CN103752582B - A kind of city domestic garbage treating process - Google Patents

A kind of city domestic garbage treating process Download PDF

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Publication number
CN103752582B
CN103752582B CN201410006087.3A CN201410006087A CN103752582B CN 103752582 B CN103752582 B CN 103752582B CN 201410006087 A CN201410006087 A CN 201410006087A CN 103752582 B CN103752582 B CN 103752582B
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China
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waste
oil
gas
reactor
waste plastics
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CN201410006087.3A
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CN103752582A (en
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李正平
吕彬峰
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Zhejiang Shanhai Environment Science & Technology Co Ltd
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Zhejiang Shanhai Environment Science & Technology Co Ltd
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Abstract

The invention discloses a kind of city domestic garbage treating process, comprise following step: 1) by broken after domestic waste screening, then carry out sorting, obtain organic waste, sand particles and waste plastics; 2) after waste plastics break process through multistage drying and processing, then enter cracking in reactor, reaction temperature is 350 ~ 500 DEG C, carries out gas ash content successively from, oil gas dedusting, there is carbon black to remove in oil gas to the oil gas obtained; 3) oil gas after dust removal process is cooled and three phase separation by mink cell focus cooling, light oil successively, obtain mink cell focus, light oil, waste water and combustible gas respectively.The present invention is by carrying out sorting to domestic waste, the waste plastics obtained, organic waste and the inorganic refuse such as fine sand, rubble are recycled respectively, and cracking is carried out to waste plastics obtain oil and combustible gas, the cracking heating that combustible gas is used for reactor is heated with oven dry, realize rubbish to turn waste into wealth, recycle.

Description

A kind of city domestic garbage treating process
Technical field
The present invention relates to field of solid waste treatment, be specifically related to a kind of city domestic garbage treating process.
Background technology
In urbanization process, rubbish was once the burden of urban development as the product of Urban Metabolism, and all there was the situation of garbage-surrounded city in many cities in the world.Now, that rubbish is considered to most potentiality to be exploited, never exhausted " city mineral reserve " are " resources mislayed ".This is going deep into and in-depth rubbish understanding, is also the inevitable requirement of urban development.
Existing Treatment Way of Municipal Refuse in City mainly contains sanitary landfills, During High-Temperature Composting and burning etc., such as:
Publication number be the patent document of 102151688A propose a kind of in enclosed environment the method for city garbage burning and flying dust process, comprise the following steps: municipal refuse go-no-go: the municipal refuse after go-no-go is broken; With the combustible containing fixed carbon, the municipal refuse after pulverizing is mixed; Municipal refuse after mixed is carried out drying; By the municipal refuse of drying under the condition of mixing oxygen, incineration temperature carries out closing burning to municipal refuse more than 850 DEG C;
Publication number be 103272829A patent document discloses a kind of city house refuse treatment method, by separation, fragmentation, solid fermentation, water washing cleaning, biogas fermentation and composting manufacturing procedure, obtain natural gas and organic fertilizer products.
Along with socioeconomic development, plastics or rubber use more and more extensive in people's daily life, and thing followed waste plastics or scrap rubber also get more and more, and waste plastics or scrap rubber are because of its stable chemical nature, and recovery value is high.At present generally by waste plastics or scrap rubber are cracked into low molecular compound, obtain gasoline, diesel oil, liquefied gas etc. through rectifying, the important channel that cracking process is plastics pollution, processes waste or used plastics, turns waste into wealth.
Every day, by the Coke bottle that we abandon and the polybag, the disposable plastic fast food container that are called as white garbage, belongs to high molecular polymerization organic matter, if be embedded in underground, 200 years also rotten does not fall, it also can make soil compaction, reduces the fertility of soil, even makes soil lose the ability of cultivating.In our life, often can throw away various waste plastics.Waste plastics is the good raw material of oil refining.They were once compared in " secondary oil field " by visually.1 ton of waste plastics at least can the gasoline of freshening 600 kilograms and diesel oil.
Summary of the invention
For reducing the pollution of domestic waste, the invention provides a kind of city domestic garbage treating process, by carrying out sorting to domestic waste, isolate organic waste, inorganic matter and waste plastics, and respectively three kinds of materials are recycled, resource re-uses, and effectively can administer domestic waste and pollute.
A kind of city domestic garbage treating process, comprises following step:
1) by broken after domestic waste screening, then carry out sorting, obtain organic waste, sand particles and waste plastics;
2) after waste plastics break process through multistage drying and processing, then enter cracking in reactor, reaction temperature is 350 ~ 500 DEG C, carries out gas ash content successively from, oil gas dedusting, there is carbon black to remove in oil gas to the oil gas obtained;
3) oil gas after dust removal process is cooled and three phase separation by mink cell focus cooling, light oil successively, obtain mink cell focus, light oil, waste water and combustible gas respectively.
As preferably, in step 1), what screening adopted is the cylinder round sifter with two-stage sieve aperture, and first order sieve aperture is of a size of 5 ~ 15mm, and second level sieve aperture is of a size of 15 ~ 50mm.
The sieve aperture of cylinder round sifter has two-stage sieve aperture, every grade of sieve aperture is for sieving the rubbish of place's different size, and first order sieve aperture is of a size of 5 ~ 15mm, for sieving out the dust granule such as fine sand, rubble, second level sieve aperture is of a size of 15 ~ 50mm, can sieve out the house refuses such as vegetable waste.
As preferably, in step 1), described sorting comprises specific-gravity winnowing and magnetic separation, and specific-gravity winnowing is for separating of going out sand particles, and magnetic separation is for separating of going out discarded metal.
For increasing the recycling to discarded object in rubbish, described sand particles is made into construction material after adding curing agent, and described organic waste, by making fertilizer and bio-bacterial manure after process, is turned waste into wealth, made rational use of resources.
As preferably, described multistage drying and processing adopts the device with three grades of drying rollers, and the baking temperature in every grade of drying roller is followed successively by 80 ~ 100 DEG C, 100 ~ 120 DEG C and 120 ~ 100 DEG C.Three grades of oven dry are divided into prebake, preliminary oven dry and heating, drying, the temperature of prebake is 80 ~ 100 DEG C, the temperature of preliminary oven dry is 100 ~ 120 DEG C, the temperature of heating, drying is 120 ~ 100 DEG C, prebake is used for tentatively carrying out drying to waste plastics, preliminary oven dry can remove the most of steam in waste material, the further dry waste plastics of heating, drying, and enters reactor to waste plastics and carry out preheating.
As preferably, have the heat pipe of interlaced arrangement in described reactor, heat pipe interlaced arrangement makes waste plastics homogeneous heating, can accelerate the decomposition of waste plastics.
As preferably, in step 3), the waste water obtained is transferred to Sewage Plant after oil removal, air-flotation process.
Preferred further, in step 3), the combustible gas obtained is separated light petrol after light petrol cooling, and the combustible gas after separation is respectively used to the heating system of reactor and multistage drying and processing.
The present invention is by carrying out sorting to domestic waste, the waste plastics obtained, organic waste and the inorganic refuse such as fine sand, rubble are recycled respectively, and cracking is carried out to waste plastics obtain oil and combustible gas, the cracking heating that combustible gas is used for reactor is heated with oven dry, realize turning waste into wealth of resource, recycle.
Accompanying drawing explanation
Fig. 1 is the flow chart of urban garbage disposal of the present invention.
Fig. 2 is the process chart of fertilizer material cracking.
Detailed description of the invention
As depicted in figs. 1 and 2, a kind of city domestic garbage treating process, comprises following step:
(1) by broken after domestic waste screening, then carry out sorting, obtain organic waste, sand particles and waste plastics;
What screening adopted is the cylinder round sifter with two-stage sieve aperture, and first order sieve aperture is of a size of 5 ~ 15mm, and second level sieve aperture is of a size of 15 ~ 50mm.
The sieve aperture of cylinder round sifter has two-stage sieve aperture, every grade of sieve aperture is for sieving the rubbish of place's different size, and first order sieve aperture is of a size of 5 ~ 15mm, for sieving out the dust granule such as fine sand, rubble, second level sieve aperture is of a size of 15 ~ 50mm, can sieve out the house refuses such as vegetable waste.
Sorting comprises specific-gravity winnowing and magnetic separation, and specific-gravity winnowing goes out sand particles for separating of what go out that density is greater than waste plastics, and magnetic separation is for separating of going out discarded metal.For increasing the recycling to discarded object in rubbish, sand particles is made into construction material after adding curing agent, and described organic waste, by making fertilizer and bio-bacterial manure after process, is turned waste into wealth, made rational use of resources.
(2) after waste plastics break process through multistage drying and processing, then enter cracking in reactor, reaction temperature is 350 ~ 500 DEG C, carries out gas ash content successively from, oil gas dedusting, there is carbon black to remove in oil gas to the oil gas obtained;
Multistage drying and processing adopts the device with three grades of drying rollers, and the baking temperature in every grade of drying roller is followed successively by 80 ~ 100 DEG C, 100 ~ 120 DEG C and 120 ~ 100 DEG C.Three grades of oven dry are divided into prebake, preliminary oven dry and heating, drying, the temperature of prebake is 80 ~ 100 DEG C, the temperature of preliminary oven dry is 100 ~ 120 DEG C, the temperature of heating, drying is 120 ~ 100 DEG C, prebake is used for tentatively carrying out drying to waste plastics, preliminary oven dry can remove the most of steam in waste material, the further dry waste plastics of heating, drying, and reactor is entered to waste plastics carry out preheating, by increasing the temperature entering waste plastics in reactor, reduce the heat time of waste plastics in reactor, accelerate the decomposition rate of waste plastics at reactor, improve lysis efficiency.
Have heat pipe in reactor, for heating waste plastics, be accelerate the decomposition of waste material, the heat pipe in reactor be interlaced arrangement, and adjacent two heat pipes be 90 ° vertically, make waste plastics homogeneous heating.The oil gas of discharging in reactor by gas ash content from oil gas dedusting, fully isolate in oil gas and there is carbon black, the carbon black obtained by cooling, store, can be used for outer selling.
(3) oil gas after dust removal process is cooled and three phase separation by mink cell focus cooling, light oil successively, obtain mink cell focus, light oil, waste water and combustible gas respectively.
Oil gas after oil gas dust removal process by mink cell focus cooling and light oil cooling, obtains mink cell focus and the oil gas containing light oil successively respectively, then passes through three phase separation to the oil gas with light oil, obtains waste water, light oil and combustible gas.
Owing to containing wet goods foreign-matter contamination in waste water, not directly discharge, need by storing oil removal process, air-flotation process is being carried out to waste water, by the micro-bubble of the dispersion of height of formation in water, adhere to solid or the liquid particles of hydrophobic group in waste water, form water-gas-particle three-phase mixed system, after particle adheres to bubble, form apparent density be less than the flco of water and float to the water surface, form scum layer to be struck off, thus realize solid-liquid or Liquid liquid Separation, the waste water after air-flotation process can be delivered to Sewage Plant and be further processed.
By carrying out light petrol cooling to combustible gas, to isolate the light petrol existed in combustible gas, the combustible gas being separated light petrol is delivered to cracking heating system by roots blower and dries heating system, cracking heating system provides reaction temperature for reactor cracking, dry heating system and provide thermal source for multistage oven dry, the flue gas of cracking system also can be used for drying heating system simultaneously.

