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Rotary kiln melting method fly ash full resource recovery and tail gas ultra-clean emission method

A technology of rotary kiln and melting method, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of stricter chloride ion content requirements, restrictions on the promotion of fly ash technology, and low fly ash content, and achieve the realization of The effects of harmless disposal, high social and economic benefits, and uniform distribution of temperature field

Active Publication Date: 2022-05-27
TIANJIN YIMING ENVIRONMENTAL TECH CO LTD
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Problems solved by technology

Cement kiln co-processing technology also has industrial applications, but the requirements for the content of chloride ions in kiln materials are relatively strict, complex pre-treatment processes are required, and the amount of fly ash is low, which limits the large-scale promotion of cement kiln co-processing fly ash technology

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  • Rotary kiln melting method fly ash full resource recovery and tail gas ultra-clean emission method

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Embodiment Construction

[0035] Below with reference to the accompanying drawings, the present invention will be further described by specific implementation examples, a kind of rotary kiln melting method fly ash full resource recovery and utilization and tail gas ultra-clean discharge method, it comprises following technological process:

[0036] (1) Fly ash melting method disposal system;

[0037] (2) Pre-dust and cooling system;

[0038] (3) Flue gas purification system;

[0039] (4) Concentrated ash pickling system;

[0040] (5) Full resource recovery system for pickling solution;

[0041] The fly ash melting method disposal system includes the following steps:

[0042] The ratio of fly ash and additives in the raw material storage silo is fly ash: additives = 4:1 according to the dry basis of the raw materials. After weighing by the metering screw, they are transported to the screw conveyor, and then transported to the unloading chute after mixing. , enter the rotary kiln from the end of the ...

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Abstract

The invention belongs to the technical field of solid waste treatment and disposal, and specifically relates to a novel rotary kiln melting method fly ash full resource recycling and tail gas ultra-clean discharge method, including: fly ash melting method disposal system, pre-dust removal and cooling system, and flue gas purification system , concentrated ash pickling system and full resource recovery system for pickling liquid. The fly ash melting method disposal unit realizes high-temperature melting and detoxification of fly ash; the pre-dust removal and cooling system intercepts the dispersed ash in the flue gas and prevents the low-temperature resynthesis of dioxin-like organic pollutants; the flue gas purification system realizes ultra-clean flue gas Emission; concentrated ash pickling system, which provides conditions for the recovery of heavy metals and soluble salts in concentrated ash through pickling; pickling solution full resource recovery system, separates heavy metals and soluble salts in the pickling solution and recovers them separately. The invention realizes the high-dosage and large-scale disposal of fly ash from incineration of domestic waste, realizes the full resource recovery of fly ash matrix, soluble salts and heavy metals, and truly realizes the harmlessness, reduction and resource utilization of fly ash.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and disposal, and in particular relates to a method for recycling and utilizing all resources of fly ash by a rotary kiln melting method and for ultra-clean exhaust gas discharge. Background technique [0002] Domestic waste incineration fly ash contains high concentrations of heavy metals and soluble salts that are easily leached. At the same time, organic substances such as dioxins are also enriched in fly ash, which are hazardous wastes that need to be controlled in all countries in the world. Has been included in the "National Hazardous Waste List" (HW18). Domestic waste incineration fly ash contains a lot of toxic substances, and its essence is to concentrate the pollutants scattered in the environment for incineration, removal, separation and concentration. [0003] The methods of innocuous treatment of waste incineration fly ash mainly include three categories: wet chemical t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00B01D46/02B01D53/10B01D53/56B01D53/75B01D53/78B01D53/86B09B101/30
CPCB01D46/02B01D53/10B01D53/56B01D53/75B01D53/78B01D53/86B01D53/8628B01D53/8631B09B5/00B01D2258/0283B01D2253/102B01D2251/304B01D2251/2062B09B3/10B09B3/40
Inventor 王建伟朱雁鸣王娟娟陈春霞向瀚朱杰张曙光纪涛
Owner TIANJIN YIMING ENVIRONMENTAL TECH CO LTD
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