Filter cartridge assembly and flue gas sampling device
By using sealing sheets and deformation structure design in the filter cartridge assembly, the problem of water absorption and adhesion of glass fiber filter cartridges and loose material in high-temperature smoke environments is solved, and the filter cartridges are easily removed and the accuracy of test data is achieved.
Patent Information
- Application Number
- CN202510450675.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2025-06-27
AI Technical Summary
In a high-temperature smoke environment, the glass fiber filter cartridge is prone to absorb water and adheres to the sampling gun, making it inconvenient to take it out, and the material of the filter cartridge opening becomes loose under the action of high-temperature smoke and water vapor, resulting in inaccurate test data and the filter cartridge cannot be sealed, and dust is easily spilled out and affects the weighing result.
A filter cartridge assembly is designed, including a filter cartridge, a sleeve and a sealing sheet. The sealing sheet is fixed to the opening of the filter cartridge. An opening is provided in the central area for inserting the sampling head. There is an opening at the bottom of the sleeve to allow the smoke to pass through and facilitate the removal of the filter cartridge. The cylinder port of the sleeve is provided with a deformation structure to facilitate the fixing of the sampling head.
The sealing sheet prevents the filter cartridge from sprinkling or adding impurities during transportation, drying and weighing, which solves the problem of the filter cartridge adhering to the sampling gun after absorbing water, simplifies the filter cartridge removal process, and ensures the accuracy of the test data and the quality stability of the filter cartridge.
Smart Images
Figure CN120204829A_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present disclosure belong to the technical field of measuring devices, and particularly relate to a filter cartridge assembly and a flue gas sampling device. Background Art
[0002] In the performance test of dust collectors, filter cartridges made of fiberglass are mainly used, cooperating with the sampling gun of a flue gas analyzer to collect dust, which have the characteristics of high temperature resistance, corrosion resistance, and high filtration accuracy. Generally speaking, fiberglass materials have no voids and capillary structures and do not absorb water. However, in a high-temperature soot environment, the hydrophobicity of fiberglass will decrease, and the fiberglass filter cartridge is likely to adhere to the sampling gun after absorbing water and needs to be taken out with tweezers; some materials at the filter cartridge mouth are likely to become loose under the action of high-temperature flue gas and water vapor, and touching the filter cartridge mouth during the process of taking out with tweezers is likely to cause some materials to fall off, resulting in inaccurate test data; at the same time, the filter cartridge cannot be sealed after sampling, and the dust is likely to spill out, affecting the weighing result.
[0003] In view of the above problems, it is necessary to propose a filter cartridge assembly and a flue gas sampling device with reasonable design and effective solution to the above problems. Summary of the Invention
[0004] Embodiments of the present disclosure aim to at least solve one of the technical problems existing in the prior art, and provide a filter cartridge assembly and a flue gas sampling device.
[0005] One aspect of the embodiments of the present disclosure provides a filter cartridge assembly, including a filter cartridge, a sleeve, and a sealing sheet;
[0006] The sealing sheet is fixed to the mouth of the filter cartridge, wherein an opening is provided in the central area of the sealing sheet, and the opening is used for inserting a sampling head;
[0007] The filter cartridge is arranged inside the sleeve, and the bottom of the sleeve has an opening, which can allow flue gas to pass through and facilitate taking out the filter cartridge; wherein,
[0008] A deformation structure is provided at the mouth of the sleeve. When the sampling head is fixed to the filter cartridge, a force is applied to the deformation structure to cause the mouth of the sleeve to deform and be clamped to the fixing cover of the sampling head.
[0009] Optionally, the deformation structure includes a first semi-circular ring and a second semi-circular ring, and the first semi-circular ring and the second semi-circular ring are arranged alternately.
[0010] Optionally, the fixing cover is provided with a threaded groove, and the first semi-circular ring and the second semi-circular ring are clamped in the threaded groove.
[0011] Optionally, the height of the first semi-circular ring is higher than the height of the second semi-circular ring to match the shape of the threaded groove.
[0012] Optionally, the opening of the sealing thin sheet is cross-shaped, and after the sampling head is pulled out, the sealing thin sheet at the cross-shaped opening rebounds to seal the filter cartridge.
[0013] Optionally, the sealing thin sheet is fixedly attached to the outer cylindrical wall of the filter cartridge by a high-temperature tape.
[0014] Optionally, the sealing thin sheet is made of PTFE material.
[0015] Optionally, the sleeve is made of stainless steel material.
[0016] Optionally, the size of the sleeve matches the size of the filter cartridge.
