Vertical industrial pulverized coal boiler system

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, and particularly relates to a vertical coal-fired industrial boiler system. Background technique [0002] Industrial boilers are important equipment in national economic life, widely used and huge in demand. At present, there are more than 580,000 industrial boilers in use in China, of which about 480,000 coal-fired boilers, accounting for about 83% of the total industrial boiler capacity, consume about 600 million tons of raw coal each year. [0003] The design efficiency of domestic coal-fired industrial boilers is 72%-80%, which is close to the international level, but its operating efficiency averages 60%-65%, which is 15-20% lower than the advanced foreign level. The low thermal efficiency of industrial boilers not only increases energy consumption, but also causes serious environmental pollution. my country's industrial boilers emit about 2 million tons of soot and 7 million tons of ...

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

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