CN1280887A

CN1280887A - Wet-type pretreating method for life garbage

Info

Publication number: CN1280887A
Application number: CN99114336A
Authority: CN
Inventors: 赵石林; 殷超; 胡宗林
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-15
Filing date: 1999-07-15
Publication date: 2001-01-24

Abstract

A wet-pretreatment process for daily-life garbage includes such steps as breaking garbage in wet condition, separating with water stream, disharging the deposited inorganic substances whose specific weight is higher, recovering floating plastic film, filtering the floating other organic substances to remove water and discharging then, and purifying water for cyclic use. Its advantages include no flying dust, reuse of resource and low cost.

Description

Wet-type pretreating method for life garbage

The present invention relates to a kind of waste disposal method, particularly the pre-treating method that adopts the broken wet concentration of wet type to separate to house refuse.

Since the sixties, dropped into great amount of manpower and material resources both at home and abroad, financial resources are carried out the research of garbage disposal and disposal technology, mainly handling method of disposal has: composting process, burning method, sanitary landfill method and pyrolysismethod.China is a developing country, domestic waste with very big difference is arranged abroad, the one, the inorganic content height, wherein especially based on cinder, metal scraps are seldom; The 2nd, mainly based on the kitchen excess, and paper wherein, the contour hot material of rubber are few in organic class rubbish; But in recent years,, make waste or used plastics film bag account for the 3-4% of rubbish component along with buy vegetables a large amount of uses of disposable plastic bag in the shopping of the continuous development of packing business and city dweller; The 3rd, the most methods that adopt mixed collection of China's municipal refuse, component of refuse complexity.According to statistics, China has more than 500 big-and-middle above city approximately at present, nearly 200,000,000 tons of the annual rubbish that produces.Urban fringe, suburb rubbish spread all over often for most of cities, sewage flows over, mosquitos and flies multiplies, stinks to high heaven, atmosphere, soil, water body environment have been caused severe contamination, the processing of domestic waste directly influences people's living environment and quality of life, influences we descendants's living space.The life refuse processing method that China now adopts generally is a landfill method, though should method is simple, operating cost is lower, the landfill place is difficult to selection, finite capacity, easily produces secondary pollution; And the general burning method that adopts of developed country, its one-time investment and operating cost height, the particularity of China's domestic waste in addition, thereby also should not directly adopt.

The cracking and sorting of rubbish is the dry type cracking and sorting in above-mentioned all processing methods, and the rubbish that is about to collect is directly sent into and carried out fragmentation in the disintegrating machine, and the rubbish after the fragmentation carries out sorting through vibratory sieve, magnetic separator etc. again; Because rubbish is through the dry type cracking and sorting, thereby stirs up a cloud of dust, stink to high heaven during work, environmental sanitation personnel's working environment is very abominable, and the waste or used plastics film bag that accounts for rubbish component 3-4% can not sort out, and is recycled; If with its landfill, bulky, and be stale-proof in its 50 years, become white pollution; If it is burned, then produce a large amount of flue gases, serious especially pollution environment.As with manually separating plastic being come out, the work measurer is big, and sorting is not thorough, and the waste or used plastics that sub-elects is dirty too, can recycle after needing to clean.

The object of the present invention is to provide a kind of defective that dust flies upward, stinks to high heaven when avoiding refuse breaking, and can reclaim the rubbish pre-treating method of waste or used plastics film bag, to overcome the weak point of existing dry type cracking and sorting.

Technical solution of the present invention is: rubbish is carried out fragmentation under moistening condition, the washing that rubbish after fragmentation is delivered to the broken wet concentration device of wet type divides in the scavenger, utilize current to wash sorting, the inorganic matter fragment that proportion is bigger sinks at the bottom of the pond, discharges through slag extractor; The organic matter fragment that proportion is lighter is suspended in the water surface, and waste or used plastics film bag wherein reclaims through recovering mechanism, and remaining organic matter fragment is then discharged behind drainage; Wet concentration divides the interior sewage of scavenger after purified treatment, sends into washing again and divides scavenger to recycle.

