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A treatment process for deep heat collection and purification of flue gas

A technology for processing technology and flue gas, which is applied in gas processing, heat exchangers, indirect heat exchangers, etc. Corrosion and other problems, to achieve the effect of eliminating "white smoke" pollution, ultra-low emission, and realizing emission

Active Publication Date: 2021-04-06
南京圣卡孚科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are significant defects in this method: First, the low-temperature flue gas still contains suspended solids and trace acids after desulfurization. Although the gas-liquid contact method can be used to exchange waste heat, the water in the water dissolves considerable impurities such as ash, and then used at high temperature The heat exchange of the flue gas and the generation of steam will inevitably lead to corrosion and fouling inside the heat exchange tubes of subsequent equipment, which will accumulate rapidly, which will seriously affect the heat exchange efficiency and safe use of heat exchangers and evaporators
Secondly, the steam generated by this technical route contains a small amount of acid gas and carbon dioxide, which will also cause corrosion and damage to the heat pump compressor

Method used

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  • A treatment process for deep heat collection and purification of flue gas
  • A treatment process for deep heat collection and purification of flue gas
  • A treatment process for deep heat collection and purification of flue gas

Examples

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Embodiment 1

[0056] Such as figure 2 As shown, a treatment process for deep heat collection and purification of flue gas is used for flue gas treatment of natural gas boilers. The flue gas parameters of natural gas boilers are shown in Table 1. The process of this embodiment only includes waste heat recovery units.

[0057] The waste heat recovery unit device includes: a heat exchange area, a circulating pump, and a water preheating section 5, wherein the heat exchange area is separated from the gas-liquid outside the flue 6 by the tube side in the flue 6 as a self-wetting heat exchange tube bundle for cooling water package, steam compressor, and cooling water replenishment nozzle and production nozzle; the self-wetting heat exchange tube bundle in the heat exchange area is connected with the vapor-liquid isolation package; the steam pipe at the top of the vapor-liquid isolation package is connected with the inlet of the steam compressor, The outlet of the steam compressor communicates wi...

Embodiment 2

[0070] Such as image 3 As shown, a treatment process for deep heat collection and purification of flue gas is used for refining flue gas treatment. It consists of a waste heat recovery unit, a desulfurization unit, and a purification and white smoke elimination unit. The refining flue gas parameters are shown in Table 2.

[0071] The waste heat recovery unit device includes: a heat exchange area, a circulating pump, and a water preheating section 5, wherein the heat exchange area consists of a self-wetting heat exchange tube bundle in which the tube side in the flue 6 is cooling water, and the vapor-liquid outside the flue 6 Isolation package, steam compressor, and cooling water supply nozzle and production nozzle; the self-wetting heat exchange tube bundle in the heat exchange area is connected with the vapor-liquid isolation package; the steam pipe at the top of the vapor-liquid isolation package is connected with the inlet of the steam compressor , the outlet of the steam ...

Embodiment 3

[0087] Such as Figure 4 As shown, a treatment process for deep heat collection and purification of flue gas is used for flue gas treatment in coking plants. It is composed of waste heat recovery unit, desulfurization unit and white smoke purification unit.

[0088] The waste heat recovery unit device includes: a heat exchange area, a circulating pump, and a water preheating section 5, wherein the heat exchange area consists of a self-wetting heat exchange tube bundle in which the tube side in the flue 6 is cooling water, and the vapor-liquid outside the flue 6 Isolation package, steam compressor, and cooling water supply nozzle and production nozzle; the self-wetting heat exchange tube bundle in the heat exchange area is connected with the vapor-liquid isolation package; the steam pipe at the top of the vapor-liquid isolation package is connected with the inlet of the steam compressor , the outlet of the steam compressor is connected with the steam main pipe; the bottom of th...

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Abstract

The invention relates to a treatment process for deep heat collection and purification of flue gas, which relates to the technical fields of heating technology and waste gas purification. The present invention is composed of three units of waste heat recovery, desulfurization and purification of white smoke. Boiling point vaporization absorbs heat, so that the waste heat of the flue gas is recovered in the form of steam, and then discharged through the preheating section; the cooled flue gas after heat absorption can reduce the water evaporation when it enters the desulfurization unit; the flue gas discharged from the desulfurization unit is purified and whitened The smoke unit is discharged after spray cooling, film demisting, and reheating of the flue gas. On the one hand, the present invention can recover more waste heat of the flue gas in the form of steam with higher heat enthalpy, and on the other hand, can further purify the flue gas deeply, realizing ultra-low emission without "white smoke" at the flue gas outlet.

Description

technical field [0001] The invention relates to the technical fields of heating technology and waste gas purification, in particular to a treatment process for deep heat collection and purification of flue gas. Background technique [0002] my country is one of the countries with the largest flue gas emissions in the world today, and the flue gas emissions are mainly concentrated in the fields of electric power, refining, heat, coking, and metallurgy. According to relevant specifications, the temperature of flue gas before entering desulfurization is basically controlled between 130 and 180°C, and some even exceed 200°C. How to fully recover and utilize the waste heat of the flue gas and minimize the discharge of waste heat is one of the main issues faced by technical workers in this field. [0003] At the same time, in order to control smog pollution, it is imperative to eliminate the "white smoke" when the smoke is emitted. Most of the white smoke emitted from the chimne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/00B01D47/06F28D21/00
CPCB01D47/06B01D53/00B01D2258/0283F28D21/0014B01D53/343B01D53/48B01D2257/30Y02P70/10
Inventor 陆剑鸣陈忠李保国程新华
Owner 南京圣卡孚科技有限公司
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