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Process for manufacturing water treatment ceramsite filter by waste gypsum generated in acesulfame potassium production

A technology of ceramsite filter material and waste gypsum, which is applied in applications, ceramic products, household appliances, etc., can solve the problems of low cost and environmental pollution of waste gypsum, and achieve the effect of large porosity, easy to hang film, and solve environmental pollution.

Active Publication Date: 2010-12-15
南通宏信化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of waste gypsum manufacturing water treatment device with excellent characteristics and low cost, which can simultaneously solve the environmental pollution problem of waste gypsum in acesulfame production. The process of ceramsite filter material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The process of using waste gypsum in the production of acesulfame to manufacture water treatment ceramsite filter material comprises the following steps:

[0019] a) Pretreatment: Mix the waste gypsum in the production of acesulfame-K with water, stir for 30 minutes, and dissolve the soluble impurities, then separate it by precipitation or centrifuge, and discharge the solution to the waste water treatment station for treatment. The temperature of the gypsum slurry is 150°C Baking and dehydrating to a moisture content of less than 5%; drying or air-drying the biological sludge to a moisture content of less than 10%; pulverizing and grinding the fly ash and clay to a size greater than 325 mesh;

[0020] b), mixing homogeneously: get the above-mentioned pretreated waste gypsum mixed with fly ash and biological sludge as base material, wherein the mass percentage of waste gypsum is 40%, and the mass percentage of fly ash is 20%. The mass percent of sludge is 20%, mixes eve...

Embodiment 2

[0025] The process of using waste gypsum in the production of acesulfame to manufacture water treatment ceramsite filter material comprises the following steps:

[0026] a) Pretreatment: Mix the waste gypsum in the production of acesulfame-K with water, stir for 30 minutes, and dissolve the soluble impurities, then separate it by precipitation or centrifuge, and discharge the solution to the waste water treatment station for treatment. The temperature of the gypsum slurry is 150°C Baking and dehydrating to a moisture content of less than 5%; drying or air-drying the biological sludge to a moisture content of less than 10%; pulverizing and grinding the fly ash and clay to a size greater than 325 mesh;

[0027] b), mixing homogeneously: get the above-mentioned pretreated waste gypsum mixed with fly ash and biological sludge as base material, wherein the mass percentage of waste gypsum is 50%, and the mass percentage of fly ash is 35%. The mass percent of sludge is 5%, mixes even...

Embodiment 3

[0032] The process of using waste gypsum in the production of acesulfame to manufacture water treatment ceramsite filter material comprises the following steps:

[0033] a) Pretreatment: Mix the waste gypsum in the production of acesulfame-K with water, stir for 30 minutes, and dissolve the soluble impurities, then separate it by precipitation or centrifuge, and discharge the solution to the waste water treatment station for treatment. The temperature of the gypsum slurry is 150°C Baking and dehydrating to a moisture content of less than 5%; drying or air-drying the biological sludge to a moisture content of less than 10%; pulverizing and grinding the fly ash and clay to a size greater than 325 mesh;

[0034] b), mixing homogeneously: get the above-mentioned pretreated waste gypsum mixed with fly ash and biological sludge as base material, wherein the mass percentage of waste gypsum is 50%, and the mass percentage of fly ash is 30%. The mass percentage of sludge is 8%, after a...

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Abstract

The invention relates to a process for manufacturing a water treatment ceramsite filter by waste gypsum generated in acesulfame potassium production, which is characterized by comprising the following steps: a) pre-treatment: cleaning, drying and dewatering the waste gypsum generated in the acesulfame potassium production; b) mixing and homogenizing: mixing the treated waste gypsum with flyash and biological sludge to serve as a base stock, wherein base stock comprises 40-60% of waste gypsum by mass, 20-35% of flyash by mass and 5-20% of biological sludge by mass; and adding 8-15% of clay by mass and 1-12% of pore-forming material by mass, and evenly mixing; c) pelletizing; d) expanding; and e) screening: crushing the expanded product into the ceramic product with the particle size of 3-15mm, namely obtaining the product in the invention. The ceramic filter obtained in the invention can be suitable for enterprises needing water treatment like sewage treatment plants and the like.

Description

technical field [0001] The invention relates to the field of water treatment engineering, in particular to a production process for manufacturing water treatment ceramsite filter material. Background technique [0002] At present, ordinary fast filter tanks and biological aerated filters are widely used in domestic water treatment, and the filter material is the key and core component of the process, which has a direct impact on its treatment efficiency. At this stage, the commonly used filter materials mainly include quartz sand, slag, zeolite, coke, lightweight ceramsite and plastic particles. Among them, the large specific gravity particle filter material generally has small particle size, small specific surface area and porosity, so the biomass of the filter material layer is small, the resistance of the filter material layer is large, and the operating load is not easy to be too high; although the lightweight plastic filter material has A series of good characteristics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00B09B3/00
Inventor 薛张辉张庆粉孙国清陈颖陈小萍
Owner 南通宏信化工有限公司
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