CN102175026A

CN102175026A - Garbage burning pretreatment process

Info

Publication number: CN102175026A
Application number: CN 201010603354
Authority: CN
Inventors: 吴孔根
Original assignee: GUANGZHOU XW ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Priority date: 2010-12-23
Filing date: 2010-12-23
Publication date: 2011-09-07
Anticipated expiration: 2030-12-23
Also published as: CN102175026B

Abstract

The invention provides a garbage burning pretreatment process. Garbage is subjected to multiple steps of mechanical rough sorting, manual fine sorting, rough crushing, fine crushing and the like; the garbage treatment is simplified in a mode of increasing density and reducing volume; daily garbage is cleared every day, the storage capacity is effectively reduced, the capacity of the conventional landfill is increased by over 5 times, and the heat value of the garbage treated by the process can be stabilized at over 850 degrees; toxic and harmful substances such as dioxin, furan and the like are avoided; the operating cost is reduced by using burning waste heat for drying, waste and old materials are furthest recycled, rich organic fine materials are composted or used for preparing marsh gas, and the residues without utilization value are burnt and used for generating power to increase the benefits; innocuity, decrement, stabilization and recycle are achieved; the operating cost is reduced, and the secondary pollution is reduced; and economic benefit, social benefit and resource benefit are greatly improved.

Description

Waste incineration pre-process technology

Technical field

The present invention relates to a kind of garbage treating process.

Background technology

Progress along with expanding economy and society; urban population sharply increases; the quantity of all kinds of rubbish also linearly rises; especially house refuse will increase with annual 5% to 6% ratio; house refuse " besieged city " predicament is close at hand, and rubbish has become the especially big difficult problem of current town development of puzzlement and environmental protection.

For this reason, the mode one that people take is that rubbish is burned, but the essence of waste incineration all is oxidation reaction, when various living beings are burned, various harmful substances also produce simultaneously, dislike the heroic spirit body for two mouthfuls that especially are difficult to stop, and the environmental hazard that its suspension toxin buildup causes is very big, the most serious is that poisonous suspension enters food chain, very harmful to human body.

Mode two is to set up refuse landfill, but refuse landfill needs the land occupation area, but land area is very precious and limited in this day and age, the quantity of rubbish then is cumulative, refuse landfill always has one day that is finished by landfill, and building refuse landfill in a large number is not long-term plan.

On the other hand, people are are constantly researching and developing biodegradation technique, but present biodegradation technique is not also realized important breakthrough, just local input test among a small circle, and the input of biodegradation technique is up to billions of units, and biodegradable range of application also has sizable limitation.

Summary of the invention

Defective and deficiency that purpose of the present invention exists at prior art just propose the preposition treatment process of a kind of waste incineration.Make rubbish through this PROCESS FOR TREATMENT just refuse thermal value be stabilized in more than 850 degree, avoid producing two mouthfuls and dislike poisonous and harmful substances such as English, furans; Utilize the waste gas of incineration drying, reduce operating cost.

For achieving the above object, technical scheme of the present invention comprises the steps:

A, rubbish concentrated be transported to totally enclosed discharging place and stack, collect the penetrating fluid sewage of rubbish in its stacking, and rubbish is carried out mechanical ragging with excavator, screening machine, and according to gravity principle rubbish is carried out broken bag, screening, separation respectively, sieve out solid refuse and liquid refuse;

B, the penetrating fluid sewage transport among the step a to Sewage Disposal purification or fertilizer treatment or biogas extracted, the solid refuse that sieves out manually segments choosing in the process that belt conveyor is carried, the liquid refuse of sieving out is then carried out fertilizer treatment or biogas and extracted;

C, will sieve into through artificial fine-sorted solid refuse and recyclablely utilize rubbish and can not recycle rubbish, can not recycle rubbish and carry out coarse crushing, under the pressure of 25MPa, compress then, make the volume weight that can not recycle rubbish reduce to 1---1.35m ³Thereby, can not recycle rubbish and in the crowded process of pressurized, can overflow its unnecessary sewage and produce compression liquid, discharge behind the compression liquid not the moisture content of recyclable rubbish and reduce to below 35%;

Compression liquid among d, the step c is transported to sewage treatment plant's processing or carries out biogas and extract and fertilizer treatment, solid refuse after the compression then is delivered in dry kiln or the wind-heat kiln or the drying processing is carried out in spontaneous fermentation, and the moisture content that can not recycle rubbish is reduced to below 18%;

E, dried solid refuse is sieved once more, with wherein fritter rubbish directly as the fuel of burning electricity generation, lime-ash after its burning is as cement auxiliary material, bulk rubbish then carries out fine crushing, the rubbish particle diameter of fine crushing is controlled at below the 20mm, again the rubbish behind the fine crushing is mixed stirring with the mud of handling through press filtration in advance, make the fuel finished product, realize harmless treatment through rolling and forming machine.

The further technical measures of the present invention are: the described excavator of step a is two-way grab excavator, and screening machine is the drum-type screening machine.

The present invention compared with prior art has following obvious improvement and outstanding characteristics:

1---need not set up the bulky refuse field, can directly utilize the landfill storage capacity of conventional garbage field to carry out every processing step of waste incineration pre-process, rubbish is accomplished that daily output day is clear, effectively reduce storage capacity, prolong the existing landfill time more than 5 times, and reduce the substantial contribution input, can make the harmfulness of various poisonous and harmful substances reduce to minimum again.

2---the maximized waste and old material that carries out of the present invention is recycling, and abundant organic fines carries out compostization or producing methane, and the residue of no value is carried out burning electricity generation increase benefit again.Accomplish " innoxious, minimizing, stabilisation, resource ", reduce operating cost, reduce secondary pollution, increase economic efficiency widely, social benefit and economy of resources.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is a process chart of the present invention.

The specific embodiment

With reference to shown in Figure 1, the rubbish collected concentrated be transported to fully closed dumping ground, the rubbish of this moment is before processing, the material of various big smallclothes exists wherein, disorderly and unsystematic, carry out mechanical ragging then, picking up aniseed rubbish with two-way grab excavator sorts out, with the bulk foreign material, as wood, fragment of brick is picked out and is convenient to recycling, the rubbish of residue is sent into the drum-type screening machine and is carried out broken bag screening separation, isolate solid refuse and liquid refuse according to gravity principle, meanwhile, solid refuse and liquid refuse are through the electromagnetism automatic screening, filter out the magnetic metal material, the liquid refuse of then sieving out together is delivered to the Sewage Disposal purified treatment together with the penetrating fluid sewage of dumping ground, make it reach discharging standards, perhaps be used for fertilising, biogas extracts, the solid refuse that sieves out manually segments choosing in the process that belt conveyor is carried, promptly divide to hank and to recycle rubbish and the recyclable rubbish that utilizes, by manually sub-electing the plastics that still have recovery value, paper product, cloth, leather, rubber, glass etc., recyclable thus waste and old material is more than 20%.

Again the above-mentioned rubbish of can not recycling is transported to disintegrating machine and carries out two roller roll-in fragmentations, the purpose of roll-in fragmentation is to reduce the moisture content of rubbish, improve the combustion heat value of rubbish unit, further decrement subtracts appearance, better for doing preposition preparation below the reduction of the flow process compression once msw water content to 35%.

Can not recycle rubbish is transported to full-automatic refuse compaction equipment through screening after magnetic separation, artificial separation and the crusher in crushing and compresses, adopt the above high pressure compressed technology of 25MPa, moisture content in the rubbish is discharged in a large number, msw water content is reduced to below 35%.The penetrating fluid of compression in the discharging garbage is 8 to 10m ³/ ton (rubbish).Utilize pressure that rubbish moisture content is reduced, improve refuse thermal value greatly, reduce and burn operating cost, be convenient to burning electricity generation.Or be transported to burning disposal such as burning electricity generation factory, steam power plant, cement plant with compressing baling press packing.Compression back density increases, and volume reducing is than weighing 1 to 1.35.It is fabulous to compress the compression liquid biochemical property that, and can carry out the biogas extraction and application or enter the water quality that sewage treatment plant's purified treatment becomes to meet qualified discharge through sewage network.

The rubbish of can not recycling after the compression is transported to that to carry out wind-heat in the dry wind kiln dry or with stacking the natural seasoning drying of fermenting, make and to recycle msw water content and further be reduced to below 18%, rubbish is through being dried to below 18% and can directly burning, the incineration firing calorific value just is stabilized in more than 850 degree, stops two mouthfuls of poisonous and harmful substances such as evil English furans and produces.Guarantee incineration treatment of garbage technology non-secondary pollution, directly as the fuel of burning electricity generation, the lime-ash after its burning is as cement auxiliary material for dried solid refuse.Or dried rubbish then carried out fine crushing, the rubbish particle diameter of fine crushing is below 20mm, again rubbish is mixed stirring with the mud of handling through press filtration in advance, making the fuel finished product through rolling and forming machine, is burning electricity generation factory, cement plant, energy power plant, the indispensable environmental protection new forms of energy of Industrial Boiler.

The present invention adopts closed factory building production, is to adapt under the town and country land resource state in short supply best disposal of refuse scheme.Subtract appearance by density and realize rubbish storage capacity decrement and reduce the landfill land used, prolong the planning landfill time limit, reduce taking of land resource greatly.

Above content is in conjunction with further describing that concrete main embodiment is done, and can not assert that concrete enforcement of the present invention is confined to these explanations.Those skilled in the art without departing from the inventive concept of the premise, some other technology of done accurately, the deduction or replace that beautify, all should belong to protection scope of the present invention.

Claims

1. a waste incineration pre-process technology is characterized in that, may further comprise the steps:

C, will sieve into through artificial fine-sorted solid refuse and recyclablely utilize rubbish and can not recycle rubbish, can not recycle rubbish and carry out coarse crushing, under the pressure of 25MPa, compress then, make the volume weight that can not recycle rubbish reach 1---1.35m ³Thereby, can not recycle rubbish and in the crowded process of pressurized, can overflow its unnecessary sewage generation compression liquid, msw water content is reduced to below 35%;

E, dried solid refuse is sieved once more, with wherein fritter rubbish directly as the fuel of burning electricity generation, lime-ash after its burning is as cement auxiliary material, bulk rubbish then carries out fine crushing, the rubbish particle diameter of fine crushing is below 20mm, again rubbish is mixed stirring with the mud of handling through press filtration in advance, make the fuel finished product, realize harmless treatment through rolling and forming machine.

2. waste incineration pre-process technology according to claim 1 is characterized in that: the described excavator of step a is two-way grab excavator.

3. waste incineration pre-process technology according to claim 1 is characterized in that: the described screening machine of step a is the drum-type screening machine.