Modular desulfurization and denitrification integrated device

Abstract

The utility model discloses modular desulfurization and denitration integrated device, including waste gas treatment tank, the one side fixed mounting of waste gas treatment tank has the air inlet pipe, the fixed mounting of waste gas treatment tank has the desulfurization tank, the one side fixed connection of desulfurization tank has first connecting pipe, one end fixed mounting of first connecting pipe has the mixing tank, the one side fixed connection of mixing tank has second connecting pipe, one end fixed mounting of second connecting pipe has the denitration tank, the one side fixed connection of denitration tank has the air outlet pipe, the outside of air outlet pipe is provided with the connecting mechanism. In the utility model, through unit waste gas treatment tank to waste gas desulfurization and denitration, reduced the area of occupation, more suitable for old factory reconstruction uses, while it is convenient for according to production load to increase or decrease the quantity of waste gas treatment tank, improve the flexibility of waste gas desulfurization and denitration treatment, reduce the waste of energy.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment equipment, specifically to a modular integrated desulfurization and denitrification device. Background Technology

[0002] Waste gas treatment is a key aspect of environmental protection, aiming to reduce the harm of waste gas generated during industrial production and energy utilization to the atmospheric environment and human health.

[0003] Desulfurization and denitrification technologies in waste gas treatment are key to controlling air pollution. Desulfurization and denitrification are methods for controlling sulfur dioxide (SO2) and nitrogen oxides (NOx) in industrial waste gases. x Key technologies for emissions control are of great significance to environmental protection and sustainable development. However, traditional waste gas desulfurization and denitrification treatment devices are large and complex with complex pipelines, occupying a large area, which is not conducive to the transformation of old plants. At the same time, traditional waste gas treatment devices are generally fixed, with fixed waste gas treatment rates, poor flexibility and difficulty in adjusting according to production load, resulting in waste of resources. Utility Model Content

[0004] To address the technical problems of existing traditional waste gas desulfurization and denitrification treatment devices being large in size and complex in piping, occupying a large area and being unsuitable for the renovation of old plants, as well as the fact that traditional waste gas treatment devices are generally fixed in place with a fixed waste gas treatment rate, lacking flexibility and difficult to adjust according to production load, resulting in waste of resources, this utility model provides a modular integrated desulfurization and denitrification device.

[0005] The technical solution adopted by this utility model is as follows: it includes an exhaust gas treatment box, an air inlet pipe is fixedly installed on one side of the exhaust gas treatment box, a desulfurization box is fixedly installed in the exhaust gas treatment box, a first connecting pipe is fixedly connected to one side of the desulfurization box, a mixing box is fixedly installed at one end of the first connecting pipe, a second connecting pipe is fixedly connected to one side of the mixing box, a denitrification box is fixedly installed at one end of the second connecting pipe, an exhaust pipe is fixedly connected to one side of the denitrification box, and a connecting mechanism is provided on the outside of the exhaust pipe.

[0006] Furthermore, the connecting mechanism includes an upper fixing ring disposed outside the air outlet pipe and a lower fixing ring disposed below the upper fixing ring. Both the lower fixing ring and the upper fixing ring have mounting holes, through which fixing bolts are inserted. Fixing nuts are threaded onto the fixing bolts, and sealing gaskets are fixedly installed on the inner walls of both the upper fixing ring and the lower fixing ring.

[0007] By adopting the above technical solution, adjacent exhaust gas treatment boxes can be connected together.

[0008] Furthermore, a cover plate is fixedly connected to the desulfurization tank, an inlet pipe is fixedly connected to the cover plate, a one-way valve is fixedly installed on the inlet pipe, an outlet pipe is fixedly connected to one side of the cover plate, and a solenoid valve is fixedly installed on the outlet pipe.

[0009] By adopting the above technical solution, sulfur dioxide in the waste gas can be removed.

[0010] Furthermore, an ammonia spraying grid is fixedly connected to the mixing box, and several sets of spray nozzles are fixedly installed on the ammonia spraying grid.

[0011] By adopting the above technical solution, the waste gas is mixed with ammonia water or ammonia gas.

[0012] Furthermore, two sets of plate mixers are fixedly installed in the mixing chamber, and both sets of plate mixers are positioned above the ammonia injection grid.

[0013] By adopting the above technical solutions, the mixing effect of waste gas with ammonia water or ammonia gas can be improved.

[0014] Furthermore, several sets of fixing plates are fixedly installed in the denitrification box, and the sets of fixing plates are staggered. Catalyst layers are fixedly installed on both sides of the fixing plates.

[0015] By adopting the above technical solution, the waste gas reacts fully with ammonia water or ammonia gas under the action of the catalyst.

