Heat pump regeneration process for desulphurization solvent used in flue gas desulphurization by solvent cyclic absorption method

A solvent circulation and absorption technology, applied in separation methods, heat recovery systems, climate sustainability, etc., can solve the problems of high energy consumption, hinder the popularization and application of solvent circulation absorption flue gas desulfurization process, and achieve low energy consumption and low energy consumption. Operating costs and the effect of recycling

Active Publication Date: 2011-10-26
成都华西工业气体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This energy-intensive regeneration method has become a technical bottleneck restricting the further development of the solvent circulation absorption flue...

Method used

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  • Heat pump regeneration process for desulphurization solvent used in flue gas desulphurization by solvent cyclic absorption method
  • Heat pump regeneration process for desulphurization solvent used in flue gas desulphurization by solvent cyclic absorption method

Examples

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Embodiment 1

[0025] Taking the heat pump regeneration of the desulfurization solvent in the flue gas desulfurization of the sintering flue gas of the iron and steel plant as an example, combined with figure 1 The present invention will be described.

[0026] The desulfurization solvent-rich liquid from the desulfurization section is heated to 90°C through the lean-rich liquid heat exchanger and the desulfurization solvent lean liquid from the bottom of the regeneration tower, and then sent to the regeneration tower. The steam rising from the kettle is used for countercurrent contact, and the SO contained in it is desorbed by heating and stripping. 2 and make it regenerate. The desulfurized solvent lean liquid obtained after desorption is discharged from the tower kettle, and after heat exchange with the rich liquid by the lean liquid heat exchanger, it enters the lean liquid cooler, and is cooled to 31°C by water cooling before being sent to the desulfurization section for use.

[0027]T...

Embodiment 2

[0030] Taking the heat pump regeneration of the desulfurization solvent in the flue gas desulfurization of the sintering flue gas of the iron and steel plant as an example, combined with figure 1 The present invention will be described.

[0031] The desulfurization solvent-rich liquid from the desulfurization section is heated to 100°C through the lean-rich liquid heat exchanger and the desulfurization solvent lean liquid from the bottom of the regeneration tower, and then sent to the regeneration tower. The steam rising from the kettle is used for countercurrent contact, and the SO contained in it is desorbed by heating and stripping. 2 and make it regenerate. The desulfurized solvent lean liquid obtained after desorption is discharged from the tower kettle, and after heat exchange with the rich liquid through the lean liquid heat exchanger, it enters the lean liquid cooler, and is cooled to 38°C by water cooling before being sent to the desulfurization section for use.

[...

Embodiment 3

[0035] Taking the heat pump regeneration of the desulfurization solvent in the flue gas desulfurization of the sintering flue gas of the iron and steel plant as an example, combined with figure 1 The present invention will be described.

[0036] The desulfurization solvent-rich liquid from the desulfurization section is heated to 96°C through the lean-rich liquid heat exchanger and the desulfurization solvent lean liquid from the bottom of the regeneration tower, and then sent to the regeneration tower. The steam rising from the kettle is used for countercurrent contact, and the SO contained in it is desorbed by heating and stripping. 2 and make it regenerate. The desulfurized solvent lean liquid obtained after desorption is discharged from the tower kettle, and after heat exchange with the rich liquid through the lean liquid heat exchanger, it enters the lean liquid cooler, and is cooled to 34°C by water cooling before being sent to the desulfurization section for use.

[0...

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Abstract

The invention relates to a heat pump regeneration process for a desulphurization solvent used in flue gas desulphurization by the solvent cyclic absorption method. According to the invention, regeneration gas produced in the regeneration of a desulphurization solvent is compressed by a compressor so as to obtain high temperature high pressure superheated steam, and the superheated steam is used as a heat source to heat and vaporize regeneration tower bottoms, thereby recycling afterheat of the low temperature regeneration gas at tower top; therefore, the heat pump regeneration process for a desulphurization solvent used in flue gas desulphurization by the solvent cyclic absorption method is formed, and the process has the characteristics of high efficiency, low energy consumption and low operation cost. The invention is applicable to flue gas desulphurization in a plurality of fields like steel, non-ferrous metallurgy, thermoelectricity, chemicals, building materials, etc.

Description

technical field [0001] The invention relates to a heat pump regeneration process of a desulfurization solvent in flue gas desulfurization by solvent circulation absorption method, and is mainly applicable to the field of flue gas desulfurization by solvent circulation absorption method in industries such as iron and steel, nonferrous metallurgy, thermal power, chemical industry, and building materials. Background technique [0002] At present, there are many flue gas desulfurization methods used in China, such as limestone-gypsum method, double alkali method, magnesium oxide method, etc. Disadvantages such as large land area, difficult utilization of desulfurization by-products and difficult disposal of waste. With the development of technology, the flue gas desulfurization technology of solvent circulation absorption method that has appeared in recent years has been widely valued at home and abroad because of its short process flow, recyclable desulfurization solvent, and h...

Claims

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Application Information

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IPC IPC(8): B01D53/18
CPCY02B30/52
Inventor 汪然李东林郎治
Owner 成都华西工业气体有限公司
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