A sintering flue gas pollution enrichment sampling and detection integrated system

Abstract

The application provides a sintering flue gas pollution enrichment sampling and detection integrated system, which comprises a sampling assembly, which is inserted into a flue filled with sintering flue gas to collect the sintering flue gas; a flue gas sampling assembly, which is connected with the sampling assembly and comprises a filtering and condensing component, a drying and adsorbing component and a pump extraction component arranged in sequence according to the flowing direction of the sintering flue gas; the sintering flue gas sequentially passes through the filtering and condensing component, the drying and adsorbing component and the pump extraction component, and respectively enriches to obtain liquid samples, adsorption samples and gas samples to be detected; and a detection assembly, which is located downstream of the flue gas sampling assembly and is used for detecting the liquid samples, the adsorption samples and the gas samples respectively. The application combines various sampling and analysis technologies to comprehensively and efficiently detect various pollutants in the sintering flue gas, including traditional inorganic pollutants, dioxin substances and unknown low-concentration pollutants.

Description

Technical Field

[0001] This application relates to the field of sintering flue gas pollutant detection technology, and in particular to an integrated system for enrichment sampling and detection of sintering flue gas pollutants. Background Technology

[0002] With the continuous advancement of industrialization, sintering flue gas, as one of the important pollution sources in the metallurgical industry, has gradually become an important research object in the field of environmental protection. The sintering process involves high-temperature chemical reactions, and the emitted flue gas contains not only a large number of inorganic pollutants (such as oxygen, carbon dioxide, water vapor, carbon monoxide, nitrogen oxides, sulfur dioxide, ammonia, hydrogen chloride, etc.), but also various other harmful substances, such as particulate matter, aerosols (including compounds of elements such as K, Na, Ca, Mg, etc.), SO3, low-C volatile organic compounds (VOCs), and dioxins. Due to the numerous and complex components of pollutants in sintering flue gas, traditional flue gas analysis methods mainly focus on the detection of conventional inorganic substances, often failing to comprehensively detect all potential pollutants in the flue gas.

[0003] Existing methods for detecting flue gas pollutants, including flue gas analyzers and dioxin samplers, are typically used to monitor common inorganic gas components such as oxygen, carbon dioxide, nitrogen oxides, and sulfur dioxide. Dioxin-type pollutants are usually analyzed using a dedicated waste gas dioxin sampler in conjunction with gas chromatography-mass spectrometry (GC-MS). However, the applicability and sensitivity of these methods often have limitations when dealing with low concentrations of unknown pollutants in sintering flue gas, especially under complex on-site sampling conditions and low pollutant concentrations. This may result in the failure to effectively detect trace or unidentified pollutants. Furthermore, existing detection technologies often rely on single analytical instruments, making it difficult to efficiently and accurately detect a wide range of pollutants in complex sintering flue gas, particularly limiting the sensitivity and accuracy of detection for low concentrations of unknown pollutants. This poses a significant challenge to the identification and control of potential pollutants during flue gas pollution control.

[0004] Therefore, how to provide a sintering flue gas pollutant detection system that can enrich and sample various low-concentration, complex unknown pollutants in sintering flue gas to achieve more accurate and comprehensive detection is a technical problem that technical personnel urgently need to solve. Utility Model Content

[0005] To address the aforementioned technical problems in the prior art, this application proposes an integrated system for enrichment sampling and detection of pollutants in sintering flue gas. By combining multiple sampling and analysis techniques, it comprehensively and efficiently detects various pollutants in sintering flue gas, including traditional inorganic pollutants, dioxins, and unknown low-concentration pollutants. The system in this application significantly improves the detection capability for low-concentration pollutants, ensuring efficient and accurate acquisition of pollutant composition information in sintering flue gas even in complex environments, thus providing more reliable data support for environmental governance and pollution control of sintering flue gas.

[0006] This application proposes an integrated system for enriching, sampling, and detecting pollutants in sintering flue gas, including... A sampling component that extends into a flue filled with sintering flue gas to collect the sintering flue gas; A flue gas sampling assembly, connected to the sampling assembly, includes a filter condenser, a drying adsorption unit, and a pump extraction unit arranged sequentially according to the flow direction of the sintering flue gas; the sintering flue gas passes sequentially through the filter condenser, the drying adsorption unit, and the pump extraction unit, respectively enriching to obtain a liquid sample, an adsorbed sample, and a gas sample to be tested; and The detection component, located downstream of the flue gas sampling component, is used to detect the liquid sample, the adsorbed sample, and the gas sample, respectively.

[0007] In some embodiments, the sampling assembly includes a sampling nozzle and a sampling smoke gun; the sampling nozzle is disposed at one end of the sampling smoke gun and extends into the flue to collect sintering flue gas; the other end of the sampling smoke gun is connected to the flue gas sampling assembly.

[0008] In some embodiments, the input end of the sampling nozzle is oriented in the opposite direction to the flow direction of the sintering flue gas in the flue; and the sampling nozzle and the sampling gun are connected by a curved pipe.

[0009] In some embodiments, the filter condenser includes a condenser and a liquid collector arranged sequentially in the direction of sintering flue gas flow; the filter condenser also includes a filter element for filtering and purifying the sintering flue gas.

[0010] In some embodiments, the filter element is disposed upstream of the condenser; and / or, the filter element is disposed downstream of the condenser.

[0011] In some embodiments, the filter element includes a first filter and a second filter located upstream and downstream of the condenser; the condenser includes a serpentine condenser tube and a coolant circulation path connected to the serpentine condenser tube for heat exchange; both ends of the serpentine condenser tube are connected to the first filter and the second filter, respectively; coolant is introduced into the coolant circulation path for heat exchange of the sintering flue gas introduced into the serpentine condenser tube.

[0012] In some embodiments, the filter condenser further includes a heat tracing cable wrapped around a sampling nozzle located outside the flue; and / or, the heat tracing cable is wrapped around a conduit between the first filter and the condenser to cool the sintering flue gas in the condenser and collect the condensed liquid sample in the collection device.

[0013] In some embodiments, the drying adsorption element includes a drying element and an adsorption element; the drying element is connected to the gas outlet of the liquid collection element, the gas outlet of the drying element is connected to the adsorption element, and the adsorption element collects the adsorbed sample.

[0014] In some embodiments, the pump extraction component includes a flow meter, a pump, and a gas bag arranged sequentially in the direction of sintering flue gas flow. The pump provides power for the flow of the sintering flue gas, and the gas bag collects the gas sample.

[0015] In some embodiments, the detection assembly includes an ion chromatograph and a liquid chromatograph for detecting the liquid sample; a gas chromatograph for detecting the gas sample; and a desorption unit and gas chromatography-mass spectrometry (GC-MS) for processing the adsorbed sample.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of an integrated system for enriching, sampling, and detecting pollutants in sintering flue gas, provided in one embodiment of this application. Explanation of reference numerals in the attached figures: In the diagram, 1. flue; 2. sampling nozzle; 3. sampling smoke gun; 4. heating tape; 5. first filter; 6. condenser; 7. cooling water pump; 8. second filter; 9. liquid collection unit; 10. drying unit; 11. adsorption unit; 12. flow meter; 13. pump. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of the present application, not all of them, and are not intended to limit the scope of the disclosure of the present application. Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion regarding the concepts disclosed in the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0019] The accompanying drawings show structural schematic diagrams according to embodiments disclosed in this application. These drawings are not drawn to scale, and some details have been enlarged and may have been omitted for clarity. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0020] This application addresses the following technical deficiencies: With the continuous advancement of industrialization, sintering flue gas, as one of the important pollution sources in the metallurgical industry, has gradually become an important research object in the field of environmental protection. The sintering process involves high-temperature chemical reactions, and the emitted flue gas contains not only a large number of inorganic pollutants (such as oxygen, carbon dioxide, water vapor, carbon monoxide, nitrogen oxides, sulfur dioxide, ammonia, hydrogen chloride, etc.), but also various other harmful substances, such as particulate matter, aerosols (including compounds of elements such as K, Na, Ca, Mg, etc.), SO3, low-C volatile organic compounds (VOCs), and dioxin-like organic pollutants. Due to the numerous and complex components of pollutants in sintering flue gas, traditional flue gas analysis methods mainly focus on the detection of conventional inorganic substances, often failing to comprehensively detect all potential pollutants in the flue gas.

