Gas mixing device for denitration

Abstract

The utility model provides a gas mixing device for denitration, which belongs to the technical field of flue gas denitration, and aims to solve the problem that the mixing efficiency of a reducing agent and flue gas is influenced due to the fact that the dispersing speed of the flue gas and the reducing agent entering a mixing tank is low in the prior art. The mixing tank is fixedly connected to the upper surface of the mounting seat; the driving motor is fixedly connected to the left side of the mixing tank; the flue gas inlet is fixedly connected to the right side of the mixing tank; the reducing agent inlet is fixedly connected to the right side of the mixing tank; the uniform mixing assembly is arranged in the mixing tank; and the anti-adhesion assembly is arranged in the mixing tank. According to the utility model, the mixing speed of the reducing agent and the flue gas is accelerated, the mixing effect of the flue gas and the reducing agent is enhanced, and a better mixing reaction environment is provided for the reducing agent and the flue gas.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas denitration, and more specifically, particularly relates to a gas mixing device for denitration. Background Art

[0002] As a technology for reducing nitrogen oxide (NOx) emissions, flue gas denitrification is based on the principle of reducing generated NOx to N, thereby removing NOx from the flue gas. Usually, a reducing agent (ammonia mixed gas) needs to be mixed with the flue gas, and then denitrification is carried out under the action of a catalyst. The existing gas mixing device generally consists of a mixing tank body, a flue gas inlet, a reducing agent inlet and an outlet.

[0003] Existing application number: CN202121061628.4, the utility model provides an SCR flue gas denitrification device, which relates to the technical field of SCR flue gas denitrification. The utility model includes a denitrification tower and a cooling device. The top of the denitrification tower is connected to a smoke pipe, and the surface of the denitrification tower is connected to an exhaust pipe. The end of the smoke pipe away from the denitrification tower is fixedly installed with a first flange, and the end of the first flange away from the smoke pipe is provided with a second flange. A sealing ring is provided between the first flange and the second flange. The smoke pipe is provided with a cooling device, and the cooling device includes two connecting blocks, and the two connecting blocks are fixedly mounted on the smoke pipe. A positioning rod is inserted on the side of the connecting block away from the smoke pipe. The utility model can cool the flange to prevent the temperature of the flue gas from being too high, which will melt the sealing gaskets on the two flanges, thereby causing the sealing of the connection between the two flanges to deteriorate and the flue gas to leak out, thereby improving the sealing after the two flanges are connected, making the setting of the cooling device more practical.

[0004] Based on the above, the positions of the flue gas inlet and the reducing agent inlet are fixed, so the flue gas and the reducing agent tend to gather together after being sprayed out, and disperse slowly. They can only gradually gather together to react with the flow of internal airflow, which greatly affects the mixing efficiency of the reducing agent and the flue gas. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a gas mixing device for denitrification, so as to solve the problem that the positions of the existing flue gas inlet and the reducing agent inlet are fixed, so the flue gas and the reducing agent are easy to gather together after being sprayed out, and the dispersion speed is slow. They can only gradually gather together with the flow of internal airflow to react, which greatly affects the mixing efficiency of the reducing agent and the flue gas.

[0006] The purpose and effect of the gas mixing device for denitration of the utility model are achieved by the following specific technical means:

[0007] A gas mixing device for denitration includes a mounting seat;

[0008] A mixing tank, the mixing tank is fixedly connected to the mounting base;

[0009] A driving motor, wherein the driving motor is fixedly connected to the left side of the mixing tank;

[0010] A first connecting shaft, wherein the first connecting shaft is coaxially fixedly connected to an end portion of a rotating shaft of the driving motor;

[0011] A smoke inlet, the smoke inlet is fixedly connected to the right side of the mixing tank;

[0012] A reducing agent inlet, wherein the reducing agent inlet is fixedly connected to the right side of the mixing tank;

[0013] A discharge port, the discharge port being fixedly connected to the mixing tank;

[0014] A uniform mixing component, wherein the uniform mixing component is arranged inside the mixing tank;

[0015] The anti-adhesion component is arranged inside the mixing tank.

[0016] Furthermore, the uniform mixing component includes:

[0017] A transmission worm, the transmission worm being coaxially fixedly connected to the right end of the first connecting shaft;

[0018] a first rotating shaft, the first rotating shaft being rotatably connected inside the mixing tank;

[0019] a first transmission shaft, the first transmission shaft being rotatably connected to the interior of the mixing tank;

[0020] The transmission worm wheel is provided with two pieces, and the two pieces of the transmission worm wheels are respectively coaxially fixedly connected to the first rotating shaft and the bottom of the first transmission shaft, and the two pieces of the transmission worm wheels are respectively meshed with the transmission worm.

[0021] Furthermore, the uniform mixing component also includes:

[0022] A first gear, the first gear being coaxially fixedly connected to the top of the first transmission shaft;

[0023] A second rotating shaft, the second rotating shaft is rotatably connected to the inside of the mixing tank, and the second rotating shaft is sleeved outside the first rotating shaft;

[0024] The second gear is coaxially fixedly connected to the bottom of the second rotating shaft, and the second gear is meshed with the first gear.

[0025] Furthermore, the uniform mixing component also includes:

[0026] A first fan blade, wherein the first fan blade is coaxially fixedly connected to the top of the first rotating shaft;

[0027] The second fan blade is coaxially fixedly connected to the outside of the second rotating shaft, and the second fan blade is arranged in a mirror image with the first fan blade.

[0028] Furthermore, the uniform mixing component also includes:

[0029] The baffle plate is provided in multiple pieces, and the multiple baffle plates are dispersedly fixedly connected to the top of the mixing tank, and two adjacent baffle plates are arranged in a mirror image.

[0030] Furthermore, the anti-adhesion component includes:

[0031] A second connecting shaft, the second connecting shaft is coaxially fixedly connected to the second fan blade;

[0032] A connecting member, the connecting member is fixedly connected to the top of the second connecting shaft;

[0033] The scraping piece is provided with two pieces, and the two scraping pieces are dispersedly fixedly connected under the connecting piece, and the outer surfaces of the two scraping pieces are in contact with the inner wall of the mixing tank.

[0034] Compared with the prior art, the utility model has the following beneficial effects:

[0035] Firstly, under the action of the uniform mixing component, after the reducing agent and the flue gas enter the mixing tank from the reducing agent inlet and the flue gas inlet respectively, they are quickly dispersed and mixed by the second fan blade and the first fan blade, and the second fan blade and the first fan blade will also drive the airflow to converge between the two, thereby enhancing the mixing effect of the flue gas and the reducing agent. Under the obstruction of multiple baffles, the discharge path of the mixed gas from the mixing tank to the exhaust port is increased, thereby increasing the residence time of the mixed gas in the mixing tank, thereby further improving the mixing effect of the flue gas and the reducing agent.

[0036] Secondly, after the solid particles mixed in the flue gas are contaminated inside the mixing tank, the second fan blade will drive the two scraping parts to rotate through the second connecting shaft, thereby scraping off the solid particles adhering to the inner wall of the mixing tank, and then discharge them from the exhaust port along with the mixed gas, thus keeping the mixing tank clean and providing a better mixing reaction environment for the reducing agent and flue gas.

[0037] The utility model enables the reducing agent and the smoke to be quickly dispersed and mixed after entering the mixing tank, and the discharge path of the mixed gas from the mixing tank to the discharge port is increased, thereby accelerating the mixing speed of the reducing agent and the smoke, and enhancing the mixing effect of the smoke and the reducing agent. Through the rotation of the two scraping parts, the solid particles adhering to the inner wall of the mixing tank are scraped off and then discharged from the discharge port along with the mixed gas, thereby providing the reducing agent and the smoke with a better mixing reaction environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1It is a schematic diagram of the overall structure of the utility model.

[0039] Figure 2 It is a schematic diagram of the internal structure of the mixing tank of the utility model.

[0040] Figure 3 It is a schematic diagram of the connecting piece structure of the utility model.

[0041] Figure 4 It is a schematic diagram of the transmission worm structure of the utility model.

[0042] Figure 5 It is a schematic diagram of the structure of the first rotating shaft and the second rotating shaft of the utility model.

[0043] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0044] 1. Mounting base; 2. Mixing tank; 3. Driving motor; 301. First connecting shaft; 302. Transmission worm; 4. Smoke inlet; 5. Reductant inlet; 6. Exhaust outlet; 7. First rotating shaft; 701. First fan blade; 702. Second connecting shaft; 8. First transmission shaft; 9. Transmission worm gear; 10. First gear; 11. Second rotating shaft; 1101. Second gear; 1102. Second fan blade; 12. Blocking plate; 13. Connecting piece; 14. Scraping piece. DETAILED DESCRIPTION

[0045] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention. Example

[0046] As attached Figure 1 To Attachment Figure 5 As shown:

[0047] The utility model provides a gas mixing device for denitration, comprising a mounting seat 1;

[0048] A mixing tank 2, the mixing tank 2 is fixedly connected to the mounting base 1;

[0049] A driving motor 3 is fixedly connected to the left side of the mixing tank 2;

[0050] A first connecting shaft 301, the first connecting shaft 301 is coaxially fixedly connected to the end of the rotating shaft of the driving motor 3;

[0051] A smoke inlet 4, which is fixedly connected to the right side of the mixing tank 2;

[0052] A reducing agent inlet 5, which is fixedly connected to the right side of the mixing tank 2;

[0053] A discharge port 6, the discharge port 6 is fixedly connected to the mixing tank 2;

[0054] The uniform mixing component is arranged inside the mixing tank 2 .

[0055] Among them, the uniform mixing components include:

[0056] A transmission worm 302, the transmission worm 302 is coaxially fixedly connected to the right end of the first connecting shaft 301;

[0057] A first rotating shaft 7, the first rotating shaft 7 is rotatably connected to the inside of the mixing tank 2;

[0058] A first transmission shaft 8, the first transmission shaft 8 is rotatably connected to the inside of the mixing tank 2;

[0059] The transmission worm gear 9 includes two transmission worm gears 9, which are coaxially fixedly connected to the bottom of the first rotating shaft 7 and the first transmission shaft 8, respectively. The two transmission worm gears 9 are respectively meshed with the transmission worm 302, so that the first connecting shaft 301 drives the first rotating shaft 7 and the first transmission shaft 8 to rotate through the worm gear transmission mechanism formed by the two transmission worm gears 9 respectively meshing with the transmission worm 302.

[0060] Among them, the uniform mixing component also includes:

[0061] A first gear 10, the first gear 10 is coaxially fixedly connected to the top of the first transmission shaft 8;

[0062] A second rotating shaft 11, the second rotating shaft 11 is rotatably connected to the inside of the mixing tank 2, and the second rotating shaft 11 is sleeved on the outside of the first rotating shaft 7;

[0063] The second gear 1101 is coaxially fixedly connected to the bottom of the second rotating shaft 11, and the second gear 1101 is meshed with the first gear 10. The effect brought about is that the first transmission shaft 8 drives the second rotating shaft 11 to rotate in the direction opposite to the rotation direction of the first rotating shaft 7 through the gear transmission mechanism formed by the meshing of the second gear 1101 and the first gear 10.

[0064] Among them, the uniform mixing component also includes:

[0065] A first fan blade 701, the first fan blade 701 is coaxially fixedly connected to the top of the first rotating shaft 7;

[0066] The second fan blade 1102 is coaxially fixedly connected to the outside of the second rotating shaft 11. The second fan blade 1102 and the first fan blade 701 are arranged in a mirror image. The effect brought about is that the second rotating shaft 11 and the first rotating shaft 7 respectively drive the second fan blade 1102 and the first fan blade 701 to rotate in opposite directions, so as to quickly break up and mix the flue gas and the reducing agent, and the second fan blade 1102 and the first fan blade 701 will also drive the airflow to converge between the two, thereby increasing the contact time between the flue gas and the reducing agent.

[0067] Among them, the uniform mixing component also includes:

[0068] The baffle plate 12 is provided in multiple pieces, and the multiple baffle plates 12 are dispersedly fixedly connected to the top of the mixing tank 2, and two adjacent baffle plates 12 are arranged in a mirror image. The effect brought about is that through the blocking of the multiple baffle plates 12, the time for the airflow to flow to the exhaust port 6 is prolonged, giving the reducing agent and the flue gas more time for mixing and reacting.

[0069] The specific usage and function of this embodiment are as follows:

[0070] After the flue gas enters from the flue gas inlet 4, the driving motor 3 is started and drives the first connecting shaft 301 to rotate. The first connecting shaft 301 drives the first rotating shaft 7 and the first transmission shaft 8 to rotate respectively through a worm gear transmission mechanism formed by two transmission worm wheels 9 meshing with the transmission worm 302 respectively. The first transmission shaft 8 drives the second rotating shaft 11 to rotate in the opposite direction to the rotation direction of the first rotating shaft 7 through a gear transmission mechanism formed by the second gear 1101 meshing with the first gear 10. The second rotating shaft 11 and the first rotating shaft 7 respectively drive the second fan blade 1102 and the first fan blade 701 to rotate in opposite directions, thereby quickly breaking up and mixing the flue gas and the reducing agent, and the second fan blade 1102 and the first fan blade 701 will also drive the airflow to converge between the two, thereby enhancing the mixing effect of the flue gas and the reducing agent; through the blocking of multiple baffles 12, the time for the airflow to flow to the exhaust port 6 is further extended, giving the reducing agent and the flue gas more time to mix and react, so that the flue gas and the reducing agent are better mixed. Example

[0071] Based on the first embodiment, as shown in the attached Figure 1 To Attachment Figure 5 As shown, an anti-adhesion component is also included, and the anti-adhesion component is arranged inside the mixing tank 2.

