Liquid-vapor vortex phase-change integrated desulfurization and by-product recovery process

A by-product, eddy current technology, applied in magnesium sulfate, gas treatment, chemical instruments and methods, etc., can solve the problems of complex equipment, low reaction efficiency, high system energy consumption, and achieve the effect of reducing emissions

Active Publication Date: 2019-03-01
承德信通首承科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only the water in the desulfurization process is recycled, and other by-products are not involved
[0004] The existing flue gas desulfurization equipment has technical problems such as low reaction efficiency, poor desulfurization effect, complicated equipment, and ineffective recycling of by-products, which makes the energy consumption of the entire system high

Method used

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  • Liquid-vapor vortex phase-change integrated desulfurization and by-product recovery process
  • Liquid-vapor vortex phase-change integrated desulfurization and by-product recovery process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] SO in flue gas 2 The initial concentration is 2000mg / Nm 3 , according to S1-S11, S41-S42, S111-S114 for desulfurization and recovery of by-products, SO in flue gas discharged after desulfurization 2 The concentration is 45mg / Nm 3 , lower than the concentration of 160mg / Nm in Comparative Example 1 3 .

[0088] project

[0089] The consumption of magnesium oxide powder is 800 tons, and the consumption of electricity is 3.125x10 5 kWh, 5,650 tons of water, 920 tons of steam, and 840 tons of magnesium sulfate monohydrate powder as a by-product. Calculated at a market price of 2,400 yuan / ton, the profit is 2.016 million yuan, and the total annual cost is 5.179 million yuan. In the comparative example, a total of 2.2513 million yuan was saved.

Embodiment 2

[0091] Instead of using S1, the sulfur-containing flue gas is directly reacted with the desulfurizer slurry, and the other steps are the same, the results are as follows: SO in the flue gas 2 The initial concentration is 2000mg / Nm 3 , SO in flue gas discharged after desulfurization 2 The concentration is 65mg / Nm 3 , lower than the latest national emission standard 200mg / Nm 3 , the consumption of magnesium oxide powder is 800 tons, and the consumption of electricity is 3.125x10 5 kWh, 5,650 tons of water, 920 tons of steam, 840 tons of magnesium sulfate monohydrate powder as a by-product, 2.016 million yuan in profit, and 5.179 million yuan in annual expenses.

Embodiment 3

[0092] Embodiment 3: The impurity removal step in S4 is only carried out once, and other steps are the same as in Embodiment 1. The results are as follows: SO in the flue gas 2 The initial concentration is 2000mg / Nm 3 , SO in flue gas discharged after desulfurization 2 The concentration is 45mg / Nm 3 , the consumption of magnesium oxide powder is 800 tons, and the consumption of electricity is 3.125x10 5 kWh, 5,650 tons of water, 920 tons of steam, 800 tons of by-product magnesium sulfate monohydrate powder, 1.92 million yuan in profit, and 5.2752 million yuan in annual expenses.

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Abstract

The invention belongs to the technical field of flue gas desulfurization, and provides a liquid-vapor vortex phase-change integrated desulfurization and by-product recovery process. The liquid-vapor vortex phase-change integrated desulfurization and by-product recovery process comprises the steps of pre-desulfurization, desulfurization, impurity removal of a desulfurizer mixed solution, purification of a magnesium sulfate solution and recovery of magnesium sulfate monohydrate powder. The technical problem that by-products of existing flue gas desulfurization equipment are not effectively recycled is solved.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization, and relates to a liquid-vapor vortex phase change integrated desulfurization and by-product recovery process. Background technique [0002] Sulfur dioxide in flue gas is extremely harmful to animals, plants and the ecological environment, especially for low-concentration sulfur dioxide. Due to its large content in flue gas and low treatment benefits, its effective treatment has become a major problem for a long time. At present, the main technical means to control SO2 pollution in the world is flue gas desulfurization. [0003] The invention patent application document with the application number 201611117057.5 records the technical scheme of using spraying method and equipment for desulfurization, but this method does not have sufficient contact between the desulfurization liquid and the sulfur-containing flue gas, resulting in incomplete desulfurization, and the equipment used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/50B01D53/80B01D53/83C01F5/40
CPCB01D53/50B01D53/508B01D53/75B01D53/80B01D53/83C01F5/40B01D2258/0283
Inventor 李成峰刘志伟徐霄龙
Owner 承德信通首承科技有限责任公司
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