The plasma pyrolysis gasification process uses the excellent characteristics of plasma, such as high enthalpy, high temperature, high energy concentration, extremely high electrothermal conversion efficiency and extremely fast reaction speed. Through the ionization of air in the cracking chamber (also known as a combustion chamber) of the gasifier, it can instantly generate a high temperature of more than 2000 – 10000 ℃ around the plasma torch, Under the high temperature condition of 1200-1400 ℃, the garbage can be quickly cracked and gasified into a mixed combustible gas mainly composed of CO, H 2O 3 and some organic small molecules (CMHN) and containing a small amount of so 2O 3, non, HCI, HF and other acidic gases. These combustible gases enter the second combustion chamber for full combustion (the temperature can reach more than 1100 ℃), and the tail gas can be discharged after purification; Inorganic substances such as glass and metals contained in garbage melt into basalt like solid substances with no activity and toxicity at high temperature, which can be directly landfilled or comprehensively utilized.

Plasma is a state of matter, juxtaposed with solid state, liquid state and gas state. Compared with the other three states of matter, the range of parameters that plasma can exist is abnormally wide (its density, temperature and magnetic field intensity can span more than ten orders of magnitude). The morphology and properties of plasma are strongly affected by the external electromagnetic field, And there are extremely rich collective movements (such as various electrostatic waves, drift waves, electromagnetic waves, and nonlinear coherent structures and turbulence), so the energy is extremely concentrated, and has a very high electrothermal efficiency (more than 85%), and the high temperature generated can restore all substances that are difficult to restore and insoluble, which can be completed in an instant, so it has been widely valued and applied at present. "Plasma special waste incinerator" uses plasma technology to ionize the air, which can reach 500 ℃ - 1500 ℃ in one thousandth of a second. All toxic substances and gases will be rapidly cracked at high temperature, so they will not produce toxic gases such as dioxins, eliminating the occurrence of secondary pollution.

A. When the garbage is put into the "plasma special garbage gasifier", the organic garbage is rapidly dehydrated, pyrolyzed and cracked in the plasma to produce mixed combustible gases with H 2O, Co 2O and some organic gases as the main components, and then after secondary combustion to achieve volume reduction and harmlessness. Inorganic substances (metals, glasses) are melted under the action of plasma at high temperature to achieve the purpose of volume reduction. It can completely handle all kinds of wastes without classification.

B. High temperature smelting reduction reaction does not need oxygen supply, and the volume of syngas is only less than 20% of the volume of general incinerator waste gas. C. The decomposition of organic waste is converted into syngas and then burned for power generation, which can generate enough electricity for the whole plant.

D. No dioxin and acid gas problems.

E. The exhaust gas emitted by syngas (CO Ω, H Ω) generator is mainly Co Ω, H Ω o.

F. Slag can be recycled or directly buried.

G. The equipment has high durability and long service life.

H. Refractory materials do not need to be replaced within five years.

I. It has achieved business performance.

J. Low power consumption, high power generation, low consumables and low operation cost.

[Technical introduction]

With the rapid development of social economy and modern industry, the treatment of an increasing number of wastes, especially toxic and hazardous wastes, has become a major headache for governments all over the world. Hazardous waste is toxic, explosive, corrosive, chemical reactive, infectious, radioactive and other harmful characteristics, which pollutes the environment and can last for a long time.

Due to various technical and economic reasons for hazardous waste treatment, China currently adopts direct landfill or stacking methods for hazardous waste treatment, which not only occupies a lot of land, but also seriously pollutes soil, groundwater and atmosphere, threatens people's health, destroys the surrounding environment, and poses long-term harm to our future generations. The technology of plasma treatment of hazardous waste is to use the high-temperature thermal plasma produced by the plasma torch to quickly decompose and destroy the hazardous waste, in which the organic matter is pyrolyzed into combustible small molecular substances, and the inorganic matter is fused at high temperature to form vitreous like residue. This technology has the characteristics of fast reaction speed, small secondary pollution and wide application range. It overcomes the problems of large secondary pollution, complex process and waste selectivity of traditional treatment technologies such as incineration and chemical treatment. It is especially suitable for the environmental protection treatment of solid hazardous wastes such as medical waste, asbestos, incineration fly ash, batteries, tires, radioactive pollution, etc. The unique treatment method of plasma treatment of hazardous waste shows safety, efficiency, no secondary pollution and wide applicability. It provides a very scientific and effective method for the harmless, volume reduction and resource recovery of hazardous waste and municipal solid waste.

[Technical features]

Compared with conventional incineration technology, plasma treatment technology is an environment-friendly technology with complete treatment, no secondary pollution and less carbon emission. Plasma is usually an ionized gas containing a large number of electrons, ions, molecules, atoms and free radicals, but it is electrically neutral and has high chemical activity. The central temperature of the thermal plasma can reach more than 20000 degrees Celsius, and the flare edge temperature can also reach about 3000 degrees Celsius. Plasma technology can completely destroy all kinds of toxic and harmful substances. It is a new technology that can effectively eliminate pollution and has a wide range of uses. The core technology of plasma waste treatment process is plasma generator (plasma torch). In terms of generator, DC arc plasma is widely used. Using plasma as the heat source for treatment has the following special advantages in practical application:

[Applicable fields and scope]

It is suitable for the environmental protection treatment of solid hazardous wastes such as medical waste, electronic waste, asbestos, incineration fly ash, batteries, tires, radioactive pollution, etc. At present, medical waste and industrial hazardous waste are mainly serious in China. Medical waste includes used syringes, needles, infusion tubes, gauze, medicine bottles, waste medical plastic products, toxic cotton balls, waste dressings, surgical residues, animal experiment waste, photosensitive lotion, waste developer, etc. These wastes contain a large number of infectious viruses, which are breeding grounds for bacteria and viruses. These garbage incineration generally still adopts the traditional gas and oil combustion method, and this gas and oil combustion method adopts the incinerator treatment. Because the temperature in the incinerator is not high (generally lower than 900 ℃, but the actual situation is only below 700 ℃), it is very easy to produce dioxins (250 ℃ ~550 ℃), and infectious viruses cannot be completely treated. (some infectious viruses will still survive at 1100 ℃), more than one-third of the combustibles and some bacteria remain in the burned garbage ash. The burned garbage ash will be landfilled as domestic garbage, which will separate out of the ground over a long period of time, and will still cause secondary pollution to the environment. After seepage, it will affect soil and water quality, and people, livestock, and drinking water will spread rapidly. Even if the packaging is used for centralized treatment, it is also very easy to be distributed during transportation in urban areas, and it is also easy to pollute the environment again. Plasma is a kind of new heat source with high enthalpy, high temperature, fast reaction time, energy concentration and extremely high electrothermal conversion efficiency (85%~95%), which is the best for industrial application. When using plasma technology to treat waste, it can be treated without selecting the shape of waste, with a wider range of treatment and strong applicability. Using plasma method, it is easy to obtain a temperature higher than any traditional method (1200 ℃ ~1700 ℃), which will not produce dioxins, waste incineration will be more thorough, and will not bring secondary pollution. The residual ash reduction of the burned garbage is ≤ 3%, and the burned garbage can be landfilled as domestic garbage.