Waste gas treatment device for municipal sewage plant

Abstract

The utility model discloses a waste gas treatment device for a municipal sewage plant, which comprises a waste gas collection component, a pretreatment component, a purification component and a discharge component which are sequentially arranged along the processing direction, and suction fans are arranged in the waste gas collection component, the pretreatment component, the purification component and the discharge component; the waste gas collection assembly is used for being connected with a sewage treatment system of a sewage plant, collecting waste gas generated in the sewage treatment process and transferring the waste gas into the pretreatment assembly; the pretreatment assembly comprises a dust removal part, an oil removal part and a cooling part and is used for carrying out dust removal, oil removal and cooling treatment on the waste gas passing through the pretreatment assembly; the purification assembly comprises a biological filter and a catalytic filter, the biological filter or the catalytic filter is connected with an outlet of the pretreatment assembly, and an outlet of the catalytic filter or the biological filter is connected with the power assembly. The waste gas treatment device can filter and purify waste gas generated when sewage is treated by a municipal sewage plant, and pollution and harm of the municipal sewage plant to the environment are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a waste gas treatment device for a municipal sewage treatment plant. Background Art

[0002] With the continuous expansion of urban construction land, some sewage treatment plants originally located in the suburbs are gradually surrounded by the urban area, and the plant sites are getting closer and closer to the living areas of residents. The stench emitted during the transportation and treatment of sewage affects the normal life of the surrounding residents. In addition, due to the continuous improvement of people's living standards and the gradual strengthening of environmental awareness, the sewage treatment plant workers have higher and higher requirements for the quality of the working environment. Therefore, the deodorization problem of sewage treatment plants has attracted more and more attention.

[0003] During the sewage treatment process in a municipal sewage treatment plant, a large amount of waste gas containing malodorous substances and harmful gases, such as hydrogen sulfide, ammonia, methane, etc., will be generated. If these waste gases are directly discharged into the atmosphere without treatment, it will cause serious impacts on the surrounding environment and the health of residents.

[0004] Therefore, it is urgent to apply a waste gas treatment device in the municipal sewage treatment plant to filter and purify the waste gas generated during the sewage treatment process. Summary of the Invention

[0005] The purpose of the utility model is to provide a waste gas treatment device for a municipal sewage treatment plant, which can filter and purify the waste gas generated when the municipal sewage treatment plant treats sewage, and reduce the pollution and harm of the municipal sewage treatment plant to the environment.

[0006] In order to achieve the above purpose, a waste gas treatment device for a municipal sewage treatment plant provided by the utility model has the following specific implementation schemes:

[0007] A waste gas treatment device for a municipal sewage treatment plant includes an exhaust gas collection component, a pretreatment component, a purification component, and an emission component arranged in sequence along the processing direction, and exhaust fans are provided in the exhaust gas collection component, the pretreatment component, the purification component, and the emission component;

[0008] Among them, the exhaust gas collection component is used to connect with the sewage treatment system of the sewage treatment plant, collect the waste gas generated during the sewage treatment process and transfer it to the pretreatment component;

[0009] Among them, the pretreatment component includes a dust removal part, an oil removal part, and a temperature reduction part, and is used for dust removal, oil removal, and temperature reduction treatment of the waste gas passing through the pretreatment component;

[0010] Among them, the purification component includes a biological filter and a catalytic filter, and the biological filter or the catalytic filter is connected to the outlet of the pretreatment component.

[0011] An exhaust gas treatment device for a municipal sewage treatment plant of the present utility model, compared with the prior art, collects the exhaust gas generated during sewage treatment in the municipal sewage treatment plant through an exhaust gas collection device. The pretreatment assembly performs preliminary dust removal, oil removal, and temperature reduction on the exhaust gas, reducing the load on the subsequent purification assembly. Then, the biological filter and catalytic filter of the purification assembly are used to filter and purify the pretreated exhaust gas. During the whole process, the suction fan drives the flow of the exhaust gas, and the gas that has been purified and filtered to meet the emission standards is discharged from the discharge assembly into the air, reducing the pollution and harm of the exhaust gas generated during sewage treatment in the municipal sewage treatment plant to the environment.

[0012] In some embodiments, the purification assembly includes a first box body and a second box body. The biological filter is formed inside the first box body. A spray pipe is installed at a position above the biological filter in the first box body, and the spray openings of the spray pipe face the biological filter for spraying biological fillers into the biological filter.

[0013] By spraying biological fillers into the biological filter through the spray pipe, the organic components in the exhaust gas are degraded, and the malodorous and harmful substances are purified.

[0014] In some embodiments, the catalytic filter is in the second box body, and a heating element is provided on the inner wall or outer wall of the second box body, and the heating temperature of the heating element is 250°C to 300°C.

[0015] By using the heating element to heat and cooperate with the catalyst in the catalytic filter to react with the organic substances in the air to be oxidized into harmless substances, the purification and filtration of the exhaust gas are further realized.

[0016] In some embodiments, the exhaust gas collection assembly includes a first cover body, a second cover body, and a fume hood. The first cover body is connected to the sewage treatment system of the sewage treatment plant to collect the exhaust gas generated during sewage treatment. The second cover body is connected to the first cover body and the fume hood, and the fume hood is connected to the pretreatment assembly. The second cover body is used to transfer the exhaust gas collected by the first cover body into the fume hood.

[0017] By adopting the structure of the first cover body, the second cover body, and the fume hood, it is ensured that under the cooperation of the suction fan, the exhaust gas generated during sewage treatment can be collected and transferred into the pretreatment assembly as much as possible, improving the effect of exhaust gas filtration and purification.

[0018] In some of these embodiments, the dust removal part includes a dust removal box, the inlet of the dust removal box is connected to the outlet of the fume hood; and in the dust removal box, there are a fogging pipe, a filter screen, and filter cotton arranged in sequence from the inlet to the outlet. The fogging pipe is used to output water mist into the dust removal box to dissolve the dust in the waste gas, the filter screen is used to block large particle impurities in the waste gas, and the filter cotton blocks tiny impurities in the waste gas and absorbs the moisture in the waste gas.

[0019] By using the fogging pipe to output water mist to dissolve the dust in the waste gas, and using the cooperation of the filter screen and filter cotton to achieve dust removal of the waste gas, it is avoided that the dust affects the purification effect of the purification component.

[0020] In some of these embodiments, the oil removal part includes an oil removal tank, the inlet of the oil removal tank is connected to the outlet of the dust removal box; and an oil removal part is arranged in the oil removal tank, and a spiral oil removal air duct is arranged in the oil removal part.

[0021] By using the oil removal part arranged in the oil removal tank, and a spiral oil removal air duct is arranged in the oil removal part. When the waste gas enters the oil removal air duct, the gas collides with the inner wall of the spiral oil removal air duct, and the small oil droplets adhere to the inner wall of the oil removal air duct, realizing oil removal of the waste gas. Then, when the small oil droplets become larger in volume, they drip from the outlet of the spiral oil removal air duct and are recovered by the box body, avoiding affecting the subsequent oil removal of the waste gas.

[0022] In some of these embodiments, the temperature reduction part includes a temperature reduction box, the inlet of the temperature reduction box is connected to the outlet of the oil removal tank, and the outlet of the temperature reduction box is connected to the inlet of the biological filter or catalytic filter of the purification component; and a condensing pipe is arranged in the temperature reduction box, and the condensing pipe is used to reduce the temperature of the waste gas passing through the temperature reduction box.

[0023] By using the condensing pipe arranged in the temperature reduction box to reduce the temperature of the waste gas, it is avoided to cause thermal damage to the subsequent purification component and improve the filtration and purification efficiency of the purification component.

[0024] In some of these embodiments, the discharge component is a discharge chimney, and the inlet of the discharge chimney is connected to the outlet of the purification component.

[0025] In some of these embodiments, at the inlet position of the discharge chimney, there are a tee pipe and a compliance detection sensor. One end of the tee pipe is connected to the inlet of the purification component, one end is connected to the outlet of the purification component, and one end is connected to the inlet of the chimney. Control valves are arranged at both ends of the tee pipe connected to the inlet of the purification component and the end connected to the inlet of the chimney. Both the control valve and the compliance detection sensor are electrically connected or communicatively connected to an external controller.

[0026] The compliance detection sensor and the control valve are both electrically connected or communicatively connected to an external controller. The three-way pipe connects the outlet of the purification assembly, the inlet of the purification assembly, and the inlet of the chimney, ensuring that the gas discharged through the chimney meets the emission standards. The unqualified gas returns to the purification assembly for filtration and purification, improving the purification effect of the waste gas.

[0027] Based on the above technical solution, compared with the prior art, the present utility model has the following beneficial effects:

[0028] By using an exhaust gas collection device to collect the exhaust gas generated during the sewage treatment in a municipal sewage treatment plant, the pretreatment assembly performs preliminary dust removal, oil removal, and temperature reduction on the exhaust gas, reducing the load on the subsequent purification assembly. Then, the biological filter and catalytic filter of the purification assembly are used to filter and purify the pretreated exhaust gas. During the whole process, the suction fan drives the flow of the exhaust gas, and the gas that has been purified and filtered to meet the emission standards is discharged into the air from the discharge assembly, reducing the pollution and harm of the exhaust gas generated during the sewage treatment in the municipal sewage treatment plant to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic flow diagram of the present utility model;

[0030] Figure 2 is a schematic diagram of the pretreatment assembly of the present utility model;

[0031] Figure 3 is a schematic diagram of the purification assembly of the present utility model.

[0032] DESCRIPTION OF THE REFERENCE NUMERALS:

[0033] 100, exhaust gas collection assembly; 110, first housing; 120, second housing; 130, fume hood; 200, pretreatment assembly; 210, dust removal box; 211, atomizing pipe; 212, filter screen, 213, filter cotton; 220, oil removal tank; 221, oil removal part; 222, oil removal air duct; 230, temperature reduction box; 231, condensing pipe; 300, purification assembly; 310, first box body; 311, biological filter; 312, spray pipe; 320, second box body; 321, catalytic filter; 322, heating part; 400, chimney; 500, three-way pipe; 510, control valve; 600, compliance detection sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] To facilitate the understanding of the present utility model, the specific embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings of the specification.

[0035] Unless otherwise specified or defined, the "first, second..." used herein is only for differentiating names and does not represent a specific quantity or order.

[0036] Unless otherwise specified or defined, the term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0037] It should be noted that in this text, "fixed to" and "connected to" can be directly fixed or connected to an element, or indirectly fixed or connected to an element.

[0038] As Figures 1-3 shown, an exhaust gas treatment device for a municipal sewage treatment plant provided in this embodiment includes an exhaust gas collection component, a pretreatment component, a purification component, and an emission component arranged in sequence along the processing direction. Exhaust gas fans are provided in the exhaust gas collection component, the pretreatment component, the purification component, and the emission component.

[0039] Among them, the exhaust gas collection component is used to connect to the sewage treatment system of the sewage treatment plant, collect the exhaust gas generated during the sewage treatment process, and transfer it to the pretreatment component.

[0040] Among them, the pretreatment component includes a dust removal part, an oil removal part, and a temperature reduction part, which are used to perform dust removal, oil removal, and temperature reduction treatment on the exhaust gas passing through the pretreatment component.

[0041] Among them, the purification component includes a biological filter and a catalytic filter, and the biological filter or the catalytic filter is connected to the outlet of the pretreatment component.

[0042] In some embodiments, the purification component includes a first box body and a second box body. The biological filter is formed inside the first box body. A spray pipe is erected at a position above the biological filter in the first box body. The spray openings of the spray pipe face the biological filter and are used to spray biological fillers into the biological filter.

[0043] By spraying biological fillers into the biological filter through the spray pipe, the organic components in the exhaust gas are degraded, and the malodorous and harmful substances are purified.

[0044] In some embodiments, the catalytic filter is provided in the second box body, and a heating element is provided on the inner wall or the outer wall of the second box body. The heating temperature of the heating element is 250°C to 300°C.

[0045] By using the heating element to heat and cooperating with the catalyst in the catalytic filter to react with the organic matter in the air to be oxidized into harmless substances, the purification and filtration of the exhaust gas are further realized.

[0046] In some of these embodiments, the exhaust gas collection assembly includes a first hood, a second hood, and a fume hood. The first hood is connected to the sewage treatment system of the sewage treatment plant to collect the exhaust gas generated during the sewage treatment process. The second hood is connected to the first hood and the fume hood, and the fume hood is connected to the pretreatment assembly. The second hood is used to transfer the exhaust gas collected by the first hood into the fume hood.