[0021] Traditional methods for detecting pollutants in flue gas, such as flue gas analyzers, are primarily used to detect inorganic components in sintering flue gas, including O2, CO2, H2O, CO, NO, NO2, N2O, SO2, NH3, and HCl. For the detection of dioxins in sintering flue gas, a combination of a waste gas dioxin sampler, a flue gas analyzer, and gas chromatography-mass spectrometry (GC-MS) is often used to quantitatively detect dioxin homologues and their concentrations in the sintering flue gas. However, due to the complex composition of pollutants in sintering flue gas, in addition to inorganic pollutants (NO...),... xSintering flue gas contains a variety of components, including particulate matter, aerosols (containing K, Na, Ca, Mg, etc.), SO3, and low-C volatile organic compounds (VOCs), as well as dioxins. On-site sampling conditions are extremely complex, and due to the low concentration of unknown pollutants and limitations in the accuracy and sensitivity of detection instruments, it is difficult to determine the components of unknown pollutants in the sintering flue gas. For example, a related technology proposes an environmental flue gas pollutant purification performance evaluation device and method, including a flue gas manufacturing unit, an environmental flue gas detection unit, and a purification material evaluation unit. This device simulates a real flue gas environment and can analyze flue gas concentration and post-purification flue gas concentration in real time, as well as evaluate the purification performance of materials in sample tubes.

[0022] One of the main problems with existing flue gas pollutant detection methods is their singular focus. They primarily target specific pollutants (such as heavy metals, particulate matter, and soluble salts) or known components (such as inorganic gases), lacking the comprehensive analytical capability for complex pollutants in sintering flue gas (such as low-concentration unknown organic compounds, aerosols, and dioxins). Furthermore, existing methods often employ single sampling techniques, making it difficult to comprehensively capture the complex forms of pollutants in sintering flue gas (such as aerosols, low-boiling-point organic compounds, and high-boiling-point particulate matter). They also fail to enrich low-concentration pollutant components and do not consider water-soluble pollutants. In addition, regarding field adaptability, existing devices often rely on laboratories or fixed equipment, making it difficult to adapt to the high-temperature, dusty, and multi-component complex conditions of sintering flue gas, leading to decreased sampling accuracy or cumbersome operation.

[0023] The following is a reference to the appendix. Figure 1 The embodiments described herein provide an integrated system for enriching, sampling, and detecting pollutants in sintering flue gas, comprising a sampling component, a flue gas sampling component, and a detection component. The sampling component extends into a flue duct 1 filled with sintering flue gas to collect the flue gas. The flue gas sampling component is connected to the sampling component and includes a filter condenser, a drying adsorption component, and a pump extraction component arranged sequentially according to the flow direction of the sintering flue gas. The sintering flue gas passes sequentially through the filter condenser, the drying adsorption component, and the pump extraction component, respectively enriching to obtain liquid samples, adsorbed samples, and gas samples to be detected. The detection component is located downstream of the flue gas sampling component and is used to detect the liquid samples, adsorbed samples, and gas samples respectively.

[0024] In this application, a sampling component extends into the flue 1 filled with sintering flue gas to collect the sintering flue gas. The sintering flue gas collected by the sampling component enters the flue gas sampling component for enrichment and processing to obtain liquid samples, adsorbed samples, and gas samples to be tested. The liquid samples, adsorbed samples, and gas samples to be tested enter the detection component, which detects the liquid samples, adsorbed samples, and gas samples respectively. Therefore, compared with related technologies, this application uses multi-dimensional sampling and multi-technology combination to perform on-site enrichment sampling and comprehensive detection of pollutants in sintering flue gas (including inorganic substances, dioxins, aerosols, low C-number VOCs, etc.), solving the problem of insufficient detection capability of traditional methods for complex, low-concentration pollutants in sintering flue gas, and filling the gap in the identification and comprehensive analysis of unknown pollutants.

