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Efficient clean coal combustion technology

A high-efficiency and clean technology, applied in the direction of combustion method, combustion product treatment, climate change adaptation, etc., can solve problems such as dust, air pollution, and inability to take out fine coal ash, and achieve the goals of reducing pollution, stabilizing the connection structure, and saving water Effect

Active Publication Date: 2019-04-05
SAINYEAR HLDG GRP HANGZHOU COGENERATION
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Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: the fine coal ash in the flue gas after coal combustion cannot be taken out, thereby generating dust and air pollution

Method used

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  • Efficient clean coal combustion technology
  • Efficient clean coal combustion technology
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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] A clean coal high-efficiency combustion process, such as figure 1 As shown, it mainly includes the following steps:

[0034] Step S1: Combustion, the furnace 1 is divided into a main combustion zone 11, a reburning zone 12 and a burnout zone 13 from bottom to top. 80%~85% of the pulverized coal is transported to the main combustion zone 11 in the furnace 1 through the coal feeder, and the pulverized coal is ignited. Air is delivered to the main combustion zone 11 by the first blower for combustion of pulverized coal, and the excess air coefficient of the main combustion zone 11 is 0.9-1.0. 15% to 20% of the pulverized coal is transported to the reburning zone 12 in the furnace 1 by a coal feeder, and the air is transported to the reburning zone 12 by a second blower fan for combustion of the pulverized coal. The excess air coefficient of the reburnin...

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Abstract

The invention discloses an efficient clean coal combustion technology, and belongs to the field of thermoelectricity. According to key points of the technical scheme, the technology comprises the following steps that S1, combustion is conducted, a coal feeding machine is adopted to convey coal powder into a furnace hearth of a circulating fluidized bedboiler; S2, separating is conducted; S3, heatexchanging is conducted; S4, dedusting is conducted; S5, desulphurization and denitrification are conducted, smoke is conveyed to a desulphurization and denitrification tower; S6, coal powder ash is collected, in the S4, liquid containing the coal powder ash is filtered with a filter cloth to obtain coal powder ash mud and filtering water; S7, drying is conducted, the coal powder ash mud is conveyed to a collecting barrel by a spiral conveying machine, and the coal powder ash mud is dried when conveyed; and S8, steam is collected, the steam produced by coal powder ash mud drying in the S7 is conveyed to a back-feeder, so that the steam and coarse particles enter the furnace hearth together. The efficient clean coal combustion technology has the effect of reducing pollution to the atmosphere by fine coal ash.

Description

technical field [0001] The invention relates to the technical field of thermoelectricity, more specifically, it relates to a clean coal high-efficiency combustion process. Background technique [0002] Coal is a combustible black or brown-black sedimentary rock that is an important energy resource. However, there is still a small amount of nitrogen and sulfur in coal, which will produce sulfide and nitrogen oxides that are harmful to the environment when burning coal, and incomplete combustion of coal will produce dust and cause serious damage to the atmosphere. In order to reduce the harm to the environment, the transformation of coal into green and clean fuel has attracted more and more attention. [0003] At present, the Chinese invention patent application with the notification number CN105999992A discloses a coal combustion furnace desulfurization, denitrification and denitrification flue gas treatment process, including the following steps: when using coal for initial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J15/02F23J15/00
CPCF23J15/00F23J15/02F23J15/025F23J15/027F23J2215/101F23J2215/20Y02A50/2351
Inventor 高张泉
Owner SAINYEAR HLDG GRP HANGZHOU COGENERATION
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