A tail gas purification device for sodium metabisulfite production
By introducing a differential pressure velocimeter and a sealed airbag into the tail gas purification equipment for sodium metabisulfite production, adaptive adjustment and uniform distribution of tail gas can be achieved. Combined with a multi-pipe diversion atomizing spray design, the problem of uneven tail gas distribution is solved, the purification effect and equipment automation are improved, and the use of purification liquid is saved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- KAYON CHEM CO LTD
- Filing Date
- 2026-05-12
- Publication Date
- 2026-06-19
AI Technical Summary
The uneven distribution of exhaust gas in the purification equipment during the sodium metabisulfite production process leads to poor purification effect, and the spray system cannot be adaptively adjusted, which easily causes waste or incomplete purification liquid.
The system employs a spray purification mechanism, combined with a differential pressure velocimeter and a sealed airbag, to monitor the exhaust gas velocity in real time and adaptively adjust the number of air outlets and spray heads to ensure uniform distribution of exhaust gas. At the same time, the system increases the contact area between the purification liquid and the exhaust gas through a multi-pipe diversion and atomized spray design, and uses elastic components to achieve automatic discharge of waste liquid.
It achieves stable and uniform distribution of exhaust gas and efficient purification, reduces waste of purification liquid, improves purification effect, enhances equipment automation, and reduces labor costs.
Smart Images
Figure CN122230504A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of exhaust gas purification technology, and specifically to an exhaust gas purification device for sodium metabisulfite production. Background Technology
[0002] Sodium metabisulfite, as an important chemical raw material, is widely used in food processing, pharmaceutical manufacturing, printing and dyeing and other industries. During its production process, exhaust gas containing sulfur dioxide, dust and other harmful impurities is generated. If it is directly emitted, it will cause serious environmental pollution and harm human health. Therefore, the exhaust gas must be treated by special purification equipment before it is emitted.
[0003] In real-world applications, most devices use pipes to directly deliver exhaust gas into the device, causing the exhaust gas to accumulate at the inlet. Due to fluctuations in exhaust gas flow rate, the gas is unevenly distributed within the purification equipment, resulting in excessively high exhaust gas concentrations in some areas, which affects the purification effect. In other words, the device has poor stability in exhaust gas introduction, and the spraying system is mostly in a fixed mode, unable to adaptively adjust the spraying range and purification liquid volume according to the exhaust gas volume, which can easily lead to waste of purification liquid or incomplete purification. Summary of the Invention
[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a tail gas purification device for sodium metabisulfite production, which effectively solves the problem of uneven tail gas distribution within the device in existing technologies.
[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a tail gas purification device for sodium metabisulfite production, comprising: a spray purification mechanism, wherein the spray purification mechanism is provided with a tail gas emission mechanism; The spray purification mechanism includes a sealed tank. A packing assembly frame is fixed in the middle of the inner cavity of the sealed tank. A pumping mechanism is fixed on the outer surface of the sealed tank. A sealing plate is fixed inside the sealed tank above the packing assembly frame. Multiple arc-shaped grooves are arrayed on the upper end of the sealing plate. A discharge pipe embedded inside the sealed tank is located above the sealing plate and extends to the outside of the sealed tank. A spray frame assembly is located between the packing assembly frame and the sealing plate. A conical collecting cylinder is fixed inside the sealed tank below the packing assembly frame. A liquid outlet pipe is fixed at the lower end of the conical collecting cylinder and extends to the outside of the sealed tank. An elastic element is fixedly connected inside the spray purification mechanism. A conical block is fixed at the upper end of the elastic element.
[0006] Preferably, in the initial state, the conical block fits against the inner wall of the liquid outlet pipe.
[0007] Preferably, the spray frame assembly includes a first spray pipe fixed to the lower end of the sealing plate, and a second spray pipe and a third spray pipe fixed to the lower end of the sealing plate. A connecting pipe is fixedly connected to each of the first, second, and third spray pipes. One of the connecting pipes is connected to the pumping mechanism via a pipeline. A sealing airbag is fixed inside each of the first, second, and third spray pipes. Spray heads are fixedly arranged in an array at the lower ends of each of the first, second, and third spray pipes.