[0047] By adopting the structure of the first hood, the second hood, and the fume hood, it is ensured that under the cooperative action of the suction fan, the exhaust gas generated during the sewage treatment process can be collected and transferred into the pretreatment assembly as much as possible, improving the effect of exhaust gas filtration and purification.

[0048] In some of these embodiments, the dust removal part includes a dust removal box. The inlet of the dust removal box is connected to the outlet of the fume hood. And in the dust removal box, there are arranged a mist pipe, a filter screen, and filter cotton in sequence from the inlet to the outlet. The mist pipe is used to output water mist into the dust removal box to dissolve the dust in the exhaust gas. The filter screen is used to block large particle impurities in the exhaust gas, and the filter cotton blocks tiny impurities in the exhaust gas and absorbs the moisture in the exhaust gas.

[0049] By using the mist pipe to output water mist to dissolve the dust in the exhaust gas, and adopting the cooperation of the filter screen and the filter cotton to achieve dust removal of the exhaust gas, it is avoided that the dust affects the purification effect of the purification assembly.

[0050] In some of these embodiments, the oil removal part includes an oil removal tank. The inlet of the oil removal tank is connected to the outlet of the dust removal box. And an oil removal part is arranged in the oil removal tank, and a spiral oil removal air duct is arranged in the oil removal part.

[0051] By adopting the oil removal part arranged in the oil removal tank, and a spiral oil removal air duct is arranged in the oil removal part. When the exhaust gas enters the oil removal air duct, the gas collides with the inner wall of the spiral oil removal air duct, and the small oil droplets adhere to the inner wall of the oil removal air duct, realizing oil removal of the exhaust gas. And when the small oil droplets become larger in volume, they drip from the outlet of the spiral oil removal air duct and are recovered by the box body, avoiding affecting the subsequent oil removal of the exhaust gas.

[0052] When the small oil droplets become larger in volume and drip from the outlet of the spiral oil removal air duct and are recovered by the box body, only a collection tank needs to be arranged in the oil removal tank, and the inlet of the collection tank is located below the outlet of the oil removal air duct, which will not be elaborated here.

[0053] In some of these embodiments, the temperature reduction part includes a temperature reduction box. The inlet of the temperature reduction box is connected to the outlet of the oil removal tank, and the outlet of the temperature reduction box is connected to the inlet of the biological filter or catalytic filter of the purification assembly. And a condensation pipe is arranged in the temperature reduction box, and the condensation pipe is used to reduce the temperature of the exhaust gas passing through the temperature reduction box.

[0054] By using the condenser pipe arranged in the cooling box to reduce the temperature of the waste gas, heat damage to the subsequent purification components is avoided, and the filtering and purification efficiency of the purification components is improved.

[0055] In some embodiments, the discharge component is a discharge chimney, and the inlet of the discharge chimney is connected to the outlet of the purification component.

[0056] In some embodiments, a tee and a compliance detection sensor are provided at the inlet position of the discharge chimney. One end of the tee is connected to the inlet of the purification component, one end is connected to the outlet of the purification component, and one end is connected to the inlet of the chimney. Control valves are provided at both the end of the tee connected to the inlet of the purification component and the end connected to the inlet of the chimney. Both the control valve and the compliance detection sensor are electrically connected or communicatively connected to an external controller.

[0057] By the fact that both the compliance detection sensor and the control valve are electrically connected or communicatively connected to an external controller, the tee realizes the connection of the outlet of the purification component, the inlet of the purification component, and the inlet of the chimney, ensuring that the gas discharged through the chimney meets the emission standards. The non-compliant gas returns to the purification component for filtering and purification again, improving the purification effect of the waste gas.

[0058] The waste gas treatment device for a municipal sewage treatment plant provided in this embodiment, compared with the prior art, collects the waste gas generated by the municipal sewage treatment plant during sewage treatment through a waste gas collection device. The pretreatment component performs preliminary dust removal, oil removal, and temperature reduction on the waste gas, reducing the load on the subsequent purification component. Then, the biological filter and catalytic filter of the purification component are used to filter and purify the pretreated waste gas. During the whole process, the suction fan drives the flow of the waste gas, and the gas that has been purified and filtered to meet the emission standards is discharged into the air from the discharge component, reducing the pollution and harm of the waste gas generated during the sewage treatment of the municipal sewage treatment plant to the environment.

