Odor pretreatment system and method using intelligent control technology

Abstract

The present invention provides an odor pretreatment system and method of intelligent control technology, comprising: a scene trigger, a malodor gas front-end processor, a control center and a malodor detection device; the malodor gas front-end processor comprises: a dilution module and an enrichment module; the scene trigger is respectively connected to the dilution module and the enrichment module through a three-way solenoid valve; the control center is respectively connected to the dilution module and the enrichment module; the dilution module and the enrichment module are respectively connected to the odor monitoring device through a three-way solenoid valve.

Description

Technical Field

[0001] The present invention relates to the field of environment, and in particular, to an odor pretreatment system and method using intelligent control technology, and more particularly, to an odor pretreatment system based on gas pretreatment and intelligent control technology. Background Art

[0002] Odor is one of the most complained environmental issues by the public, and it has long been at the top of the list of air-related complaints in my country. The number of complaints and reports on odors from 2018 to 2020 accounted for 22.1% of all environmental complaints and reports.

[0003] Malodors are characterized by high activity, low olfactory threshold, easy volatility and diffusion, diverse production scenarios, and strong instantaneous concentration variability.

[0004] A large amount of odor is released during the collection, transportation and disposal of domestic waste. Affected by the ambient temperature, humidity and wind speed, the components and concentrations of the odor vary significantly in different collection, transportation and disposal scenarios. The odor characteristics also vary in different time periods in the same scenario. The odor concentration varies from time to time, which brings great inconvenience to the pretreatment and monitoring of odorous gases.

[0005] Patent document CN105771626A (application number: 201610278888.4) discloses a malodorous waste gas treatment device. It includes a purification chamber, a first switching gate and a waste gas inlet; the purification chamber includes a left air inlet, a right air inlet, a left discharge port and a right discharge port; the left air inlet is connected to the right discharge port; the right air inlet is connected to the left discharge port; one end of the first switching gate is fixed on the purification chamber baffle, and the other end can swing to connect to the waste gas inlet, and can swing to the left or right side of the waste gas inlet, so that the incoming waste gas can enter one of the right air inlet or the left air inlet; a purification device is arranged in the purification chamber for purifying waste gas.

[0006] As the front-end part of odor monitoring, odor gas pretreatment affects the accuracy and stability of odor online monitoring to a certain extent. As the core module of odor online monitoring, the sensor array's signal response quality and sensor life are related to the monitored odor gas concentration. Long-term high-concentration odor gas monitoring tasks are prone to sensor poisoning or even damage. When the odor gas concentration is too low, the sensor cannot detect the response signal.

[0007] The malodorous gas front-end treatment instrument proposed in the present invention is composed of a malodorous gas enrichment module and a dilution module connected in parallel after an adsorption module. It has the performance advantages of both modules and can automatically compare the database content according to the scene trigger instructions and match the corresponding malodorous gas pretreatment mode.

[0008] The scene trigger proposed in the present invention can customize an exclusive typical scene database according to user needs, and can preliminarily determine the odor level of the current usage scene through the odor level dial. Summary of the invention

[0009] In view of the defects in the prior art, the object of the present invention is to provide an odor pretreatment system and method with intelligent control technology.

[0010] According to the present invention, a malodor pretreatment system using intelligent control technology includes: a scene trigger, a malodor gas front-end processor, a control center, and a malodor detection device;

[0011] The malodorous gas front-end treatment instrument comprises: a dilution module and an enrichment module;

[0012] The scene trigger is connected to the dilution module and the enrichment module respectively through a three-way solenoid valve;

[0013] The control center is connected to the dilution module and the enrichment module respectively;

[0014] The dilution module and the enrichment module are respectively connected to the odor monitoring equipment through three-way solenoid valves.

[0015] Preferably, when the dilution module and the enrichment module are connected to the odor monitoring device, the gas paths of the dilution module and the enrichment module are connected in parallel mode.

[0016] Preferably, the dilution module comprises a clean air pipeline, a malodorous gas pipeline, a three-way solenoid valve, a dilution ratio controller, a gas mixing chamber and a fan;

[0017] The clean air pipeline and the malodorous gas pipeline are connected in parallel to the dilution ratio controller through the three-way solenoid valve; the dilution ratio controller is connected to the first port of the mixing chamber; the second port of the mixing chamber is connected to the fan; the third port of the mixing chamber is connected to the exhaust pipeline; the fourth port of the mixing chamber is connected to the odor monitoring device through the three-way solenoid valve;

[0018] The clean air pipeline includes an adsorption module, an air pump and a mass flow meter; one end of the adsorption module inhales clean air, and the other end is connected to one end of the air pump; the other end of the air pump is connected to the mass flow meter; the mass flow meter is connected to the dilution ratio controller through the three-way solenoid valve;

[0019] The malodorous gas pipeline includes an air pump and a mass flow meter; one end of the air pump is connected to the scene trigger through a three-way solenoid valve; the other end is connected to one end of the mass flow meter; the other end of the mass flow meter is connected to the dilution ratio controller through the three-way solenoid valve.

