CN101097062A - City life refuse burning pretreatment method and apparatus for - Google Patents
City life refuse burning pretreatment method and apparatus for Download PDFInfo
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- CN101097062A CN101097062A CNA2006100894508A CN200610089450A CN101097062A CN 101097062 A CN101097062 A CN 101097062A CN A2006100894508 A CNA2006100894508 A CN A2006100894508A CN 200610089450 A CN200610089450 A CN 200610089450A CN 101097062 A CN101097062 A CN 101097062A
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Abstract
The invention discloses a burning fore treatment method of city life refuse, which is characterized by the following: proceeding pyrolytic reaction at 350-500 deg. c; getting solid residue; getting into refuse incinerator; burning; cooling thermal cracking gas above 10-60 deg. c; expelling evolution HCL; entering the gas into refuse incinerator; setting the device as refuse feed device and heat decomposition heat supply provided device; communicating with refuse heat decomposition reacting room; communicating the lower of the heat decomposition reacting room to the refuse incinerator; communicating the upper of the heat decomposition reacting room to cooling room; communicating gas outlet of the cooling room to gas inlet of HCl clean room; communicating the gas outlet of the HCl clean room to the refuse incinerator. This invention can expel HCl completely.
Description
Invention field
The invention belongs to the urban garbage disposal field, particularly a kind ofly combine,, realize low hydrogen chloride (HCl) and Di bioxin discharge in the burning city domestic garbage process processing method and device by the pyrolysis and the purification of chloride rubbish with incinerator.
Technical background
Burning is a kind of means of domestic waste harmlessness disposing, no matter be that domestic waste directly burns, combustible burns, or combustible prepares the garbage derivatived fuel after-combustion, all there are materials such as plastics class in the material that is burned, contain chlorine (Cl) element in these materials, Cl will produce sour gas HCl in combustion process, the existence of Cl element also is the necessary condition that generates dioxins materials.Because the highly acid of HCl He the hypertoxicity of dioxins materials make the generation of waste incineration secondary pollution and emission problem particularly people pay close attention to.
Generally by the control incineration temperature, prevent in the flue-gas temperature reduction process synthetic again, adopt that catalyst Shi bioxin decomposes, means such as the absorption of active carbon carbon and sack cleaner collection prevent the discharging of dioxins materials to atmosphere.And the mode that HCl gas generally adopts tail gas after incineration to purify is carried out, and utilizes alkaline matter that HCl is absorbed, and generates neutral salt.Though purifying, incineration tail gas can avoid the discharging of HCl to a great extent to atmosphere.But in combustion process, HCl gas may cause high temperature corrosion to the heat exchanger of boiler, for avoiding the generation of high temperature corrosion, the general steam that produces than low parameter (about 300 ℃), its generating efficiency less than 20%, and the generating efficiency of the coal-fired steam boiler of identical steam tonnage is about 30%, and the high temperature corrosion that HCl causes has had a strong impact on the recycling of rubbish.
Summary of the invention
The objective of the invention is to propose a kind of city life refuse burning pretreatment method.
Another object of the present invention provides the device of realizing said method.
For achieving the above object, the technical scheme that the present invention proposes, be to utilize thermal decomposition that the chlorine in the rubbish is separated out with the gaseous form of HCl, gaseous products is cooled to more than the dew-point temperature, utilizes the HCl in the gaseous material that acid gas removal separates out again, pure flammable gaseous material and thermal decomposition residue enter boiler combustion, realize low chlorine burning, minimizing produces HCl at burning process, avoids the generation of high temperature corrosion, and reduces the synthetic of combustion process Zhong dioxins materials.
Specifically, city life refuse burning pretreatment method provided by the invention is:
Under 350～500 ℃, domestic waste is carried out pyrolytic reaction, make rubbish generate the not chloride solid residue and the pyrolysis gas of chlorine-bearing compound, wherein solid residue enters the incinerator burning, pyrolysis air cooling is but to being higher than dew-point temperature 10-60 ℃, the HCl that separates out with acid gas removal again, the gas of removing HCl enters the incinerator burning, to reduce in the combustion process and the content of hydrogen chloride in the combustion tail gas.
Described method, wherein pyrolysis gas is cooled to 50～200 ℃.
