Method for identifying pollution of unorganized gas escaping from flotation

Abstract

The invention provides a method for identifying flotation escaping unorganized gas pollution, and belongs to the technical field of atmospheric environment protection. The method provided by the invention comprises the following steps: firstly, detecting the concentration of all components of the flotation gas, comparing the concentration with a standard requirement and a smell threshold value, and screening out a primary screening pollution factor; detecting the primarily screened pollution factors through a standard method, and screening out secondarily screened pollution factors; then testing the non-methane total hydrocarbon by a standard method, and screening out non-methane total hydrocarbon pollution factors; if the gas which exceeds the odor threshold value but does not belong to the secondary screening pollution factor in the primary screening pollution factor belongs to non-methane total hydrocarbon, the gas belongs to a non-methane total hydrocarbon pollution factor, and if the gas does not belong to non-methane total hydrocarbon, the gas belongs to an odor pollution factor; the obtained secondary screening pollution factor, the peculiar smell pollution factor and the non-methane hydrocarbon pollution factor are flotation gas pollution factors. Through the method, a technical method is provided for key pollutant identification in the mine industry.

Description

Technical Field

[0001] The invention relates to the technical field of atmospheric environmental protection, and in particular to a method for identifying flotation scattered unorganized gas pollution. Background Art

[0002] There are many types of flotation reagents for mineral flotation, and about a hundred types are commonly used. They are usually divided into three categories: collectors, frothers and adjusters. Collectors are a type of organic substance that can selectively act on the surface of minerals to make the mineral particles hydrophobic. They are generally organic substances such as sulfur, hydrocarbons, oxygen-containing acids (hydroxyls), hydrocarbon amines, hydrocarbon oils, etc.; frothers mainly act on the water-air interface to diffuse air into small bubbles in the slurry, and can improve the mineralization degree of the bubbles and the stability during the flotation process. They are generally organic substances such as alcohols, ether alcohols, ketone alcohols, and oxanes; adjusters can adjust the effects of other reagents (mainly collectors) on the mineral surface, adjust the properties of the slurry, and improve the selectivity of the desired minerals. According to their main functions, there are activators, inhibitors, pH adjusters, dispersants, or flocculants and defoamers, generally sulfiding agents (HS - ), humic acid, cyaniding agent (CN - ), starch, sodium tripolyphosphate, polyacrylamide, higher fatty acid esters and other organic compounds.

[0003] Flotation agents evaporate, undergo unstable hydrolysis, oxidation or photolysis under open aeration conditions, generating flotation gases that escape and are discharged into the workshop in an unorganized manner. These flotation gases have a strong odor and have an impact on the environment and human health. The chemical composition of these gases is complex. Except for a few inorganic compounds such as ammonia and hydrogen sulfide, the vast majority are organic matter, mainly including sulfur-containing compounds, nitrogen-containing compounds, aromatic hydrocarbons, aldehydes, ketones, alcohols, esters, fatty acids, etc. At present, metal mines have not conducted systematic research on the environmental safety and health theory and control technology of mineral processing agents, and are unable to make scientific evaluations and predictions on the pollution status and pollution trends of metal mine mineral processing agents. The relevant environmental monitoring is unclear, resulting in the hidden environmental pollution and health damage of flotation gases.

[0004] In the prior art, a patent with publication number CN 115407029 A provides a method for detecting indoor toxic and harmful gases. The patent obtains the maximum value of gas volatilization by controlling the season, weather and short detection time during detection, and observes whether it meets the normal human body acceptance standard. It also points out the goal of detecting gas in the mining industry, but the summary of the goal of detecting gas in the mining industry is not comprehensive enough, and no specific detection reference standard is given; a patent with publication number CN117491295A provides an industrial park toxic and harmful gas pollution early warning and disposal method based on remote sensing images. The patent adopts a combination of a hyperspectral sensor array and a remote-controlled drone, which can monitor toxic and harmful gases in industrial parks with high resolution, high sensitivity and high coverage, but also does not provide a standard detection method and assessment standard.

[0005] With the enhancement of environmental protection and health awareness, people have put forward higher requirements for the working environment. In order to achieve high-quality development, the identification of flotation fugitive unorganized gas pollution is the basic guarantee for pollution tracing and risk assessment, and is the core of determining the treatment technology plan.

[0006] Therefore, it is urgent to develop a method for identifying flotation fugitive unorganized gas pollution, monitor the pollution status and pollution trend of metal mine dressing reagents, and make scientific evaluation and prediction. Summary of the invention

[0007] In view of the technical problems existing in the background technology, the present application provides a method for identifying flotation fugitive unorganized gas pollution, aiming to fill the gap in the existing metal mining industry for flotation fugitive unorganized gas pollution identification methods.

[0008] The present application provides a method for identifying flotation fugitive unorganized gas pollution, comprising the following steps:

[0009] S1. Detect the concentration of all components of the flotation gas to obtain the concentration of all components of the flotation gas;

[0010] S2. Compare the concentration of all components of the flotation gas with the standard requirements and the odor threshold, and the gas whose concentration exceeds the standard requirements or the odor threshold is defined as the primary screening contamination factor;

[0011] S3. The primary screening contamination factor is tested again according to the standard method, and the gas whose concentration still exceeds the standard requirement is defined as the secondary screening contamination factor;

[0012] S4. Detect non-methane total hydrocarbons according to standard methods. If the non-methane total hydrocarbons exceed the standard requirements, it will be determined as the non-methane total hydrocarbon pollution factor;

[0013] S5. If the gas in the primary screening pollution factor that exceeds the olfactory threshold but does not belong to the secondary screening pollution factor belongs to non-methane total hydrocarbons, it is classified as the non-methane total hydrocarbon pollution factor; if it does not belong to non-methane total hydrocarbons, it is classified as the odor pollution factor;

[0014] S6. The sub-screening contamination factor, the odor contamination factor and the non-methane total hydrocarbon contamination factor are confirmed as flotation scattered unorganized gas contamination factors.

[0015] In the technical solution of the embodiment of the present application, the concentration of all components of the flotation gas is first detected, and compared with the relevant standard requirements and the olfactory threshold, and the primary screening pollution factor is screened out; the primary screening pollution factor is then detected by the corresponding standard method to screen out the secondary screening pollution factor; then the non-methane total hydrocarbons are tested by the corresponding standard method to screen out the non-methane total hydrocarbon pollution factor; if the gas in the primary screening pollution factor exceeds the olfactory threshold but does not belong to the secondary screening pollution factor belongs to the non-methane total hydrocarbons, it is attributed to the non-methane total hydrocarbon pollution factor; if it does not belong to the non-methane total hydrocarbons, it is attributed to the odor pollution factor; the obtained secondary screening pollution factor, odor pollution factor and non-methane total hydrocarbon pollution factor are confirmed as the flotation dissipated unorganized gas pollution factor. Among them, the detection and evaluation of the olfactory threshold effectively avoids the problem of repeated evaluation of the same gas by two types of pollutants, odor concentration and non-methane total hydrocarbons, in the atmospheric environmental protection standards, and also ensures a comprehensive evaluation of the gas that causes the odor.

[0016] In some embodiments, in step S1, the method for detecting the concentration of all components is to use portable GC-MS or GC-IMS for detection.

[0017] In this embodiment, the portable GC-MS and GC-IMS can be used to conveniently and quickly perform preliminary detection of all components of the flotation gas.

[0018] In some embodiments, in step S1, the detection point for detecting the concentration of all components is a dosing point in the flotation process.

[0019] In this embodiment, the dosing point of the flotation process is used as the detection point. The flotation gas concentration generated at this point is higher, and the detected gas components are more comprehensive.

[0020] In some embodiments, in step S2, the standard refers to the atmospheric environmental protection standard, GBZ 2.1-2019 "Occupational Exposure Limits for Hazardous Factors in the Workplace Part 1: Chemical Hazardous Factors".

[0021] In this embodiment, the pollution factors that have an impact on the environment and human health in the gas produced by flotation are screened out through relevant atmospheric environmental protection standards and occupational health exposure limits.

[0022] In some embodiments, the atmospheric environmental protection standards refer to GB 3095-2012 "Ambient Air Quality Standards", GB16297-1996 "Comprehensive Emission Standards for Atmospheric Pollutants", GB 14554-93 "Emission Standards for Odor Pollutants" and GB 37822-2019 "Volatile Organic Compound Unorganized Emission Control Standards".

[0023] In this embodiment, the above atmospheric environmental protection standards include the atmospheric pollution factors that may be generated by different reagents in the flotation process.

[0024] In some embodiments, the GBZ 2.1-2019 "Occupational Exposure Limits for Hazardous Factors in the Workplace Part 1: Chemical Hazardous Factors" requires that the exposure level be above Level III.

[0025] In this embodiment, if the exposure level in GBZ 2.1-2019 "Occupational Exposure Limits for Hazardous Factors in the Workplace Part 1: Chemical Hazardous Factors" reaches Level III or above, action needs to be taken to restrict activities, so the pollution factors that are harmful to human health are screened out.

[0026] In some embodiments, in step S4, the non-methane total hydrocarbons refer to the indicators required in GB 37822-2019 "Volatile Organic Compound Unorganized Emission Control Standard".

[0027] In this embodiment, non-methane total hydrocarbons are detected according to GB 37822-2019 "Volatile Organic Compound Unorganized Emission Control Standard", and non-methane total hydrocarbon pollution factors that are not screened out in step 2 can be screened out.

[0028] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. DETAILED DESCRIPTION

[0029] The following is a detailed description of the embodiments of the technical solution of the present application. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the description and claims of this application and any variations thereof are intended to cover non-exclusive inclusions.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] In order to fill the gap in the existing metal mining industry for the identification method of flotation fugitive unorganized gas pollution, the present application provides a method for flotation fugitive unorganized gas pollution identification. First, the concentration of all components of the flotation gas is detected, and compared with the relevant standard requirements and the olfactory threshold, and the primary screening pollution factor is screened out; then the primary screening pollution factor is detected by the corresponding standard method to screen out the secondary screening pollution factor; then the non-methane total hydrocarbons are tested by the corresponding standard method to screen out the non-methane total hydrocarbon pollution factor; the gas that exceeds the olfactory threshold in the primary screening pollution factor but does not belong to the secondary screening pollution factor is tested again according to the three-point comparison odor bag method. If the gas that still exceeds the olfactory threshold belongs to the non-methane total hydrocarbons, it is attributed to the non-methane total hydrocarbon pollution factor; if the gas that still exceeds the olfactory threshold does not belong to the non-methane total hydrocarbons, it is attributed to the odor pollution factor; the obtained secondary screening pollution factor, odor pollution factor and non-methane total hydrocarbon pollution factor are confirmed as the flotation fugitive unorganized gas pollution factor. Among them, the detection and evaluation of the olfactory threshold effectively avoids the problem of repeated evaluation of the same gas in the two types of pollutants, odor concentration and non-methane total hydrocarbons in the atmospheric environmental protection standards, and also ensures a comprehensive evaluation of the gas that causes the odor. This method can monitor and evaluate the flotation fugitive unorganized gas based on existing standards and technical specifications. It is systematic and operational, providing a basic guarantee for the pollution tracing and risk assessment of the flotation gas fugitive emission. It is the core of determining the subsequent treatment technology plan, and provides a technical method to solve the current lack of scientific and reliable key pollution factor identification methods, resulting in unclear identification of key pollutants, resulting in "difficult tracing, difficult evaluation, and difficult treatment" of odor pollution.

[0033] The present application provides a method for identifying flotation fugitive unorganized gas pollution, comprising the following steps:

[0034] S1. Detect the concentration of all components of the flotation gas to obtain the concentration of all components of the flotation gas;

[0035] S2. Compare the concentration of all components of the flotation gas with the standard requirements and the odor threshold, and the gas whose concentration exceeds the standard requirements or the odor threshold is defined as the primary screening contamination factor;

[0036] S3. The primary screening contamination factor is tested again according to the standard method, and the gas whose concentration still exceeds the standard requirement is defined as the secondary screening contamination factor;

[0037] S4. Detect non-methane total hydrocarbons according to standard methods. If the non-methane total hydrocarbons exceed the standard requirements, it will be determined as the non-methane total hydrocarbon pollution factor;

[0038] S5. If the gas in the primary screening pollution factor that exceeds the olfactory threshold but does not belong to the secondary screening pollution factor belongs to non-methane total hydrocarbons, it is classified as the non-methane total hydrocarbon pollution factor; if it does not belong to non-methane total hydrocarbons, it is classified as the odor pollution factor;

[0039] S6. The sub-screening contamination factor, the odor contamination factor and the non-methane total hydrocarbon contamination factor are confirmed as flotation scattered unorganized gas contamination factors.

