Front biological deodorization device

Abstract

The utility model discloses a front biological deodorization device, which belongs to the technical field of waste gas treatment equipment and comprises a first-stage spray tower, a second-stage spray tower, a third-stage spray tower, a fourth-stage spray tower and a demisting tower which are sequentially communicated through exhaust pipes from left to right. The first-stage spraying tower, the second-stage spraying tower, the third-stage spraying tower, the fourth-stage spraying tower and the demisting tower are the same in structure and each comprise a tower body, a gas outlet is formed in the center of the top of each tower body, a gas inlet is formed in the periphery of the bottom of each tower body, a gas distribution grating plate is fixedly connected to the interior of each tower body, and a gas outlet is formed in the top of each gas distribution grating plate. Nitrification liquid of an aerobic system at the rear end of sewage treatment can be used as spraying liquid, and Pall ring filler and hollow ball filler are additionally arranged, so that the pollution of the device is reduced, the use amount of spraying water is reduced, the alkali adding amount of absorption liquid is reduced, and the heat exchange cost is greatly reduced; polluting components in waste gas are degraded by aerobic microorganisms in nitrification liquid of the sewage treatment rear-end aerobic system, the degradation efficiency of waste gas pollutants is improved, the purposes of reducing consumption and improving efficiency are further achieved, and the problem of high operation cost of chemical waste gas treatment is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment equipment in the chemical industry, and more specifically to a pre-biological deodorization device. Background Art

[0002] Waste gas from the chemical industry includes waste gas discharged from the petrochemical industry, coal chemical industry, acid and alkali industry, fertilizer industry, plastic industry, pharmaceutical industry, dye industry, rubber industry, etc. The organic waste gas generated by the chemical industry is of many types, highly toxic, and large in quantity. Some of them are accompanied by irritating odors or even malodorous gases, and the difficulty of treatment is relatively high.

[0003] Among them, most of the waste gas emissions are irritating or corrosive. For example, sulfur dioxide, nitrogen oxides, chlorine, hydrogen fluoride and other gases are irritating or corrosive. Sulfur dioxide is the largest in terms of emissions. Sulfur dioxide gas directly harms human health, corrodes the surface of metals, buildings and sculptures, and is easily oxidized into sulfates that fall to the ground, polluting soil, forests, rivers and lakes. It is the main industrial source of air pollution. In addition, the suspended particles discharged by the chemical industry include dust, smoke, acid mist, etc., which are of various types and pose a great threat to the environment. In particular, when suspended particles and harmful gases exist at the same time, they can produce a synergistic effect, which is more harmful to humans.

[0004] At present, when treating these waste gases, waste gas adsorption is usually adopted, that is, through chemical modification of activated carbon, targeted adsorption, and reduction of external emissions. It is a low-cost waste gas treatment method that is widely used. However, since activated carbon is easily saturated, it usually needs to be replaced regularly, which makes the operating cost high and the use is relatively inconvenient. If an alkali liquid spray tower is used to convert the waste gas into wastewater and then treat the wastewater, the alkali absorption and spray water heat exchange are large, resulting in high operating costs. In addition, when using alkali liquid spraying, toxic and harmful components in the waste gas are transferred to the wastewater, which increases the wastewater treatment load and increases the difficulty of wastewater treatment. Therefore, in view of this, the existing structure is studied and improved, and a pre-biological deodorization device is provided, in order to achieve a more practical purpose. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a pre-biological deodorization device, which can utilize the nitrification liquid of the aerobic system at the back end of sewage treatment as the spray liquid, and add ball ring fillers and hollow ball fillers, thereby reducing its own pollution, reducing the amount of spray water, reducing the amount of alkali added to the absorption liquid, and greatly reducing the heat exchange cost. The aerobic microorganisms of the nitrification liquid of the aerobic system at the back end of sewage treatment are utilized to degrade the polluting components in the waste gas, and a zero-pollution and zero-cost method is adopted to improve the degradation efficiency of waste gas pollutants, thereby achieving the purpose of reducing consumption and increasing efficiency, and solving the problem of high operating costs of chemical waste gas treatment.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] A pre-biological deodorization device comprises a primary spray tower, a secondary spray tower, a tertiary spray tower, a quaternary spray tower and a defogger tower, which are connected in sequence from left to right through an exhaust pipe. The primary spray tower, the secondary spray tower, the tertiary spray tower, the quaternary spray tower and the defogger tower have the same structure and all comprise a tower body. An air outlet is provided at the top center of the tower body, an air inlet is provided at the bottom periphery of the tower body, an air distribution grid plate is fixedly connected inside the tower body, ball ring fillers and hollow ball fillers are filled inside the tower body and above the air distribution grid plate, a spray pump is installed outside the tower body, a water outlet flange of the spray pump is connected to a spray main pipe, a plurality of spray branch pipes are connected to the outer peripheral flange of the spray main pipe, one end of the spray branch pipe extends to the inside of the tower body and is provided with a plurality of non-clogging nozzles.