Described method, wherein in the purified gas concentration of HCl less than 20mg/Nm
3
The device that is used to realize said method provided by the invention comprises garbage feeding device, thermal decomposition thermal source generator, rubbish pyrolysis chamber, cooling chamber, HCl clean room and incinerator; Wherein:
An one garbage feeding device and a thermal decomposition thermal source generator are communicated with rubbish pyrolysis chamber respectively;
The bottom of pyrolysis chamber is communicated with incinerator, and the top of pyrolysis chamber is communicated with cooling chamber; The gas vent of cooling chamber is communicated with the gas feed of HCl clean room, and the gas vent of this HCl clean room is communicated with incinerator;
Pending rubbish enters rubbish pyrolysis chamber via the garbage feeding device, and provides heat by thermal decomposition thermal source generator to rubbish pyrolysis chamber;
The solid residue of the indoor generation of rubbish pyrolysis enters the incinerator burning, and pyrolysis gas is removed HCl by the HCl clean room and entered the incinerator burning after cooling chamber is cooled to 50～200 ℃.
Described device, the indoor purification medium that adds HCl of rubbish pyrolysis wherein, this purification medium is that quick lime (calcium oxide), white lime (calcium hydroxide) are or/and NaOH.
Described device wherein is provided with a booster fan between cooling chamber and the HCl clean room, and the gas of cooling chamber is delivered to the HCl clean room.
Described device, wherein the garbage feeding device can adopt any in the following manner: screw feeder, hopper feed, conveyer belt feed.
Described device, wherein thermal decomposition thermal source generator should be able to provide 500 ℃～850 ℃ high temperature, and the medium of its use can be any in the following manner: high-temperature solid particle, high-temperature gas, high-temperature steam.
Described device, wherein the heat form of pyrolysis chamber is the hybrid of thermal source medium and rubbish blending, or the dividing wall type of thermal source medium and not blending of rubbish.
Described device, wherein the structure of pyrolysis chamber is spiral repulsive-type maglev or fluid bed strength repulsive-type maglev.
Described device, wherein solid residue enters incinerator by the pyrolysis chamber and can be in the following manner any: screw feeder, inclination feed, fluid bed pneumatic feeding.
Described device, wherein the cooling medium of cooling chamber can be any in the following material: boiler combustion air, boiler feedwater.
Described device, wherein the structure of clean room can be any in the following form: fluid bed, recirculating fluidized bed, fixed bed, gas scrubbing tower, absorption column of gas.
Described device, wherein the process for purifying of clean room can be any in the following form: wet method, semidry method, dry method.
Described device wherein is filled with purification medium in the clean room, and it can be in the following form any: lime stone (calcium carbonate), quick lime (calcium oxide), white lime (calcium hydroxide), NaOH, water, boiler fly ash.
Description of drawings
Fig. 1 is the structural representation of burning city domestic garbage pretreating device of the present invention.
Fig. 2 is the structure chart of the hybrid thermal decomposition chamber of the present invention.
Fig. 3 is the structure chart of dividing wall type thermal decomposition chamber of the present invention.
The specific embodiment
The invention provides a kind of method of burning city domestic garbage pre-treatment of low hydrogen chloride discharging, domestic waste is directly sent into the pyrolysis chamber, simultaneously provide heat to the pyrolysis chamber, heating rubbish to 350 ℃～500 ℃, make rubbish generation pyrolytic reaction generate pyrolysis gas and solid residue, solid residue is by conveying equipment and rely on the gravity of self to enter the incinerator burning, pyrolysis gas is collected through gas collector, enter cooling chamber with pyrolysis air cooling but to being higher than dew-point temperature 10-60 ℃, gas temperature final behind the process cooling chamber is between 50 ℃～200 ℃, the process clarifier is removed the HCl in the gas again, and the concentration of HCl is controlled at 20mg/Nm behind the process clarifier
3In, clean gas directly enters the incinerator burning.
Device of the present invention comprises garbage feeding device 1, thermal decomposition thermal source generator 2, rubbish thermal decomposition chamber 3, cooling chamber 4, booster fan 5, HCl clean room 6 and incinerator 7.
Wherein pyrolysis chamber 3 is installed on the rubbish feed path of incinerator 7, is connected with garbage feeding device 1, thermal decomposition thermal source generator 2, cooling chamber 4, incinerator 7 respectively;
The top of pyrolysis chamber 3 is provided with gas cooling chamber 4;
The outlet of HCl clean room 6 directly is connected with boiler 7.
