Municipal waste compression station stink treatment system

Abstract

The invention relates to an odor treatment system for a municipal waste compression station. The odor treatment system comprises a control module, an online monitoring module, a gas collection module and a gas purification module. And online monitoring modules are arranged in the compression station and at the gas discharge port. The gas purification module comprises a free radical oxidation reaction device and a chemical washing device, an inlet of the gas collection module is formed in the lower middle area and the top of the compression station, and an outlet of the gas collection module, the free radical oxidation reaction device and the chemical washing device are sequentially communicated. The control module is used for acquiring monitoring data of the on-line monitoring module and controlling the power of the gas collection module and the free radical oxidation reaction device and the pH value of a washing solution in the chemical washing device in real time according to the monitoring data. The system couples free radical oxidation with a chemical absorption purification process by using an all-dimensional three-dimensional collection mode according to the intensity of a malodorous source and the component change of the garbage compression station, and solves the problems of incomplete collection of malodorous gas and low matching degree of the purification process.

Description

Technical Field

[0001] The invention relates to the technical field of environmental treatment, and in particular to an odor treatment system for a city garbage compression station. Background Art

[0002] Urban garbage compression stations are used to compress and reduce the volume of loose garbage collected by garbage collection trucks. They undertake the garbage collection work at the front end and also provide pretreatment for the transfer work at the back end. However, odor pollution is one of the biggest impacts of garbage compression stations on the surrounding environment. Urban garbage compression stations are different from general industrial and mining enterprises. They are mostly built in mixed commercial and residential areas in the city center. Due to the different timeliness of garbage collection and treatment, various garbage are mixed together to cause a strong odor. This odor is complex and lacks regularity. With the development of cities, the odor pollution problem of urban garbage compression stations has become increasingly prominent, seriously affecting the overall image of the city and the living environment.

[0003] At present, the existing garbage compression stations mostly use deodorizing spray technology. Most of them use masking deodorants to emit pleasant aroma components that mix with odor components to offset each other, thereby reducing the odor stimulation of odorous substances, but they cannot eliminate odorous components. Odorous components actually exist and are still harmful to the human body. The amount of odorous substances released in the garbage compression station varies. The existing treatment process system can only start and stop the deodorization process according to the set time, and the deodorization working conditions cannot adapt to the changes in the station environment and make timely adjustments. At the same time, the odor of the garbage compression station is collected through a closed space and a single pipeline, resulting in insufficient ventilation times in the compression station space, poor working environment, and the odorous gas in the lower and middle parts of the station space cannot be effectively collected, which easily leads to the escape of odorous gas, forming an unorganized pollution source and affecting the surrounding environment. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an odor treatment system for a city garbage compression station.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned object, the odor treatment system of the urban garbage compression station of the present invention comprises a control module and an online monitoring module, a gas collection module and a gas purification module connected to the control module;

[0008] The online monitoring module is provided in the compression station and at the gas discharge port of the compression station, and is used to monitor the odor concentration of the malodorous gas and the concentration of ammonia and hydrogen sulfide gas in the malodorous gas;

[0009] The gas purification module includes a free radical oxidation reaction device and a chemical washing device, the inlet of the gas collection module is arranged in the middle and lower area and the top of the compression station, and the outlet of the gas collection module, the free radical oxidation reaction device and the chemical washing device are connected in sequence;

[0010] The control module is used to obtain the monitoring data of the online monitoring module, and to control the power of the gas collection module and the free radical oxidation reaction device and the pH value of the washing liquid in the chemical washing device in real time according to the monitoring data.

[0011] Optionally, the malodorous gas is treated by the free radical oxidation reaction device, and the malodorous substances in the malodorous gas are decomposed by free radical oxidation to produce oxygen, carbon dioxide, water, nitrogen oxides, sulfur oxides and intermediate products; wherein the nitrogen oxides, sulfur oxides and incompletely decomposed intermediate products then enter the chemical washing device to be further absorbed and purified.

