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Dangerous waste incineration ash synergistic plasma melting recycling system and method

A technology for incinerating ash and slag and plasma, which is applied in separation methods, combustion methods, chemical instruments and methods, etc., can solve the problems of high cost of ash and slag treatment technology, secondary fly ash pollution, easy blockage of the back-end flue, etc. The effect of realizing high-value utilization and reducing processing costs

Pending Publication Date: 2022-05-27
EVERBRIGHT ENVIRONMENTAL PROTECTION TECH RES INST SHENZHEN CO LTD +2
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Technical problem to be solved: Aiming at the above technical problems, the present invention provides a hazardous waste incineration ash collaborative plasma melting recycling system and method, which can effectively solve the high cost of the above ash treatment technology, easy blockage of the back-end flue, secondary flying Deficiencies such as gray pollution

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  • Dangerous waste incineration ash synergistic plasma melting recycling system and method
  • Dangerous waste incineration ash synergistic plasma melting recycling system and method
  • Dangerous waste incineration ash synergistic plasma melting recycling system and method

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Embodiment 1

[0038] like figure 1 As shown, a hazardous waste incineration ash and slag collaborative plasma melting and recycling system includes an ash and slag pretreatment system, a plasma melting system, a flue gas purification system and a slag cotton making system. The ash and slag pretreatment system includes a fly ash pretreatment system. A processing system, a bottom slag pretreatment system and a batching system, the fly ash pretreatment system includes a fly ash storage bin 1, a first quantitative feeder 2, a water washing tank 3, a first dryer 4 and a granulator 5, The bottom slag pretreatment system includes a bottom slag temporary storage pit 6, a crusher 7, a screening machine 8, a magnetic iron remover 9 and a second dryer 10, and the batching system includes a fly ash product bin 11, a second quantitative feeder. Feeder 12, first bucket elevator 13, bottom slag product bin 14, third quantitative feeder 15, second bucket elevator 16, mixer 17, third bucket elevator 18 and ...

Embodiment 2

[0046] The main phases in hazardous waste incineration fly ash are NaCl, KCl soluble salt and deacidification product CaCl 2 , CaSO 4 and unreacted slaked lime; acid oxide SiO in bottom slag 2 +Al 2 O 3 The content is high, reaching more than 40%, and the content of basic oxides CaO and MgO is low, less than 15%. After the chloride salts in the fly ash are removed, the fly ash mainly contains CaO, which can be used as a calcium-containing additive to be melted cooperatively with the bottom slag. In addition, the fly ash contains a certain amount of carbon, because the activated carbon injected in the flue gas treatment process of the rotary kiln incineration is enriched in the soot; the carbon content in the bottom slag is 7.38%, which is caused by the insufficient incineration of waste in the rotary kiln. , the carbon in the ash can be used as a reducing agent in the melting process to reduce the metal oxides in the ash.

[0047] A method for recycling hazardous waste in...

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Abstract

The invention discloses a hazardous waste incineration ash synergistic plasma melting recycling system and method.The hazardous waste incineration ash synergistic plasma melting recycling system comprises an ash pretreatment system, a plasma melting system, a flue gas purification system and a molten slag cotton making system.The ash pretreatment system comprises a fly ash pretreatment system, a bottom slag pretreatment system and a batching system; the plasma melting system comprises a plasma furnace and a power supply device, and the flue gas purification system comprises a secondary combustion chamber, a waste heat boiler, a quenching cooling tower, a deacidification tower, a bag-type dust collector, a first adsorption tower, a second adsorption tower, a third adsorption tower, an induced draft fan, a detection device, a chimney and a ton bag packaging machine. The slag cotton making system comprises a slag transfer tundish, a centrifugal fiber forming machine, a cotton collecting machine, a pleating machine, a curing oven and a cutting machine. According to the method, long-term stable operation of the system is facilitated, high-value utilization of the ash is achieved, the ash treatment cost is reduced, and finally zero emission of pollutants is achieved.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste incineration fly ash and bottom slag treatment, and in particular relates to a system and method for recycling hazardous waste incineration ash and slag by coordinating plasma melting. Background technique [0002] In recent years, the domestic hazardous waste disposal volume has grown rapidly. In 2018, nearly 30 million tons of hazardous waste were disposed of, of which about 50% were incinerated, and about 4.5 million tons of ash were produced after incineration. The "National List of Hazardous Wastes" (2019 revision) lists the fly ash and bottom residue generated during the incineration and disposal of hazardous wastes as hazardous wastes (belonging to HW18 incineration disposal residues). dispose of. [0003] At present, the domestic technologies for the disposal of hazardous waste incineration ash mainly include safe landfill and plasma melting and vitrification. Among them, safe la...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B3/30B09B3/35B09B3/38B09B3/40F23G7/00F23G5/16F23G5/44F23G5/46F23G7/06B01D53/00B01D53/04B01D53/30B09B101/30
CPCB09B3/00F23G7/00F23G5/16F23G5/444F23G5/46F23G7/06B01D53/002B01D53/0407B01D53/30B01D2258/0283
Inventor 虎训胡明宫臣徐鹏程宗肖齐景伟李小明肖诚斌
Owner EVERBRIGHT ENVIRONMENTAL PROTECTION TECH RES INST SHENZHEN CO LTD