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Treatment method of sulfur removing pregnant solution

A technology for desulfurization rich liquid and treatment method, applied in the direction of separation method, chemical instrument and method, dispersion particle separation, etc., can solve the problem of large heat consumption, and achieve the effect of reducing energy consumption and reducing consumption

Active Publication Date: 2013-12-04
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages that a large amount of heat needs to be consumed to desorb sulfur dioxide and a large amount of cooling medium to be consumed to cool the desorbed sulfur dioxide-containing gas in the existing process of desorbing sulfur dioxide from desulfurized rich liquid , providing a new treatment method for desulfurized rich liquid, which greatly saves the energy consumption in the desorption process and the cooling medium consumption in the process of cooling the gas containing sulfur dioxide

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  • Treatment method of sulfur removing pregnant solution

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Effect test

Embodiment 1

[0019] This embodiment is used for the treatment method of the desulfurized rich liquid provided by the present invention.

[0020] Make the sulfur dioxide concentration 4000mg / Nm 3 The flue gas and the concentration of 2% by weight of tert-butylaminoethoxyethanol solution are countercurrently contacted in the absorption tower, the temperature of contact is 40 ℃, and the liquid-gas ratio of contact is 1kg / Nm 3 to obtain a desulfurized rich solution with a sulfur content calculated as sulfur dioxide of 1.5% by weight, and the temperature of the desulfurized rich solution is 40°C.

[0021] The desulfurized rich liquid is divided into two parts, and a part of the desulfurized rich liquid is heat-exchanged with the lean liquid (with a sulfur content of 0.5% by weight in terms of sulfur dioxide and a temperature of 100° C.) produced by the desorption tower with a reduced sulfur content, so that the The temperature of the desulfurized rich liquid is raised to 80°C; another part of ...

Embodiment 2

[0024] This embodiment is used for the treatment method of the desulfurized rich liquid provided by the present invention.

[0025] Make the sulfur dioxide concentration 3000mg / Nm 3 The flue gas and the concentration of 2% by weight of tert-butylaminoethoxyethanol solution are countercurrently contacted in the absorption tower, the temperature of contact is 45 ℃, and the liquid-gas ratio of contact is 1kg / Nm 3 , to obtain a desulfurized rich solution with a sulfur content of 3% by weight based on sulfur dioxide, and the temperature of the desulfurized rich solution is 45°C.

[0026] Divide the above-mentioned desulfurized rich liquid into two parts, make a part of the desulfurized rich liquid and the lean liquid with reduced sulfur content produced by the desorption tower (the sulfur content is 0.8% by weight in terms of sulfur dioxide, and the temperature is 95 ° C) to undergo heat exchange, so that the The temperature of the desulfurized rich liquid is raised to 70°C; anoth...

Embodiment 3

[0029] This embodiment is used for the treatment method of the desulfurized rich liquid provided by the present invention.

[0030]Make the sulfur dioxide concentration 4500mg / Nm 3 The flue gas and the concentration of 2% by weight of tert-butylaminoethoxyethanol solution are in countercurrent contact in the absorption tower, the temperature of contact is 50 ℃, and the liquid-gas ratio of contact is 1kg / Nm 3 , to obtain a desulfurized rich solution with a sulfur content of 4% by weight based on sulfur dioxide, and the temperature of the desulfurized rich solution is 50°C.

[0031] The above-mentioned desulfurized rich liquid is divided into two parts, and a part of the desulfurized rich liquid is heat-exchanged with the lean liquid (the sulfur content is 1% by weight and the temperature is 105 ° C) produced by the desorption tower to generate the desulfurized rich liquid. The temperature of the desulfurized rich liquid is raised to 85°C; another part of the desulfurized rich ...

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Abstract

The invention discloses a treatment method of a sulfur removing pregnant solution. The method comprises the following steps of: dividing the sulfur removing pregnant solution into two parts, and performing heat exchange between a first part of sulfur removing pregnant solution and a first heating medium to obtain a heated sulfur removing pregnant solution A; and performing heat exchange between the other part of sulfur removing pregnant solution and the second heating medium to obtain a heated sulfur removing pregnant solution B, and desorbing the heated sulfur removing pregnant solution A and the heated sulfur removing pregnant solution B under a desorption condition to obtain a gas containing sulfur dioxide and a barren solution with lowered sulfur content, wherein the first heating medium is a barren solution with lowered sulfur content; and the second heating medium is a gas containing sulfur dioxide. According to the method provided by the invention, energy consumption in a desorption process can be lowered, and the consumption of a cooling medium used in a process for cooling the gas containing sulfur dioxide can be lowered simultaneously.

Description

technical field [0001] The invention relates to a treatment method for desulfurized rich liquid. Background technique [0002] The development of flue gas desulfurization technology has a history of 100 years. There are more than ten kinds of technology applied in industry. The principles of these technology are basically the same, mainly using alkaline absorbent and acid gas SO x The stable compound produced by the reaction exists in the solid phase and / or liquid phase, thereby realizing flue gas desulfurization. From the perspective of circular economy, absorbents used in flue gas desulfurization technology are mainly divided into two types: renewable and non-renewable. Since non-renewable absorbents cannot be recycled, there is a 2 Small absorption will lead to pipeline blockage and serious corrosion, and generate low value-added or useless waste gas products, resulting in secondary pollution problems. In contrast, renewable absorbents (such as organic amine desulfuriz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
Inventor 邱正秋张初永彭良虎朱玉萍王建山任毅罗义文
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES