CN104624607B - Domestic waste incineration residue processing method - Google Patents

Domestic waste incineration residue processing method Download PDF

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Publication number
CN104624607B
CN104624607B CN201410815012.XA CN201410815012A CN104624607B CN 104624607 B CN104624607 B CN 104624607B CN 201410815012 A CN201410815012 A CN 201410815012A CN 104624607 B CN104624607 B CN 104624607B
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China
Prior art keywords
particle diameter
particle
less
clinker
waste incineration
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CN201410815012.XA
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Chinese (zh)
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CN104624607A (en
Inventor
邵启超
谢迎洪
汪浩
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光大环保(中国)有限公司
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Abstract

The present invention provides a kind of domestic waste incineration residue processing method, and it comprises the steps:1) sort:Bulk materials are selected by sorting;2) magnetic separation:Magnetic metal is extracted by magnetic separation;3) sieve:Particle of multigroup particle diameter more than 5mm is isolated by multistage screening, to be left the particle that particle diameter is less than 5mm;4) eddy current separation:Extract the intragranular nonmagnetic metal that multigroup particle diameter is more than 5mm respectively by eddy current separation;With 5) wet-treating:Appropriate recirculated water is added in particle of the particle diameter less than 5mm, and is sorted by jigging machine and shaking table, extracts the nonmagnetic metal in the particle size range.Domestic waste incineration residue processing method proposed by the present invention, reduced in the case of more than 50% in the yield of water consumption, sewage and sludge, the clinker for producing different-grain diameter scope gathers materials, farthest extraction metal especially below 5mm nonmagnetic metal, investment is less than pure dry process technique simultaneously, possesses preferable economic benefit.

Description

Domestic waste incineration residue processing method

Technical field

The present invention relates to technical field of domestic garbage treatment, in particular to a kind of domestic waste incineration residue semidry method Handling process.

Background technology

Using domestic garbage burning electricity generation technology, after domestic waste burns at a high temperature of 1000 DEG C, stove can be produced Slag.The volume of clinker is about the 20%~30% of former house refuse.Domestic waste incineration residue color is dark brown;Granular size Differ, complicated components, main component Ca, Si, Na, K, Fe, Al and part heavy metal.Though clinker dispatches from the factory through oversintering During mix into a large amount of impurity early stage, such as glass, iron plate, bottle cap and iron, copper metal, such as iron nail, iron wire, iron plate, copper spiral shell Mother etc..

The processing method of domestic and international domestic waste incineration residue mainly includes two kinds of dry and wet, both purposes be all by METAL EXTRACTION and recycling in clinker, melt down burnings after combustible separation, residue is mainly formed as slag, ceramic broken Piece, masonry and glass, aggregate, the replacement aggregate of cement/concrete, landfill can be substituted as asphalt road surface after processing Field covering material, embankment and roadbed material etc., finally make domestic waste incineration residue farthest recycling.

Clinker wet processing technique is by sorting, removing big iron, screening, wet crushing, remove thin iron, remove and have coloured gold The technological processes such as category, realize the extraction of metal and the purification of clinker.However, the domestic wet processing process generally used is produced Raw large amount of sewage and sludge can cause more serious secondary pollution to environment.Produced clinker aggregate size distribution compared with To be uniform, lack grading characteristic, current majority be used to prepare fragment of brick and cement block, and added value is low.If it is used in house , larger potential safety hazard also be present in building.

Compared with wet method, the difference of clinker dry process technique is using non-magnetic in eddy current separation technology extraction clinker Property metal ingredient, whole technical process effectively avoids the secondary pollution problem of sewage and precipitating sludge without using water.Production The clinker aggregate size gone out can be distributed according to use demand in grading, therefore, be suitable for the high added values such as town road construction Field.But dry process equipment is generally difficult to extract below 5mm nonferrous metal, this is also the technical bottleneck institute of the sector .

Therefore, it is necessary to a kind of new slag treatment process is proposed, to solve the deficiencies in the prior art.

The content of the invention

A series of concept of reduced forms is introduced in Summary, this will enter in specific embodiment part One step describes in detail.The Summary of the present invention is not meant to attempt to limit technical scheme claimed Key feature and essential features, the protection domain for attempting to determine technical scheme claimed is not meant that more.

In order to overcome the problem of presently, there are, one aspect of the present invention provides a kind of domestic waste incineration residue processing method, It comprises the steps:1) sort:Bulk materials are selected by sorting;2) magnetic separation:Magnetic metal is extracted by magnetic separation;3) sieve Point:Particle of multigroup particle diameter more than 5mm is isolated by multistage screening, to be left the particle that particle diameter is less than 5mm;4) vortex flow point Choosing:Extract the intragranular nonmagnetic metal that multigroup particle diameter is more than 5mm respectively by eddy current separation;With 5) at wet method Reason:Appropriate recirculated water is added in particle of the particle diameter less than 5mm, and is sorted by jigging machine and shaking table, extracts this Nonmagnetic metal in particle size range.

Preferably, the step 3) includes:30) particle separation diameter is more than 20mm material, is left the thing that particle diameter is less than 20mm Material;With by slot size be 31) 10 and 5mm screening plants, sifted out in the material from particle diameter less than 20mm particle diameter 10~ 20mm, 5~10mm and the particle less than 5mm.

Preferably, the step 3) also includes:300) removed by selection by winnowing organic light in material of the particle diameter more than 20mm Float thing;Material of the particle diameter more than 20mm is crushed with 301) circulating, until particle diameter is less than 20mm.

Preferably, also include before the step 1):It is temporary:Pending clinker is temporary for a period of time, so that clinker Moisture content be maintained at optimization process scope, that is, avoid producing airborne dust in processing procedure, can smoothly realize again screening and sorting, And make clinker itself that carbonic acid effect occur, and then stabilize.

Domestic waste incineration residue processing method proposed by the present invention, organically combine current dry method slag treatment process with it is wet The advantages of method slag treatment process, to more than 5mm clinkers using dry method eddy current separation technology extraction nonmagnetic metal, to 5mm Following clinker then using wet method jigging machine and separation by shaking table technology extraction nonmagnetic metal, overcomes dry method slag treatment process pair Below 5mm metals are difficult to the shortcomings that extraction, farthest extract the metal in each particle size range clinker;Overcome simultaneously at wet method The excessively uniform situation of particle grain class distribution, the clinker for producing different-grain diameter gather materials in science and engineering skill.Using provided by the invention The clinker of method production, which gathers materials, is divided into 0~5mm, 5~10mm and 10~20mm, tri- grades.

Further, because a domestic waste incineration residue processing method proposed by the present invention part uses wet-treating work Skill, a part uses dry process technique, thus can reduce the water consume during slag treatment, and work is handled compared to conventional wet Skill, semidry method domestic waste incineration residue processing method water consumption of the invention reduces more than 50%, and can reduce by more than 50% Sewage and sludge yield.

In summary, domestic waste incineration residue processing method proposed by the present invention, in the production of water consumption, sewage and sludge In the case that raw amount reduces more than 50%, the clinker for producing different-grain diameter scope gathers materials, and it is outstanding farthest to extract metal It is below 5mm nonmagnetic metal, while investment is less than pure dry process technique, possesses preferable economic benefit.

Brief description of the drawings

The drawings below of the present invention is used to understand the present invention in this as the part of the present invention.Shown in the drawings of this hair Bright embodiment and its description, for explaining the principle of the present invention.

In accompanying drawing:

Fig. 1 is the flow chart for the domestic waste incineration residue processing method that side's embodiment of the invention proposes.

Embodiment

In the following description, a large amount of concrete details are given to provide more thorough understanding of the invention.So And it will be apparent to one skilled in the art that the present invention can be carried out without one or more details.At it In his example, in order to avoid obscuring with the present invention, it is not described for some technical characteristics well known in the art.

