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Vertical industrial pulverized coal boiler system

A pulverized coal boiler, vertical technology, applied to steam boilers, boiler cleaning devices, water tube steam boilers, etc., can solve the problems of high cost of pulverizing equipment in front of the furnace, increased cost of pulverized coal manufacturing, and uneven combustion. Achieve the effect of low operation and maintenance cost, small footprint and good air tightness

Inactive Publication Date: 2012-07-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 2) If the system uses pre-furnace pulverizing equipment, the cost of the required pre-furnace pulverizing equipment is too high
[0010] 3) The boiler adopts horizontal internal combustion, and the combustion is not very uniform. There is often a certain thermal deviation between the front and rear smoke chambers, and because of the limited furnace space, it is not conducive to low NO x Application of Combustion Technology
[0011] 4) The use of dry dust removal and dry desulfurization in the flue gas treatment process requires two independent devices, making the system relatively complicated, while the use of furnace desulfurization will increase the cost of coal powder manufacturing

Method used

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  • Vertical industrial pulverized coal boiler system
  • Vertical industrial pulverized coal boiler system
  • Vertical industrial pulverized coal boiler system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a vertical industrial pulverized coal boiler system includes a pulverizing device in front of the furnace, a pulverized coal boiler body, a flue gas treatment device and a chimney 8 . The pulverizing device in front of the furnace is composed of a high-pressure suspension roller mill 1 and a spiral coal feeder 2; the flue gas treatment device is composed of a cyclone water film desulfurization dust collector 6 and an induced draft fan 7. After the coal is transported to the boiler room, it is further pulverized by the high-pressure suspension roller mill 1 to meet the combustion needs of the pulverized coal boiler. The qualified coal powder enters the spiral coal feeder 2 with the airflow and is transported to the burner 3 with a blower, and enters the boiler body for combustion. .

[0031] The boiler body includes a furnace 4, a horizontal flue 16, and a vertical smoke shaft 17. The three are arranged in a vertical "∏" shape. The furnace 4 i...

Embodiment 2

[0040] Such as image 3 As shown, a sewage discharge device is added between the upper drum 9 and the cyclone water film desulfurization dust collector 6, so that the sewage from the upper drum 9 is decompressed by the sewage discharge device and introduced into the water film desulfurization dust collector 6, which reduces the Sewage discharge, recycling resources.

[0041] The sewage discharge device includes main and auxiliary regulating valves 21, 23, a continuous sewage discharge expansion vessel 22, a pressure gauge 24, and a rotameter 25. The main regulating valve 21 is connected in the pipeline between the upper drum 9 and the continuous sewage expansion vessel 22, and the auxiliary regulating valve 23, pressure gauge 24, and rotameter 25 are connected between the sewage expansion vessel 22 and the cyclone water film desulfurization dust collector 6 in the pipeline between them.

[0042] This embodiment can effectively utilize boiler blowdown water. The boiler blowdo...

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Abstract

The invention discloses a vertical industrial pulverized coal boiler system, which comprises a stokehole pulverization device connected with a pulverized coal boiler body through a combustor, and the pulverized coal boiler body is connected with a chimney through a flue gas processing device. The vertical industrial pulverized coal boiler system is characterized in that: the pulverized coal boiler body comprises a horizontal flue, a hearth respectively communicated with two ends of the horizontal flue, and a vertical smoke well which are arranged in a vertical inverted U shape; the hearth consists of membrane water walls; a position of the hearth communicated with the outlet of the horizontal flue is provided with a slag condensing bank used for preventing high temperature flue gas from slagging; the horizontal flue behind the slag condensing pipe bundle is provided with a superheater and an convection bank inside in turn; the convection bank is connected to upper and lower boiler barrels positioned on upper and lower sides of the horizontal flue; the vertical smoke well is provided with an economizer and an air preheater inside from top to bottom; and the lower part of the vertical smoke well is connected with the flue gas processing device through a connecting flue. The vertical industrial pulverized coal boiler system has the advantages of high integration degree, small occupied area, high combustion efficiency, energy conservation, environmental protection, and wide market application prospect.

Description

technical field [0001] The invention belongs to the field of coal-fired industrial boilers, in particular to a vertical coal industrial pulverized boiler system. Background technique [0002] Industrial boilers are important equipment in national economic life, widely used, and demanded in huge quantities. At present, there are more than 580,000 industrial boilers in use in China, of which about 480,000 are coal-fired boilers, accounting for about 83% of the total capacity of industrial boilers, and the annual consumption of raw coal is about 600 million tons. [0003] The design efficiency of domestic coal-fired industrial boilers is 72%-80%, which is close to the international level, but its operating efficiency is 60%-65% on average, which is 15-20 percentage points lower than the foreign advanced level. The low thermal efficiency of industrial boilers not only increases energy consumption, but also causes serious pollution to the environment. my country's industrial bo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B21/34F22B37/54F23J15/02F23K1/00F23C5/08
Inventor 王树众吴志强陈林罗明
Owner XI AN JIAOTONG UNIV
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