[0017] Another aspect of the embodiments of the present disclosure provides a flue gas sampling device, including a sampling head, a fixed cover, a sampling gun, and the filter cartridge assembly described above; wherein,
[0018] The sampling head and the fixed cover are integrally formed;
[0019] The tail of the sampling head passes through the opening of the sealing thin sheet and is inserted into the filter cartridge;
[0020] The sampling gun is fixedly connected to the bottom of the sleeve.
[0021] For the filter cartridge assembly and the flue gas sampling device of the embodiments of the present disclosure, by providing a sealing thin sheet at the mouth of the filter cartridge, and an opening for inserting the sampling head is provided in the central area of the sealing thin sheet. By providing the sealing thin sheet, it is possible to prevent the problem of quality change caused by the spillage or incorporation of impurities during the transportation, drying, and weighing of the filter cartridge after sampling; the filter cartridge is disposed within the sleeve, and the bottom of the sleeve has an opening that allows the flue gas to pass through and facilitates the removal of the filter cartridge, solving the problem that the filter cartridge adheres to the sampling gun and is inconvenient to remove after absorbing water; a deformation structure is provided at the mouth of the sleeve. When fixing the sampling head to the sleeve, a force is applied to the deformation structure to cause the sleeve mouth to deform and be clamped to the fixed cover of the sampling head, making it more convenient to connect the filter cartridge and the sampling head; the structure of this filter cartridge assembly is simple,
[0022] easy to manufacture, and low in cost. Description of the Drawings
[0023] Figure 1 is a schematic structural diagram of a filter cartridge assembly according to an embodiment in the embodiments of the present disclosure;
[0024] Figure 2 is a schematic structural diagram of a filter cartridge according to another embodiment in the embodiments of the present disclosure;
[0025] Figure 3Schematic structural diagram of a sleeve according to another embodiment in the embodiments of the present disclosure. Detailed implementation manners
[0026] To enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the embodiments of the present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.
[0027] As Figure 1 shown, one aspect of the embodiments of the present disclosure provides a filter cartridge assembly 100, including a filter cartridge 110, a sleeve 120, and a sealing thin sheet 130.
[0028] The sealing thin sheet 130 is fixed to the mouth of the filter cartridge 110. Among them, as Figure 2 shown, an opening 131 is provided in the central region of the sealing thin sheet 130, and the opening 131 is used for inserting a sampling head 200.
[0029] The filter cartridge 110 is disposed inside the sleeve 120. The bottom of the sleeve 120 has an opening through which flue gas can pass and it is convenient to take out the filter cartridge 110.
[0030] Among them, a deformation structure is provided at the mouth of the sleeve 120. When the sampling head 200 is fixed to the sleeve 120, a force is applied to the deformation structure to cause the mouth of the sleeve 120 to deform and be clamped to the fixing cover 300 of the sampling head 200.
[0031] Specifically, the sealing thin sheet 130 is fixed to the mouth of the filter cartridge 110, the filter cartridge 110 is placed inside the sleeve 120, a force is applied to the deformation structure of the sleeve 120 to cause the mouth of the sleeve 120 to deform and be clamped to the fixing cover 300 of the sampling head 200, and then the filter cartridge 110 is connected to the sampling head 200. The sampling head 200 is installed on the sampling gun and extended into the inlet / outlet flue of the dust collector to start sampling.
[0032] After sampling, the sampling head 200 is unscrewed from the sampling gun. Since the sleeve 120 is clamped to the fixing cover of the sampling head 200, the filter cartridge 110 is taken out together, eliminating the step of using tweezers to take out the filter cartridge 110 and avoiding surface damage caused during the process of taking out the filter cartridge 110. After the sleeve 120 is taken out from the thread groove of the sampling head, the opening of the sealing thin sheet 130 automatically rebounds to seal the mouth of the filter cartridge 110, and there will be no mass loss during subsequent transportation, drying, and weighing processes. The filter cartridge 110 can be ejected by gently poking it from the opening at the bottom of the sleeve 120, which is convenient for taking out the filter cartridge 110.
[0033] The filter cartridge assembly according to the embodiments of the present disclosure is provided with a sealing thin sheet at the mouth of the filter cartridge. An opening for inserting a sampling head is provided in the central area of the sealing thin sheet. By providing the sealing thin sheet, it is possible to prevent problems of quality change caused by the spillage or incorporation of impurities during the transportation, drying, and weighing of the filter cartridge after sampling; the filter cartridge is arranged in the sleeve, and the bottom of the sleeve has an opening through which flue gas can pass and the filter cartridge can be conveniently taken out, solving the problem that the filter cartridge is inconvenient to take out because it adheres to the sampling gun after absorbing water; a deformation structure is provided at the mouth of the sleeve. When the sampling head is fixed to the sleeve, a force is applied to the deformation structure to cause the mouth of the sleeve to deform and be clamped to the fixing cover of the sampling head, so as to more conveniently connect the filter cartridge with the sampling head; the filter cartridge assembly has a simple structure, is easy to manufacture, and is inexpensive.
