Sampling method and system for blockages in desulfurization system heat exchanger

A desulfurization system and blockage technology, applied in sampling devices and other directions, can solve the problems of not being able to fully grasp the blockage, the distribution of the blockage components, and the inability to effectively relieve the blockage of the heat exchanger, so as to improve the efficiency and alleviate the blocking effect

Active Publication Date: 2014-01-08
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above sampling method only samples at the top of the heat exchange fins, ignoring other places, such as blockages in the middle and lower parts of the heat exchange fins are also important factors affecting the performance of the heat exchanger, so that the distribution of the blockage components cannot be fully grasped. Fully grasp the distribution of blockages in the heat exchanger, so that it is impossible to take more targeted blockage control measures and effectively alleviate the blockage of the heat exchanger

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  • Sampling method and system for blockages in desulfurization system heat exchanger
  • Sampling method and system for blockages in desulfurization system heat exchanger
  • Sampling method and system for blockages in desulfurization system heat exchanger

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Embodiment 1

[0042] Embodiment 1 of the present invention discloses a method for sampling blockages in heat exchangers of desulfurization systems, such as figure 2 As shown, the method includes:

[0043] S1: Arrange N sampling points in the heat exchanger, where N is a natural number not less than 2.

[0044] The arranging N sampling points in the heat exchanger includes: evenly arranging 9 sampling points on the heat exchange fins of the heat exchanger. Specifically, 3 sampling points are evenly arranged at the edge of the heat exchange fins, 3 sampling points are evenly arranged at the middle of the heat exchange fins, and 3 sampling points are evenly arranged at the center of the heat exchange fins.

[0045] See image 3 , 200 is the heat exchange fin of the cylindrical heat exchanger 100, and the axis ab is the central axis of the heat exchanger 100. Since the heat exchanger is a uniform and slow rotating device, its blockage is in the same cross-section of the cylindrical heat exch...

Embodiment 2

[0052] Embodiment 2 of the present invention, on the basis of Embodiment 1, discloses another process flow of the sampling method for heat exchanger blockages in the desulfurization system. On the basis of sampling, it also includes the follow-up steps of analyzing and processing the blockage samples obtained by sampling, such as Figure 4 As shown, in addition to steps S1 and S2, the sampling method of the blockage in the heat exchanger of the desulfurization system in this embodiment also includes:

[0053] S3: Analyze the blockage samples at each sampling point to obtain the composition and quantity distribution of the blockage, and take corresponding blockage control measures according to the composition and quantity distribution of the blockage.

[0054] Wherein, step S3 specifically includes:

[0055] When the composition and quantity of blockages at each sampling point are basically similar to the composition of ash in the flue gas, the efficiency of electrostatic prec...

Embodiment 3

[0059] Embodiment 3 of the present invention discloses a sampling system for blockages in heat exchangers of desulfurization systems, which corresponds to the sampling method for blockages in heat exchangers of desulfurization systems disclosed in Embodiment 1 or Embodiment 2. Please refer to Figure 5 , the sampling system for heat exchanger blockage in the desulfurization system includes a sampling point arrangement module 510 and a sampling module 520, wherein the sampling point arrangement module 510 is used to arrange N sampling points in the heat exchanger, and N is not less than 2 A natural number; the sampling module 520 is configured to respectively sample the blockage at the N sampling points, so as to obtain blockage samples at each sampling point.

[0060] Corresponding to the sampling method for the blockage in the heat exchanger of the desulfurization system disclosed in Example 2, this embodiment also provides another structure of the sampling system for the bloc...

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Abstract

The invention discloses a sampling method and a sampling system for blockages in a desulfurization system heat exchanger. The method comprises the steps of arranging N sampling points in the heat exchanger, wherein N is a natural number which is more than or equal to 2; respectively sampling the blockages at the N sampling points. Compared with the prior art, the sampling method has the advantage that the sampling is only implemented in places with most blockages on the top of a heat exchange sheet. According to the sampling method, a plurality of sampling points are arranged in the heat exchanger, and the blockages are sampled at the plurality of sampling points; during the specific implementation, the sampling points can be uniformly arranged on the heat exchange sheet or the sampling points can be arranged at severely blocked positions on the heat exchange sheet according to the blockage condition of the heat exchanger in order to comprehensively master components and the quantity of the blockages on different parts of the heat exchanger. Apparently, by adopting the sampling method disclosed by the invention and analyzing the blockage samples on the basis of the sampling method, the distribution of the components of the blockages and the distribution of the blockages in the heat exchanger can be comprehensively mastered; therefore, targeted blockage treatment measures can be taken, and the blockage to the heat exchanger can be effectively alleviated.

Description

technical field [0001] The invention belongs to the technical field of sampling and analysis of blockages in a desulfurization system of a coal-fired unit, and in particular relates to a sampling method and system for blockages in a heat exchanger of a desulfurization system. Background technique [0002] The heat exchanger is one of the main devices in the flue gas desulfurization system. It is usually installed on the flue behind the desulfurization absorption tower. Its function is to use the original flue gas to heat the desulfurized net flue gas and lift the flue gas pollutants. Increase the discharge height and increase the diffusion of pollutants to achieve the purpose of reducing subsequent flue corrosion and prolonging the life of the chimney. But heat exchanger clogging has always been a common and difficult problem in this field. [0003] In order to grasp the blockage of the heat exchanger and effectively control the blockage, it is necessary to understand the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/04
Inventor 崔亚兵任驰王伟金东春陈彪邵炜乐园园曹志勇李治国周晓耘毛文利王万林陆建伟
Owner STATE GRID CORP OF CHINA
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