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Control method and control system of lime slurry and cooling water dosage in deacidification tower

A control method and technology for cooling water flow, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of waste of lime consumables, increase the cost of fly ash disposal, etc., to reduce the corrosion effect and ensure the deacidification reaction efficiency. , The effect of saving lime consumables

Active Publication Date: 2022-08-02
EVERBRIGHT ENVIRONMENTAL TECH EQUIP CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, a large amount of lime slurry is used as cooling water, resulting in a serious waste of lime consumables and increasing the cost of subsequent fly ash disposal

Method used

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  • Control method and control system of lime slurry and cooling water dosage in deacidification tower
  • Control method and control system of lime slurry and cooling water dosage in deacidification tower
  • Control method and control system of lime slurry and cooling water dosage in deacidification tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] figure 1It is a flow chart of the method for controlling the dosage of lime slurry and cooling water in the deacidification tower of the present invention.

[0048] like figure 1 As shown, Embodiment 1 provides a method for controlling the dosage of lime slurry and cooling water in a deacidification tower, including: obtaining the lime slurry dosage flow in the deacidification tower according to the acid gas index of the flue gas; according to the lime slurry dosage flow Obtain the cooling water injection flow in the deacidification tower; and control the corresponding regulating valve according to the inlet temperature of the deacidification tower, the lime slurry injection flow and the cooling water injection flow, so as to realize the lime slurry and cooling water injection in the semi-dry process of the waste incineration power plant. The control of the addition amount and the stable control of the outlet temperature of the deacidification tower at about 150 °C can...

Embodiment 2

[0074] figure 2 It is the principle block diagram of the lime slurry and cooling water dosage control system of the deacidification tower involved in the present invention.

[0075] like figure 2 As shown, on the basis of Embodiment 1, Embodiment 2 also provides a lime slurry and cooling water dosage control system for a deacidification tower, including: a control module (such as a PID control module), and the control module Controlled lime slurry flow regulating valve (lime slurry regulating valve) and cooling water flow regulating valve (cooling water regulating valve); the control module is adapted to adjust the lime slurry flow regulating valve according to the lime slurry dosing flow; and the control module is adapted to Adjust the cooling water flow control valve according to the cooling water dosing flow.

[0076] In this embodiment, the control module is adapted to use the lime slurry and cooling water dosage control method of the deacidification tower in Example 1...

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Abstract

The invention belongs to the subdivision technical field of flue gas purification and treatment of domestic waste incineration power generation treatment, and in particular relates to a method and a control system for controlling the dosage of lime slurry and cooling water of a deacidification tower, wherein the lime slurry and cooling water of the deacidification tower are The dosage control method includes: obtaining the lime slurry dosage flow in the deacidification tower according to the flue gas acid gas index; obtaining the cooling water dosage flow in the deacidification tower according to the inlet temperature of the deacidification tower and the lime slurry dosage flow; and according to the lime slurry The dosing flow and cooling water dosing flow control the corresponding regulating valve, realize the control of the lime slurry and cooling water dosage in the semi-dry process of the waste incineration power plant, and stably control the outlet temperature of the deacidification tower at about 150 °C, effectively ensuring the deacidification. The reaction efficiency can also effectively avoid dew condensation in the subsequent equipment, reduce the corrosive effect of flue gas on equipment such as bag dust removal, meet the stable and up-to-standard flue gas emission indicators, save lime consumables, and further reduce the cost of fly ash disposal.

Description

technical field [0001] The invention belongs to the subdivision technical field of flue gas purification treatment of domestic waste incineration power generation treatment, and particularly relates to a method and a control system for controlling the dosage of lime slurry and cooling water of a deacidification tower. Background technique [0002] Flue gas from combustion in waste incineration power plants contains a lot of HCl and SO 2 The gas must be deacidified to meet the specified emission standards. Otherwise, they will face strict administrative penalties and very bad social influence. At present, the common deacidification processes include dry deacidification, semi-dry deacidification, and wet deacidification. Among them, although the wet process has high deacidification efficiency, the construction cost and operation cost are also very high, and waste water will be generated, so most waste incineration power generation projects do not have a supporting wet proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/68B01D53/50B01D53/34
CPCB01D53/502B01D53/68B01D53/346B01D2257/2045
Inventor 杨应永张二威洪益州钱中华朱亮张晓军李锋
Owner EVERBRIGHT ENVIRONMENTAL TECH EQUIP CHANGZHOU
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