Environment flue gas pollutant purification performance evaluation device and use method

Abstract

The invention provides an environmental flue gas pollutant purification performance evaluation device and a use method. The environmental flue gas pollutant purification performance evaluation device comprises a flue gas manufacturing unit, an environmental flue gas detection unit and a purification material evaluation unit, the flue gas production unit comprises an environment flue gas bin, a smoke suction machine, a fan and a smoke exhaust assembly, and the environment flue gas bin is a closed bin body; the environment flue gas detection unit comprises a pipeline, a first suction pump, a plurality of environment flue gas detectors and a plurality of control valves, and is used for detecting the concentration of flue gas in the environment flue gas bin; the purification material evaluation unit comprises a pipeline, a sample tube, a second suction pump, a plurality of purified gas detectors and a plurality of control valves, and is used for detecting the concentration of the purified flue gas. The scheme has the advantages that the requirement on the performance of the prepared gas is relatively low, and the accuracy of a detection and comparison result is basically guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas purification, and in particular to a device for evaluating the purification performance of environmental flue gas pollutants and a method for using the same. Background Art

[0002] In the research and development activities of flue gas pollutant purification, the general practice is to use a variety of different purification materials to purify and adsorb an equal amount of standard gas for a single component flue gas, and evaluate the purification performance of the purification material.

[0003] This method can only express the performance of the purification material under a single gas component, but in fact the composition of flue gas is complex, and due to the interference of various factors such as ambient temperature and air pressure, the state of flue gas is not stable.

[0004] Moreover, the complexity of flue gas composition may lead to a certain degree of correlation between the components, and purification adsorption tests of a single gas component are difficult to solve this problem.

[0005] Therefore, how to form a test facility that is closer to the real flue gas environment, simulate the real environment flue gas more realistically, reflect the actual scene, and on the other hand, be able to conduct a more scientific evaluation of the purification performance of the purification material based on the prepared flue gas, has become a technical problem that technical personnel in this field urgently need to solve.

[0006] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0007] The purpose of the present invention is to address the deficiencies in the prior art and thereby provide an environmental flue gas pollutant purification performance evaluation device and a method for use in which a flue gas simulation environment is closer to reality and the accuracy of the results obtained by detection and comparison is basically guaranteed.

[0008] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: an environmental flue gas pollutant purification performance evaluation device, including a flue gas production unit, an environmental flue gas detection unit and a purification material evaluation unit; The smoke production unit comprises an ambient smoke chamber, a smoking machine, a fan and a smoke exhaust assembly, wherein the ambient smoke chamber is a closed chamber, the smoking machine is provided with an ambient smoke chamber for generating smoke, the fan is distributed in the ambient smoke chamber for dispersing smoke, and the smoke exhaust assembly is provided with a first outlet and a second outlet; The environmental smoke detection unit includes a pipeline, a first suction pump, a plurality of environmental smoke detectors and a plurality of control valves. The inlet end of the first suction pump is connected to the first outlet through the control valve and the pipeline. The outlet end of the first suction pump is connected to the inlet of each environmental smoke detector through a branch pipeline and a control valve, and is used to detect the smoke concentration in the environmental smoke bin. The outlet end of each environmental smoke detector is connected back to the environmental smoke bin through a pipeline. The purification material evaluation unit includes pipelines, sample tubes, a second suction pump, multiple purification gas detectors, several control valves and several flow meters. The inlet end of the sample tube is connected to the second outlet through the control valve and the pipeline, the inlet of the second suction pump is connected to the outlet of the sample tube, and the outlet of the second suction pump is connected to the inlet of each purification gas detector through a branch pipeline, a control valve and a flow meter for detecting the concentration of the purified flue gas. The outlet end of each purification gas detector is connected back to the environmental flue gas bin through a pipeline.

[0009] Based on the above, the first outlet and the second outlet are located at the same height relative to the ambient smoke chamber and are symmetrically distributed.

