A blended super activated carbon desulfurization regeneration system flue gas bypass device

Abstract

This application relates to the field of industrial flue gas purification and desulfurization and regeneration technology of blended super activated carbon, and in particular to a flue gas bypass device for a blended super activated carbon desulfurization and regeneration system. The device includes a main pipe and a bypass pipe, with the bypass pipe located on one side of the main pipe. Bypass shut-off valves are installed at both ends of the bypass pipe. A first main flue gas shut-off valve and a second main flue gas shut-off valve are respectively installed at both ends of the main pipe. This invention utilizes multiple atomizing spray heads evenly distributed on the diversion pipe in the spray assembly to fully atomize the absorbent liquid, significantly increasing the contact area with the flue gas and improving SO2 absorption efficiency. The circulation assembly, relying on a storage tank, return pipe, supply pipe, and a self-priming circulation pump, constructs an absorbent liquid recovery and circulation system, reducing desulfurization agent consumption and lowering waste liquid collection and treatment costs. The accompanying activated carbon adsorption tank assists in adsorbing sulfides, further improving desulfurization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of industrial flue gas purification and blended super activated carbon desulfurization and regeneration technology, specifically a flue gas bypass device for a blended super activated carbon desulfurization and regeneration system. Background Technology

[0002] The working principle of desulfurization and sulfuric acid production using blended super activated carbon is as follows: Flue gas containing sulfur dioxide is pretreated and then enters a desulfurization tower containing super activated carbon through the main pipeline. The sulfur dioxide in the flue gas is adsorbed on the surface of the super activated carbon and reacts with oxygen in the flue gas under catalytic oxidation to produce sulfur trioxide. After slowly reaching a certain saturation concentration, it reacts with water in the desulfurization tower to produce dilute sulfuric acid, which is then recycled and reused through pipelines.

[0003] In the actual operation of the blended super activated carbon desulfurization and regeneration system, the activated carbon adsorption device in the main pipeline needs to be regenerated or maintained regularly. When the adsorption device malfunctions, it is also necessary to shut down the system for troubleshooting. In order to avoid production interruption due to system shutdown, the existing system is usually equipped with a flue gas bypass device to temporarily divert the flue gas to the bypass when the main pipeline system is shut down, so as to ensure production continuity.

[0004] Although some bypasses are equipped with simple spray structures, the atomization effect of the spray heads is poor, the contact area between the absorbent liquid and the flue gas is small, and the SO2 absorption efficiency is insufficient. At the same time, the absorbent liquid is mostly used for single use and no recycling system has been built, which not only causes a lot of waste of desulfurization agents, but also increases the cost of waste liquid collection and treatment. Therefore, a new solution is needed to solve this problem. Utility Model Content

[0005] In view of the shortcomings and defects of the existing technology mentioned above, such as poor atomization effect of spray head, insufficient SO2 absorption efficiency, and the fact that the absorbent liquid is mostly used once, resulting in a large waste of desulfurization agents.

[0006] The present invention discloses a flue gas bypass device for a blended super activated carbon desulfurization and regeneration system, comprising a main pipe and a bypass pipe. The bypass pipe is disposed on one side of the main pipe, and bypass shut-off valves are provided at both ends of the bypass pipe. A first main flue gas shut-off valve and a second main flue gas shut-off valve are respectively provided at both ends of the main pipe. The main pipe is connected to the bypass pipe on one side of the first main flue gas shut-off valve and the second main flue gas shut-off valve. A spray assembly is provided in the middle of the bypass pipe, and a circulation assembly is provided at the lower part of the bypass pipe.

[0007] Furthermore, the spray assembly includes a diverter pipe and an atomizing spray head. The atomizing spray head is installed on the diverter pipe, and the diverter pipe is installed on the bypass pipe. The diverter pipe is disposed inside the bypass pipe, with one end of the diverter pipe passing through the bypass pipe. A sealing ring is provided between the diverter pipe and the bypass pipe.

[0008] Furthermore, the circulation component includes a liquid storage tank, one end of which is connected to the lower end of the bypass pipe via a return pipe, and the other end of which is connected to the diversion pipe via a supply pipe. Both the return pipe and the supply pipe are equipped with self-priming circulation pumps.

[0009] Furthermore, the liquid storage tank is provided with a liquid replenishment port at the upper end, a drain port at the lower end, and a liquid level sensor on one side of the liquid storage tank.

[0010] Furthermore, a metal sintered mesh is provided below the atomizing spray head, the metal sintered mesh is provided in four layers, and differential pressure monitors are provided above and below the metal sintered mesh, the differential pressure monitors are installed on the inner wall of the bypass pipe.

[0011] Furthermore, an inner tube is provided on the inner wall of the bypass pipe, the inner tube is located below the metal sintered mesh, a cooling pipe is provided inside the inner tube, and a cooling water inlet and a cooling water outlet are provided on the bypass pipe, with the two ends of the cooling pipe connected to the cooling water inlet and the cooling water outlet respectively.

[0012] Furthermore, an activated carbon adsorption tank is provided above the diversion pipe, and the activated carbon adsorption tank is fixedly installed on the bypass pipe. Multiple atomizing spray heads are provided, and the multiple atomizing spray heads are evenly distributed on the diversion pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model utilizes multiple atomizing spray heads evenly distributed on the diversion pipe of the spray assembly to fully atomize the absorbent liquid, significantly increasing the contact area with the flue gas and improving the SO2 absorption effect; the circulation assembly relies on the storage tank, return pipe, supply pipe and self-priming circulation pump to construct an absorbent liquid recovery and circulation system, reducing the consumption of desulfurization agents, while reducing the cost of waste liquid collection and treatment, and the matched activated carbon adsorption tank assists in adsorbing sulfides, further improving the desulfurization efficiency.

[0014] 2. The metal sintered mesh of this utility model has four layers and is equipped with differential pressure monitors at the top and bottom. It can not only efficiently filter impurities in flue gas and avoid clogging of subsequent components, but also provide timely warning of the filter status through differential pressure changes, which is convenient for timely maintenance. The inner tube and internal cooling pipe of the bypass pipe achieve flue gas cooling through the cooling water inlet and outlet, which is suitable for high-temperature flue gas scenarios. It protects the bypass pipe from high temperature damage and maintains a stable desulfurization reaction environment. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the present invention; Figure 3 This is a partial sectional view of the bypass tube of this utility model; Figure 4 This is a schematic diagram of the bypass tube of this utility model.

[0016] In the diagram: 1. Main pipe; 2. Bypass pipe; 3. First main flue gas shut-off valve; 4. Second main flue gas shut-off valve; 5. Bypass shut-off valve; 6. Inner pipe; 7. Cooling pipe; 8. Cooling water inlet; 9. Cooling water outlet; 10. Metal sintered mesh; 11. Differential pressure monitor; 12. Diverter pipe; 13. Atomizing spray head; 14. Activated carbon adsorption tank; 15. Liquid storage tank; 16. Return pipe; 17. Supply pipe; 18. Liquid replenishment port; 19. Drain outlet; 20. Liquid level sensor. Detailed Implementation

[0017] The following illustrations will reveal several embodiments of the present invention. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in a simple schematic manner in the illustrations.

[0018] Please see Figure 1 , Figure 2 The present invention relates to a flue gas bypass device for a blended super activated carbon desulfurization and regeneration system, comprising a main pipe 1 and a bypass pipe 2. The bypass pipe 2 is located on one side of the main pipe 1, and bypass shut-off valves 5 are provided at both ends of the bypass pipe 2. A first main flue gas shut-off valve 3 and a second main flue gas shut-off valve 4 are respectively provided at both ends of the main pipe 1. The main pipe 1 is connected to the bypass pipe 2 on one side of the first main flue gas shut-off valve 3 and the second main flue gas shut-off valve 4.

[0019] In this embodiment, the first main flue gas shut-off valve 3, the second main flue gas shut-off valve 4, and the bypass shut-off valve 5 are all made of PTFE-lined cast steel. The valve seat and valve core sealing surface are made of polytetrafluoroethylene, which can withstand corrosive media such as SO2 and HCl in the flue gas, ensuring long-term sealing without leakage. It is connected to the system PLC and supports remote automatic control. A spray assembly is set in the middle of the bypass pipe 2. The spray assembly includes a diversion pipe 12 and an atomizing spray head 13. The atomizing spray head 13 is a spiral centrifugal atomizing nozzle. The diversion pipe 12 is made of 316L stainless steel and is wrapped with a polytetrafluoroethylene insulation layer.

