Multistage efficient deodorization treatment system

Abstract

The utility model relates to the field of sewage treatment, and discloses a multi-stage efficient deodorization treatment system which comprises a biological tower, a chemical tower, an alkaline agent adding system, an oxidizing agent adding system, an induced draft fan, an exhaust tower, a water inlet pipe and the like. According to the invention, a biological deodorization method and a chemical oxidation deodorization method are combined, and the purpose of efficiently treating odor is achieved through multi-stage reaction and washing. When odor passes through the biological deodorization system, most of decomposable odor molecules are degraded, absorbed and utilized by microorganisms, and the non-degradable odor molecules enter the chemical deodorization system and are oxidized and decomposed under the action of a strong oxidant, so that the application range of the deodorization system is effectively widened by the multi-stage deodorization mode; the impact of acid gas or substances on the deodorization system is reduced, and the stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of odor treatment, in particular to a multi-stage high-efficiency deodorization treatment system. Technical Background

[0002] The biological filter deodorization device is currently the most studied and most commonly used method for treating malodorous gases. The treatment process is that the gas containing malodorous substances passes through the filter bed from the bottom to the top after pretreatment processes such as dust removal, humidification or cooling. When passing through the filter layer, the malodorous substances are transferred from the gas phase to the water-microorganism mixed phase (biological layer), and are decomposed by the metabolism of microorganisms attached to and growing on the filter material. This method mainly uses the biochemical action of microorganisms to decompose pollutants and convert them into harmless substances. Microorganisms use organic matter as the matrix required for their growth and reproduction. Through different transformation pathways, large molecules or complex organic matter are finally oxidized and decomposed into simple inorganic substances such as water and carbon dioxide through alienation. At the same time, through assimilation and the use of the energy generated in the alienation process, the microbial organisms are grown and reproduced, creating favorable conditions for further exerting their ability to treat organic matter. The essence of pollutant removal is that organic matter is absorbed, metabolized and utilized by microorganisms as nutrients. This process is a complex process composed of physics, chemistry, physical chemistry and biochemistry. It can be simplified as follows:

[0003] Hydrogen sulfide: H2S+202→H2SO4

[0004] Methyl mercaptan: 2CH3SH+7O2→2H2SO4+2CO2+2H2O

[0005] Thiol: (CH3)2S+5O2→H2SO4+2CO2+2H2O

[0006] Dimethyl disulfide: 2(CH3)2S2+13O2→4H2SO4+4CO2+2H2O

[0007] Ammonia: NH3+2O2→HNO3+H2O

[0008] Trimethylamine: 2(CH3)3N+13O2→2HNO3+6CO2+8H2O

[0009] As shown in the above reaction, the odor components are decomposed into carbon dioxide, water and acidic substances such as sulfuric acid and nitric acid, which has the advantages of environmental protection, high efficiency and energy saving. Biological deodorization uses the method of microbial degradation of pollutants. It does not need to add any chemical substances and will not produce secondary pollution. It is a green and environmentally friendly deodorization method. Biological deodorization has a high efficiency in degrading different types of pollutants and can quickly convert organic matter into CO2 and H2O, thereby achieving a deodorization effect. Compared with traditional physical and chemical deodorization methods, biological deodorization does not require a large amount of energy consumption. At the same time, the degraded waste is also highly recyclable, which can effectively reduce the discharge of waste.

[0010] The shortcomings of biological deodorization are mainly reflected in the following aspects: First, the gas after biological deodorization will still contain some hydrogen sulfide gas, as well as acidic substances such as sulfuric acid and nitric acid. The direct discharge of these substances will affect the environment, and the acidic substances produced during the biological deodorization process are not conducive to the survival of microorganisms themselves, resulting in low stability in actual operation and high maintenance costs. Secondly, the scope of application of biological deodorization is relatively narrow, and it cannot handle some more complex waste gases and wastewaters. Different types of pollutants require personalized treatment. Summary of the invention

[0011] In order to solve the above problems, the utility model proposes a multi-stage high-efficiency deodorization treatment system to improve the stability of the deodorization system and expand the applicable scope of odor treatment.

