CN111019676A - Household garbage treatment system and method - Google Patents
Household garbage treatment system and method Download PDFInfo
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- CN111019676A CN111019676A CN201911335683.5A CN201911335683A CN111019676A CN 111019676 A CN111019676 A CN 111019676A CN 201911335683 A CN201911335683 A CN 201911335683A CN 111019676 A CN111019676 A CN 111019676A
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- pyrolysis
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- household garbage
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
Abstract
The invention discloses a household garbage treatment system and a household garbage treatment method. This domestic waste processing system includes: the drying device is provided with a household garbage inlet, a first high-temperature medium inlet, a dried household garbage outlet and a dried tail gas outlet; the pyrolysis device is provided with a dry household garbage inlet, a second high-temperature medium inlet, a pyrolysis solid product outlet, a pyrolysis oil gas outlet and a second high-temperature medium outlet, the dry household garbage inlet is connected with the dry household garbage outlet, and the second high-temperature medium outlet is connected with the first high-temperature medium inlet; the post-separation vibrating screen is provided with a pyrolysis solid product inlet, an oversize product outlet and an undersize product outlet, and the pyrolysis solid product inlet is connected with the pyrolysis solid product outlet. The household garbage treatment system can further screen the pyrolysis solid product after garbage pyrolysis, and separate the biochar from other substances, so that the resource utilization level of the household garbage is improved.
Description
Technical Field
The invention relates to the technical field of solid waste treatment, in particular to a household garbage treatment system and method.
Background
The reduction, resource utilization and harmlessness of the domestic waste treatment are basic principles required to be followed by the solid waste treatment. At present, the treatment modes of the household garbage mainly comprise sanitary landfill, incineration, composting, pyrolysis and other methods. The method for mixing and collecting garbage is adopted in most towns in China at present, and the garbage components are different due to different economic development, technical level, regional natural conditions and social environment of each region. The developed coastal area has high organic content and water content; developed inland cities have high organic matter content, more recoverable matters and low water content; remote, western lag areas and economically undeveloped areas have more inorganic matters and high ash content. In landfills, the absence of pre-sorting can result in contamination of groundwater and soil with harmful or difficult to degrade materials; when the incineration is adopted, the energy consumption of incineration can be increased if the separation of heat value substances is not reduced; when the compost is used for treating garbage, heavy metal substances can pollute soil. Therefore, the domestic garbage treatment process can obtain better treatment effect only by adding the pre-garbage sorting treatment process in each treatment process.
Therefore, regardless of the municipal solid waste treatment method, a waste sorting process is required. The current common garbage sorting process is garbage pre-sorting, and the garbage pre-sorting process has higher early-stage investment cost, but if the garbage pre-sorting technology is adopted, the investment cost is higher, and the later-stage operation cost is increased, so the mode of the garbage sorting technology needs to be changed to reduce the investment of the early-stage cost and the later-stage operation cost.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, it is an object of the present invention to provide a household garbage disposal system and method. This domestic waste processing system can be after the rubbish pyrolysis, further screens the pyrolysis solid product, with biochar and other material separation among them to improve domestic waste's resource utilization level.
In one aspect of the invention, a household garbage disposal system is provided. According to an embodiment of the present invention, the household garbage disposal system includes: the drying device is provided with a household garbage inlet, a first high-temperature medium inlet, a dried household garbage outlet and a dried tail gas outlet; the pyrolysis device is provided with a dry household garbage inlet, a second high-temperature medium inlet, a pyrolysis solid product outlet, a pyrolysis oil gas outlet and a second high-temperature medium outlet, the dry household garbage inlet is connected with the dry household garbage outlet, and the second high-temperature medium outlet is connected with the first high-temperature medium inlet; the post-separation vibrating screen is provided with a pyrolysis solid product inlet, an oversize product outlet and an undersize product outlet, and the pyrolysis solid product inlet is connected with the pyrolysis solid product outlet.
According to the household garbage treatment system provided by the embodiment of the invention, firstly, household garbage to be treated is dried through the drying device, most of moisture in the household garbage is removed, and the dried household garbage enters the pyrolysis device for pyrolysis treatment to obtain pyrolysis solid products and pyrolysis oil gas. Wherein, the pyrolysis solid product mainly comprises biochar and bulk materials which can not be pyrolyzed in the garbage. Subsequently, sorting the pyrolysis solid product by a post-sorting vibrating screen to respectively obtain the undersize biochar and the oversize bulk material. The obtained biochar can be used as a soil conditioner or a fertilizer making way or can be sold after treatment, and large substances which cannot be pyrolyzed on a screen can be further recycled and sold for the second time after being treated by heavy metal sorting and the like. Therefore, the household garbage treatment system can avoid the problems of large land utilization area, high early-stage investment cost, high later-stage labor cost and the like caused by the traditional garbage pre-sorting process by performing post-sorting after garbage pyrolysis, realizes the resource utilization of products and the aims of high efficiency, cleanness and energy conservation, and has good economic benefit and environmental protection benefit.
In addition, the household garbage disposal system according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the invention, the household waste disposal system further comprises: the first heat supply device is provided with a pyrolysis oil gas inlet, a high-temperature medium outlet and a combustion tail gas outlet, the pyrolysis oil gas inlet is connected with the pyrolysis oil gas outlet, and the high-temperature medium outlet is connected with the first high-temperature medium inlet.
In some embodiments of the invention, the household waste disposal system further comprises: and the second heat supply device is connected with the second high-temperature medium inlet.
In some embodiments of the invention, the household waste disposal system further comprises: and the tail gas treatment device is connected with the dry tail gas outlet and the combustion tail gas outlet.
In some embodiments of the invention, the post-sorting vibrating screen is provided with screen holes with the aperture size of 50-70 mm.
In another aspect of the present invention, the present invention provides a domestic garbage disposal method implemented by using the domestic garbage disposal system of the above embodiment. According to the embodiment of the invention, the household garbage treatment method comprises the following steps: supplying the household garbage to be treated into a drying device for drying treatment to obtain dried household garbage and dried tail gas; supplying the dried domestic garbage into a pyrolysis device for pyrolysis treatment to obtain a pyrolysis solid product and pyrolysis oil gas; and feeding the pyrolysis solid product to a post-separation vibrating screen for separation treatment to obtain oversize products and undersize products.
According to the household garbage treatment method provided by the embodiment of the invention, firstly, the household garbage to be treated is dried by the drying device, most of moisture in the household garbage is removed, and the dried household garbage enters the pyrolysis device for pyrolysis treatment to obtain a pyrolysis solid product and pyrolysis oil gas. Wherein, the pyrolysis solid product mainly comprises biochar and bulk materials which can not be pyrolyzed in the garbage. Subsequently, sorting the pyrolysis solid product by a post-sorting vibrating screen to respectively obtain the undersize biochar and the oversize bulk material. The obtained biochar can be used as a soil conditioner or a fertilizer making way or can be sold after treatment, and large substances which cannot be pyrolyzed on a screen can be further recycled and sold for the second time after being treated by heavy metal sorting and the like. Therefore, the domestic garbage treatment method can avoid the problems of large land utilization area, high early-stage investment cost, high later-stage labor cost and the like caused by the traditional garbage pre-sorting process by performing post-sorting after garbage pyrolysis, realizes the resource utilization of products and the aims of high efficiency, cleanness and energy conservation, and has good economic benefit and environmental protection benefit.
In addition, the household garbage disposal method according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the present invention, the domestic waste treatment process further comprises: and supplying the pyrolysis oil gas to a first heat supply device for combustion to obtain a high-temperature medium and combustion tail gas, and using the high-temperature medium for drying treatment.
In some embodiments of the present invention, the drying treatment is performed at 200 to 300 ℃.
In some embodiments of the invention, the pyrolysis treatment is carried out at 500 to 600 ℃.
In some embodiments of the present invention, the domestic waste treatment process further comprises: and supplying the dry tail gas and the combustion tail gas to a tail gas treatment device for tail gas treatment.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a household garbage disposal system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In one aspect of the invention, a household garbage disposal system is provided. According to an embodiment of the present invention, referring to fig. 1, the household garbage disposal system includes: a drying device 100, a pyrolysis device 200, and a post-sorting device 300.
According to an embodiment of the present invention, the drying device 100 has a household garbage inlet, a first high temperature medium inlet, a dried household garbage outlet, and a dried tail gas outlet. The drying device 100 is adapted to dry the household garbage to be treated so as to remove most of the moisture in the household garbage to be treated. In some embodiments, the drying device 100 is a drum structure, which can rotate and has a spiral structure inside. According to a specific example of the present invention, the drying apparatus 100 may be a rotary kiln type dryer.
According to an embodiment of the present invention, the drying process may be performed at 200 to 300 ℃, for example, 200 ℃, 250 ℃, 300 ℃. Specifically, the drying treatment may be performed by directly heating the material with a high-temperature medium (e.g., hot air). The high-temperature medium adopted in the drying treatment can be hot air obtained by burning pyrolysis oil gas obtained by pyrolysis of the subsequent household garbage or hot air output by a subsequent pyrolysis device.
According to the embodiment of the present invention, the pyrolysis apparatus 200 has a dry household garbage inlet, a second high temperature medium inlet, a pyrolysis solid product outlet, a pyrolysis oil gas outlet, and a second high temperature medium outlet, and the pyrolysis apparatus 200 is connected to the drying apparatus 100, specifically, the dry household garbage inlet is connected to the dry household garbage outlet, and the second high temperature medium outlet is connected to the first high temperature medium inlet. The pyrolysis device 200 is adapted to perform pyrolysis treatment on the dry household garbage to obtain pyrolysis oil gas (a mixture of pyrolysis gas and gaseous tar).
According to an embodiment of the present invention, the pyrolysis treatment may be performed at 500 to 600 ℃, for example, 500 ℃, 550 ℃, 600 ℃, and the like. Specifically, the pyrolysis treatment may be performed by directly heating the material with a high-temperature medium (e.g., hot air). In some embodiments, the pyrolysis apparatus 200 is a drum-type structure, which can rotate and has a spiral structure inside.
According to an embodiment of the present invention, the dried domestic waste outlet of the drying device 100 and the dried domestic waste inlet of the pyrolysis device 200 may be connected by a closed type conveying device, such as a screw conveyor or the like.
According to an embodiment of the present invention, the post-sorting vibrating screen 300 has a pyrolysis solid product inlet, an oversize outlet, and an undersize outlet, the post-sorting vibrating screen 300 is connected to the pyrolysis apparatus 200, and the pyrolysis solid product inlet is connected to the pyrolysis solid product outlet. The post-sorting vibrating screen 300 is suitable for screening solid products obtained by pyrolysis of domestic garbage to respectively obtain undersize biochar and oversize bulk substances. The obtained biochar can be used as a soil conditioner or a fertilizer making way or can be sold after treatment, and large substances which cannot be pyrolyzed on a screen can be further recycled and sold for the second time after being treated by heavy metal sorting and the like.
According to the embodiment of the invention, the rear sorting vibrating screen 300 is provided with screen holes with the aperture size of 50-70 mm, and the aperture size is preferably 60 mm. Therefore, the sorting effect of the post-sorting vibrating screen on the pyrolysis solid product is better.
According to an embodiment of the present invention, referring to fig. 1, the household garbage disposal system of the present invention further comprises: the first heating apparatus 400. The first heat supply device 400 has a pyrolysis oil gas inlet, a high-temperature medium outlet and a combustion tail gas outlet, the first heat supply device 400 is connected with the drying device 100 and the pyrolysis device 200, the pyrolysis oil gas inlet is connected with the pyrolysis oil gas outlet, and the high-temperature medium outlet is connected with the first high-temperature medium inlet. From this, first heating device 400 can utilize the pyrolysis oil gas that domestic waste pyrolysis obtained to burn, obtains high temperature medium (hot-blast), and then sends this high temperature medium to drying device in and be used for drying process. The specific type of the first heating apparatus 400 is not particularly limited, and a hot blast stove or the like which is commonly used in the art may be used.
According to an embodiment of the present invention, referring to fig. 1, the household garbage disposal system of the present invention further comprises: the second heating apparatus 500. The second heat supply means 500 is connected to the pyrolysis apparatus 200, and specifically, the second heat supply means 500 is connected to the second high-temperature medium inlet. The second heat supply device 500 may obtain a high-temperature medium (hot air) by burning an external fuel (e.g., diesel), and further send the high-temperature medium to the pyrolysis device 200 for pyrolysis treatment, and then further send the high-temperature medium to the drying device 100 for drying treatment. This can further improve the heat utilization efficiency of the system. The specific type of the second heating apparatus 500 is not particularly limited, and a hot blast stove or the like commonly used in the art may be used.
According to an embodiment of the present invention, referring to fig. 1, the household garbage disposal system of the present invention further comprises: tail gas processing apparatus 600. Tail gas processing apparatus 600 links to each other with drying device 100 and first heat supply unit 400, and is concrete, and tail gas processing apparatus 600 links to each other with drying device 100's dry tail gas export and first heat supply unit 400's burning tail gas export, and is suitable for and discharges up to standard after handling dry tail gas and burning tail gas. In particular, the tailThe gas treatment device can cool, remove dust, acid and pollution factors (NOx and SO) from the tail gas of the system2Suspended particulate matter, etc.), which may include bag-type dust collector, water scrubber, caustic scrubber, etc. common tail gas treatment equipment in the field.
According to an embodiment of the present invention, referring to fig. 1, the household garbage disposal system of the present invention may further include: the biochar bin 700. The biochar bin 700 is connected with the rear sorting vibrating screen 300, and specifically, the biochar bin 700 is connected with an undersize outlet of the rear sorting vibrating screen 300 and is suitable for storing biochar obtained by undersize sorting of the sorting vibrating screen 300.
In another aspect of the present invention, the present invention provides a domestic garbage disposal method implemented by using the domestic garbage disposal system of the above embodiment. According to the embodiment of the invention, the household garbage treatment method comprises the following steps: supplying the household garbage to be treated into a drying device for drying treatment to obtain dried household garbage and dried tail gas; supplying the dried domestic garbage into a pyrolysis device for pyrolysis treatment to obtain a pyrolysis solid product and pyrolysis oil gas; and feeding the pyrolysis solid product to a post-separation vibrating screen for separation treatment to obtain oversize products and undersize products.
The household garbage disposal method is implemented by adopting the household garbage disposal system, so that the household garbage disposal method has all the characteristics and advantages described above for the household garbage disposal system, and is not repeated herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A household waste disposal system, comprising:
the drying device is provided with a household garbage inlet, a first high-temperature medium inlet, a dried household garbage outlet and a dried tail gas outlet;
the pyrolysis device is provided with a dry household garbage inlet, a second high-temperature medium inlet, a pyrolysis solid product outlet, a pyrolysis oil gas outlet and a second high-temperature medium outlet, the dry household garbage inlet is connected with the dry household garbage outlet, and the second high-temperature medium outlet is connected with the first high-temperature medium inlet;
the post-separation vibrating screen is provided with a pyrolysis solid product inlet, an oversize product outlet and an undersize product outlet, and the pyrolysis solid product inlet is connected with the pyrolysis solid product outlet.
2. The household waste disposal system of claim 1, further comprising:
the first heat supply device is provided with a pyrolysis oil gas inlet, a high-temperature medium outlet and a combustion tail gas outlet, the pyrolysis oil gas inlet is connected with the pyrolysis oil gas outlet, and the high-temperature medium outlet is connected with the first high-temperature medium inlet.
3. The household waste disposal system of claim 1, further comprising:
and the second heat supply device is connected with the second high-temperature medium inlet.
4. The household waste disposal system of claim 1, further comprising:
and the tail gas treatment device is connected with the dry tail gas outlet and the combustion tail gas outlet.
5. The household garbage disposal system according to claim 1, wherein the post-sorting vibrating screen is provided with a screen hole with a pore size of 50-70 mm.
6. A household garbage disposal method implemented by using the household garbage disposal system according to any one of claims 1 to 5, comprising:
supplying the household garbage to be treated into a drying device for drying treatment to obtain dried household garbage and dried tail gas;
supplying the dried domestic garbage into a pyrolysis device for pyrolysis treatment to obtain a pyrolysis solid product and pyrolysis oil gas;
and feeding the pyrolysis solid product to a post-separation vibrating screen for separation treatment to obtain oversize products and undersize products.
7. The domestic waste treatment method according to claim 6, further comprising:
and supplying the pyrolysis oil gas to a first heat supply device for combustion to obtain a high-temperature medium and combustion tail gas, and using the high-temperature medium for drying treatment.
8. The method according to claim 6, wherein the drying treatment is performed at 200 to 300 ℃.
9. The method for treating household garbage according to claim 6, wherein the pyrolysis treatment is performed at 500-600 ℃.
10. The domestic waste treatment method according to claim 7, further comprising: and supplying the dry tail gas and the combustion tail gas to a tail gas treatment device for tail gas treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911335683.5A CN111019676A (en) | 2019-12-23 | 2019-12-23 | Household garbage treatment system and method |
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| CN201911335683.5A CN111019676A (en) | 2019-12-23 | 2019-12-23 | Household garbage treatment system and method |
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| CN111019676A true CN111019676A (en) | 2020-04-17 |
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| CN201911335683.5A Pending CN111019676A (en) | 2019-12-23 | 2019-12-23 | Household garbage treatment system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116554931A (en) * | 2023-05-11 | 2023-08-08 | 中鹏未来有限公司 | Domestic garbage carbonization gasification hydrogen production process |
| CN116904231A (en) * | 2023-06-25 | 2023-10-20 | 山东诺泰环保科技有限公司 | Organic solid waste composite hydrogen production process |
-
2019
- 2019-12-23 CN CN201911335683.5A patent/CN111019676A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116554931A (en) * | 2023-05-11 | 2023-08-08 | 中鹏未来有限公司 | Domestic garbage carbonization gasification hydrogen production process |
| CN116554931B (en) * | 2023-05-11 | 2024-02-09 | 中鹏未来有限公司 | Domestic garbage carbonization gasification hydrogen production process |
| CN116904231A (en) * | 2023-06-25 | 2023-10-20 | 山东诺泰环保科技有限公司 | Organic solid waste composite hydrogen production process |
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