Method for brickmaking by comprehensive utilization of desiccated sludge

A technology for making bricks and sludge from sludge, which is applied in the direction of dehydration/drying/concentrated sludge treatment, application, household appliances, etc. It can solve the problems of impact strength, poor effect, and easy to crisp, so as to save energy and increase its own heat , Excellent thermal performance

Active Publication Date: 2012-03-21
南京鑫翔环保产业有限公司
View PDF8 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In the prior art, the sludge with high water content is directly blended, or the dried sludge is mixed according to the mass percentage of 10-15%, and then mixed to make bricks, but the effect is poor, and it cannot be stirred evenly, which also limits The amount of sludge added, after the test, it was found that the bricks made will agglomerate (that is, due to uneven mixing and different material properties, plaques will be formed on the surface or inside of the brick after sintering), which affects the strength and is easy to crisp. Sludge does not reach the stated 10-15% mass percentage

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
  • Method for brickmaking by comprehensive utilization of desiccated sludge
  • Method for brickmaking by comprehensive utilization of desiccated sludge
  • Method for brickmaking by comprehensive utilization of desiccated sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Drying sludge: Dry the municipal sludge with a moisture content of 80-85% through a drying system to obtain dried sludge with a moisture content of 10%-25% and a loss on ignition of 26%-29% .

[0061] Ingredients: According to the ratio of dried urban sludge: coal gangue = 30:70, the raw materials are mixed, and the particle size of the crushed material is required to be ≤5cm, the particle size of the hammered material is required to be ≤1cm, and the particle size of the sieve ≥6 mesh). Then enter the brick making process according to the ordinary brick making process.

[0062] Forming: control extrusion pressure ≥ 3.5MPa, vacuum degree ≥ 98%.

[0063] Sintering: Sintering for 3 hours under the condition of controlling the maximum temperature of 1080 degrees to obtain microporous porous bricks, such as Figure 10 shown.

[0064] After leaving the kiln, it is sorted and stored in the cargo yard. The outer size is qualified, the brick strength is ≥ MU10 and the block ...

Embodiment 2

[0066] The specific process steps are the same as in Example 1, except that the ratio of raw materials is as follows: dried municipal sludge: shale: internal fuel = 35:60:5.

[0067] The sintering is controlled under the condition that the maximum temperature is 1050 degrees, and sintering is performed for 2.5 hours.

Embodiment 3

[0069] Concrete process step is identical with embodiment 1, and difference is that raw material proportioning is as follows: sludge after drying: municipal sludge slag after burning: coal gangue=20: 30: 50

[0070] Under the condition of sintering control with a maximum temperature of 1100 degrees, sintering for 1.5 hours to obtain a microporous porous block, such as Figure 11 shown.

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

No PUM Login to view more

Abstract

The invention discloses a method for brickmaking by comprehensive utilization of desiccated sludge; sludge is desiccated and is used as a raw material for brickmaking; the method comprises the following steps: firstly transporting municipal sludge with water content of 80-85% to a sludge warehouse for sealing storage, grabbing the sludge in the sludge warehouse by controlling a grab bucket traveling boom through a PLC system, transferring the sludge to a feed hopper of a sludge feeding device, adding a curing agent into the feed hopper, fully stirring, transporting the sludge to a desiccationchamber of a desiccation device, performing desiccation in the desiccation chamber by solar energy and waste heat of a tunnel furnace so as to obtain sludge which is used as a material for brickmaking. The invention performs desiccation by using brickkiln waste heat and solar energy; the physical heat at a brick-baking tail part of the tunnel furnace is made full use of, which increases self heat, and saves a lot of energy; sludge is added into various raw materials, and no clay is used; with respect to baked brick production by using municipal sludge with a high mixing amount, the highest mixing amount of municipal sludge is up to 50%.

Description

technical field [0001] The invention belongs to the harmless treatment and resource utilization technology of urban sludge, in particular to a method for comprehensively utilizing dried sludge to make bricks. Background technique [0002] Municipal sludge refers to the solid waste generated during the treatment of urban domestic sewage and industrial wastewater, and is a regular product of urban sewage treatment plants. This sludge has a high water content, is perishable, has a strong odor, and contains toxic substances such as dioxins, bacteria, parasite eggs, and heavy metals. Therefore, it is necessary to carry out harmless treatment and reuse of sludge, and the drying of sludge is a necessary step in sludge treatment. At present, the drying methods mainly include: traditional thermal sludge drying and solar sludge drying. [0003] Traditional thermal sludge drying refers to the use of sludge thermal drying integrated equipment to dry sludge. According to the contact m...

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 Applications(China)
IPC IPC(8): C04B35/622C04B33/00C04B33/132C04B38/00C02F11/14
CPCY02P40/60Y02W10/37
Inventor 王军仲黎明胡文成
Owner 南京鑫翔环保产业有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap