CN-121977739-A - Intelligent anti-blocking type flue gas pressure measuring device of desulfurization absorption tower and cleaning method

CN121977739ACN 121977739 ACN121977739 ACN 121977739ACN-121977739-A

Abstract

The invention discloses an intelligent anti-blocking type flue gas pressure measurement device and a cleaning method of a desulfurization absorption tower, comprising a sampling tube and a water storage bin arranged on the outer wall of the sampling tube, wherein two ends of the water storage bin are respectively a first end part and a second end part positioned right below the first end part, the first end part is connected with the outer wall of the sampling tube, a water storage cavity is formed around the periphery of the outer wall of the sampling tube on the inner wall of the water storage bin, a water outlet gap is formed between the inner wall of the second end part and the outer wall of the sampling tube, the water outlet quantity of the water outlet gap is smaller than the water inlet quantity of a flushing water pipe entering the water storage bin, water flow can be sprayed to the outside of the water storage bin along the water outlet gap and the surface of a sampling port arranged below the sampling tube through the water pressure accumulated in the water storage cavity, flushing water flow has no blind point and sufficient impact force, inner wall sundries can be thoroughly flushed away, the continuity and accuracy of pressure data acquisition are guaranteed, and simultaneously the demister can be flushed by the flushing water pipe.

Inventors

XU SHAOXIANG
WANG JIE
ZHENG YONGJIANG
TIAN HAODONG
Xia Fuhua
LONG WEIRONG
Chao Xiaobo
YU CONGJUN
WANG QINGRONG
DING YUAN
HAO XIANGQING
CHEN LONG

Assignees

贵州大方发电有限公司

Dates

Publication Date: 20260505
Application Date: 20251212

Claims (10)

1. The intelligent anti-blocking type flue gas pressure measuring device for the desulfurization absorption tower is characterized by comprising a sampling tube (1) and a water storage bin (2) arranged on the outer wall of the sampling tube (1), wherein the water storage bin (2) is used for being connected with a flushing water tube (3); The two ends of the water storage bin (2) are respectively provided with a first end part (21) and a second end part (22) which is positioned right below the first end part (21), and the first end part (21) is connected with the outer wall of the sampling tube (1); the periphery of the inner wall of the water storage bin (2) surrounds the periphery of the outer wall of the sampling tube (1) to form a water storage cavity (24); a water outlet gap (25) is arranged between the inner wall of the second end part (22) and the outer wall of the sampling tube (1); The water outlet of the water outlet gap (25) is smaller than the water inlet of the flushing water pipe (3) entering the water storage bin (2), and water flow can be sprayed to the outside of the water storage bin (2) along the water outlet gap (25) and the surface of the sampling port (11) arranged below the sampling pipe (1) by water pressure accumulated in the water storage cavity (24).
2. The intelligent anti-blocking desulfurization absorption tower flue gas pressure measuring device according to claim 1, wherein the second end portion (22) is located above the sampling port (11), and the cross-sectional diameter of the sampling port (11) close to the second end portion (22) is smaller than the cross-sectional diameter of the sampling port away from the second end portion (22).
3. The intelligent anti-blocking type flue gas pressure measuring device for the desulfurization absorption tower, which is disclosed in claim 2, is characterized in that a first flange plate (4) is arranged on the outer wall of the water storage bin (2), and the first flange plate (4) can be connected with a second flange plate (6) at the end part of the tubular pile (5) through a fixing piece; The pipe pile (5) is used for measuring flue gas pressure in the desulfurization absorption tower (12), the end part of the pipe pile (5) provided with the second flange plate (6) stretches out of the desulfurization absorption tower (12), and the end part of the pipe pile (5) away from the second flange plate (6) stretches into the inner wall of the desulfurization absorption tower (12).
4. The intelligent anti-blocking desulfurizing absorption tower flue gas pressure measurement device according to claim 3, wherein when the first flange plate (4) is connected with the second flange plate (6), the second end part (22) and the sampling port (11) are positioned on the inner wall of the tubular pile (5); the water flow is uniformly sprayed to the inner wall of the pipe pile (5) along the surface of the sampling port (11) through a water outlet gap (25) under the action of water pressure in the water storage cavity (24), and impurities on the inner wall of the pipe pile (5) are flushed away from the inner wall of the pipe pile (5) through impact force and flowing force of the water flow sprayed to the inner wall of the pipe pile (5).
5. The intelligent anti-blocking desulfurization absorption tower flue gas pressure measuring device according to claim 4, wherein the water storage bin (2) further comprises an intermediate portion (23) arranged between the first end portion (21) and the second end portion (22), and the cross-sectional diameter of the intermediate portion (23) is larger than that of the second end portion (22).
6. The intelligent anti-blocking desulfurization absorption tower flue gas pressure measuring device according to claim 5, wherein a connection (7) between the flushing water pipe (3) and the water storage bin (2) is located between the first end portion (21) and the middle portion (23), and the connection (7) is close to the first end portion (21).
7. A cleaning method of an intelligent anti-blocking type desulfurization absorption tower flue gas pressure measuring device is characterized by being applied to the intelligent anti-blocking type desulfurization absorption tower flue gas pressure measuring device as set forth in any one of claims 3-6, Inserting a sampling port (11) of the sampling tube (1) into the end part of the tubular pile (5) provided with the second flange plate (6) into the inner wall of the tubular pile (5); the first flange plate (4) and the second flange plate (6) are connected through a fixing piece; The flushing water pipe (3) connected with the water tank is connected with the water storage bin (2), and the flushing water pipe (3) is connected with a flushing pump; The interval start-stop time of the flushing pump is set, so that water flows into the water storage bin (2) through the flushing water pipe (3) at regular time and is sprayed to the inner wall of the pipe pile (5) through the water storage bin (2), and the inner wall of the pipe pile (5) is automatically flushed at regular time.
8. The method for cleaning the intelligent anti-blocking type desulfurization absorption tower flue gas pressure measurement device according to claim 7, wherein the flushing water pipe (3) is connected with a demister (10) at the same time, and the demister (10) is used for removing liquid drops and slurry particles carried in wet flue gas after the desulfurization absorption tower (12) is purified.
9. The method for cleaning the intelligent anti-blocking desulfurizing absorption tower flue gas pressure measurement device according to claim 8, wherein the flushing pump (9) controls intermittent start-stop time through DCS.
10. The method for cleaning the intelligent anti-blocking type desulfurization absorption tower flue gas pressure measuring device according to claim 9, wherein the flushing pump (9) can flush the demister (10) and the inner wall of the pipe pile (5) at the same time when being started.