When using this device, domestic waste directly enters pyrolysis chamber 3, provide the medium of energy also to enter pyrolysis chamber 3, through overheated transmission, make rubbish be heated to 350 ℃～500 ℃, the solid residue that generates is by conveying equipment and rely on the gravity of self to enter incinerator 7, the gaseous product that thermal decomposition produces is through being arranged in 3 sides, pyrolysis chamber and top gas collector collection, enter cooling chamber 4, gas temperature final behind the process cooling chamber is between 50 ℃～200 ℃, process clarifier 6 is removed the HCl in the gas again, and the concentration of HCl is controlled at 20mg/Nm behind the process clarifier
3In, clean gas directly enters incinerator 7 burnings.
To overcome the HCl that generates in the waste incineration process boiler is caused high temperature corrosion, when reducing the HCl concentration of emission, reduce the discharging of bioxin.
Embodiment 1
The overall structure of present embodiment as shown in Figure 1, the burning city domestic garbage pretreating device of the low hydrogen chloride discharging of the present invention comprises garbage feeding device 1, thermal decomposition thermal source generator 2, rubbish thermal decomposition chamber 3, cooling chamber 4, booster fan 5 and HCl clean room 6, thermal decomposition chamber 3 is positioned on the passage that rubbish feeds incinerator, directly connect garbage feeding device 1 and incinerator 7, thermal decomposition chamber 3 can adopt hybrid (as shown in Figure 2) and dividing wall type (as shown in Figure 3), the gas vent of thermal decomposition chamber 3 directly connects cooling chamber 4, booster fan 5 is installed to overcome the resistance of clean room 6 on the connecting line between cooling chamber 4 and the clean room 6, improve the negative pressure of thermal decomposition chamber 3 simultaneously, 6 fuel gas that purify directly enter incinerator 7 burnings through the clean room.
Garbage feeding device 1 can adopt any in the following manner: screw feeder, hopper feed, conveyer belt feed.
The medium that thermal decomposition thermal source generator 2 uses can be any in the following manner: the high-temperature solid particle, and high-temperature gas, high-temperature steam, electricity generally should be able to provide 500 ℃～850 ℃ high temperature.
The volume of thermal decomposition chamber 3 is decided according to the requirement of garbage disposal, generally should hold 30～300 seconds garbage treatment quantity.
The heat form of thermal decomposition chamber 3 can be any in the following manner: the hybrid of the medium of the energy and rubbish generation blending is provided, the medium of the energy and the dividing wall type that blending does not take place rubbish are provided.
When using the conduct of high-temperature solid particle that the medium of the energy is provided, the heat form of thermal decomposition chamber can be any in the following manner: hybrid and dividing wall type.
When using the conduct of high-temperature gas and high-temperature steam that the medium of the energy is provided, the heat form of thermal decomposition chamber only can be dividing wall type.
The version of thermal decomposition chamber 3 can be any in the following manner: spiral repulsive-type maglev, fluid bed strength repulsive-type maglev.
Can add the purification medium of HCl in the thermal decomposition chamber 3, purification medium can be quick lime (calcium oxide), white lime (calcium hydroxide), NaOH in the thermal decomposition chamber.
The temperature of cooling chamber 4 exit gas is decided according to the content of moisture in the gas and HCl, generally require final temperature than the dew-point temperature of gas high 10 ℃～60 ℃.
The cooling medium of cooling chamber 4 can be any in the following material: boiler combustion air, boiler feedwater.
The version of clean room 6 can be any in the following form: fluid bed, recirculating fluidized bed, fixed bed, gas scrubbing tower, absorption column of gas.
The process for purifying of clean room 6 can be any in the following form: wet method, semidry method, dry method.
The purification medium of clean room 6 can be any in the following form: lime stone (calcium carbonate), quick lime (calcium oxide), white lime (calcium hydroxide), NaOH, water, boiler fly ash.