The present invention compared with prior art, have the following advantages: at first, because of the fragmentation of house refuse be sorted under the moistening condition He in the water and carry out, avoided dust to fly upward and the stench phenomenon, stinking smell assaulting one's nostrils to have changed the conventional garbage disposal field, sewage crossing current, the horizontal adverse circumstances that fly of mosquitos and flies have been improved environmental sanitation personnel's condition of work; And aqueous medium is all recycled after treatment, reaches zero-emission, thereby non-secondary pollution.Secondly,, avoided the wasting of resources and white pollution, reduced the operating cost of garbage disposal because waste or used plastics film bag is recycled.

Description of drawings:

Fig. 1 is the structural representation of the house refuse wet separation processor that the embodiment of the invention adopted;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the process chart of the embodiment of the invention.

At first house refuse wet separation processor of the present invention is described below in conjunction with accompanying drawing:

House refuse wet separation processor mainly divides scavenger 2, mucking machine 13, plastics recovery mechanism, rotation drainage grid and water pipe 11 to form by disintegrating machine 1, washing; Washing divides scavenger 2 to be separated into washing pool 3 and sewage collecting storehouse 7 by the swash plate 4 of factory's font dividing plate; The horizontal deflector 5 half of factory's font dividing plate covers sewage collecting storehouse 7, and laterally the space of deflector plate 5 tops forms sorting groove 6.Be equipped with in the washing pool 3 partly to be dipped in and get rid of chip disintegrating machine 1 in the water, the bottom of washing pool 3 is provided with and rotates the slag gathering hopper 12 that military mucking machine 13 links to each other.The plastics recovery mechanism that constitutes by motor 19, rotating shaft 10, rotating band 9 and rake teeth 8, its annular rotating band 9 is placed in two rotating shafts 10, being provided with 16 groups, every group on the rotating band 9 equably is the rake teeth 8 of the six roots of sensation, rotating shaft 10 links to each other with motor 19, plastics recovery mechanism is inclined to set, one end of a rotating shaft 10 places in the sorting groove 6, and another root rotating shaft 10 places washing to divide outside the scavenger 2, and should hold higher; Above the end of horizontal deflector 5, the water level in sewage collecting storehouse 7 below the plastics recovery mechanism, be provided with the rotation drainage grid that motor 14, water strainer 16 and rotating shaft 15 constitute, its annular filter network of rivers 16 is placed in two rotating shafts 15, rotating shaft 15 links to each other with motor 14, and an end that rotates the drainage grid and the slag notch 20 of sewage collecting storehouse 7 one sides be communications and liaison mutually.External High-Pressure Water in water pipe 11 is connected to washing pool 3, forms the impact current that impact, wash broken back house refuse by water intaking valve 17.Sewage drains in the external sewage disposal device after the purified treatment by draining valve 18, recycles for this machine through water intaking valve 17 by outer water pump again.

During work, house refuse is transported to carries out fragmentation in the disintegrating machine 1, owing to disintegrating machine 1 half is dipped in the water, thereby becomes the wet type fragmentation.Rubbish after fragmentation falls in the washing pool 3, wash by the impact current that external High-Pressure Water provides, to make the heavier inorganic matter of proportion in the rubbish be main rubbish fragment as fragment of brick, stone, ironware, glass, coal quarrel etc., sink to the bottom of washing pool 3, discharge outside the pond through mucking machine 13 by slag gathering hopper 12; Through the lighter various organic matter fragments of the proportion after the fragmentation then under the band at current, from washing pool 3 overflows into rinsing bowl 6 on the horizontal deflector 5.The plastic film bag that is fractured into strip draws in through the rake teeth 8 of the plastics recovery mechanism of rotation, and takes the water surface out of, discharges outside the washing sorting pond 2 with it, is recycled.Other organic matter rubbish fragment then overflows into from horizontal deflector 5 on the water strainer 16 of the drainage grid that rotates 7 tops, sewage collecting storehouse with current, on one side drainage, discharge outside the pond through slag notch 20 with the water strainer 16 that rotates on one side.Sewage in the sewage collecting storehouse 7 drains in the external sewage disposal device after the purified treatment through draining valve 18, supplies water through water intaking valve 17 by external water pump and washes branch scavenger 2 and recycle.According to the needs of washing branch scavenger 2, can add water and replenish.

