Thermal power generating unit wet desulphurization absorption tower slurry concentration control system and method thereof
A slurry concentration and control system technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve problems affecting equipment safety, desulfurization efficiency damage, and increased workload, so as to ensure control quality and avoid The effect of loss influence
Pending Publication Date: 2021-03-02
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology
Excessive concentration of slurry in the absorption tower will increase the workload of circulating pumps, discharge pumps and other equipment, resulting in increased power consumption. It will also cause gypsum deposition in slurry pipes, demisters, and inlet flues, which will affect equipment safety. Reduced quality of gypsum generation
If the slurry concentration of the absorption tower is too low, the desulfurization efficiency will be damaged, which will affect the desulfurization environmental protection indicators
Method used
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Embodiment Construction
[0024] The present invention is described in further detail below in conjunction with accompanying drawing:
[0025] refer to figure 1 and figure 2 , the thermal power unit wet desulfurization absorption tower slurry concentration control system of the present invention includes an electromagnetic flowmeter 1, an absorption tower 2, a slurry circulation pump 3, a concentration meter 4, a slurry discharge pump 5, a slurry regulating valve 6 and a control system 7;
[0026] The limestone slurry enters the absorption tower 2 through the slurry pipeline, and the electromagnetic flowmeter 1 is installed on the slurry pipeline. The bottom of the absorption tower 2 is connected to the inlet of the slurry circulation pump 3, and the outlet of the slurry circulation pump 3 is connected to the inlet of the concentration meter 4. The outlet of the concentration meter 4 is connected to the top of the absorption tower 2, the inlet of the slurry discharge pump 5 is connected to the bottom...
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The invention discloses a thermal power generating unit wet desulphurization absorption tower slurry concentration control system and a method thereof, and the system comprises an electromagnetic flowmeter installed on a limestone slurry inlet pipeline, a slurry circulating pump connected with the bottom of the absorption tower, a concentration meter connected with an outlet of the slurry circulating pump, a slurry discharge pump connected with the bottom of the absorption tower, and a slurry regulating valve connected with the outlet of the slurry discharge pump; wherein a signal end of the electromagnetic flowmeter and a signal end of the concentration meter are connected with an input end of the control system, and an output end of the control system is connected with the regulating valve; when the concentration of the slurry in the absorption tower is increased, the control system can fully consider the change of the liquid inlet amount of the limestone slurry, the loss influence of frequent opening and closing of the gypsum slurry regulating valve on the valve is avoided while the discharge amount of the gypsum slurry is accurately controlled, and the control quality of the slurry concentration of the absorption tower is ensured.
Description
technical field [0001] The invention belongs to the technical field of desulfurization control for thermal power generating units, and relates to a slurry concentration control system and method for wet desulfurization absorption towers of thermal power generating units. Background technique [0002] The process of using limestone-gypsum for desulfurization is the most typical wet desulfurization process today, with a wide range of applications and high desulfurization efficiency. This process uses limestone as an absorbent to absorb sulfur dioxide, sulfur trioxide and other substances in the flue gas, and finally generates gypsum to achieve the purpose of removing sulfur oxides. [0003] As an important control index in the wet desulfurization process, the concentration of the slurry in the absorption tower has an extremely important impact on the energy consumption, safety, oxidation reaction and even the quality of the gypsum of the desulfurization system. Excessive conc...
Claims
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IPC IPC(8): B01D53/78B01D53/50B01D53/34
CPCB01D53/346B01D53/502B01D53/78
Inventor 郭亦文耿林霄高林王林卢彬王明坤侯玉婷周俊波赵章明
Owner XIAN THERMAL POWER RES INST CO LTD