CN105861012A - Coal-pyrolysis-device and pulverized-coal-boiler combination system and method for treating coal - Google Patents
Coal-pyrolysis-device and pulverized-coal-boiler combination system and method for treating coal Download PDFInfo
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- CN105861012A CN105861012A CN201610431821.XA CN201610431821A CN105861012A CN 105861012 A CN105861012 A CN 105861012A CN 201610431821 A CN201610431821 A CN 201610431821A CN 105861012 A CN105861012 A CN 105861012A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/18—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with moving charge
- C10B47/20—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with moving charge according to the moving bed type
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/005—After-treatment of coke, e.g. calcination desulfurization
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/18—Modifying the properties of the distillation gases in the oven
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C1/00—Working-up tar
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides a coal-pyrolysis-device and pulverized-coal-boiler combination system and a method for treating coal. The coal-pyrolysis-device and pulverized-coal-boiler combination system comprises a rapid pyrolysis reactor, a pulverized coal boiler and a pyrolysis-oil-gas treating system. The rapid pyrolysis reactor comprises a plurality of heat-storage-type radiant tubes, a semi-coke outlet, a particle moving bed and a pyrolysis gas outlet. The particle moving bed comprises a shell and a board inserting valve; the shell is connected with the inner wall of a reactor body so that the inside space of the particle moving bed can be limited; the pulverized coal boiler is communicated with the rapid pyrolysis reactor through the semi-coke outlet, and the pyrolysis-oil-gas treating system is communicated with the rapid pyrolysis reactor through the pyrolysis gas outlet. By means of the a coal-pyrolysis-device and pulverized-coal-boiler combination system and the method for treating coal, dust existing in pyrolysis gas can be effectively removed, the content of heavy components of tar is decreased, and the following treating cost of the tar is reduced; meanwhile, pyrolysis products are reasonably used, and generating cost is reduced.
Description
Technical field
The invention belongs to coal sublevel cascade utilization technical field, be specifically related to pyrolysis of coal device and coal
Powder boiler combined system and the method processing coal.
Background technology
The semicoke produced after pyrolysis of coal can be as fuel-fired power generation, and existing pyrolysis of coal plug
Technique is mainly for recirculating fluidized bed generating set.As process institute of the Chinese Academy of Sciences and Zhejiang University utilize and follow
The heat ash that circulation fluidized bed boiler produces is as heat carrier, and utilizes down-flow fluidized bed using ECT technique to achieve coal heat
Solve, and petroleum vapor recovery.Existing system is owing to taking more complicated solid or gas heat carrier
Pyrolysis of coal plug technique, and the petroleum resources produced by pyrolytic process of coal, for electricity generation system
For, need to be equipped with corresponding oil vapor treatment system.The configuration of the most existing system is various, and cost is held high
Expensive.A kind of furnace front coal head-drawing method that patent of invention CN101435574A is mentioned, this technique is pyrolyzed
The heat that system takes combustion system is grey as carrier.Relate to burning and the fluidisation of carrier, quite
In adding again a set of circulating fluidized bed system, technique is cumbersome.Utility model patent
CN203048897U refer to a kind of IGCC technique taking furnace front coal head-drawing.IGCC, the most whole
Body coal gasification gas combustion-gas vapor combined cycle.This system includes pyrolysis and multiple unit that gasifies, and produces
The existing oil of product, has again combustible gas, also needs to configure jet dynamic control, and system complex, cost are high.
In China's electricity generation system, pulverized-coal fired boiler proportion is the highest.Due to coal-powder boiler burning to coal volatile matter and
Particle size requirements is higher, and therefore coal plug is the most little for the technique of coal-powder boiler.
Coal sample completely cuts off air heating under prescribed conditions, and the organic substance decomposes in coal goes out one
Liquid (being now steam condition) that fractionated molecule amount is less and gaseous products, these products are referred to as waving
Stimulating food.Volatile matter accounts for the mark of coal sample quality becomes volatile producibility or referred to as volatile matter.
Coal plug, it is intended to normal pressure, middle low temperature, without catalyst and hydrogen under conditions of, by gentle heat
The mode solved extracts the gas in coal, liquid fuel and fine chemicals, and technique desulfurization whereby,
Denitration, thus realize oil, coal air and heat, the Poly-generation of electricity.
Summary of the invention
The problem existed for above prior art, the present invention proposes pyrolysis of coal device and pulverized-coal fired boiler
Combined system and the method processing coal, it is possible to effectively remove dust present in pyrolysis gas, improve Jiao
Oil quality is high, reduces the complexity of pyrolytic process of coal, reduces the processing cost of follow-up tar, meanwhile,
Appropriate application thermal decomposition product, reduces cost of electricity-generating.
The present invention proposes pyrolysis of coal device and pulverized-coal fired boiler combined system, including: fast pyrogenation reacts
Device, pulverized-coal fired boiler and pyrolysis oil gas processing system,
Described fast pyrolysis reactor includes that reactor body, described reactor body limit reaction
Space, described reaction compartment is divided into feed zone, pyrolysis zone and discharge zone from top to bottom；
Described pyrolysis zone is provided with multilamellar heat accumulation type radiant tube, and described multilamellar heat accumulation type radiant tube is described
In pyrolysis zone spaced apart along described reactor body short transverse, and every layer of described heat accumulating type spoke
Penetrate pipe and include the heat accumulation type radiant tube of multiple horizontally spaced distribution；
Described discharge zone is provided with semicoke outlet, granular bed and pyrolysis gas outlet；Described semicoke
Outlet is positioned at the bottom of described reactor body, and the semicoke after pyrolysis is discharged described reactor originally
Body；Described granular bed includes housing and push-pull valve, described housing and described reactor body
Inwall is connected, and thus limits the inner space of described granular bed, the top of described housing and
Bottom end opening, described push-pull valve is positioned at the bottom of described housing, and the handwheel of described push-pull valve is by described
Reactor body is outside through inwall, thus makes the plate end as described housing of described push-pull valve
Portion；Described pyrolysis gas outlet is positioned on the sidewall of the described reactor body corresponding to described housing；
Described pulverized-coal fired boiler is communicated with described fast pyrolysis reactor by the outlet of described semicoke；
Described pyrolysis oil gas processing system is reacted with described fast pyrogenation by described pyrolysis gas outlet
Device communicates.
Pyrolysis of coal device as above and pulverized-coal fired boiler combined system, wherein, described pyrolysis oil gas
Processing system farther includes oil and gas separating system, pyrolysis gas cleaning system and tar refining system
System, wherein, described pyrolysis gas outlet is connected with described oil and gas separating system, described Oil-gas Separation
The gas outlet of system is connected with described pyrolysis gas cleaning system, the liquid of described oil and gas separating system
Outlet is connected with described tar refining system.
Pyrolysis of coal device as above and pulverized-coal fired boiler combined system, wherein, farther include system
Powder system, described pulverized-coal fired boiler is connected with the outlet of described semicoke by described pulverized coal preparation system.
Pyrolysis of coal device as above and pulverized-coal fired boiler combined system, wherein, every layer of described accumulation of heat
Formula radial canal includes multiple parallel and equally distributed heat accumulation type radiant tube, and each described accumulation of heat
Formula radial canal is parallel with each heat accumulation type radiant tube in adjacent upper and lower two-layer heat accumulation type radiant tube
And it is in staggered distribution along the body height direction of described pyrolysis of coal reactor.
Pyrolysis of coal device as above and pulverized-coal fired boiler combined system, wherein, described granule moves
Bed farther includes the first interlayer, and described first interlayer is positioned at described enclosure interior, with described reaction
Device inner body wall limits space, and described first interlayer surface has loose structure.
Pyrolysis of coal device as above and pulverized-coal fired boiler combined system, wherein, described first interlayer
And the distance between described reactor body is less than 5cm.
Pyrolysis of coal device as above and pulverized-coal fired boiler combined system, wherein, described granule moves
Bed farther includes the second interlayer, and described second interlayer is arranged in parallel with described first interlayer,
Described second interlayer and described inner walls limit space, and described second interlayer surface has porous
Structure.
The method processing coal with pyrolysis of coal device described above and pulverized-coal fired boiler combined system, including with
Lower step:
A, utilize described fast pyrolysis reactor that feed coal is carried out pyrolysis processing, obtain semicoke and
Pyrolysis gas；
B, described semicoke is sent to pulverized-coal fired boiler, makes described semicoke and the coal in described pulverized-coal fired boiler
Powder carries out mixed combustion, obtains heat smoke；
C, described pyrolysis gas is sent to described pyrolysis by the described pyrolysis gas outlet of described discharge zone
Oil vapor treatment system, thus described pyrolysis oil gas is processed, obtain combustible gas.
Method as above, described semicoke and feed coal take a step forward at entrance pulverized-coal fired boiler and include
Step D, described step D includes:
Described semicoke and feed coal are put in pulverized coal preparation system and pulverizes, obtain fine particle
Semicoke and the mixed-powder of coal.
Method as above, described pyrolysis gas is sent to described pyrolysis oil by described pyrolysis gas outlet
Farther including step E after gas processing system, described step E includes: described pyrolysis gas enters oil
Gas separating system, obtains the gas after gas-liquid separation and liquid, and described liquid is through tar rectification systems
Obtaining tar after process, described gas obtains pyrolysis gas after pyrolysis gas cleaning system processes.
Fast pyrolysis reactor described in the application of the invention, uses heat accumulation type radiant tube formula descending
Bed processes fine coal, it is possible to the effective pyrolysis particle diameter fine coal less than 3mm.
By using heat accumulation type radiant tube formula down-flow fluidized bed using ECT, pyrolysis petroleum resources is through bottom particles moving bed
Removing dust present in pyrolysis gas, the dustiness in pyrolysis gas declines, pyrolysis gas and the product of tar
Matter improves, and the pretreatment cost that tar refining processes reduces.High-temperature semi-coke is in high temperature pyrolysis oil gas
Heavy tar components have second pyrolysis effect so that pyrolysis gas productivity increase.Under total tar yield
Fall, in tar, light components productivity rises, and heavy component productivity declines.
By using heat accumulation type radiant tube to combine down-flow reactor, belong to heating indirectly, it is achieved coal
The fast pyrogenation of charcoal, member-retaining portion raw coal fugitive constituent, such pyrolysis reactor allows with existing
Pulverized-coal fired boiler is directly combined, and without existing pulverized-coal fired boiler is transformed on a large scale.
Export by arranging semicoke, pyrolysis char is sent into pulverized-coal fired boiler, improve the energy of electricity generation system
Amount utilization rate.
Accompanying drawing explanation
By the detailed description made in conjunction with the following drawings, the present invention's is above-mentioned or otherwise interior
Hold and will be apparent from and be easier to understand, wherein:
Fig. 1 is the structural representation of pyrolysis of coal device of the present invention and pulverized-coal fired boiler combined system；
Fig. 2 is the process chart of pyrolysis of coal device of the present invention and pulverized-coal fired boiler combined system；
Fig. 3 is the structural representation of fast pyrolysis reactor in the present invention；
Fig. 4 is the front view of the granular bed of fast pyrolysis reactor in the present invention；
Fig. 5 is the granular bed top view of fast pyrolysis reactor in the present invention；
Fig. 6 is the structural representation of the push-pull valve of fast pyrolysis reactor in the present invention.