In order to thoroughly understand the present invention, detailed structure and step will be proposed in following description, to explain this hair The technical scheme of bright proposition.Presently preferred embodiments of the present invention is described in detail as follows, but in addition to these detailed descriptions, the present invention There can also be other embodiment.

Fig. 1 is the flow chart for the domestic waste incineration residue processing method that side's embodiment of the invention proposes.Tie below Fig. 1 is closed the domestic waste incineration residue processing method of the present invention is described in detail.

As shown in figure 1, first, performing step S100, house refuse is being burned into power plant's progress burning disposal, and obtain stove Slag.

Then, step S101 is performed, dregs of incinerator is kept in.That is, by dregs of incinerator when temporary library stacks one section Between (about 1~2 month) so that the moisture content of clinker is maintained at optimization process scope, general moisture content is reduced to 15%~18%, So both avoid producing airborne dust in processing procedure, can smoothly realize screening and sorting again, while carbonic acid can occur for clinker itself Effect, it is preferably stabilized.

Then, step S102 is performed, the clinker obtained by step S101 is sorted.That is, hand picking slag discharging In bulk materials, including metal, fragment of brick etc..Preferably, by manual sorting, the optional magnetic metal and copper, aluminium etc. such as tap a blast furnace Metal.

Then, step S103 is performed, magnetic separation is carried out to the clinker obtained by step S102, will be artificial difficult by magnetic separation Extracted with the magnetic metal of discrimination, residue then enters subsequent treatment.

Then, step S104 is performed, carries out first stage screening.The slot size 20mm of first stage screening, particle diameter are big It will be separated in 20mm particle, and be left the particle that particle diameter is less than 20mm.

It is more than 20mm particle for particle diameter, performs step S105, by selection by winnowing, removes the screening thing that particle diameter is more than 20mm Organic light thing in material, the organic light thing isolated are back to step S100, continue burning power plant's burning;And pass through step The material screening obtained after rapid S105 selection by winnowing then then performs step S106, is crushed.That is, circulate broken particle diameter and be more than 20mm Particle, until particle diameter is less than 20mm.

It is less than 20mm particle for particle diameter, performs step S107, carries out second stage screening.The sieve of second stage screening Hole size is 10mm, to sift out particle of the particle diameter between 10~20mm, and obtains the clinker that particle diameter is less than 10mm.

Particle of the particle diameter obtained to process step S107 processing between 10~20mm, performs step S108, passes through whirlpool Electric current sorting proposes nonmagnetic metal therein, to obtain particle diameter gathering materials between 10~20mm.

To the clinker obtained by step S107 processing, step S109 is performed, carries out phase III screening.Phase III sieves The slot size of choosing is 5mm, to sift out particle of the particle diameter between 5~10mm, and obtains the clinker that particle diameter is less than 5mm.

Particle of the particle diameter obtained to process step S109 processing between 5~10mm, performs step S110, passes through whirlpool electricity Classification proposes nonmagnetic metal therein, to obtain particle diameter gathering materials between 5~10mm.

To the clinker obtained by step S109 processing, step S111 is performed, carries out jigging machine sorting.Make below 5mm's Particle enters jigging machine, and with the effect of recirculated water (ascending current is faster than descent waterflow).Thus, the dense media in clinker Grain is fully settled down to jigging motor spindle and is collected;

Then step S112 is performed, carries out separation by shaking table.The pulpous state clinker obtained by step S111 drains into shaking table, passes through Shaking table efficiently, automatically screens, and again separates the metal class dense media remained in clinker, to remove below 5mm metals Grain.

Then step S113 is performed, the clinker obtained by step S112, is put into sedimentation basin precipitation.

Then step S114 is performed, the particulate matter precipitated by step S113, drains the stove that 5mm is yielded less than after sieving Slag aggregate.

The present invention is illustrated by above-described embodiment, but it is to be understood that, above-described embodiment is only intended to Citing and the purpose of explanation, and be not intended to limit the invention in described scope of embodiments.In addition people in the art Member can also make more kinds of it is understood that the invention is not limited in above-described embodiment according to the teachings of the present invention Variants and modifications, these variants and modifications are all fallen within scope of the present invention.Protection scope of the present invention by The appended claims and its equivalent scope are defined.

Claims (3)

1. a kind of domestic waste incineration residue processing method, it is characterised in that comprise the steps:
1) sort:Bulk materials are selected by sorting;
2) magnetic separation:Magnetic metal is extracted by magnetic separation;
3) sieve:Particle separation diameter is more than 20mm material, is left the material that particle diameter is less than 20mm, and be 10mm by slot size With 5mm screening plant, particle diameter is sifted out in the material from particle diameter less than 20mm in 10~20mm, 5~10mm and less than 5mm Grain;
4) eddy current separation:Extract the intragranular non magnetic gold that multigroup particle diameter is more than 5mm respectively by eddy current separation Category;With
5) wet-treating:Appropriate recirculated water is added in particle of the particle diameter less than 5mm, and is divided by jigging machine and shaking table Choosing, extracts the nonmagnetic metal in the particle size range.
2. domestic waste incineration residue processing method according to claim 1, it is characterised in that the step 3) is also wrapped Include:
300) organic light thing in material of the particle diameter more than 20mm is removed by selection by winnowing;With
301) material that broken particle diameter is more than 20mm is circulated, until particle diameter is less than 20mm.
3. domestic waste incineration residue processing method according to claim 1, it is characterised in that before the step 1) Also include:
It is temporary:By pending clinker temporary a period of time, so that the moisture content of clinker is maintained at optimization process scope, and make clinker Carbonic acid effect itself occurs, and then stabilizes.
CN201410815012.XA 2014-12-24 2014-12-24 Domestic waste incineration residue processing method CN104624607B (en)

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105195313B (en) * 2015-08-24 2017-07-28 同济大学 The method that metal and combustible are reclaimed from domestic waste incineration residue
CN106082738A (en) * 2016-08-01 2016-11-09 浙江桂森环保科技有限公司 A kind of method utilizing waste incineration slag to manufacture building materials
CN106746820A (en) * 2016-11-16 2017-05-31 南京天合嘉能再生资源有限公司 The production technology that a kind of road engineering slag gathers materials
CN106623353B (en) * 2016-11-16 2019-03-08 小威环境(北京)科技有限公司 Consumer waste incineration slag produces recycled aggregate method
CN109136577A (en) * 2017-06-16 2019-01-04 易门铜业有限公司 A kind of copper smelting slag processing unit and its method
CN108941152A (en) * 2018-06-12 2018-12-07 上海秦望环保材料有限公司 A kind of domestic waste incineration residue circulating water wash pretreating process
CN109402404B (en) * 2018-12-12 2020-05-12 北京科技大学 Method for extracting valuable metal from waste incineration ash

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CN101433880A (en) * 2008-11-07 2009-05-20 倪志群 Method for sorting coal ash

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JP2005155974A (en) * 2003-11-21 2005-06-16 Hitachi Plant Eng & Constr Co Ltd Method and system of treating incinerated ash prior to melting
CN1239276C (en) * 2004-09-16 2006-02-01 上海寰保渣业处置有限公司 Process for producing life garbage incinerator slag aggregate
CN102092975B (en) * 2010-12-08 2013-01-16 浙江工业大学 Method for preparing concrete aggregate from waste incineration ash
CN102284350B (en) * 2011-08-01 2013-09-04 福建耀中建材实业有限公司 Sorting and separation process for utilizing slag comprehensively
CN103752593A (en) * 2014-01-28 2014-04-30 浙江省建筑设计研究院 Process for selecting and recovering heavy metal substances in domestic garbage incineration slag
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