[0010] Based on the above, the first outlet and the second outlet both include a smoke hood located in the environmental smoke bin and a primary filter connected to the pipeline behind the smoke hood, and the smoke hood of the first outlet and the smoke hood of the second outlet are both arranged near the center of the environmental smoke bin.

[0011] Based on the above, the pipeline structure of the environmental smoke detection unit and the pipeline structure of the purification material evaluation unit are symmetrically distributed on both sides of the environmental smoke bin.

[0012] Based on the above, the pipelines in the environmental smoke detection unit and the purification material evaluation unit are wrapped with an electrically controlled heating layer.

[0013] Based on the above, an electrically controlled heating layer is provided on the outside of the environmental smoke chamber.

[0014] Based on the above, the electrically controlled heating layer outside the pipeline in the environmental smoke detection unit and the purification material evaluation unit and the electrically controlled heating layer outside the environmental smoke chamber control the heating temperature based on the same electrically controlled module.

[0015] Based on the above, it also includes an exhaust gas treatment unit, which includes a multi-stage absorption tower, a third suction pump and a control valve. The multi-stage absorption tower is connected to the top outlet of the environmental smoke bin through the control valve and the pipeline, and the outlet end of the multi-stage absorption tower is connected to the third suction pump, and the outlet of the suction pump is connected to the atmosphere.

[0016] A method for using an environmental flue gas pollutant purification performance evaluation device, comprising the environmental flue gas pollutant purification performance evaluation device, is performed through the following process: Environmental smoke preparation: After turning on the smoking machine and smoking for a period of time, turn off the smoking machine and turn on the fan to diffuse the generated smoke into the environmental smoke chamber. After a period of stabilization, perform environmental smoke detection; Ambient smoke concentration detection: Open the control valve and the first suction pump of the ambient smoke detection unit, detect the collected ambient smoke concentration through multiple ambient smoke detectors, obtain the initial concentration of the ambient smoke, record the initial concentration, and keep the ambient smoke detection unit open all the time; Purified gas flue gas concentration detection: open the control valve and the second suction pump of the purification material evaluation unit, and the flue gas enters each purified gas detector after passing through the sample tube and the second suction pump, and obtains the tail gas concentration of the purified flue gas after purification, and records the tail gas concentration; at the same time, the environmental gas detection unit synchronously detects the environmental flue gas concentration, obtains the change concentration of the environmental flue gas, and records the change concentration; When the concentration of each flue gas component detected by each purified gas detector is consistent with the concentration of the ambient flue gas component detected by the ambient gas detection unit, it is judged that the corresponding flue gas component has reached the penetration point, and a penetration curve and penetration point for evaluating the purification material for each flue gas component are formed; The change curve of the adsorption amount of flue gas components by the purification material within a certain period of time is calculated based on the gas flow meter.

[0017] After the concentrations of all flue gas components monitored by the purified gas detector and the environmental gas detection unit reach consistency and remain stable for a period of time, stop the detection.

[0018] Based on the above, after stopping the detection, start the exhaust gas treatment unit, which includes a multi-stage absorption tower, a third suction pump and a control valve. The multi-stage absorption tower is connected to the top outlet of the environmental smoke bin through the control valve and the pipeline, and the outlet end of the multi-stage absorption tower is connected to the suction pump, and the outlet of the suction pump is connected to the atmosphere, and the clean gas is discharged into the environment through dilution of the multi-stage absorption tower.

[0019] The present invention has outstanding substantive features and significant progress compared to the prior art. Specifically, the present invention has the following advantages: 1. Use a smoking machine in conjunction with a closed environmental smoke chamber to simulate real environmental smoke, and simulate different gradients of smoke concentration as needed to carry out a more systematic purification evaluation study.

[0020] 2. The environmental smoke detection unit and purification material evaluation unit for comparison are based on the environmental smoke bin and are set symmetrically at the same height. The path, working conditions and environmental parameters of the airflow passing through the smoke detectors of the two units are basically the same, and the accuracy of the test results is guaranteed to a certain extent.