[0008] Preferably, the outer surface of the connecting pipe is fitted to the connection point of the spray head.
[0009] Preferably, the exhaust gas emission mechanism includes an L-shaped air intake pipe fixed inside the sealed tank, a differential pressure speed measuring instrument fixed inside the L-shaped air intake pipe, a connecting frame fixed at the upper end of the L-shaped air intake pipe, and an air outlet frame assembly fixed at the upper end of the connecting frame.
[0010] Preferably, the air outlet frame assembly is located between the packing assembly frame and the conical collection cylinder.
[0011] Preferably, the air outlet frame assembly includes a sealing tube connected to the connecting frame, a sealing airbag II is provided inside the sealing tube, and a plurality of air outlet holes are arrayed inside the sealing tube, with a filter plate fixed inside the air outlet holes.
[0012] Preferably, in the initial state, the sealing airbag and the air outlet are at the same height.
[0013] The technical solution provided by this invention has the following advantages compared with the known prior art: First, the differential pressure velocimeter can monitor the exhaust gas velocity in real time. Combined with the sealing airbag two of the exhaust frame assembly, adaptive adjustment is achieved. The exhaust gas pressure drives the sealing airbag two to move, thereby controlling the number and range of opening air outlets, ensuring that the exhaust gas enters the purification reaction area evenly and stably. At the same time, the filter plate inside the air outlet can initially intercept large particulate impurities, reducing the risk of blockage in subsequent components and laying the foundation for efficient purification. This effectively improves the stability of exhaust gas introduction and the initial purification effect. The sealing airbag one can flexibly adjust the number of spray heads according to the exhaust gas volume (e.g., only the middle spray pipe is opened when the exhaust gas volume is small, and all spray pipes are opened when the exhaust gas volume is large). This ensures the purification effect while reducing the waste of purification liquid, and at the same time, it can form a large area of atomized spraying area, greatly increasing the contact area between the purification liquid and the exhaust gas.
[0014] Secondly, the conical collecting cylinder can efficiently collect the purified waste liquid, and achieve automatic discharge through the cooperation of the elastic element and the conical block: in the initial state, the conical block seals the outlet pipe to prevent gas leakage; when the waste liquid accumulates to a certain pressure, the conical block is pressed down, and the waste liquid is automatically discharged through the outlet pipe without manual intervention, which improves the automation level of the equipment, reduces labor costs, and does not affect the sealing effect of the device. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.
[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the spray purification mechanism of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the image; Figure 5 This is a schematic diagram of the internal structure of the spray frame assembly of the present invention; Figure 6 This is a schematic diagram of the exhaust gas emission mechanism of the present invention; Figure 7 This is a schematic diagram of the internal structure of the air outlet frame assembly of the present invention.
[0017] Reference numerals: 1. Spray purification mechanism; 2. Exhaust gas emission mechanism; 10. Liquid outlet pipe; 11. Sealed tank; 12. Packing assembly frame; 13. Pumping mechanism; 14. Sealing plate; 15. Discharge pipe; 16. Spray frame assembly; 17. Conical collection cylinder; 18. Elastic element; 19. Conical block; 161. No. 1 spray pipe; 162. No. 2 spray pipe; 163. No. 3 spray pipe; 164. Connecting pipe; 165. Sealed airbag one; 166. Spray head; 21. L-shaped air inlet pipe; 22. Differential pressure velocimeter; 23. Connecting frame; 24. Air outlet frame assembly; 241. Sealing pipe; 242. Sealed airbag two; 243. Air outlet; 244. Filter plate. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0019] The present invention will be further described below with reference to embodiments.
[0020] Example: Refer to Figures 1 to 7 A tail gas purification device for sodium metabisulfite production includes: a spray purification mechanism 1, wherein the spray purification mechanism 1 is provided with a tail gas emission mechanism 2.
