CN207193196U - A kind of self-heating modified biomass Jiao demercuration adsorbent preparation facilities - Google Patents
A kind of self-heating modified biomass Jiao demercuration adsorbent preparation facilities Download PDFInfo
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- CN207193196U CN207193196U CN201720373760.6U CN201720373760U CN207193196U CN 207193196 U CN207193196 U CN 207193196U CN 201720373760 U CN201720373760 U CN 201720373760U CN 207193196 U CN207193196 U CN 207193196U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model proposes a kind of self-heating modified biomass Jiao demercuration adsorbent preparation facilities, and caused pyrolysis tail gas in biomass pyrolysis process is divided into two parts and is used.Wherein, Part I non-condensable gas is directly burnt as carrier gas needed for biomass pyrolysis process, Part II, and to heat Part I non-condensable gas, form biomass pyrolysis provides institute's calorific requirement, device is realized autothermal equilibrium in itself.The device can realize the full utilization of biomass pyrolytic tail gas, reach the purpose of energy-conserving and environment-protective.
Description
Technical field
It the utility model is related to environmental technology field, more particularly to pollutant mercury removal, and in particular to a kind of self-heating changes
Property biomass char demercuration adsorbent preparation facilities.
Background technology
Mercury is a kind of heavy metal contaminants with volatility, persistence and bioconcentration, be China's coal fired power plant after
The fourth-largest pollutant after dust, SOx, NOx.In coal-fired flue-gas, mercury is mainly with Elemental Mercury, gaseous state bivalent mercury and particulate Hg
Three kinds of forms are present.Wherein, gaseous state bivalent mercury has higher water solubility, can be in the existing wet desulphurization device of coal fired power plant
By efficient removal, particulate Hg then can be together removed in ash handling equipment with the flying dust in flue gas.But with gaseous state bivalent mercury and
Grain mercury is compared, and the removing of Elemental Mercury is then very difficult, because its highly volatile and being insoluble in water, is come for coal fired power plant
Say, how efficient removal Elemental Mercury is the key point for improving flue gas demercuration efficiency.
In order to improve the removal efficiency of Elemental Mercury in flue gas, scholars develop multiple technologies, such as sorbent injection technology
With catalytic oxidation technologies etc..Wherein industrial applications are sorbent injection technologies, and other technologies are also in research rank
Section.For sorbent injection technology, the selection of adsorbent is most important.The demercuration adsorbent researched and developed at present can be divided into carbon-based suction
Attached dose and the major class of non-carbon base adsorbent two, wherein demercuration efficiency highest is the acticarbon in carbon-based adsorbent.Although
Acticarbon can be with the mercury in efficient removal flue gas, and has obtained commercial Application in the U.S..But activated carbon
Cost is too high, and very big financial burden can be brought to coal fired power plant.For this problem, scholars propose that modification biological can be used
Matter Jiao substitutes acticarbon.Because biomass has wide material sources, rich reserves, clean environment firendly, cheap spy
Point, and the biomass char obtained by biomass pyrolytic has the flourishing pore structure similar to activated carbon, so by biomass char
Demercuration cost can be significantly reduced as demercuration adsorbent, is easy to commercial introduction and application.
The preparation of modified biomass Jiao demercuration adsorbent at present is all using needed for the offer of external heat source form biomass pyrolysis
Heat.Chinese invention patent ZL201410302007.9 discloses a kind of carbon-based demercuration adsorbent preparation facilities of biomass and side
Method, it is proposed that a kind of carbon-based demercuration adsorbent preparation facilities of fixed bed biomass, by biomass pyrolytic, modifier solution dipping with
And steam activation is integrated in set of device and carried out, it is possible to achieve the continuous preparation of the carbon-based demercuration adsorbent of biomass.But
Said apparatus needs to be additionally provided N in the carbon-based demercuration adsorbent of preparation biomass2As carrier gas, external heat source is also needed as biology
Matter pyrolysis provides institute's calorific requirement, and caused pyrolysis tail gas directly empties, and causes the waste of resource.
Utility model content
For prior art defect, the purpose of this utility model is to propose a kind of self-heating modified biomass Jiao demercuration absorption
Agent preparation facilities, caused pyrolysis tail gas in biomass pyrolysis process is divided into two parts and is used.Wherein, Part I is not
Condensable gases are directly burnt as carrier gas needed for biomass pyrolysis process, Part II, can not be cold to heat Part I
Solidifying gas, form biomass pyrolysis provide institute's calorific requirement, device is realized autothermal equilibrium in itself.The device can realize biomass thermal
The full utilization of tail gas is solved, reaches the purpose of energy-conserving and environment-protective.