[0059] According to the disclosure and teachings of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. An exhaust gas treatment device for a municipal sewage treatment plant, characterized in that, It includes an exhaust gas collection component, a pretreatment component, a purification component, and an emission component arranged in sequence along the processing direction. Exhaust gas fans are provided in the exhaust gas collection component, the pretreatment component, the purification component, and the emission component. Among them, the exhaust gas collection component is used to connect with the sewage treatment system of the sewage treatment plant, collect the exhaust gas generated during the sewage treatment process, and transfer it into the pretreatment component. Among them, the pretreatment component includes a dust removal part, an oil removal part, and a temperature reduction part, which are used to perform dust removal, oil removal, and temperature reduction treatment on the exhaust gas passing through the pretreatment component. Among them, the purification component includes a biological filter and a catalytic filter, and the biological filter or the catalytic filter is connected to the outlet of the pretreatment component.

2. The waste gas treatment device for a municipal sewage treatment plant according to claim 1, characterized in that, The purification component includes a first box body and a second box body. The biological filter is formed inside the first box body. A spray pipe is erected at a position above the biological filter in the first box body. The spray nozzles of the spray pipe face the biological filter and are used to spray biological fillers into the biological filter.

3. The waste gas treatment device for a municipal sewage treatment plant according to claim 2, wherein, There is a catalytic filter in the second box body, and a heating element is provided on the inner wall or outer wall of the second box body. The heating temperature of the heating element is 250°C to 300°C.

4. The waste gas treatment device for a municipal sewage treatment plant according to any one of claims 1 to 3, characterized in that, The exhaust gas collection component includes a first cover body, a second cover body, and a fume hood. The first cover body is connected to the sewage treatment system of the sewage treatment plant to collect the exhaust gas generated during the sewage treatment process. The second cover body is connected to the first cover body and the fume hood. The fume hood is connected to the pretreatment component. The second cover body is used to transfer the exhaust gas collected by the first cover body into the fume hood.

5. The waste gas treatment device for a municipal sewage treatment plant according to claim 4, characterized in that, The dust removal part includes a dust removal box. The inlet of the dust removal box is connected to the outlet of the fume hood. And in the dust removal box, an atomizing pipe, a filter screen, and filter cotton are arranged in sequence from the inlet to the outlet. The atomizing pipe is used to output water mist into the dust removal box to dissolve the dust in the exhaust gas. The filter screen is used to block large particle impurities in the exhaust gas. The filter cotton blocks tiny impurities in the exhaust gas and absorbs the moisture in the exhaust gas.

6. The waste gas treatment device for a municipal sewage treatment plant according to claim 5, characterized in that, The oil removal part includes an oil removal tank. The inlet of the oil removal tank is connected to the outlet of the dust removal box. And an oil removal part is arranged in the oil removal tank. A spiral oil removal air duct is arranged in the oil removal part.

7. The exhaust gas treatment device for a municipal sewage treatment plant according to claim 6, characterized in that, The temperature reduction part includes a temperature reduction box. The inlet of the temperature reduction box is connected to the outlet of the oil removal tank. The outlet of the temperature reduction box is connected to the inlet of the biological filter or the catalytic filter of the purification component. And a condensing pipe is arranged in the temperature reduction box. The condensing pipe is used to reduce the temperature of the exhaust gas passing through the temperature reduction box.

8. The exhaust gas treatment device for a municipal sewage treatment plant according to any one of claims 1 to 3, characterized in that, The emission component is an emission chimney. The inlet of the emission chimney is connected to the outlet of the purification component.

9. The exhaust gas treatment device for a municipal sewage treatment plant according to claim 8, wherein, A three-way pipe and a compliance detection sensor are provided at the inlet position of the emission chimney. One end of the three-way pipe is connected to the inlet of the purification component, one end is connected to the outlet of the purification component, and one end is connected to the inlet of the chimney. Control valves are arranged at both ends of the three-way pipe connected to the inlet of the purification component and the inlet of the chimney. Both the control valve and the compliance detection sensor are electrically connected or communicatively connected to an external controller.

Images