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Method for devulcanization by burning power plant fire coal mixed with dried sludge

A drying sludge and coal-fired technology, applied in the direction of fuel, solid fuel, petroleum industry, etc., can solve the problems of unfavorable popularization and application, high equipment cost, complicated process, etc., and achieve great social and economic benefits and equipment cost The effect of low cost and simple process

Inactive Publication Date: 2012-09-19
DONGGUAN NINE DRAGONS PAPER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Yet the technology of this invention is complicated, and equipment cost is high, is unfavorable for general popularization and application
In addition, in addition to the use of papermaking sludge, this process also needs to use lye-containing wastewater for desulfurization. The desulfurized wastewater needs to be treated twice. If it is not handled carefully, it will easily cause secondary pollution.

Method used

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  • Method for devulcanization by burning power plant fire coal mixed with dried sludge
  • Method for devulcanization by burning power plant fire coal mixed with dried sludge

Examples

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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a method for combustion and desulfurization of coal-fired and dried sludge in a power plant in this embodiment includes the following processing steps: the sludge with a moisture content of 90% produced by waste paper and papermaking sewage is injected into a box-type diaphragm filter press It is made by extrusion dehydration, and the water content of the sludge is reduced to 50% under the pressure of 1.0MPa feed material, and the water content of the sludge is reduced to 40% under the secondary mechanical pressure of 2MPa of the equipment; Dried sludge is sludge produced from waste paper and papermaking sewage, its water content is 40%, and the mass percentage content of calcium ions and magnesium ions is 5%. The mass ratio of dried sludge and power plant coal is 1: Mix thoroughly at a ratio of 6; use a coal mill to grind the power plant coal mixed with dried sludge to 80 mesh, and it is in powder form; put the mixed powder of the ground drie...

Embodiment 2

[0035] Such as figure 1 As shown, a method for combustion and desulfurization of coal-fired and dried sludge in a power plant in this embodiment includes the following processing steps: the sludge with a moisture content of 90% produced by waste paper and papermaking sewage is injected into a box-type diaphragm filter press It is made by extrusion dehydration, and the water content of the sludge is reduced to 47% under the pressure of 1.25MPa feed material, and the water content of the sludge is reduced to 38% under the secondary mechanical pressure of 2.5MPa of the equipment; The dried sludge is the sludge produced by waste paper and papermaking sewage, its water content is 38%, and the mass percentage content of calcium ions and magnesium ions is not less than 5%. The mass ratio of dried sludge and power plant coal is The ratio of 1:6.5 is fully mixed; the power plant coal mixed with dried sludge is ground to 100 mesh with a coal mill, and it is in powder form; the mixed pow...

Embodiment 3

[0037] Such as figure 1 As shown, a method for combustion and desulfurization of coal-fired and dried sludge in a power plant in this embodiment includes the following processing steps: the sludge with a moisture content of 90% produced by waste paper and papermaking sewage is injected into a box-type diaphragm filter press It is made by extrusion and dehydration. Under the pressure of 1.5MPa feed material, the moisture content of the sludge is reduced to below 45%. Under the secondary mechanical pressure of the equipment 3MPa, the sludge is dehydrated for the second time, and the moisture content of the sludge is reduced to below 35%. The obtained dried sludge is the sludge produced by waste paper and papermaking sewage, its water content is 35%, and the mass percentage content of calcium ions and magnesium ions is not less than 5%; Fully mix at a ratio of 1:7; use a coal mill to grind the power plant coal mixed with dried sludge to 130 mesh, and it is in powder form; mix the...

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Abstract

The invention relates to the technical field of environment-friendly devulcanization processes, in particular to a method for devulcanization by burning power plant fire coal mixed with dried sludge. The method comprises a first step of making papermaking waster paper sludge into the dried sludge by dewatering, a second step of enabling the dried sludge and the power plant fire coal to be fully mixed, a third step of utilizing a coal mill to grind the power plant fire coal mixed with the dried sludge into powder, a fourth step of enabling the mixed powder of the ground dried sludge and the power plant fire coal to be placed in a hearth to be burnt, enabling calcium ions and magnesium ions in the dried sludge to be combined with sulfur dioxide in flue gas in the high-temperature burning process, generating sulfur-containing sediments, and removing sulfur-containing components in coal. The method is simple in process and low in equipment cost and production cost, can reduce use of a desulfurizer by over 30%, turns the papermaking waster paper sludge into wealth, and is high in economic benefits and social benefits.

Description

technical field [0001] The invention relates to the technical field of environmental protection desulfurization technology, in particular to a method for combustion desulfurization of coal-fired mixed dried sludge in a power plant. Background technique [0002] my country is the world's largest coal producer and consumer, and about 80% of coal production is directly used for combustion, SO 2 China's emissions have ranked first in the world, and pollution control, purification and protection of the ecological environment have become my country's basic national policy. Therefore, the research and development of desulfurization technology suitable for my country's economic development is of great significance to solve air pollution and control the environment. [0003] At present, the desulfurization technology of thermal power plants is commonly used or reported. The commonly used reactants are alkaline compounds, such as lime and magnesium oxide. When using them as desulfuri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10
Inventor 刘名中林新阳张益安伍忠磊刘湘飞
Owner DONGGUAN NINE DRAGONS PAPER IND
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