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Method for pressing steaming-free and baking-free wall body block from dehydrated sludge in sewage treatment plant

A technology for sewage treatment plants and dewatered sludge, which is applied in the field of dewatered sludge in sewage treatment plants to suppress non-steaming and non-burning wall blocks to achieve the effects of protecting cultivated land, protecting health, and eliminating the hazards of the ecological environment

Inactive Publication Date: 2018-02-23
宁波纯恒固废科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for pressing dewatered sludge from a sewage treatment plant to suppress non-steaming and non-burning wall blocks. Utilizing the problem, this method not only does not cause environmental pollution, but also has low cost. The unfired bricks obtained have early strength, high strength, excellent compressive strength, and no radioactivity. At the same time, wall blocks with various specifications can be produced. It can also be manufactured into building components for various purposes

Method used

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  • Method for pressing steaming-free and baking-free wall body block from dehydrated sludge in sewage treatment plant
  • Method for pressing steaming-free and baking-free wall body block from dehydrated sludge in sewage treatment plant
  • Method for pressing steaming-free and baking-free wall body block from dehydrated sludge in sewage treatment plant

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for pressing non-steaming and non-burning wall blocks with dewatered sludge in a sewage treatment plant, including sludge dehydration and drying modification, mixing wheel milling, mixture digestion, digested material mixed and repeated wheel milling, hydroforming, product blank curing, Specifically include the following steps:

[0035] 1) Sludge dehydration and drying modification: dehydrate the dewatered sludge from urban sewage treatment plants to a moisture content of 78%. Under the control of an automatic meter, take 92.25 parts of dewatered sludge, 6 parts of sea shell ash, sulfuric acid 1.5 parts of ferrous iron and 0.25 parts of calcium hydroxide are sent to the screw sludge dryer by sludge pump and powder pump, mixed evenly, and then dehydrated and dried to make the dehydration rate of the sludge reach more than 90%. Sexual sludge;

[0036] 2) Mixing wheel grinding: under the control of the automatic meter, take 35 parts of modified sludge, 7 parts of...

Embodiment 2

[0045] A method for pressing non-steaming and non-burning wall blocks with dewatered sludge in a sewage treatment plant, including sludge dehydration and drying modification, mixing wheel milling, mixture digestion, digested material mixed and repeated wheel milling, hydroforming, product blank curing, Specifically include the following steps:

[0046] 1) Sludge dehydration and drying modification: dehydrate the dewatered sludge from urban sewage treatment plants to a moisture content of 78%. Under the control of an automatic meter, take 92.25 parts of dewatered sludge, 6 parts of sea shell ash, sulfuric acid 1.5 parts of ferrous iron and 0.25 parts of calcium hydroxide are sent to the screw sludge dryer by sludge pump and powder pump, mixed evenly, and then dehydrated and dried to make the dehydration rate of the sludge reach more than 90%. Sexual sludge;

[0047] 2) Mixing wheel grinding: under the control of the automatic meter, take 37 parts of modified sludge, 8 parts of...

Embodiment 3

[0056] A method for pressing non-steaming and non-burning wall blocks with dewatered sludge in a sewage treatment plant, including sludge dehydration and drying modification, mixing wheel milling, mixture digestion, digested material mixed and repeated wheel milling, hydroforming, product blank curing, Specifically include the following steps:

[0057] 1) Sludge dehydration and drying modification: dehydrate the dewatered sludge from urban sewage treatment plants to a moisture content of 78%. Under the control of an automatic meter, take 92.25 parts of dewatered sludge, 6 parts of sea shell ash, sulfuric acid 1.5 parts of ferrous iron and 0.25 parts of calcium hydroxide are sent to the screw sludge dryer by sludge pump and powder pump, mixed evenly, and then dehydrated and dried to make the dehydration rate of the sludge reach more than 90%. Sexual sludge;

[0058] 2) Mixing wheel grinding: under the control of the automatic meter, take 39 parts of modified sludge, 8.5 parts ...

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Abstract

The invention discloses a method for pressing a steaming-free and baking-free wall body block from dehydrated sludge in a sewage treatment plant. The method specifically comprises the following steps:dehydrating sludge of the sewage treatment plant, modifying the dehydrated sludge by virtue of seashell dust, ferrous sulfate and calcium hydroxide, so as to obtain modified sludge; mixing the modified sludge, the seashell dust, calcium sulfate, silica fume, slag charge, an F14 liquid activating agent and water, so as to obtain a mixture; digesting the mixture, so as to obtain a digested material; mixing the digested material, a solidifying agent and a YW-type surfactant, so as to obtain a blank preparing material; preparing a product workblank from the blank preparing material by virtue of apunching system; and carrying out pre-maintenance on the product workblank, and carrying out thermal air circulating reaction maintenance on the product workblank, so as to obtain the wall body block. The method has the beneficial effects that the problems in the effective treatment and resource utilization of the dehydrated sludge and industrial waste residue or engineering muck in the sewage treatment plant are solved, the cost is low, an obtained baking-free brick has excellent compressive strength, has no radioactivity, can be used for producing multiple specifications of wall body blocksand can be manufactured into building components for various uses.

Description

technical field [0001] The invention relates to a wall block made of sludge, in particular to a method for pressing a non-steaming and non-burning wall block with dewatered sludge in a sewage treatment plant. Background technique [0002] In the process of collecting and treating urban sewage, a large amount of sludge will inevitably be produced (according to statistics, the amount of dry sludge produced globally is 175 million tons per year). China is developing, the population is increasing, people's environmental awareness is strengthening and the environment The improvement of quality requirements makes more and more waste water need to be treated. By 2015, the discharge of urban sludge will reach more than 47.8 million tons t / a (dry matter), and the sediment, fiber, animal and plant residues and organic matter, heavy metals, Sludge is a thick substance formed by germs, viruses, insect eggs, and colloids. If such a huge amount of urban sludge is not properly treated, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00
CPCC04B30/00C04B2201/20C04B2201/50C04B18/0418C04B14/28C04B22/143C04B18/146C04B18/141C04B18/144C04B18/16C04B2103/0068C04B22/149C04B22/064C04B40/0263
Inventor 卢开裕虞克夫张慧迪
Owner 宁波纯恒固废科技有限公司
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