[0021] To further explain, the following settings are implemented to better purify the exhaust gas entering the device, such as... Figure 3 and Figure 4 As shown, the spray purification mechanism 1 includes a sealed tank 11. A packing assembly frame 12 is fixed in the middle of the inner cavity of the sealed tank 11. A pumping mechanism 13 is fixed on the outer surface of the sealed tank 11. A sealing plate 14 is fixed inside the sealed tank 11 above the packing assembly frame 12. Multiple arc-shaped grooves are arrayed on the upper end of the sealing plate 14. A discharge pipe 15 is embedded inside the sealed tank 11 above the sealing plate 14 and extends to the outside of the sealed tank 11. A spray frame assembly 16 is provided between the packing assembly frame 12 and the sealing plate 14. A conical collecting cylinder 17 is fixed inside the sealed tank 11 below the packing assembly frame 12. An outlet pipe 10 is fixed at the lower end of the conical collecting cylinder 17 and extends to the outside of the sealed tank 11. An elastic element 18 is fixedly connected inside the spray purification mechanism 1. A conical block 19 is fixed at the upper end of the elastic element 18. In the initial state, the conical block 19 fits against the inner wall of the outlet pipe 10.
[0022] To further explain, the following settings are made to ensure even spraying of the purification liquid, such as... Figure 5 As shown, the spray frame assembly 16 includes a first spray pipe 161 fixed to the lower end of the sealing plate 14. A second spray pipe 162 and a third spray pipe 163 are also fixed to the lower end of the sealing plate 14. A connecting pipe 164 is fixedly connected between the first spray pipe 161, the second spray pipe 162 and the third spray pipe 163. One of the connecting pipes 164 is connected to the pumping mechanism 13 by a pipeline. A sealing airbag 165 is fixed inside the first spray pipe 161, the second spray pipe 162 and the third spray pipe 163. Spray heads 166 are fixed in an array at the lower end of the first spray pipe 161, the second spray pipe 162 and the third spray pipe 163. The outer surface of the connecting pipe 164 is attached to the connection of the spray head 166. Specifically, the purified liquid is diverted through connecting pipe 164 to spray pipes 161, 162, and 163. By extracting gas from the sealed airbag 165, the purified liquid is atomized and sprayed evenly through the array of spray heads 166 at the lower end of each spray pipe, forming a large-area spray zone. This multi-pipe diversion and atomized spray design greatly increases the contact area between the purified liquid and the exhaust gas. Furthermore, by detecting the exhaust gas velocity, it is possible to determine the required amount of gas entering the device. When the volume of exhaust gas is small, the gas in the sealed air bladders 165 inside the No. 1 spray pipe 161 and the No. 3 spray pipe 163 can be extracted, allowing only the spray head 166 under the No. 2 spray pipe 162 in the middle to spray the essence downwards. When the volume of exhaust gas is large, the gas in all the sealed air bladders 165 can be extracted, allowing all the spray heads 166 to spray the purification liquid downwards simultaneously. This saves the treatment liquid while ensuring that the device can properly purify the exhaust gas.
[0023] To further explain, the following settings are made in order to detect the amount of exhaust gas entering the device, such as... Figure 6 As shown, the exhaust emission mechanism 2 includes an L-shaped intake pipe 21 fixed inside the sealed tank 11. A differential pressure speed meter 22 is fixed inside the L-shaped intake pipe 21. A connecting frame 23 is fixed at the upper end of the L-shaped intake pipe 21. An exhaust frame assembly 24 is fixed at the upper end of the connecting frame 23. The exhaust frame assembly 24 is located between the packing assembly frame 12 and the conical collection cylinder 17.