In accompanying drawing, each label is expressed as follows:
100: fast pyrolysis reactor；
1: reactor body, 11: feed zone, 12: pyrolysis zone, 13: discharge zone；
2: heat accumulation type radiant tube；
3: granular bed, 31: housing, 32: push-pull valve, 321: handwheel, 322: plate,
33: the first interlayers, 34: the second interlayers；
4: pyrolysis gas outlet；
5: semicoke；
6: material inlet；
7: semicoke exports；
200: pulverized-coal fired boiler；
300: pyrolysis oil gas processing system；
301: oil and gas separating system, 302: pyrolysis gas cleaning system, 303: tar refining system；
400: pulverized-coal fired boiler.
Detailed description of the invention
Describe the detailed description of the invention of the present invention below in conjunction with the accompanying drawings in detail.
Detailed description of the invention/the embodiment recorded at this is the specific specific embodiment party of the present invention
Formula, for the design of the present invention is described, is all explanatory and exemplary, should not be construed as this
Invention embodiment and the restriction of the scope of the invention.In addition to the embodiment recorded at this, this area skill
Art personnel can also based on the application claims and description disclosure of that use aobvious and
Other technical scheme being clear to, these technical schemes include using doing the embodiment recorded at this
Go out the technical scheme of any obvious substitutions and modifications, all protection scope of the present invention it
In.
Fig. 1 is the structural representation of pyrolysis of coal device of the present invention and pulverized-coal fired boiler combined system.Such as figure
Shown in 1, pyrolysis of coal device proposed by the invention and pulverized-coal fired boiler combined system include fast pyrogenation
Reactor 100, pulverized-coal fired boiler 200 and pyrolysis oil gas processing system 300.
Fig. 3 is the structural representation of fast pyrolysis reactor 100 in the present invention.As it is shown on figure 3,
The fast pyrolysis reactor 100 that the present invention proposes includes reactor body 1.
Described reactor body 1 limits reaction compartment, and described reaction compartment can be divided into from top to down
Feed zone 11, pyrolysis zone 12 and discharge zone 13.
Described feed zone 11 includes material inlet 6.Described material inlet 6 is positioned at described reactor
The top of body 1.
Concrete, described material inlet 6 can be arranged in described reactor body 1 top as far as possible
Center, it is simple to entering into the material in reactor from described material mouth 6 can be scattered uniformly
Inside described pyrolysis zone 12.
Further, the reaction temperature in reactor body 1 is 500 DEG C～700 DEG C, and pressure is less than
8kPa.The material particular diameter entered in described pyrolysis zone 12 should be less than 3mm.
Described pyrolysis zone 12 includes multilamellar heat accumulation type radiant tube 2.Described multilamellar heat accumulation type radiant tube 2
In described pyrolysis zone 12 spaced apart along described reactor body 1 short transverse, and every layer
Described heat accumulation type radiant tube 2 includes the heat accumulation type radiant tube 2 of multiple horizontally spaced distribution.
Further, every layer of described heat accumulation type radiant tube 2 includes multiple parallel and equally distributed
Heat accumulation type radiant tube 2, and every layer of heat accumulation type radiant tube 2 is flat with upper and lower two-layer heat accumulation type radiant tube 2
OK, and along reactor body 1 short transverse it is interspersed.
Concrete, as it is shown in figure 1, the external diameter of described heat accumulation type radiant tube 2 is 200～300mm.
Horizontal range between adjacent described heat accumulation type radiant tube 2 outer wall is 200～500mm, vertical distance
200～700mm.The number of plies of described multilamellar heat accumulation type radiant tube 2 can be 10～25 layers.Through invention
People finds, this kind of structure is arranged so that uniform distribution of temperature field in pyrolysis zone, such that it is able to aobvious
Write the fast pyrogenation efficiency improving material, and then improve the productivity of tar.
