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Method of preparing porous phosphor absorbing ceramic particle from sludge in water supply plant

A water supply plant sludge and ceramsite technology, which is applied in the direction of adsorption of water/sewage treatment, application, ceramic products, etc., can solve the problems of low addition of water supply sludge and low specific surface area, and achieve high use value and large specific surface area , the effect of protecting land resources and water resources

Inactive Publication Date: 2016-03-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ceramsite prepared in these patent applications has problems such as less addition of feedwater sludge and low specific surface area.

Method used

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  • Method of preparing porous phosphor absorbing ceramic particle from sludge in water supply plant
  • Method of preparing porous phosphor absorbing ceramic particle from sludge in water supply plant
  • Method of preparing porous phosphor absorbing ceramic particle from sludge in water supply plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing porous phosphorus-absorbing ceramsite with water supply plant sludge, the specific method is as follows:

[0023] The production process of sludge ceramsite in water supply plant mainly includes four stages of raw material pretreatment, pelleting, firing and cooling.

[0024] (1) Pretreatment

[0025] Naturally air-dry the sludge from the water supply plant, put it into a pulverizer, grind it, and sieve it with a 100-mesh standard sieve (with a sieve size of 0.15mm).

[0026] (2) into a ball

[0027] Mix the sludge and clay from the water supply plant evenly at a mass ratio of 3:1, add them to the ball forming machine to prepare raw meal balls, and spray a solution with a mass fraction of 0.5% sodium silicate as a binder during the ball forming process, sodium silicate The amount of solution used is 10% of the mass of the ball forming material, and the speed of the ball forming machine is controlled to be 40r / min.

[0028] (3) dry

[0029] Aft...

Embodiment 2

[0034] A method for preparing porous phosphorus-absorbing ceramsite with water supply plant sludge, the specific method is as follows:

[0035] The production process of sludge ceramsite in water supply plant mainly includes four stages of raw material pretreatment, pelleting, firing and cooling.

[0036] (1) Pretreatment

[0037] Naturally air-dry the sludge from the water supply plant, put it into a pulverizer, grind it, and sieve it with a 120-mesh standard sieve (with a sieve size of 0.125mm).

[0038] (2) into a ball

[0039] Mix the sludge and clay from the water supply plant evenly at a mass ratio of 4:1, add them to the ball forming machine to prepare raw meal balls, and spray a solution with a mass fraction of 2.0% sodium silicate as a binder during the ball forming process, sodium silicate The amount of the solution is 15% of the mass of the ball forming material, and the speed of the ball forming machine is controlled to be 30r / min.

[0040] (3) dry

[0041] Aft...

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Abstract

The invention relates to a method of preparing porous phosphor absorbing ceramic particle from sludge in water supply plant. The preparation method comprises four phases: raw material preprocessing, balling, sintering, and cooling. The preparation method specifically comprises the following steps: picking raw material balls with a particle size of 6 to 8 mm, drying the raw material balls at a temperature of 105 DEG C for two hours, preheating the raw material balls at a temperature of 300 to 400 DEG C for 20 to 30 minutes, burning the raw material balls at a temperature of 1150 DEG C for 8 to 10 minutes, and cooling to obtain the finished product of ceramic particles. Through controlling the material ratio, rotation speed of granulator, the spraying mode of adhesive, burning time, and burning temperature, ceramic particles with a large specific surface area and strong phosphor absorbing performance can be obtained. The ceramic particles can be used as the filling material of a sewage processing system, and the sludge in a water supply plant is converted into valuable resource.

Description

1. Technical field [0001] The invention relates to a porous phosphorus-absorbing ceramsite, which belongs to the technical field of sludge ceramsite. 2. Technical background [0002] At present, my country's water supply plants mainly purify water sources through a series of processes such as coagulation, sedimentation, filtration and disinfection, remove suspended matter, colloidal substances and other impurities in raw water, and supply purified water to users in the form of pipe network distribution. In the process of drinking water production, a large amount of sludge will be generated, mainly from the sludge discharge water of the sedimentation tank and the flushing wastewater of the backwashing device. In 2014, the annual output of dewatered sludge (with a moisture content of 70%) in urban water plants across the country was close to 22 million tons. The amount of sludge produced will also increase day by day, so the rational disposal of sludge from water supply plant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B33/132C02F1/28
CPCC04B33/131C04B33/1321C04B35/62695C04B35/6316C04B38/009C04B2235/77C04B2235/945C04B2235/96C04B33/00C04B38/0054C04B38/0067C04B38/0074Y02P40/60
Inventor 裴海燕陈洋胡文容孟盼盼邵媛媛李政
Owner SHANDONG UNIV
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