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A Combustion System for Improving the Safety and Economy of the Front and Back Wall Opposite Fire Boilers

A technology for hedging combustion and combustion systems, which is applied in the combustion using lump fuel and powder fuel, the combustion using lump fuel and gaseous fuel, and the combustion using liquid fuel and powder fuel, etc. The rise of ash combustibles, high temperature corrosion steam temperature control and other problems can reduce the control steam temperature, increase the residence time, and eliminate the residual rotation.

Active Publication Date: 2017-12-22
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and to provide a combustion system that improves the safety and economy of the front and rear wall opposed combustion boilers. Fly ash and combustibles rise, water wall coking, high temperature corrosion and difficulty in steam temperature control, etc.

Method used

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  • A Combustion System for Improving the Safety and Economy of the Front and Back Wall Opposite Fire Boilers
  • A Combustion System for Improving the Safety and Economy of the Front and Back Wall Opposite Fire Boilers
  • A Combustion System for Improving the Safety and Economy of the Front and Back Wall Opposite Fire Boilers

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Embodiment Construction

[0027] The present invention is described in further detail below in conjunction with accompanying drawing:

[0028] refer to figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6 , the combustion system for improving the safety and economy of the front and rear walls opposing combustion boilers of the present invention includes a primary fan 13, a secondary fan 14, an air preheater 12, a furnace 1, a number of direct-flow overburning air nozzles 3, a number of first The overburning air nozzle 4, some second overburning air nozzles 5 and some swirl burners 2; the outlet of the primary fan 13 is divided into two paths through the air preheater 12, one of which is connected with the primary air of each swirl burner 2. The inlet is connected, and the other is connected with the inlet of each direct-flow overburning air nozzle 3; the outlet of the secondary fan 14 passes through the air preheater 12 and the inlet of the first overburning air nozzle 4 and the s...

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Abstract

The invention discloses a combustion system for improving the safety and economical efficiency of the front and rear wall opposing combustion boilers, comprising a primary blower fan, a secondary blower fan, an air preheater, a furnace, a number of direct-flow burn-out air nozzles, and a number of first burn-out air nozzles , a number of second overburning air nozzles and a number of swirl burners. The invention can effectively solve the problems of increased fly ash combustibles, coking of the water wall, high temperature corrosion, large deviation of oxygen amount at both sides of the furnace outlet and difficulty in controlling the steam temperature in the front and rear wall opposed combustion boilers caused by air depth classification.

Description

technical field [0001] The invention belongs to the field of thermal power generation equipment, and relates to a combustion system, in particular to a combustion system which improves the safety and economy of a combustion boiler with opposite front and rear walls. Background technique [0002] At present, the combustion methods in large pulverized coal combustion boilers mainly adopt four-corner tangential combustion and front and rear wall hedging combustion. Due to its advantages in combustion stability and heating surface layout, the front and rear wall opposed combustion boiler has become one of the main combustion methods used by supercritical boilers and supercritical boilers. In the opposite combustion mode of the front and rear walls, the swirl burners are arranged on the water-cooled walls of the front wall and the rear wall of the furnace, and each burner organizes air distribution independently, and the flames are relatively independent; the flames of the burner...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C5/28F23C7/02
CPCY02E20/34
Inventor 王一坤陈国辉周平柳宏刚解冰
Owner XIAN THERMAL POWER RES INST CO LTD
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