CN1274427C - Life refuse treating process - Google Patents

Life refuse treating process Download PDF

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Publication number
CN1274427C
CN1274427C CN 03150530 CN03150530A CN1274427C CN 1274427 C CN1274427 C CN 1274427C CN 03150530 CN03150530 CN 03150530 CN 03150530 A CN03150530 A CN 03150530A CN 1274427 C CN1274427 C CN 1274427C
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China
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waste plastics
sent
organic
hydrolysis
dehydration
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CN 03150530
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Chinese (zh)
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CN1583299A (en
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袁静波
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新昌县绿洲生态环保有限公司
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Publication of CN1583299A publication Critical patent/CN1583299A/en
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Abstract

The present invention relates to technology for treating urban house refuse. The the prior art for treating urban house refuse has the defects of poor sorting effect, low utilization rate of organic substances and high operation cost. In the technology of the present invention, house refuse is crushed by a crusher and then enters a separator for carrying out specific-weight air separation and magnetic separation to divide crushed house refuse into inorganic substances, organic refuse and waste plastics. The inorganic substances are sent to a building materials manufacturing system, and the waste plastics are sent to a waste plastics treating system; the organic garbage is sent into a hydrolyzing tank for carrying out self hydrolysis reaction, and dewatering is carried out at the same time of the hydrolysis reaction. Dewatering is continued after the hydrolysis reaction is finished until the content of water is less than 20%, and spraying explosion and drying are carried out after the dewatering is finished. Afterwards, fine screening is carried out to obtain the inorganic substances, organic substances and the waste plastics, and the inorganic substances are pulverized and then sent to the building materials manufacturing system; the waste plastics are sent to the waste plastics treating system, and the organic substances are sent to a fertilizer manufacturing system. The present invention has the advantages of favorable sorting effect of refuse, low operation cost, high utilization rate of the organic substances, no need of adding acidic catalysts and no secondary pollution to environment.

Description

Domestic rubbish disposal technology

Technical field

The invention belongs to field of treatment of solid waste, specifically a kind of technology of handling domestic waste is applicable to that processing is not by the mixed consumer waste of categorised collection.

Background technology

Along with the enhancing of global environmental protection consciousness, the urban garbage disposal of China has been passed through from the evolution of exposed rubbish → simple and easy landfill → simple and easy compost → During High-Temperature Composting → sanitary landfills and burning → recycling treatment.The domestic waste of China is different from developed country, and house refuse output, density are all higher, and combustibles such as paper are few, and water content is up to 40~60%, the composting of the unexecuted categorised collection of domestic waste.External technology of garbage disposal and equipment are not suitable for handling the domestic waste of China because the characteristics of spam of its processing is different from domesticly.The every technology of garbage disposal that adopts in China as building landfill yard, dung yard or incineration plant, all can cause secondary pollution at present, and adopt burning electricity generation because the calorific value of garbage raw material is not high, can not the direct generation of electricity, and the voltage instability of generating, investment is big, and real industrialization operation difficult degree is big.

Disclose a kind of innoxious among the Chinese patent ZL 98102867.5, resource, easily sorting, there is not remaining garbage treating process, it is characterized in that: crude waste is through manually roughly selecting and magnetic separation, remove old metal and refuse battery and diameter or length hard thing greater than 50mm, behind foreign material and the foamed plastics, send into special closed container by conveyer, adopt pyrolytic technique to make it at 1~1.3MPa air pressure, 180~200 ℃ of temperature, the acidic chemical catalyst concn is to carry out chemical catalysis reaction in 3~3.5 hours under 5% the condition, organic matter is fully decomposed, unharmful substance and peculiar smell; Rubbish pH value through pyrolysis processing is 6.5~7.5; The final stage of pyrolytic process is carried out drying and dehydrating and is disposed; To spurt collecting bin in closed container through the rubbish of pyrolysis processing then, and through collecting, be delivered to screening machine organic matter and inorganic matter be separated, the organic matter after conveyer will sieve is sent to the composting system again, and inorganic matter is sent to the building materials system.There is following shortcoming in this garbage treating process: 1) sorting is adopted and manually to be roughly selected and magnetic separation, has more bacterium in the big and rubbish of labour intensity, and operator healthy had certain influence; 2) separating effect is poor, old metal and refuse battery and diameter or length hard thing, foreign material and the foamed plastics greater than 50mm just removed in sorting, and diameter or length can't be separated from organic matter less than hard thing, foreign material and the foamed plastics of 50mm, in the pyrolysis processing process, relatively large organic matter can wrap by reduced waste plastics (diameter or length are less than 50mm), be unfavorable for sieving, organic utilization rate is low again; 3) the pyrolysis processing process needs to handle organic matter, inorganic matter and three kinds of materials of waste plastics, has increased the load capacity of pyrolysis, and need to add concentration be 5% acidic catalyst, the operating cost height; 4) be sent in the inorganic matter of building materials system a large amount of waste plastics are arranged, waste plastics parcel organic matter, because waste plastics and organic matter properties of materials, not too be fit to the system building materials, so need to add a large amount of special modification, coagulating agent and other raw materials in making the process of material, the high and building materials made of cost of manufacture difficulty are up to state standards; 5) waste water that obtains of dehydration is not handled, and its acid number is higher, as natural discharging, can produce secondary pollution to environment.

Summary of the invention

Technical problem to be solved by this invention is the defective that overcomes above-mentioned prior art, provide that a kind of labour intensity is low, good separation effect and the low domestic rubbish disposal technology of operating cost, its organic matter utilization rate height need not to add acidic catalyst, avoids environment is produced secondary pollution.

The present invention adopts following technical scheme: domestic rubbish disposal technology is characterized in that: with the house refuse crusher in crushing, enter separator after the fragmentation and carry out proportion selection by winnowing, magnetic separation, be divided into inorganic matter, organic waste and waste plastics three classes; Inorganic matter is sent to system building materials system, and waste plastics is sent to waste plastics processing system, and organic waste is admitted to hydrolytic decomposition pot and carries out self hydrolysis, dehydration in the time of hydrolysis, dehydration is continued in the intact back of hydrolysis, until water content less than 20%; The quick-fried drying of spray was carried out sifting screen then after dehydration finished, and obtained inorganic matter, organic matter and waste plastics, sent system building materials system after inorganic matter is pulverized, and waste plastics is sent to waste plastics processing system, and organic matter is sent to the composting system.House refuse is at first used crusher in crushing, the diameter or the length of rubbish are diminished, make the good separation effect of back, the rubbish that is wrapped in the waste plastics (mainly being polybag) is dispersed, improve the utilization rate of rubbish, like this, proportion selection by winnowing and magnetic separation can be divided into three major types with rubbish more easily: a class is organic waste (overwhelming majority is organic matter, and minute quantity is waste plastics and inorganic matter); Two classes are inorganic matters such as sandstone, metal; Three classes are waste plastics, foam, fibrous substance (mainly being waste plastics), and rubbish sorting ground before being hydrolyzed is more thorough, mainly is organic matter thereby make the material of hydrolysis, has alleviated the load of hydrolysis greatly, and operating cost is low.Organic waste need not to add acidic catalyst when being hydrolyzed, be that the acetic acid that utilizes the hemicellulose deacetylation generation in the organic matter is enough to satisfy the required catalytic amount of hydrolysis as catalyst because be organic matter in the organic waste in a large number.Because there is not the phenomenon that is wrapped in organic matter, organic utilization rate height in the process of being hydrolyzed.

Described domestic rubbish disposal technology utilizes cyclic steam that hydrolysis and dehydration are carried out simultaneously, and cyclic steam has pressure, also can dewater when making hydrolysis; Described organic waste carries out 3.0~3.5 hours hydrolysis under 6~12MPa air pressure, 100~300 ℃ of temperature, after hydrolysis finishes, continue dehydration, until water content less than 20%.

Described domestic rubbish disposal technology, the processing procedure of waste plastics processing system is as follows: waste plastics is pulverized, through the low temperature pyrocondensation, then added coal, curing agent is made fuel slug.This treatment system makes waste plastics obtain more reasonable use (do not obtain reasonable use among the aforementioned Chinese patent ZL 98102867.5, and influenced the quality of building materials).The inorganic matter that the present invention is used to make building materials does not have waste plastics, has guaranteed the quality of building materials; Do not need to add a large amount of special modification, coagulating agent and other raw materials, reduced the cost of manufacture of building materials.

Described domestic rubbish disposal technology, the organic matter that is sent to the composting system after fine powder is broken directly granulation make compoiste fertilizer; Also can add bacteria agent and cultivate, the acid pickle that dehydration obtains during by hydrolysis avoids acid pickle that environment is produced secondary pollution as catalyst, and bio-bacterial manure is made in dehydration after cultivating, granulation.

Beneficial effect of the present invention: 1) adopt separator to carry out sorting, reduced operator's labour intensity; 2) rubbish makes the rubbish that wraps in the polybag be dispersed good separation effect, organic utilization rate height through after the fragmentation; 3) refuse classification after the sorting becomes three classes, and this three class is carried out separately processing respectively, makes waste plastics rubbish obtain more reasonable use, the load when having alleviated hydrolysis greatly, and operating cost is low; 4) organic waste be hydrolyzed to self hydrolysis, need not to add acidic catalyst, and the acid pickle that obtains of dehydration has been avoided to second environmental pollution as the catalyst of bacteria agent; 5) building material quality that utilizes inorganic matter to make is good, and cost is low.

Description of drawings

Fig. 1 is technological process of production figure of the present invention.

The specific embodiment

As shown in the figure, with the domestic waste crusher in crushing, enter separator after the fragmentation and carry out proportion selection by winnowing, magnetic separation, be divided into inorganic matter (being mainly fine sand, rubble etc.), organic waste and waste plastics three classes, inorganic matter is sent to system building materials system, adds curing agent and makes building materials; Waste plastics is sent to waste plastics processing system; Organic waste is admitted to hydrolytic decomposition pot and carries out self hydrolysis, utilizes cyclic steam that hydrolysis and dehydration are carried out simultaneously, is controlled under 8~10MPa air pressure, 150~200 ℃ of temperature and carries out 3.3 hours reaction.Dehydration is continued in the intact back of hydrolysis, until water content less than 20%.The quick-fried drying of spray after dehydration finishes, carry out sifting screen then, obtain inorganic matter, organic matter and waste plastics (inorganic matter and the waste plastics that obtain this moment are minute quantities) once more, send system building materials system after inorganic matter is pulverized, waste plastics is sent to waste plastics processing system, and organic matter is sent to the composting system.

Under water vapour and HTHP; hemicellulose deacetylation in the organic matter produces acetic acid; its effect of playing catalyst is (because the hydrolysis substance overwhelming majority is organic matter; the acetic acid amount that produces is more; need not to add acidic catalyst); starch in the organic matter can be converted into dextrin and compound sugar, cellulose conversion is short chain cellulose and compound sugar, and protein transduction changes into peptide class and amino acid.

The processing procedure of waste plastics processing system is as follows: waste plastics is pulverized, dwindled through low temperature hot gas, then add batchings such as coal, curing agent, enter then that streamline is irritated mould, fuel slug is made in moulding.

Organic composting system flow has two production lines (as required select): one be the organic matter fine powder broken after, after granulation, oven dry, cooling, make compoiste fertilizer; Another be the organic matter fine powder broken after, enter and cultivate the storehouse, add bacteria agent and cultivate, the acid pickle that is obtained by dehydration is as catalyst, cultivates after bio-bacterial manure is made in dehydration, granulation, oven dry, cooling.