In the present invention, heat accumulation type radiant tube 2 is regenerative gas radial canal, i.e. by radial canal pipe
The heat that combustion gas is produced by body carries out heat supply in the way of radiation.Thus, it is possible to by adjusting
The flow being passed through the combustion gas in heat accumulation type radiant tube 2 realizes the control of the temperature to pyrolytic process, from
And the fast pyrogenation efficiency of material can be significantly improved, and then improve the productivity of tar.
In the present invention, described heat accumulation type radiant tube 2 can also be by burner or other heating plant generations
Replacing, its technical scheme is not limited solely to this.
As it is shown in figure 1, described discharge zone 13 includes semicoke outlet 7.Described semicoke exports 7
In the bottom of described reactor body 1, for the pyrolysis char 5 after pyrolysis is discharged described reaction
Device body 1.
Concrete, described discharge zone 13 can be in inverted cone.Thus, it is possible to make pyrolysis generate
Semicoke 5 discharge discharge zone 13 smoothly.Described semicoke outlet 7 should be arranged in as far as possible described instead
Answer the center of device body 1 bottom, it is simple to the semicoke 5 in discharge zone 13 is discharged instead smoothly
Answer outside device.
Granular bed 3 is used for removing dust present in pyrolysis gas.As shown in Figure 4, described
Grain moving bed 3 includes housing 31 and push-pull valve 32.Described housing 31 is with described reactor originally
Body 1 inwall is connected, and thus limits the inner space of described granular bed 3.Described housing
The top of 31 and bottom end opening, described push-pull valve 32 is positioned at the bottom of described housing 31.Such as Fig. 6
Shown in, the handwheel 321 of described push-pull valve 32 is outside through inwall by described reactor body 1,
Thus make the plate 322 bottom as described housing 31 of described push-pull valve 32.
The semicoke 5 that pyrolysis produces falls into the inside of granular bed 3.High-temperature hot is vented one's spleen through granule
Semicoke 5 within moving bed 3, the dust in pyrolysis gas is removed.By controlling granular bed
Push-pull valve 32 bottom 3 controls the translational speed of the semicoke 5 in granular bed 3.Granule moves
Movable bed internal particle translational speed is preferably less than 1m/s (meter per second).
Pyrolysis gas outlet 4 is positioned at the sidewall of the described reactor body 1 corresponding to described housing 31
On.
Further, described fine coal rapid pyrolysis apparatus also includes the first interlayer 33.Such as Fig. 5 institute
Showing, described first interlayer 33 is positioned at the inside of described housing 31, and in described reactor body 1
Wall limits space, and described first interlayer 33 surface has loose structure.
The loose structure on described first interlayer 33 surface, the pyrolysis gas helped to create passes through first
Interlayer 33 enters into pyrolysis gas outlet 4.Meanwhile, described first interlayer 33 has filtration,
Can effectively remove dust present in pyrolysis gas, improve pyrolysis gas quality.
Concrete, the distance between described first interlayer 33 and described reactor body 1 is less than
5cm。
Further, described fine coal rapid pyrolysis apparatus also includes the second interlayer 34.Described second
Interlayer 34 is arranged in parallel with described first interlayer 33.Described second interlayer 34 and described shell
Body 31 inner wall limit goes out space, and described second interlayer 34 surface has loose structure.
The loose structure on described second interlayer 34 surface, the pyrolysis gas helped to create passes through second
Interlayer 34 enters into pyrolysis gas outlet 4.Meanwhile, described second interlayer 34 has filtration,
Can effectively remove dust present in pyrolysis gas, improve pyrolysis gas quality.
Concrete, the distance between described second interlayer 34 and described reactor body 1 is less than
5cm。
As it is shown in figure 1, described pulverized-coal fired boiler 200 is by described semicoke outlet 7 and described Rapid Thermal
Solve reactor 100 to communicate.
Described pulverized-coal fired boiler 200 remains the combustion system of original pulverized-coal fired boiler.By by described half
Burnt 5 are passed through in pulverized-coal fired boiler 200, it is achieved that pyrolysis char 5 and the coal in pulverized-coal fired boiler 200
Mix burning, ensure the stability of coal powder boiler combustion, improve the utilization rate of pyrolysis char, reduce
Cost of electricity-generating.
Further, described pyrolysis of coal device and pulverized-coal fired boiler combined system also include pulverized coal preparation system
400.Described pulverized-coal fired boiler 200 is connected with described semicoke outlet 7 by pulverized coal preparation system 400.
Export at pulverized-coal fired boiler 200 and semicoke and between 7, pulverized coal preparation system 400 is set, can be by pyrolysis half
Burnt 5 pulverize with the feed coal generated electricity.The coal powder size prepared is about 200um.By granule
Deliver to coal powder fired boiler burner through First air, and combustion power generation occurs.Granule is formed after pulverizing
Semicoke and feed coal, burning is more abundant, improves the utilization rate of pyrolysis char, reduces and sends out
Electricity cost.
Further, described pulverized-coal fired boiler 200 also includes air intake.
It is internal that air enters into pulverized-coal fired boiler 200 by air intake, supports the pyrolysis after pulverizing half
Burnt and feed coal granule fully burns, and generates electricity.
As it is shown in figure 1, described pyrolysis oil gas processing system 300 by described pyrolysis gas outlet 4 with
Described fast pyrolysis reactor 100 communicates.
Further, described pyrolysis oil gas processing system 300 includes oil and gas separating system 301, heat
Cleaning system of venting one's spleen 302 and tar refining system 303.Wherein, described pyrolysis gas outlet 4 with
Described oil and gas separating system 301 is connected.The gas outlet of described oil and gas separating system 301 and institute
State pyrolysis gas cleaning system 302 to connect.The liquid outlet of described oil and gas separating system 301 is with described
Tar refining system 303 connects.
Concrete, described pyrolysis gas is after granular bed 3 dedusting, by pyrolysis gas outlet 4
Enter into oil and gas separating system 301.Pyrolysis gas is formed after the effect of oil and gas separating system 301
Portion gas and liquid.Gas i.e. pyrolysis gas, liquid i.e. tar.The pyrolysis gas produced enters into heat
Vent one's spleen cleaning system 302, obtain pure combustible gas by the operation such as desulfurization, deamination.The tar produced
Entering into tar refining system 303, hydrogenated refining can obtain high added value oil product.
Fig. 2 is the process chart of pyrolysis of coal device of the present invention and pulverized-coal fired boiler combined system.Such as figure
Shown in 2, the method processing coal with pulverized-coal fired boiler combined system with pyrolysis of coal device as above,
Comprise the following steps:
A, utilize described fast pyrolysis reactor that feed coal is carried out pyrolysis processing, obtain semicoke and
Pyrolysis gas.
Fine coal is put into reactor body 1 through material inlet 6 internal.Fine coal radiates at heat accumulating type
Under the effect of pipe 2, pyrolysis forms pyrolysis gas, and produces pyrolysis char 5.
B, described semicoke is sent to pulverized-coal fired boiler, makes described semicoke and the coal in described pulverized-coal fired boiler
Powder carries out mixed combustion, obtains heat smoke.
The pyrolysis char 5 of generation is delivered to pulverized-coal fired boiler 200 by semicoke outlet 7 internal, with it
In coal dust carry out being sufficiently mixed burning.Utilize pyrolysis char to carry out combustion power generation, improve pyrolysis
The utilization rate of semicoke, and reduce cost of electricity-generating.
C, described pyrolysis gas is sent to described pyrolysis oil gas by the described pyrolysis gas outlet of discharge zone
Processing system, thus described pyrolysis oil gas is processed, obtain combustible gas.
Pyrolysis gas pyrolysis produced delivers to pyrolysis oil gas processing system by pyrolysis gas outlet 4
300, pyrolysis gas is further processed.
Described semicoke 5 and feed coal take a step forward at entrance pulverized-coal fired boiler 200 and include step D.Institute
State step D to include:
Described semicoke and feed coal are put in pulverized coal preparation system and pulverizes, obtain fine particle
Semicoke and the mixed-powder of coal.
Pyrolysis char 5 and generating feed coal are put in pulverized coal preparation system 400 jointly and pulverizes
Process.The coal powder size obtained after treatment is about 200um.Pulverized-coal fired boiler is delivered to through First air
Burner, carries out combustion power generation.
Described pyrolysis gas is sent to described pyrolysis oil gas processing system 300 by described pyrolysis gas outlet 4
After farther include step E, described step E includes: described pyrolysis gas enter oil and gas separating system
301, obtain the gas after gas-liquid separation and liquid.Described liquid is at tar rectification systems 303
Tar is obtained after reason.Described gas obtains pyrolysis gas after pyrolysis gas cleaning system 302 processes.
The pyrolysis gas produced after pyrolysis is sent to oil and gas separating system by pyrolysis gas outlet 4
301.Pyrolysis gas is forming part gas and liquid after the effect of oil and gas separating system 301.Gas
Body i.e. pyrolysis gas, liquid i.e. tar.The pyrolysis gas produced enters into pyrolysis gas cleaning system 302,
Pure combustible gas is obtained by the operation such as desulfurization, deamination.The tar produced enters into tar refining system
303, hydrogenated refining can obtain high added value oil product.
Application examples
Pyrolysis of coal device as shown in Figure 1 should be utilized powder with pulverized-coal fired boiler combined system by use-case
Coal is pyrolyzed, and obtains combustible gas.To treat that pyrolysis feed brown coal are crushed to below particle diameter 3mm.
Its brown coal analytical data is shown in Table 1.Thermal decomposition product data are as shown in Figure 2.
Table 1: Indonesia's brown coal analytical data.
Table 2: thermal decomposition product data.
| Project | Pyrolysis gas | Pyrolytic tar | Semicoke |
| Productivity % | 15.42 | 9.68 | 63.39 |
Compared with the situation of generating feed coal all with the fuel of pulverized-coal fired boiler, arrange from pyrolysis reactor
When the pyrolysis char gone out accounts for the 50% of pulverized-coal fired boiler fuel gross weight, whole system energy utilization efficiency
Improve 3.7%, the income of purified gas and coal tar is converted in cost of electricity-generating, cost of electricity-generating
Reducing about 5.87%, tar pretreated cost reduces by 6.2%.
Each technical characteristic of above-mentioned disclosure is not limited to disclosed and other features combinations, ability
Field technique personnel also can carry out other combinations between each technical characteristic according to goal of the invention, to realize
The purpose of the present invention is as the criterion.
Claims (10)
1. pyrolysis of coal device and pulverized-coal fired boiler combined system, it is characterised in that including: fast pyrogenation
Reactor, pulverized-coal fired boiler and pyrolysis oil gas processing system,
Described fast pyrolysis reactor includes that reactor body, described reactor body limit reaction
Space, described reaction compartment is divided into feed zone, pyrolysis zone and discharge zone from top to bottom；
Described pyrolysis zone is provided with multilamellar heat accumulation type radiant tube, and described multilamellar heat accumulation type radiant tube is described
In pyrolysis zone spaced apart along described reactor body short transverse, and every layer of described heat accumulating type spoke
Penetrate pipe and include the heat accumulation type radiant tube of multiple horizontally spaced distribution；
Described discharge zone is provided with semicoke outlet, granular bed and pyrolysis gas outlet；Described semicoke
Outlet is positioned at the bottom of described reactor body, and the semicoke after pyrolysis is discharged described reactor body；
Described granular bed includes housing and push-pull valve, described housing and described reactor body inwall
It is connected, thus limits the inner space of described granular bed, the top of described housing and bottom
Opening, described push-pull valve is positioned at the bottom of described housing, and the handwheel of described push-pull valve is by described reaction
Device body exterior passes inwall, thus makes the plate bottom as described housing of described push-pull valve；
Described pyrolysis gas outlet is positioned on the sidewall of the described reactor body corresponding to described housing；
Described pulverized-coal fired boiler is communicated with described fast pyrolysis reactor by the outlet of described semicoke；
Described pyrolysis oil gas processing system is by described pyrolysis gas outlet and described fast pyrolysis reactor
Communicate.