[0021] 3. An electrically controlled heating layer is set outside all pipelines and environmental smoke chambers. The heating temperature can be controlled by a unified electronic control module, thereby improving the control capability, avoiding changes in the properties of smoke during circulation due to environmental factors, and improving accuracy.

[0022] 4. Set the real-time comparison of the three comparison parameters, namely, initial concentration, tail gas concentration and changing concentration, and set the route for cyclic dynamic detection. You can observe the efficiency of the purification material and the upper limit of the performance of the purification material as the purification proceeds. Compared with the traditional adsorption performance comparison under a single path, you can have a more comprehensive understanding of the performance of the purification material.

[0023] 5. It can evaluate the purification performance of materials for different flue gas components in real complex environments, making it easier to screen out suitable purification materials for different flue gas components. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural principle diagram of the environmental flue gas pollutant purification performance evaluation device in the present invention.

[0025] In the figure: 1. Smoke production unit; 2. Environmental smoke detection unit; 3. Purification material evaluation unit; 4. Control valve; 5. Exhaust treatment unit; 11. Environmental smoke chamber; 12. Smoke exhaust fan; 13. Fan; 141. Smoke hood; 142. Primary filter; 21. First suction pump; 22. Smoke detector; 31. Sample tube; 32. Second suction pump; 33. Purification gas detector; 51. Multi-stage absorption tower; 52. Third suction pump. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0027] like Figure 1 As shown, a device for evaluating the purification performance of environmental flue gas pollutants includes a flue gas production unit 1, an environmental flue gas detection unit 2 and a purification material evaluation unit 3.

[0028] The smoke generating unit comprises an environmental smoke bin 11, a smoking machine 12, a fan 13 and a smoke exhaust assembly. The environmental smoke bin 11 is a closed bin body. The smoking machine 12 is provided in the environmental smoke bin 11 for generating smoke. The fan 13 is distributed in the environmental smoke bin 11 for dispersing smoke. The smoke exhaust assembly is provided with a first outlet and a second outlet. Specifically, in the present embodiment, the first outlet and the second outlet are at the same height relative to the environmental smoke bin and are symmetrically distributed. The first outlet and the second outlet both comprise a smoke hood 141 located in the environmental smoke bin and a primary filter 142 connected to the pipeline behind the smoke hood 141, constituting the smoke exhaust assembly. The smoke hood of the first outlet and the smoke hood of the second outlet are both arranged near the center of the environmental smoke bin 11.

[0029] The environmental smoke chamber 11 cooperates with the smoke extractor 12 and the fan 13 to form a relatively stable and balanced smoke environment in the environmental smoke chamber 11. However, in practice, there will still be a certain degree of deviation in the distribution of the smoke. Therefore, setting the two outlets at the same height and setting the smoke hood 141 close to the center of the environmental smoke chamber 11 will be more conducive to absorbing smoke of the same properties and ensure that the air intake parameters of the environmental smoke detection unit 2 and the purification material evaluation unit 3 are consistent.

[0030] The environmental smoke detection unit 2 includes a pipeline, a first suction pump 21, multiple environmental smoke detectors 22 and several control valves 4. The inlet end of the first suction pump 21 is connected to the first outlet through the control valve 4 and the pipeline. The outlet end of the first suction pump 21 is connected to the inlet of each environmental smoke detector 22 through a branch pipeline and the control valve 4, and is used to detect the smoke concentration in the environmental smoke bin 11. The outlet end of each environmental smoke detector 22 is connected back to the environmental smoke bin 11 through a pipeline.

[0031] The purpose of the environmental smoke gas detection unit 2 is to obtain the smoke parameters in the current environmental smoke gas chamber 11 in real time, and to obtain the initial concentration of the prepared smoke before the detection begins. During the detection operation, as the adsorption purification proceeds, the smoke concentration in the environmental smoke gas chamber 11 will inevitably decrease gradually, and the environmental smoke gas detection unit 2 can obtain the changing environmental smoke gas concentration in real time.

