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Flue gas heat exchanger and online cleaning method thereof

A flue gas heat exchanger and heat exchange element technology, applied in the direction of indirect heat exchangers, heat exchanger types, regenerative heat exchangers, etc., can solve problems such as GGH fouling and blockage that cannot be effectively solved, and achieve easy to overcome Fouling and clogging, reducing the frequency of off-line cleaning, and extending the continuous operation period

Active Publication Date: 2015-01-28
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the existing flue gas heat exchanger and its online cleaning method cannot effectively solve the problem of GGH fouling and clogging, and provide a flue gas heat exchanger and its online cleaning that can effectively solve the problem of fouling and clogging method

Method used

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  • Flue gas heat exchanger and online cleaning method thereof
  • Flue gas heat exchanger and online cleaning method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment is used to illustrate the flue gas heat exchanger and the online cleaning method of the flue gas heat exchanger according to the present invention.

[0045] The flue gas heat exchanger in this embodiment is as figure 1 As shown, the flue gas heat exchanger may include a rotor 1, a sealing area 3, an original flue 4 and a clean flue 5, and the original flue 4 and the clean flue 5 are separated by the sealing area 3 , the rotor 1 is provided with a heat exchange element, the original flue 4 and the clean flue 5 realize heat exchange through the heat exchange element on the rotor 1, the hot end of the original flue 4 and the cold end Each end is provided with a soot blower 11, 12, and the cold ends of the original flue 4 and the clean flue 5 are respectively provided with a cleaning device.

[0046] The flue gas heat exchanger is matched with the desulfurization system and runs continuously.

[0047] The online cleaning method of the present invention is ...

Embodiment 2

[0050] According to the flue gas heat exchanger in Embodiment 1, the difference is that the cold ends of the original flue 4 and the clean flue 5 are respectively provided with a cleaning device.

[0051] The flue gas heat exchanger is matched with the desulfurization system and runs continuously.

[0052] The online cleaning method of the present invention is used for online cleaning of the flue gas heat exchanger: use the soot blower 11 arranged at the hot end of the original flue 4 to blow the heat exchange element arranged on the rotor 1 with high-temperature steam , the conditions of the high-temperature steam purging may include: the pressure of the high-temperature steam is 2.0 MPa, the temperature of the high-temperature steam is 150° C., the flow rate of the high-temperature steam is 20 kg / min, and the high-temperature steam is purged once every 8 hours, The time of each blowing is 2h, 2 times a day; the heat exchange element arranged on the rotor 1 is blown with comp...

Embodiment 3

[0055] The flue gas heat exchanger of this embodiment is such as figure 2 As shown, the flue gas heat exchanger may include a rotor 1, a sealing area 3, an original flue 4 and a clean flue 5, and the original flue 4 and the clean flue 5 are separated by the sealing area 3 , the rotor 1 is provided with a heat exchange element, the original flue 4 and the clean flue 5 realize heat exchange through the heat exchange element on the rotor 1, the hot end of the original flue 4 and the cold end Each end is provided with a soot blower 11,12, and the hot end and the cold end of the clean flue are respectively provided with a soot blower 13,14, and the cold ends of the original flue 4 and the clean flue 5 are also respectively A cleaning device is provided.

[0056] The flue gas heat exchanger is matched with the desulfurization system and runs continuously.

[0057] Adopt the online cleaning method of the present invention to carry out the online cleaning of the flue gas heat excha...

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Abstract

The invention discloses a flue gas heat exchanger and an online cleaning method thereof. The flue gas heat exchanger comprises a rotor (1), a sealing region (3), an original flue pipe (4) and a pure flue pipe (5), wherein the original flue pipe (4) and the pure flue pipe (5) are separated through the sealing region (3); a heat exchanger element is arranged on the rotor (1); the original flue pipe (4) and the pure flue pipe (5) realize heat exchange through the heat exchanger element on the rotor (1); at least one ash blower (11, 12) is respectively arranged at the hot end and the cold end of the original flue pipe (4). Through the application of the flue gas heat exchanger and the online cleaning method thereof provided by the invention, the safety of desulfurization system equipment can be obviously improved, the economical efficiency of desulfurization system operation is improved, and the flue gas heat exchanger has wide application and promotion values.

Description

technical field [0001] The invention relates to the field of flue gas desulfurization systems, in particular to a new flue gas heat exchanger and an online cleaning method thereof. Background technique [0002] The flue gas heat exchanger (GGH) is one of the main devices in the flue gas desulfurization system. Its function is to use the original flue gas to heat the desulfurized clean flue gas, so that the exhaust gas temperature reaches above the dew point, reduces the concentration of pollutants, eliminates the phenomenon of "gypsum rain" and "smoke plume", and reduces the impact on the clean flue and Corrosion of the chimney; at the same time, the temperature of the flue gas entering the absorption tower is reduced, and the technical requirements for anti-corrosion in the tower are reduced. [0003] At present, the widely used GGH purging devices and usage methods in production cannot achieve ideal purging and cleaning functions. With the increase of use time, GGH heat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D19/04F28G9/00F23J3/02
Inventor 刘海滨庄文军高小春赵军江国兵刘纯军
Owner CHINA SHENHUA ENERGY CO LTD
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