[0020] See Figure 1 , Figure 3 , Figure 4As shown, the atomizing spray head 13 is installed on the diversion pipe 12, which is installed on the bypass pipe 2. The diversion pipe 12 is located inside the bypass pipe 2, with one end of the diversion pipe 12 passing through the bypass pipe 2. A sealing ring is provided between the diversion pipe 12 and the bypass pipe 2. An activated carbon adsorption tank 14 is provided above the diversion pipe 12 and is fixedly installed on the bypass pipe 2. Multiple atomizing spray heads 13 are provided and are evenly distributed on the diversion pipe 12. A metal sintered mesh 10 is provided below the atomizing spray head 13. The metal sintered mesh 10 adopts a multi-layer sintered structure of 316L stainless steel.

[0021] See 2. Figure 3 As shown, the sintered metal mesh 10 has four layers. Differential pressure monitors 11 are installed above and below the sintered metal mesh 10. The differential pressure monitors 11 are installed on the inner wall of the bypass pipe 2. The differential pressure monitors 11 are diffused silicon differential pressure transmitters. An inner pipe 6 is installed on the inner wall of the bypass pipe 2. The inner pipe 6 is located below the sintered metal mesh 10. A cooling pipe 7 is installed inside the inner pipe 6. A cooling water inlet 8 and a cooling water outlet 9 are installed on the bypass pipe 2. The two ends of the cooling pipe 7 are connected to the cooling water inlet 8 and the cooling water outlet 9, respectively.

[0022] See Figure 2 , Figure 4 The lower part of the bypass pipe 2 shown is equipped with a circulation component, which includes a liquid storage tank 15. One end of the liquid storage tank 15 is connected to the lower end of the bypass pipe 2 through a return pipe 16, and the other end of the liquid storage tank 15 is connected to the diversion pipe 12 through a supply pipe 17. Both the return pipe 16 and the supply pipe 17 are equipped with self-priming circulation pumps. The upper end of the liquid storage tank 15 is equipped with a replenishment port 18, and the lower end of the liquid storage tank 15 is equipped with a drain port 19. A liquid level sensor 20 is installed on one side of the liquid storage tank 15. The liquid level sensor 20 is an immersion type liquid level gauge.

[0023] The implementation principle is as follows: When the blended super activated carbon desulfurization and regeneration system is running normally, the device takes the main pipe 1 as the core flue gas treatment channel. The first main flue gas shut-off valve 3 and the second main flue gas shut-off valve 4 at both ends of the main pipe 1 are kept fully open, while the bypass shut-off valve 5 at both ends of the bypass pipe 2 is kept closed. The industrial flue gas directly enters the main pipe 1 and completes the sulfide adsorption and desulfurization through the blended super activated carbon adsorption device in the main pipe 1. The treated flue gas that meets the standards is discharged through the second main flue gas shut-off valve 4, which meets the environmental protection emission requirements. When the blended super activated carbon adsorption device in the main pipe 1 needs to be regenerated, maintained, or repaired regularly, or when a malfunction occurs and the machine needs to be shut down for troubleshooting, start the flue gas bypass device. First, gradually close the first main flue gas shut-off valve 3 and the second main flue gas shut-off valve 4 on the main pipe 1 to cut off the flue gas flow in the main pipe 1. After the valves in the main pipe 1 are completely closed, gradually open the bypass shut-off valves 5 at both ends of the bypass pipe 2 to create a temporary flue gas diversion channel, ensuring that industrial flue gas can smoothly enter the bypass pipe 2 and ensuring production continuity. The flue gas first flows through the activated carbon adsorption tank 14 inside the bypass pipe 2 and above the diversion pipe 12. The adsorption material in the activated carbon adsorption tank 14 can initially adsorb some of the sulfides in the flue gas, completing the first stage of desulfurization. The storage tank 15 delivers the desulfurization absorption liquid to the diversion pipe 12 and into the atomizing spray head 13 through the supply pipe 17. After passing through the atomizing spray head 13, the absorption liquid forms fine droplets, which greatly increases the contact area with the flue gas. The absorbed liquid after spraying flows down along the inner wall of the bypass pipe 2 and flows back to the storage tank 15 through the return pipe 16. When the liquid level is insufficient, new absorption liquid is added through the upper replenishment port 18, and the waste liquid is discharged periodically through the lower drain port 19. The flue gas that has completed spray desulfurization continues to flow downwards and enters the four-layer metal sintered mesh 10 area; the four-layer metal sintered mesh 10 can efficiently filter dust and impurities carried in the flue gas, and the differential pressure monitor 11 monitors the pressure difference on both sides of the filter in real time: when the pressure difference exceeds the set threshold, it indicates that the filter is blocked, and a maintenance warning is issued in time, which makes it convenient for staff to clean or replace the filter and ensure the smooth flow of the bypass pipe. The filtered flue gas enters the inner pipe 6 area at the bottom of the bypass pipe 2; cooling water enters the cooling pipe 7 from the cooling water inlet 8, absorbs the heat of the flue gas during the flow inside the pipe, and is then discharged from the cooling water outlet 9, thereby cooling the high-temperature flue gas; preventing the high-temperature flue gas from damaging the bypass pipe 2, and maintaining the stable temperature environment required for the desulfurization reaction, and then being discharged through the bypass shut-off valve 5 at the outlet end of the bypass pipe 2, ensuring that the SO2 concentration of the flue gas meets the standard.

[0024] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A flue gas bypass device for a blended super activated carbon desulfurization and regeneration system, comprising a main pipe (1) and a bypass pipe (2), characterized in that: The bypass pipe (2) is located on one side of the main pipe (1). Bypass shut-off valves (5) are provided at both ends of the bypass pipe (2). A first main flue gas shut-off valve (3) and a second main flue gas shut-off valve (4) are provided at both ends of the main pipe (1). The main pipe (1) is connected to the bypass pipe (2) on one side of the first main flue gas shut-off valve (3) and the second main flue gas shut-off valve (4). A spray assembly is provided in the middle of the bypass pipe (2). A circulation assembly is provided at the lower part of the bypass pipe (2).

2. The flue gas bypass device for a blended super activated carbon desulfurization and regeneration system according to claim 1, characterized in that: The spray assembly includes a split pipe (12) and an atomizing spray head (13). The atomizing spray head (13) is installed on the split pipe (12). The split pipe (12) is installed on the bypass pipe (2). The split pipe (12) is located inside the bypass pipe (2). One end of the split pipe (12) passes through the bypass pipe (2). A sealing ring is provided between the split pipe (12) and the bypass pipe (2).

3. The flue gas bypass device for a blended super activated carbon desulfurization and regeneration system according to claim 2, characterized in that: The circulation assembly includes a storage tank (15), one end of which is connected to the lower end of the bypass pipe (2) via a return pipe (16), and the other end of which is connected to the diversion pipe (12) via a supply pipe (17). Both the return pipe (16) and the supply pipe (17) are equipped with self-priming circulation pumps.

4. The flue gas bypass device for a blended super activated carbon desulfurization and regeneration system according to claim 3, characterized in that: The liquid storage tank (15) is provided with a liquid replenishment port (18) at the upper end, a drain port (19) at the lower end, and a liquid level sensor (20) on one side of the liquid storage tank (15).

5. The flue gas bypass device for a blended super activated carbon desulfurization and regeneration system according to claim 2, characterized in that: A metal sintered mesh (10) is provided below the atomizing spray head (13). The metal sintered mesh (10) has four layers. A differential pressure monitor (11) is provided above and below the metal sintered mesh (10). The differential pressure monitor (11) is installed on the inner wall of the bypass pipe (2).

6. The flue gas bypass device for a blended super activated carbon desulfurization and regeneration system according to claim 5, characterized in that: The inner wall of the side tube (2) is provided with an inner tube (6), which is located below the metal sintered mesh (10). A cooling pipe (7) is provided inside the inner tube (6). A cooling water inlet (8) and a cooling water outlet (9) are provided on the side tube (2). The two ends of the cooling pipe (7) are connected to the cooling water inlet (8) and the cooling water outlet (9) respectively.

7. The flue gas bypass device for a blended super activated carbon desulfurization and regeneration system according to claim 2, characterized in that: An activated carbon adsorption tank (14) is provided above the diversion pipe (12). The activated carbon adsorption tank (14) is fixedly installed on the side pipe (2). Multiple atomizing spray heads (13) are provided, and the multiple atomizing spray heads (13) are evenly distributed on the diversion pipe (12).

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