[0016] The beneficial effects of this utility model are: by using the exhaust gas treatment box in conjunction with the inlet pipe, desulfurization box, first connecting pipe, mixing box, second connecting pipe, denitrification box and exhaust pipe, the exhaust gas can complete the desulfurization and denitrification treatment in a single unit exhaust gas treatment box. The device is small in size and the pipeline is simple, which reduces the occupied area and makes it more suitable for the renovation of old plants.

[0017] By using an inlet pipe, an outlet pipe, an upper fixing ring, a lower fixing ring, mounting holes, fixing bolts, and fixing nuts, multiple unit exhaust gas treatment boxes can be connected into an exhaust gas treatment system. This allows for easy adjustment of the number of exhaust gas treatment boxes according to production load, improving the flexibility of exhaust gas desulfurization and denitrification treatment and reducing energy waste. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a cross-sectional structural diagram of the waste gas treatment box in this utility model;

[0020] Figure 3 This is a schematic diagram showing the connection between the air inlet pipe and the air outlet pipe in this utility model;

[0021] Figure 4This is a schematic diagram of the desulfurization box in this utility model;

[0022] Figure 5 This is a schematic diagram of the ammonia injection grid and plate mixer structure of this utility model;

[0023] Figure 6 This is a cross-sectional structural diagram of the denitrification box in this utility model.

[0024] The following are the labels in the diagram: 1. Waste gas treatment box; 2. Inlet pipe; 3. Desulfurization box; 4. First connecting pipe; 5. Mixing box; 6. Second connecting pipe; 7. Denitrification box; 8. Outlet pipe; 9. Upper fixing ring; 10. Lower fixing ring; 11. Mounting hole; 12. Fixing bolt; 13. Fixing nut; 14. Sealing gasket; 15. Cover plate; 16. Liquid inlet pipe; 17. One-way valve; 18. Liquid outlet pipe; 19. Solenoid valve; 20. Ammonia injection grid; 21. Nozzle; 22. Plate mixer; 23. Fixing plate; 24. Catalyst layer. Detailed Implementation

[0025] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The following is in conjunction with the appendix Figure 1-6 The present invention will be further described below.

[0028] To address the problems existing in the background technology, this application proposes the following technical solution: including an exhaust gas treatment box 1, an inlet pipe 2 fixedly installed on one side of the exhaust gas treatment box 1, a desulfurization box 3 fixedly installed in the exhaust gas treatment box 1, a first connecting pipe 4 fixedly connected to one side of the desulfurization box 3, a mixing box 5 fixedly installed at one end of the first connecting pipe 4, a second connecting pipe 6 fixedly connected to one side of the mixing box 5, a denitrification box 7 fixedly installed at one end of the second connecting pipe 6, an outlet pipe 8 fixedly installed on one side of the denitrification box 7, and a connecting mechanism provided on the outside of the outlet pipe 8.

[0029] The desulfurization tank 3 and the mixing tank 5 are connected internally via the first connecting pipe 4, and the mixing tank 5 and the denitrification tank 7 are connected internally via the second connecting pipe 6. Exhaust gas enters the desulfurization tank 3 via the inlet pipe 2, where it undergoes desulfurization. The desulfurized exhaust gas then enters the mixing tank 5 via the first connecting pipe 4, where it is thoroughly mixed with ammonia water or ammonia gas. The mixed exhaust gas then enters the denitrification tank 7 via the second connecting pipe 6, where it undergoes denitrification treatment. After passing inspection, the desulfurized and denitrified exhaust gas is discharged through the outlet pipe 8. The exhaust gas undergoes desulfurization and denitrification treatment in the unit exhaust gas treatment box 1. The exhaust gas treatment box 1 has a small volume and simple piping, greatly reducing the occupied area and making it more suitable for the renovation of old plants. Adjacent unit exhaust gas treatment boxes 1 can be connected together via a connecting mechanism, facilitating the increase or decrease of the number of exhaust gas treatment boxes 1 according to production load, improving the flexibility of exhaust gas treatment and reducing energy waste.

[0030] Furthermore, the connecting mechanism includes an upper fixing ring 9 located outside the air outlet pipe 8 and a lower fixing ring 10 located below the upper fixing ring 9. Both the lower fixing ring 10 and the upper fixing ring 9 have mounting holes 11. Fixing bolts 12 pass through the mounting holes 11, and fixing nuts 13 are threaded onto the fixing bolts 12. Sealing gaskets 14 are fixedly installed on the inner walls of both the upper fixing ring 9 and the lower fixing ring 10.

[0031] When it is necessary to increase the number of unit exhaust gas treatment boxes 1, after aligning the inlet pipe 2 and outlet pipe 8 of adjacent unit exhaust gas treatment boxes 1, the upper fixing ring 9 and the lower fixing ring 10 are fitted onto the connection between the inlet pipe 2 and the outlet pipe 8. The fixing bolt 12 is passed through the mounting holes 11 on the upper fixing ring 9 and the lower fixing ring 10, and the fixing nut 13 is fitted onto the fixing bolt 12 and tightened. The fixing bolt 12 and the fixing nut 13 are used to connect the upper fixing ring 9 and the lower fixing ring 10 into a whole and fit onto the connection between the inlet pipe 2 and the outlet pipe 8. At the connection point, the inlet pipe 2 and the outlet pipe 8 are connected together. The sealing gasket 14 effectively prevents the exhaust gas from escaping from the connection point between the inlet pipe 2 and the outlet pipe 8. The connecting mechanism allows adjacent exhaust gas treatment boxes 1 to be connected as a whole, improving the flexibility of exhaust gas treatment. After one round of treatment in one exhaust gas treatment box 1, the exhaust gas enters another exhaust gas treatment box 1 through the outlet pipe 8 and the inlet pipe 2 on another exhaust gas treatment box 1 for another round of treatment, ensuring the desulfurization and denitrification effect of the exhaust gas.

[0032] To further explain, a cover plate 15 is fixedly connected to the desulfurization box 3, an inlet pipe 16 is fixedly connected to the cover plate 15, a one-way valve 17 is fixedly installed on the inlet pipe 16, an outlet pipe 18 is fixedly connected to one side of the cover plate 15, and a solenoid valve 19 is fixedly installed on the outlet pipe 18.

[0033] The cover plate 15 is used to keep the upper opening of the desulfurization tank 3 sealed. Limestone absorbent slurry is added to the desulfurization tank 3 through the liquid inlet pipe 16. One end of the air inlet pipe 2 is inserted into the bottom of the desulfurization tank 3 so that it is immersed in the limestone absorbent slurry. The exhaust gas enters the limestone absorbent slurry through the air inlet pipe 2. The sulfur dioxide in the exhaust gas reacts with water to produce sulfurous acid. Calcium carbonate reacts with sulfurous acid to produce calcium sulfite, carbon dioxide and water. Calcium sulfite is oxidized again to calcium sulfate, thereby achieving desulfurization treatment of the exhaust gas. One end of the first connecting pipe 4 is located in the desulfurization tank 3 and above the surface of the limestone absorbent slurry. The desulfurized exhaust gas enters the mixing tank 5 through the first connecting pipe 4. The one-way valve 17 is set to prevent the exhaust gas from escaping from the liquid inlet pipe 16. When the reaction product slurry in the desulfurization tank 3 reaches a certain density, it is discharged from the liquid outlet pipe 18 to the external desulfurization by-product system. After dehydration, it forms gypsum, which can be comprehensively utilized.

[0034] Furthermore, an ammonia spraying grid 20 is fixedly connected to the mixing box 5, and several sets of spray nozzles 21 are fixedly installed on the ammonia spraying grid 20.

[0035] The desulfurized exhaust gas enters the mixing box 5 through the first connecting pipe 4. One end of the first connecting pipe 4 is located at the bottom of the mixing box 5. The exhaust gas rises in the mixing box 5. The ammonia injection grid 20 is connected to an external ammonia water or ammonia gas supply device (not shown in the attached figure). Ammonia water or ammonia gas enters the ammonia injection grid 20 and is then sprayed out from the nozzle 21 to mix with the rising exhaust gas, preparing for the next step of denitrification treatment.

[0036] Furthermore, two sets of plate mixers 22 are fixedly installed in the mixing box 5, and both sets of plate mixers 22 are positioned above the ammonia injection grid 20.

[0037] The mixed exhaust gas in the mixing box 5 continues to pass upward through the plate mixer 22. The plate mixer 22 is composed of plate mixing blades that are alternately tilted to change the airflow direction in order to achieve full mixing of exhaust gas with ammonia water or ammonia gas, thus ensuring the subsequent denitrification effect of exhaust gas.

[0038] Furthermore, several sets of fixing plates 23 are fixedly installed in the denitrification box 7, and the sets of fixing plates 23 are staggered. Catalyst layers 24 are fixedly installed on both sides of the fixing plates 23.

[0039] Several sets of fixed plates 23 are distributed vertically in the denitrification box 7, with adjacent fixed plates 23 staggered to form an "S"-shaped exhaust gas channel inside the denitrification box 7. This increases the contact area and time between the mixed exhaust gas and the catalyst layer 24. The exhaust gas mixed in the mixing box 5 enters the denitrification box 7 through the second connecting pipe 6. Under the action of the catalyst layer 24, ammonia is used as a reducing agent to reduce NOx in the exhaust gas to nitrogen and water, thus achieving denitrification treatment of the exhaust gas. The catalyst layer 24 is composed of titanium dioxide as a carrier and doped with active ingredients such as vanadium pentoxide, molybdenum trioxide, and tungsten trioxide. The second connecting pipe 6 is equipped with an exhaust gas preheating device (the preheating device is an existing mature technology, such as a shell-and-tube heat exchanger or a rotary preheater, not shown in the attached figure), which heats the exhaust gas to the temperature required for denitrification (usually 300-400℃). After desulfurization and denitrification treatment in the desulfurization box 3 and the denitrification box 7, the exhaust gas is discharged from the exhaust gas treatment box 1 through the exhaust pipe 8.

