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Method for removing heat stable salt

A thermally stable salt removal technology, applied in separation methods, chemical instruments and methods, ion exchange of chelates, etc., can solve the problems of slow exchange speed, long time, small exchange area of ​​ion exchange resin, etc., and achieve reduction The effect of small investment, increased exchange area, and increased speed

Inactive Publication Date: 2008-01-16
CHINA PETROCHEMICAL CORP +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0010] The present invention aims to solve the problem that the ion exchange resin used in the prior art for removing thermally stable salts has a small exchange area, a slow exchange speed, and a long time for the exchange process, and proposes a new method for removing amines by using an ion exchange resin. Method for Thermally Stabilizing Salts in Adsorbents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Pack small spherical ion exchange resins with a diameter of 0.1 mm in an ion exchange resin tower with a height-to-diameter ratio of 4:1. The operating temperature of the tower is 20 ° C; the amine containing heat-stable salt concentration is 0.6 mol / L The quasi-adsorbent passes through the ion exchange resin tower at a space velocity of 1.0 / h, and the outlet thermally stable salt concentration is 0.06mol / L.

[0021] 2) 5% NaOH aqueous solution, at a temperature of 30° C., at a space velocity of 1.0 / h to regenerate the ion exchange resin tower.

Embodiment 2

[0023] 1) Fill the tower with a small spherical ion exchange resin with a diameter of 0.15 mm and a height-to-diameter ratio of 3:1. Under the condition of the operating temperature of the tower being 30 ° C, the amine adsorbent containing a heat-stable salt concentration of 0.65 mol / L Pass through the ion exchange resin tower at a space velocity of 1.5 / h, and the outlet thermally stable salt concentration is 0.052mol / L;

[0024] 2) 2% NaOH aqueous solution, at a temperature of 40°C, regenerates the ion exchange resin column at a space velocity of 1.3 / h.

Embodiment 3

[0026] 1) Pack a small spherical ion exchange resin with a diameter of 0.17 mm in a tower with a height-to-diameter ratio of 2:1. Under the condition that the operating temperature of the tower is 40 ° C, the heat-stable salt concentration is 0.60 mol / L The amine adsorbent passes through the ion exchange resin tower at a space velocity of 2.5 / h, and the outlet thermally stable salt concentration is 0.042mol / L;

[0027] 2) 8% NaOH aqueous solution, at a temperature of 45°C, regenerates the ion exchange resin column at a space velocity of 1.5 / h.

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Abstract

The invention discloses a method for removing heat stable salts. The method can solve the problems that the exchanged area of the ion exchange resin used for removing heat stable salts is small, the exchange speed is slow and the time of the exchange process is rather long in the prior art. The invention adopts the method that the small ball shape ion exchange resin with the diameter of the particle between 0.1-0.17mm is filled in an ion exchange resin tower with the height-to-diameter ratio of four to one-two to one, the amine adsorbent containing heat stable salts with the concentration beyond 0.55mol / L passes through the ion exchange resin tower by the space velocity of 1.0-3.0 / h under the temperature of 20-60 DEG C, when the amine adsorbent solution of the inlet and outlet of the ion exchange resin tower have the same pH value, the regeneration and circulation utilization can be conducted by the ion exchange resin tower.

Description

technical field [0001] The invention belongs to the regeneration method of amine absorbents, and relates to a method for removing heat-stable salts in amine absorbents. Background technique [0002] Use and disposal of fossil fuels that contain sulfides produce SO X , SO X Environmental pollution is also the main source of acid rain. With the increasingly stringent environmental protection laws and regulations, people attach great importance to environmental protection. Flue gas desulfurization technology can effectively reduce SO in the atmosphere X , thereby reducing the formation of acid rain. In flue gas desulfurization technology, especially in renewable flue gas desulfurization technology, the problem of heat-stable salts that are difficult to remove will be encountered. In the flue gas desulfurization process, the flue gas usually contains about 10% (volume) of SO 3 , the SO not removed in the washing stage 3 It will be absorbed by the absorption liquid in the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/96B01D15/36
Inventor 陈卫红刘金龙裴旭东张洁王秀珍
Owner CHINA PETROCHEMICAL CORP
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