CN1178757C

CN1178757C - Fast and economic comprehensive city domestic refuse treating method

Info

Publication number: CN1178757C
Application number: CNB02147673XA
Authority: CN
Inventors: 韩洪波
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-11
Filing date: 2002-10-11
Publication date: 2004-12-08
Anticipated expiration: 2022-10-11
Also published as: CN1416972A

Abstract

The present invention relates to a rapid and economic method for treating urban domestic refuse in factories, making the urban domestic refuse harmless, reducing the amount of the urban domestic refuse and changing the urban domestic refuse into resources. In the method, firstly, the urban domestic refuse is divided into combustible substance parts, inorganic substance parts, metal parts, easy degrading inorganic substance parts through mechanical sorting, air separation, magnetic separation and artificial selection; secondly, combustible substances are burnt to generate high-temperature smoke used for drying the easy degrading organic substances; and lastly, dried easy degrading organic substances are burnt (can also be used for making fertilizer) to realize thorough amount reduction. Inorganic substances can be buried or used for making building materials.

Description

A kind of quick, economic municipal living refuse comprehensive treatment method

Affiliated technical field

The invention belongs to the MSW processing technology field, be applicable to the needs that different scales Urban Domestic Waste Comprehensive Treatment factory builds.

Background technology

As everyone knows, domestic waste is followed the human civilization progress and is produced, and along with the raising of living standards of the people, its quantity is also increasing rapidly, has become big public hazards.The way of handling domestic waste at present both at home and abroad mainly contains landfill method, burning method and composting process.

The landfill method floor space is big, must do antiseepage and handle, and also will build the methane recovery system and ooze drop liquid treatment plant, easily underground water and surrounding air is polluted, and resource can not be recycled; For populous, China of cultivated land resource growing tension more and more is difficult to implement.

Burning method investment is big, and the operating cost height contains the flying dust difficult treatment of bioxin and heavy metal, although and adopted very advanced and complicated cleaning system, still contain micro-De bioxin in the flue gas and enter atmosphere, polluting environment muchly; The domestic waste water content of China is big, and it is many to contain NaCl, and complicated component, calorific value are low, make the incineration firing temperature low, are easy to generate bioxin and HCl gas, cause environmental pollution and boiler corrosion.

The composting process floor space is big, the time is long, grows mosquitos and flies easily, distributes stench, is difficult to form large-scale production; And the composting production nutrient is low, impurity is many, also contains harmful substances such as heavy metal, and soil and crop are polluted, and is difficult to promote the use of.

Garbage leachate is the high-concentration waste liquid that produces in the rubbish storing process, be characterized in macromolecule organic contamination substrate concentration height, ammonia-nitrogen content height, the concentration of heavy metal ion height of difficult degradation, outward appearance is dark brown and even black, foul smelling, being difficult to carry out biochemical treatment, also is a difficult problem of garbage disposal.

Summary of the invention

Purpose of the present invention be exactly to develop a kind of small investment, take up an area of less, the time is short, operating cost is low, the municipal living refuse comprehensive treatment method of non-secondary pollution, thorough reduction, resource.

Technological process of the present invention: the domestic waste that cram packer ships is at first poured in the rubbish storage pond, with the driving grab bucket rubbish is grabbed then and deliver on the horizontal apron feeder, again through an inclination apron feeder, two platen formula batchers all are adjustable speeds, rubbish is evenly exported, the personnel selection work point picks Bulky Waste, remove bulk heavy rubbish through the spring sorting again, pass through bag-breaking machine then, rotary screen, selection by winnowing, the spring sorting, magnetic separation, manually pick up choosing, domestic waste is divided into the combustible part roughly, the inorganic matter part, metal part (containing battery), the easily biodegradable organics part; Easily biodegradable organics partly dropped in the revolving drier dry; To burn in the incinerator that combustible is partly sent into revolving drier inlet links to each other, the high-temperature flue gas of generation is directly contacted with easily biodegradable organics, with its oven dry by in the air-introduced machine suction revolving drier; Easily biodegradable organics after the oven dry is partly sent into the incinerator burning disposal, also can be used for composting; Garbage leachate is injected revolving drier, and the heat that utilizes high-temperature flue gas is with its evaporate to dryness; But inorganic matter part and incineration residue landfill disposal or be used to make building materials; Metal is partly recycled; The oven dry tail gas that comes out from revolving drier is high altitude discharge after cyclone dust collectors, sack cleaner, deodoriser are handled.

Easily biodegradable organics part in the domestic waste mainly is the kitchen excess, the moisture content height, and perishable smelly, volume is big, and complicated component is the difficult point of Urban Domestic Waste Comprehensive Treatment; All be to consider in the past, but, mostly ended in failure because composting production finds no sale with its compost treatment.The present invention adopts the way of oven dry, and the easily biodegradable organics moisture content is reduced greatly, and volume reduces greatly, and calorific value significantly improves, and helps burning disposal, can also make its sterilization and deodorization; If be used for composting, also help very much screening and pulverizing.Combustible part and easily biodegradable organics partly pass through burning disposal, have realized minimizing completely and stabilisation.

Owing to enter the fuel of incinerator all is to pass through sorting, and the calorific value height contains inorganic matter and metal is few, so just can make to keep higher ignition temperature in the incinerator, burns thoroughly, and smoke pollution is little, and fire grate is not fragile yet.In order to guarantee not produce smoke pollution, in incinerator, be provided with dual firing chamber, wherein be provided with temperature control fuel oil (or gas) burner and secondary wind feedway, guarantee that high-temperature flue gas keeps stopping 2 seconds more than 850 ℃ in dual firing chamber, reach national incinerator standard, can avoid the generation of bioxin.

Along with growth in the living standard, the combustible content in the domestic waste is more and more higher, because its complicated component is difficult to recycle, has only its burning disposal, utilizes its heat, is only economically viable method; The heat that produces is burned in method utilization of the present invention, with unmanageable garbage leachate evaporation, can save the expense of sewage disposal, is to kill two birds with one stone; The richness if heat is also had a surplus can ship the mud that the municipal sewage plant produces oven dry and handle.

1. saved sweat, the processing time shortens greatly, and floor space is also dwindled greatly.

2. directly utilize the heat of incineration flue gas, saved complicated and expensive equipment such as steam boiler, investment and operating cost are reduced greatly, the operation stability of equipment and can handling also raising greatly.

3. simple in structure, cheap, reliable, the technology maturation of revolving drier.

Description of drawings

Accompanying drawing is the flow chart of this technology.

The specific embodiment

As shown in drawings, in one embodiment of the invention, the inventive method comprises: rubbish storage pond, driving, grab bucket, horizontal apron feeder, inclination apron feeder, artificial go-no-go, spring sorting, bag-breaking machine, rotary screen, selection by winnowing, magnetic separation, revolving drier, incinerator, garbage leachate collecting pit, pump.

The domestic waste that cram packer ships is at first poured in the rubbish storage pond, with the driving grab bucket rubbish is grabbed then and deliver on the horizontal apron feeder, again through an inclination apron feeder, two platen formula batchers all are adjustable speeds, rubbish is evenly exported, the personnel selection work point picks Bulky Waste, remove bulk heavy rubbish through the spring sorting again, pass through bag-breaking machine, rotary screen, selection by winnowing, spring sorting, magnetic separation then, domestic waste is divided into combustible part, inorganic matter part, metal part (containing battery), easily biodegradable organics part roughly; Easily biodegradable organics partly dropped in the revolving drier dry; To burn in the incinerator that combustible is partly sent into revolving drier inlet links to each other, the high-temperature flue gas of generation enters in the revolving drier, directly contacts with easily biodegradable organics, with its oven dry; Easily biodegradable organics after the oven dry is partly sent into the incinerator burning disposal; Garbage leachate is injected revolving drier, and the heat that utilizes high-temperature flue gas is with its evaporate to dryness; But inorganic matter part and incineration residue landfill disposal or be used to make building materials.

Claims

1. one kind fast, economic municipal living refuse comprehensive treatment method, it is characterized in that: the domestic waste that cram packer ships is at first poured in the rubbish storage pond, with the driving grab bucket rubbish is grabbed then and deliver on the horizontal apron feeder, again through an inclination apron feeder, two platen formula batchers all are adjustable speeds, rubbish is evenly exported, the personnel selection work point picks Bulky Waste, remove bulk heavy rubbish through the spring sorting again, pass through bag-breaking machine then, rotary screen, selection by winnowing, the spring sorting, magnetic separation, manually pick up choosing, domestic waste is divided into the combustible part roughly, the inorganic matter part, the metal part, the easily biodegradable organics part; Easily biodegradable organics partly dropped in the revolving drier dry; To burn in the incinerator that combustible is partly sent into revolving drier inlet links to each other, the high-temperature flue gas of generation is directly contacted with easily biodegradable organics, with its oven dry by in the air-introduced machine suction revolving drier; But inorganic matter part and incineration residue landfill disposal or be used to make building materials; Metal is partly recycled; The oven dry tail gas that comes out from revolving drier is high altitude discharge after cyclone dust collectors, sack cleaner, deodoriser are handled.

2. integrated conduct method according to claim 1 is characterized in that: the easily biodegradable organics after will drying is partly sent into described incinerator burning disposal, also can be used for composting.

3. integrated conduct method according to claim 1 is characterized in that: garbage leachate is injected described revolving drier, and the heat that utilizes high-temperature flue gas is with its evaporate to dryness.

4. integrated conduct method according to claim 1 is characterized in that: the richness if the burning heat is had a surplus, the mud that the municipal sewage plant produces can be dropped in the described revolving drier, and utilize the heat of high-temperature flue gas that it is dried.

5. integrated conduct method according to claim 1, it is characterized in that: be provided with dual firing chamber in the described incinerator, be provided with temperature control burner and secondary wind feedway in the dual firing chamber, guarantee that high-temperature flue gas keeps stopping 2 seconds more than 850 ℃ in dual firing chamber, reach national incinerator standard.