[0020] Preferably, the adsorption module adsorbs impurity gases including N2 and CO2.

[0021] Preferably, the enrichment module comprises a mass flow meter, an air pump and a three-stage cold trap module;

[0022] The three-stage cold trap module includes a first-stage water removal trap, a second-stage enrichment trap and a third-stage deep cryofocusing trap;

[0023] One end of the air pump is connected to the scene trigger through a three-way solenoid valve, and the other end is connected to the first-level water removal trap in the three-level cold trap module; the first-level water removal trap is connected to the second-level enrichment trap; the second-level enrichment trap is connected to the three-level deep cryofocusing trap; the three-level deep cryofocusing trap is connected to the first port of the three-way solenoid valve, and the second port of the three-way solenoid valve uses a Teflon tube as a concentrated gas outlet and is connected to the odor monitoring equipment through the three-way solenoid valve; the third port of the three-way solenoid valve is used for emptying;

[0024] The secondary enrichment trap is connected to a mass flow meter, and the mass flow meter is connected to a drying and emptying pipeline.

[0025] According to a method for pre-treatment of odor using intelligent control technology provided by the present invention, the following steps are performed using the odor pre-treatment system using the intelligent control technology described above:

[0026] Step S1: using the scene trigger terminal to select the scene database to be called, and obtaining the concentration distribution of the odor component to be tested in the source database under the current scene according to the called scene database;

[0027] Step S2: judging the relationship between the gas concentration in the current scene and the detection threshold of the sensor module according to the gas concentration distribution in the current scene, and entering the gas dilution module if it is higher than the threshold; otherwise, entering the enrichment module;

[0028] Step S3: Perform odor online monitoring on the gas concentration in the current scene after being processed by the dilution module or the enrichment module.

[0029] Preferably, the scenario database includes a database of odor component concentrations in the scenario of domestic waste collection, transportation and disposal, and the odor OU range of the built-in database includes: landfill 4404±493OU / m 3 、Composting plant 3099±534OU / m 3 、Anaerobic digestion plant 1656±200OU / m 3 , transfer station 464±74OU / m 3 、Garbage room 28±4OU / m 3 .

[0030] Preferably, in the dilution module, when the malodorous gas enters the dilution module, the control center selects the corresponding dilution ratio according to the upper and lower limit thresholds of the sensor module and the concentration of the malodorous component in the current scene in the calling database, and dilutes the clean air and the malodorous gas in the mixing chamber to obtain the malodorous gas that meets the preset conditions.

[0031] Preferably, in the enrichment module, the malodorous gas is separated from the water by dry ice in the first-level dewatering trap; the carbon dioxide is separated from the malodorous gas to be measured by the second-level enrichment trap and discharged; the control center selects the corresponding concentration ratio according to the upper and lower limit thresholds of the sensor module and the concentration of the malodorous component in the current scene in the call database; finally, the malodorous components to be measured are gathered in the third-level deep cryofocusing trap for further concentration.

[0032] Preferably, when the external odor monitoring device does not have the real-time data display function, the current odor gas situation in the source database under the current scene is compared with the data actually analyzed by the odor monitoring device to perform error correction.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The present invention proposes a gas front-end pretreatment system for malodorous gas enrichment and dilution in parallel, which makes up for the limitation of the use of a single gas pretreatment mode, and uses it as an external module at the air inlet of the malodor online monitoring system, which can improve the quality of the gas to be tested to a certain extent and enhance the monitoring accuracy;

[0035] 2. The present invention can remove impurity gases such as N2 and CO2 through the adsorption module in the dilution module, thereby improving the purity of the malodorous gas to be tested; the three-stage cold trap of the enrichment module can remove impurity gases in the air such as water and carbon dioxide, thereby improving the purity of the malodorous gas to be tested;

[0036] 3. The scenario trigger proposed in the present invention has a built-in odor concentration database for five typical scenarios: landfill, composting plant, anaerobic digestion plant, transfer station, and garbage room. It can be used as a standard database for front-end pretreatment of odorous gas, and can also be used as a calibration database for odor monitoring. It also supports user-defined typical scenario databases, which can meet the needs of odorous gas pretreatment in various scenarios.

