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Hazardous waste sludge or solid waste sludge liquidation and homogenization method

A technology of waste sludge and sludge, applied in the field of solid waste recycling and hazardous waste

Inactive Publication Date: 2017-02-15
曹树梁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The sludge sludge cake, especially the hazardous waste sludge sludge cake, contains a large amount of toxic, carcinogenic and harmful elements, molecules, ions, and substances. The sludge sludge cake is thoroughly dried and ground into powder and fully mixed and reacted with ingredients. There are two main Problems, 1. Sludge drying has high energy consumption and high cost. Generally, the drying cost per ton of sludge is more than 200 yuan; 2. Sludge, especially the dust generated during the drying, crushing, transportation and mixing of hazardous waste sludge, even if expensive It is still difficult to ensure that the workshop environment is up to standard, so that there is no guarantee for stable production. With long-term production, the dust removal and sealing equipment will age, and the production line will face major risks. After practice, it is considered that waste, especially hazardous waste sludge, should not be dry-processed. Crushing and mixing method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put the hazardous waste stainless steel pickling sludge with a water content of 60% in the form of solid mud and put it in a ball mill together with 0.2% sodium tripolyphosphate accounting for the total dry matter of the sludge to be ball-milled into a uniform liquid mud with good fluidity, liquid mud Fully stir and mix with ordinary clay with a fineness of 80 mesh and dry coal powder in a twin-shaft mixer to form a mixed mud with a water content of 24%, and then use an extrusion granulator to granulate the mixed mud into ceramics with a diameter of 12 mm and a length of 22 mm Aggregate green body, the formed wet ceramic aggregate green body is directly put into the rotary kiln, after drying and firing, the firing temperature is 1180 ℃, and it becomes ceramic aggregate. The water absorption rate of the solid part of the ceramic aggregate is 0.4%, and its solid part It is a porcelain material, the chromium content in the ceramic aggregate leach solution is 0.3mg / L, and th...

Embodiment 2

[0022] Add water to the solid waste sewage treatment plant sludge with a water content of 15% in the form of solid hard mud to 45%, and put it in a mixer together with a sodium carbonate water reducing agent accounting for 0.7% of the total dry matter of the sludge to become a uniform flow Sexual liquid mud. Liquid sludge: polluted clay: fly ash﹦46:52:2 (both converted to dry material weight ratio), fully stirred and mixed in the second mixer to become a mixed sludge with a water content of 21%, and the mixed sludge Extruded into ceramic wall and floor tiles, after drying and firing, the firing temperature is 1220°C to become ceramic wall and floor tiles.

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Abstract

The invention discloses a hazardous waste sludge or solid waste sludge liquidation and homogenization method, and belongs to the technical field of hazardous waste and solid waste recycling. The method comprises the following step: putting solid sludge block-shaped or sludge ball-shaped hazardous waste sludge or solid waste sludge with the moisture content of 35 to 70 percent and a water reducing agent accounting for 0.1 to 1 percent of the total amount of a sludge dry substance into a ball grinding machine for ball grinding or into a stirrer for stirring. Under the common action of impact force and grinding pressure of a grinding ball in the ball grinding machine or extrusion force and kneading force of a stirring blade in the stirrer and the water reducing agent, hazardous waste sludge or solid waste solid sludge blocks or balls can be gradually liquefied and homogenized to form uniform liquid mud with high flowability; the liquid mud is favorable for being uniformly mixed with ingredients and an additive to obtain a mixture; the mixture is formed, dried and burnt into a permanently safe ceramic aggregate or ceramic particle or ceramic product and the like.

Description

technical field [0001] The invention relates to a method for liquefying and homogenizing hazardous waste sludge or solid waste sludge in the state of solid mud or mud lumps. The liquefied and homogenized liquid sludge is easy to mix and react with ingredients, and the production is harmless. , useful products, belonging to the technical field of hazardous waste and solid waste recycling. Background technique [0002] At present, the annual production of hazardous waste in my country is about 60 million tons, and the annual production of solid waste is hundreds of millions of tons, which is still increasing year by year. my country's population and industry are concentrated in the east, and the sludge landfills of a large number of solid waste and hazardous waste not only need long-term Management and maintenance will also occupy limited land in eastern my country, and a large number of landfills will also be a major hidden danger to national security in the future. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/13C04B33/135
CPCC04B33/131C04B33/132C04B33/1321C04B33/1352C04B2235/422Y02P40/60
Inventor 不公告发明人
Owner 曹树梁