[0040] In the technical solution of the embodiment of the present application, the concentration of all components of the flotation gas is first detected, and compared with the relevant standard requirements and the olfactory threshold, and the primary screening pollution factor is screened out; the primary screening pollution factor is then detected by the corresponding standard method to screen out the secondary screening pollution factor; then the non-methane total hydrocarbons are tested by the corresponding standard method to screen out the non-methane total hydrocarbon pollution factor; if the gas in the primary screening pollution factor exceeds the olfactory threshold but does not belong to the secondary screening pollution factor belongs to the non-methane total hydrocarbon category, it is attributed to the non-methane total hydrocarbon pollution factor; if it does not belong to the non-methane total hydrocarbon category, it is attributed to the odor pollution factor; the obtained secondary screening pollution factor, odor pollution factor and non-methane total hydrocarbon pollution factor are confirmed as the flotation dissipated unorganized gas pollution factor. Among them, the detection and evaluation of the olfactory threshold effectively avoids the problem of repeated evaluation of the same gas by two types of pollutants, odor concentration and non-methane total hydrocarbons, in the atmospheric environmental protection standards, and also ensures a comprehensive evaluation of the gas that causes the odor.

[0041] Furthermore, in some embodiments, in step S1, the method for detecting the concentration of all components is to use portable GC-MS or GC-IMS for detection.

[0042] In the technical solution of the embodiment of the present application, a portable GC-MS or GC-IMS can be used to conveniently and quickly perform preliminary detection of all components of the flotation gas.

[0043] Furthermore, in some embodiments, in step S1, the detection point for detecting the concentration of all components is a dosing point of the flotation process.

[0044] In the technical solution of the embodiment of the present application, the dosing point of the flotation process is used as the detection point. The flotation gas concentration generated at this point is higher, and the detected gas composition is more comprehensive.

[0045] Furthermore, in some embodiments, in step S2, the standard refers to the atmospheric environmental protection standard, GBZ 2.1-2019 "Occupational Exposure Limits for Hazardous Factors in the Workplace Part 1: Chemical Hazardous Factors".

[0046] In the technical solution of the embodiment of the present application, the pollution factors that have an impact on the environment and human health in the gas produced by flotation are screened out through relevant atmospheric environmental protection standards and occupational health exposure limits.

[0047] Furthermore, in some embodiments, the atmospheric environmental protection standards refer to GB 3095-2012 "Ambient Air Quality Standards", GB 16297-1996 "Comprehensive Emission Standards for Atmospheric Pollutants", GB 14554-93 "Emission Standards for Odor Pollutants" and GB37822-2019 "Volatile Organic Compound Unorganized Emission Control Standards".

[0048] In the technical solution of the embodiment of the present application, the above atmospheric environmental protection standards include the atmospheric pollution factors that may be generated by different reagents in the flotation process.

[0049] Furthermore, in some embodiments, the GBZ 2.1-2019 "Occupational Exposure Limits for Hazardous Factors in the Workplace Part 1: Chemical Hazardous Factors" requires that the exposure level be above Level III.

[0050] In the technical solution of the embodiment of the present application, if the exposure level reaches Level III or above in GBZ 2.1-2019 "Occupational Exposure Limits for Hazardous Factors in the Workplace Part 1: Chemical Hazardous Factors", action needs to be taken to restrict activities, so the pollution factors that are harmful to human health are screened out.

[0051] Furthermore, in some embodiments, in step S4, the non-methane total hydrocarbons refer to the indicators required in GB 37822-2019 "Volatile Organic Compound Unorganized Emission Control Standard".

[0052] In the technical solution of the embodiment of the present application, non-methane total hydrocarbons are detected by GB 37822-2019 "Volatile Organic Compound Unorganized Emission Control Standard", and non-methane total hydrocarbon pollution factors that are not screened out in step 2 can be screened out.

[0053] Some specific embodiments are listed below. It should be noted that the embodiments described below are exemplary and are only used to explain the present application, and should not be construed as limiting the present application. If specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in this area or the product specifications are used. The reagents or instruments used without specifying the manufacturer are all conventional products that can be obtained commercially.

[0054] Example 1

[0055] This embodiment provides a method for identifying flotation fugitive unorganized gas pollution, which specifically includes the following steps:

[0056] 1. The No. 1 flotation cell with rough flotation and dosing was selected as the sampling point for the identification of flotation fugitive gas pollution. Portable GC-MS and GC-IMS were used to detect the concentration of all components of flotation fugitive gas, and a total of 45 flotation gases were detected.

[0057] 2. The 45 detected flotation gases were compared with the corresponding gas assessment standards in GB 3095-2012 "Ambient Air Quality Standard", GB 16297-1996 "Integrated Emission Standard of Atmospheric Pollutants", GB 14554-93 "Emission Standard of Odor Pollutants", GB 37822-2019 "Volatile Organic Compounds Unorganized Emission Control Standard" and GBZ 2.1-2019 "Occupational Exposure Limits of Hazardous Factors in the Workplace Part 1: Chemical Hazardous Factors", and it was found that methyl mercaptan and styrene exceeded GB 14554-93 "Emission Standard of Odor Pollutants"; then the 45 detected gases were compared with the corresponding olfactory thresholds, and it was found that 2-methylbutane, styrene, methyl mercaptan, carbon disulfide, methyl methacrylate and hydrogen sulfide were higher than the olfactory threshold, as shown in Table 1. Therefore, 2-methylbutane, styrene, methyl mercaptan, carbon disulfide, methyl methacrylate and hydrogen sulfide are primary screening pollution factors.

[0058] 3. According to GB 14554-93 "Emission Standards for Odor Pollutants", methyl mercaptan, styrene, carbon disulfide and hydrogen sulfide were tested again, and it was found that methyl mercaptan, styrene, carbon disulfide and hydrogen sulfide exceeded the standard requirements and were determined as secondary screening pollution factors; 2-methylbutane was determined as the non-methane total hydrocarbon pollution factor, and methyl methacrylate was determined as the odor pollution factor; then according to GB 37822-2019 "Volatile Organic Compound Unorganized Emission Control Standards", non-methane total hydrocarbons were tested, and it was found that the concentration of non-methane total hydrocarbons exceeded the standard requirements, as shown in Table 2.

[0059] 4. It was finally concluded that the gaseous pollutants in this embodiment were methyl methacrylate, methyl mercaptan, styrene, carbon disulfide, hydrogen sulfide and non-methane total hydrocarbons.

[0060] Table 1 Comparison results of all component concentrations of flotation gas detected by GC-MS in Example 1 with relevant standards

[0061]

[0062]

[0063]

[0064] Table 2 Concentrations of the initial screening pollution factors and non-methane total hydrocarbons detected by the corresponding standards in Example 1 and the corresponding standard detection results and comparison results

[0065]

[0066]

[0067] Example 2

[0068] This embodiment provides a method for identifying flotation fugitive unorganized gas pollution, which is different from the embodiment 1 in that the selected flotation dosing point is different, that is, the detection is performed when another reagent is added. The other steps are substantially the same as the embodiment 1 and will not be described in detail here.

[0069] Portable GC-MS and GC-IMS were used to detect the concentration of all components of flotation unorganized escaped gases, and a total of 47 flotation gases were detected. By comparison, it was found that methyl mercaptan exceeded the "Emission Standards for Odor Pollutants"; methyl methacrylate, methyl mercaptan and isoprene exceeded the olfactory threshold. As shown in Table 3, methyl mercaptan, isoprene and methyl methacrylate were initially screened pollution factors.

[0070] Methyl mercaptan was tested again according to GB 14554-93 "Emission Standards for Odor Pollutants", and it was found that methyl mercaptan exceeded the standard requirements and was determined as a secondary screening contamination factor; among them, isoprene was attributed to non-methane total hydrocarbons, and methyl methacrylate was attributed to odor pollution factors; then according to GB 37822-2019 "Volatile Organic Compound Unorganized Emission Control Standards", non-methane total hydrocarbons were tested, and it was found that the concentration of non-methane total hydrocarbons exceeded the standard requirements, as shown in Table 4.

[0071] Finally, it was concluded that the gaseous pollutants in this embodiment were methyl mercaptan, methyl methacrylate and non-methane total hydrocarbons.

[0072] Table 3 Comparison results of all component concentrations of flotation gas detected by GC-MS and GC-IMS in Example 2 with relevant standards

[0073]

[0074]

[0075]

[0076]

[0077] Table 4 Concentrations of the initial screening pollution factors and non-methane total hydrocarbons detected by the corresponding standards in Example 2 and the corresponding standard detection results and comparison results

[0078]

