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Process equipment for preparing gypsum

A process equipment, gypsum technology, applied in the separation of dispersed particles, chemical/physical/physical-chemical processes, chemical instruments and methods, etc., can solve the problems of poor stability of gypsum desulfurization process, difficult to handle and utilize gypsum, etc. Up to standard, low cost, good stability

Inactive Publication Date: 2016-01-27
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the main purpose of the present invention is to solve the problem of poor stability of the currently used gypsum desulfurization process, and the problem that the remaining gypsum after desulfurization is difficult to handle and utilize, and to provide a method that can make The desulfurization process has good stability, and at the same time, the gypsum production method that can obtain qualified gypsum products

Method used

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  • Process equipment for preparing gypsum

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Such as figure 1 As shown, a process equipment for making gypsum is prepared by using the absorption tower 1 used in flue gas desulfurization, and the absorption tower 1 here is an existing equipment. In the preparation method of the present invention, also comprise limestone slurry forming mechanism, described limestone slurry forming mechanism is made of pulverizer 2 and limestone slurry pool 3, the pulverizer 2 here can select multiple models and products for use, as mine Mongolian mill, high-pressure suspension roller mill, high-pressure micro-powder mill, etc., the pulverizer 2 pulverizes the limestone raw material to obtain lime powder, and the lime powder is transported to the limestone slurry pool 3 through pipelines, and the lime powder is Lime slurry is formed after being stirred in the limestone slurry tank 3 , the mass ratio...

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Abstract

The invention discloses process equipment for preparing gypsum by virtue of an absorption tower used during flue gas desulfurization. The process equipment comprises a limestone slurry forming mechanism, an oxidation air preparation mechanism and a water supply mechanism, wherein sulfur-containing flue gas in a boiler is transferred into the absorption tower through a pipeline; lime slurry in the absorption tower is extracted and transferred to a slurry circulating pipeline by a circulating pump and is jetted down from the top of the absorption tower through nozzles; lime slurry reacts with sulfur-containing flue gas to generate suspended calcium sulfite particles, and the suspended calcium sulfite particles are oxidized in lime slurry at the bottom of the absorption tower to generate primary gypsum particles; the primary gypsum particles are discharged from the absorption tower by a gypsum discharging pump and is transferred to a gypsum slurry buffer tank; gypsum slurry is subjected to primary dehydration by a gypsum rotational flow station to generate secondary gypsum, and the secondary gypsum is subjected to secondary dehydration by a vacuum belt filter to generate finished gypsum. The equipment is relatively good in stability and can be used for preparing reliable gypsum products, and the cost is greatly lowered.

Description

technical field [0001] The invention relates to a process equipment for making gypsum, which belongs to the technical field of environmental protection. Background technique [0002] my country's energy composition is dominated by coal, and its consumption accounts for about 70% of the total primary energy consumption. Although the application of new energy is becoming more and more extensive, the situation dominated by coal will not be possible for a long time in the future. Difficult to change. For example, thermal power plants use coal as the main fuel to generate electricity, and the direct combustion of coal releases a large amount of SO 2 , which will cause air pollution, and with the increase of installed capacity, SO 2 emissions are also increasing, increasing SO 2 The degree of control becomes very urgent and necessary. Now for SO 2 There are three main control methods: desulfurization before combustion, desulfurization during combustion, and desulfurization a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00B01D53/80B01D53/50
Inventor 赵玉青陈希崔欣王丽梅王静
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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