[0037] 4. Based on the existing gas treatment technology and automation information technology, the present invention solves the gas pretreatment problem in multiple scenarios of domestic garbage odor, and can also be combined with odor monitoring equipment to realize the intelligent integration of odor gas pretreatment and monitoring functions;

[0038] 5. The present invention has the common advantages of gas dilution and enrichment, and can complete water removal, impurity removal, dilution or enrichment according to specific scenarios, on the one hand, improving the purity of the gas to be tested; on the other hand, while extending the service life of the sensor in the odor monitoring equipment, it solves the problem that its use range is restricted by the effective detection range of the sensor. In view of the instantaneous and changing characteristics of odor concentration, the odor monitoring equipment is more practical and applicable; the attached five typical scenario databases store database concentration information and corresponding odor gas available sensor parameters in different scenarios according to the collection, transportation and disposal of domestic waste, providing certain data support for the study of domestic waste odor characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0040] Figure 1 Flow chart of odor pretreatment using intelligent control technology.

[0041] Figure 2 This is a working principle diagram of a system for pre-treatment of variable malodorous gases in a typical scenario.

[0042] Figure 3 This is a structural diagram of a system for pre-treatment of variable malodorous gases in a typical scenario.

[0043] I-Scene trigger, II-Front-end pre-treatment instrument for malodorous gases. DETAILED DESCRIPTION

[0044] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0045] Example 1

[0046] According to the present invention, a malodor pretreatment system using intelligent control technology includes: a scene trigger, a malodor gas front-end processor, a control center, and a malodor detection device;

[0047] The malodorous gas front-end treatment instrument comprises: a dilution module and an enrichment module;

[0048] The scene trigger is connected to the dilution module and the enrichment module respectively through a three-way solenoid valve;

[0049] The control center is connected to the dilution module and the enrichment module respectively;

[0050] The dilution module and the enrichment module are respectively connected to the odor monitoring equipment through three-way solenoid valves.

[0051] Specifically, when the dilution module and the enrichment module are connected to the odor monitoring device, the gas paths of the dilution module and the enrichment module are connected in parallel mode.

[0052] Specifically, the dilution module includes a clean air pipeline, a malodorous gas pipeline, a three-way solenoid valve, a dilution ratio controller, a gas mixing chamber and a fan;

[0053] The clean air pipeline and the malodorous gas pipeline are connected in parallel to the dilution ratio controller through the three-way solenoid valve; the dilution ratio controller is connected to the first port of the mixing chamber; the second port of the mixing chamber is connected to the fan; the third port of the mixing chamber is connected to the exhaust pipeline; the fourth port of the mixing chamber is connected to the odor monitoring device through the three-way solenoid valve;

[0054] The clean air pipeline includes an adsorption module, an air pump and a mass flow meter; one end of the adsorption module inhales clean air, and the other end is connected to one end of the air pump; the other end of the air pump is connected to the mass flow meter; the mass flow meter is connected to the dilution ratio controller through the three-way solenoid valve;

[0055] The malodorous gas pipeline includes an air pump and a mass flow meter; one end of the air pump is connected to the scene trigger through a three-way solenoid valve; the other end is connected to one end of the mass flow meter; the other end of the mass flow meter is connected to the dilution ratio controller through the three-way solenoid valve.

[0056] Specifically, the adsorption module adsorbs impurity gases including N2 and CO2.

[0057] Specifically, the enrichment module includes a mass flow meter, an air pump and a three-stage cold trap module;

[0058] The three-stage cold trap module includes a first-stage water removal trap, a second-stage enrichment trap and a third-stage deep cryofocusing trap;

[0059] One end of the air pump is connected to the scene trigger through a three-way solenoid valve, and the other end is connected to the first-level water removal trap in the three-level cold trap module; the first-level water removal trap is connected to the second-level enrichment trap; the second-level enrichment trap is connected to the three-level deep cryofocusing trap; the three-level deep cryofocusing trap is connected to the first port of the three-way solenoid valve, and the second port of the three-way solenoid valve uses a Teflon tube as a concentrated gas outlet and is connected to the odor monitoring equipment through the three-way solenoid valve; the third port of the three-way solenoid valve is used for emptying;

[0060] The secondary enrichment trap is connected to a mass flow meter, and the mass flow meter is connected to a drying and emptying pipeline.

[0061] According to an odor pretreatment method of an intelligent control technology provided by the present invention, Figure 1 As shown, the odor pretreatment system using the above-mentioned intelligent control technology performs the following steps:

[0062] Step S1: Use the scene trigger terminal to select the scene database to be called, and obtain the concentration distribution of the odor component to be tested in the source database under the current scene and the corresponding default odor OU value under the current scene according to the called scene database, and present them on the display screen;

[0063] Step S2: judging the relationship between the gas concentration in the current scene and the detection threshold of the sensor module according to the gas concentration distribution in the current scene, and entering the gas dilution module if it is higher than the threshold; otherwise, entering the enrichment module;

[0064] Step S3: Perform odor online monitoring on the gas concentration in the current scene after being processed by the dilution module or the enrichment module.

[0065] Specifically, the scenario database includes a database of odor component concentrations in five typical scenarios of domestic waste collection, transportation and disposal. The odor OU range of the built-in default database includes: landfill 4404±493OU / m 3 、Composting plant 3099±534OU / m 3 、Anaerobic digestion plant 1656±200OU / m 3 , transfer station 464±74OU / m 3 、Garbage room 28±4OU / m 3 .

[0066] Specifically, in the dilution module, when the malodorous gas enters the dilution module, the control center selects the corresponding dilution ratio according to the upper and lower limit thresholds of the sensor module and the concentration of the malodorous component in the current scene in the calling database, and dilutes the clean air and the malodorous gas in the mixing chamber to obtain the malodorous gas that meets the preset conditions.

[0067] Specifically, in the enrichment module, the malodorous gas to be tested is separated from water by dry ice in the first-level dewatering trap; the carbon dioxide is then separated from the malodorous gas to be tested by the second-level enrichment trap and discharged; the control center selects the corresponding concentration ratio according to the upper and lower limit thresholds of the sensor module and the concentration of the malodorous component in the current scene in the call database; finally, the malodorous components to be tested are gathered in the third-level deep cryofocusing trap for further concentration.

[0068] Specifically, when the external odor monitoring device has no real-time data display function, the current OU value of the odor gas in the source database in the current scene is compared with the data actually analyzed by the odor monitoring device and errors are corrected; for example: when the external odor monitoring device has no real-time data display function, and the display screen can only display the overall response curve, the corresponding data is collected through the external odor monitoring device, and the collected corresponding data is compared with the current OU value of the odor gas in the source database. When there is a large error, the odor monitoring device can be corrected.

[0069] Example 2

[0070] Embodiment 2 is a preferred embodiment of Embodiment 1

[0071] like Figure 2 As shown, the present invention proposes a system for pre-treatment of variable malodorous gases in a typical scenario, such as Figure 2-3 As shown, including: scene trigger ( Figure 3 -I), gas front-end processor ( Figure 3 -II). Scene Trigger ( Figure 3 -I) includes scene trigger terminal, data storage module, data display screen, odor level display panel; odor gas front-end processor ( Figure 3 -II) includes: adsorption module, dilution module, enrichment module, status display module, control center, and power supply.

[0072] The scene trigger has five built-in typical scene trigger buttons for selecting the manually specified detection scene. Above the trigger button is a data display screen, and below is an odor level display panel. The scene trigger end can manually select the scene database to be called through the trigger button, and judge the relationship between the gas concentration in the scene and the detection threshold of the sensor module according to the gas concentration mean value in the database. If it is higher than the threshold, it will enter the gas dilution module, otherwise it will enter the enrichment module;

[0073] The scene trigger has five built-in typical scenes, including: built-in database of concentrations of odor components in five typical scenes of domestic waste collection, transportation and disposal, and the odor OU range of the built-in default database is: landfill (4404±493OU / m 3 )、Composting plant (3099±534OU / m 3 ) , anaerobic digestion plant (1656±200OU / m 3 ), transfer station (464±74OU / m 3 )、Garbage room (28±4OU / m 3 );

[0074] It also supports user-defined import or replacement of source data. The corresponding data import, typical scene naming and typical scene channel replacement corresponding to the trigger button can all be operated on the data display screen.

[0075] The data display screen can show the concentration distribution of the odor components to be tested in the current scene (generally consistent with the external odor monitoring equipment) in the source database and the corresponding default odor OU value in the current scene;

[0076] The odor level display panel contains six levels, namely 0-no odor, 1-detection threshold, 2-recognition threshold, 3-obvious detection, 4-strong odor, 5-extreme odor;

[0077] The odorous gas front-end treatment instrument includes: adsorption module, three-way solenoid valve, dilution module, enrichment module, status display module, control center, power supply;

[0078] The adsorption module is the inlet of clean air and is connected in parallel with the inlet of malodorous gas. It can also be used to adsorb impurity gases such as N2 and CO2.

[0079] One end of the malodorous gas front-end processor is connected to the scene trigger, and the other end is reserved for an external gas path interface and a corresponding interface sealing plug. The gas path interface is equipped with a variety of reducers to match a variety of gas path calibers. The two sides of the interior of the malodorous gas front-end processor are a dilution module and an enrichment module respectively, and the bottom is a control center and a power supply. According to the instructions sent by the control center, you can choose to enter the gas dilution or enrichment state. In the current scene, the average gas concentration is higher than the detection threshold of the sensor module and enters the gas dilution state, otherwise it enters the enrichment state;

[0080] The dilution module comprises: an air pump, a gas mixing chamber, a three-way solenoid valve, a dilution ratio controller, a fan, and a mass flow meter.

[0081] The enrichment module includes: a mass flow meter, a pump, and a three-stage cold trap module; the three-stage cold trap is characterized by a first-stage water removal trap, a second-stage enrichment trap, and a third-stage deep cryofocusing trap, with a temperature of -190°C to 300°C and a concentration ratio of >1000:1.

[0082] The odor pretreatment method according to the intelligent control technology of the present invention comprises:

[0083] Connect the scene trigger to the odorous gas front-end processor and turn on the power;

[0084] Press the trigger button on the scene trigger according to the usage scenario, and the data storage module calls the database under the corresponding scenario to determine the relationship between the odor concentration value and the sensor detection threshold under the scenario, and choose to enter the gas dilution or enrichment state;

[0085] If the value is higher than the threshold, the gas dilution state is entered. The environmental odor enters the dilution module through the three-way solenoid valve. The dilution ratio controller dilutes the odorous gas pumped in by the scene trigger and the air cleaned and removed by the adsorption module in proportion. The dilution ratio is determined by the data storage module, which queries the odor component concentration, each sensor threshold and the corresponding dilution multiple information in the corresponding scene. The control center sends a command to dilute the gas in the mixing chamber. The diluted gas can be connected to the odor online monitoring equipment through the external gas line interface, and the diluted exhaust gas is discharged from the diluted gas exhaust port;

[0086] If the value is lower than the threshold, the gas will enter the gas enrichment state. The environmental odor will enter the enrichment module through the three-way solenoid valve, and the pumped gas will enter the three-stage cold trap module. The concentration ratio will be queried by the data storage module for the concentration of odor components, the threshold of each sensor and the corresponding concentration ratio information in the corresponding scene, and the control center will send instructions to complete the enrichment. The enriched gas can be connected to the odor online monitoring equipment through the external gas line interface, and the exhaust gas will be discharged from the exhaust port of the enrichment module.

[0087] Those skilled in the art know that, in addition to implementing the system, device and its various modules provided by the present invention in a purely computer-readable program code, it is entirely possible to implement the same program in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers and embedded microcontrollers by logically programming the method steps. Therefore, the system, device and its various modules provided by the present invention can be considered as a hardware component, and the modules included therein for implementing various programs can also be considered as structures within the hardware component; the modules for implementing various functions can also be considered as both software programs for implementing the method and structures within the hardware component.

