Anti-slagging biomass cascade conversion combustion device

A combustion device and biomass technology, applied in the combustion of solid fuel, combustion method, combustion equipment, etc., can solve the problem of easy coking of straw, and achieve the effects of avoiding coke slagging, wide adjustment range and reducing heat flux density.

Active Publication Date: 2017-04-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem that the existing chain furnace is easy to coke when burning straw, and to provide an anti-slagging biomass cascade conversion combustion device

Method used

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  • Anti-slagging biomass cascade conversion combustion device
  • Anti-slagging biomass cascade conversion combustion device
  • Anti-slagging biomass cascade conversion combustion device

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Experimental program
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specific Embodiment approach 1

[0025] Specific implementation mode one: as figure 1 , the present embodiment is an anti-slagging biomass cascade conversion combustion device, which is specifically composed of a chain furnace 1, a first blower 13, a second blower 15, a high-temperature induced draft fan 14, a steam generator 16 and an air preheater 17 composition;

[0026] The front arch 9 of the chain furnace 1 is located below the furnace wall 8 above the furnace, and the front arch 9 forms an angle of 20° to 25° with the horizontal direction, so as to strengthen the heat exchange between the high-temperature flue gas and the unburned combustible gas in the furnace. ; The rear arch 10 forms an included angle of 15° to 20° with the horizontal direction, so as to strengthen the heat exchange between the high-temperature flue gas and the coke particles on the surface of the chain grate 2; the bottom of the grate 2 of the chain furnace 1 is arched from the front arch 9 to the rear The direction 10 is the circ...

specific Embodiment approach 2

[0040] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the distance between the secondary air nozzle 11 and the fire grate 2 along the height direction of the furnace is 1 meter. Others are the same as the first embodiment.

specific Embodiment approach 3

[0041] Specific implementation mode three: as figure 2 , this embodiment is an anti-slagging biomass cascade conversion combustion device, which is different from the specific embodiment 1 in that:

[0042] The water vapor-circulating flue gas chamber 5 communicates with the air outlet of the high-temperature induced draft fan 14, and the air inlet of the high-temperature induced draft fan 14 communicates with the flue outlet 1-1 at the tail of the chain furnace 1. 380°C, the temperature of the coke gasification zone of the control grate 2 is 800°C-850°C; the angle between the rear arch 10 and the horizontal direction is 15°. Others are the same as in the first embodiment.

[0043] In the water vapor-circulating flue gas chamber 5 of this embodiment, water vapor is not used, and only circulating flue gas is used. At this time, the gasification medium of coke is carbon dioxide, and the gasification reaction of coke and carbon dioxide is higher than that of coke and water vapo...

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Abstract

The invention provides an anti-slagging biomass cascade conversion combustion device and relates to a biomass combustion device. The anti-slagging biomass cascade conversion combustion device aims at solving the technical problem that slagging happens easily when straw is combusted through an existing chain furnace. The anti-slagging biomass cascade conversion combustion device is composed of a chain furnace, a steam generator, an air blower, a high-temperature induced draft fan and an air preheater. A secondary air nozzle is arranged on the front wall below a front arch. An overfire air nozzle is arranged on the front arch. A circulating flue gas chamber communicates with a flue opening in the tail of the chain furnace through the high-temperature induced draft fan. A weak primary air chamber communicates with the air blower through the air preheater. A steam-circulating flue gas chamber communicates with the steam generator and the high-temperature induced draft fan. A strong primary air chamber communicates with the air blower through the air preheater. The secondary air nozzle communicates with the air blower. The overfire air nozzle communicates with the air blower. The anti-slagging biomass cascade conversion combustion device effectively solves the problem of slagging of biomass combustion chain grates.

Description

[0001] Technical field: [0002] The invention relates to a biomass burning device. Background technique [0003] The resource utilization of rural straw waste can not only turn waste into treasure, but also effectively reduce air pollution. At present, most of the straw is burned in the open air, which is extremely harmful. First, when straw is burned, the combustion is incomplete and the concentration of particulate matter is high, which is one of the causes of smog; second, straw burning can easily ignite the surrounding combustibles and cause a fire. Third, the burning of straw causes the ground temperature to rise sharply, destroying the nutrients in the soil and affecting the full absorption of soil nutrients by crops. Therefore, the development of large-scale straw burning devices is an effective way to realize the utilization of straw resources. Biomass contains a large amount of alkali metals, which can easily cause slagging on the grate and ash on the heated area ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23B90/06F23L7/00F23L15/00
CPCF23B90/06F23L7/005F23L15/00Y02E20/34
Inventor 赵义军高建民栾积毅杜谦孙绍增吴少华赵广播秦裕琨
Owner HARBIN INST OF TECH
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