[0034] Exemplarily, as Figure 1 and Figure 3 shown, the deformation structure includes a first semi-circular ring 141 and a second semi-circular ring 142, and the first semi-circular ring 141 and the second semi-circular ring 142 are arranged alternately.
[0035] Specifically, in this embodiment, the first semi-circular ring 141 and the second semi-circular ring 142 are made of stainless steel material, and the stainless steel material has a certain elasticity. When fixing the sleeve 120 to the fixing cover 300 of the sampling head 200, the first semi-circular ring 141 and the second semi-circular ring 142 can be pinched by hand to make the first semi-circular ring 141 and the second semi-circular ring 142 at the mouth of the sleeve 120 move inward and alternately to deform, and then the first semi-circular ring 141 and the second semi-circular ring 142 are clamped in the fixing cover 300 of the sampling head 200, so as to fix the sleeve 120 to the fixing cover 300 of the sampling head 200, and further realize the connection between the filter cartridge 120 and the sampling head 200.
[0036] Exemplarily, as Figure 1 shown, the fixing cover 300 is provided with a threaded groove 310, and the first semi-circular ring 141 and the second semi-circular ring 142 are clamped in the threaded groove.
[0037] Exemplarily, as Figure 1 and Figure 3 shown, the height of the first semi-circular ring 141 is higher than the height of the second semi-circular ring 141 to match the shape of the threaded groove 310, so as to better fix the sleeve 120 to the fixing cover 310.
[0038] Exemplarily, as Figure 2 shown, the opening 131 of the sealing thin sheet 130 is cross-shaped. Among them, after the sampling head 200 is pulled out, the sealing thin sheet at the cross-shaped opening 131 rebounds to seal the filter cartridge 110, which can effectively prevent dust from spilling out.
[0039] Exemplarily, as Figure 2As shown, the sealing sheet 130 is fixedly adhered to the outer cylindrical wall of the filter cartridge 110 through a high-temperature tape 150.
[0040] Exemplarily, the sealing sheet 130 is made of PTFE material. The PTFE material is not easily deformed in a high-temperature environment (below 200 °C) and has a certain elasticity.
[0041] Exemplarily, the sleeve 120 is made of stainless steel material. Specifically, the whole sleeve 120 is made of 316L stainless steel material, which will not rust under the action of high-temperature flue gas (below 200 °C) and water vapor and can be reused for a long time. At the same time, stainless steel has a certain elasticity and can be stuck in the thread groove of the sampling head.
[0042] Exemplarily, the size of the sleeve 120 matches the size of the filter cartridge 110, so that when the sleeve 120 is separated from the sampling head 200, the filter cartridge 110 can be taken out together, eliminating the step of using tweezers to take out the filter cartridge and avoiding surface damage caused during the process of taking out the filter cartridge.
[0043] Another aspect of the embodiments of the present disclosure provides a flue gas sampling device, including a sampling head 200, a fixing cover 300, a sampling gun 400, and the filter cartridge assembly 100 described above; the specific structural features of the filter cartridge assembly 100 have been described in detail above and will not be elaborated here.
[0044] Among them, the sampling head 200 and the fixing cover 300 are integrally formed; the tail of the sampling head 200 passes through the opening of the sealing sheet 130 and is inserted into the filter cartridge 110; the sampling gun 400 is fixedly connected to the bottom of the sleeve 120.
[0045] The flue gas sampling device of the embodiments of the present disclosure adopts the filter cartridge assembly described above. The filter cartridge assembly is provided with a sealing sheet at the mouth of the filter cartridge, and an opening for inserting the sampling head is provided in the central area of the sealing sheet. By setting the sealing sheet, it is possible to prevent problems of quality change caused by the spillage or incorporation of impurities during the transportation, drying, and weighing of the filter cartridge after sampling; the filter cartridge is arranged in the sleeve, and the bottom of the sleeve has an opening through which the flue gas can pass and it is convenient to take out the filter cartridge, solving the problem that the filter cartridge adheres to the sampling gun and is inconvenient to take out after absorbing water; a deformation structure is provided at the mouth of the sleeve. When the sampling head is fixed to the sleeve, a force is applied to the deformation structure to cause the sleeve mouth to deform and be clamped to the fixing cover of the sampling head, making it more convenient to connect the filter cartridge to the sampling head; this filter cartridge assembly has a simple structure, is easy to manufacture, and is inexpensive.
