Smoke dust direct-reading equipment with positive pressure working condition additional module

Abstract

The utility model provides smoke dust direct reading equipment with a positive pressure working condition additional module, which comprises a sampling pipe, a sampling host and the positive pressure working condition additional module, the positive pressure working condition additional module comprises an electric ball valve, the inlet end of the electric ball valve is connected with a sampling pipe joint, and the outlet end of the electric ball valve is connected with a sampling host joint. When deposition is completed, gas in the sampling pipe can be blocked in the pipeline through the positive pressure working condition additional module, so that the smoke is prevented from entering the sampling host in the detection process of the beta-ray unit and being condensed into condensed water to be deposited on a paper tape, and the sampling efficiency is improved. And the problem of inaccurate data caused by condensate water generated under the positive pressure working condition is well solved. The positive pressure working condition additional module is of a detachable structure and can be assembled according to needs to be matched with various machine types.

Description

Technical Field

[0001] The utility model belongs to the field of smoke and dust sampling and detection equipment, and particularly relates to a direct-reading smoke and dust device with a positive pressure working condition additional module. Background Technique

[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. Parameters such as the type, concentration, and total amount of the emitted flue gas need to be measured by various flue gas analysis systems.

[0003] At present, 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. 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. The water droplets 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 a direct-reading smoke and dust device 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.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] A direct-reading smoke and dust device with a positive pressure working condition additional module includes a sampling tube and a sampling main unit, and further includes a positive pressure working condition additional module. The positive pressure working condition additional module includes an electric ball valve. The inlet end of the electric ball valve is connected with a sampling tube joint, and the outlet end of the electric ball valve is connected with a sampling main unit joint.

[0007] Preferably, a heating sleeve is arranged on the outer wall of the electric ball valve.

[0008] Preferably, the outlet end of the electric ball valve is provided with internal threads, one end of the sampling main unit joint connected with the electric ball valve is provided with external threads and a flange, and the other end of the sampling main unit joint is provided with a sealing ring.

[0009] Preferably, the outlet end of the electric ball valve is provided with screw holes, one end of the sampling main unit joint connected with the electric ball valve is provided with a flange, and arc-shaped holes are arranged on the flange. Screws screwed into the screw holes are installed in the arc-shaped holes.

[0010] Compared with the prior art, the advantages and positive effects of the utility model are as follows:

[0011] When the direct-reading soot equipment with a positive-pressure operating condition additional module of the present utility model finishes deposition, the gas in the sampling pipe can be blocked in the pipeline through the positive-pressure operating condition additional module, preventing the flue gas from entering the sampling main unit during the detection of the beta-ray unit and condensing into condensate, which deposits on the paper tape. This effectively solves the problem of inaccurate data caused by the generation of condensate under positive-pressure operating conditions. The positive-pressure operating condition additional module is a detachable structure and can be assembled as needed to match multiple models. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the direct-reading soot equipment of the present utility model;

[0013] Figure 2 is a schematic structural diagram of the positive-pressure operating condition additional module of the direct-reading soot equipment of the present utility model;

[0014] Figure 3 is an internal cross-sectional view of the positive-pressure operating condition additional module of the present utility model;

[0015] In the above figures: 1. Sampling pipe; 2. Sampling main unit; 3. Positive-pressure operating condition additional module; 31. Electric ball valve; 311. Motor; 312. Inlet end; 313. Outlet end; 314. Sphere; 315. Flange; 316. Arc-shaped hole; 317. Screw; 32. Sampling pipe joint; 33. Sampling main unit joint; 34. Heating sleeve. Detailed Embodiments

[0016] To better understand the present utility model, specific descriptions will be given below in conjunction with the drawings and embodiments.

