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Application of high water content sludge in moulded coal preparation

A technology of water sludge and moisture content, which is applied in the field of direct preparation of hollow briquette from urban sewage treatment sludge, can solve the problems of environmental pollution, high investment and operating costs, and difficulty in disposal of sludge, so as to reduce pollution and reduce land resources. Effect

Inactive Publication Date: 2011-09-21
张大康
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems that the sludge produced after the existing urban sewage treatment is not easy to dispose of, occupy land, have high investment and operation costs, and cause environmental pollution, the present invention provides a sludge with a water content of more than 80% in the preparation of briquettes. Application, the specific technical scheme to solve the above problems is as follows:

Method used

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  • Application of high water content sludge in moulded coal preparation
  • Application of high water content sludge in moulded coal preparation

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specific Embodiment approach 1

[0008] Specific Embodiment 1: In this embodiment, high water content sludge (with a water content of more than 80%) after urban sewage treatment is used to mix with coal slime and raw coal, and the amount of raw coal added accounts for 6% to 9% of the total weight of coal slime and raw coal. The high water content sludge, coal slime and raw coal are in a weight ratio of 1:1 to 3, and the high water content sludge, coal slime and raw coal mixed in a weight ratio of 1:1 to 3 are mixed in a mixer Mix evenly, send the uniformly mixed high-moisture sludge, coal slime and raw coal directly into the screw extrusion dehydration briquette forming equipment from the feeding port 2 for dehydration and extrude into hollow or irregular briquettes, and then The extruded briquettes containing sludge are put into the briquette drying equipment and dried to make hollow or irregular briquettes containing sludge. The moisture content of the prepared sludge briquettes is below 5%.

[0009] The a...

specific Embodiment approach 2

[0013] Embodiment 2: The difference between this embodiment and Embodiment 1 is that a deodorizing and sulfur-fixing agent of 1 to 1.5% of the total weight of sludge, coal slime and raw coal is added to high water content sludge, coal slime and raw coal.

specific Embodiment approach 3

[0014] Embodiment 3: The sludge with high water content in this embodiment is mixed with coal slime and raw coal at a weight ratio of 1:2.5. Others are the same as in the first embodiment.

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Abstract

The present invention discloses an application of producing shaped coal by sludge with a moisture content which is more than 80 percent, relating to directly produce shaped coal by sludge. The method includes following steps: mixing the sludge with a high moisture content and coal slurry and rough coal; agitating sludge with a high moisture content and coal slurry and rough coal in the mixing mill, then directly feeding them into helix extrusion dehydration shaped coal moulding apparatus for dehydration and moulding, then putting the shaped coal containing sludge into drier for drying after extrusion moulding; thus obtaining a hollow or irregular shaped coal which contains sludge. The invention reduces the land resource loss due to sludge storage and the environment pollution, and makes the sludge with a high moisture content produced by city sewage treatment become useful.

Description

technical field [0001] The invention relates to the direct preparation of hollow shaped coal by utilizing sludge, in particular, the direct preparation of hollow shaped coal by utilizing urban sewage treatment sludge with a water content of more than 80%. Background technique [0002] At present, the sludge generated after urban sewage treatment in my country mainly has the following disposal methods: one is landfill, which occupies land and will pollute groundwater; The pollution of rivers is serious; the third is incineration after drying, which has high investment and operation costs. Therefore, the treatment and utilization of sludge generated after urban sewage treatment has been a matter of great concern to people. On March 27, 1991, the invention of "briquette with biochemical sludge as binder" published by the State Patent Office (applicant: Guo Weixian, application number: 89105162.7) is based on the use of oily industrial wastewater sludge as briquette. It must be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L5/36C10L5/04C10L5/40
CPCY02E50/30
Inventor 张大康曲鹏仁王丽霞
Owner 张大康