CN-121978277-A - Back-blowing stable inspection device suitable for high-temperature high-dust flue

CN121978277ACN 121978277 ACN121978277 ACN 121978277ACN-121978277-A

Abstract

The invention discloses a back-blowing stable inspection device suitable for a high-temperature high-dust flue, which comprises a detection shell, a sensor shell and a back-blowing assembly, wherein the detection shell is provided with a sleeve, one end of the sleeve is provided with an annular bottom plate, the other end of the sleeve is provided with a filter screen, a flue gas chamber is formed in the sleeve, the sensor shell is of a pipe body structure, one end of the sensor shell is connected with the bottom plate and communicated with the flue gas chamber, a plurality of sensor elements are arranged in the sensor shell, a flue gas exhaust pipe externally connected with a suction pump is communicated with the shell, the back-blowing assembly comprises a back-blowing branch pipe and an external air source, the back-blowing branch pipe is communicated with the other end of the sensor shell, and a one-way valve is arranged at the joint. According to the invention, large-particle dust is primarily blocked by the filter screen, and clean air flow is reversely introduced into the sensor shell and the smoke chamber at regular intervals or timely by utilizing the back-blowing component, so that deposited dust attached to the surface of the sensor element and the filter screen is effectively removed, the influence of the dust on the detection precision is obviously reduced, and the long-term stable operation and the measurement accuracy of the sensor under severe working conditions are ensured.

Inventors

WU YUEJIAN
Zheng Guangchen
ZHOU JING
JIN LIMEI
YANG ZUWANG
ZHANG JIAN
LI YANSEN
WANG CHENGLIANG
LIU KAI
LIU XIAOMING
XU KUN
LI MENG
ZHANG SHUN
WANG YALIN
GUO HAIYING

Assignees

华电淄博热电有限公司
华电国际电力股份有限公司技术服务分公司
西安格瑞电力科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260204

Claims (8)

1. Reverse-blowing stable inspection device suitable for high temperature high dust flue, its characterized in that includes: The detection shell comprises a sleeve (2), wherein a bottom plate (4) is arranged at one end of the sleeve (2), the bottom plate (4) is of an annular structure, and a filter screen (3) is arranged at the other end of the sleeve (2), and the inner space of the sleeve (2) is called a smoke chamber (1); The sensor shell (5) is of a tube structure, one end of the sensor shell is connected to one side, far away from the smoke chamber (1), of the bottom plate (4) and is communicated with the inside of the smoke chamber (1), a plurality of sensor elements are arranged in the sensor shell (5), a plurality of smoke exhaust pipes (6) are communicated with the sensor shell (5), and the smoke exhaust pipes (6) are externally connected with a suction pump; the back-blowing assembly comprises a back-blowing branch pipe (13), one end of the back-blowing branch pipe is communicated with the other end of the sensor shell (5) through a connecting assembly, a one-way valve is arranged at the connecting position, and an external air source is connected with the other end of the back-blowing branch pipe (13).
2. The back-blowing stable inspection device suitable for the high-temperature high-dust flue according to claim 1, further comprising a blockage cleaning assembly, wherein the blockage cleaning assembly comprises a mounting frame (14), a rotating rod (15) and a first scraping strip (19); the mounting frame (14) comprises two turntables and a plurality of mounting rods arranged on the periphery of the turntables, wherein the turntables and the bottom plate (4) are positioned on the same central shaft, and connecting rods are connected between the mounting rods positioned at the opposite positions on the two turntables; The two ends of the rotating rod (15) are respectively connected to the end face centers of the two turntables, the rotating rod (15) is positioned on the axial central shaft of the sleeve (2), the rotating rod (15) is fixedly provided with fan blades (17) positioned in the flue gas flow path, and the fan blades (17) are configured to be driven by gas flow to drive the rotating rod (15) to rotate; The first scraping strip (19) is fixed on the outer side of the connecting rod, and the scraping surface of the first scraping strip (19) is in contact with the inner side wall of the flue gas chamber (1).
3. The back-blowing stable inspection device suitable for the high-temperature high-dust flue according to claim 2, wherein an annular channel is formed in the end face of the bottom plate (4), and a sliding block is arranged on the side face of the mounting rod and slides in the annular channel.
4. The back-blowing stable inspection device suitable for the high-temperature high-dust flue according to claim 2, wherein a second scraping strip is arranged on a mounting rod on a turntable close to the filter screen (3), and a scraping surface of the second scraping strip is in contact with the filter screen (3).
5. A back-blowing stable inspection device suitable for high temperature and high dust flues according to claim 1, characterized in that at least three sensor elements are provided and a plurality of sensor elements are distributed at intervals along the axial direction of the flue gas chamber (1).
6. The back-blowing stable inspection device suitable for the high-temperature high-dust flue according to claim 2, wherein the scraping surface of the scraping strip (19) is a hard wear-resistant layer formed by wear-resistant ceramics.
7. The back-blowing stable inspection device suitable for a high-temperature high-dust flue according to claim 1, wherein the suction pump is provided with a control module capable of enabling the middle end to work.
8. The back-blowing stable inspection device suitable for high-temperature high-dust flues according to claim 1, wherein said connection assembly comprises: The connecting pipe orifice (12) is connected with one end of the back-blowing branch pipe (13); The mounting disc (8) is of an annular structure and is fixedly sleeved at the other end of the sensor shell (5), and threads are formed on the outer periphery side of the mounting disc (8); The first fixing ring (11) and the second fixing ring (9) are provided with internal threads on the inner ring surface and are in threaded connection with the mounting plate (8), and the first fixing ring (11) is fixedly connected with the other end of the connecting pipe orifice (12); the sealing ring (10) is sleeved on the mounting plate (8), the inner ring surface of the sealing ring (10) is tightly attached to the outer side surface of the mounting plate (8), and the sealing ring (10) is tightly arranged between the first fixing ring (11) and the second fixing ring (9).