[0079] In summary, the present application provides a method for identifying flotation scattered unorganized gas pollution. In the technical scheme of the embodiment of the present application, the concentration of all components of the flotation gas is first detected, and compared with the relevant standard requirements and the olfactory threshold, and the primary screening pollution factor is screened out; the primary screening pollution factor is then detected by the corresponding standard method to screen out the secondary screening pollution factor; then the non-methane total hydrocarbons are tested by the corresponding standard method to screen out the non-methane total hydrocarbon pollution factor; the gas in the primary screening pollution factor that exceeds the olfactory threshold but does not belong to the secondary screening pollution factor is re-detected according to the three-point comparison odor bag method, and if the gas that still exceeds the olfactory threshold belongs to the non-methane total hydrocarbons, it is attributed to the non-methane total hydrocarbon pollution factor; if the gas that still exceeds the olfactory threshold does not belong to the non-methane total hydrocarbons, it is attributed to the odor pollution factor; the obtained secondary screening pollution factor, odor pollution factor and non-methane total hydrocarbon pollution factor are confirmed as the flotation scattered unorganized gas pollution factor. Among them, the detection and evaluation of the olfactory threshold effectively avoids the problem of repeated evaluation of the same gas in the two types of pollutants, odor concentration and non-methane total hydrocarbons in the atmospheric environmental protection standards, and also ensures a comprehensive evaluation of the gas that causes the odor. This method can monitor and evaluate the flotation fugitive unorganized gas based on existing standards and technical specifications. It is systematic and operational, providing a basic guarantee for the pollution tracing and risk assessment of the flotation gas fugitive emission. It is the core of determining the subsequent treatment technology plan, and provides a technical method to solve the current lack of scientific and reliable key pollution factor identification methods, resulting in unclear identification of key pollutants, resulting in "difficult tracing, difficult evaluation, and difficult treatment" of odor pollution.

[0080] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A method for identifying flotation fugitive unorganized gas pollution, characterized in that: The steps include: S1. Detect the concentration of all components of the flotation gas to obtain the concentration of all components of the flotation gas; S2. Compare the concentration of all components of the flotation gas with the standard requirements and the odor threshold, and the gas whose concentration exceeds the standard requirements or the odor threshold is defined as the primary screening contamination factor; S3. The primary screening contamination factor is tested again according to the standard method, and the gas whose concentration still exceeds the standard requirement is defined as the secondary screening contamination factor; S4. Detect non-methane total hydrocarbons according to standard methods. If the non-methane total hydrocarbons exceed the standard requirements, it will be determined as the non-methane total hydrocarbon pollution factor; S5. If the gas in the primary screening pollution factor that exceeds the olfactory threshold but does not belong to the secondary screening pollution factor belongs to non-methane total hydrocarbons, it is classified as the non-methane total hydrocarbon pollution factor; if it does not belong to non-methane total hydrocarbons, it is classified as the odor pollution factor; S6. The sub-screening contamination factor, the odor contamination factor and the non-methane total hydrocarbon contamination factor are confirmed as flotation scattered unorganized gas contamination factors.

2. The method for identifying flotation fugitive unorganized gas pollution according to claim 1, characterized in that: In step S1, the method for detecting the concentration of all components is to use portable GC-MS or GC-IMS for detection.

3. The method for identifying flotation fugitive unorganized gas pollution according to claim 1, characterized in that: In step S1, the detection point for the detection of the concentration of all components is the dosing point of the flotation process.

4. The method for identifying flotation fugitive unorganized gas pollution according to claim 1, characterized in that: In step S2, the standard requirements refer to the atmospheric environmental protection standards and GBZ 2.1-2019 "Occupational Exposure Limits for Hazardous Factors in the Workplace Part 1: Chemical Hazardous Factors".

5. The method for identifying flotation fugitive unorganized gas pollution according to claim 4, characterized in that: The above-mentioned atmospheric environmental protection standards refer to GB 3095-2012 "Ambient Air Quality Standards", GB GB 16297-1996 Comprehensive Emission Standards for Air Pollutants, GB 14554-93 Emission Standards for Odor Pollutants and GB37822-2019 Control Standards for Unorganized Emissions of Volatile Organic Compounds.

6. The method for identifying flotation fugitive unorganized gas pollution according to claim 4, characterized in that: The GBZ2.1-2019 "Occupational exposure limits for hazardous factors in the workplace Part 1: Chemical hazardous factors" requires that the exposure level be above Level III.

7. The method for identifying flotation fugitive unorganized gas pollution according to claim 1, characterized in that: In step S4, the non-methane total hydrocarbons refer to the indicators required in GB 37822-2019 "Volatile Organic Compound Unorganized Emission Control Standard".

Images