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High-temperature air lighting system under bed for fluidized bed and circulating fluidized bed boiler

A circulating fluidized bed, high-temperature air technology, applied in fluidized bed combustion equipment, fuel burning in a molten state, lighting and heating equipment, etc. , to achieve significant social benefits, great promotion value, and easy ignition.

Inactive Publication Date: 2008-10-01
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, problems such as high fuel consumption, poor ignition safety, large amount of daily maintenance and environmental pollution caused by this under-bed oil gun ignition method have become the main factors restricting the under-bed oil gun ignition of circulating fluidized bed boilers. seriously affect the implementation of the basic national policy of saving oil resources and establishing a conservation-oriented country

Method used

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  • High-temperature air lighting system under bed for fluidized bed and circulating fluidized bed boiler
  • High-temperature air lighting system under bed for fluidized bed and circulating fluidized bed boiler
  • High-temperature air lighting system under bed for fluidized bed and circulating fluidized bed boiler

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Embodiment 1

[0031] Referring to accompanying drawings 1, 2, and 3, the ignition system under the high-temperature air bed of the fluidized bed and circulating fluidized bed boiler is composed of a boiler main body 1, an air distribution plate 2, an air chamber 3, and a primary air duct 4. The air duct is connected with an ignition air duct 5, and the ignition air duct communicates with the air inlet 8 of the electromagnetic induction heater 7 through the ignition air valve 6, and the air outlet 9 of the electromagnetic induction heater communicates with the high-temperature ignition air duct 10, and the high-temperature ignition The air duct communicates with the primary air duct; a primary air valve 11 is connected to the primary air duct between the junction of the primary air duct and the ignition air duct and the junction of the primary air duct and the high-temperature ignition air duct .

[0032] The electromagnetic induction heater consists of a heating body 12 made of magnetically...

Embodiment 2

[0035] Example 2: Ignition system under high temperature air bed for 75t / h circulating fluidized bed boiler

[0036] The overall structure of the ignition system under the high-temperature air bed of a 75t / h circulating fluidized bed boiler is the same as that of Example 1. In this example, the heating body of the electromagnetic induction heater is made of 3YC52 material with high temperature resistance, oxidation resistance and good magnetic conductivity. Its cross-sectional shape is the clapboard shape shown in Figure 3; the heating body is 1.8m long, 0.5m in diameter, and has 13 built-in clapboards; the insulation layer adopts a high-strength non-magnetic ceramic tube; the power circuit adopts an intermediate frequency of 250kw / 1000HZ SCR adjustable power supply. Two electromagnetic induction heaters are arranged in parallel in the system.

Embodiment 3

[0037] Example 3: Ignition system under high temperature air bed for 220t / h circulating fluidized bed boiler

[0038]The overall structure of the ignition system under the high-temperature air bed of a 220t / h circulating fluidized bed boiler is the same as that of Example 1. In this example, the heating body of the electromagnetic induction heater is Ni-Fe-Cr- It is made of Al-based superalloy material, and its cross-sectional shape is the round-hole honeycomb shape shown in Figure 4; the heating body is 1.8m long and 0.5m in diameter, and there are 56 holes with a diameter of 20mm in total, and 24 holes are opened on the edge of the heating body. A semicircular hole with a diameter of 20mm; the insulation layer adopts a high-strength non-magnetic and high-temperature resistant furnace lining; the power circuit uses a 600kw / 1000HZ IGBT intermediate frequency power adjustable power supply. Four electromagnetic induction heaters are arranged in parallel in the system.

[0039] ...

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Abstract

The invention relates to an igniting system for flowing bed and circulating fluid bed boiler in the high temperature air, comprising furnace body, air distribution plate, wind room and wind channel for a first wind, characterized in that electromagnetic induction heater is connected with the wind channel for a first wind in parallel. The first wind is heated by electromagnetic induction heater and is formed high temperature igniting air with more than 900DEG C. Then it enters into furnace to fluidize the igniting material on the air distribution plate and ignite is gradually. The invention is provided with simple technology and structure, no assistant fuel such as oil and gas, low igniting cost, good economic benefit; conveniently adjusting, simple operation, safety and stability, high successful ratio during igniting process; little maintenance in daily and no circumstance pollution so on. It has an influence of energy-saving, oil-saving and circumstance protection and so on. It can be widely applied in the igniting of flowing bed and circulating fluid bed boiler in electrical factory or heat supply system and have huge application value. After it brings into effect social, environmental and economical benefits can be produced notably.

Description

technical field [0001] The invention relates to the improvement of the under-bed ignition technology of a fluidized bed and a circulating fluidized bed boiler, in particular to an under-bed ignition system of a fluidized bed and a circulating fluidized bed boiler with high-temperature air. Background technique [0002] In my country's primary energy, coal accounts for 71%, oil and natural gas account for 25%. The annual output of oil is about 170 million tons, and 120 million tons of oil were imported in 2004, accounting for about 7% of the world's oil trade volume. In the next 20 years, China's dependence on oil imports will increase year by year, which will endanger the country's energy security. [0003] Fluidized bed and circulating fluidized bed combustion technology has wide fuel adaptability, high combustion efficiency, good desulfurization effect, NO X Due to the advantages of low emission, large load adjustment range and comprehensive utilization of ash, it has be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C10/18
Inventor 王擎孙佰仲李少华豆海强柏静儒王鹏
Owner NORTHEAST DIANLI UNIVERSITY
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