CN215178980U - Heating type flue gas sampling probe rod - Google Patents
Heating type flue gas sampling probe rod Download PDFInfo
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- CN215178980U CN215178980U CN202121190677.8U CN202121190677U CN215178980U CN 215178980 U CN215178980 U CN 215178980U CN 202121190677 U CN202121190677 U CN 202121190677U CN 215178980 U CN215178980 U CN 215178980U
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Abstract
The utility model relates to an add fever type flue gas sampling probe rod, it includes filter, sampling tube, is arranged in heating system and the mounting flange of heating flue gas in the sampling tube, and the both ends of sampling tube are connected with filter, mounting flange respectively. The heating system comprises a heating rod, a heating sleeve and a temperature controller used for controlling the heating rod and the heating sleeve, the sampling tube is arranged between the heating rod and the heating sleeve, and the inner wall of the sampling tube is coated with a high-temperature-resistant corrosion-resistant coating. The sampling tube comprises a front connecting end connected with the filter, a rear connecting end connected with the fixing flange and a sampling part which is positioned between the front connecting end and the rear connecting end and is spirally wound on the periphery of the heating rod. The heating type smoke sampling probe rod further comprises a heat insulation shell and a heat insulation layer filled between the heat insulation shell and the heating sleeve. The utility model discloses the flue gas that can avoid the sampling dew appears and influences its monitoring value, avoids the dust influence in the flue gas to detect the precision to can improve flue gas measurement accuracy.
Description
Technical Field
The utility model relates to a flue gas purification technical field, concretely relates to add fever type flue gas sampling probe rod.
Background
Sulfur dioxide and other pollutants are important indexes of smoke emission pollutants and need to be monitored in the process of acceptance of environmental protection equipment and comparison of environmental protection emission indexes. With the increasingly strict requirements of environmental emission indexes, the online monitoring accuracy and stability of pollutant emission of industrial enterprises become more important. However, when the smoke pollutants are monitored on line, the concentration monitoring value of the acidic pollutants with high solubility in water, such as sulfur dioxide, often generates a sudden phenomenon, and even generates a long-time false standard exceeding condition after the sudden phenomenon. The high-humidity flue gas is condensed in the sampling tube in the flue gas sampling process, so that the concentration of pollutants is suddenly increased, the accurate and stable measurement of the pollutants such as the concentration of sulfur dioxide is influenced, and the stable and accurate measurement cannot be provided for pollution discharge and discharge of enterprises. In the flue gas sampling process, dust can enter the sampling tube along with the flue gas, so that the gas circuit of the rear-end pollutant measuring unit is blocked, and even the measuring precision of the sensor is influenced. Therefore, there is a need for improvements in existing flue gas sampling devices.
Disclosure of Invention
The utility model aims at providing a can prevent that the flue gas from dewfall, improve follow-up measurement accuracy's fever type flue gas sampling probe rod.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides a heating type flue gas sampling probe rod, is including filter, sampling tube, the heating that is arranged in filtering dust in the flue gas heating system and mounting flange of flue gas in order to prevent its dewfall in the sampling tube, the both ends of sampling tube respectively with the filter mounting flange is connected.
Heating system includes heating rod, heating sleeve and is used for control the heating rod with heating sleeve's temperature controller, heating sleeve cover is located the heating rod periphery, the sampling tube set up in the heating rod with between the heating sleeve.
The sampling tube include with the preceding link that the filter is connected, with back link that mounting flange is connected and be located preceding link with sample portion between the back link, sample portion spiral around locating the periphery of heating rod.
The cross section of the front connecting end and the cross section of the rear connecting end are circular, and the cross section of the sampling part is rectangular.
The heating sleeve comprises a heating wire controlled by the temperature controller and a carrier wrapping the heating wire.
The heating type smoke sampling probe rod further comprises a heat-insulating shell, the sampling tube and the heating device are arranged in the heat-insulating shell, and the filter and the fixing flange are arranged at two ends of the heat-insulating shell respectively.
The heating type smoke sampling probe rod further comprises a heat insulation layer filled between the heat insulation shell and the heating sleeve.
The sampling tube is a steel tube.
The inner wall of the sampling tube is coated with a high-temperature-resistant corrosion-resistant coating.
The filter is a corundum filter.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the utility model discloses the flue gas that can avoid the sampling dew appears and influences its monitoring value, avoids the dust influence in the flue gas to detect the precision to can improve flue gas measurement accuracy.
Drawings
Fig. 1 is a schematic view of the heating type smoke sampling probe rod of the present invention.
Figure 2 is the utility model discloses a heating type flue gas sampling probe rod is with the schematic diagram of the part except heating sleeve and heat preservation.
