CN106500496A - A kind of system and method for utilization high-temperature semi-coke - Google Patents
A kind of system and method for utilization high-temperature semi-coke Download PDFInfo
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- CN106500496A CN106500496A CN201611101277.9A CN201611101277A CN106500496A CN 106500496 A CN106500496 A CN 106500496A CN 201611101277 A CN201611101277 A CN 201611101277A CN 106500496 A CN106500496 A CN 106500496A
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
- F26B21/145—Condensing the vapour onto the surface of the materials to be dried
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention discloses a kind of system and method for utilization high-temperature semi-coke.The system includes drying machine, elevator, pyrolysis oven, high-temperature semi-coke storehouse, lime set tank, water pump and heat exchanger；Wherein, the drying machine includes that coal entrance, the drying machine, the elevator, the pyrolysis oven and high-temperature semi-coke storehouse order are connected；The drying machine also includes high-temperature steam entrance, water and Low Temperature Steam mixture outlet；The heat exchanger is arranged in the high-temperature semi-coke storehouse, and the heat exchanger includes high-temperature steam outlet, condenses water inlet；The high-temperature steam outlet is connected with the high-temperature steam entrance；The lime set tank and the water pump is disposed between the water and Low Temperature Steam mixture outlet and the condensation water inlet.The present invention takes full advantage of the exterior heat of high-temperature semi-coke, cancels cold burnt machine and simplifies technological process, produces steam using high warm semicoke and goes drying raw coal (brown coal) to reduce Boiler Steam consumption.
Description
Technical field
A kind of the invention belongs to pyrolysis of coal and coal dust firing technical field of power generation, more particularly to heat accumulation type radiant tube heating
Particulate coal is producing coal tar combined generating system and method.
Background technology
Rich coal resources in China, in addition to part is for coking, conversion processing, the overwhelming majority is for directly combustion for raw coal
Burn.Coal directly burns, and causes the petroleum resources being rich in coal also not obtain sufficiently refining utilization, and the directly combustion heat
Efficiency is low, serious to environmental disruption.The pyrolysis of coal is to heat coal under an inert atmosphere, produces the product such as semicoke, coal gas and tar
Product, these products for obtaining can improve coal especially with cascade utilization, while fully extraction to petroleum resources again again
Brown coal and the comprehensive utilization ratio of jet coal, below explanation by taking brown coal as an example.
The drying of brown coal and pyrolysis are the important means of brown coal effectively utilizes, and the drying of brown coal needs to consume substantial amounts of steaming
Vapour, while the high-temperature semi-coke after brown coal pyrolysis is transported to medium-speed pulverizer after needing again to be cooled to room temperature again grind, during cold Jiao again
Want a large amount of cooling waters of consumption, high-temperature semi-coke correlation exterior heat not make full use of.In grinding machine grinding process, if with addition of original
Coal, needs post bake to dry, it is also desirable to consume partial heat again.
Power plant's semicoke powder blowing process (see accompanying drawing 1) as disclosed in prior art, the technological process of the technique is：From brown
Coal bunker raw coal out after the drying of drying machine 2 is lifted through elevator 3 and arrives pyrolysis oven 4, and brown coal become heat after pyrolysis
Semicoke, 750 DEG C or so of temperature, is cooled to 80 DEG C or so subsequently into cold burnt machine, then enters half coke bin 7, raw coal through elevator 6
Run coal bin 9 is entered, cold burnt and raw coal enters medium-speed pulverizer, medium-speed pulverizer by burnt machine 8 and feeder 10 according to a certain percentage respectively
The high temperature air 12 of interior utilization boiler heat-exchanger is further dried to raw coal, while raw coal and semicoke grinds by drying wind
Send into pulverized-coal fired boiler 13 to burn, steam major part is produced by boiler and is sent to steam turbine power generation, some steam returns dry
Dry machine 2 is used for drying raw coal.Prior art has a disadvantage that：(1) raw coal (brown coal) drying needs to consume the steaming that boiler 13 is produced
Vapour, reduces system production efficiency；(2) cold burnt machine needs to expend substantial amounts of cooling water, improves system cost；(3) high temperature half
Burnt exterior heat is not obtained by；(4) in medium-speed pulverizer, raw coal drying needs high temperature air, need to consume boiler heat-exchanger heat energy
Heat energy.
