Sampling device for high-dust-concentration flue gas on-line monitoring system

Abstract

The utility model relates to the field of gas sampling, in particular to a sampling device for a high-dust-concentration flue gas on-line monitoring system, which comprises a sleeve, a sampling tube is embedded in one end of the sleeve, a filter tube is fixedly sleeved at one end of the sampling tube, and a shell is fixed at one end of the sleeve far away from the filter tube. A heater is installed on the inner wall of the shell, a filter element is installed at the end, away from the sleeve, of the shell in an embedded mode, compared with an existing sampling device, the sampling device for the high-dust-concentration flue gas online monitoring system is additionally provided with a filter pipe, flue gas is filtered once through the filter pipe, the sampling pipe is in a relatively clean environment, and therefore the working condition of the original filter element is met. The newly added compressed air back-blowing port is controlled by cems to back blow the primary filter tube at regular time, and the back-blowing effect of the primary filter tube can be effectively improved by matching with the air holes uniformly formed in the sampling tube, so that the air permeability of the primary filter tube is ensured. The improved sampling probe can ensure normal sampling work in a high-concentration smoke dust environment.

Description

Technical Field

[0001] The utility model relates to the field of gas sampling, in particular to a sampling device for an online monitoring system of flue gas with high dust concentration. Background Art

[0002] With the continuous improvement of industrial environmental protection requirements and the application of automated desulfurization and denitrification process technologies, CEMS sampling technology is needed to accurately measure the pollutant concentration of raw flue gas in order to achieve the goal of precise control. However, raw flue gas does have the problems of high temperature and high dust concentration. The CEMS sampling device originally designed for low-dust flue gas after treatment cannot be effectively used in such environments.

[0003] Therefore, it is necessary to provide a sampling device for an online monitoring system of flue gas with high dust concentration to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a sampling device for an online monitoring system of flue gas with high dust concentration.

[0005] The utility model provides a sampling device for an online monitoring system of flue gas with high dust concentration, comprising a sleeve, a sampling tube embedded in one end of the sleeve, a filter tube fixed on one end of the sampling tube, a shell fixed on the end of the sleeve away from the filter tube, a heater installed on the inner wall of the shell, a filter element embedded in the end of the shell away from the sleeve, an air outlet provided on one end of the filter element, and a backflush port connected to the interior of the shell provided on the side wall of the shell.

[0006] Preferably, the side wall of the sampling tube is provided with a plurality of air holes.

[0007] Preferably, the sampling tube and the filter tube are both provided with a first flange, and the two first flanges are connected by bolts.

[0008] Preferably, it is characterized in that both the sleeve and the shell end are provided with a second flange, and the two second flanges are connected by bolts.

[0009] Preferably, sealing gaskets are provided between adjacent first flanges and between adjacent second flanges.

[0010] Compared with the related art, the present invention has the following beneficial effects:

[0011] Compared to existing sampling devices, the addition of a filter tube allows flue gas to undergo a primary filtration process, maintaining a relatively clean environment within the sampling tube, thus meeting the operating requirements of the original filter element. The newly added compressed air backflush port, controlled by the CEMs, provides a timed backflush of the primary filter tube. Combined with the evenly spaced air holes on the sampling tube, this effectively enhances the backflush effect of the primary filter tube, ensuring its air permeability. This improved sampling probe ensures proper sampling even in high-concentration smoke and dust environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the radar bracket of the present utility model.

[0013] Numbers in the figure: 1, casing; 2, sampling tube; 3, filter tube; 4, shell; 5, heater; 6, filter element; 7, air outlet; 8, backflush port; 9, air hole; 10, first flange; 11, second flange. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0015] Please refer to Figure 1 A sampling device for an online monitoring system of high-dust flue gas concentrations. Its core component includes a sleeve 1, one end of which is cleverly embedded and fixed with a sampling tube 2. To ensure that the sampling tube 2 can operate in a relatively clean environment, a filter tube 3 is specially fixed to the outside of the sampling tube 2. This allows the flue gas to be filtered before entering the sampling tube 2, creating a low-dust working environment for it. It is worth mentioning that this filter tube 3 can be customized according to different flue gas environments, and both the type and material can be flexibly adjusted to meet various practical needs.

[0016] The other end of the cannula 1 is securely connected to the housing 4. Inside the housing 4, a heater 5 is installed to ensure the flue gas maintains a suitable temperature during sampling. Furthermore, a cavity is located within the housing 4, tightly connected to the sampling tube 2, ensuring smooth flue gas flow. To further purify the flue gas, a filter element 6 is embedded within the cavity. One end of this filter element 6 is carefully designed with an air outlet 7, ensuring that the secondary filtered flue gas can flow out cleanly.

[0017] To extend the service life of the filter tube 3, a backflush port 8 is specially provided on the side wall of the housing 4. This design is very practical and can be used in conjunction with the CEMS system. By setting a regular backflush program, the dust accumulated on the filter tube 3 is automatically cleaned, thereby greatly extending its service life.

[0018] We have also put a lot of effort into the design of the sampling tube 2. Multiple air holes 9 are distributed on its sidewall. These air holes not only help to uniformly sample the flue gas, but also enhance the cleaning effect during the backflush process.

[0019] To facilitate installation and maintenance, a first flange 10 is provided on both the sampling tube 2 and the filter tube 3, which are tightly connected by bolts. Similarly, a second flange 11 is also fitted to the ends of the sleeve 1 and the housing 4, and the bolts are tightened to ensure the stability and sealing of the entire device.

[0020] It is worth mentioning that we have installed sealing gaskets between the adjacent first flange 10 and second flange 11. This design not only enhances the airtightness of the device, but also effectively prevents smoke leakage, thereby ensuring the accuracy and reliability of the sampling results.

[0021] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sampling device for an online monitoring system of flue gas with high dust concentration, characterized in that: The invention comprises a sleeve (1), wherein a sampling tube (2) is embedded and installed at one end of the sleeve (1), a filter tube (3) is sleeved and fixed at one end of the sampling tube (2), a shell (4) is fixed at the end of the sleeve (1) away from the filter tube (3), a heater (5) is installed on the inner wall of the shell (4), a filter element (6) is embedded and installed at the end of the shell (4) away from the sleeve (1), an air outlet (7) is provided at one end of the filter element (6), and a back-blowing port (8) communicating with the interior of the shell (4) is provided on the side wall of the shell (4).

2. The sampling device for an online monitoring system for high dust concentration flue gas according to claim 1, characterized in that: The side wall of the sampling tube (2) is provided with a plurality of air holes (9).

3. The sampling device for an online monitoring system for high dust concentration flue gas according to claim 1, characterized in that: The sampling tube (2) and the filter tube (3) are both provided with a first flange (10), and the two first flanges (10) are connected by bolts.

4. The sampling device for an online monitoring system for high dust concentration flue gas according to claim 3, characterized in that: The ends of the sleeve (1) and the shell (4) are both provided with a second flange (11), and the two second flanges (11) are connected by bolts.

5. The sampling device for an online monitoring system for high dust concentration flue gas according to claim 4, characterized in that: Sealing gaskets are provided between adjacent first flanges (10) and between adjacent second flanges (11).

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