Description

Intelligent anti-blocking type flue gas pressure measuring device of desulfurization absorption tower and cleaning method Technical Field The invention relates to the field of pressure measurement, in particular to an intelligent anti-blocking type flue gas pressure measurement device of a desulfurization absorption tower and a cleaning method. Background The original flue gas pressure measuring device of the desulfurization absorption tower adopts the structural design of a traditional sampling tube, and the structure can meet basic measurement requirements at the initial stage, and because the flue gas treated by the desulfurization absorption tower contains a large amount of solid particles such as gypsum, dust and corrosive substances such as chloride ions, the substances are extremely easy to gradually deposit and form a hard scale layer on the inner wall of the sampling tube in the long-term continuous operation process. Over time, the deposits accumulate continuously, eventually leading to a reduced or even complete blockage of the measurement pipeline flow area, severely affecting accurate acquisition and real-time transmission of pressure data. Due to the limitation of the structure, the traditional measuring device has higher inherent defect rate, and operation maintenance personnel are required to frequently perform manual cleaning and dredging in the use process, so that the maintenance workload and the labor cost are obviously increased, and the measurement data is possibly interrupted due to operation errors or shutdown maintenance in the cleaning process. Disclosure of Invention Therefore, the invention aims to solve the technical problem that operation maintenance personnel are required to frequently perform manual cleaning and dredging in the use process of the traditional measuring device. The technical problem is solved by the technical scheme that the intelligent anti-blocking type flue gas pressure measuring device for the desulfurization absorption tower comprises a sampling pipe and a water storage bin arranged on the outer wall of the sampling pipe, wherein the water storage bin is used for being connected with a flushing water pipe, two ends of the water storage bin are respectively a first end part and a second end part which is positioned right below the first end part, the first end part is connected with the outer wall of the sampling pipe, the periphery of the inner wall of the water storage bin surrounds the periphery of the outer wall of the sampling pipe to form a water storage cavity, a water outlet gap is formed between the inner wall of the second end part and the outer wall of the sampling pipe, the water outlet quantity of the water outlet gap is smaller than the water inlet quantity of the flushing water pipe entering the water storage bin, and water flow can be sprayed to the outside of the water storage bin along the water outlet gap and the surface of a sampling port arranged below the sampling pipe through water pressure accumulated in the water storage cavity. In one preferable mode of the intelligent anti-blocking type flue gas pressure measuring device for the desulfurization absorption tower, the second end is located above the sampling port, and the diameter of the cross section of the sampling port, which is close to the second end, is smaller than that of the cross section of the sampling port, which is far away from the second end. In a preferable mode of the intelligent anti-blocking type flue gas pressure measuring device for the desulfurization absorption tower, a first flange is arranged on the outer wall of the water storage bin and can be connected with a second flange at the end part of the pipe pile through a fixing piece, the pipe pile is used for measuring the flue gas pressure in the desulfurization absorption tower, the end part of the pipe pile, which is provided with the second flange, extends out of the desulfurization absorption tower, and the end part, which is far away from the second flange, of the pipe pile extends into the inner wall of the desulfurization absorption tower. In a preferred mode of the intelligent anti-blocking type desulfurization absorption tower flue gas pressure measuring device, when the first flange plate is connected with the second flange plate, the second end portion and the sampling port are positioned on the inner wall of the pipe pile, water flow is evenly sprayed to the inner wall of the pipe pile along the surface of the sampling port through a water outlet gap under the action of water pressure in the water storage cavity, and impurities on the inner wall of the pipe pile are flushed away from the inner wall of the pipe pile through impact force and flowing force of the water flow sprayed to the inner wall of the pipe pile. In one preferable mode of the intelligent anti-blocking type desulfurization absorption tower flue gas pressure measuring device, the water storage bin further comprises a middle portion