The present invention is the thermal decomposition with chloride rubbish; particle mixes and transports; calcareous material removes the burning pretreating device that hydrogen chloride combines exploitation; by this device; rubbish is entered before the incinerator; remove the most of chlorine that wherein contains; especially the chlorine in the rubbish combustible; the chlorinity of the fuel that enters incinerator is reduced in original 10%; thereby HCl is with the generation of bioxin in the minimizing waste incineration process; avoided high temperature corrosion at the incinerator back-end surfaces; 10% of the quantity not sufficient flue gas of refuse burning amount of the gas of thermal decomposition simultaneously; the concentration of HCl is the several times of HCl concentration in the flue gas; be economy; the efficient HCl that removes provides feasible approach; in the clean room, carry out after HCl removes; clean gas enters the incinerator burning, and the original discharging of the HCl of incinerator can be lower than former incinerator exhaust through the discharging of the HCl behind the tail gas clean-up.
The present invention has that hydrogen chloride removes thoroughly, chlorine does not enter combustion process, it is to be processed harmful useless to need Narrow-minded, the suitable wide characteristics of the type of furnace.
Claims (15)
1, a kind of city life refuse burning pretreatment method, under 350～500 ℃, domestic waste is carried out pyrolytic reaction, make rubbish generate the not chloride solid residue and the pyrolysis gas of chlorine-bearing compound, wherein solid residue enters the incinerator burning, pyrolysis air cooling is but to being higher than dew-point temperature 10-60 ℃, remove the HCl that separates out with the acid gas removal agent again, the gas of removing HCl enters the incinerator burning, to reduce in the combustion process and the content of hydrogen chloride in the combustion tail gas.
2, the method for claim 1, wherein pyrolysis gas is cooled to 50～200 ℃.
3, the method for claim 1, wherein in the purified gas concentration of HCl less than 20mg/Nm
3
4, a kind of device that is used to realize the described method of claim 1 comprises garbage feeding device, thermal decomposition thermal source generator, rubbish pyrolysis chamber, cooling chamber, HCl clean room and incinerator; Wherein:
An one garbage feeding device and a thermal decomposition thermal source generator are communicated with rubbish pyrolysis chamber respectively;
The bottom of pyrolysis chamber is communicated with incinerator, and the top of pyrolysis chamber is communicated with cooling chamber; The gas vent of cooling chamber is communicated with the gas feed of HCl clean room, and the gas vent of this HCl clean room is communicated with the incinerator gas feed;
Pending rubbish enters rubbish pyrolysis chamber via the garbage feeding device, and provides heat by thermal decomposition thermal source generator to rubbish pyrolysis chamber;
The solid residue of the indoor generation of rubbish pyrolysis enters the incinerator burning, and pyrolysis gas is removed HCl by the HCl clean room and entered the incinerator burning after cooling chamber is cooled to 50～200 ℃.
5, device as claimed in claim 4, the indoor purification medium that adds HCl of rubbish pyrolysis wherein, this purification medium is that calcium oxide, calcium hydroxide are or/and NaOH.
6, device as claimed in claim 4 wherein is provided with a booster fan between cooling chamber and the HCl clean room, and the gas of cooling chamber is delivered to the HCl clean room.
7, device as claimed in claim 4, wherein the garbage feeding device can adopt any in the following manner: screw feeder, hopper feed, conveyer belt feed.
8, device as claimed in claim 4, wherein thermal decomposition thermal source generator should be able to provide 500 ℃～850 ℃ high temperature, and the medium of its use can be any in the following manner: high-temperature solid particle, high-temperature gas, high-temperature steam.
9, device as claimed in claim 4, wherein the heat form of pyrolysis chamber is the hybrid of thermal source medium and rubbish blending, or the dividing wall type of thermal source medium and not blending of rubbish.
10, device as claimed in claim 4, wherein the structure of pyrolysis chamber is spiral repulsive-type maglev or fluid bed strength repulsive-type maglev.
11, device as claimed in claim 4, wherein solid residue enters incinerator by the pyrolysis chamber and can be in the following manner any: screw feeder, inclination feed, fluid bed pneumatic feeding.
12, device as claimed in claim 4, wherein the cooling medium of cooling chamber can be any in the following material: boiler combustion air, boiler feedwater.
13, device as claimed in claim 4, wherein the structure of clean room can be any in the following form: fluid bed, recirculating fluidized bed, fixed bed, gas scrubbing tower, absorption column of gas.
14, as claim 4 or 13 described devices, wherein the process for purifying of clean room can be any in the following form: wet method, semidry method, dry method.
