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Supercritical tower-type boiler medium and low temperature area dusting and energy-saving device

A tower boiler and energy-saving device technology, which is applied in the removal of solid residue, combustion product treatment, combustion methods, etc., can solve the problems of fouling and clogging of the air preheater of the boiler economizer, and achieve simple structure and reduce coal consumption. The effect of reducing the amount of ammonia injection

Pending Publication Date: 2017-09-12
国网能源哈密煤电有限公司 +1
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Problems solved by technology

[0007] The object of the present invention is to provide a kind of ash removal energy-saving device in the middle and low temperature area of ​​supercritical tower boiler in order to overcome the shortcoming and deficiency of above-mentioned prior art, solve boiler economizer, denitrification selective catalytic reduction (SCR) reactor and air Technical Problems of Dust Accumulation and Blockage of Preheater

Method used

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  • Supercritical tower-type boiler medium and low temperature area dusting and energy-saving device

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Embodiment 1

[0038] Such as figure 1 As shown, it is a schematic diagram of the ash removal and energy-saving device in the low-temperature area of ​​the supercritical tower boiler provided in this embodiment, which includes an economizer 8, a denitrification selective catalytic reduction (SCR) reactor 9 and an air preheater connected in sequence 10. The first adjustable frequency high-intensity sound source 1 is set on the economizer 8, the second adjustable frequency high-intensity sound source 2 is set on the denitrification selective catalytic reduction (SCR) reactor 9, and the air preheater 10 is set There is a third frequency-adjustable high-intensity sound source 3, and the above-mentioned frequency-adjustable high-intensity sound sources are controlled by a unified control unit 6 to emit sound. The above adjustable frequency high-intensity sound sources are powered by a unified sound source power system 7, and the sound source power is gas with a certain pressure. The first freque...

Embodiment 2

[0042] The following is an example of installing a frequency-adjustable high-intensity sound source in a 600MW tower furnace in a power plant. The specific implementation method is as follows:

[0043] In the low-temperature area of ​​the tower furnace: the economizer, denitrification selective catalytic reduction (SCR) reactor and air preheater are installed with frequency-adjustable high-intensity sound sources.

[0044] Among them, a total of 20 movable adjustable frequency high-intensity sound sources and corresponding platform escalators are installed symmetrically on both sides of the economizer area. During normal operation, the movable adjustable frequency high-intensity sound sources provide sound waves with a frequency of 20-600Hz, and pass The transmission mechanism enters and exits the economizer and performs efficient soot blowing to ensure the heat exchange efficiency of the economizer and reduce the coal consumption of the unit, thereby reducing the dust content ...

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Abstract

The invention discloses a supercritical tower-type boiler medium and low temperature area dusting and energy-saving device which comprises a coal economizer, a denitration selective catalytic reduction (SCR) reactor and an air preheater in sequential connection, wherein a frequency-variable high-strength sound source is arranged on each of the coal economizer, the denitration selective catalytic reduction (SCR) reactor and the air preheater and is controlled to produce sound through a unified control unit. The supercritical tower-type boiler medium and low temperature area dusting and energy-saving device can ensure cleaning of a heated surface, ensures that the coal economizer, the air preheater and a heat exchanger reach the designed heat exchanging efficiency, ensures that the denitration catalyst activity of the denitration selective catalytic reduction (SCR) reactor, reduces added fuel consumption caused by reduction of heat exchanging efficiency of a boiler due to surface pollution of the heat exchanger, reduces the added ammonia spraying amount caused by activity reduction of the denitration catalyst, saves energy, and ensures emission of NOX to reach the standard.

Description

technical field [0001] The invention relates to sound wave ash removal and energy saving equipment, in particular to an ash removal and energy saving device for a supercritical tower boiler in a low-temperature region. Background technique [0002] With the increasingly stringent energy conservation and emission reduction standards, the energy conservation and emission reduction work of large thermal power units has been paid more and more attention. The boiler is the core equipment of the thermal power station and one of the key links in the energy conversion of the thermal power station. The thermal efficiency of the boiler directly affects the fuel utilization rate of the thermal power station. During the production and operation of coal-fired boilers, due to the large amount of dust carried in the flue gas, it will accumulate on the surface of the low-temperature heating surface to form ash, thereby reducing the heat exchange efficiency of the heating surface; if the den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J3/00F23J3/02
CPCF23J3/00F23J3/02
Inventor 郑少亮李绍辉张新亮周晓文何超孙卫国朱君举
Owner 国网能源哈密煤电有限公司
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