[0012] Optionally, the control module analyzes the source strength of the malodorous gas and the change in the percentage of ammonia gas and hydrogen sulfide gas according to the monitoring data of the online monitoring module, and then adjusts the operating parameters of the gas purification module;

[0013] Wherein, the operating parameters include the power of the free radical reaction device and the pH value of the washing liquid in the chemical washing device.

[0014] Optionally, before the operation of the odor treatment system for the urban garbage compression station, the upper and lower limit range values ​​of the odor concentration of the odorous gas are preset in the control module;

[0015] When the line monitoring module measures that the odor concentration of the malodorous gas is less than a preset lower limit, reducing the power of the free radical reaction device;

[0016] When the line monitoring module measures that the odor concentration of the malodorous gas is greater than a preset upper limit, increasing the power of the free radical reaction device;

[0017] When the control module analyzes that the percentage of ammonia gas is greater than the percentage of hydrogen sulfide gas, adjusting the washing liquid in the chemical washing device to be acidic;

[0018] When the control module analyzes that the percentage of ammonia gas is less than the percentage of hydrogen sulfide gas, the washing liquid in the chemical washing device is adjusted to be alkaline.

[0019] Optionally, when the odor concentration of the malodorous gas is 50,000 or above, the free radical reaction device is operated at 0.03w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device has a liquid-gas ratio of 3L / m3 Perform chemical washing treatment;

[0020] When the odor concentration of the malodorous gas is 10000-50000, the free radical reaction device is 0.02w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device has a liquid-gas ratio of 2.5L / m 3 Perform chemical washing treatment;

[0021] When the odor concentration of the malodorous gas is 5000-10000, the free radical reaction device is 0.01w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device has a liquid-gas ratio of 2L / m 3 Perform chemical washing treatment;

[0022] When the odor concentration of the malodorous gas is less than 5000, the free radical reaction device is 0.005w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device has a liquid-gas ratio of 1L / m 3 Perform chemical cleaning.

[0023] Optionally, the gas collection module includes a variable frequency fan, a gas collecting main pipe, and a plurality of first gas collecting branch pipes and a plurality of second gas collecting branch pipes connected to the gas collecting main pipe, the inlet of the variable frequency fan is connected to the gas collecting main pipe, and the outlet of the variable frequency fan is connected to the free radical oxidation reaction device;

[0024] The inlets of the first gas collecting branch pipes are all arranged at the middle and lower positions of the inner space of the compression station, and the inlets of the second gas collecting branch pipes are all arranged at the top of the inner space of the compression station.

[0025] Optionally, the first gas collecting branch pipes are all arranged on the inner wall of the first side wall of the compression station, the first side wall is opposite to the entrance and exit of the compression station, and the entrances of the first gas collecting branch pipes are all facing the entrance and exit of the compression station.

[0026] Optionally, the second gas collecting branch pipe is provided with a plurality of inlets opening downward.

[0027] Optionally, the variable frequency fan is connected to the control module, and the upper and lower limits of the odor concentration of the malodorous gas and the corresponding power value of the variable frequency fan are preset in the control module. When the line monitoring module measures that the odor concentration of the malodorous gas is less than the preset lower limit, the frequency of the variable frequency fan is reduced and the collected air volume is reduced; when the line monitoring module measures that the odor concentration of the malodorous gas is greater than the preset upper limit, the frequency of the variable frequency fan is increased and the collected air volume is increased.

[0028] Optionally, when the odor concentration of the malodorous gas is 50,000 or above, the air intake volume is 1500-2500m 3 / h for collection;

[0029] When the odor concentration of the malodorous gas is 10000-50000, the air intake volume is 1000-1500m 3 / h for collection;

[0030] When the odor concentration of the malodorous gas is 5000-10000, the air intake volume is 800-1200m 3 / h for collection;

[0031] When the odor concentration of the malodorous gas is less than 5000, the air volume is 1000m 3 / h for collection.

[0032] (III) Beneficial effects

[0033] The outlet of the gas collection module, the free radical oxidation reaction device and the chemical washing device are connected in sequence. The gas collected by the gas collection module is processed by the free radical oxidation reaction device and then absorbed and processed by the chemical washing device before being discharged, thereby achieving pollution-free discharge.

[0034] Based on the changes in the intensity and composition of the odor source in garbage compression stations, this system uses an all-round three-dimensional collection method to couple free radical oxidation with chemical absorption purification technology to solve the current problems of incomplete collection of odorous gases in urban garbage compression stations and low matching of odor purification processes, improve the overall image of the city and the living environment, and realize intelligent management of odor pollution in urban garbage compression stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the odor treatment system for a city garbage compression station according to the present invention;

[0036] Figure 2 This is a schematic diagram of the installation of a gas collection module of the odor treatment system of a city garbage compression station of the present invention;

[0037] Figure 3 It is a structural schematic diagram of the gas collection module of the odor treatment system of the urban garbage compression station of the present invention.

[0038] [Description of Reference Numerals]

[0039] 1: Control module; 2: Online monitoring module; 3: Free radical oxidation reaction device; 4: Chemical washing device;

[0040] 50: gas collecting main pipe; 51: first gas collecting branch pipe; 52: second gas collecting branch pipe. DETAILED DESCRIPTION

[0041] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific embodiments. Figure 1 The orientation is used as a reference.

[0042] Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0043] like Figure 1 As shown, the present invention provides an odor control system for a city garbage compression station, which is used to collect and treat odorous gases in the compression station before discharge, so as to prevent the odorous gases from escaping and forming unorganized pollution sources, thereby affecting the surrounding environment.

[0044] The odor treatment system of the urban garbage compression station includes a control module 1 and an online monitoring module 2, a gas collection module and a gas purification module connected to the control module 1. The three module terminals are uniformly regulated and controlled by the control module 1. The control module 1 adopts a conventional circuit structure / integrated chip. This application does not improve the circuit structure / chip of the control module 1. The control module 1 has a communication interface for receiving data collected by the monitoring sensor of the online monitoring module 2 and an output control interface connected to the above modules. The feedback monitoring data is analyzed and processed within a certain period, and corresponding control instructions are sent to each module terminal according to the processing results.

[0045] An online monitoring module 2 is provided in the compression station and at the gas discharge port of the compression station to monitor the compression station all day, and obtain the concentration of malodorous gas in the compression station and at the discharge port all day, as well as the concentration of ammonia and hydrogen sulfide gas in the malodorous gas. The gas purification module includes a free radical oxidation reaction device 3 and a chemical washing device 4. The inlet of the gas collection module is arranged in the middle and lower area and the top of the compression station. The density of sulfur-containing malodorous gases such as hydrogen sulfide in the malodorous pollutants is greater than that of air, and will gather in the middle and lower area of ​​the compression station space. This application adopts a full-range collection process of top gas collection and back gas collection to ensure the effective collection of gas in the middle and lower part of the space. In addition, a filter screen for filtering particulate matter in the air is provided at the collection port to prevent particulate matter and other debris from entering the treatment system. The outlet of the gas collection module, the free radical oxidation reaction device 3 and the chemical washing device 4 are connected in sequence. The gas collected by the gas collection module is treated by the free radical oxidation reaction device 3 and then absorbed and treated by the chemical washing device 4 before being discharged, so as to achieve pollution-free discharge. The control module 1 is used to obtain and analyze the monitoring data of the online monitoring module 2. The monitoring data includes the odor concentration, ammonia concentration, and hydrogen sulfide gas concentration in the compression station and at the discharge port. The power of the gas collection module and the free radical oxidation reaction device 3 and the pH value of the washing liquid in the chemical washing device 4 are controlled in real time according to the monitoring data. When any one of the odor concentration, ammonia concentration, and hydrogen sulfide gas concentration at the discharge port exceeds the emission standard, it means that the gas treatment is unqualified and needs to be repaired.

