Novel sampling system for total particulate matters in waste gas of stationary pollution source

Abstract

The utility model discloses a novel sampling system for total particulate matters in waste gas of a stationary pollution source, which belongs to the technical field of sampling of particulate matters in waste gas of a stationary pollution source, aims at solving the problem of poor condensation effect, and comprises an FPM filter cartridge and a sampling port, the FPM filter cartridge is arranged on the left side of the sampling port, a sampling gun is arranged behind the FPM filter cartridge and passes through the sampling port, and the sampling gun is connected with the FPM filter cartridge. A spiral condenser pipe is arranged at the rear end of the sampling gun, an automatic refrigeration water tank is arranged at the rear end of the spiral condenser pipe, a vacuum gauge is arranged at the rear end of the automatic refrigeration water tank, and a valve is arranged at the rear end of the vacuum gauge; by adopting the sampling mode that the front end sampling gun collects FPM and the rear end impact bottle and the CPM filter membrane box collect CPM at the same time, FPM and CPM can be sampled at the same time, the rear end of the FPM sampling gun is heated, adhesion loss of CPM is reduced, meanwhile, high-temperature waste gas is condensed through an automatic condensation and circulation device, the condensation effect is ensured, and the accuracy of a CPM sampling result is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of particulate matter sampling for fixed pollution sources, and particularly relates to a novel total particulate matter sampling system for fixed pollution sources in waste gas. Background Technique

[0002] With the promotion of ultra-low emissions in industries such as coal-fired power plants, iron and steel, and cement, the emission concentration of filterable particulate matter (FPM) in the waste gas of fixed pollution sources has decreased significantly, but the problem of condensable particulate matter (CPM) emissions has become increasingly prominent. CPM is usually a gaseous substance in the high-temperature flue gas environment in the flue, and quickly condenses or reacts to form particulate matter after being discharged into the atmospheric environment. Since the current ultra-low emission control process mainly aims at the efficient removal of conventional pollutants such as FPM, the removal efficiency of CPM and its precursors is usually low. As a result, after the ultra-low emission transformation, the mass ratio of CPM in the total particulate matter (FPM + CPM) in the flue gas at the end of the emission is getting higher and higher. According to relevant literature reports, the mass ratio of CPM in the total particulate matter in the flue gas of different fixed pollution sources ranges from 36.3% to 98.5%.

[0003] The CPM sampling equipment uses an ice-water bath as a method for condensing high-temperature waste gas, and there are problems such as poor condensation effect.

[0004] Therefore, a novel total particulate matter sampling system for fixed pollution sources in waste gas is needed to solve the problem of poor condensation effect in the existing technology. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a novel total particulate matter sampling system for fixed pollution sources in waste gas to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A novel total particulate matter sampling system for fixed pollution sources in waste gas, including an FPM filter cartridge and a sampling port. The FPM filter cartridge is arranged on the left side of the sampling port. A sampling gun is arranged behind the FPM filter cartridge and is arranged through the sampling port. A spiral condenser is arranged at the rear end of the sampling gun. An automatic refrigeration water tank is arranged at the rear end of the spiral condenser. A vacuum gauge is arranged at the rear end of the automatic refrigeration water tank. A valve is arranged at the rear end of the vacuum gauge. A vacuum pump is arranged through the valve at the rear end of the vacuum gauge, and another valve is arranged on the vacuum pump. A dry gas flowmeter is arranged at the rear end of the vacuum pump. A pressure gauge is arranged at the rear end of the dry gas flowmeter, and an exhaust hole is arranged at the rear end.

[0007] Inside the automatic refrigeration water tank, a water pump and a dry impact absorption bottle group are connected to the automatic refrigeration water tank. A buffer bottle and a silica gel impact bottle are sequentially arranged at the rear end of the dry impact absorption bottle group. A CPM filter membrane is arranged between the dry impact absorption bottle group and the buffer bottle, and a thermometer is provided. Another thermometer is arranged at the rear end of the silica gel impact bottle. A control module is arranged on the automatic refrigeration water tank for controlling and displaying the temperature of the automatic refrigeration water tank.

[0008] It should be noted in the solution that a thermocouple is configured in the sampling gun to control the temperature, and the sampling gun can be heated and the temperature is higher than 120 °C.

[0009] Furthermore, it is worth noting that the sampling gun is made of stainless steel.

[0010] Even further, it should be noted that the automatic refrigeration water tank is configured with a thermocouple to control the temperature.

[0011] As a preferred implementation manner, the CPM filter membrane is configured with a thermocouple to control the temperature.

