Vertical superconducting pyrogasification furnace for garbage

Abstract

The invention relates to a vertical superconducting pyrogasification furnace for garbage. The vertical superconducting pyrogasification furnace is composed of three parts, i.e., a double-layered tubefurnace body, a stirrer and a burner. The vertical superconducting pyrogasification furnace is characterized in that the double-layered tube furnace body is composed of two layers of a circular tube and a double-layer circular head, and the two layers of the circular tube communicate with the double-layer circular head to form a cup-shaped superconductor; the double-layer circular head of the cup-shaped superconductor is filled with a high-temperature superconductive working medium; the inner tube wall of the cup-shaped superconductor is provided with a plurality of heat-dissipating fins, andthe outer tube wall of the cup-shaped superconductor is wrapped by a high-temperature-resistant heat-insulating layer; a furnace cover on the furnace body is provided with a feeding tube equipped witha valve and a water injection nozzle; the burner is placed in the part, located at the lower part of the double-layer circular head, of a furnace base; the stirrer is placed in the middle part of thefurnace body; and the upper end of the stirrer is connected with a drive motor through a clutch and a speed reducer. The burner uses gas produced by the garbage pyrogasification furnace for heating at the lower part of the cup-shaped superconductor, and generated radiant heat can be rapidly and uniformly transmitted to garbage in the furnace body via the cup-shaped superconductor and the superconducting stirrer, thereby completing high-efficiency pyrogasification of the garbage. The temperature in a garbage reaction zone of the pyrogasification furnace is balanced, so the dangers of bonding,bulging, block-forming and coking of garbage caused by local overheating in conventional cracking furnaces are avoided, the release of harmful cracked substances is shielded, and the generation of dioxin is suppressed; and solid residues produced after cracking can be used as a chemical raw material, and obvious comprehensive economic benefits are produced.

Description

Technical field: [0001] The invention relates to a household garbage treatment device, in particular to a vertical superconducting household garbage cracking gasifier with low energy consumption and high efficiency. Background technique [0002] The disposal of municipal solid waste has become an important task for the coordinated development of energy, environment and society, and an important and urgent task for governments at all levels in our country. [0003] Pyrolysis and gasification of domestic waste is an advanced technology to realize waste reduction, harmlessness, and recycling. Today, when "garbage siege" has become a public hazard, the use of pyrolysis and gasification technology to treat waste has been highly valued by countries all over the world and the Chinese government. [0004] The pyrolysis gasification of garbage is to put domestic garbage in a specific equipment, and under a certain temperature and pressure, make a series of chemical reactions between ...

AI Technical Summary

Problems solved by technology

[0005] At present, in the process of garbage disposal in my country, vertical furnaces are used to "gasify" garbage. The garbage is basically incinerated in the combustion furnace, and a large amount of smoke, dust, particulate matter, acid gas, unburned waste, heavy metals and trace Organic compounds, etc., will produce a large amount of carcinogenic dioxins and heavy metals, the waste gas output is low, the ash is large, and subsequent treatment is required, continuous operation is not possible, and the operating cost and fixed investment are very high.

There are also traditional cracking furnaces used to process garbage, and the garbage does not need to be incinerated. However, the existing traditional garbage cracking furnace has a single-layer furnace wall, which uses external heat supply, and there is no temperature balance device in the garbage reaction zone, which cannot keep the reaction zone relatively stable. The high temperature and pressure make it difficult for the cracking furnace to continuously and stably produce combustible gas, but still cannot avoid the generation of smoke, and cannot shield the harmful molecules released by the cracking products from polluting the environment

In particular, the traditional cracking furnace body is a single-tube single-layer structure, and the heater is arranged near the garbage inlet of the cracking furnace. The burner is used to locally heat the single-tube single-layer furnace body near the inlet outside the furnace body, and the radiant heat passes through the single-layer furnace. The body conducts to the garbage near the inlet end. Because the garbage cracking furnace body has a large diameter and long axial direction, the single-tube single-layer furnace body is partially heated by a thousand-degree flame, and its temperature field is uneven along the axial and radial directions of the furnace body. As a result, the heating temperature of the garbage in the furnace is uneven, resulting in local overheating and side reactions of garbage cracking, and even accidents of garbage carbonization and coking in the furnace due to local overheating

In addition, the temperature of the garbage in the furnace is always falling when it travels from the inlet end to the outlet end. Most of the garbage cannot reach the temperature conditions for cracking and gasification, which seriously affects the efficiency of garbage cracking and gasification.

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