Method for preparing and purifying coal slag-zeolite composite purified ball and experimental device

A composite purification and experimental device technology, applied in chemical instruments and methods, separation methods, combustible gas purification, etc., can solve the problems of low ammonia nitrogen removal effect, reduction of effective surface area, single removal of pollutants, etc., and achieve economical and practical operating costs. , rich pores, easy to make effects

Inactive Publication Date: 2015-04-29
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the strong mechanical properties and impact load resistance of the cinder ball, it can maintain good stability in water treatment. Although it also has a good removal effect on COD, the removal effect on ammonia nitrogen is not high, that is, there is a removal effect. single pollutant problem
In addition, after the adsorption capacity of the cinder balls reaches saturation, the effective surface area of ​​the cinder balls decreases, and gradually loses the adsorption capacity as an adsorption material, so that the cinder balls become "waste" and cannot be used continuously, and cannot be regenerated. reactivation reuse

Method used

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  • Method for preparing and purifying coal slag-zeolite composite purified ball and experimental device
  • Method for preparing and purifying coal slag-zeolite composite purified ball and experimental device
  • Method for preparing and purifying coal slag-zeolite composite purified ball and experimental device

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Experimental program
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Effect test

Embodiment 1

[0034] 1) Cinder pretreatment: grind the cinder to 0.8mm with a pulverizer. Take 200g and put it into a 500mL jar, add 200mL of 7mol / L hydrochloric acid, -1 Shake it on a horizontal shaker for 10 hours, let it stand for 14 hours, pour off the supernatant, wash it repeatedly with water until the pH value is 6, and dry it.

[0035] 2) Zeolite pretreatment: wash the zeolite with clean water and grind it to 0.8mm.

[0036] 3) Preparation of PVA organic adhesive: Weigh 21.0g of polyvinyl alcohol, put it into 300mL of deionized water at 85°C, stir and dissolve, add 3.75g of succinic acid, stir evenly, and cool to room temperature to obtain PVA organic binder.

[0037] 4) Weigh 120g of cinder and 60g of zeolite after the above pretreatment, mix them evenly, put them into a ball forming machine, add PVA organic binder, and make a cinder-zeolite composite purification ball with a diameter of 3cm, dry at 60°C and put Soak it in clean water for 2 weeks, take it out and dry it again to...

Embodiment 2

[0040] Such as figure 1 , 2 , the water tank purification experimental device of the present invention comprises the water inlet 2 and the water outlet 7 that the tank body 1 and its front and rear ends are provided with, and the water distribution weir 3 and the net cage 5 fixed on the support 6 are successively set in the tank body 1, wherein the net cage 5 The interior is filled with cinder-zeolite composite purification balls 5 .

[0041] The above-mentioned water distribution weir 3 is similar to a common cofferdam in water conservancy projects---a water distribution weir, and its purpose is to distribute water evenly along a predetermined channel in a predetermined area. The water distribution weir 3 of the present invention is a uniform water distribution board made of a plastic plate.

[0042] Above-mentioned net cage 6, support 7 are made of metal, as stainless steel wire, aluminum etc.;

[0043]The water body to be purified enters the tank body 1 through the water...

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Abstract

The invention relates to a method for preparing and purifying a coal slag-zeolite composite purified ball and an experimental device. The method comprises the following steps: uniformly mixing pretreated coal slags and zeolites by a mass ratio of 2 to 1; putting into a ball maker; adding a PVA organic adhesive to prepare a coal slag-zeolite composite purified ball; drying and then soaking in fresh water; taking out, drying again, and directly putting in water for use; after use, heating to perform regeneration and reutilization. The coal slag-zeolite composite purified ball can be used repeatedly, has the advantage of preventing secondary pollution of environment and can be used as a filler medium for water purification. The ammonia nitrogen removal rate and COD removal rate on polluted water are respectively as high as 57.2% and 51.2%. The coal slag-zeolite composite purified ball prepared by the method disclosed by the invention is good in mechanical properties, high in impact load resistance, rich in pores so as to provide a relatively large attachment place for microorganisms, wide in raw material source, simple to prepare, economical, practical and low in operating cost.

Description

technical field [0001] The invention belongs to water quality purification technology, in particular to a method for preparing and purifying cinder-zeolite composite purification balls, an experimental device and an application in water quality purification. Background technique [0002] According to the 2012 China Environmental Status Bulletin, the main pollution indicators of surface water bodies such as rivers and lakes in my country are ammonia nitrogen, COD, BOD 5 , total phosphorus, etc. There are various indicators of water pollution exceeding standards, among which ammonia nitrogen and COD in major rivers have the highest exceeding rates. The bulletin pointed out that ammonia nitrogen and COD are the main pollutants discharged in wastewater. In 2012, the total discharge of ammonia nitrogen was 2.536 million tons, and the total discharge of COD was 24.237 million tons. These pollutants enter the surface water body or seep into the groundwater, which seriously threate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01J20/34C02F1/28
CPCB01J20/24B01J20/28019B01J20/3042B01J20/3483B01J2220/4875C02F1/288
Inventor 田伟君俞慧博金鑫周宇航黄汝英刘庆白洁
Owner OCEAN UNIV OF CHINA
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