15, as claim 4 or 13 described devices, wherein be filled with purification medium in the clean room, it can be in the following form any: calcium carbonate, calcium oxide, calcium hydroxide, NaOH, water, boiler fly ash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100894508A CN100470131C (en) | 2006-06-28 | 2006-06-28 | City life refuse burning pretreatment method and apparatus for |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100894508A CN100470131C (en) | 2006-06-28 | 2006-06-28 | City life refuse burning pretreatment method and apparatus for |
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| CN101097062A true CN101097062A (en) | 2008-01-02 |
| CN100470131C CN100470131C (en) | 2009-03-18 |
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| CNB2006100894508A Active CN100470131C (en) | 2006-06-28 | 2006-06-28 | City life refuse burning pretreatment method and apparatus for |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363151A (en) * | 2011-06-28 | 2012-02-29 | 日照市福泰环保科技有限公司 | Low-temperature dry distillation and high-temperature quick thermal decomposition treatment process method for municipal domestic garbage |
| CN104248912A (en) * | 2013-06-28 | 2014-12-31 | 中国科学院大连化学物理研究所 | Low temperature thermal desorption catalytic degradation method of dioxins in garbage burning fly ash |
| CN106594748A (en) * | 2017-03-03 | 2017-04-26 | 广东天源环境科技有限公司 | Solid waste pyrogenation and combustion system |
| CN109959015A (en) * | 2017-12-22 | 2019-07-02 | 上海市机电设计研究院有限公司 | Domestic refuse incinerator is fed half pyrolysis installation and method |
| CN111100684A (en) * | 2019-12-27 | 2020-05-05 | 青岛惠城环保科技股份有限公司 | Process method for dechlorinating waste plastic in cracking process |
| CN111330942A (en) * | 2020-02-28 | 2020-06-26 | 上海交通大学 | Low temperature pre-dechlorination method and device for low dioxin thermochemical conversion process |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1318321B1 (en) * | 2000-02-18 | 2003-08-25 | Tesi Ambiente S R L | PLANT FOR THE TREATMENT OF WASTE FUELS. |
| CN2525381Y (en) * | 2001-10-16 | 2002-12-11 | 北京开元国泰环境工程有限公司 | New high efficiency refuse pyrolytic incinerator |
| JP3900951B2 (en) * | 2002-02-07 | 2007-04-04 | 株式会社明電舎 | Thermal decomposition method and facility |
| CN1172111C (en) * | 2002-12-24 | 2004-10-20 | 鞍山热能研究院 | Slag incinerator for treating hazardous wastes and medical garbage and process method |
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2006
- 2006-06-28 CN CNB2006100894508A patent/CN100470131C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363151A (en) * | 2011-06-28 | 2012-02-29 | 日照市福泰环保科技有限公司 | Low-temperature dry distillation and high-temperature quick thermal decomposition treatment process method for municipal domestic garbage |
| CN102363151B (en) * | 2011-06-28 | 2013-12-25 | 日照市福泰环保科技有限公司 | Low-temperature dry distillation and high-temperature quick thermal decomposition treatment process method for municipal domestic garbage |
| CN104248912A (en) * | 2013-06-28 | 2014-12-31 | 中国科学院大连化学物理研究所 | Low temperature thermal desorption catalytic degradation method of dioxins in garbage burning fly ash |
| CN106594748A (en) * | 2017-03-03 | 2017-04-26 | 广东天源环境科技有限公司 | Solid waste pyrogenation and combustion system |
| CN109959015A (en) * | 2017-12-22 | 2019-07-02 | 上海市机电设计研究院有限公司 | Domestic refuse incinerator is fed half pyrolysis installation and method |
| CN111100684A (en) * | 2019-12-27 | 2020-05-05 | 青岛惠城环保科技股份有限公司 | Process method for dechlorinating waste plastic in cracking process |
| CN111330942A (en) * | 2020-02-28 | 2020-06-26 | 上海交通大学 | Low temperature pre-dechlorination method and device for low dioxin thermochemical conversion process |
| CN111330942B (en) * | 2020-02-28 | 2021-11-23 | 上海交通大学 | Low temperature pre-dechlorination method and device for low dioxin thermochemical conversion process |
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| CN100470131C (en) | 2009-03-18 |
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