Unlock instant, AI-driven research and patent intelligence for your innovation.

A new type of sludge ceramsite and its preparation method and application

A kind of sludge ceramsite, a new type of technology, applied in the field of environmental application materials, to achieve the effect of high surface roughness, rich internal pore structure, and conducive to adhesion and growth

Active Publication Date: 2022-04-26
中车环境科技有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the current domestic defects in sludge treatment, and provides a method for sludge resource disposal

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A new type of sludge ceramsite and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] Such as figure 1 Shown, the invention provides a kind of preparation method of novel sludge ceramsite, described method comprises the steps:

[0026] S1: preparation of sludge;

[0027] S2: Mix the sludge, steel slag and diatomite obtained in step S1, and stir evenly to obtain a mixed wet material;

[0028] S3: mechanically granulating the mixed wet material obtained in step S2 to obtain pellet 1;

[0029] S4: Grinding and mixing the pellet 1 obtained in step S3 with calcium silicate powder, preheating and drying to obtain the pellet 2;

[0030] S5: Sintering the grain embryo 2 obtained in step S4 at high temperature;

[0031] S6: Cooling and screening to obtain ceramsite with different specifications;

[0032] S7: Performance appraisal of ceramsite.

[0033] Further, the specific steps of the step S1 are to process the remaining raw sludge produced by the sewage treatment plant through a sludge dehydrator and a sludge dryer to reduce the moisture content of the sl...

Embodiment 1

[0043] (1) Take the remaining raw sludge from the sewage treatment plant with a water content of about 97% to 99%, and after drying and dehydrating, reduce the water content of the sludge to 52%.

[0044] (2) Prepare the dried sludge, diatomite and steel slag according to the ratio, the specific material ratio is: the proportion of sludge is 50%, calcium silicate 10%, diatomite 3%, steel slag 37%. Mix the sludge, diatomite and steel slag, and then stir evenly through the batching and mixing device to obtain the mixed wet material.

[0045] (3) The mixed wet material is granulated by a granulator to obtain a grain embryo 1, and the grain diameter of the grain embryo 1 ranges from 10 mm to 15 mm.

[0046] (4) Fully mix the above-mentioned grain 1 with calcium silicate so that the calcium silicate is attached to the surface of the grain, and put it into the preheating kiln for preheating and drying. The dehydration of the grain embryo is too fast, causing the surface of the cera...

Embodiment 2

[0052] (1) Take the remaining raw sludge from the sewage treatment plant with a water content of about 97% to 99%, and after drying and dehydrating, reduce the water content of the sludge to 55%.

[0053] (2) The dried sludge, diatomite and steel slag are prepared according to the ratio. The specific material ratio is: the proportion of sludge is 60%, calcium silicate 15%, diatomite 5%, and steel slag 20%. Mix the sludge, diatomite and steel slag, and then stir evenly through the batching and mixing device to obtain the mixed wet material.

[0054] (3) The mixed wet material is granulated by a granulator to obtain a grain embryo 1, and the grain diameter of the grain embryo 1 ranges from 10 mm to 15 mm.

[0055] (4) Fully mix the grain embryo 1 obtained above with calcium silicate to make the calcium silicate adhere to the grain embryo surface, put it into a preheating kiln for preheating and drying, and use gradual temperature rise for drying to avoid a sharp rise in temperat...

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
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a new type of sludge ceramsite and its preparation method and application. The method includes the following steps: S1: preparation of sludge; S2: mixing sludge, steel slag and diatomite, stirring evenly to obtain mixed wet material; S3: mechanically granulate the mixed wet material to obtain pellet 1; S4: mix pellet 1 with calcium silicate powder, preheat and dry to obtain pellet 2; S5: sinter pellet 2 at high temperature; S6 : Cooling and screening to obtain ceramsite with different specifications; S7: Identification of ceramsite performance. The present invention uses sewage plant sludge as raw material, supplemented with steel slag, calcium silicate and other materials, after fully stirring and mixing, it undergoes mechanical granulation and high-temperature sintering to produce a new type of sludge pottery with large void structure and strong adsorption performance. Granules, can be used as biological aerated filter filler. The preparation of sludge into ceramsite can realize the safe and harmless disposal of sludge, and achieve the harmless and resource utilization of solid waste, which has very important guiding significance for sludge disposal.

Description

technical field [0001] The invention belongs to the field of environmental application materials, and in particular relates to a novel sludge ceramsite and its preparation method and application. Background technique [0002] With the rapid development of my country's social economy and the rapid increase of urban population, the increase in the amount of urban sewage treatment has also brought about a more serious problem of sludge treatment. Due to the high moisture content and complex composition of sewage sludge, a large number of organic pollutants are easy to rot and smell, which seriously affects the environmental sanitation. At present, domestic sludge treatment methods mainly include landfill, composting and incineration. Although these methods can accommodate a large amount of sludge, they all have certain defects and deficiencies. For example, landfilling will occupy a large amount of land resources, and composting will It will lead to the diffusion of pollutants...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/132C04B33/138C04B33/13C04B38/00C02F3/10
CPCC04B33/1321C04B33/138C04B33/13C04B33/1328C04B38/009C02F3/104C02F3/107C04B2235/3418C04B2235/3454C04B2235/6562C04B2235/6567C04B2235/96Y02P40/60Y02W10/10
Inventor 王琛李旻陈红瑞罗丽
Owner 中车环境科技有限公司