Now to handle 100 tons of house refuses day as embodiments of the invention, its concrete Wet-type pretreating method step is as follows:

1. the house refuse collected by conventional method of wet type fragmentation, be sent in the broken water machine of wet type through ribbon conveyer, get rid of chip disintegrating machine 1 with the rotation of 1200 rev/mins rotating speed, make and load the plastic foil film broken bag that is equipped with class rubbish, and the inorganic matter refuse breaking of bulk become fragment, the organic matter rubbish of bulk as: waste paper, watermelon peel, dish skin, plastic bottle or the like are broken into fragment, and plastic film bag is because himself toughness is fractured into ribbon.Rubbish after the fragmentation falls into the washing of getting rid of chip disintegrating machine below and divides in the washing pool 3 of scavenger 2.

2. the rubbish after washing separation inorganic matter is broken falls in the washing pool 3, flushing current that provide by water pipe 11 and stir current, its flow is 200 tons/hour, wash stirring, proportion bigger based on the rubbish fragment of inorganic matter as: metal, brick and tile, glass, coal quarrel, bone etc. are deposited to the bottom of washing pool 3, and pass through slag gathering hopper 12 and discharge through mucking machine 13, inorganic matter is about 40 ton per days; And after fragmentation the lighter various organic matter fragments of proportion, then under the drive by current, enter in the sorting groove 6 through horizontal deflector 5.

To be worth higher metal, glass equal size just lower originally owing to recycle in China's domestic waste, in addition the purchase of waste recovery department and " glass rot king " spontaneous recovery, so its content is just lower.Isolated inorganic matter fragment also can be made fragment of brick or other building materials, or be made landfill disposal after machinery such as magnetic separator or artificial separation go out metal, glass etc.

3. washing separating plastic film bag is fractured into rake teeth 8 seizure with 300 meter/minute linear speed rotations of the plastic film bag of strip through plastics recovery mechanism, plastic film bag " is grabbed " on rake teeth 8, and take the water surface out of, discharge outside the washing sorting pond 2 with it, reclaimed, the yield of plastic film bag is about 3 ton per days.The plastic film bag that reclaims can be existing the price of 800-1000 unit/ton send regenerated plastics factory, goods such as production regenerated plastics, plastic grain, fiber, or be used to make fuel such as gasoline, kerosene.

And other organic matter rubbish fragment, overflow on the water strainer 16 of the drainage grid that rotates 7 tops, sewage collecting storehouse from horizontal deflector 5 with current, one side drainage, discharge outside the pond through slag notch 20 with the water strainer 16 that rotates on one side, be transported to through ribbon conveyer and carry out press dewatering in the squeezer, the organic matter rubbish after the dehydration is sent into and is carried out burning disposal in the incinerator.The sewage that produces in the press dewatering process returns in the cesspool, so that re-use after the purified treatment.Burn the waste or used plastics film that the waste heat that is produced can be used for drying recovery; Ash quarrel after the burning is used for brickmaking or makes landfill disposal.

Organic matter rubbish fragment behind the drainage also can directly be made compost or landfill disposal.

4. the sewage in the purified treatment cesspool 7 of sewage enters by draining valve 18 and carries out purified treatment in the effluent treatment plant, and the water supply of purification back is washed branch scavenger 2 and recycled.

The higher sewage of concentration can at first enter makes the natural pond processing in the system fen, and the waste heat that utilizes burning to be produced carries out catalysis; It is combustion-supporting that the biogas that is produced can flow to incinerator.Through purified treatment handled after, washed branch scavenger 2 recycle again by water supply for system natural pond waste water.

Claims

1. wet-type pretreating method for life garbage, it is characterized in that: rubbish is carried out fragmentation under moistening condition, the washing that rubbish is delivered to wet military broken water concentrator after fragmentation divides in the scavenger, utilizes current to wash sorting, heavy inorganic matter fragment sinks at the bottom of the pond, discharges through slag extractor; The organic matter fragment of light specific gravity is suspended in the water surface, and wherein waste or used plastics film bag reclaims through recovering mechanism, and remaining organic matter fragment then separates behind drainage discharges; Washing sewage that sorting produced supplies water and washes the branch scavenger and recycle after purified treatment.