[0012] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multi-stage high-efficiency deodorization treatment system, comprising a biological tower (1), a chemical tower (2), an alkali agent dosing system (3), an oxidant dosing system (4), an induced draft fan (5), an exhaust tower (6), and a water inlet pipe (7), wherein a biological tower water inlet (101) is provided at a position 0.5-2 m above the bottom of the biological tower (1), a biological tower circulation water outlet (102) is provided at the bottom of the biological tower (1), and a biological tower circulation water outlet (103) is provided at the top of the biological tower (1). A biological tower circulation water inlet (103) is provided at the top of the biological tower (1), a biological tower air inlet (104) is provided at a position 0.5-1 m above the biological tower water inlet (101), a biological filter material (105) is installed above the biological tower air inlet (104) inside the biological tower (1), a biological tower exhaust port (106) is provided at the top of the biological tower (1), a biological tower discharge pipe (107) is provided at the bottom of the biological tower (1), and a chemical tower inlet (108) is provided at a position 1-2 m above the bottom of the chemical tower (2). A water inlet (201) is provided at a position 1-2 m above the chemical tower water inlet (201), a chemical tower air inlet (202) is provided, a chemical tower exhaust port (203) is provided at the top of the chemical tower (2), a chemical tower circulating water outlet (204) is provided at the bottom of the chemical tower (2), a chemical tower primary circulating water inlet (205) is provided in the middle of the chemical tower (2), a chemical tower secondary circulating water inlet (206) is provided at the top of the chemical tower (2), and a chemical tower air inlet (202) and a chemical tower air outlet (203) are provided. A primary washing filler (207) is installed between the primary circulating water inlet (205) of the chemical tower, a secondary washing filler (208) is installed between the primary circulating water inlet (205) of the chemical tower and the secondary circulating water inlet (206) of the chemical tower, a dehumidifying filler (209) is installed above the secondary circulating water inlet (206), a chemical tower discharge pipe (210) is provided at the bottom of the chemical tower (2), and an induced draft fan (5) is provided on the pipeline between the chemical tower exhaust port (203) and the exhaust tower (6).

[0013] The biotower air inlet (104) of the biotower (1) is arranged at the lower part of the biotower (1), below the biofilter (105), and the biotower circulating water inlet (103) and the biotower spray pipe (103a) are arranged at the upper part of the biotower (1), above the biofilter (105). The advantage of this is that the odor gas passes through the biofilter (105) from bottom to top, and the spray water passes through the biofilter (105) from top to bottom, and the gas and water flow form convection, which can improve the efficiency of the odor contacting with water and dissolving in the water.

[0014] The biological tower (1) is provided with a biological filter material (105) on the upper part of the interior. The biological filter material (105) is enriched with microorganisms that can decompose odor molecules and absorb their energy to maintain survival. The advantages of this are: the biological filter material (105) provides a place for the deodorizing microorganisms to attach, which can increase the density of the microorganisms and effectively prevent the microorganisms from being lost with the water flow. The odor molecules dissolved in the aqueous solution and biodegradable are adsorbed and absorbed by the microorganisms when passing through the biological filter material (105). The odor molecules are transferred from the water to the microorganisms. The odor components that enter the microbial cells are decomposed and utilized by the microorganisms as nutrients, thereby removing the pollutants.

[0015] The chemical tower (2) is made of corrosion-resistant glass fiber reinforced plastic or stainless steel. The chemical tower (2) is a cylindrical chemical reaction device. The chemical tower (2) is connected to the biological tower (1) through the chemical tower air inlet (202) and the biological tower exhaust pipe (106b). The chemical tower (2) is provided with a chemical tower primary spray pipe (205a), a chemical tower secondary spray pipe (206a), a primary washing filler (207), a secondary washing filler (208), and a dehumidification filler (209). The advantages of this are: a special structure filler with a large specific surface area is used as a mass transfer carrier and a dehydration filler, and the waste gas is washed in two stages, so that acidic odor gases such as hydrogen sulfide can be fully absorbed, harmful substances are removed, and the impact on the surrounding environment is eliminated.

[0016] The chemical tower (2) is provided with an alkali agent dosing system (3) and an oxidant agent dosing system (4) outside. The alkali agent system drug outlet pipe (302) and the oxidant system drug outlet pipe (402) are both connected to the chemical tower circulation pipe (204d). The alkali agent and the oxidant agent can enter the system through the water circulation of the chemical tower (2). The advantage of this is that the odor molecules that are difficult to decompose biologically will be oxidized and decomposed by the oxidant in the chemical tower (2), so that the odor is further removed. At the same time, the corresponding alkali agent is used as an absorption washing liquid, which is more conducive to the absorption of acidic substances generated in the biological deodorization process.

[0017] The beneficial effects of the utility model are as follows: by combining biological deodorization with chemical oxidation deodorization, and adopting multi-stage reaction and washing, the purpose of efficient odor treatment is achieved. First, when the odor passes through the first stage biological deodorization system, the microorganisms degrade and absorb most of the degradable odor molecules, and the odor molecules that cannot be degraded will enter the chemical deodorization system. Under the action of strong oxidants, the remaining odor molecules are oxidized and decomposed. This multi-stage deodorization method enhances the application scope of the deodorization system. Secondly, the acidic substances generated in the biological deodorization process are absorbed by water and react with the alkaline agent to neutralize, reducing the impact of the acidic substances on the deodorization system and improving stability. The utility model has strong practicality, high promotion value, and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a system layout diagram of the utility model.

[0019] Wherein: (1) biological tower, (101) biological tower water inlet, (101a) biological tower water inlet pipe, (101b) biological tower water inlet valve, (102) biological tower circulation water outlet, (102a) biological tower circulation water outlet valve, (102b) biological tower circulation pump, (102c) biological tower circulation pipe, (102d) biological tower circulation pipe flowmeter, (103) biological tower circulation water inlet, (103a) biological tower spray pipe, (104) biological tower air inlet, (104a) biological tower air inlet pipe, (105) biological filter material, (106) biological tower exhaust port, (106a) drying device, (106b) biological tower exhaust pipe, (107) biological tower discharge pipe, (2) chemical tower, (201) chemical tower water inlet, (201a) chemical tower water inlet pipe, (201b) chemical tower water inlet valve, (202 Chemical tower air inlet, (203) chemical tower exhaust port, (204) chemical tower circulating water outlet, (204a) chemical tower circulating water outlet valve, (204b) chemical tower circulating pump, (204c) chemical tower circulating pipe flowmeter, (204d) chemical tower circulating pipe, (205) chemical tower primary circulating water inlet, (205a) chemical tower primary spray pipe, (206) chemical tower secondary circulating water inlet, (206a) chemical tower secondary spray pipe, (207) primary washing filler, (208) secondary washing filler, (209) dehumidification filler, (3) alkali agent dosing system, (301) alkali agent system water inlet pipe, (302) alkali agent system drug outlet pipe, (4) oxidant dosing system, (401) oxidation system water inlet pipe, (402) oxidation system drug outlet pipe, (5) induced draft fan, (6) exhaust tower, (7) water supply pipe. DETAILED DESCRIPTION

[0020] In order to have a further understanding and recognition of the structural features and the effects achieved by the utility model, a preferred embodiment and accompanying drawings are used to illustrate the invention as follows:

[0021] like Figure 1As shown, a multi-stage high-efficiency deodorization treatment system comprises a biological tower (1), a chemical tower (2), an alkali agent dosing system (3), an oxidant dosing system (4), an induced draft fan (5), an exhaust tower (6), and a water inlet pipe (7). A biological tower water inlet (101) is provided at a position 0.5-2 m above the bottom of the biological tower (1), a biological tower circulation water outlet (102) is provided at the bottom of the biological tower (1), and a biological tower circulation water inlet (103) is provided at the top of the biological tower (1). 3), a biotower air inlet (104) is provided at a position 0.5-1 m above the biotower water inlet (101), a biological filter material (105) is installed above the biotower air inlet (104) inside the biotower (1), a biotower exhaust port (106) is provided at the top of the biotower (1), a biotower discharge pipe (107) is provided at the bottom of the biotower (1), a chemical tower water inlet (201) is provided at a position 1.5 m above the bottom of the chemical tower (2), A chemical tower air inlet (202) is provided 2 m above the chemical tower water inlet (201); a chemical tower exhaust port (203) is provided at the top of the chemical tower (2); a chemical tower circulating water outlet (204) is provided at the bottom of the chemical tower (2); a chemical tower primary circulating water inlet (205) is provided in the middle of the chemical tower (2); a chemical tower secondary circulating water inlet (206) is provided at the top of the chemical tower (2); and a chemical tower primary circulating water outlet (204) is provided at the bottom of the chemical tower (2). A primary washing filler (207) is installed between the water inlets (205), a secondary washing filler (208) is installed between the primary circulation water inlet (205) of the chemical tower and the secondary circulation water inlet (206) of the chemical tower, a dehumidification filler (209) is installed above the secondary circulation water inlet (206), a chemical tower discharge pipe (210) is provided at the bottom of the chemical tower (2), and an induced draft fan (5) is provided on the pipeline between the chemical tower exhaust port (203) and the exhaust tower (6).

[0022] In this embodiment, the biotower air inlet (104) of the biotower (1) is arranged at the lower part of the biotower (1), below the biofilter material (105), and the biotower circulating water inlet (103) and the biotower spray pipe (103a) are arranged at the upper part of the biotower (1), above the biofilter material (105).

[0023] In this embodiment, a biological filter material (105) is installed above the interior of the biological tower (1), and the biological filter material (105) is enriched with microorganisms that can decompose odor molecules and absorb their energy to maintain survival.