For the above-mentioned purpose, the concrete technical scheme of the utility model use is：
A kind of self-heating modified biomass Jiao demercuration adsorbent preparation facilities, including：
One biomass pyrolysis system, to carry out pyrolytic reaction to biomass material；It has a pyrolysis gas outlet and one
Carrier gas inlet, connected between the pyrolysis gas outlet and carrier gas inlet by a pyrolysis cyclical pipeline assembly；
The pyrolysis cyclical pipeline assembly after the pyrolysis gas self-heating of discharging pyrolysis gas outlet as carrier gas conveying
To carrier gas inlet.
Further, the pyrolysis cyclical pipeline assembly includes：
It is communicated in a pyrolysis gas outlet pipeline of pyrolysis gas outlet；
The pyrolysis gas outlet pipeline is communicated in pyrolysis gas burning pipeline simultaneously by a connection piece and a pyrolysis gas changes
Thermal cycle pipeline；
The pyrolysis gas burning pipeline is provided with a fuel gas burner；
The pyrolysis gas recuperated cycle pipeline connection is provided with a combustible gas heat exchanger to carrier gas inlet；
The high-temperature tail gas outlet of the fuel gas burner is connected to a heat transferring medium entrance of combustible gas heat exchanger.
Further, the ratio between gas flow of the pyrolysis gas recuperated cycle pipeline and pyrolysis gas burning pipeline is 1:
3.5~6.5.
Further, the biomass pyrolysis system includes movable multi-layer heat treatment reactor, including：
One reactor body, reactor body offer foregoing pyrolysis gas outlet and carrier gas inlet；
It is arranged at a live spindle of reactor body center；
The multilayer laminate with stream material mouth is disposed with the reactor from top to bottom；
The live spindle is provided with dialling for corresponding multilayer laminate and sweeps structure, is swept biomass material to be dialled from each laminate
To laminate below.
Further, the biomass pyrolysis system also includes a biomass char collector, is pyrolyzed to biomass collection
System to biomass material by carrying out biomass char caused by pyrolytic reaction.
Further, in addition to：One feed system, to be fed to biomass pyrolysis system；
Modified agent solution supply system, modifier solution is sprayed into biomass material surface.
By taking above-mentioned technical proposal, biomass pyrolytic tail gas is divided into two parts and is used by the utility model, and one
Part is used as carrier gas needed for biomass pyrolysis process, and another part directly burns, and to heat Part I pyrolysis tail gas, makes a living
Material pyrolysis provides institute's calorific requirement.With two advantages, first, realizing the full utilization of biomass pyrolytic tail gas, make device sheet
Body realizes autothermal equilibrium, reaches the purpose of energy-conserving and environment-protective；Second, biomass pyrolytic tail gas has activation effect to biomass char, can
To improve the specific surface area of biomass char, dispersiveness of the modifying agent on biomass char surface can be both improved, life can be improved again
Adsorption capacity of material Jiao to mercury.
Brief description of the drawings
Fig. 1 is self-heating modified biomass Jiao's demercuration adsorbent preparation facilities arrangement in the embodiment of the utility model one
Schematic diagram.
Fig. 2 is the structural representation that movable multi-layer is heat-treated reactor in the embodiment of the utility model one.
Wherein：1-hopper, 2-pulverizer, 3-feeding screw, 4-movable multi-layer heat treatment reactor, 41- master
Axle, 42- laminates, 43-, which is dialled, sweeps structure, 5-constant flow pump, 6-modifying agent fluid reservoir, 7-nozzle, 8-air-introduced machine, 9-threeway,
10-fuel gas burner, 11-combustible gas heat exchanger, 12-biomass char collector.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clear, complete description.
As shown in figure 1, providing a kind of self-heating modified biomass Jiao demercuration adsorbent preparation facilities in one embodiment, wrap
Include：Biomass pyrolysis system, to carry out pyrolytic reaction to biomass material；There is a pyrolysis gas outlet and a carrier gas to enter for it
Mouthful, connected between pyrolysis gas outlet and carrier gas inlet by a pyrolysis cyclical pipeline assembly；Pyrolysis cyclical pipeline assembly is to general
After the pyrolysis gas self-heating of pyrolysis gas outlet discharge carrier gas inlet is delivered to as carrier gas；Feed system, to biomass thermal
Solution system is fed；Modifier solution supply system, modifier solution is sprayed into biomass material surface.
