Pulverized coal boiler capable of subcritically combusting lean coal

A pulverized coal boiler, subcritical technology, applied in steam boilers, combustion equipment, indirect carbon dioxide emission reduction and other directions, can solve the problems of insufficient combustion, high sulfur content, waste of energy, etc. Avoid the effect of coking

Active Publication Date: 2013-07-17
WUXI HUAGUANG BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coal type is lean coal with Vdaf=14%. Since this type of coal has the characteristics of difficult ignition, low burning, medium coking, and high sulfur content, the existing pulverized coal boilers make this type of coal unable to fully burn and waste energy.

Method used

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  • Pulverized coal boiler capable of subcritically combusting lean coal
  • Pulverized coal boiler capable of subcritically combusting lean coal
  • Pulverized coal boiler capable of subcritically combusting lean coal

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Embodiment Construction

[0018] See figure 1 , figure 2 , image 3 , Figure 4 , which includes a furnace 1, a superheater, an economizer 2, and an air preheater 3. A burner 4 is arranged in the furnace 1. The superheater includes a high-temperature superheater 5 and a low-temperature superheater 6. A high-temperature superheater is installed above the furnace 1. 5, the upper part of the furnace 1 is connected to the shaft flue 7, and the two sides of the shaft flue 7 are separated. A superheated steam inlet pipe 8 is provided, and an accident water spray desuperheater 9 is installed on the superheated steam inlet pipe 8, which is used as an emergency water spray to protect the superheater; the shaft flue 7 is located at the low temperature superheater 6 and the economizer 2 The flue gas temperature-regulating baffles 10 are respectively arranged under the , the high-temperature superheater 5 and the low-temperature superheater 6 are respectively connected to the micro-spray desuperheater 11, and ...

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Abstract

The invention provides a pulverized coal boiler capable of subcritically combusting lean coal. The pulverized coal boiler comprises a hearth, superheaters, coal economizers and an air preheater. Combustors are arranged in the hearth. The pulverized coal boiler is characterized in that the superheaters include high-temperature superheaters and low-temperature superheaters, the high-temperature superheaters are arranged on the upper side of the hearth, a flue with a vertical shaft is communicated with the upper side of the hearth, two sides of the flue with the vertical shaft are separated from each other, the low-temperature superheaters and the coal economizers are respectively arranged on the two sides of the flue with the vertical shaft, a superheated steam inlet pipeline is arranged below the low-temperature superheaters, an emergency spray attemperator is mounted on the overheated steam inlet pipeline, the flue with the vertical shaft is provided with flue gas temperature regulating barriers which are respectively arranged below the low-temperature superheaters and the coal economizers, and the high-temperature superheaters and the low-temperature superheaters are respectively connected with trim spray attemperators. The pulverized coal boiler has the advantages that the lean coal with the Vdaf (volatile) equal to 14% can be sufficiently combusted in the boiler, so that energy is sufficiently utilized, and the pulverized coal boiler is energy-saving.

Description

technical field [0001] The invention relates to the technical field of pulverized coal boiler structure, in particular to a subcritical pulverized coal boiler burning lean coal. Background technique [0002] my country is a big country of coal production and consumption. In order to reduce the pollution of coal to the environment, improve the utilization rate of energy, and realize the sustainable development of the energy industry, the development of large-scale pulverized coal boilers can replace many original low-efficiency, high-energy-consumption, and high-pollution boilers. Small boilers are easy to form the scale benefits of enterprises, which not only improves the economic benefits of enterprises, saves energy consumption, but also reduces pollutant emissions, which is beneficial to environmental protection. Therefore, the market prospect of large pulverized coal boilers is very broad. The coal type is lean coal with Vdaf=14%. Since this type of coal has the character...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B31/04F23C7/00
CPCY02E20/34
Inventor 韦志平沈解忠毛军华李俊何雁飞张学明薛金彪耿长萍孟慧陈益增
Owner WUXI HUAGUANG BOILER
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