Frequency conversion and automatically controlled dual-purpose boiler with built-in precombustion chamber using coal water slurry or oil as fuel

Abstract

The automatically controlled frequency varying burning two-purpose coal water slurry and oil boiler with pre-combustor includes one boiler body and one combustor connected to the front end of the boiler body. In the front part inside the boiler body, there is one pre-combustor integrated with the boiler body. The combustor is automatic split two-purpose one capable of burning coal water slurry and oil, and includes casing, spray gun assembly, spray gun executing part, controlling valve assembly, air door mechanism, oil pump and oil pump motor. The present invention has fast ignition, stable combustion, automatic control and capability of burning both coal water slurry and oil.

Description

technical field [0001] The invention relates to a fully automatic control boiler, in particular to a variable frequency automatic control combustion coal-water slurry and oil dual-purpose boiler with a built-in pre-combustion chamber. Fluidized coal-based fuel - coal-water slurry or oil - made with 1% additive. Background technique: [0002] At present, the high oil price in the international market has caused many enterprises and institutions to face the situation of doubled fuel prices and increased economic burden. At the same time, in recent years, environmental problems have been related to the sustainable development of the economy. Some large and medium-sized cities In order to reduce the pollution of industrial boilers to the atmosphere and limit the use of coal-fired boilers, coal-fired fuel (gas) is changed from coal-fired. Changing from coal to fuel oil (gas) will undoubtedly reduce air pollution and improve boiler thermal efficiency. However, because the price ...

AI Technical Summary

Problems solved by technology

[0004] 1. The design of the burner and the boiler are out of touch with each other, often resulting in poor compatibility. The combustion device is a simple structure, which can only burn coal-water slurry but not fuel oil. The whole process from ignition to cease-fire is manual. Use a cotton yarn torch dipped in oil to ignite light oil , simple light oil nozzle with manual valve switch

[0005] 3. The air distribution is also turned off manually. If the air volume is large, the fire will be blown out, and if the air volume is insufficient, black smoke will be emitted. After the fire is blown out, the oil injection pipe cannot be closed quickly. , deflagration occurs, no flameout protection device, no automatic front and rear purge

[0006] 4. Unreasonable design of the pre-combustion chamber or separation from the furnace body, resulting in unstable combustion, coking and heat loss, etc.

[0007] 5. The nozzle body of the coal water slurry nozzle adopts an integral structure, and there is no heat-resistant and wear-resistant material embedded in the nozzle hole, resulting in poor heat resistance, wear resistance and rigidity of the nozzle; the coal water slurry directly hits the inner wall of the nozzle, and the nozzle needs to be replaced as a whole. Makes the service life of the coal water slurry nozzle short

[0008] 6. The degree of automatic control of burners and boilers is low

[0009] 7. The fuel oil and coal-water slurry of the burner cannot be automatically switched, the oil gun needs to be pulled out during combustion, the burner is rough in manufacture, and the control level is low

[0010] 8. In addition, the combustion load of the combustion device used cannot be automatically adjusted with the change of the heat load. When various abnormalities and overruns occur in the equipment equipped with the burner, the manual valve cannot be closed quickly. Over-limit conditions such as over-temperature and over-pressure cannot be eliminated quickly, especially for heating systems with temperature requirements, which will have a serious impact and cause accidents, ranging from damage to the main equipment and auxiliary equipment, to serious casualties

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