Wherein, feed system is made up of hopper 1, pulverizer 2, feeding screw 3, and biomass pyrolysis system is more by movable type
Layer heat treatment reactor 4, biomass char collector 12 form, and modifier solution supply system is by constant flow pump 5, modifying agent fluid reservoir
6th, nozzle 7 forms, and pyrolysis cyclical pipeline assembly is by air-introduced machine 8, threeway 9, fuel gas burner 10, combustible gas heat exchanger 11 and phase
The connecting line composition answered.The above-mentioned most equipment being related to or structure is already present in the prior art, or this area is common
, for their concrete mechanism and function, with reference to the introduction below with operation process, those skilled in the art are true from that can have
Fixed cognition, not most part, will not be repeated here.
Especially, as shown in Fig. 2 the concrete structure of movable multi-layer heat treatment reactor 4 is：It is more built in reactor body
Plate 42 layer by layer, per thering is what is be connected with main shaft 41 group to sweep structure 43 on plate 42 layer by layer.Biomass material after crushing enters through spiral
Glassware 3 enter reactor body after, main shaft 41 rotation drive under, dial sweep structure 43 can by biomass material dial be swept to lower floor
On laminate, so down run successively, until falling into biomass char collector 12.Biomass material in the process of running can be complete
Into the load of modifying agent, and dry and pyrolytic process；The speed of service and laminate of the biomass material in reactor body
Temperature can be adjusted according to demand, so as to strictly control pyrolytic process, ensure the product of modified biomass Jiao's demercuration adsorbent
Matter.The property that specific adjusting range and foundation refer to biomass obtains according to the technical knowledge in the field, no longer superfluous herein
State.
The primary structure that movable multi-layer is heat-treated high temperature electric furnace of the reactor with generally using is distinguished as：High-temperature electric
It can not realize continuous feeding and discharging to the structures shape of heating furnace, and movable multi-layer heat treatment reactor can then be realized continuously to enter
Discharging, can be with continuous production modified biomass Jiao's demercuration adsorbent.
The specific operation of device is：Hopper is connected with pulverizer entrance, for storing biomass material；Pulverizer goes out
Mouth is connected with feeding screw entrance, for crushed biomass raw material；Feeding screw exports anti-with movable multi-layer heat treatment
Device entrance is answered to be connected, for the biomass material after conveying crushing；There are movable multi-layer heat treatment reactor upper and lower two to go out
Mouthful, upper end outlet is connected with air-introduced machine entrance, and lower end outlet is connected with modified biomass Jiao's collector entrance, wherein, it is portable
Multi-layer thermal treatment reactor be used for feeding screw be sent into biomass material be modified agent solution dipping, and to dipping after
Biomass be pyrolyzed, biomass char collector is used to collect modified biomass Jiao's demercuration adsorbent for preparing；Air-introduced machine
Outlet is connected with threeway entrance, for drawing the biomass pyrolytic tail gas in movable multi-layer heat treatment reactor；Three are common to
Biomass pyrolytic tail gas is divided into two-way, the flue gas flow into burner can select about with entering the flue gas flow of reactor
1:3.5~6.5, specific flow proportional those skilled in the art can do corresponding selection according to the property of biomass, adjust, herein not
Repeat again.Fuel gas inlet wherein all the way with combustible gas heat exchanger is connected, and another way is connected with fuel gas burner entrance；It is flammable
Air burner outlet is connected with combustible gas heat exchanger smoke inlet, and tail gas is pyrolyzed for biomass burning；The combustible gas heat exchanger
From known products, preferably dividing wall type heat exchanger.Combustible gas heat exchanger gas outlet is heat-treated reactor phase with movable multi-layer
Even, for the biomass pyrolytic to be burnt in fuel gas burner tail gas institute liberated heat to be passed into another way biomass thermal
Tail gas is solved, caused cold flue gas is reduced to room temperature and directly emptied after heat exchange；Modifying agent fluid reservoir is connected with constant current pump intake, is used for
Store modifier solution；Constant current pump discharge is connected with nozzle, for the modifier solution in modifying agent fluid reservoir to be conveyed into spray
Mouth；Nozzle is placed in the top layer of movable multi-layer reactor, for spraying modifier solution.