Claims (4)

1. a city domestic garbage treating process, is characterized in that, comprises following step:
1) by broken after domestic waste screening, then carry out sorting, obtain organic waste, sand particles and waste plastics;
What screening adopted is the cylinder round sifter with two-stage sieve aperture, and first order sieve aperture is of a size of 5 ~ 15mm, and second level sieve aperture is of a size of 15 ~ 50mm;
Described sorting comprises specific-gravity winnowing and magnetic separation, and specific-gravity winnowing is for separating of going out sand particles, and magnetic separation is for separating of going out discarded metal;
2) after waste plastics break process through multistage drying and processing, then enter cracking in reactor, reaction temperature is 350 ~ 500 DEG C, carries out gas ash content successively from, oil gas dedusting, there is carbon black to remove in oil gas to the oil gas obtained;
3) oil gas after dust removal process is cooled and three phase separation by mink cell focus cooling, light oil successively, obtain mink cell focus, light oil, waste water and combustible gas respectively;
In step 3) in, the waste water obtained is transferred to Sewage Plant after oil removal, air-flotation process;
Combustible gas is separated light petrol after light petrol cooling, and the combustible gas after separation is respectively used to the heating system of reactor and multistage drying and processing.
2. city domestic garbage treating process as claimed in claim 1, it is characterized in that, described sand particles is made into construction material after adding curing agent, and described organic waste is by making fertilizer and bio-bacterial manure after process.
3. city domestic garbage treating process as claimed in claim 1, it is characterized in that, described multistage drying and processing adopts the device with three grades of drying rollers, and the baking temperature in every grade of drying roller is followed successively by 80 ~ 100 DEG C, 100 ~ 120 DEG C and 120 ~ 100 DEG C.
4. city domestic garbage treating process as claimed in claim 1, is characterized in that having the heat pipe of interlaced arrangement in described reactor.
CN201410006087.3A 2014-01-06 2014-01-06 A kind of city domestic garbage treating process Expired - Fee Related CN103752582B (en)

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104532003A (en) * 2014-12-04 2015-04-22 杭州电子科技大学 Method for recovering and using aluminum-plastic composite film
CN105689370B (en) * 2016-04-28 2018-04-20 周口市丰泉环保电力有限公司 A kind of garbage treating process
CN107470330A (en) * 2017-09-15 2017-12-15 佛山科学技术学院 A kind of recycling waste disposal method
CN107983750B (en) * 2017-12-02 2021-08-27 宁波齐心科技股份有限公司 Kitchen waste pretreatment process of kitchen waste pretreatment cart
CN108817029B (en) * 2018-05-29 2019-10-25 杭州伏泰环保科技有限公司 A kind of household-garbage processing process
CN110684548A (en) * 2019-09-19 2020-01-14 苏州再生宝智能物联科技有限公司 Household garbage cracking treatment process
CN110743904B (en) * 2019-11-10 2021-02-09 顺达生态环保科技(葫芦岛)有限公司 Method for preparing organic composite soil from household garbage

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US5783046A (en) * 1994-11-28 1998-07-21 Gentech, Inc. Process and apparatus for the destructive distillation of rubber
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