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A kind of sludge-coal gangue co-landfilling process

A technology of coal gangue and technology, applied in the field of sludge-coal gangue co-landfill technology, can solve the problems of occupying land and affecting the ecological environment, and achieve the effects of promoting contribution, improving environmental quality, and accelerating drying

Inactive Publication Date: 2017-01-11
吉晋兰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the only way to dispose of coal gangue in the country is to store and dispose of it. A large number of piles of coal gangue not only occupies land, but more seriously affects the ecological environment.

Method used

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  • A kind of sludge-coal gangue co-landfilling process
  • A kind of sludge-coal gangue co-landfilling process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A sludge-coal gangue co-filling process test was carried out at a dewatered sludge landfill in Jincheng City, Shanxi Province.

[0026] A kind of dewatered sludge-coal gangue landfill process comprises the following steps:

[0027] Step 1: Pour dewatered sludge with a water content of 85% from Jincheng Sewage Treatment Plant into the mixer, and then add a desiccant to the mixer. The desiccant is a mixture of fly ash and quicklime. When adding, follow the Dewatered sludge: fly ash: quicklime=80:15:5 volume ratio, turn on the mixer, adjust the speed of the mixer to medium speed, 60-100r / min, stir for 20min, and put the stirred dewatered sludge mixture from the mixer Unloaded in the middle, and dried naturally for 30 minutes, so that the moisture content of the dewatered sludge was reduced to 70%.

[0028] Step 2: The coal gangue pulled by Shanxi Jincheng Anthracite Mining Group Co., Ltd. is crushed by a crusher and screened, so that the coal gangue becomes uniform partic...

Embodiment 2

[0032] A sludge-coal gangue co-filling process test was carried out at a dewatered sludge landfill in Jincheng City, Shanxi Province.

[0033] A kind of dewatered sludge-coal gangue landfill process comprises the following steps:

[0034] Step 1: Pour the dewatered sludge with a water content of 75% from Jincheng Sewage Treatment Plant into the mixer, and then add a desiccant to the mixer. The desiccant is a mixture of fly ash and quicklime. When adding, follow the Dewatered sludge: fly ash: quicklime=80:15:5 volume ratio, turn on the mixer, adjust the speed of the mixer to medium speed, 60-100r / min, stir for 20min, and put the stirred dewatered sludge mixture from the mixer Unloaded in the middle, and dried naturally for 30 minutes, so that the moisture content of the dewatered sludge was reduced to 65%.

[0035] Step 2: The coal gangue pulled by Shanxi Jincheng Anthracite Mining Group Co., Ltd. is crushed by a crusher and screened, so that the coal gangue becomes uniform pa...

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Abstract

The invention relates to a process for landfill of sludge and coal gangue together. The process comprises the following steps: (1) performing half-dry pretreatment on dewatered sludge; (2) performing pre-crushing treatment on coal gangue, and screening; (3) performing landfill of the sludge and the coal gangue which are subjected to pretreatment together. During landfill, the sludge and the coal gangue are laid at intervals by adopting a layered laying method, and the sludge in the half-dry state is supported under the distance separation action of the coal gangue, so that time and space for secondary drying of the sludge in a coal gangue field are provided. Aiming at plains and valleys, different sludge landfill processes such as 'stacked on the plains' or 'valley type' can be adopted respectively. According to the process, the landfill of sludge and coal gangue can be taken into consideration comprehensively, and not only is the problem of sludge landfill solved, but also the effective use of the coal gangue field is promoted; through adoption of the process, the environmental quality of a coal-producing area is improved, contribution to promotion of social and economic sustainable development is made, and the implementation operability is high.

Description

technical field [0001] The invention belongs to the field of environmental pollution control, and in particular relates to a sludge-coal gangue co-landfilling process. Background technique [0002] With the continuous development of the sewage treatment industry, the sludge generated by the sewage treatment plant is increasing. The ultimate outlet of sludge is a huge problem currently faced by sewage treatment plants. If the sludge cannot be properly disposed of, the harm to the environment is enormous. Since the water content of sludge from conventional sewage treatment plants reaches about 80%, it will be difficult to roll after entering the ordinary domestic waste landfill, so the landfill is not willing to accept the dewatered sludge from sewage plants. [0003] Coal gangue is solid waste discharged during the coal mining process and coal washing process in coal-producing areas. It is a black-gray rock with low carbon content, sulfide content, and harder than coal that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00C02F11/12
Inventor 吉晋兰张弛段斌
Owner 吉晋兰
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