[0032] The purification material evaluation unit 3 includes a pipeline, a sample tube 31, a second suction pump 32, multiple purification gas detectors 33, a number of control valves 4 and a number of flow meters 6. The inlet end of the sample tube 31 is connected to the second outlet through the control valve 4 and the pipeline, the inlet of the second suction pump 32 is connected to the outlet of the sample tube 31, and the outlet of the second suction pump 32 is connected to the inlet of each purification gas detector 33 through a branch pipeline, a control valve 4 and a flow meter 6 for detecting the concentration of the purified flue gas. The outlet end of each purification gas detector 33 is connected back to the environmental flue gas chamber 11 through a pipeline.

[0033] The purification material evaluation unit 3 is mainly used to detect the purified exhaust gas. The sample tube 31 stores the purification material to be evaluated. The flue gas is greatly purified after passing through the sample tube 31, and then enters the purified gas detector to obtain the exhaust gas concentration. This concentration represents the gas concentration of the current ambient flue gas after purification, which is the primary parameter for evaluating the efficiency of the purification material. This parameter is used to compare with the initial concentration and the dynamically changing ambient flue gas concentration to ultimately evaluate the various performances of the purification material.

[0034] In this embodiment, in order to overcome the interference caused by the design of the detection pipeline, the pipeline structure of the environmental smoke detection unit 2 and the pipeline structure of the purification material evaluation unit 3 are symmetrically distributed on both sides of the environmental smoke chamber 11. The two are symmetrical in structure, and the path length, turning, flow rate, etc. of the smoke during the movement are basically the same, which can effectively ensure the comparison accuracy.

[0035] In this embodiment, the environmental smoke detector 22 and the purified gas detector 33 can use common gas concentration detection equipment. The gas concentration detection function is usually integrated into a comprehensive gas detector, which can detect both gas concentration changes and gas components and has multiple functions.

[0036] Since flue gas is easily affected by temperature, the outside of the pipelines in the environmental smoke detection unit 2 and the purification material evaluation unit 3 are wrapped with an electrically controlled heating layer, and the outside of the environmental smoke bin 11 is provided with an electrically controlled heating layer. The electrically controlled heating layer outside the pipelines in the environmental smoke detection unit 2 and the purification material evaluation unit 3 and the electrically controlled heating layer outside the environmental smoke bin 11 control the heating temperature based on the same electrically controlled module, and can adjust the ambient temperature of the gas flowing through in real time and uniformly, so that the ambient temperature of the two units can be kept consistent, thereby ensuring the detection accuracy.

[0037] In order to prevent waste gas discharge from polluting the environment, a preferred embodiment also includes an exhaust gas treatment unit 5, which includes a multi-stage absorption tower 51, a third suction pump 52 and a control valve 4. The multi-stage absorption tower 51 is connected to the top outlet of the environmental smoke warehouse 11 through a control valve and a pipeline, and the outlet end of the multi-stage absorption tower 51 is connected to the third suction pump 52, and the outlet of the suction pump is connected to the atmosphere.

[0038] The multi-stage absorption tower 51 realizes exhaust gas adsorption by combining absorption towers filled with different adsorption materials. Common purification absorption towers such as polyester cotton absorption tower and activated carbon absorption tower can be selected and used in combination.

[0039] In this embodiment, the first absorption tower uses a mixture of propylene fiber and acetate fiber (mass ratio of 1:1), which has strong adsorption capacity for phenols, aldehydes and other components in environmental flue gas; the second absorption tower uses acetate fiber and porous resin (such as Tenax) (mass ratio of 1:3), which has strong adsorption capacity for VOCs, phenols, aldehydes and the like in environmental flue gas; the third absorption tower uses a compound of activated carbon and oxalic acid (mass ratio of 5:1), which has strong adsorption capacity for alkaloids such as nicotine in environmental flue gas; the fourth absorption tower uses a mixture of porous silicon powder and tungsten trioxide (mass ratio of 5:1), which has strong adsorption and catalytic conversion capacity for aldehydes, VOCs and the like in environmental flue gas.

[0040] The method for using the environmental flue gas pollutant purification performance evaluation device is performed through the following process: Environmental smoke preparation: After the smoking machine 12 is turned on and smoked for a period of time, the smoking machine 12 is turned off, and the fan 13 is turned on to diffuse the generated smoke to the environmental smoke chamber 11. After stabilization and aging for a period of time, the environmental smoke detection is performed; Environmental smoke concentration detection: open the control valve of the environmental smoke detection unit 2 and the first suction pump 21, detect the collected environmental smoke concentration through multiple environmental smoke detectors 22, obtain the initial concentration of the environmental smoke, record the initial concentration, and keep the environmental smoke detection unit 2 always open; Purified gas flue gas concentration detection: open the control valve of the purification material evaluation unit 3 and the second suction pump 32, and the flue gas enters each purified gas detector 33 after passing through the sample tube 31 and the second suction pump 32, and obtains the tail gas concentration of the purified flue gas after purification, and records the tail gas concentration; at the same time, the environmental gas detection unit synchronously detects the environmental flue gas concentration, obtains the change concentration of the environmental flue gas, and records the change concentration; When the concentration of each flue gas component detected by each purified gas detector is consistent with the concentration of the ambient flue gas component detected by the ambient gas detection unit, it is judged that the corresponding flue gas component has reached the penetration point, and a penetration curve and penetration point for evaluating the purification material for each flue gas component are formed; The change curve of the adsorption amount of flue gas components by the purification material within a certain period of time is calculated based on the gas flow meter.

[0041] After the concentrations of all flue gas components monitored by the purified gas detector and the environmental gas detection unit reach consistency and remain stable for a period of time, stop the detection.

[0042] After stopping the detection, start the tail gas treatment unit and discharge clean gas into the environment through dilution through a multi-stage absorption tower.

[0043] In this scheme, the initial concentration is used as the basic parameter for concentration comparison. As the purification process proceeds, there are two parameters that change, one of which is the change in exhaust gas concentration after purification. Generally speaking, by comparing the exhaust gas concentration with the current ambient gas concentration, the purification efficiency under the current gas concentration can be obtained. After adding time and circulation, the change in the purification capacity of the purification material as the purification process proceeds can be dynamically grasped, and finally the upper limit of the purification capacity can be obtained. The final data changes can be plotted into a curve, which reflects the performance of the purification material from multiple angles. Compared with the traditional single-path purification performance evaluation, it is more comprehensive.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A device for evaluating the performance of environmental flue gas pollutant purification, characterized in that: It includes a smoke production unit, an environmental smoke detection unit and a purification material evaluation unit; The smoke production unit comprises an ambient smoke chamber, a smoking machine, a fan and a smoke exhaust assembly, wherein the ambient smoke chamber is a closed chamber, the smoking machine is provided with an ambient smoke chamber for generating smoke, the fan is distributed in the ambient smoke chamber for dispersing smoke, and the smoke exhaust assembly is provided with a first outlet and a second outlet; The environmental smoke detection unit includes a pipeline, a first suction pump, a plurality of environmental smoke detectors and a plurality of control valves. The inlet end of the first suction pump is connected to the first outlet through the control valve and the pipeline. The outlet end of the first suction pump is connected to the inlet of each environmental smoke detector through a branch pipeline and a control valve, and is used to detect the smoke concentration in the environmental smoke bin. The outlet end of each environmental smoke detector is connected back to the environmental smoke bin through a pipeline. The purification material evaluation unit includes pipelines, sample tubes, a second suction pump, multiple purification gas detectors, several control valves and several flow meters. The inlet end of the sample tube is connected to the second outlet through the control valve and the pipeline, the inlet of the second suction pump is connected to the outlet of the sample tube, and the outlet of the second suction pump is connected to the inlet of each purification gas detector through a branch pipeline, a control valve and a flow meter for detecting the concentration of the purified flue gas. The outlet end of each purification gas detector is connected back to the environmental flue gas bin through a pipeline.

2. The environmental flue gas pollutant purification performance evaluation device according to claim 1, characterized in that: The first outlet and the second outlet are located at the same height relative to the ambient smoke chamber and are symmetrically distributed.