[0012] Compared with the prior art, a novel total particulate matter sampling system for waste gas from stationary pollution sources provided by the present utility model has at least the following beneficial effects:

[0013] (1) By adopting a sampling method of collecting FPM with a front-end sampling gun and collecting CPM with a rear-end impact bottle and a CPM filter membrane box simultaneously, simultaneous sampling of FPM and CPM can be achieved. Heating the rear end of the FPM sampling gun reduces the attachment loss of CPM. At the same time, an automatic condensation and circulation device is used to condense high-temperature waste gas to ensure the condensation effect and improve the accuracy of the CPM sampling result.

[0014] (2) It can simultaneously collect FPM and CPM in the waste gas from stationary pollution sources, with precise temperature and flow control, high sampling efficiency, and small loss, making the monitoring results accurate and reliable. At the same time, the sampling gun uses stainless steel material and the CPM sampling component uses proportional material, with easy availability of materials and low manufacturing cost, and it is relatively easy to realize industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic flow diagram of the sampling system of the present utility model.

[0016] In the figure: 1. FPM filter cartridge; 2. Sampling port; 3. Sampling gun; 4. Spiral condenser; 5. Automatic refrigeration water tank; 501. Water pump; 502. Dry impact absorption bottle group; 5021. Buffer bottle; 5022. Silica gel impact bottle; 503. CPM filter membrane; 504. Control module; 6. Thermometer; 7. Vacuum gauge; 701. Valve; 702. Vacuum pump; 8. Dry flowmeter; 9. Pressure gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following further describes the present utility model in conjunction with embodiments.

[0018] Please refer to Figure 1 , the present utility model provides a new total particulate matter sampling system for waste gas from fixed pollution sources, including an FPM filter cartridge 1 and a sampling port 2. The FPM filter cartridge 1 is arranged on the left side of the sampling port 2. A sampling gun 3 is arranged behind the FPM filter cartridge 1 and is arranged through the sampling port 2. A spiral condenser 4 is arranged at the rear end of the sampling gun 3. An automatic refrigeration water tank 5 is arranged at the rear end of the spiral condenser 4. A vacuum gauge 7 is arranged at the rear end of the automatic refrigeration water tank 5. A valve 701 is arranged at the rear end of the vacuum gauge 7. A vacuum pump 702 is arranged at the rear end of the vacuum gauge 7 through the valve 701, and another valve 701 is arranged on the vacuum pump 702. A dry gas flowmeter 8 is arranged at the rear end of the vacuum pump 702. A pressure gauge 9 is arranged at the rear end of the dry gas flowmeter 8, and an exhaust hole is arranged at the rear end.

[0019] A water pump 501 and a dry impact absorption bottle group 502 are connected in the automatic refrigeration water tank 5 and are connected to the automatic refrigeration water tank 5. A buffer bottle 5021 and a silica gel impact bottle 5022 are sequentially arranged at the rear end of the dry impact absorption bottle group 502. A CPM filter membrane 503 is arranged between the dry impact absorption bottle group 502 and the buffer bottle 5021, and a thermometer 6 is arranged. Another thermometer 6 is arranged at the rear end of the silica gel impact bottle 5022. A control module 504 is arranged on the automatic refrigeration water tank 5 for controlling and displaying the temperature of the automatic refrigeration water tank 5.

[0020] During use, the temperature of the sampling gun 3 is maintained above 120 °C to minimize the condensation loss of CPM in the sampling gun 3 as much as possible, and it is filtered through the FPM filter cartridge 1. The filtered flue gas enters the dry impact absorption bottle group 502 after being cooled in the spiral condenser 4. To reduce the error caused by the dissolution of soluble gases in water, dry impact bottles are used and placed in the automatic refrigeration water tank 5 at 30 °C. The CPM filter membrane 503 arranged behind the dry impact absorption bottle group 502 further captures the CPM escaping with the flue gas. By adopting the sampling method of collecting FPM with the front-end sampling gun 3 and collecting CPM with the rear-end impact bottles and the CPM filter membrane 503 simultaneously, simultaneous sampling of FPM and CPM can be achieved. Heating the rear end of the FPM sampling gun 3 reduces the adhesion loss of CPM. At the same time, an automatic condensation and circulation device is used to condense the high-temperature waste gas to ensure the condensation effect and improve the accuracy of the CPM sampling result.

[0021] According to the above working process, it can be seen that: by adopting the sampling method of collecting FPM with the front-end sampling gun 3 and collecting CPM with the rear-end impact bottles and the CPM filter membrane 503 simultaneously, simultaneous sampling of FPM and CPM can be achieved. Heating the rear end of the FPM sampling gun 3 reduces the adhesion loss of CPM. At the same time, an automatic condensation and circulation device is used to condense the high-temperature waste gas to ensure the condensation effect and improve the accuracy of the CPM sampling result.

[0022] Furthermore, it is worth specifically stating that a thermocouple is configured inside the sampling gun 3 to control the temperature. The sampling gun 3 can be heated and the temperature is higher than 120°C. The sampling gun 3 is made of stainless steel.

