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Preparation process of sludge electrical coal

A technology for electric coal and sludge, applied in sludge treatment, water/sludge/sewage treatment, petroleum industry, etc., can solve the problems of pathogen diffusion, heavy metal pollution, groundwater pollution, uneconomical energy consumption, etc. The effect of low moisture content requirement, lower processing cost and improved production efficiency

Inactive Publication Date: 2013-06-12
GUANGXI LIUZHOU POWER GENERATION COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, composting and landfilling may infiltrate the land and pollute the groundwater, both of which have the risk of pathogenic bacteria spreading and heavy metal pollution; the cost of direct sludge incineration equipment is too high, resources are scarce, utilization efficiency is low, and energy consumption is also extremely high. Uneconomical; improper incineration will generate dioxins and cause environmental pollution

Method used

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  • Preparation process of sludge electrical coal

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Effect test

Embodiment 1

[0025] Embodiment 1: a kind of preparation process of sludge electric coal, comprises the following steps:

[0026] (1) Put the dewatered sludge into the hopper, add the dehydrating agent, use the twin-shaft pulverizer to pulverize, stir and mix, and spray the deodorant - G218 Bacillus natto to eliminate the odor during the process.

[0027] (2) Add combustion aids, biomass auxiliary fuel and raw coal to the sludge treated in step (1), transport it to a mixing crusher for pulverization and mix to obtain sludge thermal coal.

[0028] The dehydrating agent is red mud, sodium salt, bentonite and organic flocculant; the red mud is potassium aluminum sulfate dodecahydrate (ie alum), the sodium salt is sodium carbonate, and the bentonite is Activated clay, the organic flocculant is polyacrylamide.

[0029] The combustion aids are strong organic oxidants, magnesium salts, rare earths and sodium humate; the strong organic oxidants are potassium permanganate, the magnesium salts are m...

Embodiment 2- Embodiment 7

[0032] Embodiment 2-Embodiment 7: A preparation process of sludge electric coal, its specific steps are the same as in Embodiment 1, and the weight ratio of each component is shown in Attached Table 1.

[0033] Schedule 1

[0034]

[0035] The dewatered sludge described in this embodiment refers to sludge with a moisture content lower than or equal to 60% and a calorific value higher than 2000 kcal; the raw coal has a moisture content of 8-10% and a calorific value of 5000-5500 kcal; The chimney plant ash has a moisture content of 1-2%, a calorific value of 1000-1300 kcal, and wood chaff and chaff with a moisture content of 4-7%, and a calorific value of 6000-7000 kcal.

[0036] Each embodiment of the present invention can be prepared to reach the power plant coal standard with a calorific value of 4500-4700 kcal, a moisture content of less than 9%, an ash content of 40-60%, a volatile matter of 15-30%, and a sludge power plant with a sulfur content of less than 3%. coal. ...

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Abstract

The invention relates to a preparation process of sludge electrical coal. The preparation process comprises the following steps of: (1) stirring and mixing dewatered sludge and water decomposing agents, and spraying a deodorant during the process to remove odor; and (2) crushing the dewatered sludge after treatment in the step (1), combustion-supporting additives, a biomass auxiliary fuel and raw coal powder, and then mixing to obtain the sludge electrical coal, wherein the water decomposing agents are of red mud, a sodium salt, bentonite and an organic flocculant; the combustion-supporting additives are of an organic strong oxidant, a magnesium salt, rare earth and sodium humate; the deodorant is of a Bacillus natto preparation; and the sludge electrical coal comprises the following components in percentage by weight: 20-30% of dewatered sludge, 1-5% of water decomposing agents, 1-5% of combustion-supporting additives, 30-40% of biomass auxiliary fuel and 30-40% of raw coal. The whole set of the method disclosed by the invention has the advantages of simple process, low cost and low requirement for water content in the sludge, the sludge electrical coal is prepared by using the sludge, the caloric value of the sludge is fully utilized, and the resource utilization purpose is achieved.

Description

technical field [0001] The invention relates to a preparation process for preparing coal for power generation by utilizing urban sludge, realizes resource utilization of urban sludge, and is suitable for sludge treatment industry and coal power generation industry. Background technique [0002] Municipal sludge is a by-product of sewage treatment. Municipal sludge has complex components, high content of organic matter, and contains toxic substances such as heavy metals, parasites, and germs, and the problem of odor is very prominent. The massive generation of urban sludge has caused increasingly severe secondary pollution and has become a bottleneck in the urban sewage treatment industry. [0003] At present, the usual methods of urban sludge treatment at home and abroad are mainly composting, landfilling and incineration. However, composting and landfilling may infiltrate the land and pollute the groundwater, both of which have the risk of pathogenic bacteria spreading an...

Claims

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Application Information

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IPC IPC(8): C10L5/46C02F11/00
CPCY02E50/30Y02E50/10
Inventor 唐军生麦亚强吴强王强陈显辉李军安叶佳海
Owner GUANGXI LIUZHOU POWER GENERATION COMPANY
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