3. The environmental flue gas pollutant purification performance evaluation device according to claim 2, characterized in that: The first outlet and the second outlet both include a smoke hood located in the environmental smoke bin and a primary filter connected to the pipeline behind the smoke hood. The smoke hood of the first outlet and the smoke hood of the second outlet are both arranged near the center of the environmental smoke bin.

4. The environmental flue gas pollutant purification performance evaluation device according to claims 1-3, characterized in that: The pipeline structure of the environmental smoke detection unit and the pipeline structure of the purification material evaluation unit are symmetrically distributed on both sides of the environmental smoke bin.

5. The environmental flue gas pollutant purification performance evaluation device according to claim 4, characterized in that: The pipelines in the environmental smoke detection unit and the purification material evaluation unit are wrapped with an electrically controlled heating layer.

6. The environmental flue gas pollutant purification performance evaluation device according to claim 5, characterized in that: An electrically controlled heating layer is arranged outside the environmental smoke chamber.

7. The environmental flue gas pollutant purification performance evaluation device according to claim 6, characterized in that: The electrically controlled heating layer outside the pipeline in the environmental smoke detection unit and the purification material evaluation unit and the electrically controlled heating layer outside the environmental smoke bin control the heating temperature based on the same electrically controlled module.

8. The environmental flue gas pollutant purification performance evaluation device according to claim 7, characterized in that: It also includes an exhaust gas treatment unit, which includes a multi-stage absorption tower, a third suction pump and a control valve. The multi-stage absorption tower is connected to the top outlet of the environmental smoke bin through the control valve and the pipeline, the outlet end of the multi-stage absorption tower is connected to the third suction pump, and the outlet of the suction pump is connected to the atmosphere.

9. A method for using a device for evaluating the performance of environmental flue gas pollutant purification, characterized in that: The environmental flue gas pollutant purification performance evaluation device comprising any one of claims 1 to 7 is implemented by the following process: Environmental smoke preparation: After turning on the smoking machine and smoking for a period of time, turn off the smoking machine and turn on the fan to diffuse the generated smoke into the environmental smoke chamber. After a period of stabilization, perform environmental smoke detection; Ambient smoke concentration detection: Open the control valve and the first suction pump of the ambient smoke detection unit, detect the collected ambient smoke concentration through multiple ambient smoke detectors, obtain the initial concentration of the ambient smoke, record the initial concentration, and keep the ambient smoke detection unit open all the time; Purified gas flue gas concentration detection: open the control valve and the second suction pump of the purification material evaluation unit, and the flue gas enters each purified gas detector after passing through the sample tube and the second suction pump, and obtains the tail gas concentration of the purified flue gas after purification, and records the tail gas concentration; at the same time, the environmental gas detection unit synchronously detects the environmental flue gas concentration, obtains the change concentration of the environmental flue gas, and records the change concentration; When the concentration of each flue gas component detected by each purified gas detector is consistent with the concentration of the ambient flue gas component detected by the ambient gas detection unit, it is judged that the corresponding flue gas component has reached the penetration point, and a penetration curve and penetration point for evaluating the purification material for each flue gas component are formed; Calculate the variation curve of the adsorption amount of flue gas components by the purification material within a certain period of time according to the gas flow meter; After the concentrations of all flue gas components monitored by the purified gas detector and the environmental gas detection unit reach consistency and remain stable for a period of time, stop the detection.

10. The method for using the environmental flue gas pollutant purification performance evaluation device according to claim 9, characterized in that: After stopping the detection, start the exhaust gas treatment unit, which includes a multi-stage absorption tower, a third suction pump and a control valve. The multi-stage absorption tower is connected to the top outlet of the environmental smoke bin through the control valve and the pipeline, and the outlet end of the multi-stage absorption tower is connected to the suction pump, and the outlet of the suction pump is connected to the atmosphere. Through the dilution of the multi-stage absorption tower, clean gas is discharged into the environment.

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