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Plasma synergistic resistance furnace fly ash treatment system and treatment method

A treatment system and plasma technology, which is applied in the field of fly ash treatment in an ion cooperative resistance furnace, can solve the problems of exceeding the leaching limit, high operating costs, and the inability to fundamentally eliminate heavy metal pollution in fly ash, so as to reduce oxidation and prolong service life Effect

Pending Publication Date: 2020-03-06
成都启川新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to address the shortcomings of the above-mentioned existing fly ash treatment technology, to provide a plasma cooperative resistance furnace fly ash treatment system and treatment method, to solve the problem that the leaching value of heavy metals after the existing fly ash treatment still exceeds the provisions of GB5085.3-2007 The leaching limit cannot fundamentally eliminate the problem of heavy metal pollution in fly ash, and it also solves the problems of low thermal efficiency and high operating cost in the existing ash treatment process

Method used

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  • Plasma synergistic resistance furnace fly ash treatment system and treatment method
  • Plasma synergistic resistance furnace fly ash treatment system and treatment method
  • Plasma synergistic resistance furnace fly ash treatment system and treatment method

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Embodiment 1

[0055] The plasma cooperative resistance furnace ash treatment system provided by the present invention includes a feeding system, a melting and solidification system and a flue gas discharge system;

[0056] Described feeding system comprises feeding funnel, the mixer 4 that is communicated with feeding funnel outlet, the spreader 5 that is connected with mixer outlet; Feeding system is made up of three feeding funnels, and each feeding funnel is communicated with mixer respectively, will Add all materials to the blender and mix. Each hopper is equipped with a rotary sealing valve, which isolates the air through the material seal generated during the feeding process, so that the entire melting process is in an oxygen-deficient process. The spreader is equipped with an automatically rotating rake, which is used to evenly spread the material on the surface of the entire molten inner liquid surface.

[0057] The melting and solidification system includes a melting furnace 7 for m...

Embodiment 2

[0068] This implementation is to deal with fly ash of vertical cylindrical hazardous waste. First start the water pump 74 of the plasma cooling water system, and then start the nitrogen generator 72. When the dissolved oxygen meter on the gas outlet pipeline of the melting furnace 7 is <0.1mg / L, start the plasma power supply 71. At this time, the nitrogen gas passes through the high pressure in the plasma torch 70. After the ionization, a plasma flow is generated to heat the melting furnace 7 to raise the temperature. During the heating process, the bypass cooler 9, the denitrification tower 10, the desulfurization tower 11 and the flue gas fan 12 are turned on. The water passing through the plasma torch enters the cooling tower 73 for cooling, so that the temperature of the water entering the plasma torch is <40° C., and then is pumped into the plasma torch by the water pump 74 to cool the cathode and anode of the plasma torch. After heating up to 1200°C, continuously add cu...

Embodiment 3

[0071]This embodiment is to process the fly ash of mechanical grate type medical waste. First start the water pump 74 of the plasma cooling water system, and then start the nitrogen generator 72. When the dissolved oxygen meter on the gas outlet pipeline of the melting furnace 7 is <0.1mg / L, start the plasma power supply 71. At this time, the nitrogen gas passes through the high pressure in the plasma torch 70. After the ionization, a plasma flow is generated to heat the melting furnace 7 to raise the temperature. During the heating process, the bypass cooler 9, the denitrification tower 10, the desulfurization tower 11 and the flue gas fan 12 are turned on. The water passing through the plasma torch enters the cooling tower 73 for cooling, so that the temperature of the water entering the plasma torch is <40° C., and then is pumped into the plasma torch by the water pump 74 to cool the cathode and anode of the plasma torch. After heating up to 1200°C, continuously add cullet...

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Abstract

The invention provides a plasma synergistic resistance furnace fly ash treatment system and a treatment method. Broken glass (or silicon dioxide powder) is melted by a plasma torch to form a mother solution, the power supply of the plasma torch is cut off, then an electrode power supply is started to be heated by utilizing an electrode, and then the fly ash and the broken glass and the lime are mixed according to a certain proportion (the silicon and calcium ratio is 2-3) and then are uniformly stirred, and then the fly ash and the broken glass and the lime are fed into a melting furnace to besubjected to glass stabilization through a material scattering machine. The organic matters such as dioxin in the fly ash are subjected to high-temperature decomposition, heavy metal cadmium, chromium, lead, copper and other heavy metals enter a grid structure formed by silicon oxygen to be cured and stabilized, and the heavy metal leaching concentration in the glass of the melting furnace is farlower than that of the leaching standard limit value in the GB5085.3-2007, and the fly ash are converted into glass bodies to be subjected to resource utilization after water quenching, the residualorganic matters in the fly ash treated by oxygen-free high-temperature decomposition to generate gas pollutants, and the gas pollutants are subjected to cooling, desulfurization and denitrification treatment, and then discharge is carried out after reaching the atmospheric pollutant emission standard of a GB9078 industrial kiln.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste incineration and waste incineration fly ash treatment, and in particular relates to a method for treating fly ash with a plasma cooperative electric resistance furnace. Background technique [0002] Municipal solid waste, industrial solid waste and some types of hazardous waste are mainly treated by incineration. Incineration is an effective method to achieve solid reduction, resource utilization and harmlessness, but incineration cannot treat solid waste at one time. Solve the problem of harmlessness. In the fly ash produced in the tail gas treatment process (waste heat boiler and bag filter) in the incineration treatment, the leaching of heavy metals in it is higher than the specified limit of the leaching toxicity identification of the GB5085.3-2007 hazardous waste identification standard, and belongs to HW18 in the hazard list. . At present, the incineration method adopts three main ...

Claims

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Application Information

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IPC IPC(8): B09B3/00B01D53/02
CPCB01D53/02B01D2253/102B01D2253/10B01D2257/30B01D2257/40B09B3/29B09B2101/30
Inventor 雷光玖张贤彬
Owner 成都启川新能源科技有限公司
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