Unlock instant, AI-driven research and patent intelligence for your innovation.

Coal-fired boiler flue gas sampling device

A technology for flue gas sampling and coal-fired boilers, which is applied in sampling devices and other directions to improve reliability and sampling efficiency, prevent dust from entering, and ensure accuracy.

Active Publication Date: 2017-08-08
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art, and to provide a coal-fired boiler flue gas sampling device; the present invention makes the entrance of the sampling pipe fixed in the flue for a long time well closed, prevents dust from entering, and avoids flue gas sampling The problem of blockage of the pipe improves the reliability of the use of the flue gas sampling pipe and the efficiency of sampling, ensures the accuracy of the test, and improves the accuracy and efficiency of the flue gas sampling work

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coal-fired boiler flue gas sampling device
  • Coal-fired boiler flue gas sampling device
  • Coal-fired boiler flue gas sampling device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a coal-fired boiler flue gas sampling device includes a sampling tube 1 with a circular tube structure. The sampling tube 1 is sealed and connected to the connection hole of the sampling tube base 9. The sampling tube base 9 is connected to the outer wall 10 of the flue. The outer wall 10 of the duct is provided with a radial through hole, and the sampling pipe 1 extends into the flue through the radial through hole, and the two ends of the sampling pipe 1 adopt an inlet elbow 7 and an outlet elbow with the inlet and the outlet downward respectively. 8 structure, the outer pipe of the sampling pipe 1 is connected with the flue gas analyzer. A thin stay cord 3 is provided in the inner cavity of the sampling tube 1, and the stay cord 3 can adopt a thin stainless steel wire rope. The outlet of the outer end of the sampling tube protrudes downwards, the inner end of the pull rope is connected with the inlet sealing plug 2, the inlet sealing plug ...

Embodiment 2

[0032] Such as figure 2 As shown, the bottom of the outlet sealing plug 4 is provided with a spring support seat 12, and the outer end of the stay rope is connected with the upper part of the spring support seat 12 after passing through the outlet sealing plug 4 from top to bottom, and the upper part of the spring support seat is connected with the upper part of the spring support seat. A compression spring 11 is arranged between the lower parts of the outlet sealing plug 4 . Through the action of the resilience of the compression spring when compressed, the inlet sealing plug 2 and the outlet sealing plug 4 can be reliably contacted with the matching sampling tube inlet and sampling tube outlet respectively during operation to form a reliable sealing fit. When not in use, ensure that both ends are well sealed to avoid the entry of dirt and impurities and reduce the impact on test accuracy. Of course, because there is little dust and impurities outside, the outlet position of...

Embodiment 3

[0034] Such as image 3 As shown, the pull cord 3 is provided with a brush 14, and the brush 14 can be tied to the entire pull cord 3 in a convenient untie manner. During the flue gas sampling process, sometimes due to the long working process, it is inevitable that ash will be blocked. When cleaning is required, the outlet sealing plug 4 at the outer end can be untied, and another relatively long stay rope 2 13 can be connected, and then the Fix the brush 14 on the rope, and then only need to manually pull the pull rope 3 with the brush back and forth, and the soot particles and other debris adhering to the inner wall of the sampling tube will be removed by the relative movement of the brush in the axial direction inside the sampling tube 1. Sweep it out, or connect it with a high-pressure blower to blow the cleaned debris from the inside of the pipeline to the outside. When cleaning is not needed, untie the brush from the drawstring and use it when it does not interfere wit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a flue gas sampling device for a coal-fired boiler, which includes a sampling pipe connected to a sampling pipe seat connected to the outer wall of a flue, and the two ends of the sampling pipe adopt an inlet elbow and an outlet with the inlet and outlet facing down respectively. Bend pipe structure, the outer pipe of the sampling pipe is connected with the flue gas analyzer, a pull rope is arranged in the inner cavity of the sampling pipe, the inner end of the pull rope protrudes downward from the entrance of the inner end of the sampling pipe, and the outer end of the pull rope extends from the The outlet of the outer end of the sampling tube protrudes downwards, the inner end of the pull rope is connected with the inlet sealing plug, the inlet sealing plug is matched with the inlet, the outer end of the pull rope is connected with the outlet sealing plug, and the outlet sealing plug is connected with the outlet Cooperate. The invention makes the inlet of the sampling tube fixed in the flue well closed for a long time, prevents dust from entering, avoids the problem of blockage of the flue gas sampling tube, improves the reliability of the use of the flue gas sampling tube and the efficiency of sampling, and ensures the accuracy of the test , Improve the accuracy and efficiency of flue gas sampling work.

Description

technical field [0001] The invention relates to the technical field of boiler flue gas emission detection equipment, in particular to a coal-fired boiler flue gas sampling device. Background technique [0002] For thermal efficiency testing and environmental testing of coal-fired boilers, it is necessary to insert a flue gas sampling tube into the boiler flue, and use a suction pump to suck the flue gas from a specific location to the flue gas analyzer for flue gas component analysis. In order to be able to test at any time and conveniently, the flue gas sampling pipes in the prior art are often fixed inside the flue for a long time. However, in the actual test work, due to the large amount of dust in the flue of the coal-fired boiler, and because of the pulsation and negative pressure fluctuations in the boiler combustion, part of the dust will enter the sampling tube for deposition under the action of the pulsation and negative pressure fluctuations , or even hardened int...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/14
Inventor 赵晴川周新刚姜波刘科张绪辉
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY