A sampling device for high-concentration hydrogen fluoride in hazardous waste incineration flue gas

Abstract

The utility model relates to a kind of sampling device of high concentration hydrogen fluoride in hazardous waste incineration flue gas, it is characterized by: including handheld tube and the sampling outer tube of rear end with handheld tube front end detachable connection, the front end of the sampling outer tube is equipped with sampling tube, filter cartridge and pitot tube, the filter cartridge is connected in series on the sampling tube near its inlet position, sampling tube successively passes through sampling outer tube and handheld tube and from handheld tube tail end stretches out, the pitot tube successively passes through sampling outer tube and handheld tube and from handheld tube tail end stretches out, the sampling outer tube, sampling tube, filter cartridge and pitot tube are all made of polytetrafluoroethylene material, the handheld tube is made of titanium alloy material. The sampling device of high concentration hydrogen fluoride in hazardous waste incineration flue gas is reasonably designed, can be applicable to the sampling of high concentration hydrogen fluoride flue gas, and sampling device can be reused.

Description

Technical fields: This utility model relates to the field of environmental monitoring technology, and in particular to a sampling device for high concentrations of hydrogen fluoride in flue gas from hazardous waste incineration. Background technology: Fluorochemical companies generate various fluoride-containing waste gases and liquids during production, which must be treated to meet standards before being discharged. To dispose of these hazardous fluoride-containing wastes, it is necessary to build dedicated incinerators to treat them. In accordance with requirements, the performance of the incinerators must be tested regularly to measure indicators such as hydrogen fluoride concentration and flue gas temperature.

[0001] Existing methods for detecting hydrogen fluoride involve sampling and analyzing high concentrations (20%-30% by mass) of hydrogen fluoride in incinerators for hazardous waste from fluorochemical industries. However, the internal pipes and external surfaces of the sampling equipment are easily corroded, requiring replacement after only one or two uses, resulting in waste. Furthermore, damage to any accessory in the sampling equipment necessitates returning it to the factory for repair or even scrapping it, also leading to waste. Summary of the Invention: In view of the problems existing in the prior art, the purpose of this utility model is to provide a sampling device for high concentration hydrogen fluoride in hazardous waste incineration flue gas. This sampling device for high concentration hydrogen fluoride in hazardous waste incineration flue gas is reasonably designed, can be used for sampling high concentration hydrogen fluoride flue gas, and the sampling device can be reused.

[0002] This utility model is implemented using the following solution. This utility model relates to a sampling device for high-concentration hydrogen fluoride in flue gas from hazardous waste incineration. The device comprises a handheld tube and a sampling outer tube detachably connected to the front end of the handheld tube. The front end of the sampling outer tube is provided with a sampling tube, a filter cylinder, and a Pitot tube. The filter cylinder is connected in series on the sampling tube near its inlet. The sampling tube passes through the sampling outer tube and the handheld tube in sequence and extends out from the tail end of the handheld tube. The Pitot tube passes through the sampling outer tube and the handheld tube in sequence and extends out from the tail end of the handheld tube. The sampling outer tube, sampling tube, filter cylinder, and Pitot tube are all made of polytetrafluoroethylene (PTFE), and the handheld tube is made of titanium alloy.

[0003] Preferably, a polytetrafluoroethylene (PTFE) filter membrane is installed in the filter cartridge.

[0004] Preferably, a temperature sensor is installed between the sampling tube and the pitot tube.

[0005] Preferably, the rear end of the sampling outer tube and the front end of the handheld tube are detachably connected by threads.

[0006] Preferably, the front end of the sampling tube has a sealing plate, the sampling tube and the pitot tube pass through a perforation on the sealing plate, and sealant is applied around the sampling tube and the pitot tube and the perforation.

[0007] Preferably, the sampling tube and the pitot tube are provided with a detachable connection structure at the position where they extend into the outer sampling tube.

[0008] Preferably, the detachable connection structure is a threaded connection structure.

[0009] The working principle of this utility model sampling device for high-concentration hydrogen fluoride in hazardous waste incineration flue gas is as follows: During use, the sampling outer tube, sampling tube, filter cylinder, and Pitot tube are all inserted into the incinerator. The sampling tube and Pitot tube pass through the sampling outer tube and the handheld tube in sequence and extend from the tail end of the handheld tube. The extended end is connected to the corresponding testing equipment (such as hydrogen fluoride testing equipment). Since the sampling outer tube, sampling tube, filter cylinder, and Pitot tube are all made of polytetrafluoroethylene (PTFE), they can be protected from corrosion and damage by hydrogen fluoride during use, which would affect the test results. At the same time, the service life of this utility model sampling device can be improved. Attached image description: The present invention will be further described below with reference to the accompanying drawings; Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 , 3 yes Figure 1 A partial view; Figure 4 It is a partial cross-sectional view of the sampling tube and the pitot tube extending into the outer sampling tube; Figure 5 This is a schematic diagram of the construction of a Pitot tube (i.e.) Figure 2 (Top view of the medium-sized pitot tube). Figure 6 yes Figure 5 A schematic diagram showing the addition of a temperature sensor; Figure 7 This is a cross-sectional view of the connection between the sampling outer tube and the handheld tube; Figure 8 yes Figure 2 A schematic diagram of another embodiment. Detailed implementation method: The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0010] This utility model relates to a sampling device for high-concentration hydrogen fluoride in hazardous waste incineration flue gas. The device includes a handheld tube 1 and a sampling outer tube 2 whose rear end is detachably connected to the front end of the handheld tube 1 (the rear end of the sampling outer tube 2 is detachably connected to the front end of the handheld tube 1 via threads). The front end of the sampling outer tube 2 is equipped with a sampling tube 3, a filter cylinder 4, and a Pitot tube 5. The filter cylinder 4 is connected in series on the sampling tube 3 near its inlet. The sampling tube 3 passes through the sampling outer tube 2 and the handheld tube 1 in sequence and extends out from the tail end of the handheld tube 1. The Pitot tube 5 passes through the sampling outer tube 2 and the handheld tube 1 in sequence and extends out from the tail end of the handheld tube. The sampling outer tube, sampling tube, filter cylinder, and Pitot tube are all made of polytetrafluoroethylene (PTFE), and the handheld tube 1 is made of titanium alloy. To filter particulate matter entering the sampling tube 3 (preventing particulate matter from entering subsequent testing equipment), a PTFE filter membrane 6 is installed in the filter cylinder 4.