[0024] In this embodiment, the material used for the chemical tower (2) is corrosion-resistant glass fiber reinforced plastic. The chemical tower (2) is a cylindrical chemical reaction device. The chemical tower (2) is connected to the biological tower (1) through the chemical tower air inlet (202) and the biological tower exhaust pipe (106b). The chemical tower (2) is provided with a chemical tower first-level spray pipe (205a), a chemical tower second-level spray pipe (206a), a first-level washing filler (207), a second-level washing filler (208), and a dehumidification filler (209).

[0025] In this embodiment, the outside of the chemical tower (2) is equipped with an alkali agent dosing system (3) and an oxidant agent dosing system (4). The alkali agent system outlet pipe (302) and the oxidant system outlet pipe (402) are both connected to the chemical tower circulation pipe (204d). The alkali agent and the oxidant can enter the system through the water circulation of the chemical tower (2).

[0026] The deodorization system invented by the utility model has become an important technology in the field of modern environmental protection with its strong practicality, wide application field and remarkable advantages. It can not only effectively solve the odor problem and improve the environmental quality, but also has multiple advantages such as environmental protection, economy, stability and high efficiency, which is of great significance to promoting green development and sustainable development.

Claims

1. A multi-stage high-efficiency deodorization treatment system, characterized in that: The invention comprises a biological tower (1), a chemical tower (2), an alkali agent dosing system (3), an oxidant dosing system (4), an induced draft fan (5), an exhaust tower (6), and a water inlet pipe (7). A biological tower water inlet (101) is provided at a position 0.5-2 m above the bottom of the biological tower (1), a biological tower circulation water outlet (102) is provided at the bottom of the biological tower (1), a biological tower circulation water inlet (103) is provided at the top of the biological tower (1), and a water outlet (104) is provided at a position higher than the biological tower water inlet. A biological tower air inlet (104) is provided at a position 0.5-1 m above the biological tower (101), a biological filter material (105) is installed above the biological tower air inlet (104) inside the biological tower (1), a biological tower exhaust port (106) is provided at the top of the biological tower (1), a biological tower discharge pipe (107) is provided at the bottom of the biological tower (1), a chemical tower water inlet (201) is provided at a position 1-2 m above the bottom of the chemical tower (2), and a biological tower water inlet (202) is provided at the chemical tower water inlet (203). 1) A chemical tower air inlet (202) is provided at a position 1-2 m above the chemical tower (2), a chemical tower exhaust port (203) is provided at the top of the chemical tower (2), a chemical tower circulating water outlet (204) is provided at the bottom of the chemical tower (2), a chemical tower primary circulating water inlet (205) is provided in the middle of the chemical tower (2), a chemical tower secondary circulating water inlet (206) is provided at the top of the chemical tower (2), and a chemical tower air inlet (202) and a chemical tower primary circulating water inlet (206) are provided. A primary washing filler (207) is installed between the chemical tower (205), a secondary washing filler (208) is installed between the primary circulating water inlet (205) of the chemical tower and the secondary circulating water inlet (206) of the chemical tower, a dehumidification filler (209) is installed above the secondary circulating water inlet (206), a chemical tower discharge pipe (210) is provided at the bottom of the chemical tower (2), and an induced draft fan (5) is provided on the pipeline between the chemical tower exhaust port (203) and the exhaust tower (6).

2. A multi-stage high-efficiency deodorization treatment system according to claim 1, characterized in that: The biotower air inlet (104) of the biotower (1) is arranged at the lower part of the biotower (1), below the biofilter material (105); the biotower circulating water inlet (103) and the biotower spray pipe (103a) are arranged at the upper part of the biotower (1), above the biofilter material (105).

3. A multi-stage high-efficiency deodorization treatment system according to claim 1, characterized in that: A biological filter material (105) is installed above the interior of the biological tower (1), and the biological filter material (105) is enriched with microorganisms that can decompose odor molecules and absorb their energy to maintain survival.

4. A multi-stage high-efficiency deodorization treatment system according to claim 1, characterized in that: The chemical tower (2) is made of corrosion-resistant glass fiber reinforced plastic or stainless steel. The chemical tower (2) is a cylindrical chemical reaction device. The chemical tower (2) is connected to the biological tower (1) through a chemical tower air inlet (202) and a biological tower exhaust pipe (106b). The chemical tower (2) is provided with a chemical tower primary spray pipe (205a), a chemical tower secondary spray pipe (206a), a primary washing filler (207), a secondary washing filler (208), and a dehumidifying filler (209).

5. A multi-stage high-efficiency deodorization treatment system according to claim 1, characterized in that: The chemical tower (2) is provided with an alkali agent dosing system (3) and an oxidant agent dosing system (4) outside. The alkali agent system drug outlet pipe (302) and the oxidant system drug outlet pipe (402) are both connected to the chemical tower circulation pipe (204d). The alkali agent and the oxidant can enter the system through the water circulation of the chemical tower (2).

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