Coal-fired flue gas ultra-low emission and waste-heat utilization combined system and running method thereof

A coal-fired flue gas and waste heat technology, applied in combustion methods, heating systems, heat recovery systems, etc., can solve problems such as huge energy consumption, and achieve high energy utilization, high stability, and strong system feasibility

Pending Publication Date: 2019-03-29
TSINGHUA UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, the direct heating method will result in huge energy consumption

Method used

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  • Coal-fired flue gas ultra-low emission and waste-heat utilization combined system and running method thereof
  • Coal-fired flue gas ultra-low emission and waste-heat utilization combined system and running method thereof
  • Coal-fired flue gas ultra-low emission and waste-heat utilization combined system and running method thereof

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Embodiment Construction

[0035] The specific embodiment of the present invention and working process will be further described below in conjunction with accompanying drawing.

[0036] The orientation terms such as up, down, left, right, front and rear in this application document are established based on the positional relationship shown in the drawings. If the drawings are different, the corresponding positional relationship may also change accordingly, so this should not be understood as limiting the scope of protection.

[0037]Such as figure 1 As shown, a coal-fired flue gas ultra-low emission cooperative waste heat utilization system includes a flue air system, a heating network water system and a circulating water system. The flue gas system includes a dust collector 1 , a high-temperature waste heat recovery device, a desulfurization tower 5 , a low-temperature waste heat recovery device and a reheater 9 , and a chimney 10 connected in sequence through a flue gas channel. The high temperature...

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Abstract

The invention provides a coal-fired flue gas ultra-low emission and waste-heat utilization combined system and a running method thereof. The system includes a flue gas and air system, a heat supply network water system and a circulating water system. The flue gas and air system includes a dust remover, a high temperature waste heat recovery device, a desulfurization tower, a low temperature wasteheat recovery device, a reheater and the like which are sequentially connected through a flue gas and air passage. The high temperature waste heat device is connected to the heat supply network watersystem through a pipeline arranged between the high temperature waste heat device and the heat supply network water system. The heat supply network water system and the circulating water system exchange heat through a heat pump, so that the circulating water system and a low temperature and low grade heat source of flue gas of an outlet of the desulfurization tower are deeply utilized. The flue gas of an outlet of a boiler air pre-heater is subjected to dedusting, cooling, desulfuration and cooling again, phase change agglomeration, turbulent agglomeration and other effects are used for deepremoval of fine particles, moisture and soluble salts in the flue gas, and the flue gas ultra-low emission is achieved during flue gas and steam turbine condenser circulating water waste heat using. The coal-fired flue gas ultra-low emission and waste-heat utilization combined system and the running method have the advantages that the low-grade energy cascade utilization efficiency is low, and ultra-low emission of pollutants in the flue gas is achieved.

Description

technical field [0001] The invention relates to a system and an operating method thereof for ultra-low emission of coal-fired flue gas in conjunction with waste heat utilization, and belongs to the technical field of cogeneration of heat and power. Background technique [0002] my country is a large energy consumption country dominated by coal. At present, in order to achieve ultra-low emission of flue gas in existing coal-fired power stations, denitrification equipment, electrostatic precipitator, wet desulfurization equipment, wet electrostatic precipitator, etc. have been successively installed in the tail flue. Particles distributed in the range of 0.1-1 μm have a poor removal effect, and these fine particles are not easily deposited in the atmosphere, which can easily cause smog, damage the atmospheric environment, and damage human health. At this stage, the development direction of fine particle control technology is mainly to remove small particles after agglomeratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J15/02F23J15/06F23J15/08F24D3/18F25B30/06F28D21/00
CPCF23J15/022F23J15/06F23J15/08F24D3/18F25B30/06F28D21/0007F23J2219/70F23J2217/102F23J2217/101F23J2215/20Y02B30/52Y02E20/30
Inventor 卓建坤秦明臣李水清王金星徐静颖
Owner TSINGHUA UNIV
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