Fig. 3 is the cross-sectional view of the probe rod main body in the heating type flue gas sampling probe rod of the present invention.
Fig. 4 is a schematic view of a heating device in the heating type smoke sampling probe rod of the present invention.
In the above drawings: 1. a filter; 2. a sampling tube; 3. heating the sleeve; 4. a heat-insulating shell; 5. a heating rod; 6. a fixed flange; 7. a heat-insulating layer; 8. heating wires; 9. a temperature controller.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings.
The first embodiment is as follows: as shown in fig. 1 to 4, a heating type smoke sampling probe rod mainly comprises a filter 1, a sampling tube 2, a heating system and a fixing flange 6.
The filter 1 is used for filtering dust in flue gas, and corundum (Al) is adopted in the embodiment2O3) The filter 1 has the filtering precision of 1.5-4.5 microns, the maximum working pressure of 0.0.1MPa, the maximum working temperature of 1400 ℃ and is made of a fireproof corrosion-resistant material. The filter 1 prevents soot from clogging the rear end contaminant measurement unit and affecting sensor accuracy.
One end of the sampling tube 2 is connected with the filter 1, so that the smoke filtered to dust through the filter 1 can enter the sampling tube 2, the other end of the sampling tube 2 is connected with the fixing flange 6, the fixing flange 6 is used for installing the heating type smoke sampling probe rod at a specified position, and the smoke in the sampling tube 2 is sent into the specified device through the fixing flange 6. The sampling tube 2 is made of a steel tube, i.e. the material of the sampling tube is 304 or 316L stainless steel, and the inner wall of the sampling tube is coated with a high-temperature-resistant corrosion-resistant coating, such as a Teflon coating. The coating has the advantages of high temperature resistance, wear resistance, self lubrication (the friction coefficient is extremely low), corrosion resistance, strong acid and alkali resistance and the like, can be continuously used at the high temperature of 260 ℃, has the highest use temperature of 300 ℃ and the friction coefficient of only 0.02-0.1, can reduce the adsorption of pollutants on the surface of the coating, and has good wear resistance and excellent chemical stability.
The heating system is used for heating the smoke in the sampling tube 2 to prevent the smoke from dewing. In this embodiment, the heating system includes a heating rod 5, a heating sleeve 3, and a temperature controller 9. The heating rod 5 is located to the periphery of heating sleeve 3 cover, includes many (for example 4~ 8) heater strips 8 and the carrier of parcel heater strip 8, and it is the rectangle that the attached drawing 4 shows after expanding. The temperature controller 9 is respectively connected with the heating rod 5 and the heating wire 8 in the heating sleeve 3, thereby controlling the heating rod 5 and the heating sleeve 3. The temperature controller 9 may be provided at a suitable position as required. Based on this, sampling tube 2 sets up between heating rod 5 and heating sleeve 3 to can utilize heating rod 5 and heating sleeve 3 to heat the flue gas in sampling tube 2 in step, heating temperature is controlled by temperature controller 9, and the highest heating temperature of heating sleeve 3 can reach 210 ℃.
The sampling tube 2 is divided into three parts, namely a front connecting end connected with the filter 1, a rear connecting end connected with the fixing flange 6 and a sampling part positioned between the front connecting end and the rear connecting end. Wherein, the sampling part is spirally wound on the periphery of the heating rod 5. The section of the front connecting end and the section of the rear connecting end of the sampling tube 2 are circular, the tube diameter is 8-10 mm, the section of the sampling part of the sampling tube 2 is rectangular, and the length-width ratio is 2: 1-4: 1.
The sampling tube 2 is spirally arranged around the heating rod 5, so that the length of the sampling tube 2 is prolonged, the heating retention time of the flue gas in the sampling tube 2 is increased, and the heating effect is enhanced. The sampling part of the sampling tube 2 with the rectangular cross section increases the contact heat exchange area between the sampling tube 2 and the heating rod 5.
In addition, this heating type flue gas sampling probe rod still includes lagging casing 4 (also can be called as the sample outer tube), and sampling tube 2 and heating device all set up in lagging casing 4, and filter 1 and mounting flange 6 set up respectively at the both ends of lagging casing 4. And heat insulation materials such as asbestos can be filled between the heat insulation shell 4 and the heating sleeve 3 to form a heat insulation layer 7, so that heat exchange between external low-temperature flue gas and flue gas in the sampling tube 2 is prevented, and the heating and gasifying effect of moisture in the flue gas is further improved.
The heat preservation shell 4, the heat preservation layer 7, the heating device and the sampling tube 2 jointly form a probe rod main body of the heating type flue gas sampling probe rod. The filter 1 and the probe rod main body are split and are connected by threads. The heating rod 5 is located in the center of the probe body and is parallel to the probe body, i.e. the heating rod 5 is coaxial with the probe body.
