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System for desulfurization, white smoke elimination and deep waste heat recovery based on ammonia process, and application

A recovery system and ammonia desulfurization technology, applied in the field of ammonia desulfurization flue gas whitening waste heat deep recovery system, can solve problems such as equipment corrosion, and achieve the effects of easy control, high heat recovery rate and low moisture content

Pending Publication Date: 2018-12-21
AEROSPACE ENVIRONMENTAL ENG
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  • Claims
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Problems solved by technology

The system performs indirect condensation on the flue gas outside the tower, the condensation effect is not as good as the direct spray condensation effect, and the precipitated condensed water is easy to cause corrosion to the equipment

Method used

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  • System for desulfurization, white smoke elimination and deep waste heat recovery based on ammonia process, and application
  • System for desulfurization, white smoke elimination and deep waste heat recovery based on ammonia process, and application

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Embodiment Construction

[0032] The embodiments of the present invention will be described in detail below. It should be noted that the embodiments are illustrative, not restrictive, and cannot limit the protection scope of the present invention.

[0033] Structures, connections, etc. that are not described in detail in the present invention can be understood as conventional technical means in the art.

[0034] A deep recovery system for ammonia desulfurization flue gas whitening waste heat, such as figure 1 and figure 2 As shown, the system includes a desulfurization tower 1, a circulating water tank 18, a heat exchanger 16, an absorption heat pump unit 17, a flue gas cooling section 5, a flue gas heating section 15, an inlet flue 6 and an outlet flue 22. A concentration pool 2 and a desulfurization circulation pool 3 are arranged separately at the bottom of the desulfurization tower, and a concentration section a, a desulfurization section b, a water washing section c, and a demisting section d ar...

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Abstract

The invention relates to a system for desulfurization, white smoke elimination and deep waste heat recovery based on an ammonia process. The system comprises a desulfurization tower, a circulating water tank, a heat exchanger, an absorption heat pump unit, a flue gas cooling section, a flue gas heating section, an inlet flue and an outlet flue; the desulfurization tower above a concentration tankis coaxially provided with a concentration section, a desulfurization section, a water washing section and a defogging section from the top to bottom in sequence; the inlet flue is arranged on the desulfurization tower between the concentration tank and the concentration section in a communicated mode; the outlet flue is arranged at the top of the desulfurization tower above the defogging sectionin a communicated mode; the heat exchanger and the absorption heat pump unit can perform two-stage cooling on circulating water, and can perform two-stage heating on supplemented boiler water; the supplemented boiler water can flow through the heat exchanger and the absorption heat pump unit to achieve two-stage heating. The system has the advantages of high desulfurization efficiency and high heat recycling rate, and flue gas desulfurization, white smoke elimination and deep waste heat recovery can be simultaneously realized.

Description

technical field [0001] The invention belongs to the technical field of energy saving and environmental protection, in particular to a deep recovery system and application of ammonia desulfurization flue gas dewhitening waste heat. Background technique [0002] As environmental protection requirements become more and more stringent, in order to meet the new national emission standards, most domestic coal-fired power plants and chemical industries are undergoing ultra-low emission retrofits to achieve the concentration of smoke and sulfur dioxide at the chimney outlet not higher than 10, 35mg / Nm 3 emission requirements, some areas require the smoke concentration to be lower than 5mg / Nm 3 . At present, most power plants and chemical plants have adopted the wet desulfurization method to remove sulfur dioxide and dust in the flue gas. The flue gas temperature at the outlet of the desulfurization tower has dropped to about 50°C. At this time, the flue gas is usually saturated w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/50
CPCB01D53/504B01D2258/0283B01D2251/2062
Inventor 张飞龙刘海伦刘辉王会明刘国瑞司志娟
Owner AEROSPACE ENVIRONMENTAL ENG
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