[0046] This application uses an all-round three-dimensional collection method based on the changes in the intensity and composition of the odor source in garbage compression stations, couples free radical oxidation with chemical absorption purification technology, and solves the current problems of incomplete collection of odorous gases in urban garbage compression stations and low matching degree of odor purification processes, improves the overall image of the city and the living environment, and realizes intelligent management of odor pollution in urban garbage compression stations.

[0047] In the gas purification module, the malodorous gas is treated by the free radical oxidation reaction device 3, and the malodorous substances in the malodorous gas are decomposed by free radical oxidation to produce oxygen, carbon dioxide, water, nitrogen oxides, sulfur oxides and intermediate products; among them, nitrogen oxides, sulfur oxides and incompletely decomposed intermediate products enter the chemical washing device 4 for further absorption and purification. The control module 1 analyzes the source strength of the malodorous gas and the change in the percentage of ammonia and hydrogen sulfide gas based on the monitoring data of the online monitoring module 2, and then adjusts the operating parameters of the gas purification module; among them, the operating parameters include the power of the free radical reaction device and the pH value of the washing liquid in the chemical washing device 4, which improves the processing efficiency while reducing the system energy consumption, and realizes energy saving and emission reduction. The gas purification module couples the free radical oxidation with the washing tower process to achieve the purpose of purifying malodorous gas and meeting emission standards.

[0048] Before the system is operated, the upper and lower limits of the odor concentration of the malodorous gas are preset in the control module 1. When the line monitoring module measures that the odor concentration of the malodorous gas is less than the preset lower limit, the power of the free radical reaction device is controlled to be reduced, the processing load is reduced, and the energy consumption is reduced; when the line monitoring module measures that the odor concentration of the malodorous gas is greater than the preset upper limit, the power of the free radical reaction device is controlled to be increased, the processing load is increased, and the malodorous gas is not completely treated. The control module 1 adjusts the acidity and alkalinity of the washing liquid according to the proportion of ammonia and hydrogen sulfide gas. When the control module 1 analyzes that the percentage of ammonia is greater than the percentage of hydrogen sulfide gas, the washing liquid in the chemical washing device 4 is adjusted to acidity; when the control module 1 analyzes that the percentage of ammonia is less than the percentage of hydrogen sulfide gas, the washing liquid in the chemical washing device 4 is adjusted to alkalinity. Preferably, the chemical washing device 4 is preferably a spray tower, and the free radical reaction device adopts a plasma free radical oxidation process. Other ways of generating free radicals can also be used as an alternative, such as ozone, photocatalytic oxidation, etc. Through the data feedback of the online monitoring module 2, the working conditions of the collection and purification modules are intelligently adjusted to realize the coupling and intelligent control of free radical oxidation and chemical washing absorption processes in the field of odor pollution control in urban garbage compression stations.

[0049] A specific implementation method:

[0050] When the odor concentration of the malodorous gas is 50,000 or above, the free radical reaction device is 0.03w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device 4 has a liquid-gas ratio of 3L / m 3 Perform chemical washing treatment;

[0051] When the odor concentration of the malodorous gas is 10000-50000, the free radical reaction device is 0.02w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device 4 has a liquid-gas ratio of 2.5L / m 3 Perform chemical washing treatment;

[0052] When the odor concentration of the malodorous gas is 5000-10000, the free radical reaction device is 0.01w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device 4 has a liquid-gas ratio of 2L / m 3 Perform chemical washing treatment;

[0053] When the odor concentration of the malodorous gas is less than 5000, the free radical reaction device is 0.005w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device 4 has a liquid-gas ratio of 1L / m 3 Perform chemical cleaning.

[0054] The selected values ​​are all optimal values, and the corresponding selected values ​​can be adjusted according to the processing situation.

[0055] The gas collection module includes a variable frequency fan, a gas collecting main pipe 50, and a plurality of first gas collecting branch pipes 51 and a plurality of second gas collecting branch pipes 52 connected to the gas collecting main pipe 50. The inlet of the variable frequency fan is connected to the gas collecting main pipe 50, and the outlet of the variable frequency fan is connected to the free radical oxidation reaction device 3. Figure 2 As shown, the inlets of the multiple first gas collecting branch pipes 51 are all arranged at the middle and lower positions of the internal space of the compression station, and the inlets of the multiple second gas collecting branch pipes 52 are all arranged at the top of the internal space of the compression station, forming an all-round collection process combining top gas collection and back gas collection, thereby ensuring the effective collection of gas in the middle and lower part of the space.