The self-heating modified biomass Jiao's demercuration adsorbent preparation method realized by said apparatus, including following step
Suddenly：
Biomass material is selected from wood fiber biomass, preferably coconut husk, melon seed cases, rice husk.Biomass passes through natural wind
Hopper is directly placed into after dry.Biomass material after natural drying is sent into via hopper, pulverizer and feeding screw and moved
In formula multilayer pyrolysis reactor, for material when top layer pallet stops, the modifier solution configured is sprayed onto biomass by nozzle
Surface, under the effect of the high-temperature fuel gas of combustible gas combustion heat exchanger, pyrolytic reaction occurs；High temperature pyrolysis tail gas is by air-introduced machine
Draw, two-way is divided into after threeway, the first via enters fuel gas burner, and the second tunnel enters combustible gas heat exchanger, the first via
The high-temperature flue gas that combustible gas obtains after being burnt in fuel gas burner enters combustible gas heat exchanger, and will enter combustible gas and exchange heat
The second road combustible gas heating in device, the combustible gas of high temperature enters movable multi-layer pyrolysis reactor, so as to form biomass pyrolysis
Process provides heat；Modified biomass Jiao formed after pyrolysis is directly entered biomass char collector；The pulverizer can be by life
Raw material of substance is crushed to particle diameter and is less than 1mm, and the reaction temperature in the movable multi-layer pyrolysis reactor is 300-500 DEG C, Gu
The phase residence time is 120-240min, and the excess air coefficient of combustible gas and air burning in the fuel gas burner is
1.0-1.2, the combustible gas outlet temperature in the combustible gas heat exchanger is 550-900 DEG C, and the modifying agent is KCl, CaCl2、
KBr、CaBr2、KI、CaI2In one or more of mixtures, the mass concentration of the modifying agent is 1%-8%, the modifying agent
Solution and the mass ratio of biomass are 1:2-1:5.
Verify that the apparatus and method of the application prepare biomass char finished product by several groups of difference embodiments separately below
And preparation process.
Embodiment 1：
It is about 1mm that the coconut husk of natural air drying is crushed into particle diameter, and the reaction temperature of pyrolytic reaction is 500 DEG C, and solid phase stops
Time is 240min, and the excess air coefficient of combustible gas and air burning in fuel gas burner is 1.2, combustible gas heat exchanger
In combustible gas outlet temperature be 900 DEG C, the modifying agent be KCl, and the mass concentration of the modifying agent is 8%, and modifying agent is molten
Liquid and the mass ratio of biomass are 1:5, it is burnt that modified biomass is made.Exhaust emissions is cold flue gas, composition CO2And H2O。
It is burnt to modified biomass to carry out mercury adsorption test：From modified biomass Jiao's finished product of gained in embodiment 1, solid
Its absorption property is verified on fixed bed adsorption experiment platform.By simulated flue gas system occurs for fixture bed experiment platform, fixed bed reactors, surveys
Mercury instrument etc. forms, and wherein simulated flue gas is by high-purity N2Composition, simulated flue gas total flow is 2L/min.Mercury vapour is by being placed in U-shaped height
Mercury osmos tube in borosilicate glass tube produces, and caused mercury vapour is by high-purity N2Taken out of as carrier gas.As mercury vapour carrier gas
High-purity N2Throughput is 200ml/min, and remaining is the N as Balance Air2, the concentration of fixed bed entrance mercury vapour is 34.35 μ g/
m3.Adsorption temp is 150 DEG C, adsorption time 120min, and adsorbent useful load is 300mg.Test result shows, embodiment 1
The unit mercury adsorbance of middle modified biomass Jiao finished product is 33.26 μ g/g.
Embodiment 2：
It is about 0.6mm that the melon seed cases of natural air drying are crushed into particle diameter, and the reaction temperature of pyrolytic reaction is 300 DEG C, solid phase
Residence time is 120min, and the excess air coefficient of combustible gas and air burning in fuel gas burner is 1.0, and combustible gas changes
Combustible gas outlet temperature in hot device is 550 DEG C, and the modifying agent is KCl and CaCl2Mixing, the mass concentration of modifying agent are
1%, the mass ratio of modifier solution and biomass is 1:2, it is burnt that modified biomass is made.Exhaust emissions is cold flue gas, and composition is
CO2And H2O。
It is burnt to modified biomass to carry out mercury adsorption test with reference to the test parameters of embodiment 1：Test result shows, implements
The unit mercury adsorbance of modified biomass Jiao finished product is 32.75 μ g/g in example 2.
Embodiment 3：
It is about 0.75mm that the rice husk of natural air drying is crushed into particle diameter, and the reaction temperature of pyrolytic reaction is 420 DEG C, and solid phase is stopped
It is 200min to stay the time, and the excess air coefficient of combustible gas and air burning in fuel gas burner is 1.15, and combustible gas changes
Combustible gas outlet temperature in hot device is 700 DEG C, and the modifying agent is KBr, and the mass concentration of modifying agent is 6%, and modifying agent is molten
Liquid and the mass ratio of biomass are 1:4, it is burnt that modified biomass is made.Exhaust emissions is cold flue gas, composition CO2And H2O。
It is burnt to modified biomass to carry out mercury adsorption test with reference to the test parameters of embodiment 1：Test result shows, implements
The unit mercury adsorbance of modified biomass Jiao finished product is 33.11 μ g/g in example 2.
By adjusting modifier component, main adjustment mode refers to conventional used in the burnt preparation of existing modified biomass
Component, or other response parameters are adjusted in aforementioned range, obtain modified biomass Jiao and be respectively provided with very strong mercury adsorption capacity,
And in preparation process, caused tail gas is safe CO2And H2O。
To sum up, the apparatus and method of the application can realize the full utilization of biomass pyrolytic tail gas, efficiently solve and change
Property biomass char demercuration adsorbent preparation process in by be pyrolyzed tail gas directly empty caused by problem of resource waste, make to be modified life
The preparation process of material Jiao's demercuration adsorbent need not provide extra carrier gas and thermal source, device is realized autothermal equilibrium in itself.
Obviously, described embodiment is only the utility model part of the embodiment, rather than whole embodiments.It is based on
Embodiment in the utility model, those of ordinary skill in the art are obtained all under the premise of creative work is not made
Other embodiment, belong to the scope of the utility model protection.
Claims (6)
- A kind of 1. self-heating modified biomass Jiao demercuration adsorbent preparation facilities, it is characterised in that including：One biomass pyrolysis system, to carry out pyrolytic reaction to biomass material；It has a pyrolysis gas outlet and a carrier gas Entrance, connected between the pyrolysis gas outlet and carrier gas inlet by a pyrolysis cyclical pipeline assembly；The pyrolysis cyclical pipeline assembly as carrier gas after the pyrolysis gas self-heating of discharging pyrolysis gas outlet being delivered to load Gas entrance.
- 2. self-heating modified biomass Jiao demercuration adsorbent preparation facilities as claimed in claim 1, it is characterised in that the heat Solution circulation line component includes：It is communicated in a pyrolysis gas outlet pipeline of pyrolysis gas outlet；The pyrolysis gas outlet pipeline is communicated in pyrolysis gas burning pipeline by a connection piece simultaneously and pyrolysis gas heat exchange follows Endless tube road；The pyrolysis gas burning pipeline is provided with a fuel gas burner；The pyrolysis gas recuperated cycle pipeline connection is provided with a combustible gas heat exchanger to carrier gas inlet；The high-temperature tail gas outlet of the fuel gas burner is connected to a heat transferring medium entrance of combustible gas heat exchanger.
- 3. self-heating modified biomass Jiao demercuration adsorbent preparation facilities as claimed in claim 2, it is characterised in that the heat The ratio between the gas flow of recuperated cycle pipeline and the pyrolysis gas burning pipeline of venting one's spleen is 1:3.5~6.5.
- 4. self-heating modified biomass Jiao demercuration adsorbent preparation facilities as claimed in claim 1, it is characterised in that the life Material pyrolysis system includes movable multi-layer heat treatment reactor, including：One reactor body, reactor body offer foregoing pyrolysis gas outlet and carrier gas inlet；It is arranged at a live spindle of reactor body center；The multilayer laminate with stream material mouth is disposed with the reactor from top to bottom；The live spindle is provided with dialling for corresponding multilayer laminate and sweeps structure, and it is swept to biomass material to be dialled from each laminate On the laminate of lower section.
- 5. self-heating modified biomass Jiao demercuration adsorbent preparation facilities as claimed in claim 4, it is characterised in that the life Material pyrolysis system also includes a biomass char collector, to biomass collection pyrolysis system by being carried out to biomass material Biomass char caused by pyrolytic reaction.
- 6. self-heating modified biomass Jiao demercuration adsorbent preparation facilities as claimed in claim 4, it is characterised in that also wrap Include：One feed system, to be fed to biomass pyrolysis system；Modified agent solution supply system, modifier solution is sprayed into biomass material surface.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106893603A (en) * | 2017-04-11 | 2017-06-27 | 大唐环境产业集团股份有限公司 | A kind of self-heating modified biomass Jiao's demercuration adsorbent preparation facilities and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106893603A (en) * | 2017-04-11 | 2017-06-27 | 大唐环境产业集团股份有限公司 | A kind of self-heating modified biomass Jiao's demercuration adsorbent preparation facilities and method |
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