Content of the invention
In order to solve the above problems, a kind of new technique of present invention exploitation, before and after mainly solving brown coal pyrolysis, the energy has
The problem that effect is utilized, i.e., using the high temperature exterior heat of semicoke after pyrolysis, as the thermal source that raw coal before pyrolysis is dried, while also as mill
The thermal source that raw coal is dried in coal machine, to realize the exterior heat for making full use of high-temperature semi-coke, cancels cold burnt machine with simplification of flowsheet, profit
Steam is produced with high warm semicoke to go to dry purpose of the raw coal (brown coal) to reduce Boiler Steam consumption.
For achieving the above object, the present invention propose a kind of system of utilization high-temperature semi-coke, including drying machine, elevator,
Pyrolysis oven, high-temperature semi-coke storehouse, lime set tank, water pump and heat exchanger；Wherein,
The drying machine includes coal entrance, the drying machine, the elevator, the pyrolysis oven and the high temperature half
Coke bin order is connected；
The drying machine is dried to coal using high-temperature steam, is obtained dried coal, water and Low Temperature Steam and is mixed
Compound；The elevator is used for for the dried coal delivering to the pyrolysis oven；The pyrolysis oven is used for from described
The coal of elevator is pyrolyzed, the high-temperature semi-coke after being pyrolyzed；
The drying machine also includes high-temperature steam entrance, water and Low Temperature Steam mixture outlet；The heat exchanger is arranged on
In the high-temperature semi-coke storehouse, the heat exchanger includes high-temperature steam outlet, condenses water inlet；The high-temperature steam outlet and described
High-temperature steam entrance is connected；It is disposed between the water and Low Temperature Steam mixture outlet and the condensation water inlet described
Lime set tank and the water pump；
The lime set tank is used for the gas-liquid separation of the water and Low Temperature Steam mixture, obtains condensate；The water pump is used
In by the condensate through condense water inlet transport to the heat exchanger；The heat exchanger be used for the pyrolysis after high-temperature semi-coke and
The heat exchange of the condensate, the high-temperature semi-coke and the high-temperature steam after being exchanged heat.
Further, the system also includes：Coke transporting machine, run coal bin, feeder and coal pulverizer.
The coke transporting machine is arranged between the coal pulverizer and the high-temperature semi-coke storehouse, for by the high temperature after the heat exchange
Semicoke sends into the coal pulverizer.
The feeder is arranged between the coal pulverizer and the run coal bin, for raw coal is sent into the coal pulverizer.
The coal pulverizer is used for the high-temperature semi-coke after the heat exchange and the raw coal drying and grinding, and obtains coal dust and Jiao
Powder.
Further, the system also includes coal bunker, and the coal bunker includes export of coal, the export of coal and the coal
Charcoal entrance is connected, and the coal bunker is additionally provided with coal speed actuator, and the coal speed actuator is used for adjusting coal feedstock speed.
Further, the system also includes pulverized-coal fired boiler, and the pulverized-coal fired boiler includes coal dust and coke powder entrance, the mill
Coal machine also includes that coal dust and coke powder outlet, the coal dust are connected with the coal dust and coke powder entrance with coke powder outlet, the coal dust
Boiler is used for the burning of the coal dust and coke powder.
Further, the coal pulverizer also includes air intake, is passed through normal temperature air by the air intake, the coal
The coal powder boiler combustion sent into by powder and coke powder, or, high temperature air is passed through by the air intake, the raw coal is done
Dry.
The present invention also provides the method using high-temperature semi-coke, it is characterised in that including step：
A. the drying machine coal is dried using the high-temperature steam obtain the dried coal,
The water and Low Temperature Steam mixture, the dried coal is delivered to the pyrolysis oven using elevator then carries out heat
Solution；
B. the water and Low Temperature Steam mixture are transported to the lime set tank and carries out gas-liquid separation and obtain the condensate, so
The condensate is transported to the heat exchanger using the water pump afterwards, the high-temperature semi-coke after the heat exchanger and the pyrolysis
Heat exchange, after heat exchange, the condensate is heated to be become the high-temperature steam and transports to the drying machine.
Further, methods described also includes, by the high-temperature semi-coke after the heat exchange and the raw coal respectively by described
Coke transporting machine and the feeder feed the coal pulverizer, the coal pulverizer be dried with after pulverizing, obtain the coal dust and
The coal dust and coke powder are transported to the coal powder boiler combustion and produce steam, the steam is sent to steam turbine power generation by coke powder.
Specifically, the drying meanss of the coal pulverizer are：
The part that the coal powder boiler combustion is produced steam, transports to the coal pulverizer and raw coal is dried, or,
High-temperature semi-coke after adjusting the pyrolysis enters the speed in the high-temperature semi-coke storehouse and the stream of the water pump
Amount, to control the temperature of the high-temperature semi-coke after the heat exchange, is carried out to raw coal using the waste heat of the high-temperature semi-coke after the heat exchange
Dry.
As preferred embodiment, by controlling the flow of the water pump, the temperature control of the high-temperature steam is existed
150-250℃.
Specifically, the ratio for feeding the high-temperature semi-coke after the heat exchange of the coal pulverizer and the raw coal is controlled to 1:
0.5-2.
As preferred embodiment, by the temperature control of the high-temperature semi-coke after the heat exchange at 250 DEG C -350 DEG C.
Using the system and method for the present invention, following effect is achieved：
(1) exterior heat of high-temperature semi-coke is taken full advantage of, energy waste is reduced；
(2) technique more simplifies, and eliminates cold burnt machine；
(3) the steam drying brown coal produced using high-temperature semi-coke, are eliminated original to boiler under the premise that security is guaranteed
The consumption of steam, improves boiler efficiency；
(4) high temperature air is instead of as to coal wind by the use of normal temperature air, further reduce energy resource consumption.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
Fig. 1 is power plant's semicoke powder blowing process process chart of the present invention；
In Fig. 1,1- brown coal storehouse；2- drying machines；3- elevators；4- pyrolysis ovens；The cold burnt machines of 5-；6th, elevator；The cold coke bins of 7-；
8- coke transporting machines；9- run coal bins；10- feeders；11- coal pulverizers；12- high temperature airs；13- pulverized-coal fired boilers；
Fig. 2 is the high-temperature semi-coke comprehensive utilization novel flour milling technology flow chart of the present invention；
In Fig. 2,1- brown coal storehouse；2- drying machines；3- elevators；4- jet chimneys；5- steam condensate tanks；6- water pumps；7- is changed
Hot device；8- pyrolysis ovens；9- high-temperature semi-cokes storehouse；10- coke transporting machines；11st, run coal bin；12- feeders；13- normal temperature airs；14- coal-grindings
Machine；15- pulverized-coal fired boilers.
Specific embodiment
Below in conjunction with accompanying drawing 2 and embodiment, the specific embodiment of the present invention is described in more details, so as to energy
The advantage of the solution of the present invention and its various aspects is enough more fully understood.However, specific embodiments described below and enforcement
Example is only descriptive purpose, rather than limitation of the present invention.
