Liquid solid separation method for processing gypsum serum
A gypsum slurry and solid separation technology, which is applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of poor wear resistance, complicated production and high cost, and achieves reduction of solid phase content, reduction of floor space, cost reduction effect
Inactive Publication Date: 2011-03-02
SHANGHAI RES INST OF CHEM IND
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Problems solved by technology
However, domestic hydrocyclones for FGD process are still in the development stage
At the same time, the entire dehydration system needs two sets of hydrocyclones (gypsum cyclones and waste water cyclones), which have a long process and high cost
Moreover, the gypsum suspension has a high solid content and is abrasive to a certain extent, which is severely abrasive to the hydrocyclone. The hydrocyclone is generally made of corundum lining, rubber lining or polyester plastic
Corundum lining, rubber lining has good wear resistance and corrosion resistance, but the production is complicated and the cost is high
Polyester plastic hydrocyclones are manufactured with high precision and low cost, but poor wear resistance
Method used
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Embodiment 1
[0026] like figure 1 Shown is a schematic flow chart for the separation of the gypsum hydrocyclone of the present invention, wherein 9 screw pumps, 10, 11, 12 electromagnetic flowmeters, and 13 diaphragm pressure gauges. The screw pump 9 is a power system, and the gypsum slurry in the gypsum slurry storage tank 14 to be treated is input in the gypsum hydrocyclone 1A, and after separation, the gypsum suspension with high solid content is obtained from the sedimentation of the gypsum hydrocyclone 1A. The sand nozzle 1 is discharged and collected, and the light phase and the slightly heavy phase are respectively discharged from the liquid outlet section 7 of the overflow center hole and the outlet section 8 of the overflow side outlet, and the electromagnetic flowmeters 10, 11, 12 measure the flow rates of each branch. Diaphragm pressure gauge 13 measures inlet pressure. Control the system pressure and flow by adjusting the valve, so that each amount is in a certain optimal stat...
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Abstract
The invention relates to a liquid-solid separation method for treating gypsum serum, which comprises: pumping the gypsum serum to be treated into a novel hydrocyclone through a pump from a liquid storage tank, obtaining gypsum suspension with high solid content after separation, exhausting and collecting the gypsum suspension from a desilting nozzle of the novel hydrocyclone, exhausting light phase from a liquid outlet section of an overflow center hole of the hydrocyclone to a wastewater disposal basin, and exhausting slightly heavy phase from a liquid outlet section on an overflow side faceand returning the slightly heavy phase to the liquid storage tank for recycling. The liquid-solid separation method controls the system pressure and the flow rate by adjusting a valve, and makes various flow rates in the optimum state. Compared with the prior art, the liquid-solid separation method has the characteristics of low cost, high efficiency and environmental protection.
Description
technical field [0001] The invention relates to a liquid-solid separation method, in particular to a liquid-solid separation method for processing gypsum slurry. Background technique [0002] my country's energy structure is dominated by coal, and thermal power plants use coal as the main raw material, which is the main source of my country's electricity supply. The flue gas emissions of thermal power plants are huge, and large desulfurization devices need to be equipped. Limestone / gypsum flue gas desulfurization is the most mature process technology, and the by-product produced in the process - gypsum, has many uses and can be comprehensively utilized. However, further innovation and improvement are needed on the equipment. Limestone / gypsum flue gas desulfurization process (FGD), including flue gas heat exchange system, absorption tower desulfurization system, desulfurizer pulping system, gypsum dehydration system and wastewater treatment system. The gypsum dehydration s...
Claims
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IPC IPC(8): C01F11/46B01D53/48
Inventor 都丽红陈隆隆郑庆增王士勇邵国兴李秋萍邓伯虎
Owner SHANGHAI RES INST OF CHEM IND