Method for preparing baking-free ecological bricks from chemical and residual sludge as well as prepared product

A technology of surplus sludge and ecological bricks, which is applied in the direction of ceramic products, other household utensils, household utensils, etc., can solve the problems of complex composition and high moisture content of chemical surplus sludge, and achieve large processing capacity, high strength and operability strong effect
CN105601313AInactive Publication Date: 2016-05-25NJTECH ENVIRONMENT TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NJTECH ENVIRONMENT TECH CO LTD
Publication Date
2016-05-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing baking-free ecological bricks from chemical and residual sludge as well as a prepared product. Residual sludge incineration ash and metakaolin are mixed according to a certain proportion with uniformly stirring, a mixture is obtained, sodium hydroxide, sodium silicate and water are added, a mixer is used for stirring and fully mixing, and slurry is obtained; the mixed slurry is extruded and injected into a cuboid test piece of a certain specification, and the test piece is sent to a drying oven for maintenance; the test piece is taken out for demoulding, maintenance is continuously carried out for 7 days at 20-80 DEG C, and residual sludge based baking-free ecological bricks are prepared. The ecological bricks are light and porous with large strength, and construction control is convenient. The bricks are hopeful to be used for river channels in chemical industry park, ecologic slope protection of landscape rivers and ecological paving bricks in park, and the like.
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Description

technical field

[0001] The invention belongs to the field of resource disposal of industrial waste, and relates to a method for preparing non-burning ecological bricks from residual chemical sludge and the prepared products. Background technique

[0002] Chemical surplus sludge is the solid waste produced in the process of chemical wastewater treatment in sewage treatment plants. The residual chemical sludge has high water content and complex composition, including various organic poisons, heavy metals and pathogenic microorganisms. According to the "Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Waste", the residual chemical sludge must be properly treated, especially the heavy metals in the sludge must be stabilized before being discharged. At present, there are hundreds of chemical industry parks and hundreds of thousands of chemical enterprises in my country, which produce a huge amount of chemical surplus sludge ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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