[0024] To further explain, the following settings are implemented to ensure that the exhaust gas can be quickly and evenly distributed within the device, such as... Figure 7 As shown, the air outlet frame assembly 24 includes a sealing tube 241 that communicates with the connecting frame 23. The sealing tube 241 is provided with a sealing airbag 242. Multiple air outlet holes 243 are arrayed in the sealing tube 241. In the initial state of the device, the sealing airbag 242 and the air outlet holes 243 are at the same height. A filter plate 244 is fixed in the air outlet hole 243. The working principle of this invention is as follows: The tail gas generated during the sodium metabisulfite production process first enters the tail gas emission mechanism 2, and is transported through the L-shaped inlet pipe 21. During the flow, the flow velocity is monitored in real time by the differential pressure velocimeter 22 (the differential pressure velocimeter 22 has a throttling element, i.e., an orifice plate. When the tail gas flows in the L-shaped inlet pipe 21, the flow cross section suddenly narrows when the airflow passes through the orifice plate, the flow velocity increases sharply, and the static pressure decreases; a low-pressure zone is formed downstream of the orifice plate due to eddies. The pressure difference before and after the orifice plate is proportional to the square of the flow velocity, and the wind speed can be calculated by the differential pressure transmitter). Then, it is introduced into the sealed pipe 241 of the outlet frame assembly 24 through the connecting frame 23. When the tail gas flows in the sealed pipe 241, it will be discharged through the air outlet 243 on its surface. During the initial filtration process by the filter plate 244, large particulate impurities in the exhaust gas can be effectively intercepted, preventing subsequent components from being blocked and laying a good foundation for subsequent purification treatment. At the same time, the sealing airbag 242 can adaptively adjust the air outlet state according to the exhaust gas pressure (the sealing airbag 242 needs to be moved upward by the impact force generated when the exhaust gas flows to release the airtight seal on the air outlet 243 so that the exhaust gas can be discharged from the air outlet 243. The moving distance of the sealing airbag 242 is determined by the amount of exhaust gas entering the sealing pipe 241), ensuring that the exhaust gas stably enters the reaction area between the packing assembly frame 12 and the conical collection cylinder 17 inside the sealed tank 11, improving the stability of the exhaust gas introduction and the initial purification effect. Meanwhile, the pumping mechanism 13 delivers the purified liquid through a pipeline to the connecting pipe 164 of the spray frame assembly 16. The purified liquid is then distributed through the connecting pipe 164 to the first spray pipe 161, the second spray pipe 162, and the third spray pipe 163. By extracting the gas from the sealed airbag 165, the purified liquid can be evenly atomized and sprayed out through the array of spray heads 166 at the lower end of each spray pipe, forming a large-area spraying area. This multi-pipe diversion and atomized spraying design greatly increases the contact area between the purified liquid and the exhaust gas. Furthermore, by detecting the exhaust gas flow rate, the amount of exhaust gas that needs to be treated entering the device can be determined. When the amount of exhaust gas is small, the first spray pipe 161 and the third spray pipe 163 can be extracted. The gas in the inner sealed airbag 165 allows the spray head 166 under the second spray pipe 162 in the middle to spray the essence downwards. When the exhaust gas volume is large, the gas in all the sealed airbags 165 can be extracted, so that all the spray heads 166 can spray the purification liquid downwards at the same time. While saving the treatment liquid, it can ensure that the device can properly purify the exhaust gas. The atomized purification liquid and the exhaust gas discharged from the outlet 243 are in full contact near the packing assembly frame 12. The packing assembly frame 12 further increases the gas-liquid contact area and contact time, so that the harmful components in the exhaust gas (such as sulfur dioxide) can fully react with the purification liquid, which significantly improves the efficiency and effect of exhaust gas purification. After purification, the mixture flows downward under gravity and is collected by the conical collecting cylinder 17. In the initial state of the device, the conical block 19 adheres to the inner wall of the liquid outlet pipe 10 under the elastic force of the elastic element 18, forming a good seal to prevent leakage of incompletely collected gas. When the liquid in the conical collecting cylinder 17 accumulates to a certain amount, the liquid pressure overcomes the elastic force of the elastic element 18, pushing the conical block 19 downward, and the liquid is discharged from the equipment through the liquid outlet pipe 10, facilitating subsequent recycling or centralized treatment. This achieves automatic liquid discharge without manual intervention, saving labor costs and preventing excessive liquid accumulation from affecting the normal operation of the equipment. The purified gas flows upward and passes through multiple arc-shaped grooves on the sealing plate 14. The arc-shaped grooves guide the gas to diffuse evenly, allowing the gas to smoothly enter the area above the sealing plate 14, and finally exit the equipment through the discharge pipe 15 that penetrates the sealed tank 11, completing the entire exhaust gas purification process.