[0046] Standard sampling process:
[0047] Filter Cartridge Preparation: Number the qualified filter cartridges and place them in an oven. Bake them at a constant temperature of 105°C - 110°C for 2 hours, then put them into a special filter cartridge weighing bottle and place it in a desiccator to cool to room temperature. Weigh the cooled filter cartridge on a balance with a sensitivity of 0.01 mg and record it. Under constant temperature and humidity conditions, repeat the above operation. The difference between the two weighings of the same filter cartridge should not exceed 0.3 mg.
[0048] After leak-checking the sampling device, start sampling. During sampling, the sampling nozzle should be aligned with the air flow direction, and the deviation should not be greater than 5°. For ordinary sampling tubes, isokinetic sampling is carried out by the predicted flow rate method. The pressure balance type isokinetic sampling device samples directly. During sampling, use the moving sampling method, that is, use the same filter cartridge to conduct isokinetic sampling at the same time for each measuring point on the same axis. Take 3 samples each time. The sampling time depends on the dust particle concentration. It is required that the sampling time and flow rate should ensure a final increase of 3 mg in the filter cartridge.
[0049] After sampling is completed, put the sampled filter cartridge and two constant weight filter cartridges into the oven and bake them at a constant temperature of 105°C - 110°C for 2 hours. After baking, put the filter cartridge into a special weighing bottle, place it in a desiccator to cool to room temperature, then weigh the filter cartridge on a balance with a sensitivity of 0.01 mg and record it. Under constant temperature and humidity conditions, repeat the above operation. If the difference between the two weighings of the same filter cartridge does not exceed 0.3 mg, it is considered that the weighing result of the sampling filter cartridge is within the quality control range and the result is reliable.
[0050] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the embodiments of the present disclosure. However, the embodiments of the present disclosure are not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the embodiments of the present disclosure, and these modifications and improvements are also regarded as the protection scope of the embodiments of the present disclosure.
Claims
1. A filter cartridge assembly, characterized in that: Including filter cartridge, sleeve and sealing sheet; The sealing sheet is fixed to the mouth of the filter cartridge, wherein an opening is provided in the central area of the sealing sheet, and the opening is used for inserting a sampling head; The filter cartridge is arranged in the sleeve, and the bottom of the sleeve has an opening, and the opening allows smoke to pass through and facilitates the removal of the filter cartridge; wherein, The mouth of the sleeve is provided with a deformation structure. When the sampling head is fixed to the sleeve, a force is applied to the deformation structure to deform the mouth of the sleeve so as to clamp the fixing cover of the sampling head.
2. The filter cartridge assembly according to claim 1, characterized in that: The deformation structure includes a first semicircular ring and a second semicircular ring, and the first semicircular ring and the second semicircular ring are alternately arranged.
3. The filter cartridge assembly according to claim 2, characterized in that: The fixing cover is provided with a thread groove, and the first semicircular ring and the second semicircular ring are clamped in the thread groove.
4. The filter cartridge assembly according to claim 3, characterized in that: The height of the first semicircular ring is higher than that of the second semicircular ring to match the shape of the thread groove.
5. The filter cartridge assembly according to any one of claims 1 to 3, characterized in that: The opening of the sealing sheet is in a cross shape, wherein after the sampling head is pulled out, the sealing sheet at the cross-shaped opening rebounds to close the filter cartridge.
6. The filter cartridge assembly according to any one of claims 1 to 3, characterized in that: The sealing sheet is fixed to the outer cylinder wall of the filter cylinder by means of high temperature adhesive tape.
7. The filter cartridge assembly according to any one of claims 1 to 3, characterized in that: The sealing sheet is made of PTFE material.
8. The filter cartridge assembly according to any one of claims 1 to 3, characterized in that: The sleeve is made of stainless steel.
9. The filter cartridge assembly according to any one of claims 1 to 3, characterized in that: The size of the sleeve matches the size of the filter cartridge.
10. A smoke sampling device, characterized in that: It comprises a sampling head, a fixing cover, a sampling gun and a filter cartridge assembly according to any one of claims 1 to 9; wherein, The sampling head and the fixing cover are integrally formed; The tail of the sampling head passes through the opening of the sealing sheet and is inserted into the filter cartridge; The sampling gun is fixedly connected to the bottom of the sleeve.