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Circulating water washing pretreatment process for domestic waste incinerator slag

A domestic waste incineration and circulating water technology, applied in waste treatment, recycling technology, solid waste removal, etc., can solve problems such as high landfill costs, waste of resources, and stacking of waste slag

Pending Publication Date: 2018-12-07
上海秦望环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic waste incineration is a more commonly used high-efficiency reduction and harmless disposal technology, but the waste slag generated after incineration still has problems of stacking and pollution, which is not conducive to the promotion and application of domestic waste incineration technology
Unpretreated incinerator slag is mainly disposed of in landfill, and urban landfill sites are becoming increasingly scarce, and landfill costs are getting higher and higher; Buried and wasted resources, there are also hidden dangers of environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A pretreatment process for domestic waste incineration slag circulating water washing, comprising the following steps:

[0023] The first step is to use manual sorting methods to pick out unburned substances such as steel bars, wood blocks, and plastics that can be distinguished visually in the slag of domestic waste incineration.

[0024] In the second step, the domestic waste incineration slag treated in the first step is subjected to primary crushing with a hammer crusher, and the particle size of the crushed slag is 0-95 mm.

[0025] The third step is to perform primary magnetic separation on the obtained product obtained in the second step using a drum type permanent magnet iron remover to remove iron impurities.

[0026] The fourth step is to inject pressure filter circulating water into the crushed material, and use an impact crusher to perform secondary water injection crushing, and the particle size of the slag after crushing is 0-9mm.

[0027] The fifth step ...

Embodiment 2

[0031] A pretreatment process for domestic waste incineration slag circulating water washing, comprising the following steps:

[0032] The first step is to use manual sorting methods to pick out unburned substances such as steel bars, wood blocks, and plastics that can be distinguished visually in the slag of domestic waste incineration.

[0033] In the second step, the primary crushing is carried out with a hammer crusher, and the particle size of the slag after crushing is 0-100 mm.

[0034] The third step is to perform primary magnetic separation on the obtained product obtained in the second step using a drum type permanent magnet iron remover to remove iron impurities.

[0035] The fourth step is to inject pressure filter circulating water into the crushed material, and use an impact crusher to perform secondary water injection crushing. After crushing, the particle size of the slag is 0-9.5mm.

[0036] The fifth step is to use the eddy current separation process for sec...

Embodiment 3

[0040] A pretreatment process for domestic waste incineration slag circulating water washing, comprising the following steps:

[0041] The first step is to use manual sorting methods to pick out unburned substances such as steel bars, wood blocks, and plastics that can be distinguished visually in the slag of domestic waste incineration.

[0042] In the second step, the slag treated in the first step is subjected to primary crushing with a hammer crusher, and the particle size of the slag after crushing is 0-90 mm.

[0043] The third step is to perform primary magnetic separation on the obtained product obtained in the second step using a drum type permanent magnet iron remover to remove iron impurities.

[0044] The fourth step is to inject pressure filter circulating water into the crushed material, and use an impact crusher to carry out secondary water injection crushing, and the particle size of the slag after crushing is 0-10mm.

[0045] The fifth step is to use the eddy...

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PUM

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Abstract

The invention discloses a circulating water washing pretreatment process for domestic waste incinerator slag. The circulating water washing pretreatment process for the domestic waste incinerator slagcomprises the following steps: first, removing unburnt substances, such as reinforcing steel bars and wood blocks, in the domestic waste incinerator slag through manual sorting; and then, performingpretreatment processes of primary crushing, primary magnetic separating, water injecting secondary crushing, secondary magnetic separating, circulating water washing and the like so as to obtain a domestic waste incinerator slag renewable material which can be subjected to resource utilization. Through a series of treatment processes of crushing, magnetic separating, circulating water washing andthe like, the circulating water washing pretreatment process for the domestic waste incinerator slag provides a new method for treatment of the domestic waste incinerator slag, ensures the feasibilityof the resource utilization of the domestic waste incinerator slag, effectively relieves the treatment pressure of the domestic waste incinerator slag in an urbanization process, and has remarkable environmental and social benefits.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource recovery pretreatment, and specifically relates to a pretreatment process for domestic waste incineration slag circulating water washing. Background technique [0002] In recent years, with the expansion of cities and the improvement of people's living standards, the discharge of domestic waste has increased rapidly, and the problem of domestic waste treatment and disposal has seriously affected the normal development of cities. Domestic waste incineration is a more commonly used high-efficiency reduction and harmless disposal technology, but the waste slag produced after incineration still has problems of stacking and pollution, which is not conducive to the promotion and application of domestic waste incineration technology. Unpretreated incinerator slag is mainly disposed of in landfill, and urban landfill sites are becoming increasingly scarce, and landfill costs are getting highe...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00Y02W30/20Y02W30/78
Inventor 李运杰刘广森
Owner 上海秦望环保材料有限公司
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