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Method for judging dewatering performance of different plasters

A dehydration performance and gypsum technology, applied in flow characteristics, instruments, analysis materials, etc., can solve the problems of long time-consuming constant weight, inability to predict slurry dehydration performance, increase in sewage cost, etc., to achieve fewer instruments, strong application value, The effect of simple operation

Active Publication Date: 2010-12-15
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the end of 2003, the State Environmental Protection Administration issued the newly revised pollutant emission standard GB13223-2003 "Emission Standard of Air Pollutants for Thermal Power Plants", which stipulated the corresponding air pollutant emission control requirements for thermal power plant construction projects in different periods; at the same time , the country's new "Solution Fee Collection Standard and Calculation Method" increases the SO2 pollution cost of enterprises
[0006] This measurement method is relatively feasible under laboratory conditions, but it is difficult to implement in the operation site of the desulfurization process because it takes a long time to dry to constant weight and requires equipment such as ovens and balances; in addition, this test method only It can be carried out after the dehydration of gypsum, and cannot play a role in predicting the dehydration performance of the slurry
[0007] So far, there have been no reports at home and abroad to judge the dehydration performance of gypsum directly through the sedimentation performance of the slurry

Method used

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  • Method for judging dewatering performance of different plasters
  • Method for judging dewatering performance of different plasters
  • Method for judging dewatering performance of different plasters

Examples

Experimental program
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Embodiment 1

[0021] A method for judging the dehydration performance of different gypsums, the method is: take three different underflow slurries of the gypsum cyclone to be tested in a beaker, add water to adjust the density of the three slurries to 1.1g / ml, and use such as figure 1 Measure the three kinds of slurries with the same density to the 0cm scale line of the coordinate paper (marked as measuring cylinder 1, 2 and 3) in the measuring cylinder with the height scale coordinate paper attached to the outer wall of the shown, stir evenly, let it stand still, and measure the solid in each measuring cylinder reach the same settlement height (such as figure 2 Shown, the settlement height is the vertical distance between the liquid surface and the solid-liquid interface).

[0022] It is known through measurement that the time required for the solid settlement height in measuring cylinder 1 to stop at 14cm is 6.5 minutes, the time required for the solid settlement height in measuring cyli...

Embodiment 2

[0024] A method for judging the dehydration performance of different gypsums. The method is as follows: respectively take two different underflow slurries of the gypsum cyclone to be tested with a beaker, add water to adjust the density of the two slurries to 1.1g / ml, and use such as figure 1 Measure the two kinds of slurries with the same density to the 0cm scale line of the coordinate paper (marked as graduated cylinder d and e) respectively from the measuring cylinder with the height scale coordinate paper attached to the outer wall of the shown. The time required to settle height.

[0025] It takes 12 minutes for the sedimentation height of solids in graduated cylinder d to stop at 14 cm, and 12 minutes for the sedimentation height of solids in graduated cylinder e to stop at 14 cm. It can be seen that the time required for the solids in graduated cylinders d and e to reach the same sedimentation height is the same, indicating that the dehydration performance of gypsum put...

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Abstract

The invention relates to a method for judging dewatering performance of different plasters. The method comprises the following steps of: taking bottom flow grout of different plaster cyclones; adding water into the grout until the densities of the grout are the same; taking the grout with the same volume; putting the grout into graduated transparent containers respectively; uniformly stirring the grout; and judging the dewatering performance of the plasters according to the time needed by the settlement of solid in each container to the same height. Needed time is shorter, settling property is better and the dewatering performance of the plaster is better. The method has the characteristics of simple, convenient and rapid operation, a small number of apparatuses needed for testing and capability of vividly judging the dewatering performance of different plasters and is particularly suitable for the running site of a limestone-plaster wet flue gas desulfurization process in a coal-fired power plant.

Description

technical field [0001] The invention relates to a method for judging the dehydration performance of different gypsums, specifically judging the settling performance by comparing the time required for the underflow slurry solids of different gypsum cyclones with the same volume and density to settle to the same height, so as to further judge the dehydration effect of gypsum The evaluation method is mainly used in the limestone-gypsum wet flue gas desulfurization process of coal-fired power plants. Background technique [0002] my country's energy resources are dominated by coal. In terms of power structure, for a long period of time in the future, there will be a basic pattern of coal-fired units. Large coal consumption and high sulfur content in coal combustion will inevitably lead to SO 2 Emissions have increased dramatically. In 1995, my country's SO 2 The emissions reached 23.7 million tons, becoming the world's largest SO 2 The country with the largest emissions. In...

Claims

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Application Information

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IPC IPC(8): G01N11/12C04B11/02
Inventor 董雪峰吴文龙李东梅
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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