CN1586745A - Process for producing life garbage incinerator slag aggregate - Google Patents

Abstract

The present invention relates to the treatment of life garbage incinerating slag, and especially the production process of regenerating treatment of the incinerating slag to form building aggregate. The production process includes the following steps: feeding material, magnetically selecting to eliminate iron, sieving, wind selecting, crushing, slaking, and electric eddy current sorting. Through the serial physical and chemical treatment, the life garbage incinerating slag is re-used, and the present invention raises the environment protecting level effectively.

Description

The production technology of life garbage incinerator slag aggregate

Technical field:

The present invention relates to the treatment process of a kind of house refuse gained slag after burning disposal, finger is treated to production technology of gathering materials for building with this slag through regeneration especially.

Background technology:

At first provide following term definition:

Domestic waste incineration residue is meant the house refuse slag that its fire grate is discharged down after incinerator burns.

Slag gathers materials, and is meant that domestic waste incineration residue is through gathering materials of obtaining after the processing.

The domestic rubbish disposal level in current city has become the comprehensive sign of urban civilization degree of reflection, economic strength, scientific and technological level, city management ability.The burning disposal of domestic waste is the effective means of domestic and international domestic rubbish disposal, at present, along with the development of urban economy and the demand of society, has built increasing municipal solid waste incinerator.When house refuse is handled on municipal solid waste incinerator mass efficient ground, brought the subsequent treatment problem of domestic waste incineration residue also.

Present existing domestic waste incineration residue treating method just adopts simple land-fill method to carry out.But this method not only accounts for the soil but also be unfavorable for environmental protection, and is in short supply in land resource, today that environmental requirement is more and more higher, adopts the mode of landfill outdated.

Summary of the invention:

Technical problem to be solved by this invention just is to overcome the deficiency of domestic waste incineration residue landfill disposal in the prior art, provides a kind of slag is treated to production technology of gathering materials for building through regeneration.

Show after deliberation, generally speaking, slag mainly comprise following composition:

Physical composition:

Form by slag, pottery, masonry fragment, stone, glass, metal and combustible.

The distribution situation of particle diameter:

65% of particle is distributed in 2～50mm, greater than accounting for about 10% of 50mm, less than accounting for about 25% of 2mm.

So but after having removed combustible, metal object and the suitable sorting of process in the slag, then be easy to form intensity.

Chemical property:

Main element constitutes:

Si, Al, Ca, Fe, C, K, Mg are the main components of slag.

Mineral composition:

Be mainly SiO ₂, Al ₂O ₃, SiO ₄, Al ₂Si ₂O ₅The chemical property of slag is more stable, illustrates that its durability is better.

On this basis, concrete scheme provided by the invention is as follows, and a kind of production technology of life garbage incinerator slag aggregate comprises the steps:

1), charging, adopt belt feeder to transmit the slag of required processing

2), the magnetic separation de-iron, with slag by magnetic separation, the separating ferrum goods;

3), screening, will sieve through the slag after the de-iron processing;

4), selection by winnowing, with the oversize of above-mentioned screening through the winnowing machine selection by winnowing;

5), fragmentation, the oversize large particulate matter in the slag after the screening is carried out fragmentation, and once more through above-mentioned steps 2) circulation screening handles;

6), clear up, the screenings after screening is handled imposes to be cleared up agent and clears up NO _x

7), eddy current separation, the nonferrous metal in the slag is separated, promptly gathered materials.

Following mask body is launched above-mentioned production technology:

1) charging is that the slag after the burning disposal is shoveled slag into feed hopper by forklift or miscellaneous equipment through being transported to the scene of processing, generally adopts electronic transport tape transmission.

The equipment that adopts comprises: common forklift, conveyer belt, motor.

Technologic requirement: discharging evenly, unload slowly, institute joins barrier and can not arbitrarily change in the feed hopper.Generally belt feeder speed is controlled at 0.8～1.2m/s, thickness of feed layer is at 100～150mm.

2), the magnetic separation de-iron, be the magnetic of utilizing delivery roller, the ferrous metal material is adsorbed on the feed belt.In feed belt bottom scraper is set it is scraped, finish separating of ferrous metal and waste incineration slag.

The equipment that adopts comprises: magnetic rollers (generally greater than 4000GS high-performance magnetism system), conveyer belt, motor, scraper.

Technologic requirement: not only want and can separate the bulk ferrous metal, also want and can the thin iron particle in the slag be separated, the de-iron rate will reach more than 90%.

3), screening, be with the slag after handling through de-iron, the inertia by conveyer belt directly enters and rotates sieve and sieve, the different size needs that the slag of producing according to design in advance gathers materials, the size diameter of adjustable knotter screen net is to obtain needed screenings.Screenings is entered into next stage to be handled.

The equipment that adopts comprises: conveyer belt, motor, vibratory sieve (screen cloth is adjustable) screen cloth scope are at 10 * 10～20 * 20mm.

Technologic requirement: keep the unobstructed of sieve aperture.

4), selection by winnowing, be to be connected the process that screening is handled.Selection by winnowing handle to as if the oversize of screening process, mainly comprise the material of big particle diameters such as some fragments of brick, pottery, useless cloth and plastics.By conveyer belt it is transported to winnowing machine, the separating substances such as light property material such as cloth, polybag and fragment of brick pottery of will giving up come, can adopt put the fixed storage warehouse into and collect after, transport incineration plant back and burn.Large particulate matter wherein enters break process technology.

The equipment that adopts comprises: conveyer belt, motor, winnowing machine.

