Absorbent preparation method

An absorbent and equation technology, applied in the field of absorbent preparation, can solve the problems of complex system and high cost of system equipment

Inactive Publication Date: 2015-01-14
SHANGHAI CANZHOU ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, large-scale DCS is used in the existing absorbent preparation control, so there are disadvantages such as complex system and high cost of system equipment

Method used

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Embodiment Construction

[0035] This specific embodiment adopts the following technical scheme: it contains a functional module, which is characterized in that, according to the chemical reaction equation, the mixing amount of the reacting substance and water is calculated to realize the automatic ratio; the module includes the ratio calculation, the normal ratio Process control and reset; also includes the following:

[0036] A. According to the normal operation mode, set the lime concentration to 13%, and calculate the mixing amount of water and lime based on the weight ratio and the following formula:

[0037] The total amount of water in the preparation tank: X% = W1 + W2,

[0038] among them,

[0039] W1: The amount of water required for the maturation reaction

[0040] W2: The amount of water needed to reach the required concentration

[0041]

[0042] Among them, CaO is the required dosage;

[0043]

[0044] Among them, CaO is the required dosage;

[0045] Then the total water volume W3 required to dilute ...

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Abstract

The invention discloses an absorbent preparation method, and relates to the technical field of flue gas purification; according to a chemical reaction equation, the mixing amounts of a reacting substance and water are calculated, and automatic proportioning is realized; a module includes proportioning calculation, normal proportioning process control and resetting; the module also includes the following contents: A, according to a normal operation mode, setting the concentration of lime to be 13%, and calculating the mixing amounts of water and the lime according to the weight ratio; B, setting a function module FB; C, when conditions are met, allowing the function module FB to be outputted according to a normal valve state corresponding to valve state database, and controlling an opening or closing action of a valve; and D, selecting a reset function through the function module FB. The preparation method is combined with the special function module to realize the automatic proportioning, achieves the high-reliability and unique-function control system, and replaces a large-scale DCS control system device.

Description

Technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a method for preparing an absorbent. Background technique [0002] The limestone, lime-gypsum wet flue gas desulfurization process uses cheap and easily available limestone as the desulfurization absorbent. The limestone is crushed and ground into powder and mixed with water to make a certain concentration of absorption slurry. In the absorption tower, the absorption slurry contacts and mixes with the flue gas. The sulfur dioxide in the flue gas reacts with the calcium carbonate in the slurry and the air blown in. The final reaction product is gypsum. At the same time, some other pollutants in the flue gas are removed, such as dust, HCI, HF, etc. After desulfurization, the flue gas is removed by a mist eliminator to remove the small liquid droplets carried out, and is heated by the heat exchanger and then discharged into the chimney. The desulfurized gypsum slurry is r...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50
Inventor 吴平
Owner SHANGHAI CANZHOU ENVIRONMENTAL ENG
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