[0010] Furthermore, the ball ring filler is provided with three layers, and the hollow ball filler is provided with one layer, and is filled above the top layer of the ball ring filler.

[0011] Furthermore, a water outlet is also provided on the outer periphery of the bottom of the tower body.

[0012] Furthermore, an air inlet on the first-stage spray tower is installed with an air inlet pipe, and an air valve is installed inside the air inlet pipe.

[0013] Furthermore, one end of the air inlet located in the tower body is configured as a 45° oblique cut that is wider at the top and narrower at the bottom.

[0014] Furthermore, the outer periphery of the air distribution grid plate is fixedly connected to the inner wall of the tower body, and the air distribution grid plate is provided with a plurality of evenly distributed air holes with an aperture of 3 mm.

[0015] Furthermore, the air outlet flange on the demister tower is connected to an air outlet pipe.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] (1) This scheme uses the nitrification liquid of the aerobic system at the back end of sewage treatment as the spray liquid, replacing the tap water spray or alkali solution spray of the original traditional process, and converts the wastewater into a spray liquid with the same absorption effect as tap water and alkali solution, achieving the purpose of reducing consumption and increasing efficiency, greatly reducing the use of tap water and the amount of alkali added. At the same time, the nitrification liquid of the aerobic system at the back end of sewage treatment returns to the original sewage treatment system, using a large amount of sewage for self-heat exchange, with a good heat exchange effect, can be reused, and will not cause adverse effects on the sewage treatment system, thereby greatly reducing the energy consumption caused by heat exchange, thereby reducing the cost of waste gas treatment, and achieving the function of reducing consumption and increasing efficiency.

[0019] (2) This solution, by using the nitrification liquid spraying of the aerobic system at the back end of the sewage treatment, solves the problem of the traditional alkaline solution spraying that the neutralization reaction between acid and alkali is relatively violent, which easily generates a large amount of foam and is difficult to eliminate. It improves the effect of the waste gas treatment process and avoids pollution to the appearance of the equipment itself. At the same time, the nitrification liquid of the aerobic system at the back end of the sewage treatment contains a relatively high concentration of aerobic microorganisms, which can effectively degrade and adsorb organic pollutants in the waste gas, thereby reducing the subsequent waste gas treatment load and ensuring that the waste gas meets the emission standards.

[0020] (3) This scheme, by adding multiple layers of ball ring fillers and hollow ball fillers, can ensure the exhaust gas diffusion and the absorption effect of the nitrification liquid in the aerobic system at the back end of sewage treatment, thereby ensuring the exhaust gas treatment effect and improving the degradation efficiency of exhaust gas pollutants. At the same time, the use of corrosion-resistant silicon carbide non-clogging nozzles has better spraying effect, exhaust gas cooling effect and acid mist absorption effect, which can better remove pollutants in the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the position structure of the first-level spray tower of the utility model;

[0023] Figure 3 This is a schematic diagram of the position structure of the defog tower of the utility model.

[0024] Description of the numbers in the figure:

[0025] 1. First-stage spray tower;

[0026] 2. Secondary spray tower;

[0027] 3. Three-stage spray tower;

[0028] 4. Four-stage spray tower;

[0029] 5. Demisting tower;

[0030] 6. Exhaust pipe;

[0031] 7. Tower body;

[0032] 8. Exhaust port;

[0033] 9. Air inlet;

[0034] 10. Air distribution grille plate;

[0035] 11. Ball ring packing;

[0036] 12. Hollow ball filler;

[0037] 13. Spray pump;

[0038] 14. Sprinkler main pipe;

[0039] 15. Sprinkler branch pipe;

[0040] 16. No clogging of nozzles;

[0041] 17. Water outlet;

[0042] 18. Air intake duct;

[0043] 19. Air valve;

[0044] 20. Exhaust pipe. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0046] Example:

[0047] See also Figure 1-3A pre-biological deodorization device includes a primary spray tower 1, a secondary spray tower 2, a tertiary spray tower 3, a quaternary spray tower 4 and a defogger 5, which are connected from left to right through an exhaust pipe 6. The primary spray tower 1, the secondary spray tower 2, the tertiary spray tower 3, the quaternary spray tower 4 and the defogger 5 have the same structure and include a tower body 7. An air outlet 8 is provided at the top center of the tower body 7. An air inlet 9 is provided at the bottom periphery of the tower body 7. An air distribution grille plate 10 is fixedly connected to the inside of the tower body 7. The inside of the tower body 7 and the air distribution grille plate 10 are located Ball ring fillers 11 and hollow ball fillers 12 are filled above the plate 10, a spray pump 13 is installed outside the tower body 7, the outlet flange of the spray pump 13 is connected to a spray main pipe 14, the outer flange of the spray main pipe 14 is connected to a plurality of spray branches 15, one end of the spray branch 15 extends to the inside of the tower body 7, and a plurality of non-clogging nozzles 16 are installed. When in use, the non-clogging nozzle 16 is made of corrosion-resistant silicon carbide material, the spraying effect is better, the exhaust gas cooling effect and the acid mist absorption effect are better, and the pollutants in the exhaust gas can be better removed;

[0048] In addition, the nitrification liquid of the aerobic system at the back end of sewage treatment is used as the spray liquid to replace the tap water spray or alkali solution spray of the original traditional process, and the wastewater is converted into a spray liquid with the same absorption effect as tap water and alkali solution, thereby achieving the purpose of reducing consumption and increasing efficiency, and greatly reducing the use of tap water and the amount of alkali added. At the same time, the nitrification liquid of the aerobic system at the back end of sewage treatment is returned to the original sewage treatment system after use, and a large amount of sewage is used for self-heat exchange, with a good heat exchange effect, which can be repeatedly recycled and will not cause adverse effects on the sewage treatment system, thereby greatly reducing the energy consumption caused by heat exchange, and then reducing the waste gas treatment cost, achieving the function of reducing consumption and increasing efficiency. At the same time, the nitrification liquid of the aerobic system at the back end of sewage treatment contains a high concentration of aerobic microorganisms, which can well degrade and adsorb organic pollutants in waste gas, thereby reducing the subsequent waste gas treatment load and ensuring that the waste gas meets the emission standards.

[0049] See also Figure 2 The ball ring filler 11 is provided with three layers, and the hollow ball filler 12 is provided with one layer, and is filled above the top layer of the ball ring filler 11. When in use, the middle and lower three layers use the ball ring filler 11, and the top layer uses the hollow ball filler 12, which can not only ensure the diffusion of waste gas and the absorption effect of the nitrification liquid of the aerobic system at the rear end of sewage treatment, but also play a role in demisting, greatly improving the waste gas treatment effect.

[0050] See also Figure 2 A water outlet 17 is also provided on the outer periphery of the bottom of the tower body 7 .

[0051] See also Figure 2 The air inlet 9 on the first-stage spray tower 1 is equipped with an air inlet pipe 18, and an air valve 19 is installed inside the air inlet pipe 18.

[0052] See also Figure 2 One end of the air inlet 9 located in the tower body 7 is set as a 45° oblique cut that is wide at the top and narrow at the bottom, which effectively prevents the spray liquid from entering the air inlet pipe 18, preventing pipe pollution and other adverse effects.