[0072] Among them, the anti-adhesion components include:

[0073] A second connecting shaft 702, the second connecting shaft 702 is coaxially fixedly connected to the second fan blade 1102;

[0074] A connecting member 13, the connecting member 13 is fixedly connected to the top of the second connecting shaft 702;

[0075] The scraping member 14 is provided with two pieces, and the two scraping members 14 are dispersedly fixedly connected under the connecting member 13 , and the outer surfaces of the two scraping members 14 are in contact with the inner wall of the mixing tank 2 .

[0076] The specific usage and function of this embodiment are as follows:

[0077] The flue gas will inevitably carry some solid particles. After these solid particles enter from the flue gas inlet 4, during the reaction between the reducing agent and the flue gas, a part of them will be discharged along with the mixed gas, and the other part may adhere to the inner wall of the mixing tank 2. The second fan blade 1102 drives the two scraping parts 14 to rotate through the second connecting shaft 702, thereby scraping off the solid particles adhered to the inner wall of the mixing tank 2, and then discharged from the exhaust port 6 along with the mixed gas.

Claims

1. A gas mixing device for denitration, comprising a mounting seat, a mixing tank, a driving motor, a first connecting shaft, a flue gas inlet, a reducing agent inlet, an outlet, a uniform mixing component and an anti-adhesion component; characterized in that: The mixing tank is fixedly connected to the mounting base; the driving motor is fixedly connected to the left side of the mixing tank; the first connecting shaft is coaxially fixedly connected to the end of the rotating shaft of the driving motor; the smoke inlet is fixedly connected to the right side of the mixing tank; the reducing agent inlet is fixedly connected to the right side of the mixing tank; the exhaust port is fixedly connected to the mixing tank; the uniform mixing component is arranged inside the mixing tank; the anti-adhesion component is arranged inside the mixing tank.

2. A denitration gas mixing device as claimed in claim 1, characterized in that: The uniform mixing component includes: a transmission worm, a first rotating shaft, a first transmission shaft and a transmission worm wheel; the transmission worm is coaxially fixedly connected to the right end of the first connecting shaft; the first rotating shaft is rotatably connected inside the mixing tank; the first transmission shaft is rotatably connected inside the mixing tank; the transmission worm wheel is provided with two pieces, the two transmission worm wheels are coaxially fixedly connected to the first rotating shaft and the bottom of the first transmission shaft respectively, and the two transmission worm wheels are respectively meshed with the transmission worm.

3. A denitration gas mixing device as claimed in claim 2, characterized in that: The uniform mixing assembly also includes: a first gear, a second rotating shaft and a second gear; the first gear is coaxially fixedly connected to the top of the first transmission shaft; the second rotating shaft is rotatably connected inside the mixing tank, and the second rotating shaft is sleeved on the outside of the first rotating shaft; the second gear is coaxially fixedly connected to the bottom of the second rotating shaft, and the second gear is meshed with the first gear.

4. A denitration gas mixing device as claimed in claim 3, characterized in that: The uniform mixing component also includes: a first fan blade and a second fan blade; the first fan blade is coaxially fixedly connected to the top of the first rotating shaft; the second fan blade is coaxially fixedly connected to the outside of the second rotating shaft, and the second fan blade is arranged in a mirror image with the first fan blade.

5. A denitration gas mixing device as claimed in claim 4, characterized in that: The uniform mixing component also includes: a baffle plate; the baffle plates are arranged in multiple pieces, the multiple baffle plates are dispersedly fixedly connected to the top of the mixing tank, and two adjacent baffle plates are arranged in a mirror image.

6. A denitration gas mixing device as claimed in claim 1, characterized in that: The anti-adhesion component includes: a second connecting shaft, a connecting member and a scraper; the second connecting shaft is coaxially fixedly connected to the second fan blade; the connecting member is fixedly connected to the top of the second connecting shaft; two scrapers are provided, and the two scrapers are dispersedly fixedly connected under the connecting member, and the outer surfaces of the two scrapers are in contact with the inner wall of the mixing tank.

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