaft (22).

5. The negative pressure control system for the reaction chamber of the Mannheim furnace according to claim 4, characterized in that: An arc-shaped cutout (25) is provided at one end of the scraper (21) close to the support block (20), and the arc-shaped cutout (25) is located on one side of the scraper (21).

6. The negative pressure control system for the reaction chamber of a Mannheim furnace according to claim 1, characterized in that: A driving assembly for driving the rotating tube (13) to rotate is arranged on the top of the furnace body (1), and the driving assembly comprises a motor (14), a first gear (15) and a second gear (16); the motor (14) is fixedly connected to the upper surface of the top of the furnace body (1); the first gear (15) is fixedly connected to the driving shaft of the motor (14); the second gear (16) is fixedly connected to the rotating tube (13); and the first gear (15) and the second gear (16) are meshingly connected.

7. The negative pressure control system for the reaction chamber of a Mannheim furnace according to claim 1, characterized in that: The top end of the rotating tube (13) is connected to a rotating joint (29), and the top of the rotating joint (29) is connected to a conveying pipeline (11).

8. The negative pressure control system for the reaction chamber of the Mannheim furnace according to claim 7, characterized in that: The purification mechanism (2) comprises a cooling tower (3), a first washing tower (4), an absorption tower (5), a second washing tower (6) and a purification tower (7) which are arranged in sequence; an end of the conveying pipeline (11) away from the rotary joint (29) is connected to the cooling tower (3); and a first regulating valve (8) is arranged between the cooling tower (3) and the first washing tower (4).

9. The negative pressure control system for the reaction chamber of a Mannheim furnace according to claim 8, characterized in that: The suction mechanism comprises a fan (10), the fan (10) is connected to a purification tower (7), a second regulating valve (9) is arranged between the fan (10) and the purification tower (7), a pressure sensor (27) is installed on the furnace body (1), and a controller (28) is fixedly installed on the outer wall of the furnace body (1), and the controller (28) cooperates with the pressure sensor (27).

10. A negative pressure control method for a Mannheim furnace reaction chamber, characterized in that: The negative pressure control system for the reaction chamber of the Mannheim furnace as claimed in any one of claims 1 to 9 further comprises the following operating steps: S1. Suction: The suction mechanism sucks the HCL gas inside the furnace body (1) through the purification mechanism (2), and the purification mechanism (2) purifies the HCL gas; S2, filtering: The filter screen (19) filters out potassium sulfate, and the scraper (21) is attached to the lower surface of the filter screen (19) for pushing and scraping; S3, self-cleaning: the scraper (21) vibrates to shake off the residue.

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