Insulating casing 4 and sampling tube 2 adopt the precision welding technique to carry out integrative encapsulation, and sampling tube 2 welds with mounting flange 6 for can be fixed in the flue wall with flue gas sampling probe rod through mounting flange 6 on, thereby utilize flue gas sampling probe rod to bleed the sample in the flue.
The whole length of the smoke sampling probe rod can be set to be 1m, 1.5m, 2m, 2.5m, 3m, 3.5m, 4m and the like as required, the specific length setting can be carried out according to the cross section area of the flue, and single-point sampling or matrix arrangement multi-point sampling is carried out at the center of the flue.
According to the scheme, the problem that in the flue gas sampling process, high-humidity flue gas causes sudden jump of pollutant concentration due to condensation of the sampling tube 2, the concentration of pollutants such as sulfur dioxide is influenced, and the problem that the concentration of the pollutants is accurate and stable in measurement is solved, dust enters the sampling tube 2 along with the flue gas in the flue gas sampling process, and the gas circuit of a rear-end pollutant measurement unit is blocked, and even the measurement precision of a sensor is influenced is solved. The beneficial effects are that:
1. the utility model discloses arrange 2 spiral winding of sampling tube in the 5 positions of heating rod, the extraction in-process makes the flue gas produce centrifugal force, reduces the 2 inside dewfall circumstances of sampling tube. Spiral winding's sampling tube 2 is heated by heating rod 5, has prolonged the effective length of sampling tube 2, increases the heating dwell time of flue gas in sampling tube 2, promotes droplet heating gasification effect. In the process of sampling at constant speed or constant flow, under the condition of the same heating temperature, the vaporization effect of the fog drops in the flue gas is further improved. The spiral arrangement can effectively prevent the condensation of the flue gas in the pipe and reduce the SO caused by the condensation of the flue gas2And the jump phenomenon of acidic pollutants.
2. A corundum filter is fixed at the front end of the smoke sampling probe rod, dust in smoke is filtered, and the smoke is prevented from blocking a pollutant measuring unit at the rear end of the sampling probe rod and affecting the precision of the sensor.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. The utility model provides a heating type flue gas sampling probe rod which characterized in that: heating type flue gas sample probe rod is including filter, the sampling tube that is arranged in filtering the dust in the flue gas, be used for the heating system and mounting flange of flue gas in order to prevent its dewfall in the sampling tube, the both ends of sampling tube respectively with the filter mounting flange is connected.
2. The heating type flue gas sampling probe rod of claim 1, wherein: heating system includes heating rod, heating sleeve and is used for control the heating rod with heating sleeve's temperature controller, heating sleeve cover is located the heating rod periphery, the sampling tube set up in the heating rod with between the heating sleeve.
3. The heating type flue gas sampling probe of claim 2, wherein: the sampling tube include with the preceding link that the filter is connected, with back link that mounting flange is connected and be located preceding link with sample portion between the back link, sample portion spiral around locating the periphery of heating rod.
4. The heating type flue gas sampling probe of claim 3, wherein: the cross section of the front connecting end and the cross section of the rear connecting end are circular, and the cross section of the sampling part is rectangular.
5. The heating type flue gas sampling probe of claim 2, wherein: the heating sleeve comprises a heating wire controlled by the temperature controller and a carrier wrapping the heating wire.
6. The heating type flue gas sampling probe of claim 2, wherein: the heating type smoke sampling probe rod further comprises a heat-insulating shell, the sampling tube and the heating system are arranged in the heat-insulating shell, and the filter and the fixing flange are arranged at two ends of the heat-insulating shell respectively.
7. The heating type flue gas sampling probe of claim 6, wherein: the heating type smoke sampling probe rod further comprises a heat insulation layer filled between the heat insulation shell and the heating sleeve.
8. The heating type flue gas sampling probe rod of claim 1, wherein: the sampling tube is a steel tube.
9. The heating type flue gas sampling probe rod of claim 1, wherein: the inner wall of the sampling tube is coated with a high-temperature-resistant corrosion-resistant coating.
10. The heating type flue gas sampling probe rod of claim 1, wherein: the filter is a corundum filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121190677.8U CN215178980U (en) | 2021-05-31 | 2021-05-31 | Heating type flue gas sampling probe rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121190677.8U CN215178980U (en) | 2021-05-31 | 2021-05-31 | Heating type flue gas sampling probe rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215178980U true CN215178980U (en) | 2021-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121190677.8U Active CN215178980U (en) | 2021-05-31 | 2021-05-31 | Heating type flue gas sampling probe rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215178980U (en) |
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2021
- 2021-05-31 CN CN202121190677.8U patent/CN215178980U/en active Active
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