Device and method for dual-loop supply flow adjustment of desulfurization slurry
A dual-circuit slurry supply technology, applied in the energy field, can solve the problems of corrosive equipment, low desulfurization efficiency, and easy clogging, and achieve the effects of ensuring normal operation, improving utilization rate, and avoiding clogging
Pending Publication Date: 2018-02-02
HUADIAN ELECTRIC POWER SCI INST CO LTD
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Problems solved by technology
This utility model has the disadvantages of low desulfurization efficiency, waste of resources, easy corrosion of equipment, and easy occurrence of blockage.
Method used
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[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.
[0031] Example.
[0032] see Figure 1 to Figure 4 shown.
[0033] The method for adjusting the flow rate of the desulfurized slurry by the double circuit in this embodiment includes the following methods:
[0034] Step 1: Including two control loops, each of which contains a PID module, respectively filtering the pH values of the two gypsum slurry measuring points in the absorption tower in one of the control loops;
[0035] Step 2: Input the filtered pH values of the two gypsum slurry measuring points into the 2XMTR module. The 2XMTR module takes the average value of the pH values of the two gypsum slurry measuring points. The average value of the 2XMTR module is the pH value of the gypsum slurry. Process...
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The invention relates to a device and method for dual-loop supply flow adjustment of a desulfurization slurry and belongs to the technical field of energy. At present, desulfurization slurry supply equipment in power plants has slow changes in slurry pH, namely a controlled object has the defects such as large inertia and severe lag. An outlet of a heat exchanger is connected with a heat exchangeinlet of a desulfurizing column through a fifth pipeline, a slurry supply pump is connected with a slurry supply port of the desulfurizing column through a first pipeline, an oxidizing fan is connected with a fan port of the desulfurizing column through a second pipeline, an inlet of a circulating pump is connected with a circulating outlet of the desulfurizing column through a third pipeline, anoutlet of the circulating pump is connected with a sprinkling layer through a fourth pipeline, both a demister and the sprinkling layer are positioned in the desulfurizing column, the demister is positioned above the sprinkling layer, and an inlet of the heat exchanger is connected with a heat exchange outlet of the desulfurizing column through a sixth pipeline. Compared with the prior art, the device and method have the advantages that great fluctuation of slurry supply flow in case of great changes in unit load is effectively avoided, and the slurry supply flow is stabilized.
Description
technical field [0001] The invention relates to a device and method for adjusting the flow rate of desulfurization slurry with double loops, specifically using the pH value of limestone-gypsum slurry and the SO 2 The invention relates to the coordinated control of the slurry flow rate, which belongs to the field of energy technology. Background technique [0002] At present, the desulfurization slurry supply in power plants generally adjusts the slurry supply flow through a single PID control loop that adjusts the pH value of the gypsum slurry. In this control method, due to the large volume of the slurry pool in the absorption tower, the pH value of the slurry changes slowly, that is, the controlled object has the characteristics of large inertia and serious hysteresis, resulting in SO 2 The concentration often exceeds the standard, and the operator needs to manually adjust the slurry supply valve frequently. On the one hand, it is easy to cause desulfurization outlet SO ...
Claims
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Login to View More IPC IPC(8): B01D53/50B01D53/80
CPCB01D53/346B01D53/504B01D2251/606B01D2251/608B01D2251/404Y02P90/02
Inventor 祝宝营姜宪珍王真宋瑞福邱树良陶蕊张岩
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD