CN103861863B - A kind of domestic waste Comprehensive utilization method - Google Patents
A kind of domestic waste Comprehensive utilization method Download PDFInfo
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Abstract
The invention discloses a kind of domestic waste Comprehensive utilization method, comprising: (1) coarse crushing process: rubbish is carried out preliminary fragmentation, and screens; (2) metal recovery process: metallics absorption is carried out to the first oversize after screening and the first screenings, and recycles; (3) light materials process: by light materials recycling and processing device, processing is carried out to light materials and process, make the structural lumber finished product that can directly use; (4) heavy substance process: organic matter and other recyclable waste materials are carried out separating treatment, and the recyclable waste material separated is sent to recyclable waste material collection device and reclaims; (5) the remaining garbage disposal of meal: the first screenings carried out successively smart break process, fermentation process, carry out pulverization process, makes the plant nutrient soil that can directly utilize.Adopt the present invention, can classify to house refuse and make full use of, be converted into the structural lumber that can directly use and plant nutrient soil etc.
Description
Technical field
The present invention relates to garbage reclamation treatment technology, particularly relate to a kind of domestic waste Comprehensive utilization method.
Background technology
The process of domestic waste generally has traditional burying method and comparatively advanced electricity generating method by burning.Traditional burying method takies a large amount of land resource, and percolate and methane all can be had in the more than ten years of rubbish after landfill to produce, and the manpower and financial resources of at substantial is wanted in follow-up process.The method of burning electricity generation is the comparatively advanced practice, but it is excessive to there is investment, the problems such as generating efficiency is low, also there will be many challenges such as addressing, expropriation of land, toxic gas discharge and causes the opposition of the local common people.In fact in house refuse containing a large amount of packaging material, to burn or landfill is all significant wastage to resource, therefore, to house refuse carry out classifying reclaim and recycle be worth we go to put into practice and the problem of research.In prior art, for solving the problem, people also provide the sorting technique that some realize consumer waste innocent, but generally house refuse can only be converted into callable intermediate raw material, semi-finished product are recycled, and can not be converted into the finished product that can directly use.
Application number be 201310108799.1 Chinese invention patent application disclose " a kind of domestic waste harmless treatment system and method, wherein, system comprises apron feeder, magnetic separator, primary mill, rotary screen, winnowing machine, trajectory sieves, advanced mill, high-temperature oxydation revolving reaction still ", although this structure is to a certain degree solving the problem of garbage reclamation utilization, but can not realize thoroughly classifying to house refuse and making full use of, fractions in domestic waste can only be converted into solid waste environment-friendly fuel raw material, there is relative limitation, and other compositions in house refuse can not fully be recycled, cause very large waste.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, there is provided one can classify to house refuse, and each composition made full use of in house refuse, be the domestic waste Comprehensive utilization method of structural lumber and the plant nutrient soil that can directly use by each conversion in domestic waste.
For achieving the above object, the present invention adopts following scheme:
A kind of domestic waste Comprehensive utilization method, comprises the steps:
(1) coarse crushing process
(1-1) domestic waste is sent in thick formula disintegrating machine, after thick formula disintegrating machine carries out preliminary fragmentation, obtain coarse crushing rubbish; Wherein, large part material can by broken to 10 ~ 20cm, and little material only can be slightly broken or not broken;
(1-2) described coarse crushing rubbish enters the first drum screen and carries out rolling screening, and draw the first oversize and the first screenings, the first oversize transmits to the direction of winnowing machine, and the first screenings transmits to the direction of the remaining refuse disposal installation of meal; Wherein, the first oversize is the material (containing materials such as metal, plastics, organic matters) that particle diameter is greater than 6 ~ 8cm, and the first screenings is the material (containing materials such as metal, plastics, organic matters) that particle diameter is less than 6 ~ 8cm;
(2) metal recovery process
(2-1) the first oversize is in the process being sent to winnowing machine, and the magnetic metal species adsorbs in the first oversize is separated by the first magnetic separator, and recycles;
(2-2) the first screenings is in the process being sent to the remaining refuse disposal installation of meal, and the magnetic metal species adsorbs in the first screenings is separated by the second magnetic separator, and recycles;
(3) light materials process
(3-1) winnowing machine carries out selection by winnowing process to the first oversize after removal magnetic metal material, and heavy substance is separated with light materials; Wherein, heavy substance comprises organic matter and other recyclable waste materials, and light materials comprises plastic substance etc.;
(3-2) light materials is sent to light materials recycling and processing device by the light materials discharging opening of winnowing machine by conveyer belt, carries out processing and processes, make the structural lumber finished product that can directly use by light materials recycling and processing device to light materials;
(3-3) heavy substance then carries out process recovery by step (4);
(4) heavy substance process
(4-1) heavy substance is sent to heavy substance recycling and processing device by the heavy substance discharging opening of winnowing machine by conveyer belt, organic matter in heavy substance and other recyclable waste materials are carried out separating treatment by heavy substance recycling and processing device, and other the recyclable waste materials separated are sent to recyclable waste material collection device by the recyclable waste material discharging opening of heavy substance recycling and processing device and reclaim;
(4-2) organic matter separated then is sent to the remaining refuse disposal installation of meal by the organic matter discharging opening of heavy substance recycling and processing device, carries out processing process by step (5), makes the plant nutrient soil that can directly use;
(5) the remaining garbage disposal of meal
(5-1) advanced mill of the remaining refuse disposal installation of meal first carries out smart break process to the organic matter that the first screenings after removal metallics and step (4-2) send, and obtains remaining attritioning rubbish of eating; More than described meal, attritioning rubbish comprises the non-plastic material that Plastic material and particle diameter are 0 ~ 2cm;
(5-2) carry out fermentation process in the fermentation tank remaining for meal attritioning rubbish being sent to the remaining refuse disposal installation of meal, form Nutrition Soil semi-finished product;
(5-3) Nutrition Soil semi-finished product are carried out pulverization process by the pulverizer of the remaining refuse disposal installation of meal, finally form the plant nutrient soil that can directly use.
In described step (3-2), described light materials recycling and processing device specifically comprises the step that light materials carries out processing process: drying machine carries out drying and processing to light materials; Light materials after oven dry enters the first disintegrating machine and carries out break process, obtains broken light materials; Broken light materials is sent in proportioning machine, in proportioning machine, add sheet material raw material simultaneously; After broken light materials and sheet material raw material coordinate, then undertaken adding thermal agitation by heating mixer, form sheet fabrication raw material; Sheet fabrication raw material is extruded by trigger squeeze hot briquetting again; The sheet material semi-finished product formed shear out suitable dimension by guillotine, finally form the structural lumber finished product that can directly use.
The particle size of described broken light materials is 0 ~ 0.5cm; Described proportioning machine carries out the thermoplastic content of the material after coordinating adjustment in 30 ~ 35% to broken light materials and sheet material raw material; Material after broken light materials and sheet material raw material coordinate is undertaken being heated to 200 ~ 250 degrees Celsius by heating mixer, trigger squeeze sent into by the sheet fabrication raw material that will be formed again, and trigger squeeze is by described sheet fabrication raw material extruded and extrusion board semi-finished product under 280 ~ 300 degrees Celsius.
Described sheet material raw material is vegetative fiber class material or category of thermoplastics material.
In described step (5-2), before fermentation process is carried out to the remaining attritioning rubbish of meal, first carry out rolling screening by the 3rd drum screen, draw the 3rd oversize and the 3rd screenings, the first disintegrating machine sending into light materials recycling and processing device together with the light materials that described 3rd oversize and winnowing machine screen carries out break process, and carry out follow-up processing process, make the structural lumber finished product that can directly use; 3rd screenings is then sent in fermentation tank and is carried out fermentation process.Wherein, the 3rd oversize comprises plastic substance etc., and the 3rd screenings comprises organic matter etc.
In described step (4-1), the step that organic matter in heavy substance and other recyclable waste materials carry out separating treatment specifically comprises by heavy substance recycling and processing device: heavy substance is carried out break process by the second disintegrating machine, obtain broken heavy substance (brittle substance particle diameter 0 ~ 5cm, toughness material is not broken substantially); Broken heavy substance carries out rolling screening through the second drum screen, and the recyclable waste material of the organic matter in broken heavy substance and other is separated; The oversize of the second drum screen is other described recyclable waste materials, and the oversize discharging opening of the second drum screen is described recyclable waste material discharging opening; The screenings of the second drum screen is described organic matter, and the screenings discharging opening of the second drum screen is described organic matter discharging opening.
Described broken heavy substance comprises toughness material and particle diameter is the brittle substance of 0 ~ 5cm.
The particle size of described coarse crushing rubbish is 0 ~ 20cm.
Described light materials at least comprises plastic substance; Described heavy substance at least comprises organic matter.
Described recyclable waste material collection device is the waste recovery box of other recyclable waste materials described in a reception.
Implement the present invention, there is following beneficial effect:
(1) the present invention can classify to house refuse, and makes full use of each composition in house refuse, is the structural lumber finished product that can directly use and plant nutrient soil by each conversion in domestic waste;
(2) the present invention can realize the machine classification of domestic waste, and the recovery whereabouts of all kinds of material is clear and definite, and recovery utilization rate is high, and safe and reliable;
(3) the present invention to domestic waste classification while and fully utilize, rubbish residual volume does not seldom even have residual volume, and processing procedure emits no waste water;
(4) in rubbish, plastics kind is complicated, and this method utilizes the thermoplastic in domestic waste (light materials) to be directly processed into structural lumber finished product as adhesive, just can directly utilize, very convenient and environmental protection without the need to classifying to plastics again;
(5) this method utilizes the compositions such as the organic matter in the remaining rubbish of meal to carry out fermentation processing, forms the plant nutrient soil that can directly use, resource is fully used.
(6) this method can not produce other pollutants in processing procedure, can not cause secondary pollution to environment.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the inventive method.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 1, this domestic waste Comprehensive utilization method, comprises the steps:
(1) coarse crushing process
(1-1) sent into by domestic waste in thick formula disintegrating machine, thick formula disintegrating machine obtains coarse crushing rubbish after carrying out preliminary fragmentation (coarse crushing); Wherein, large part material can by broken to 10 ~ 20cm, and little material only can be slightly broken or be not broken;
(1-2) described coarse crushing rubbish enters the first drum screen and carries out rolling screening, and draw the first oversize and the first screenings, the first oversize transmits to the direction of winnowing machine, and the first screenings transmits to the direction of the remaining refuse disposal installation of meal; Wherein, the first oversize is the material (containing materials such as metal, plastics, organic matters) that particle diameter is greater than 6 ~ 8cm, and the first screenings is the material (containing materials such as metal, plastics, organic matters) that particle diameter is less than 6 ~ 8cm;
(2) metal recovery process
(2-1) the first oversize is in the process being sent to winnowing machine, and the magnetic metal species adsorbs in the first oversize is separated by the first magnetic separator, and recycles;
(2-2) the first screenings is in the process being sent to the remaining refuse disposal installation of meal, and the magnetic metal species adsorbs in the first screenings is separated by the second magnetic separator, and recycles;
(3) light materials process
(3-1) winnowing machine carries out selection by winnowing process to the first oversize after removal magnetic metal material, and heavy substance is separated with light materials; Wherein, heavy substance comprises organic matter and other recyclable waste materials, and light materials comprises plastic substance etc.;
(3-2) light materials is sent to light materials recycling and processing device by the light materials discharging opening of winnowing machine by conveyer belt, carries out processing and processes, make the structural lumber finished product that can directly use by light materials recycling and processing device to light materials;
In described step (3-2), described light materials recycling and processing device specifically comprises the step that light materials carries out processing process: drying machine carries out drying and processing to light materials; Light materials after oven dry enters the first disintegrating machine and carries out break process, obtains broken light materials (particle diameter 0 ~ 0.5cm); Broken light materials is sent in proportioning machine, in proportioning machine, add sheet material raw material simultaneously; After broken light materials and sheet material raw material coordinate, then undertaken adding thermal agitation by heating mixer, form sheet fabrication raw material; Sheet fabrication raw material adds hot extrusion molding by trigger squeeze again and extrudes; The sheet material semi-finished product formed shear out suitable dimension by guillotine, finally make the structural lumber finished product that can directly use;
The particle diameter of described broken light materials is 0 ~ 0.5cm; Described proportioning machine carries out the thermoplastic content of the material after coordinating adjustment in 30 ~ 35% to broken light materials and sheet material raw material; Material after broken light materials and sheet material raw material coordinate is undertaken being heated to 200 ~ 250 degrees Celsius by heating mixer, trigger squeeze sent into by the sheet fabrication raw material that will be formed again, and trigger squeeze is by described sheet fabrication raw material extruded and extrusion board semi-finished product under 280 ~ 300 degrees Celsius;
Described sheet material raw material is vegetative fiber class material or category of thermoplastics material, as the timber after fragmentation, husk or PP, PE particle etc., is used as and coordinates with broken light materials and for the batching of sheet fabrication;
(3-3) heavy substance then carries out process recovery by step (4);
(4) heavy substance process
(4-1) heavy substance is sent to heavy substance recycling and processing device by the heavy substance discharging opening of winnowing machine by conveyer belt, organic matter in heavy substance and other recyclable waste materials are carried out separating treatment by heavy substance recycling and processing device, and other the recyclable waste materials separated are sent to recyclable waste material collection device by the recyclable waste material discharging opening of heavy substance recycling and processing device and reclaim;
In described step (4-1), the step that organic matter in heavy substance and other recyclable waste materials carry out separating treatment specifically comprises by heavy substance recycling and processing device: heavy substance is carried out break process by the second disintegrating machine, obtain broken heavy substance (brittle substance particle diameter 0 ~ 5cm, toughness material is not broken substantially); Broken heavy substance carries out rolling screening through the second drum screen, and the recyclable waste material of the organic matter in broken heavy substance and other is separated; The oversize of the second drum screen is other described recyclable waste materials, and the oversize discharging opening of the second drum screen is described recyclable waste material discharging opening; The screenings of the second drum screen is described organic matter, and the screenings discharging opening of the second drum screen is described organic matter discharging opening; Wherein, the oversize of the second drum screen is the material that particle diameter is greater than 4 ~ 6cm, and screenings is the material that particle diameter is less than 4 ~ 6cm;
(4-2) organic matter separated then is sent to the remaining refuse disposal installation of meal by the organic matter discharging opening of heavy substance recycling and processing device, carries out processing process by step (5), makes the plant nutrient soil that can directly use;
(5) the remaining garbage disposal of meal
(5-1) advanced mill of the remaining refuse disposal installation of meal first carries out smart break process to the organic matter that the first screenings after removal metallics and step (4-2) send, and obtains remaining attritioning rubbish of eating; More than described meal, attritioning rubbish comprises Plastic material and particle diameter is the non-plastic materials such as the organic matter of 0 ~ 2cm;
(5-2) carry out fermentation process in the fermentation tank remaining for meal attritioning rubbish being sent to the remaining refuse disposal installation of meal, form Nutrition Soil semi-finished product;
In described step (5-2), before fermentation process is carried out to the remaining attritioning rubbish of meal, first carry out rolling screening by the 3rd drum screen, draw the 3rd oversize and the 3rd screenings, the first disintegrating machine sending into light materials recycling and processing device together with the light materials that described 3rd oversize and winnowing machine screen carries out break process, and carry out follow-up processing process, make the structural lumber finished product that can directly use; 3rd screenings is then sent in fermentation tank and is carried out fermentation process; Wherein, the 3rd oversize comprises plastic substance etc., and the 3rd screenings comprises organic matter etc.; Wherein, the 3rd oversize is the material that particle diameter is greater than 0.8 ~ 2cm, and the 3rd screenings is the material that particle diameter is less than 0.8 ~ 2cm;
(5-3) Nutrition Soil semi-finished product are carried out pulverization process by the pulverizer of the remaining refuse disposal installation of meal, finally make the plant nutrient soil that can directly use.
Described broken heavy substance comprises toughness material and particle diameter is the brittle substance of 0 ~ 5cm.
The particle size of described coarse crushing rubbish is 0 ~ 20cm.
Described light materials at least comprises plastic substance; Described heavy substance at least comprises organic matter.
Described recyclable waste material collection device is the waste recovery box of other recyclable waste materials described in a reception.
Adopt the present invention, house refuse is through thick formula disintegrating machine, and by broken for the large part material block into about 10 ~ 20cm, little material only can be slightly broken or not broken, enters the first drum screen and be sieved into oversize and screenings two parts material after fragmentation; Oversize is through magnetic separator, and ferromagnetism metalloid can be selected by magnetic separator and reclaim, and rest materials enters winnowing machine.Winnowing machine can select light, weigh two kinds of materials.Light materials is mainly sheet thermoplastic, and this material enters drying machine and dries, and then enters disintegrating machine (the first disintegrating machine) broken.Heavy material is sorted into can fermented ingredient (organic matter) and other regenerants, can deliver to advanced mill and carry out fragmentation by fermented ingredient.Proportioning machine batching is entered from the first disintegrating machine (mixing crusher) material out, adjustment thermoplastic content is in 30 ~ 35% scopes, then deliver in heating and stirring device and be heated to 200 ~ 250 degrees Celsius and stir three minutes, and then feeding adds hot-extrudable trigger squeeze, depress to sheet material at 280 ~ 300 degrees Celsius, last guillotine cuts into finished product sheet material.The batching that proportioning machine adds is vegetative fiber composition or thermoplastic contents.Screenings enters type fine disintegrating machine after magnetic metal thing (as ferromagnetism thing, ferromagnetism thing collects and reclaims together) selected by magnetic separator, then sends into a drum screen (the 3rd drum screen) sorting, and on-the-sieve material sends the first disintegrating machine above back to.Screenings is sent to fermentation vat hot fermentation, enters a pulverizer and pulverizes, become the Nutrition Soil of green plants after ageing after having fermented.In this method, optimal thermoplastic contents is 30 ~ 35%, vegetative fiber composition 50 ~ 65%, allows other usual impurities composition 0 ~ 20% of existence.
Above disclosedly be only a kind of preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (9)
1. a domestic waste Comprehensive utilization method, is characterized in that comprising the steps:
(1) coarse crushing process
(1-1) domestic waste is sent in thick formula disintegrating machine, after thick formula disintegrating machine carries out preliminary fragmentation, obtain coarse crushing rubbish;
(1-2) described coarse crushing rubbish enters the first drum screen and carries out rolling screening, and draw the first oversize and the first screenings, the first oversize transmits to the direction of winnowing machine, and the first screenings transmits to the direction of the remaining refuse disposal installation of meal;
(2) metal recovery process
(2-1) the first oversize is in the process being sent to winnowing machine, and the magnetic metal species adsorbs in the first oversize is separated by the first magnetic separator, and recycles;
(2-2) the first screenings is in the process being sent to the remaining refuse disposal installation of meal, and the magnetic metal species adsorbs in the first screenings is separated by the second magnetic separator, and recycles;
(3) light materials process
(3-1) winnowing machine carries out selection by winnowing process to the first oversize after removal magnetic metal material, and heavy substance is separated with light materials;
(3-2) light materials is sent to light materials recycling and processing device by the light materials discharging opening of winnowing machine by conveyer belt, carries out processing and processes, make the structural lumber finished product that can directly use by light materials recycling and processing device to light materials; In described step (3-2), described light materials recycling and processing device specifically comprises the step that light materials carries out processing process: drying machine carries out drying and processing to light materials; Light materials after oven dry enters the first disintegrating machine and carries out break process, obtains broken light materials; Broken light materials is sent in proportioning machine, in proportioning machine, add sheet material raw material simultaneously; After broken light materials and sheet material raw material coordinate, then undertaken adding thermal agitation by heating mixer, form sheet fabrication raw material; Sheet fabrication raw material adds hot extrusion molding by trigger squeeze again and extrudes; The sheet material semi-finished product formed shear out suitable dimension by guillotine, finally make the structural lumber finished product that can directly use;
(3-3) heavy substance then carries out process recovery by step (4);
(4) heavy substance process
(4-1) heavy substance is sent to heavy substance recycling and processing device by the heavy substance discharging opening of winnowing machine by conveyer belt, organic matter in heavy substance and other recyclable waste materials are carried out separating treatment by heavy substance recycling and processing device, and other the recyclable waste materials separated are sent to recyclable waste material collection device by the recyclable waste material discharging opening of heavy substance recycling and processing device and reclaim;
(4-2) organic matter separated then is sent to the remaining refuse disposal installation of meal by the organic matter discharging opening of heavy substance recycling and processing device, carries out processing process by step (5), makes the plant nutrient soil that can directly use;
(5) the remaining garbage disposal of meal
(5-1) advanced mill of the remaining refuse disposal installation of meal first carries out smart break process to the organic matter that the first screenings after removal metallics and step (4-2) send, and obtains remaining attritioning rubbish of eating;
(5-2) carry out fermentation process in the fermentation tank remaining for meal attritioning rubbish being sent to the remaining refuse disposal installation of meal, form Nutrition Soil semi-finished product;
(5-3) Nutrition Soil semi-finished product are carried out pulverization process by the pulverizer of the remaining refuse disposal installation of meal, finally make the plant nutrient soil that can directly use.
2. domestic waste Comprehensive utilization method according to claim 1, is characterized in that, the particle diameter of described broken light materials is 0 ~ 0.5cm; Described proportioning machine carries out the thermoplastic content of the material after coordinating adjustment in 30 ~ 35% to broken light materials and sheet material raw material; Material after broken light materials and sheet material raw material coordinate is undertaken being heated to 200 ~ 250 degrees Celsius by heating mixer, trigger squeeze sent into by the sheet fabrication raw material that will be formed again, trigger squeeze by described sheet fabrication raw material at 280 ~ 300 degrees Celsius of compacted unders and extrusion board semi-finished product.
3. domestic waste Comprehensive utilization method according to claim 1, is characterized in that, described sheet material raw material is vegetative fiber class material or category of thermoplastics material.
4. domestic waste Comprehensive utilization method according to claim 1, it is characterized in that, in described step (5-2), before fermentation process is carried out to the remaining attritioning rubbish of meal, first carry out rolling screening by the 3rd drum screen, draw the 3rd oversize and the 3rd screenings, the first disintegrating machine sending into light materials recycling and processing device together with the light materials that described 3rd oversize and winnowing machine screen carries out break process, and carry out follow-up processing process, make the structural lumber finished product that can directly use; 3rd screenings is then sent in fermentation tank and is carried out fermentation process.
5. domestic waste Comprehensive utilization method according to claim 1, it is characterized in that, in described step (4-1), the step that organic matter in heavy substance and other recyclable waste materials carry out separating treatment specifically comprises by heavy substance recycling and processing device: heavy substance is carried out break process by the second disintegrating machine, obtains broken heavy substance; Broken heavy substance carries out rolling screening through the second drum screen, and the recyclable waste material of the organic matter in broken heavy substance and other is separated; The oversize of the second drum screen is other described recyclable waste materials, and the oversize discharging opening of the second drum screen is described recyclable waste material discharging opening; The screenings of the second drum screen is described organic matter, and the screenings discharging opening of the second drum screen is described organic matter discharging opening.
6. domestic waste Comprehensive utilization method according to claim 5, is characterized in that, described broken heavy substance comprises toughness material and particle diameter is the brittle substance of 0 ~ 5cm.
7. domestic waste Comprehensive utilization method according to claim 1, is characterized in that, the particle size of described coarse crushing rubbish is 0 ~ 20cm.
8. domestic waste Comprehensive utilization method according to claim 1, is characterized in that, described light materials at least comprises plastic substance; Described heavy substance at least comprises organic matter.
9. domestic waste Comprehensive utilization method according to claim 1, is characterized in that, described recyclable waste material collection device is the waste recovery box of other recyclable waste materials described in a reception.
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Denomination of invention: Urban domestic garbage comprehensive utilization treatment method Effective date of registration: 20180521 Granted publication date: 20160420 Pledgee: Shanghai Institute of Mechanical & Electrical Engeering Co., Ltd. Pledgor: Guangzhou Bao Lv Environmental Protection Technology Co., Ltd Registration number: 2018440000126 |