[0025] In some embodiments, the sampling assembly includes a sampling nozzle 2 and a sampling smoke gun 3; the sampling nozzle 2 is disposed at one end of the sampling smoke gun 3 and extends into the flue 1 to collect sintering flue gas; the other end of the sampling smoke gun 3 is connected to a flue gas sampling assembly.

[0026] The sampling assembly includes a sampling nozzle 2 and a sampling smoke gun 3. The sampling smoke gun 3 is a tubular structure, with one end extending into the flue 1 and the other end located outside the flue 1. The end of the sampling smoke gun 3 extending into the flue 1 is connected to the sampling nozzle 2. The sintering flue gas in the flue 1 enters the sampling smoke gun 3 through the sampling nozzle 2. The input end of the sampling nozzle 2 faces the opposite direction to the flow direction of the sintering flue gas in the flue 1. The sampling nozzle 2 and the sampling smoke gun 3 are connected by a curved pipe. In other words, with... Figure 1 Taking the vertical and horizontal directions marked in the figure as examples, the sintering flue gas in the flue 1 flows from bottom to top. The input end of the sampling nozzle 2 faces downward, and the output end of the sampling nozzle 2 is connected to the sampling gun 3 through a curved pipe. Compared with the case where the output end of the sampling nozzle 2 is vertically connected to the sampling gun 3, this embodiment can retain as many solid particles in the sintering flue gas collected by the sampling nozzle 2 as possible, preventing solid particles in the sintering flue gas from falling off after colliding with the sampling gun 3, or preventing solid particles in the sintering flue gas from sticking to the connection between the output end of the sampling nozzle 2 and the sampling gun 3.

[0027] In some embodiments, the filter condenser includes a condenser 6 and a liquid collector 9 arranged sequentially in the direction of sintering flue gas flow; the filter condenser also includes a filter element for filtering and purifying the sintering flue gas.

[0028] The flue gas sampling assembly includes components such as a filter condenser, a drying adsorption unit, and a pump extraction unit, arranged according to the flow direction of the sintering flue gas, for example... Figure 1As shown, in the flue gas sampling assembly, the sintering flue gas flows from left to right, sequentially entering the filtration and condensation unit, the drying and adsorption unit, and the pump extraction unit. The sintering flue gas, after passing through the filtration and condensation unit, can be enriched to obtain the liquid sample to be tested. The sintering flue gas output from the filtration and condensation unit continues to enter the drying and adsorption unit, where it can be enriched to obtain the adsorbed sample to be tested. The sintering flue gas output from the drying and adsorption unit continues to enter the pump extraction unit, where it can be enriched to obtain the gas sample to be tested.

[0029] The filtration and condensation component includes a condenser 6 and a liquid collection component 9. Following the flow direction of the sintering flue gas, the sintering flue gas passes through the condenser 6, reducing its temperature, and the condensed liquid sample to be tested is collected in the liquid collection component 9. Furthermore, the filtration and condensation component also includes a filter element for filtering and purifying the sintering flue gas.

[0030] For example, the filter element is located upstream of the condenser 6, meaning that the sintering flue gas passes sequentially through the filter element, condenser 6, and liquid collector 9 in the direction of flue gas flow. In other words, after the sintering flue gas is purified and particulate matter is removed by the filter element, it is cooled by the condenser 6, and the condensed liquid sample to be tested is enriched in the liquid collector 9.

[0031] In some embodiments, the filter element is located downstream of the condenser 6, i.e., in the direction of sintering flue gas flow, the sintering flue gas passes sequentially through the condenser 6, the filter element, and the liquid collection element 9. In other words, the sintering flue gas is cooled by the condenser 6, then purified by the filter element, and the gas with particulate matter removed by the filter is then passed into the liquid collection element 9, where the resulting liquid sample to be tested is enriched.

[0032] In some embodiments, the filter elements are disposed upstream and downstream of the condenser 6. As shown in the figure, in some embodiments, the filter elements include a first filter 5 and a second filter 8 located upstream and downstream of the condenser 6. In other words, the sintering flue gas is purified and filtered by the first filter 5 to remove particulate matter, achieving coarse filtration. After being cooled by the condenser 6, it is then purified and filtered by the second filter 8 to achieve fine filtration. Finally, the gas with particulate matter removed is passed into the liquid collection device 9, and the resulting liquid sample to be tested is enriched in the liquid collection device 9. This application removes particulate matter from the sintering flue gas step by step using the first filter 5 and the second filter 8. Combined with the condenser 6, the sintering flue gas can be controlled at 60°C. SO2 (gaseous) and SO3 (liquid) are separated in the condenser 6, avoiding the interference of SO2 oxidation on SO2 measurement in related technologies.

[0033] In some embodiments, the condenser 6 includes a serpentine condenser tube and a coolant circulation path connected to the serpentine condenser tube for heat exchange. In other words, the condenser 6 includes a serpentine condenser tube and a coolant circulation path, wherein the coolant circulation path is connected to the serpentine condenser tube for heat exchange; wherein coolant flows through the coolant circulation path, and the coolant is powered by a cooling water pump 7 to exchange heat with the sintering flue gas flowing into the serpentine condenser tube, and the two ends of the serpentine condenser tube are respectively connected to a first filter 5 and a second filter 8.

[0034] The filter condenser also includes a heating cable 4, which is wrapped around the sampling nozzle 3 located outside the flue 1; and / or, the heating cable 4 is wrapped around the pipeline between the first filter 5 and the condenser 6, so that the sintering flue gas is cooled in the condenser 6 and the condensed liquid sample is collected in the collection container 9. In other words, the filter condenser also includes a heating cable 4, which is wrapped around the sampling nozzle 3 located outside the flue 1; or the filter condenser also includes a heating cable 4, which is wrapped around the pipeline between the first filter 5 and the condenser 6; or the filter condenser also includes a heating cable 4, which is wrapped around the sampling nozzle 3 located outside the flue 1 and the pipeline between the first filter 5 and the condenser 6. In this application, the heating cable 4 can heat the wrapped part to maintain the temperature of the sintering flue gas and prevent premature condensation of the sintering flue gas, which could lead to pollutant loss or concentration calculation errors.

[0035] In some embodiments, the drying adsorption element includes a drying element 10 and an adsorption element 11; the drying element 10 is connected to the gas outlet of the liquid collection element 9, the gas outlet of the drying element 10 is connected to the adsorption element 11, and the adsorption element 11 collects the adsorbed sample.

[0036] The drying and adsorption components include a drying element 10 and an adsorption element 11. The liquid collection element 9 can be a buffer liquid collection bottle with a fully sealed structure. Its outlet is connected to the drying element 10. The drying element 10 contains a desiccant, which can be anhydrous CaCl2, with a moisture removal rate of ≥90%. The gas output from the liquid collection element 9 enters the drying element 10 for drying. After drying, the gas passes through the adsorption element 11, which is an activated carbon tube that can adsorb low-C VOCs such as ethylene oxide and acetaldehyde.

[0037] In some embodiments, the pump extraction component includes a flow meter 12, a pump 13, and a gas bag arranged sequentially in the direction of sintering flue gas flow. The pump 13 provides power for the flow of sintering flue gas, and the gas bag collects gas samples.

[0038] The pump extraction component includes a flow meter 12, a pump component 13, and a gas bag. The gas output from the adsorption component 11 passes through the flow meter 12, the pump component 13, and the gas bag in sequence. The pump component 13 provides power for the gas pump to draw gas and flow the sintering flue gas. The gas bag collects gases that are difficult to be adsorbed by the adsorption component 11, such as CH4 and C2H4. By adsorbing low-C VOCs through the adsorption component 11, the gas bag can collect gases that are difficult to be adsorbed by the adsorption component 11, thus achieving the capture of all components of organic matter.