[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.
Claims
1. A tail gas purification device for sodium metabisulfite production, characterized in that, include: Spray purification mechanism (1), wherein the spray purification mechanism (1) is provided with exhaust gas emission mechanism (2). The spray purification mechanism (1) includes a sealed tank (11), a packing assembly frame (12) is fixed in the middle of the inner cavity of the sealed tank (11), a pumping mechanism (13) is fixed on the outer surface of the sealed tank (11), a sealing plate (14) is fixed in the sealed tank (11) above the packing assembly frame (12), and a plurality of arc-shaped grooves are arrayed on the upper end of the sealing plate (14). A discharge pipe (15) is embedded in the sealed tank (11) above the sealing plate (14), and the discharge pipe (15) passes through... A spray frame assembly (16) is provided between the packing assembly frame (12) and the sealing plate (14) and extends to the outside of the sealed tank (11). A conical collecting cylinder (17) is fixed inside the sealed tank (11) below the packing assembly frame (12). A liquid outlet pipe (10) is fixed at the lower end of the conical collecting cylinder (17). The lower end of the liquid outlet pipe (10) extends to the outside of the sealed tank (11). An elastic element (18) is fixedly connected inside the spray purification mechanism (1). A conical block (19) is fixed at the upper end of the elastic element (18).
2. The tail gas purification equipment for sodium metabisulfite production according to claim 1, characterized in that, In the initial state, the conical block (19) fits against the inner wall of the liquid outlet pipe (10).
3. The tail gas purification equipment for sodium metabisulfite production according to claim 1, characterized in that, The spray frame assembly (16) includes a first spray pipe (161) fixed to the lower end of the sealing plate (14). The lower end of the sealing plate (14) is also fixed with a second spray pipe (162) and a third spray pipe (163). A connecting pipe (164) is fixedly connected between the first spray pipe (161), the second spray pipe (162) and the third spray pipe (163). One of the connecting pipes (164) is connected to the pumping mechanism (13) by a pipeline. A sealing airbag (165) is fixed inside the first spray pipe (161), the second spray pipe (162) and the third spray pipe (163). Spray heads (166) are fixedly arranged in an array at the lower end of the first spray pipe (161), the second spray pipe (162) and the third spray pipe (163).
4. The tail gas purification equipment for sodium metabisulfite production according to claim 3, characterized in that, The outer surface of the connecting pipe (164) is attached to the connection point of the spray head (166).
5. The tail gas purification equipment for sodium metabisulfite production according to claim 1, characterized in that, The exhaust gas emission mechanism (2) includes an L-shaped air intake pipe (21) fixed inside a sealed tank (11), a differential pressure speed meter (22) fixed inside the L-shaped air intake pipe (21), a connecting frame (23) fixed at the upper end of the L-shaped air intake pipe (21), and an air outlet frame assembly (24) fixed at the upper end of the connecting frame (23).
6. The tail gas purification equipment for sodium metabisulfite production according to claim 5, characterized in that, The air outlet frame assembly (24) is located between the packing assembly frame (12) and the conical collection cylinder (17).
7. The tail gas purification equipment for sodium metabisulfite production according to claim 5, characterized in that, The air outlet frame assembly (24) includes a sealing tube (241) connected to the connecting frame (23). The sealing tube (241) is provided with a sealing airbag (242). Multiple air outlet holes (243) are arrayed in the sealing tube (241). A filter plate (244) is fixed in the air outlet hole (243).
8. The tail gas purification equipment for sodium metabisulfite production according to claim 7, characterized in that, In the initial state, the sealing airbag (242) and the air outlet (243) are at the same height.