Pyrolysis of coal device the most according to claim 1 and pulverized-coal fired boiler combined system, its feature
Being, described pyrolysis oil gas processing system farther includes oil and gas separating system, pyrolysis gas purifies system
System and tar refining system, wherein, described pyrolysis gas outlet is connected with described oil and gas separating system
Connecing, the gas outlet of described oil and gas separating system is connected with described pyrolysis gas cleaning system, described oil
The liquid outlet of gas separating system is connected with described tar refining system.
Pyrolysis of coal device the most according to claim 1 and pulverized-coal fired boiler combined system, its feature
Being, farther include pulverized coal preparation system, described pulverized-coal fired boiler is by described pulverized coal preparation system and described half
Burnt outlet is connected.
Pyrolysis of coal device the most according to claim 1 and pulverized-coal fired boiler combined system, its feature
Being, every layer of described heat accumulation type radiant tube includes that multiple parallel and equally distributed heat accumulating type radiates
Pipe, and each described heat accumulation type radiant tube and each in adjacent upper and lower two-layer heat accumulation type radiant tube
Heat accumulation type radiant tube is parallel and staggers along the body height direction of described pyrolysis of coal reactor point
Cloth.
Pyrolysis of coal device the most according to claim 1 and pulverized-coal fired boiler combined system, its feature
Being, described granular bed farther includes the first interlayer, and described first interlayer is positioned at described shell
Internal portion, goes out space with described reactor body inner wall limit, and described first interlayer surface has many
Pore structure.
Pyrolysis of coal device the most according to claim 5 and pulverized-coal fired boiler combined system, its feature
Being, the distance between described first interlayer and described reactor body is less than 5cm.
Pyrolysis of coal device the most according to claim 1 and pulverized-coal fired boiler combined system, its feature
Being, described granular bed farther includes the second interlayer, described second interlayer and described first
Interlayer is arranged in parallel, and described second interlayer and described inner walls limit space, and described the
Two interlayer surfaces have loose structure.
8. process with pulverized-coal fired boiler combined system with pyrolysis of coal device described in any one of claim 1-7
The method of coal, comprises the following steps:
A, utilize described fast pyrolysis reactor that feed coal is carried out pyrolysis processing, obtain semicoke and
Pyrolysis gas；
B, described semicoke is sent to pulverized-coal fired boiler, makes described semicoke and the coal in described pulverized-coal fired boiler
Powder carries out mixed combustion, obtains heat smoke；
C, described pyrolysis gas is sent to described pyrolysis by the described pyrolysis gas outlet of described discharge zone
Oil vapor treatment system, thus described pyrolysis oil gas is processed, obtain combustible gas.
Method the most according to claim 8, described semicoke and feed coal are entering pulverized-coal fired boiler
Taking a step forward and include step D, described step D includes:
Described semicoke and feed coal are put in pulverized coal preparation system and pulverizes, obtain fine particle
Semicoke and the mixed-powder of coal.
Method the most according to claim 8, described pyrolysis gas passes through described pyrolysis gas outlet
Farther including step E after being sent to described pyrolysis oil gas processing system, described step E includes: institute
State pyrolysis gas and enter oil and gas separating system, obtain the gas after gas-liquid separation and liquid, described liquid
Obtaining tar after tar rectification systems processes, described gas obtains after pyrolysis gas cleaning system processes
To pyrolysis gas.
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