Claims (4)

1, domestic rubbish disposal technology is characterized in that: with the house refuse crusher in crushing, enter separator after the fragmentation and carry out proportion selection by winnowing, magnetic separation, be divided into inorganic matter, organic waste and waste plastics three classes; Inorganic matter is sent to system building materials system, and waste plastics is sent to waste plastics processing system, and organic waste is admitted to hydrolytic decomposition pot and carries out self hydrolysis, dehydration in the time of hydrolysis, dehydration is continued in the intact back of hydrolysis, until water content less than 20%; The quick-fried drying of spray was carried out sifting screen then after dehydration finished, and obtained inorganic matter, organic matter and waste plastics, sent system building materials system after inorganic matter is pulverized, and waste plastics is sent to waste plastics processing system, and organic matter is sent to the composting system.
2, domestic rubbish disposal technology according to claim 1 is characterized in that utilizing cyclic steam that hydrolysis and dehydration are carried out simultaneously, and described organic waste carries out 3.0~3.5 hours hydrolysis under 6~12MPa air pressure, 100~300 ℃ of temperature.
3, domestic rubbish disposal technology according to claim 1 is characterized in that the processing procedure of described waste plastics processing system is as follows: waste plastics is pulverized, through the low temperature pyrocondensation, then added coal, curing agent is made fuel slug.
4, domestic rubbish disposal technology according to claim 1, the organic matter that it is characterized in that being sent to the composting system after fine powder is broken directly granulation make compoiste fertilizer; Also can add bacteria agent and cultivate, the acid pickle that dehydration obtains during by hydrolysis is as catalyst, and bio-bacterial manure is made in dehydration after cultivating, granulation.
CN 03150530 2003-08-18 2003-08-18 Life refuse treating process CN1274427C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 03150530 CN1274427C (en) 2003-08-18 2003-08-18 Life refuse treating process

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Application Number Priority Date Filing Date Title
CN 03150530 CN1274427C (en) 2003-08-18 2003-08-18 Life refuse treating process

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CN1583299A CN1583299A (en) 2005-02-23
CN1274427C true CN1274427C (en) 2006-09-13

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Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100434198C (en) * 2006-05-10 2008-11-19 张国利 Domestic garbage processing process
CN101088639B (en) * 2007-01-29 2010-10-27 胡海珊 Household refuse treating separator
CN101195121B (en) * 2007-02-28 2010-07-28 李华 Method for pollution-free processing, recycling urban pollutant and producing regeneration product
CN101884997B (en) * 2010-07-09 2013-10-30 深圳市兖能环保科技有限公司 Process for comprehensively treating garbage
CN102009057B (en) * 2010-09-16 2012-12-12 中山市祥源环保工程有限公司 House refuse treatment method
CN102327888B (en) * 2011-05-25 2014-08-13 严大春 Municipal domestic waste resource recovery processing method with zero pollution, zero release and harmlessness
CN102294348A (en) * 2011-09-16 2011-12-28 天津德为环保工程设备有限公司 High-efficient incineration generating system for municipal domestic wastes
CN102658282B (en) * 2012-04-28 2014-10-29 烟台大学 Method for quickly hydrolyzing organic waste
CN103506376B (en) * 2012-06-27 2016-02-03 瑞科际再生能源股份有限公司 The meticulous recycling processing method of one way of life rubbish
CN103506375B (en) * 2013-10-28 2015-09-30 林朴 A kind of garbage regeneration method and apparatus
CN103861863B (en) * 2014-03-21 2016-04-20 广州保绿环保科技有限公司 A kind of domestic waste Comprehensive utilization method
CN104384176B (en) * 2014-11-19 2016-09-14 晋江市冠兴建材有限责任公司 A kind of environment-friendly type cinder recovery and processing system
CN104761302B (en) * 2015-04-16 2017-10-03 项敬来 A kind of system for handling kitchen garbage
CN106824976A (en) * 2016-12-21 2017-06-13 四川雷鸣环保装备有限公司 The method for preparing derivatived fuel RDF raw materials, biological organic fertilizer raw material and inorganic building material raw material as raw material with rubbish
CN106892773A (en) * 2017-01-19 2017-06-27 吉林焕坤金浩生物科技有限公司 The resource utilization method of edible fungi residue
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
CN108723065A (en) * 2018-06-28 2018-11-02 深圳市有钱科技有限公司 A kind of method for separating of house refuse

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