CN1272573C

CN1272573C - Method for treating domestic garbage through steam pyrolysis

Info

Publication number: CN1272573C
Application number: CN 200410024406
Authority: CN
Inventors: 王紫堃; 张晓茂
Original assignee: Individual
Current assignee: Wang Zikun
Priority date: 2004-06-23
Filing date: 2004-06-23
Publication date: 2006-08-30
Anticipated expiration: 2024-06-23
Also published as: CN1594979A

Abstract

The present invention discloses a method for pyrolyzing and treating municipal domestic garbage by using high-efficiency steam. In the method, a steam pyrolyzing technology is adopted, and garbage is placed in a pressure container tank to be pyrolyzed; the garbage is treated with heat preservation for 0.5 to 1.5 hours under the conditions of the steam temperature of 200 to 250 DEG C and the pressure of 1.6 to 2.5MPa; then the temperature falls to 120-150 DEG C, and the garbage is puffed and sprayed in a garbage collecting bin under the condition of the pressure of 0.2 to 0.5MPa; the garbage is sorted to form combustible substances, puffing agricultural use clay, etc. By using the method, the efficiency of garbage treatment is effectively increased, and the innocent treatment for garbage is thoroughly realized. Further, quantitative reduction and resource recovery are achieved.

Description

The steam pyrolysis facture of domestic waste

Technical field

The present invention relates to administer the technology of municipal pollution aspect, relate to a kind of steam pyrolysis facture of domestic waste specifically.

Background technology

The mode of handling house refuse both at home and abroad generally has: three kinds of methods such as sanitary landfills, burning, composting.Three kinds of methods all exist a lot of problems, for example sanitary landfills need take a large amount of soils, and be difficult to accomplish resource reutilization and avoid secondary pollution, the burning method investment is big, payoff period is long, and technology is very unripe both at home and abroad, the organic resource of the recyclable part of composting, but at first need organic matter in the rubbish and inorganic matter are separated, and content of organics there is requirement, because the still unexecuted categorised collection of China's municipal refuse, it is a difficult problem that original mixed rubbish is carried out sorting always, and the primary composting of sorting is difficult to avoid causing secondary pollution.Chinese patent by retrieval, adopt the patent of invention of high-temperature steam technical finesse rubbish few, for example: application number 981028675,98117233.4,00120763.6,00124817.0,01107176.1,02135869.9, though these patented technology schemes have solved the existing problem of parts of traditional landfill method, burning method and composting process, owing to exist problem on selected steam pyrolysis related process parameter, treatment effect is not ideal enough, particularly temperature lower (temperature t＜200 ℃) makes treatment effect and treatment effeciency be subjected to very big influence.

Summary of the invention

Purpose of the present invention is intended to overcome the weak point of above-mentioned prior art, provides a kind of pyrolysis effective, handled thing recycle value height, the steam pyrolysis facture of garbage disposal outstanding effect domestic waste.

Technical scheme of the present invention is: a kind of steam pyrolysis facture of domestic waste, characteristics are, diameter or length are less than the primary domestic waste of 300mm, the calcium lime powder that mixes the 1-10 kilogram per ton, send in the pressure volume pot by conveyer, feed saturated vapor then it is carried out pyrolysis, make steam and rubbish temperature in the pressure volume pot reach 200-250 ℃ in confined conditions, pressure 1.6-2.5MPa kept this temperature 0.5-1.5 hour, then cooling, pumping equipment is got rid of pot liquid at the bottom of opening simultaneously jar, when being cooled to 120-150 ℃, pressure 0.2-0.5MPa opens discharge device, make that jar interior rubbish is expanded to be spurted to collecting bin, the pressure volume pot discharge gate be a 10-50 rice to distance between the collecting bin, and the interior expanded rubbish of collecting bin is sent to that screening machine sieves and magnetic separation, after the screening expanded agricultural soil is used for agricultural or urban afforestation, combustible burns with incinerator, brick, inorganic matters such as tile fragment carry out landfill, and the iron in the magnetisable material is recycled, and battery etc. are handled separately.

The present invention compared with prior art, have substantial characteristics and obvious improvement: because steam pyrolysis temperature height, pressure that the present invention selectes are big, not only help decomposing the partial organic substances matter in the rubbish, and various germs thoroughly can be killed, effectively reduce the refuse pollution degree; Moreover, the present invention has adopted the expanded technology of spurting, not only some organic substances in the handled thing can be become extruded body directly recycles, and the moisture in the handled thing is obviously reduced, handled thing after the pyrolysis can be scatter, help the screening and the magnetic separation operation of back, production efficiency significantly improves; Utilize process disposal of refuse of the present invention, the handled thing recycle value significantly improves, and has thoroughly realized innoxiously, has further reached minimizing and resource, and the garbage disposal effect is obvious, has saved a large amount of land resource.

Below in conjunction with drawings and Examples, the present invention is further explained explanation.

Description of drawings

Fig. 1-process flow diagram of the present invention;

Fig. 2-process equipment horizontal layout schematic diagram of the present invention;

The A-A generalized section of Fig. 3-Fig. 2;

The B-B generalized section of Fig. 4-Fig. 2.

The explanation of accompanying drawing drawing:

1 rubbish warehouse, 2 apron feeders, 3 belt conveyors, 4 batchers, 5 pressure volume pots, 6 sealing devices, 7 pumping equipments, 8 discharge devices, 9 magnetic separators, 10 apron feeders, 11 belt conveyors, 12 screening machines, 13 belts sieve, 14 belt conveyors, 15 graters, 16 patrol and examine platform, 17 magnetic separators, 18 collecting bins, 19 expanded.

Specific embodiments

Referring to Fig. 1-Fig. 4, domestic waste is shipped by vehicle, pour in the rubbish warehouse 1, ratio with the 1-10 of mixing kilogram calcium lime powder per ton adds an amount of calcium lime powder, calcium lime powder plays catalyst, help organic decomposition, the bottom of rubbish warehouse 1 is provided with apron feeder 2, apron feeder 2 evenly adds belt conveyor 3 with the crude waste in the warehouse, belt conveyor 3 with mass transport to the batcher 4 above the steam pressure container tank 5, batcher 4 is given each steam pressure container tank 5 feed successively, after pressure volume pot 5 is filled, airtight good material loading sealing device 6, in jar, feed saturated vapor, reach temperature 200-250 ℃, behind the pressure 1.6-2.5MPa, kept this temperature 0.5-1.5 hour, reduce temperature then, pumping equipment 7 is got rid of pot liquids at the bottom of opening simultaneously jar, when temperature is reduced to 120-150 ℃, when pressure is 0.2-0.5MPa, open discharge device 8, make rubbish after the pyrolysis by expanded 19 expanded spurting to pyrolysis rubbish collecting bin 18, the pressure volume pot discharge gate is generally 10-50 rice to distance between the collecting bin and gets final product.Be provided with apron feeder 10 in the bottom of collecting bin 18, rubbish after the pyrolysis is sent into belt conveyor 11, belt conveyor 11 is delivered to screening machine 12 with rubbish, screening machine 12 becomes sieve to go up expanded agricultural soil under combustible and the sieve sieving garbage, combustible is by belt sieve 13 on the sieve, remove stone, tile fragment, be used for behind the inorganic matters such as glass burning, burn the steam that produces and to be transported to use in the steam pressure container tank 5 by pipeline, tile fragment, stone, inorganic matters such as glass are delivered to brickmaking factory or landfill factory, sieve expanded agricultural soil down passes through belt conveyor 14, be sent to grater 15, be used for agricultural or afforestation after grinding, or further composting.

The volume of described pressure volume pot can be 1560M ³, diameter is a  1.5-3.5 rice, and charging aperture adopts Gate-valve sealing, and its diameter is a  0.4-1.2 rice, and discharge gate adopts pneumatic band hand sluice valve sealing, and its diameter is a  0.3-0.8 rice.

On belt conveyor 3, be provided with manual inspection platform 16, be used for manually detecting diameter or length bulk rubbish greater than 298mm, on belt conveyor 3 and belt conveyor 11, also be provided with magnetic separator 9 and magnetic separator 17, the magnetisable material in the rubbish such as various metallics, old and useless battery etc. can be told recovery.

After adopting above-mentioned process disposal of refuse, garbage harmless can reach 100%, and minimizing is brought up to about 80% by present 50%, and handled thing recycle value (regenerated resources) also significantly improves, and the garbage disposal effect is fairly obvious.

Claims

1, a kind of steam pyrolysis facture of domestic waste is characterized in that,

Diameter or length are less than the primary domestic waste of 300mm, the calcium lime powder that mixes the 1-10 kilogram per ton, send in the pressure volume pot by conveyer, feed steam then it is carried out pyrolysis, make steam and rubbish temperature in the pressure volume pot reach 200-250 ℃ in confined conditions, pressure 1.6-2.5MPa kept this temperature 0.5-1.5 hour

Cooling then, pumping equipment is got rid of pot liquid at the bottom of opening simultaneously jar, when being cooled to 120-150 ℃, pressure 0.2-0.5MPa opens discharge device, makes that jar interior rubbish is expanded to be spurted to collecting bin, the pressure volume pot discharge gate between the collecting bin apart from being 10-50 rice,

Expanded rubbish is sent to that screening machine sieves and magnetic separation in the collecting bin, after the screening expanded agricultural soil is used for agricultural or urban afforestation, combustible burns with incinerator, and brick, tile fragment inorganic matter carry out landfill, and the metal in the magnetisable material, battery are recycled.