[0040] The specific operation is as follows: Exhaust gas enters the limestone absorption slurry in the desulfurization tank 3 through the inlet pipe 2. Sulfur dioxide in the exhaust gas reacts with water to form sulfurous acid, and calcium carbonate reacts with sulfurous acid to form calcium sulfite, carbon dioxide, and water. Calcium sulfite is then oxidized back to calcium sulfate, thus achieving desulfurization of the exhaust gas. The desulfurized exhaust gas enters the mixing tank 5 through the first connecting pipe 4. The exhaust gas rises in the mixing tank 5, and ammonia water or ammonia gas is sprayed from the nozzle 21 to mix with the rising exhaust gas. The plate mixer 22 makes the exhaust gas more uniformly mixed. The mixed exhaust gas enters the denitrification tank 7. Under the action of the catalyst layer 24, using ammonia gas as a reducing agent, the NOx in the exhaust gas is reduced to nitrogen and water, achieving desulfurization of the exhaust gas. After desulfurization and denitrification treatment in desulfurization box 3 and denitrification box 7, the exhaust gas is discharged from exhaust gas treatment box 1 through exhaust pipe 8. When it is necessary to increase the number of unit exhaust gas treatment boxes 1, the inlet pipe 2 and the outlet pipe 8 of the adjacent unit exhaust gas treatment box 1 are aligned, and the upper fixing ring 9 and the lower fixing ring 10 are fitted onto the connection of the inlet pipe 2 and the outlet pipe 8. The fixing bolt 12 is passed through the mounting hole 11 on the upper fixing ring 9 and the lower fixing ring 10, and the fixing nut 13 is fitted onto the fixing bolt 12 and tightened. The upper fixing ring 9 and the lower fixing ring 10 are connected into a whole by the fixing bolt 12 and the fixing nut 13, and the inlet pipe 2 and the outlet pipe 8 are connected together.

[0041] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0042] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A modular integrated desulfurization and denitrification device, characterized in that, The system includes an exhaust gas treatment box (1), an inlet pipe (2) is fixedly installed on one side of the exhaust gas treatment box (1), a desulfurization box (3) is fixedly installed in the exhaust gas treatment box (1), a first connecting pipe (4) is fixedly connected to one side of the desulfurization box (3), a mixing box (5) is fixedly installed at one end of the first connecting pipe (4), a second connecting pipe (6) is fixedly connected to one side of the mixing box (5), a denitrification box (7) is fixedly installed at one end of the second connecting pipe (6), an outlet pipe (8) is fixedly connected to one side of the denitrification box (7), and a connecting mechanism is provided on the outside of the outlet pipe (8).

2. The modular desulfurization and denitrification integrated device according to claim 1, characterized in that, The connecting mechanism includes an upper fixing ring (9) disposed outside the air outlet pipe (8) and a lower fixing ring (10) disposed below the upper fixing ring (9). Both the lower fixing ring (10) and the upper fixing ring (9) are provided with mounting holes (11). A fixing bolt (12) passes through the mounting hole (11). A fixing nut (13) is threaded onto the fixing bolt (12). A sealing gasket (14) is fixedly installed on the inner wall of both the upper fixing ring (9) and the lower fixing ring (10).

3. The modular desulfurization and denitrification integrated device according to claim 2, characterized in that, A cover plate (15) is fixedly connected to the desulfurization box (3), an inlet pipe (16) is fixedly connected to the cover plate (15), a one-way valve (17) is fixedly installed on the inlet pipe (16), an outlet pipe (18) is fixedly connected to one side of the cover plate (15), and a solenoid valve (19) is fixedly installed on the outlet pipe (18).

4. The modular desulfurization and denitrification integrated device according to claim 3, characterized in that, The mixing box (5) is fixedly connected to an ammonia spraying grid (20), and several sets of spray nozzles (21) are fixedly installed on the ammonia spraying grid (20).

5. The modular desulfurization and denitrification integrated device according to claim 4, characterized in that, Two sets of plate mixers (22) are fixedly installed in the mixing box (5), and both sets of plate mixers (22) are set above the ammonia injection grid (20).

6. The modular desulfurization and denitrification integrated device according to claim 5, characterized in that, The denitrification box (7) is fixedly installed with several sets of fixing plates (23), which are staggered. Catalyst layers (24) are fixedly installed on both sides of the fixing plates (23).

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