External positive pressure working condition additional module and smoke dust direct reading equipment
By designing an external positive pressure additional module, the blower is used to extract the water vapor from the flue gas, the data inaccuracy problem caused by the condensation deposition of direct smoke reading equipment under positive pressure is solved, and the data accuracy and module flexibility are achieved.
Patent Information
- Application Number
- CN202421679304.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the positive pressure condition of existing smoke direct reading equipment, the condensate in the flue gas deposited on the paper tape, resulting in inaccurate test data.
An external positive pressure additional module is designed, including an adapter, a blower and a check valve. The sampling pipe and the sampling main machine are connected through the connecting pipe, and the water vapor in the flue gas is extracted by the blower to prevent condensate water from depositing on the paper tape.
It effectively avoids the deposition of condensate on the paper tape, ensures the accuracy of the test data, and the module is a detachable structure, flexible and practical.
Smart Images
Figure CN223078138U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of smoke and dust sampling and detection equipment, and particularly relates to an external positive pressure working condition additional module and a direct-reading smoke and dust device. Background Art
[0002] The flue gas emitted by fixed pollution sources such as thermal power plants, chemical plants, and cement plants is one of the important sources of air pollutants. Its emission volume and emission gas components need to be strictly monitored by the environmental protection department, and parameters such as the type, concentration, and total amount of the emitted flue gas need to be measured through various flue gas analysis systems.
[0003] Currently, the direct-reading devices for testing the particulate matter concentration of fixed pollution sources on the market generally adopt the beta-ray absorption method. Its structure includes a sampling tube and a sampling main unit. A paper feeding mechanism and a beta-ray detection unit are arranged in the sampling main unit, and after the smoke and dust are deposited on the paper tape, they are detected by the beta-ray detection unit. When the existing direct-reading device samples under positive pressure working conditions, during the detection process of the beta-ray detection unit, the flue gas in the chimney will spray out from the sampling nozzle of the direct-reading device, and the water vapor contained in the flue gas will condense into water droplets inside the device, and the water droplets will adhere to the paper tape, resulting in deviation of the test data. Summary of the Invention
[0004] Aiming at the technical problem that the existing direct-reading smoke and dust device is easily affected by condensed water under positive pressure working conditions, the utility model provides an external positive pressure working condition additional module that can avoid the deposition of condensed water in the flue gas on the paper tape during the detection process of the beta-ray unit and is convenient for disassembly, and a direct-reading smoke and dust device with this module.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0006] An external positive pressure working condition additional module includes an adapter and a blower. The inlet end of the adapter is provided with a sampling tube joint, the outlet end of the adapter is provided with a sampling main unit joint, the lower part of the adapter is communicated with the air suction port of the blower through a connecting pipe, and a check valve is installed in the connecting pipe.
[0007] Preferably, a fixing plate is further connected between the adapter and the blower.
[0008] Preferably, the middle part of the adapter is set to be flared.
[0009] Preferably, an extension part connecting the flare is arranged in the sampling tube joint, and a drain port is arranged at the lower part of the extension part.
[0010] Preferably, a sealing groove is arranged in the sampling tube joint, and a sealing ring is installed in the sealing groove.
[0011] Preferably, a sealing groove is provided on the outer wall of the sampling host joint, and a sealing ring is installed in the sealing groove.
[0012] The utility model also proposes a direct soot reading device, which includes a sampling pipe and a sampling host. An external positive pressure working condition additional module as described above is connected between the sampling pipe and the sampling host.
[0013] Compared with the prior art, the advantages and positive effects of the utility model are as follows:
[0014] The direct soot reading device of the utility model with an external positive pressure working condition additional module can, when deposition is completed, draw away the gas in the sampling pipe through the external positive pressure working condition additional module, avoiding the problem that during the detection process of the beta-ray unit, flue gas enters the sampling host and condenses into condensate, which deposits on the paper tape, thus well solving the problem of inaccurate data caused by the generation of condensate under positive pressure working conditions. The external positive pressure working condition additional module is an independent module and is set as a detachable structure, which can be assembled according to needs and is flexible and practical. Description of the Drawings
[0015] Figure 1 is a schematic structural diagram of the direct soot reading device of the utility model;
[0016] Figure 2 is a partial cross-sectional view of the direct soot reading device of the utility model;
[0017] Figure 3 is a schematic structural diagram of the external positive pressure working condition additional module of the utility model;
[0018] Figure 4 is a cross-sectional view of the adapter of the external positive pressure working condition additional module of the utility model;
[0019] In the above figures: 1. Sampling pipe; 2. Sampling host; 21. Sampling nozzle; 3. External positive pressure working condition additional module; 31. Adapter; 311. Sampling pipe joint; 312. Sampling host joint; 313. Sealing groove; 314. Middle part of the adapter; 315. Extension part; 32. Blower; 33. Connecting pipe; 34. Check valve; 35. Fixed plate; 351. Vertical plate; 352. Horizontal plate. Detailed Embodiments
[0020] To better understand the utility model, specific descriptions will be given below in conjunction with the drawings and embodiments.
