Solid waste pyrolysis and related gas combustion device

Abstract

The invention discloses a solid waste pyrolysis and related gas combustion device. The device comprises a solid processor, a gas combustor and a draught fan; the solid processor comprises a shell, a raw material conveying mechanism, a pyrolyzing furnace and a slag conveying mechanism; the gas combustor comprises a heat exchanger and a combustion chamber, wherein the heat exchanger is provided withan air inlet channel and an air outlet channel which are isolated from each other and can exchange heat with each other, wherein the air inlet channel is provided with a waste gas inlet and a waste gas outlet, and the air outlet channel is provided with a flue gas inlet and a flue gas outlet; and the waste gas outlet and the flue gas inlet communicate with the combustion chamber, the waste gas inlet communicates with an air extraction port through a pipeline and the draught fan, and the flue gas outlet communicates with a chimney. According to the device, the problem that combustible gas generated by pyrolysis is difficult to combust after being diluted due to the fact that a large amount of fresh air is sucked in due to air extraction conducted on the solid processor is solved; and the technological process is simplified, and the equipment investment can be reduced.

Description

technical field [0001] The invention relates to a device for solid waste pyrolysis and related gas combustion, in particular to a pyrolysis device applied to solid waste reduction and harmless treatment and coordinated with harmful gas treatment, which belongs to energy-saving and environmental protection technology field. Background technique [0002] High-temperature pyrolysis is one of the effective means of harmless reduction treatment of solid waste such as sludge and garbage. If these solid wastes are directly burned, a large amount of harmful tail gas will be generated to pollute the environment due to insufficient combustion, and it will cost a lot of money. The cost of exhaust gas purification is also high because the combustion of solid substances requires the use of excessive combustion air, which causes a large amount of flue gas heat loss and consumes energy. However, the typical vertical pyrolysis furnace in the existing pyrolysis equipment has problems such a...

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Problems solved by technology

[0002] High-temperature pyrolysis is one of the effective means of harmless reduction treatment of solid waste such as sludge and garbage. If these solid wastes are directly burned, a large amount of harmful tail gas will be generated to pollute the environment due to insufficient combustion, and it will cost a lot of money. The cost of exhaust gas purification, but also because the combustion of solid substances requires the use of excessive combustion air, resulting in the loss of a large amount of flue gas heat and energy consumption

However, the typical vertical pyrolysis furnace in the existing pyrolysis equipment has problems such as complex structure, high energy consumption and poor safety.

The water sealing method adopted by the vertical pyrolysis furnace to avoid the leakage of toxic gas from the slag outlet not only causes the heat of the slag to be cooled by water and wastes heat energy, but also produces a large amount of water vapor rising when the high-temperature slag meets water and is absorbed by the material again. Substances with heavy mud content are prone to bonding, resulting in poor air permeability and compaction, which hinders the normal progress of pyrolysis and increases energy consumption. This equipment needs to consume solid waste such as sludge with low calorific value A large amount of energy consumption for dehydration before pyrolysis has greatly increased the treatment cost and has not been widely used

[0003] Traditional pyrolysis devices need to produce high-concentration combustible gas before they can be used in combustion devices such as hot blast stoves. Since high-concentration combustible gas leaks, it will easily cause personnel poisoning and gas explosion risks, posing a great safety hazard

In addition, there are usually harmful gases in solid waste storage and operation areas, including the drying and dehumidification of solid waste before pyrolysis, which is also accompanied by the generation of harmful gases. The previous method is to deal with it through other waste gas treatment settings. Common methods include water spraying These methods have problems such as poor treatment effect, high treatment cost and secondary pollution.

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