[0039] In some embodiments, the detection components include an ion chromatograph and a liquid chromatograph for detecting liquid samples; a gas chromatograph for detecting gas samples; and a desorption unit and gas chromatography-mass spectrometry (GC-MS) for processing adsorbed samples.

[0040] The detection components include an ion chromatograph and a liquid chromatograph for detecting liquid samples. The liquid samples to be tested are detected using ion chromatography and liquid chromatography. The ion chromatograph is used to detect anions and cations in the condensate, including SO42-. 2- NO 3- Cl - Cations include K + Na + Ca 2+ Mg 2+ A liquid chromatograph (LC) is used to detect water-soluble organic acids. Depending on the measurement requirements, the liquid can be diluted or concentrated. The concentration of organic acids (formic acid, acetic acid) is detected by LC, and the pollutant emission is calculated in conjunction with the total flow meter 12. A gas chromatograph is used to detect the gaseous samples, and the content of gaseous components not adsorbed by the adsorbent element 11 is detected using gas chromatography. A desorption instrument and gas chromatography-mass spectrometry (GC-MS) are used to process the adsorbed samples. Simultaneously, thermal desorption is performed on the adsorbent element 11, and the enriched gaseous pollutants in the sampling tube are collected. GC-MS analysis is then used to analyze VOCs and dioxins in the adsorbed samples, identifying the location and content of organic pollutant components, achieving a comprehensive analysis of pollutant components in the sintering flue gas.

[0041] Therefore, the sintering flue gas pollutant enrichment sampling and detection system of this application uses ion chromatography and liquid chromatography to detect liquid samples, gas chromatography-TCD / FID / FPD to detect gas samples, and desorption instruments and gas chromatography in combination to detect adsorbed samples, thereby achieving accurate quantification of inorganic substances, organic acids, VOCs and unknown pollutants in sintering flue gas.

[0042] The core innovation of this invention lies in the construction of a multi-stage temperature-controlled sampling and multi-technology combined detection system, which breaks through the limitations of traditional methods in detecting complex pollutants in sintering flue gas. Through continuous heating with a heating cable 4 to prevent condensation (maintaining the original flue gas temperature at 150°C), multi-stage filtration with temperature-controlled condensation (precise separation of SO3 and SO2 at 60°C), and activated carbon-gas bag combined enrichment (adsorbing VOCs and collecting difficult-to-adsorb gases), the simultaneous capture of aerosols, inorganic acids, low-C organic compounds, and unknown pollutants is achieved, solving the problem of pollutant omission or concentration distortion caused by the single sampling conditions in traditional technologies. Simultaneously, this application combines ion chromatography (for anions and cations), liquid chromatography (for organic acids), gas chromatography-mass spectrometry (for VOCs and dioxins), and gas bag sampling (for inorganic gases) to construct a comprehensive detection chain covering inorganic substances, organic substances, and trace pollutants. By combining pollutant separation and enrichment with precise quantification technologies, the independent detection of SO3 and SO2 in sintering flue gas, the source tracing of aerosol components, and the identification of unknown VOCs were achieved for the first time, providing high-precision data support for the optimization of pollution control processes.