[0011] In order to detect the temperature in the incinerator, a temperature sensor 7 is installed between the sampling tube 3 and the pitot tube 5. The temperature sensor 7 and the signal transmission line 8 are also detachably connected. The ends of the temperature sensor 7 and the signal transmission line 8 are connected by plug-in electrical connection to achieve detachable connection.

[0012] In one embodiment, the front end of the sampling tube 2 has a sealing plate 201, the sampling tube 3 and the Pitot tube 5 pass through the perforation on the sealing plate, and the sampling tube and the Pitot tube and the perforation are coated with sealant 202 to achieve sealing.

[0013] In another embodiment, the sampling tube and the pitot tube are provided with a detachable connection structure 9 at the position where they extend into the outer sampling tube. This detachable connection structure is a threaded connection structure, which can be removed and replaced when the sampling tube and the pitot tube are damaged, without having to return them to the factory for repair, thereby improving the service life and efficiency of the device.

[0014] A hand handle 10 is provided at the rear of the hand tube 1 for easy hand holding, and a rubber gasket 11 is installed at the threaded connection between the sampling outer tube 2 and the hand tube 1 to improve the sealing performance.

[0015] The working principle of this utility model sampling device for high-concentration hydrogen fluoride in hazardous waste incineration flue gas is as follows: During use, the sampling outer tube, sampling tube, filter cylinder, and Pitot tube are all inserted into the incinerator. The sampling tube and Pitot tube pass through the sampling outer tube and the handheld tube in sequence and extend from the tail end of the handheld tube. The extended end is connected to the corresponding testing equipment (such as hydrogen fluoride testing equipment). Since the sampling outer tube, sampling tube, filter cylinder, and Pitot tube are all made of polytetrafluoroethylene (PTFE), they can be protected from corrosion and damage by hydrogen fluoride during use, which would affect the test results. At the same time, the service life of this utility model sampling device can be improved.

[0016] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A sampling device for high-concentration hydrogen fluoride in hazardous waste incineration flue gas, characterized in that: The device includes a handheld tube and a sampling outer tube detachably connected to the front end of the handheld tube. The front end of the sampling outer tube is provided with a sampling tube, a filter cylinder, and a Pitot tube. The filter cylinder is connected in series on the sampling tube near its inlet. The sampling tube passes through the sampling outer tube and the handheld tube in sequence and extends out from the tail end of the handheld tube. The Pitot tube passes through the sampling outer tube and the handheld tube in sequence and extends out from the tail end of the handheld tube. The sampling outer tube, sampling tube, filter cylinder, and Pitot tube are all made of polytetrafluoroethylene (PTFE), and the handheld tube is made of titanium alloy.

2. The sampling device for high-concentration hydrogen fluoride in hazardous waste incineration flue gas according to claim 1, characterized in that: The filter cartridge is equipped with a polytetrafluoroethylene filter membrane.

3. The sampling device for high-concentration hydrogen fluoride in hazardous waste incineration flue gas according to claim 1, characterized in that: A temperature sensor is installed between the sampling tube and the pitot tube.

4. The sampling device for high-concentration hydrogen fluoride in hazardous waste incineration flue gas according to claim 1, characterized in that: The rear end of the sampling outer tube is detachably connected to the front end of the handheld tube via threads.

5. The sampling device for high-concentration hydrogen fluoride in hazardous waste incineration flue gas according to claim 1, characterized in that: The front end of the sampling tube has a closed plate, and the sampling tube and Pitot tube pass through a perforation on the closed plate. The sampling tube and Pitot tube are coated with sealant around the perforation.

6. The sampling device for high-concentration hydrogen fluoride in hazardous waste incineration flue gas according to claim 1, characterized in that: The sampling tube and pitot tube are provided with a detachable connection structure at the position where they extend into the outer sampling tube.

7. The sampling device for high-concentration hydrogen fluoride in hazardous waste incineration flue gas according to claim 6, characterized in that: The detachable connection structure is a threaded connection structure.

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