[0056] Furthermore, if Figure 3 As shown, a plurality of first gas collecting branch pipes 51 are all arranged on the inner wall of the first side wall of the compression station, the first side wall is opposite to the entrance and exit of the compression station, and the entrances of the plurality of first gas collecting branch pipes 51 are all facing the entrance and exit of the compression station. A plurality of inlets opening downward are arranged on the second gas collecting branch pipe 52. The internal air pressure of the garbage compression station is always maintained in a slightly negative pressure state, ensuring that the malodorous gas of the garbage compression station will not escape to the outside.

[0057] The variable frequency fan is connected to the control module 1. Under the action of the control module 1, the gas collection module changes the air volume collected in the compression station space by adjusting the power of the variable frequency fan to ensure that all gases in the compression station are effectively collected. Before operation, the upper and lower limits of the odor concentration of the malodorous gas and the corresponding power value of the variable frequency fan are preset in the control module 1. After it is turned on, the control module 1 analyzes the on-site monitoring data and issues a command to adjust the variable frequency fan to the corresponding collection condition. When the line monitoring module measures that the odor concentration of the malodorous gas is less than the lower limit of the preset value, the frequency of the variable frequency fan is reduced and the collected air volume is reduced; when the line monitoring module measures that the odor concentration of the malodorous gas is greater than the upper limit of the preset value, the frequency of the variable frequency fan is increased and the collected air volume is increased.

[0058] A specific implementation method:

[0059] When the odor concentration of the malodorous gas is 50000 or above, the air intake volume is 1500-2500m 3 / h for collection;

[0060] When the odor concentration of the malodorous gas is 10000-50000, the air intake volume is 1000-1500m 3 / h for collection;

[0061] When the odor concentration of the malodorous gas is 5000-10000, the air intake volume is 800-1200m 3 / h for collection;

[0062] When the odor concentration of the malodorous gas is less than 5000, the air intake volume is 1000m 3 / h for collection.

[0063] The selected values ​​are all optimal values, and the corresponding selected values ​​can be adjusted according to the processing situation.

[0064] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0067] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0068] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A system for treating malodor in a city garbage compression station, characterized in that: The urban garbage compression station odor treatment system comprises a control module and an online monitoring module, a gas collection module and a gas purification module connected to the control module; The online monitoring module is provided in the compression station and at the gas discharge port of the compression station, and is used to monitor the odor concentration of the malodorous gas and the concentration of ammonia and hydrogen sulfide gas in the malodorous gas; The gas purification module includes a free radical oxidation reaction device and a chemical washing device, the inlet of the gas collection module is arranged in the middle and lower area and the top of the compression station, and the outlet of the gas collection module, the free radical oxidation reaction device and the chemical washing device are connected in sequence; The control module is used to obtain the monitoring data of the online monitoring module, and to control the power of the gas collection module and the free radical oxidation reaction device and the pH value of the washing liquid in the chemical washing device in real time according to the monitoring data.

2. The odor treatment system for urban garbage compression stations according to claim 1, characterized in that: The malodorous gas is treated by the free radical oxidation reaction device, and the malodorous substances in the malodorous gas are decomposed by free radical oxidation to produce oxygen, carbon dioxide, water, nitrogen oxides, sulfur oxides and intermediate products; among them, the nitrogen oxides, sulfur oxides and incompletely decomposed intermediate products enter the chemical washing device again to be further absorbed and purified.

3. The odor treatment system for urban garbage compression stations according to claim 2, characterized in that: The control module analyzes the source strength of the malodorous gas and the change in the percentage of ammonia gas and hydrogen sulfide gas according to the monitoring data of the online monitoring module, and then adjusts the operating parameters of the gas purification module; Wherein, the operating parameters include the power of the free radical reaction device and the pH value of the washing liquid in the chemical washing device.