[0053] See also Figure 2 The outer periphery of the air distribution grid plate 10 is fixedly connected to the inner wall of the tower body 7, and a number of evenly distributed pores with an aperture of 3 mm are opened on the air distribution grid plate 10, which ensures the uniform distribution and diffusion of the exhaust gas, and contributes to the uniformity of the exhaust gas treatment and its treatment effect.

[0054] See also Figure 3 The air outlet 8 on the demister tower 5 is flange-connected with an air outlet pipe 20 .

[0055] Working principle: The waste gas is passed through the air inlet pipe 18 to the first-level spray tower 1, the second-level spray tower 2, the third-level spray tower 3, the fourth-level spray tower 4 and the defogger 5 in sequence, and finally discharged from the air outlet pipe 20 of the defogger 5 to enter the subsequent waste gas treatment process. After the waste gas enters the tower body 7, the nitrification liquid of the aerobic system of the sewage treatment back end is transported to the tower body 7 through the spray main pipe 14 and the spray branch pipe 15 by the spray pump 13, and sprayed out by the non-clogging nozzle 16 to treat the waste gas. At the same time, the nitrification liquid of the aerobic system of the sewage treatment back end is used up. After completion, it returns to the original sewage treatment system and uses a large amount of sewage for self-heat exchange, with better heat exchange effect. It can be recycled and reused without causing adverse effects on the sewage treatment system, thereby greatly reducing the energy consumption caused by heat exchange, thereby reducing the cost of waste gas treatment, and achieving the function of reducing consumption and increasing efficiency. At the same time, adding multiple layers of ball ring filler 11 and hollow ball filler 12 can ensure the diffusion of waste gas and the absorption effect of nitrification liquid in the aerobic system at the back end of sewage treatment, thereby ensuring the treatment effect of waste gas and improving the degradation efficiency of waste gas pollutants.

[0056] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A pre-biological deodorization device, comprising a primary spray tower (1), a secondary spray tower (2), a tertiary spray tower (3), a quaternary spray tower (4) and a defog tower (5), which are sequentially connected from left to right through an exhaust pipe (6), characterized in that: The first-stage spray tower (1), the second-stage spray tower (2), the third-stage spray tower (3), the fourth-stage spray tower (4) and the demisting tower (5) are all of the same structure and all comprise a tower body (7). An air outlet (8) is provided at the center of the top of the tower body (7), an air inlet (9) is provided at the outer periphery of the bottom of the tower body (7), an air distribution grid plate (10) is fixedly connected to the inside of the tower body (7), a ball ring filler (11) and a hollow ball filler (12) are filled inside the tower body (7) and above the air distribution grid plate (10), a spray pump (13) is installed outside the tower body (7), a water outlet flange of the spray pump (13) is connected to a spray main pipe (14), a peripheral flange of the spray main pipe (14) is connected to a plurality of spray branch pipes (15), one end of the spray branch pipe (15) extends to the inside of the tower body (7) and is provided with a plurality of non-clogging nozzles (16).

2. A pre-biological deodorization device according to claim 1, characterized in that: The ball ring filler (11) is provided with three layers, and the hollow ball filler (12) is provided with one layer and is filled above the top layer of the ball ring filler (11).

3. A pre-biological deodorization device according to claim 1, characterized in that: A water outlet (17) is also provided on the outer periphery of the bottom of the tower body (7).

4. A pre-biological deodorization device according to claim 1, characterized in that: An air inlet (18) is installed at the air inlet (9) on the first-stage spray tower (1), and an air valve (19) is installed inside the air inlet pipe (18).

5. A pre-biological deodorization device according to claim 1, characterized in that: One end of the air inlet (9) located in the tower body (7) is configured as a 45° oblique cut that is wider at the top and narrower at the bottom.

6. A pre-biological deodorization device according to claim 1, characterized in that: The outer periphery of the air distribution grid plate (10) is fixedly connected to the inner wall of the tower body (7), and the air distribution grid plate (10) is provided with a plurality of evenly distributed air holes with an aperture of 3 mm.

7. A pre-biological deodorization device according to claim 1, characterized in that: The air outlet (8) on the demister tower (5) is flange-connected to an air outlet pipeline (20).

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