[0088] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An odor pretreatment system using intelligent control technology, characterized in that: include: Scene triggers, odorous gas front-end processors, control centers, and odor detection equipment; The malodorous gas front-end treatment instrument comprises: a dilution module and an enrichment module; The scene trigger includes a scene trigger end; The scene trigger has five built-in typical scene trigger buttons for selecting manually specified detection scenes; The scene trigger end can manually select the scene database to be called through the trigger button, and judge the relationship between the gas concentration in the current scene and the detection threshold of the sensor module according to the gas concentration mean value in the database. If it is higher than the threshold, it enters the gas dilution module, otherwise it enters the enrichment module; the scene trigger is respectively connected to the dilution module and the enrichment module through a three-way solenoid valve; The control center is connected to the dilution module and the enrichment module respectively; The dilution module and the enrichment module are respectively connected to the odor monitoring device through a three-way solenoid valve; When the dilution module and the enrichment module are connected to the odor monitoring device, the gas paths of the dilution module and the enrichment module are connected in parallel mode; The dilution module includes a clean air pipeline, a malodorous gas pipeline, a three-way solenoid valve, a dilution ratio controller, a mixing chamber and a fan; The clean air pipeline and the malodorous gas pipeline are connected in parallel to the dilution ratio controller through the three-way solenoid valve; the dilution ratio controller is connected to the first port of the mixing chamber; the second port of the mixing chamber is connected to the fan; the third port of the mixing chamber is connected to the exhaust pipeline; the fourth port of the mixing chamber is connected to the odor monitoring device through the three-way solenoid valve; The clean air pipeline includes an adsorption module, an air pump and a mass flow meter; one end of the adsorption module inhales clean air, and the other end is connected to one end of the air pump; the other end of the air pump is connected to the mass flow meter; the mass flow meter is connected to the dilution ratio controller through the three-way solenoid valve; The malodorous gas pipeline includes an air pump and a mass flow meter; one end of the air pump is connected to the scene trigger through a three-way solenoid valve; the other end is connected to one end of the mass flow meter; the other end of the mass flow meter is connected to the dilution ratio controller through the three-way solenoid valve; The adsorption module adsorbs impurity gases including N2 and CO2.

2. The odor pretreatment system of the intelligent control technology according to claim 1 is characterized in that: The enrichment module includes a mass flow meter, an air pump and a three-stage cold trap module; The three-stage cold trap module includes a first-stage water removal trap, a second-stage enrichment trap and a third-stage deep cryofocusing trap; One end of the air pump is connected to the scene trigger through a three-way solenoid valve, and the other end is connected to the first-level water removal trap in the three-level cold trap module; the first-level water removal trap is connected to the second-level enrichment trap; The secondary enrichment well is connected to the tertiary cryogenic focusing well; the tertiary cryogenic focusing well is connected to the first port of a three-way solenoid valve; the second port of the three-way solenoid valve uses a Teflon tube as a concentrated gas outlet and is connected to an odor monitoring device through the three-way solenoid valve; the third port of the three-way solenoid valve is used for emptying; The secondary enrichment trap is connected to a mass flow meter, and the mass flow meter is connected to a drying and emptying pipeline.

3. A method for pre-treatment of odor using intelligent control technology, characterized in that: The odor pretreatment system using the intelligent control technology described in any one of claims 1 to 2 performs the following steps: Step S1: using the scene trigger terminal to select the scene database to be called, and obtaining the concentration distribution of the odor component to be tested in the source database under the current scene according to the called scene database; Step S2: judging the relationship between the gas concentration in the current scene and the detection threshold of the sensor module according to the gas concentration distribution in the current scene, and entering the gas dilution module if it is higher than the threshold; otherwise, entering the enrichment module; Step S3: Perform odor online monitoring on the gas concentration in the current scene after being processed by the dilution module or the enrichment module.

4. The odor pretreatment method using intelligent control technology according to claim 3 is characterized in that: The scenario database includes the concentration database of various odor components in the scenario of domestic waste collection, transportation and disposal. The odor OU range of the built-in database includes: landfill 4404±493OU / m 3 、Composting plant 3099±534OU / m 3 、Anaerobic digestion plant 1656±200OU / m 3 , transfer station 464±74OU / m 3 、Garbage room 28±4OU / m 3 .

5. The odor pretreatment method using intelligent control technology according to claim 3 is characterized in that: In the dilution module, when the malodorous gas enters the dilution module, the control center selects the corresponding dilution ratio according to the upper and lower limit thresholds of the sensor module and the concentration of the malodorous component in the current scene in the calling database, and dilutes the clean air and the malodorous gas in the mixing chamber to obtain the malodorous gas that meets the preset conditions.

6. The odor pretreatment method using intelligent control technology according to claim 3 is characterized in that: In the enrichment module, the malodorous gas is separated from the water by dry ice in the first-level dewatering trap; the carbon dioxide is separated from the malodorous gas to be tested and discharged through the second-level enrichment trap; the control center selects the corresponding concentration ratio according to the upper and lower limit thresholds of the sensor module and the concentration of the malodorous component in the current scene in the call database; finally, the malodorous components to be tested are gathered in the third-level deep cryofocusing trap for further concentration.

7. The odor pretreatment method using intelligent control technology according to claim 3 is characterized in that: When the external odor monitoring device does not have the real-time data display function, the current odor gas situation in the source database under the current scene is compared with the data actually analyzed by the odor monitoring device to correct errors.

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