High-temperature semi-coke of the present invention grinds new technology to be included：
Drying machine is by steam to brown coal contact drying, heat exchanger of the steam in high-temperature semi-coke storehouse, the logical high temperature half of water
Heat exchanger 7 in coke bin 9 becomes high-temperature steam, enters drying machine by pipeline 4 and raw coal is dried；
Rear steam coagulation Cheng Shui and part Low Temperature Steam has been dried, the 5 further gas-liquid separation of lime set tank, condensate has been entered
Heat exchanger 7 is entered by water pump 6 and is heated to form vapor, drying machine drying brown coal is entered by jet chimney 4 again then；
The vapor that heat exchanger is produced enters drying machine 2, steam indirect heat exchange in the drying machine and brown coal by pipeline 4
Afterwards, brown coal are warmed drying, while vapor major part condenses into water enters lime set tank, are then entering half coke bin by water pump
Interior heat exchanger is heated into vapor；
High-temperature semi-coke after the cooling of heat exchanger 7 after raw coal in high-temperature semi-coke and run coal bin 11 respectively by burnt machine 10
Coal pulverizer 14 is entered according to a certain percentage with feeder 12, by air, the coal dust after drying and grinding and coke powder pot is sent into
Stove burns, and produces steam drive steam turbine power generation.
In detail, new technology idiographic flow of the present invention is as follows：
(1) pyrolysis oven 8 is entered by elevator 3 after the brown coal drying machine 2 from brown coal storehouse 1 out is dried.Drying machine
By steam to brown coal contact drying.
(2) heat exchanger of the steam in high-temperature semi-coke storehouse, the heat exchanger 7 in the logical high-temperature semi-coke storehouse 9 of water become high temperature steaming
Vapour, enters drying machine by pipeline 4 and brown coal is dried, dried rear steam coagulation Cheng Shui and part Low Temperature Steam.
(3) condensate and some vapor enter the 5 further gas-liquid separation of lime set tank, and condensate enters heat exchange by water pump 6
Device 7 is heated to form vapor, then enters drying machine drying brown coal by jet chimney 4 again.
(4) high-temperature semi-coke original temperature is 650-850 DEG C or so, water is heated by the heat exchanger in high-temperature semi-coke storehouse 9
Into vapor, the temperature of vapor is exported by controlling the flow-control of water pump 6,150-250 is arrived in general steam temperature control
DEG C, meet the condition of drying brown coal.
(5) vapor enters drying machine 2 by pipeline 4, and after indirect heat exchange in drying machine and brown coal, brown coal are risen steam
Temperature is dried, while vapor major part condenses into water enters lime set tank, is then entering the heat exchanger in half coke bin by water pump
It is heated into vapor.
(6) high-temperature semi-coke after the cooling of heat exchanger 7 by being reduced to 250 DEG C -350 DEG C, then high-temperature semi-coke and run coal bin
Raw coal in 11 enters coal pulverizer 14 according to a certain percentage by burnt machine 10 and feeder 12 respectively, while coal pulverizer is passed through often
Warm air 13, in coal pulverizer 14, high-temperature semi-coke simultaneously as heating agent and raw coal mixing after raw coal heating, drying, by normal
Warm air, sends the coal dust after drying and grinding and coke powder into boiler combustion, produces steam drive steam turbine power generation.
Below with reference to specific embodiment, present invention is described, it should be noted that embodiment is only descriptive
, and limit the present invention never in any form.
Embodiment 1
The present embodiment proposes a kind of system and method for utilization high-temperature semi-coke, and brown coal enter pyrolysis oven after drying,
Semicoke is generated, semicoke and thermal coal enter coal pulverizer according to a certain percentage and grind drying, after wearing into coal dust, enter pulverized-coal fired boiler combustion
Burn generation steam and remove steam turbine power generation.The technical data of brown coal such as table 1：
Table 1：The technical data of brown coal：
The lower coal amount of brown coal is designed as 120t/h, enters drying machine, the moisture Mt of brown coal after drying by batcher
≤ 10%, it is pyrolyzed subsequently into pyrolysis oven.
