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Method for improving PAC (Poly Aluminum Chloride) filter pressing performance

A performance and raw material technology, applied in the field of improving the performance of PAC filter press, can solve the problems that affect the turnover rate of storage facilities and the yield of finished products, and it is difficult to press filter through plate and frame filter press equipment, so as to improve product quality and improve filter press Efficiency and easy operation

Inactive Publication Date: 2014-06-04
CHANGZHOU WUJIN YOUBANG WATER PURIFICATION MATERIALS
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the diversification of PAC production raw materials, a variety of different raw material combination processes have been produced. In the end, the PAC reaction liquid is often difficult to pass through the plate and frame filter press equipment, and can only be separated by natural sedimentation, which seriously affects the turnover of storage facilities. rate and finished product yield
[0003] In order to improve the pressure filtration performance of PAC, on the basis of in-depth research on the properties of raw materials and production technology, the present invention proposes a method for improving the performance of PAC filtration by controlling the ratio of raw materials and production technology. This method is simple and feasible, and has relatively Strong practical value, which has never been seen in previous public patents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 59t of aluminum-containing hydrochloric acid (A1203%=5.9%, HCl%=0.87%, S042-%=1.22%) in a 100m3 reactor, turn on the stirring, and add 10t of hydrochloric acid (HCl%=31.5%), sulfuric acid 0.8t ( H2S04%=70.8%), water 16t, after stirring evenly, add calcium aluminate powder 13.8t (A1203%=50.13%, CaO%=32.47%), heat up to 90°C and start timing, after stirring for 1.5 hours, sample and cool to After 80°C, use medium-speed quantitative filter paper for suction filtration. When the vacuum degree is 0.035MPa to 0.040MPa, the suction filtration time of 100mL PAC product liquid is 2min.

Embodiment 2

[0016] Add 31t of hydrochloric acid (HCl%=32.6%) into a 100m3 reactor, add 39t of aluminum profile processing waste residue (A1203%=10.56%) under stirring, stir for 2 hours until the waste residue is completely dissolved, then add 10t of aluminum brine (A1203%=6.5%) %, HCl%=0.5%, S042-%=5.8%), after stirring evenly, add 10.6t of calcium aluminate powder, start timing when the temperature rises to 90°C, stir and react for 1.5 hours, take samples and cool to 60°C, and use medium speed Quantitative filter paper suction filtration, when the vacuum degree is -0.035MPa~-0.040MPa, the suction filtration time of 100mL PAC finished liquid is 6min.

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Abstract

The invention discloses a method for improving PAC (Poly Aluminum Chloride) filter pressing performance. According to the method, the PAC filter pressing performance is improved through regulating and controlling a raw material ratio and a production process. According to the method, through the content of a sulfate radical in a production raw material to be 0.5-1.5 percent, the consumption of calcium aluminate does not exceed 17 percent of the total weight of the raw material, the reaction time is 1-2 hours, the filter pressing temperature is 50-90 DEG C, the filter pressing performance of a PAC liquid which is difficult to press-filter is improved, and the filter pressing efficiency of the PAC liquid which is capable of filter-pressing is increased. Based on an original PAC production process, a production procedure is not increased, thus the method is simple and easy to operate, and strong in popularization and application values.

Description

technical field [0001] The invention relates to a method for improving the performance of PAC filter press, in particular to a method for improving the performance of PAC filter press by controlling the production ratio of raw materials and production process conditions. Background technique: [0002] PAC is a commonly used agent in the treatment of industrial sewage, industrial water and domestic sewage. At present, most PAC manufacturers in my country use calcium aluminate acid-dissolving one-step method to produce PAC, and the raw materials used are mostly by-products or wastes of upstream industrial enterprises. Therefore, the final reaction solution contains more or less a certain amount of water-insoluble residues. , It needs to be settled by natural sedimentation, or adding a sedimentation agent to accelerate the sedimentation, or press filtration equipment to remove it. Plate and frame filter press is used by most water purifier manufacturers because of its high filt...

Claims

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Application Information

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IPC IPC(8): C01F7/56
Inventor 赵志萍王桂玉周斌
Owner CHANGZHOU WUJIN YOUBANG WATER PURIFICATION MATERIALS
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