Technologic requirement: the slag after selection by winnowing is handled, wherein the clearance of light thing will reach greater than 85%, and the exit flow speed of winnowing machine should be controlled at 15～25m/s.

5), fragmentation, be to utilize disintegrating machine that the large particulate matter in the slag is carried out fragmentation, broken back enters the screening processing procedure once more by the conveyer belt transmission.Influence of noise surrounding environment for preventing to send in the disintegrating machine processing procedure can increase shock-absorption.

The equipment that adopts comprises: disintegrating machine, conveyer belt, motor, shock-absorption.

Technologic requirement: the control charging rate is less than 1500Kg/h, and discharging-material size is less than 25mm.

6), clear up, be that screenings after screening is handled imposes and clears up agent and clear up NO _x, remove the peculiar smell in the slag.

The equipment that adopts comprises: automatically liquid filler, clear up agent.

Technologic requirement: material water ratio is less than 15% behind the liquid feeding.

7), eddy current separation, be to utilize the vortex flow principle that the nonferrous metal in the slag is separated.After by difference (conductance/density) coefficient of analyzing slag and contained nonferrous metal thereof, utilizing high magnetic is the permanent-magnet eddy current separator, and the nonferrous metal in the slag is carried out sorting, is promptly gathered materials.

The equipment that adopts comprises: flat eddy current separator.

Technologic requirement: the control material is by speed 0.5～1.0m/s.Nonferrous metal clearance in the slag is reached more than 85%.

Structure member with regard to flat eddy current separator is described below below:

Please, as shown in the figure, comprise vortex flow flat board 1, belt feeder 2, center bearing bracket 3, nonferrous metal bunker for collecting 4 referring to Fig. 2.Vortex flow flat board 1 places the below of belt feeder 2, and slag is passed through by the top of belt feeder 2, and nonferrous metal is pushed into the nonferrous metal bunker for collecting 4 on next door and is collected.At dull and stereotyped 1 center of vortex flow one center bearing bracket 3 is installed, belt feeder 2 is connected with vortex flow flat board 1.

Wherein, vortex flow flat board 1 is made up of with the electromagnetism that becomes miter angle to distribute with dull and stereotyped vertical direction magnet plates.By the S of conversion magnetic pole, the orientation of the N utmost point, make in the electric conductor by its top and produce eddy current, thereby be subjected to thrust; Belt feeder 2 passes through the belt feeder charging, and can control the speed of charging simultaneously; Center bearing bracket 3 can be regulated the angle of vortex flow flat board, to obtain best separating effect; Nonferrous metal bunker for collecting 4 is used to collect the material that is sorted out.

The using method of this flat eddy current separator is: substituting produces electric current in the magnetic field that changes, and electric current is when making cutting magnetic line movement, the effect that will produce power.By this principle, use the vortex flow flat board nonferrous metal in the slag is separated.

Simultaneously, can adjust the angle of the magnetic line of force by the center bearing bracket on the flat board, control the speed of slag stream simultaneously by the speed of regulating belt feeder, both combinations can obtain best separating effect.

Effect of the present invention:

The present invention is by carrying out series of physical, chemical treatment to the slag that is produced behind the consumer waste incineration, through magnetic separation, selection by winnowing, eddy current separation, sterilization, fragmentation, classification, formed the production technology of a cover integrated treatment domestic waste incineration residue, can produce for building of cooperation and gather materials.Not only remove the processing of landfill from, saved the expense of soil and landfill, and can make the slag regeneration again, effectively improved the level of urban environmental protection.

Description of drawings:

Fig. 1: the technological process of production figure of life garbage incinerator slag aggregate of the present invention.

Fig. 2: flat eddy current separator structural representation of the present invention.

The specific embodiment:

Embodiment 1:

Concrete scheme production technology following steps:

1), charging, adopt belt feeder to transmit the slag of required processing

2), the magnetic separation de-iron, with slag by magnetic separation, the separating ferrum goods;

3), screening, will sieve through the slag after the de-iron processing;

4), selection by winnowing, with the oversize of above-mentioned screening through the winnowing machine selection by winnowing;

5), fragmentation, the oversize large particulate matter in the slag after the screening is carried out fragmentation, and once more through above-mentioned steps 2) circulation screening handles;

6), clear up, the screenings after screening is handled imposes to be cleared up agent and clears up NO _x

7), eddy current separation, the nonferrous metal in the slag is separated, promptly gathered materials.The equipment that adopts is as follows:

Device name	Model	Function
			The de-iron device	Φ650L1000	Scum separates
Vibratory sieve	2LZS-1452	The slag classification
			Separator	The horizontal combination	Light thing separates
Disintegrating machine	7000×1000	Slag is pulverized
			Digesting equipment	Liquid spraying	Slag is cleared up
Scraper	The 3L bucket type	The charging operation
			Eddy current separator	Flat eddy current separator	Nonferrous metal separates

Claims (1)

1, a kind of production technology of life garbage incinerator slag aggregate is characterized in that comprising the steps:

1), charging, adopt belt feeder to transmit the slag of required processing;

2), the magnetic separation de-iron, with slag by magnetic separation, the separating ferrum goods;

3), screening, will sieve through the slag after the de-iron processing;

4), selection by winnowing, with the oversize of above-mentioned screening through the winnowing machine selection by winnowing;

5), fragmentation, the oversize large particulate matter in the slag after the screening is carried out fragmentation, and once more through above-mentioned steps 2) circulation screening handles;

6), clear up, the screenings after screening is handled imposes to be cleared up agent and clears up NO _X

7), eddy current separation, the nonferrous metal in the slag is separated, promptly gathered materials.

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