Description

Back-blowing stable inspection device suitable for high-temperature high-dust flue Technical Field The invention relates to the technical field of inspection devices, in particular to a back-blowing stable inspection device suitable for a high-temperature high-dust flue. Background In industrial production processes, in particular in the metallurgical, electrical, building, chemical and other industries, high-temperature, high-dust-concentration flue gases are usually generated, which are required to be discharged through a flue. In order to realize effective monitoring and environment-friendly standard management of the flue gas emission, real-time and accurate inspection of key parameters such as temperature, pressure, gas components and the like in a flue is required. However, when the existing flue gas inspection device is applied to the working conditions of high temperature and high dust concentration, a large amount of high-temperature dust particles carried in the flue gas are very easy to adhere and accumulate at the detection end of the sensor, so that the detection sensitivity and the response speed of the sensor can be directly affected, and the sensor can be blocked and invalid after long-term operation. Disclosure of Invention The invention aims to provide a back-blowing stable inspection device suitable for a high-temperature high-dust flue so as to solve the problems. The technical scheme of the invention is as follows: reverse-blowing stable inspection device suitable for high temperature high dust flue includes: The detection shell comprises a sleeve, a porous high-temperature resistant alloy filter screen, a smoke chamber and a detection device, wherein a bottom plate is arranged at one end of the sleeve, the bottom plate is of an annular structure, and the other end of the sleeve is provided with the filter screen; The sensor shell is of a tube structure, one end of the sensor shell is connected to one side, far away from the smoke chamber, of the bottom plate and is communicated with the inside of the smoke chamber, a plurality of sensor elements are arranged in the sensor shell, a plurality of smoke exhaust tubes are communicated with the sensor shell, and the smoke exhaust tubes are externally connected with a suction pump; the sensor element in the sensor shell adopts a high-temperature adaptive multi-parameter detection element and is used for capturing the information of the temperature, pressure, components and the like of the smoke in the smoke chamber. The back-blowing assembly comprises a back-blowing branch pipe, an external air source and a sensor, wherein one end of the back-blowing branch pipe is communicated with the other end of the sensor shell through a connecting assembly, a one-way valve is arranged at the connecting position, and the external air source is connected with the other end of the back-blowing branch pipe. The back-blowing component is used for removing dust attached to the periphery of the sensor element and the filter screen, and blocking or sensitivity attenuation of the detection end of the sensor element is avoided. Further, the device also comprises a blockage removing assembly, wherein the blockage removing assembly comprises a mounting frame, a rotating rod and a first scraping strip; The mounting frame comprises two turntables and a plurality of mounting rods arranged on the periphery of the turntables, wherein the turntables and the bottom plate are positioned on the same central shaft, and connecting rods are connected between the mounting rods positioned at opposite positions on the two turntables; The two ends of the rotating rod are respectively connected to the end face centers of the two turntables, the rotating rod is positioned on the axial central shaft of the sleeve, the rotating rod is fixedly provided with fan blades positioned in the flue gas flow path, and the fan blades are configured to be driven by gas flow to drive the rotating rod to rotate; the first scraping strip is fixed on the outer side of the connecting rod, and the scraping surface of the first scraping strip is in contact with the inner side wall of the smoke chamber. Further, an annular channel is formed in the end face of the bottom plate, a sliding block is arranged on the side face of the mounting rod and slides in the annular channel, so that the mounting frame can stably rotate in the sleeve. Further, a second scraping strip is arranged on the mounting rod on the turntable close to the filter screen, and the scraping surface of the second scraping strip is in contact with the filter screen. Further, at least three sensor elements are provided, and a plurality of sensor elements are distributed at intervals along the axial direction of the flue gas chamber. Further, the scraping surface of the scraping strip is a hard wear-resistant layer formed by wear-resistant ceramics. Further, the suction pump is provided with a control module enabling the end operation there