[0023] Furthermore, it is worth specifically stating that a thermocouple is configured for the automatic refrigeration water tank 5 to control the temperature, and a thermocouple is configured for the CPM filter membrane 503 to control the temperature.

[0024] Compared with the traditional particulate matter sampling gun, the FPM sampling gun 3 has a heating function to prevent condensable particulate matter from condensing and adhering inside the sampling gun 3, causing sampling loss. Thermocouples are configured in the condensable particulate matter CPM filter membrane 503, the sampling gun 3, and the automatic refrigeration water tank 5, which have the function of controlling and detecting the temperature of each component. The sampling of the power and control unit adopts a modular design and has an automatic control function, with a high degree of automation.

[0025] This solution has the following working process: When this system is in use, the sampling gun 3 is maintained at a temperature above 120°C to minimize the condensation loss of CPM in the sampling gun 3 as much as possible, and the flue gas is filtered through the FPM filter cartridge 1. After cooling in the spiral condenser 4, the filtered flue gas enters the dry impact absorption bottle group 502. To reduce the error caused by the dissolution of soluble gases in water, dry impact bottles are used and placed in the automatic refrigeration water tank 5 at 30°C. A CPM filter membrane 503 is arranged behind the dry impact absorption bottle group 502 to further capture the CPM escaping with the flue gas. A buffer bottle 5021 and a silica gel impact bottle 5022 are arranged behind the CPM filter membrane 503 to further cool and dry the flue gas, ensuring the normal operation of the subsequent sampling pump and gas flow measurement equipment.

[0026] In summary: By adopting the sampling method of collecting FPM with the front-end sampling gun 3 and collecting CPM with the rear-end impact bottle and CPM filter membrane 503 at the same time, simultaneous sampling of FPM and CPM can be achieved. Heating the rear end of the FPM sampling gun 3 reduces the adhesion loss of CPM. At the same time, an automatic condensation and circulation device is used to condense high-temperature waste gas, ensuring the condensation effect and improving the accuracy of the CPM sampling result. The invention can simultaneously collect FPM and CPM in the waste gas of fixed pollution sources, with precise temperature and flow control, high sampling efficiency, and small loss, making the monitoring results accurate and reliable. At the same time, the sampling gun 3 uses stainless steel material, and the CPM sampling component uses proportional material, which is easy to obtain and has a low manufacturing cost, making it relatively easy to achieve industrial production.

Claims

1. A novel total particulate matter sampling system in exhaust gas from a fixed pollution source, comprising an FPM filter cartridge (1) and a sampling port (2), characterized in that: The FPM filter cartridge (1) is arranged on the left side of the sampling port (2); a sampling gun (3) is arranged behind the FPM filter cartridge (1) and is arranged through the sampling port (2); a spiral condenser (4) is arranged at the rear end of the sampling gun (3); an automatic cooling water tank (5) is arranged at the rear end of the spiral condenser (4); a vacuum gauge (7) is arranged at the rear end of the automatic cooling water tank (5); a valve (701) is arranged at the rear end of the vacuum gauge (7); a vacuum pump (702) is arranged at the rear end of the vacuum gauge (7) through the valve (701) and another valve (701) is arranged on the vacuum pump (702); a dry flow meter (8) is arranged at the rear end of the vacuum pump (702); a pressure gauge (9) is arranged at the rear end of the dry flow meter (8) and an exhaust hole is arranged at the rear end; A water pump (501) and a dry shock absorption bottle group (502) are connected to the automatic refrigeration water tank (5), a buffer bottle (5021) and a silica gel shock bottle (5022) are arranged in sequence at the rear end of the dry shock absorption bottle group (502), a CPM filter membrane (503) and a thermometer (6) are arranged between the dry shock absorption bottle group (502) and the buffer bottle (5021), another thermometer (6) is arranged at the rear end of the silica gel shock bottle (5022), and a control module (504) is arranged on the automatic refrigeration water tank (5) for controlling and displaying the temperature of the automatic refrigeration water tank (5).

2. According to the novel total particulate matter sampling system in exhaust gas from stationary pollution sources as described in claim 1, it is characterized by: The sampling gun (3) is equipped with a thermocouple for controlling the temperature. The sampling gun (3) can be heated and the temperature is higher than 120°C.

3. According to the novel total particulate matter sampling system in exhaust gas from stationary pollution sources as described in claim 1, it is characterized by: The sampling gun (3) is made of stainless steel.

4. According to the novel total particulate matter sampling system in exhaust gas from stationary pollution sources as described in claim 1, it is characterized by: The automatic refrigeration water tank (5) is equipped with a thermocouple for controlling the temperature.

5. According to the novel total particulate matter sampling system in exhaust gas from stationary pollution sources as described in claim 1, it is characterized by: The CPM filter membrane (503) is equipped with a thermocouple for controlling the temperature.

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