[0021] Embodiment: As Figure 1As shown in the figure, a direct-reading smoke and dust device includes a sampling tube 1 and a sampling host 2. An external positive pressure working condition additional module 3 is connected between the sampling tube 1 and the sampling host 2. The external positive pressure working condition additional module 3 includes an adapter 31 and a blower 32. The inlet end of the adapter 31 is provided with a sampling tube joint 311, and the outlet end of the adapter 31 is provided with a sampling host joint 312. The lower part of the adapter 31 is connected to the suction port of the blower 32 through a connecting pipe 33. A check valve is installed in the connecting pipe 33. When the blower 32 operates, the air flow enters the adapter 31 through the sampling tube 1 and then is discharged through the blower 32. The check valve can prevent the air flow from being sucked back.
[0022] To connect the adapter 31 and the blower 32 into an integrated and independent module, a fixing plate is also connected between the adapter 31 and the blower 32. The fixing plate includes a vertical plate and a horizontal plate. The upper end of the vertical plate is connected to the adapter 31, and the blower 32 is installed on the lower surface of the horizontal plate. This independent module can be selectively used when working under positive pressure conditions.
[0023] The middle part 314 of the adapter is provided with a flared shape that gradually narrows from the sampling tube end to the sampling host end. An extension part 315 connecting the flared opening is arranged inside the sampling tube joint. This structure can avoid the interception of particulate matter. A drain port is arranged below the extension part 315. The condensed water formed by the condensation of water vapor in the flue gas can flow downward into the connecting pipe through this drain port and be pumped out by the blower 32.
[0024] A sealing groove 313 is arranged on the inner wall of the sampling tube joint 311, and a sealing ring is installed in the sealing groove 313. The sampling tube 1 can be directly inserted into the sampling tube joint 311 to complete the assembly. Similarly, a sealing groove 313 is arranged on the outer wall of the sampling host joint 312, and a sealing ring is installed in the sealing groove 313. Inserting the adapter 31 into the sampling nozzle joint of the sampling host 2 completes the assembly.
[0025] When the direct-reading smoke and dust device needs to work under positive pressure conditions, install the external positive pressure working condition additional module 3 between the sampling tube 1 and the sampling host 2. When the sampling host 2 sucks in the flue gas and deposits it on the paper tape, the blower 32 does not operate, and the air flow enters the sampling nozzle 21 of the sampling host 2 from the sampling tube 1. After the particulate matter is deposited on the paper tape, it is discharged; when the deposition is completed, the sampling nozzle 21 rises away from the paper tape. At this time, the blower 32 operates to suck out the air flow entering the sampling tube 1, avoiding the entry of flue gas into the sampling host 2 during the detection of the beta-ray unit and the condensation of condensed water on the paper tape. This effectively solves the problem of inaccurate data caused by the generation of condensed water under positive pressure conditions.
[0026] The above are only the preferred embodiments of the present utility model and do not constitute other forms of limitation to the present utility model. Any person skilled in the relevant art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the protection scope of the technical solution of the present invention.
Claims
1. An external positive pressure condition additional module, characterized in that: It includes an adapter and a blower. A sampling pipe joint is provided at the inlet end of the adapter, and a sampling main machine joint is provided at the outlet end of the adapter. The lower part of the adapter is communicated with the air suction port of the blower through a connecting pipe, and a one-way valve is installed in the connecting pipe.
2. The external positive pressure condition additional module according to claim 1, characterized in that: A fixing plate is also connected between the adapter and the blower.
3. The external positive pressure condition additional module according to claim 1, wherein: The middle part of the adapter is arranged in a flared shape.
4. The additional module for external positive pressure working conditions according to claim 3, characterized in that: An extension part connecting the flared opening is arranged in the sampling pipe joint, and a drain port is arranged at the lower part of the extension part.
5. The additional module for external positive pressure working conditions according to claim 1, wherein: A sealing groove is arranged in the sampling pipe joint, and a sealing ring is installed in the sealing groove.
6. The external positive pressure condition additional module according to claim 1, wherein: A sealing groove is arranged on the outer wall of the sampling main machine joint, and a sealing ring is installed in the sealing groove.
7. A direct-reading equipment for soot and dust, characterized in that: It includes a sampling pipe and a sampling main machine, and an external positive pressure working condition additional module according to any one of claims 1-6 is connected between the sampling pipe and the sampling main machine.