[0017] Embodiment: As Figures 1 - 3 shown, a direct-reading soot equipment with a positive-pressure operating condition additional module includes a sampling pipe 1 and a sampling main unit 2, and a positive-pressure operating condition additional module 3 is connected between the sampling pipe 1 and the sampling main unit 2. The positive-pressure operating condition additional module 3 includes an electric ball valve 31, and the electric ball valve 31 includes a valve body and a motor 311, and the motor 311 is electrically connected to the control system of the sampling main unit 2. The valve body includes an inlet end 312 and an outlet end 313, and a valve seat and a sphere 314 are arranged inside the valve body. The inlet end 312 of the electric ball valve 31 is connected with a sampling pipe joint 32, and the outlet end 313 of the electric ball valve 31 is connected with a sampling main unit joint 33.

[0018] The connection mode between the inlet end 312 of the electric ball valve 31 and the sampling tube joint 32 can be various, which can be a fixed connection or a detachable connection. In this embodiment, in order to be applicable to sampling tubes of different manufacturers and different types, a detachable connection mode is selected. Specifically, an internal thread is provided at the inlet end 312 of the electric ball valve 31, and an external thread is provided at one end of the sampling tube joint 32 connected thereto. The two are screwed together by threads. Of course, a screw 317 can also be used for connection. Similarly, the connection mode between the outlet end 313 of the electric ball valve 31 and the sampling host joint 33 is also selected as a detachable connection, and a threaded connection can be adopted, that is, an internal thread is provided at the outlet end 313 of the electric ball valve 31, and an external thread and a flange 315 are provided at one end of the sampling host joint 33 connected to the electric ball valve 31. The sampling host joint 33 can be screwed into the inlet end 312 of the electric ball valve 31 through threads. A sealing ring is provided at the other end of the sampling host joint 33, and the assembly can be completed by directly inserting this end into the docking port of the sampling host 2. The connection mode between the outlet end 313 of the electric ball valve 31 and the sampling host joint 33 is also selected as a bolt connection. Specifically, as Figure 2 shown, screw holes are provided at the outlet end 313 of the electric ball valve 31, a flange 315 is provided at one end of the sampling host joint 33 connected to the electric ball valve 31, an arc-shaped hole 316 is provided on the flange 315, and screws screwed into the screw holes are installed in the arc-shaped hole 316. The connection orientation can be appropriately adjusted through the arc-shaped hole 316.

[0019] A heating sleeve 34 is provided on the outer wall of the electric ball valve 31, and the flue gas in the electric ball valve 31 is heated through the heating sleeve 34 to prevent the condensed water in the flue gas from condensing here and affecting the detection result.

[0020] When the dust direct reading device needs to work under positive pressure conditions, the positive pressure condition additional module 3 is installed between the sampling tube 1 and the sampling host 2. When the sampling host 2 inhales flue gas and deposits it on the paper tape, the electric ball valve 31 opens to allow the air flow to pass smoothly; when the deposition is completed, the electric ball valve 31 closes to block the gas in the sampling tube in the pipeline, preventing the flue gas from entering the sampling host 2 during the detection process of the β-ray unit and condensing into condensed water and depositing on the paper tape, which well solves the problem of inaccurate data caused by the generation of condensed water under positive pressure conditions.

[0021] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content 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 invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A direct-reading smoke and dust device with a positive pressure working condition additional module, comprising a sampling pipe and a sampling host, characterized in that: It further includes a positive pressure working condition additional module, and the positive pressure working condition additional module includes an electric ball valve. The inlet end of the electric ball valve is connected with a sampling pipe joint, and the outlet end of the electric ball valve is connected with a sampling host joint.

2. The soot direct-reading device with a positive-pressure operating condition additional module according to claim 1, wherein: A heating sleeve is arranged on the outer wall of the electric ball valve.

3. The direct-reading soot device with a positive-pressure operating condition additional module according to claim 1, characterized in that: Internal threads are arranged at the outlet end of the electric ball valve. One end of the sampling host joint connected with the electric ball valve is provided with external threads and a flange, and the other end of the sampling host joint is provided with a sealing ring.

4. The smoke direct-reading device with a positive pressure operating condition additional module according to claim 1, characterized in that: Screw holes are arranged at the outlet end of the electric ball valve. One end of the sampling host joint connected with the electric ball valve is provided with a flange, and arc-shaped holes are arranged on the flange. Screws screwed into the screw holes are installed in the arc-shaped holes.

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