[0043] Compared to online mass spectrometry monitoring used in related technologies, which can analyze flue gas components in real time (e.g., proton transfer reaction mass spectrometry - PTR-MS) and reduce sampling steps, this application presents a different approach. However, these technologies are expensive, have poor tolerance to high-dust and high-temperature flue gases, and have insufficient detection limits (unable to identify ultra-low concentrations of pollutants such as dioxins). Alternatively, related technologies employ solid-phase microextraction (SPME), which requires no complex equipment and directly adsorbs pollutants through a fiber coating, making it suitable for rapid on-site sampling. However, it has low adsorption efficiency for high-boiling-point substances, requires strict calibration for quantitative analysis, and is difficult to achieve simultaneous enrichment of multiple pollutants.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An integrated system for enriching, sampling, and detecting pollutants in sintering flue gas, characterized in that, include A sampling component that extends into a flue filled with sintering flue gas to collect the sintering flue gas; A flue gas sampling assembly, which is connected to the sampling assembly, includes a filter condenser, a drying adsorption component, and a pump extraction component arranged sequentially according to the flow direction of the sintering flue gas. The sintering flue gas passes sequentially through the filter condenser, the drying adsorption unit, and the pump extraction unit to obtain the liquid sample, adsorption sample, and gas sample to be tested, respectively. as well as The detection component, located downstream of the flue gas sampling component, is used to detect the liquid sample, the adsorbed sample, and the gas sample, respectively.

2. The integrated system for enrichment, sampling, and detection of pollutants in sintering flue gas according to claim 1, characterized in that, The sampling assembly includes a sampling nozzle and a sampling smoke gun; the sampling nozzle is located at one end of the sampling smoke gun and extends into the flue to collect sintering flue gas; the other end of the sampling smoke gun is connected to the flue gas sampling assembly.

3. The integrated system for enrichment, sampling, and detection of pollutants in sintering flue gas according to claim 2, characterized in that, The input end of the sampling nozzle is oriented in the opposite direction to the flow direction of the sintering flue gas in the flue; and the sampling nozzle and the sampling smoke gun are connected by a curved pipe.

4. The integrated system for enrichment, sampling, and detection of pollutants in sintering flue gas according to any one of claims 1-3, characterized in that, The filtration and condensation component includes a condenser and a liquid collection component arranged sequentially according to the flow direction of the sintering flue gas; the filtration and condensation component also includes a filter element for filtering and purifying the sintering flue gas.

5. The integrated system for enrichment, sampling, and detection of pollutants in sintering flue gas according to claim 4, characterized in that, The filter element is disposed upstream of the condenser; and / or, the filter element is disposed downstream of the condenser.

6. The integrated system for enrichment, sampling, and detection of pollutants in sintering flue gas according to claim 5, characterized in that, The filter element includes a first filter and a second filter located upstream and downstream of the condenser; the condenser includes a serpentine condenser tube and a coolant circulation path connected to the serpentine condenser tube for heat exchange; the two ends of the serpentine condenser tube are respectively connected to the first filter and the second filter; coolant is introduced into the coolant circulation path for heat exchange of the sintering flue gas introduced into the serpentine condenser tube.

7. The integrated system for enrichment, sampling, and detection of pollutants in sintering flue gas according to claim 6, characterized in that, The filter condenser also includes a heat tracing cable wrapped around a sampling nozzle located outside the flue; and / or, the heat tracing cable is wrapped around a pipe between the first filter and the condenser to cool the sintering flue gas in the condenser and collect the condensed liquid sample in the collection device.

8. The integrated system for enrichment, sampling, and detection of pollutants in sintering flue gas according to claim 4, characterized in that, The drying and adsorption element includes a drying element and an adsorption element; the drying element is connected to the gas outlet of the liquid collection element, the gas outlet of the drying element is connected to the adsorption element, and the adsorption element collects the adsorbed sample.

9. The integrated system for enrichment, sampling, and detection of pollutants in sintering flue gas according to claim 4, characterized in that, The pump extraction component includes a flow meter, a pump, and a gas bag arranged sequentially according to the flow direction of the sintering flue gas. The pump provides power for the flow of the sintering flue gas, and the gas bag is used to collect the gas sample.

10. The integrated system for enrichment, sampling, and detection of pollutants in sintering flue gas according to claim 4, characterized in that, The detection assembly includes an ion chromatograph and a liquid chromatograph for detecting the liquid sample; a gas chromatograph for detecting the gas sample; and a desorption instrument and gas chromatography-mass spectrometry (GC-MS) for processing the adsorbed sample.

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