Multi-physical-state incineration technology for industrial hazardous wastes

A treatment process and industrial technology, applied in the field of purification and treatment of industrial hazardous waste, can solve the problems of high investment cost, large wet water consumption and high operating cost

Inactive Publication Date: 2015-08-05
JIANGSU TIANYING ENVIRONMENTAL PROTECTION ENERGY COMPLETE EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wet method consumes a lot of water, produces a large amount of wastewater, the system is complicated, the initial investment cost is high and the operating cost is high

Method used

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Embodiment Construction

[0014] Hazardous industrial waste (which can be solid alone, liquid alone, or mixed with solid and liquid) enters the first and second combustion chambers in sequence through the feeding system for incineration. Among them, the first combustion temperature is 850°C ± 5°C, and the first combustion time is 45-75 minutes. The waste liquid with high calorific value is incinerated in the first combustion chamber, and part or all of the auxiliary fuel is replaced to save operating costs. The high-temperature flue gas enters the second combustion chamber from the kiln tail of the rotary kiln. Under the conditions of temperature 1100-1200°C and second combustion time ≥ 2s, it can incinerate other low calorific value waste liquids and smoke that are not suitable for incineration in the first combustion chamber. More than 99.99% of dioxins and other harmful components in the air will be decomposed. The ash formed after incineration enters the water-sealed scraper slag discharger from th...

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Abstract

The invention discloses a multi-physical-state incineration technology for industrial hazardous wastes, and refers to the technical field of a purifying treatment of the industrial hazardous wastes. The incineration technology comprises the following steps: performing denitration treatment on industrial hazardous wastes after burning twice, and then cooling smoke gas and neutralizing with Ca (OH)2; neutralizing and absorbing smoke gas after reaction by slaked lime, and then discharging it after removing dust by a bag type dust collector; centralizing slag fluid discharged in above steps and then solidifying. According to different physical states, the hazardous wastes can be subdivided into solid hazardous wastes, liquid hazardous wastes and semisolid hazardous wastes, and so on. The multi-physical-state incineration technology selects the incineration method, and is well-adapted to incineration wastes, mature in technology, reliable in running, and relative simple in running and operation; besides, the multi-physical-state incineration technology can well satisfy requirements of various hazardous incinerations on feeding, slag discharging, complete burning and the like.

Description

technical field [0001] The invention relates to the technical field of purification treatment of industrial hazardous waste. Background technique [0002] At present, domestic and foreign industrial hazardous waste incinerators are widely used in the treatment of fixed and mechanical grates, liquid injection furnaces and pyrolysis gasification furnaces. Due to the large number of moving parts, the maintenance of the mechanical grate is relatively complicated and the investment is relatively high, so it is mostly used to treat domestic waste; the liquid injection furnace is mainly used for the incineration of waste liquid, and the feed has limitations; for the incinerator below 10t / d, Pyrolysis and gasification furnaces are widely used, however, the pyrolysis and gasification furnace requires the density of the incoming material to be less than 300kg / m 3 , the ingredients need to be pretreated. [0003] For the deNOx process of hazardous waste incineration flue gas treatmen...

Claims

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Application Information

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IPC IPC(8): F23J7/00F23J15/04B01D53/60B01D53/68
Inventor 肖燕伍长青钱兵李军陈竹
Owner JIANGSU TIANYING ENVIRONMENTAL PROTECTION ENERGY COMPLETE EQUIP CO LTD
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