4. The odor treatment system for urban garbage compression stations according to claim 3, characterized in that: Before the operation of the odor treatment system for the urban garbage compression station, the upper and lower limit range values ​​of the odor concentration of the odorous gas are preset in the control module; When the line monitoring module measures that the odor concentration of the malodorous gas is less than a preset lower limit, reducing the power of the free radical reaction device; When the line monitoring module measures that the odor concentration of the malodorous gas is greater than a preset upper limit, increasing the power of the free radical reaction device; When the control module analyzes that the percentage of ammonia gas is greater than the percentage of hydrogen sulfide gas, adjusting the washing liquid in the chemical washing device to be acidic; When the control module analyzes that the percentage of ammonia gas is less than the percentage of hydrogen sulfide gas, the washing liquid in the chemical washing device is adjusted to be alkaline.

5. The odor treatment system for urban garbage compression stations according to claim 4, characterized in that: When the odor concentration of the malodorous gas is 50,000 or above, the free radical reaction device is 0.03w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device has a liquid-gas ratio of 3L / m 3 Perform chemical washing treatment; When the odor concentration of the malodorous gas is 10000-50000, the free radical reaction device is 0.02w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device has a liquid-gas ratio of 2.5L / m 3 Perform chemical washing treatment; When the odor concentration of the malodorous gas is 5000-10000, the free radical reaction device is 0.01w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device has a liquid-gas ratio of 2L / m 3 Perform chemical washing treatment; When the odor concentration of the malodorous gas is less than 5000, the free radical reaction device is 0.005w / (m 3 / h) power load for oxidation treatment, the chemical scrubbing device has a liquid-gas ratio of 1L / m 3 Perform chemical cleaning.

6. The odor treatment system for urban garbage compression stations according to claim 1, characterized in that: The gas collection module comprises a variable frequency fan, a gas collecting main pipe, and a plurality of first gas collecting branch pipes and a plurality of second gas collecting branch pipes connected to the gas collecting main pipe, the inlet of the variable frequency fan is connected to the gas collecting main pipe, and the outlet of the variable frequency fan is connected to the free radical oxidation reaction device; The inlets of the first gas collecting branch pipes are all arranged at the middle and lower positions of the inner space of the compression station, and the inlets of the second gas collecting branch pipes are all arranged at the top of the inner space of the compression station.

7. The odor treatment system for urban garbage compression stations according to claim 6, characterized in that: The first gas collecting branch pipes are all arranged on the inner wall of the first side wall of the compression station, the first side wall is opposite to the entrance and exit of the compression station, and the entrances of the first gas collecting branch pipes are all facing the entrance and exit of the compression station.

8. The odor treatment system for urban garbage compression stations according to claim 6, characterized in that: The second gas collecting branch pipe is provided with a plurality of inlets opening downward.

9. The odor treatment system for urban garbage compression stations according to claim 6, characterized in that: The variable frequency fan is connected to the control module, and the upper and lower limits of the odor concentration of the malodorous gas and the corresponding power value of the variable frequency fan are preset in the control module. When the line monitoring module measures that the odor concentration of the malodorous gas is less than the preset lower limit, the frequency of the variable frequency fan is reduced and the collected air volume is reduced; when the line monitoring module measures that the odor concentration of the malodorous gas is greater than the preset upper limit, the frequency of the variable frequency fan is increased and the collected air volume is increased.

10. The odor treatment system for urban garbage compression stations according to claim 9, characterized in that: When the odor concentration of the malodorous gas is 50,000 or above, the air volume is 1500-2500m 3 / h for collection; When the odor concentration of the malodorous gas is 10000-50000, the air intake volume is 1000-1500m 3 / h for collection; When the odor concentration of the malodorous gas is 5000-10000, the air intake volume is 800-1200m 3 / h for collection; When the odor concentration of the malodorous gas is less than 5000, the air volume is 1000m 3 / h for collection.

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