CN105885952A - Waste carbon recycling method and system - Google Patents
Waste carbon recycling method and system Download PDFInfo
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- CN105885952A CN105885952A CN201610405903.7A CN201610405903A CN105885952A CN 105885952 A CN105885952 A CN 105885952A CN 201610405903 A CN201610405903 A CN 201610405903A CN 105885952 A CN105885952 A CN 105885952A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
- C10J3/60—Processes
- C10J3/64—Processes with decomposition of the distillation products
- C10J3/66—Processes with decomposition of the distillation products by introducing them into the gasification zone
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/723—Controlling or regulating the gasification process
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0903—Feed preparation
- C10J2300/0906—Physical processes, e.g. shredding, comminuting, chopping, sorting
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0946—Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
- C10J2300/1612—CO2-separation and sequestration, i.e. long time storage
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1671—Integration of gasification processes with another plant or parts within the plant with the production of electricity
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a waste carbon recycling method and system. A waste pretreatment device in the system is formed by sequentially connecting a bag breaking mechanism, a roller screen mechanism, a separation mechanism and a crushing mechanism; a rotating bed pyrolysis furnace is composed of a drying area, a first pyrolytic reaction area, a second pyrolytic reaction area and a third pyrolytic reaction area, the top of each area is provided with a high-temperature pyrolysis oil and gas outlet, and a radiant tube of each area is provided with a fuel gas inlet and a combustion gas outlet; the front end of the drying area is provided with a waste raw material inlet, and the tail ends of the three pyrolytic reaction areas are provided with discharging openings of pyrolytic carbon; a CO2 capturing device is formed by sequentially connecting an absorption tower, a rich liquid, a desorption tower, a reboiler, a gas-liquid separator, a barren liquor pump and a barren liquor cooler, and a first inlet of the absorption tower is connected with the combustion gas outlet; a feeding opening of a crusher is connected with a discharging opening of pyrolytic carbon; an inlet of a gasifier is connected with an outlet of the gas-liquid separator, and a feeding opening of pyrolytic carbon of the gasifier is connected with an outlet of a carbon storage tank of the crusher. By means of the waste carbon recycling method and system, it is beneficial to energy conservation and emission reduction, and economic benefits of living waste pyrolysis treatment are raised.
Description
Technical field
The invention belongs to the technical field that solid waste resource recovery processes, relate to a kind of rubbish charcoal resource
The method and system changed.
Background technology
Owing to China is faced with the dual-pressure of environment and the energy, along with adding that economy and urbanization are in progress
Speed, whole nation energy resource consumption is huge, and 2/3 big city faces garbage-surrounded city predicament simultaneously, by technology hands
House refuse is become available resources by section, can alleviate China's energy and environment danger to a certain extent
Machine.Domestic garbage pyrolysis technology is high with its resource utilization rate, the little advantage of environmental pollution increasingly by
People are favored.
Domestic garbage pyrolysis primary product has following several: partial thermal decomposition oil can be as fuel oil by refining
Use；Some low-molecular-weight hydrocarbons such as hydrogen, first can be included as the pyrolysis gas that fuel gas uses
Alkane, carbon monoxide etc.；Rubbish charcoal major part exists with white carbon black form, but has that heavy metal etc. is poisonous to be had
Pest matter, calorific value is low, and market outlet is poor；If used as solid fuel, combustion efficiency is poor,
And combustion process can produce a large amount of secondary pollution, environmental benefit is poor.Therefore, most of rubbish
Charcoal finally carries out landfill disposal only as pyrolysis residue, land occupation resource and cause the waste of the energy.
Along with expanding economy, carbon emission reduction has become the problem of concern.Domestic garbage pyrolysis treatment technology,
While realizing domestic garbage resource, also produce substantial amounts of CO2, CO2It is to cause global climate to become
One of warm main component of greenhouse gases, the contribution to greenhouse effect reaches about 55%, CO2It is again
The resource of a kind of preciousness, is widely used in food fresh keeping, oil recovery business, gas shielded arc welding and chemical industry
The fields such as synthesis, and obtain good economic benefit.
With CO2The production capacity increased is compared, the annual CO for producing consumption2It is one few that amount only accounts for total output
Part, substantial amounts of CO2Cannot be fully used and be discharged in air, aggravate greenhouse effect, become
The key factor of restriction Sustainable Development of Enterprises.No matter for resource or the angle of the energy, exploitation
More CO2It is all imperative for utilizing technology.If with CO2As gasifying agent, rubbish charcoal is as gas
Change the raw material production gasification gas technology rich in carbon monoxide, be on the one hand advantageously implemented the resource of rubbish charcoal
Change, on the other hand can realize CO2Inner loop utilize, reduce enterprise carbon emission amount.
The open one way of life refuse pyrolysis resource of one patent documentation (patent No. 201420457702.8)
Total system, this system by house refuse through pretreatment such as sorting, broken, drying, molding
After, in pyrolysis oven, it is pyrolyzed to obtain high-temperature oil gas and rubbish charcoal, generates gasification after the gasification of rubbish charcoal flammable
Gas, in order to the fuel as heat storage type gas radiation pipe burner.
Although this system uses gasification technology that rubbish charcoal is gasificated into combustible gas, but owing to using pretreatment
During the combustion tail gas of the air frowzy that produces and moisture vapor as the gasifying agent of rubbish charcoal,
It is relatively low that gasification produces combustible gas calorific value, and value is low.Additionally, due to use the burning of moisture vapor
Tail gas is as gasifying agent, and major gasification agent is water vapour, does not consider the CO in combustion tail gas2For gas
The effect of agent gasification rubbish charcoal, the most fully realizes CO2Recycle.
The patent disclosure one adverse current of another patent documentation (Patent No. 201210143133.5) turns
Domestic garbage pyrolysis carbide furnace system and garbage treating process, this system realizes house refuse and organic
Solid waste processes, and the product pyrolysis gas obtained is directly entered incinerator burning and produces 850 DEG C
The high-temp combustion tail gas of-1100 DEG C, rubbish charcoal is as final products.
This invention is, under conditions of heating anaerobic, life and organic solid waste are resolved into fuel gas and charcoal
Slag, combustible gas directly burns, and combustion tail gas, through purifying discharge, does not solve CO2Discharge capacity is high
Problem.It addition, this invention be the rubbish charcoal that domestic garbage pyrolysis is produced as final products, due to
Rubbish charcoal calorific value is relatively low, and market outlet is not smooth, and containing poisonous and harmful substances such as heavy metals, if will
Rubbish charcoal is as final products, and economic benefit is poor, and Technique Popularizing is relatively difficult.
In sum, the CO that prior art will not produce in domestic garbage pyrolysis technique2As gasification
Agent, rubbish charcoal is as gasified raw material, it is achieved meet again CO while rubbish charcoal resource2Inner loop profit
With.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide method and the realization of a kind of rubbish charcoal resource
The system of said method, it is achieved the resource of rubbish and CO2Recycle.
The present invention provides a kind of method of rubbish charcoal resource, and it comprises the following steps:
Pretreatment: rubbish sequentially passes through broken bag, roller screen, sorting and break process, obtains garbage raw material；
Refuse pyrolysis: the layer thickness of the described garbage raw material sending into revolving bed pyrolysis oven is 50-250mm,
Through the reaction being dried, be pyrolyzed and activating in described revolving bed pyrolysis oven, the material obtained includes heat
Solve carbon, combustion tail gas and pyrolysis oil gas；The time that revolving bed pyrolysis oven rotates a circle is 2-3h；
Broken pyrolytic carbon and CO2Trapping: through the particle diameter ＜ 13mm of the described pyrolytic carbon of crusher in crushing,；
Combustion tail gas in described revolving bed pyrolysis oven and the combustion tail gas in TRT pass through CO2Trapping dress
Put, isolate CO2Gas；
Gasification furnace gasifies: described isolated CO2Enter gasification furnace with described pyrolytic carbon to gasify, gas
Change temperature and be 900-1100 DEG C, produce gasification gas CO.
Described combustion tail gas enters CO2The absorption tower of capturing device, use alkanolamine solution as absorbent,
Contact with alkanolamine solution in absorption tower, the CO in described combustion tail gas2Absorbed by described alkanolamine solution and become
For rich solution, described rich solution is pumped into desorber through rich solution, and mixed gas after desorbing and lean solution are through cold
But device cooling down, the mixed gas after cooling enters gas-liquid separator, isolates CO2Gas.
Energy-conservation deacidification step is also included: after the process by described energy-conservation deacidification, institute after gasification furnace gasification
The temperature stating gasification gas is down to 250 DEG C-350 DEG C, sour gas volumetric concentration 0.05%.
The particle diameter ＜ 20mm of described garbage raw material, the moisture content of described garbage raw material is 40%-60%；
Energy-conservation deacidification process after also include gasify gas purifying step: the wet type in gas separating purifying device
Gas wash tower uses 70-80 DEG C of Quench recirculated water to spray described gasification gas, and the described gasification gas after dedusting is just
Cooler cools down, is then fed into detar in electrical tar precipitator, then by aerator by described gasification pneumatic transmission
To desulfurizing tower and denitrating tower, produce pure gasification gas CO；Wherein, described primary cooler recirculated water and
Chilled water is by described gasification air cooling to 20-25 DEG C, and the temperature of described recirculated water and described chilled water is respectively
For 30-35 DEG C and 15-20 DEG C.
The present invention also provides for a kind of system realizing above-mentioned rubbish charcoal method of resource, comprising:
Rubbish pretreatment unit: by broken bag mechanism, roller screen mechanism, sorting mechanism and crushing mechanism successively
Connecting and composing, described mechanism is respectively provided with charging aperture and discharging opening；
Revolving bed pyrolysis oven: by dry section, pyrolytic reaction one district, pyrolytic reaction two district and pyrolytic reaction
3rd district are constituted, and high temperature pyrolysis oil gas vent, the radial canal in each described district are arranged at the top in each described district
There are gas inlet and combustion tail gas gas outlet；There are garbage raw material entrance, institute in the front end of described dry section
The end stating pyrolytic reaction three district has the discharging opening of pyrolytic carbon；
CO2Capturing device is by absorption tower, rich solution pump, desorber, reboiler, gas-liquid separator, lean solution
Pump and lean solution cooler are sequentially connected with composition, and first entrance on described absorption tower goes out with described combustion tail gas
QI KOU is connected；The charging aperture of disintegrating machine is connected with the discharging opening of described pyrolytic carbon；
The entrance of gasification furnace is connected with the outlet of described gas-liquid separator, and the pyrolytic carbon of described gasification furnace enters
Material mouth exports with the storage charcoal groove of described disintegrating machine and is connected.
At CO2In capturing device, absorption tower the second entrance phase on absorbent pipeline and top, described absorption tower
Even, the absorption tower first at top, described absorption tower exports and is absorbed CO2After exhanst gas outlet be connected, institute
State the entrance of rich solution pump to be connected with absorption tower the second outlet bottom described absorption tower；Described rich solution pump
Outlet is connected with desorber first entrance on described desorber top；The entrance of described lean pump is with described
Desorber first bottom desorber exports and is connected；Bottom the entrance of described reboiler and described desorber
Desorber second export and be connected, described desorber the second entrance is connected with the outlet of described reboiler, institute
State the entrance of gas-liquid separator described in desorber the 3rd outlet at desorber top；Described lean pump
Outlet is connected with the entrance of described lean solution cooler.
In energy-saving denitration device, noble gas air accumulator is connected with inert gas duct, described energy-conservation
The gasification feed channel of denitrification apparatus is connected with gas separating purifying device；Described gas separating purifying device
By first gasification feed channel, wet dedusting tower, primary cooler, electrical tar precipitator, aerator, desulfurizing tower,
Denitrating tower is sequentially connected with composition, and the gas outlet of described denitrating tower is connected with the air inlet of air accumulator.
First gas outlet of described air accumulator is connected with the fuel inlet of revolving bed pyrolysis oven, described gas storage
Second gas outlet of tank is connected with TRT.
TRT includes gasify combustion chamber, waste heat boiler and steam turbine generator；Described gasification gas fires
Burn the gasification gas entrance of room and the second gas outlet of described air accumulator and described revolving bed high temperature pyrolysis oil gas
Outlet is connected, and the combustion air of described gasification combustion chamber is connected with air-blaster, described gasification gas
The combustion tail gas outlet of combustor is connected with described waste heat boiler；The combustion tail gas of described waste heat boiler goes out
Mouth is connected with described absorption tower the first entrance, superheated steam outlet and the described steamer of described waste heat boiler
The steam inlet of electromotor is connected.
According to the technique scheme of the present invention, make the CO produced in life refuse processing method2And rubbish
Charcoal is changed into combustible gas CO, has both reduced CO2Discharge capacity, it is achieved CO2Recycle, the most energy-conservation subtract
Row, realizes the purpose of rubbish charcoal resource the most to greatest extent, improves the level of resources utilization, increases warp
Ji benefit, and method flow is short, operating cost is low, easily realizes industrialization and scale.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of rubbish charcoal method of resource of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the detailed description of the invention of the present invention is carried out more detailed theory
Bright, so as to the advantage being more fully understood that the solution of the present invention and various aspects.But, below
The detailed description of the invention and the embodiment that describe are only descriptive purpose rather than limitation of the present invention.
The method of rubbish charcoal resource of the present invention includes pretreatment, refuse pyrolysis, broken pyrolytic carbon and CO2
The steps such as trapping, gasification furnace gasification.
Pretreatment refers to that rubbish sequentially passes through broken bag, roller screen, sorting and break process, obtains garbage raw material；
This step is by the bulk inorganic matter in rubbish, and metal etc. separates and crushes, and meets revolving bed pyrolysis oven
Pan feeding requirement to garbage raw material, the particle diameter ＜ 20mm of garbage raw material, the moisture content of garbage raw material is
40%-60%；
In refuse pyrolysis step, described garbage raw material being sent into revolving bed pyrolysis oven, described rubbish is former
The layer thickness of material is 50-250mm, through being dried, be pyrolyzed and activating in described revolving bed pyrolysis oven
Reaction, the material obtained includes pyrolytic carbon, combustion tail gas and pyrolysis oil gas；Revolving bed pyrolysis oven revolves
The time circled is 2-3h.
Broken pyrolytic carbon and CO2Trapping: through spiral discharging machine and by crusher in crushing to below 13mm；
Combustion tail gas in described revolving bed pyrolysis oven and the combustion tail gas in TRT pass through CO2Trapping dress
Put, isolate CO2Gas.
Described combustion tail gas enters CO2The absorption tower of capturing device, use alkanolamine solution as absorbent,
With alkanolamine solution counter current contacting in absorption tower, the CO in described combustion tail gas2Inhaled by described alkanolamine solution
Receipts become rich solution, and described rich solution is pumped into desorber through rich solution, and the mixed gas that desorbing generates includes
CO2Gas, steam and mist, the mixed gas after desorbing and lean solution cooled device cooling down, steam
Becoming water and foam with mist, the mixed gas after cooling enters gas-liquid separator, removes mixed gas
Interior water and foam, isolate CO2Gas.
The combustion tail gas feeding absorption tower through blower fan pressurization can come from revolving bed pyrolysis oven radial canal,
Can be from revolving bed pyrolysis oven radial canal and the combustor of TRT.
In gasification furnace gasification step, the described isolated CO of gasified raw material2With the institute as gasifying agent
Stating pyrolytic carbon entrance gasification furnace to gasify, gasification temperature is 900-1100 DEG C, produces gasification gas CO.
After gasification furnace gasification, step also includes energy-conservation deacidification step, after the process by described energy-conservation deacidification,
The temperature of described gasification gas is down to 250 DEG C-350 DEG C, sour gas volumetric concentration 0.05%.
Energy-conservation deacidification realizes waste heat recovery and deacidification, and noble gas can be carried out pre-by energy-conservation-deacidifying device
Heat, preheating temperature is up to about 210 DEG C, and is dried the noble gas after preheating, can be to life
Garbage raw material, percolate and pyrolysis sewage etc. are evaporated concentrating, it is achieved noble gas recycles.
Energy-conservation deacidification also includes the gas purifying step that gasifies, the wet type in gas separating purifying device after processing
Gas wash tower uses 70-80 DEG C of Quench recirculated water to spray described gasification gas, and the described gasification gas after dedusting is just
Cooler cools down, is then fed into detar in electrical tar precipitator, then by aerator by described gasification pneumatic transmission
To desulfurizing tower and denitrating tower, produce pure gasification gas CO.
Described primary cooler recirculated water and chilled water by described gasification air cooling to 20-25 DEG C, described circulation
The temperature of water and described chilled water is respectively 30-35 DEG C and 15-20 DEG C.
Energy-conservation deacidification gentle activating QI purifying step realize oil gas separation, gasification the dedusting of gas, desulfurization,
Denitrations etc., obtain pure gas activating QI CO, and a part of pure gas activating QI CO is as the benefit of radiant tube burner
Filling fuel, another part pure gas activating QI CO is as TRT fuel or other purposes.
The present invention realizes the system of above-mentioned rubbish charcoal method of resource and includes rubbish pretreatment unit, rotation
Bed pyrolysis oven, CO2Capturing device, gasification furnace.
Rubbish pretreatment unit is connected successively by broken bag mechanism, roller screen mechanism, sorting mechanism and crushing mechanism
Connecing composition, described mechanism is respectively provided with charging aperture and discharging opening.
Revolving bed pyrolysis oven is by dry section, pyrolytic reaction one district, pyrolytic reaction two district and pyrolytic reaction three
District is constituted, and the top in each described district has high temperature pyrolysis oil gas vent, the radial canal in each described district to have
Gas inlet and combustion tail gas gas outlet；There is garbage raw material entrance the front end of described dry section, described
The end in pyrolytic reaction three district has the discharging opening of pyrolytic carbon, the discharging opening of described pyrolytic carbon and crushing mechanism
Charging aperture be connected.
Revolving bed pyrolysis oven includes revolving bed pyrolysis oven, radiant tube burner, and cloth, discharging etc.
Auxiliary body.Its furnace bottom is rotating ring-shaped furnace bottom, in order to make material be heated evenly, and the material of furnace bottom
Perforated plate selected by plate.Radiant tube burner is arranged in annular furnace wall, is vented one's spleen by the combustion heat with heat radiation
Mode reaction institute calorific requirement is provided.
CO2Capturing device is by absorption tower, rich solution pump, desorber, reboiler, gas-liquid separator, lean solution
Pump and lean solution cooler are sequentially connected with composition, and first entrance on described absorption tower goes out with described combustion tail gas
QI KOU is connected；
At CO2In capturing device, absorption tower the second entrance phase on absorbent pipeline and top, described absorption tower
Even, the absorption tower first at top, described absorption tower exports and is absorbed CO2After exhanst gas outlet be connected, institute
State the entrance of rich solution pump to be connected with absorption tower the second outlet bottom described absorption tower；Described rich solution pump
Outlet is connected with desorber first entrance on described desorber top；The entrance of described lean pump is with described
Desorber first bottom desorber exports and is connected；Bottom the entrance of described reboiler and described desorber
Desorber second export and be connected, described desorber the second entrance is connected with the outlet of described reboiler, institute
State the entrance of gas-liquid separator described in desorber the 3rd outlet at desorber top；Described lean pump
Outlet is connected with the entrance of described lean solution cooler.
Pyrolysis gas as gasifying agent and the pyrolytic carbon as gasified raw material are admitted to gasification furnace, described gas
The pyrolysis gas entrance changing stove is connected with the outlet of described gas-liquid separator, and the pyrolytic carbon of described gasification furnace enters
Material mouth exports with the storage charcoal groove of described crushing mechanism and is connected.
In the energy-saving denitration device of present system, noble gas air accumulator and inert gas duct phase
Even, the gasification feed channel of described energy-saving denitration device is connected with gas separating purifying device；Described gas
Separating purifying device is by the first gasification feed channel, wet dedusting tower, primary cooler, electrical tar precipitator, drum
Blower fan, desulfurizing tower, denitrating tower are sequentially connected with composition, and the gas outlet of described denitrating tower is entered with air accumulator
QI KOU is connected.
Described air accumulator is used for storing gasification gas, and the first gas outlet of described air accumulator is pyrolyzed with revolving bed
The fuel inlet of stove is connected, and the second gas outlet of described air accumulator is connected with TRT.
Described TRT includes gasify combustion chamber, waste heat boiler and steam turbine generator, described gasification
Combustion chamber has gasification gas entrance, and combustion air inlet and exhanst gas outlet, described waste heat boiler has
Smoke inlet, exhanst gas outlet, boiler feedwater inlet and superheated steam outlet, described turbine generator facility
There are steam inlet, steam (vapor) outlet and electric quantity output end.The gasification gas entrance of described combustor and air accumulator
Second gas outlet is connected；The combustion air of described combustor is connected with air-blaster；Described combustor
Exhanst gas outlet be connected with waste heat boiler；The exhanst gas outlet of described waste heat boiler and described absorption tower first
Entrance is connected；The superheated steam outlet of described waste heat boiler is connected with steam turbine generator；Described steamer is sent out
The electric quantity output end of motor is connected with electrical equipment or electrical network.
During domestic garbage pyrolysis, revolving bed pyrolysis oven is needed to provide the energy for it, during this
Substantial amounts of CO can be produced2, the combustor of the gas electric generating apparatus that simultaneously gasifies also can produce substantial amounts of CO2, for
Reducing the carbon emission amount of enterprise, the present invention uses revolving bed radial canal burning gentle activating QI TRT combustion
Burn produce as gasifying agent, rubbish charcoal, as gasified raw material, makes CO2It is reduced to imflammable gas CO,
Realize CO2Recycle.
There is the poisonous and harmful substances such as heavy metal in rubbish charcoal, calorific value is low, and market outlet is poor, if made
When using for solid fuel, combustion efficiency is poor, and can produce substantial amounts of secondary pollution in combustion process
Thing, environmental benefit is poor, and the most most of rubbish charcoals are finally carried out at landfill only as pyrolysis residue
Reason, land occupation resource and cause the waste of the energy.
The CO that the present invention produces after using burning2As gasifying agent, rubbish charcoal, as gasified raw material, makes rubbish
Rubbish char combustion becomes imflammable gas CO, non-combustible gas CO2It is reduced to imflammable gas CO, it is achieved rubbish
Rubbish charcoal resource, also realizes CO simultaneously2Recycle, reduce enterprise carbon emission amount, make life rubbish
Rubbish pyrolytic technique has huge competitiveness in terms of economy, has greatly facilitated Technique Popularizing and has answered
With.
Embodiment
Using certain city's house refuse is raw material, and material composition composition is shown in Table 1 below.
Table 1 house refuse becomes to be grouped into (wt%)
The rubbish entering factory removes bulk inorganic matter and metal through simple sorting, then crushes, broken
The refuse pyrolysis raw material particle size ＜ 20mm obtained；
Broken rubbish is uniformly fed revolving bed pyrolysis oven, fabric thickness 100mm, in stove rubbish with
Furnace bottom to rotate through dry section, pyrolytic reaction one district, pyrolytic reaction two district and pyrolytic reaction three district complete
Become pyrolytic reaction, wherein dry section temperature 350 DEG C, pyrolytic reaction one district, pyrolytic reaction two district and pyrolysis
React three district's temperature 800 DEG C, response time 2-3h.
Revolving bed radial canal combustion tail gas and TRT combustion tail gas composition are shown in Table 2 below.
Table 2 TRT combustion tail gas composition
Use the system of the present invention, CO in combustion tail gas2The response rate is up to more than 90%, and purity is up to 98%
Above, charcoal conversion ratio reaches more than 97%, and gasification gas calorific value reaches 2679Kcal/Nm3, composition such as table 3 below
Shown in.
Table 3 house refuse becomes to be grouped into (wt%)
The beneficial effects of the present invention is:
Employing revolving bed pyrolysis oven is as the equipment of domestic garbage pyrolysis liquefaction, gas and charcoal, in a stove
Completing the process being dried, being pyrolyzed, flow process is short, and energy utilization rate is high, easily realizes scale simultaneously.
It is directly entered TRT, it is achieved the height of pyrolysis oil gas from revolving bed pyrolysis oven pyrolysis oil gas out
Effect utilizes, and saves the most again Oil-gas Separation purifier, reduces cost of investment and operation, maintenance cost.
Gasification gas realizes the removing of waste heat recovery and sour gas through energy-conservation-deacidifying device, improves energy
Utilization ratio, alleviate the sour gas corrosion to equipment.
With rubbish charcoal as gasified raw material, combustion tail gas and TRT that revolving bed pyrolysis road burning produces fire
Burn the isolated high concentration CO of combustion tail gas produced2As gasifying agent, use fluidized-bed gasification furnace gasification
Rubbish charcoal, solves rubbish charcoal calorific value low, and market outlet is not smooth, and the problem of deficiency in economic performance is the most real
Existing CO2Recycle, reduce charcoal discharge capacity.
Last it is noted that obvious, above-described embodiment is only by clearly demonstrating what the present invention was made
Citing, and not restriction to embodiment.For those of ordinary skill in the field, exist
Can also make other changes in different forms on the basis of described above.Here without also without
All of embodiment is given exhaustive by method.And the obvious change thus amplified out or variation
Among protection scope of the present invention.
Claims (10)
1. a method for rubbish charcoal resource, it comprises the following steps:
Pretreatment: rubbish sequentially passes through broken bag, roller screen, sorting and break process, obtains garbage raw material；
Refuse pyrolysis: the layer thickness of the described garbage raw material sending into revolving bed pyrolysis oven is 50-250mm,
Through the reaction being dried, be pyrolyzed and activating in described revolving bed pyrolysis oven, the material obtained includes heat
Solve carbon, combustion tail gas and pyrolysis oil gas；
Broken pyrolytic carbon and CO2Trapping: through the particle diameter ＜ 13mm of the described pyrolytic carbon of crusher in crushing；
Combustion tail gas in described revolving bed pyrolysis oven and the combustion tail gas in TRT pass through CO2Trapping dress
Put, isolate CO2Gas；
Gasification furnace gasifies: described isolated CO2Enter gasification furnace with described pyrolytic carbon to gasify, gas
Change temperature and be 900-1100 DEG C, produce gasification gas CO.
Method the most according to claim 1, it is characterised in that described combustion tail gas enters CO2
The absorption tower of capturing device, contacts with alkanolamine solution in absorption tower, the CO in described combustion tail gas2
Being absorbed by described alkanolamine solution and become rich solution, described rich solution is pumped into desorber through rich solution, after desorbing
Mixed gas and and lean solution cooled device cooling down, mixed gas after cooling enters gas-liquid separation
Device, isolates CO2Gas.
Method the most according to claim 1, it is characterised in that also include joint after gasification furnace gasification
Energy deacidification: after the process by described energy-conservation deacidification, the temperature of described gasification gas is down to 250 DEG C-350 DEG C,
Sour gas volumetric concentration 0.05%.
Method the most according to claim 3, it is characterised in that energy-conservation deacidification also includes after processing
Gasification gas purifies: the wet dedusting tower in gas separating purifying device uses 70-80 DEG C of Quench recirculated water spray
Spilling described gasification gas, the described gasification gas after dedusting cools down in primary cooler, is then fed into electrically trapped tar oil
Detar in device, then by aerator by described gasification pneumatic transmission to desulfurizing tower and denitrating tower, produce pure
Gasification gas CO；Described primary cooler recirculated water and chilled water by described gasification air cooling to 20-25 DEG C, institute
The temperature stating recirculated water and described chilled water is respectively 30-35 DEG C and 15-20 DEG C.
Method the most according to claim 1, it is characterised in that the particle diameter ＜ of described garbage raw material
20mm, the moisture content of described garbage raw material is 40%-60%.
6. realize a system for the described method of one of claim 1 to 5, comprising:
Rubbish pretreatment unit: by broken bag mechanism, roller screen mechanism, sorting mechanism and crushing mechanism successively
Connecting and composing, described mechanism is respectively provided with charging aperture and discharging opening；
Revolving bed pyrolysis oven: by dry section, pyrolytic reaction one district, pyrolytic reaction two district and pyrolytic reaction
3rd district are constituted, and high temperature pyrolysis oil gas vent, the radial canal in each described district are arranged at the top in each described district
There are gas inlet and combustion tail gas gas outlet；There are garbage raw material entrance, institute in the front end of described dry section
The end stating pyrolytic reaction three district has the discharging opening of pyrolytic carbon；
CO2Capturing device is by absorption tower, rich solution pump, desorber, reboiler, gas-liquid separator, lean solution
Pump and lean solution cooler are sequentially connected with composition, and first entrance on described absorption tower goes out with described combustion tail gas
QI KOU is connected；The charging aperture of disintegrating machine is connected with the discharging opening of described pyrolytic carbon；
The entrance of gasification furnace is connected with the outlet of described gas-liquid separator, and the pyrolytic carbon of described gasification furnace enters
Material mouth exports with the storage charcoal groove of described disintegrating machine and is connected.
System the most according to claim 6, it is characterised in that absorbent pipeline and described absorption
Absorption tower second entrance on tower top is connected, and the absorption tower first at top, described absorption tower exports and inhaled
Receive CO2After flue gas gas outlet be connected, the absorption tower bottom the entrance of described rich solution pump and described absorption tower
Second outlet is connected；Desorber the first entrance phase on described rich solution delivery side of pump and described desorber top
Even；The entrance of described lean pump is connected with desorber the first outlet bottom described desorber；Described again
The entrance of boiling device is connected with desorber the second outlet bottom described desorber, and described desorber second enters
Mouth is connected with the outlet of described reboiler, gas described in desorber the 3rd outlet at described desorber top
The entrance of liquid/gas separator；The outlet of described lean pump is connected with the entrance of described lean solution cooler.
System the most according to claim 7, it is characterised in that in energy-saving denitration device, lazy
Property gas storage tank is connected with inert gas duct, the gasification feed channel of described energy-saving denitration device and gas
Body separating purifying device is connected；Described gas separating purifying device is removed by the first gasification feed channel, wet type
Chimney, primary cooler, electrical tar precipitator, aerator, desulfurizing tower, denitrating tower are sequentially connected with composition, institute
The air inlet of the gas outlet and air accumulator of stating denitrating tower is connected.
System the most according to claim 8, it is characterised in that the first of described air accumulator is given vent to anger
Mouth is connected with the fuel inlet of revolving bed pyrolysis oven, the second gas outlet of described air accumulator and TRT
It is connected.
System the most according to claim 9, it is characterised in that TRT includes the gas that gasifies
Combustor, waste heat boiler and steam turbine generator；The gasification gas entrance of described gasification combustion chamber is with described
Second gas outlet of air accumulator is connected with described revolving bed high temperature pyrolysis oil gas vent, and described gasification gas fires
The combustion air burning room is connected with air-blaster, the outlet of the combustion tail gas of described gasification combustion chamber and
Described waste heat boiler is connected；Combustion tail gas outlet and described absorption tower first entrance of described waste heat boiler
Being connected, the superheated steam outlet of described waste heat boiler is connected with the steam inlet of described steam turbine generator.
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| CN201610405903.7A CN105885952A (en) | 2016-06-08 | 2016-06-08 | Waste carbon recycling method and system |
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| CN201610405903.7A CN105885952A (en) | 2016-06-08 | 2016-06-08 | Waste carbon recycling method and system |
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