Semicoke is produced after brown coal pyrolysis, yield is 65t/h, 750 DEG C of semicoke outlet temperature, and semicoke parameter is as follows：
Table 2：High-temperature semi-coke parameter
The thermal capacitance of semicoke is 210J/ (kg K), and after heat exchanger, temperature drops to 300 DEG C or so by 750 DEG C, heat exchanger
0.6Mpa, 190 DEG C of 65～85t/h of vapor are produced, vapor is made a gift to someone drying machine drying brown coal by pipeline.By adjusting water pump
Flow-control vapor temperature.Thus meet by the steam that the vapor that brown coal drying needs is produced by heat exchanger,
Extra steam is not needed.Above steam substitutes the steam for coming that raw coal boiler is introduced through completely.
Raw coal in high-temperature semi-coke and run coal bin is according to 1：1 ratio enters coal pulverizer, and the raw coal parameter in run coal bin is such as
Under：
3 run coal bin raw coal coal basic data of table
High-temperature semi-coke reaches 300 DEG C after homoiothermic, and the raw coal of run coal bin is according to 1:1 ratio is entered by feeder
Coal pulverizer mixing grinds, and sets respective feeding coal and is 60t/h or so, adds up to 120t/h, while by blower fan to coal tympanites due to wind
Enter grinding machine, design air flow 250000Nm3/ h, semicoke and raw coal mixing are generated electricity by being blown into boiler combustion to coal wind after having ground.
After entering coal pulverizer, two kinds of materials mix with combustion air again, and after mixing, temperature is 180 DEG C or so, and ground is mixed
Closing powder, coal powder boiler combustion is entered under the drive of combustion air.
4 grinding machine of table exports mixed powder parameter
| Temperature | Granularity (- 200 mesh) | Volatile matters Vad | Yield (t/h) | Air capacity (Nm3/h) |
| 180℃ | >=75% | 10.5 | 120 | 250000 |
Embodiment 2
The present embodiment is as 1 system for use in carrying of above-described embodiment, but process conditions are different, as described below.The technology of brown coal
Data such as table 1：
Table 1：The technical data of brown coal：
The lower coal amount of brown coal is designed as 100t/h, enters drying machine, the moisture Mt of brown coal after drying by batcher
≤ 10%, it is pyrolyzed subsequently into pyrolysis oven.
Semicoke is produced after brown coal pyrolysis, yield is 60t/h, 650 DEG C of semicoke outlet temperature, and semicoke parameter is as follows：
Table 2：High-temperature semi-coke parameter
The thermal capacitance of semicoke is 210J/ (kg K), and after heat exchanger, temperature drops to 250 DEG C or so by 650 DEG C, heat exchanger
0.55Mpa, 215 DEG C of 65～85t/h of vapor are produced, vapor is made a gift to someone drying machine drying brown coal by pipeline.By adjusting water
The temperature of the flow-control vapor of pump.Thus full by the steam that the vapor that brown coal drying needs is produced by heat exchanger
Foot, it is not necessary to extra steam.Above steam substitutes the steam for coming that raw coal boiler is introduced through completely.
Raw coal in high-temperature semi-coke and run coal bin is according to 1：0.5 ratio enters coal pulverizer, the raw coal parameter in run coal bin
As follows：
3 run coal bin raw coal coal basic data of table
High-temperature semi-coke reaches 250 DEG C after homoiothermic, and the raw coal of run coal bin is according to 1:0.5 ratio is entered by feeder
Enter coal pulverizer mixing to grind, high-temperature semi-coke feeding coal is set as 60t/h or so, add up to 90t/h, while by blower fan to coal wind
Blast grinding machine, design air flow 250000Nm3/ h, semicoke and raw coal mixing are sent out by being blown into boiler combustion to coal wind after having ground
Electricity.
After entering coal pulverizer, two kinds of materials mix with combustion air again, and after mixing, temperature is 160 DEG C or so, and ground is mixed
Closing powder, coal powder boiler combustion is entered under the drive of combustion air.Grinding machine outlet mixed powder parameter is as follows：
4 grinding machine of table exports mixed powder parameter
| Temperature | Granularity (- 200 mesh) | Volatile matters Vad | Yield (t/h) | Air capacity (Nm3/h) |
| 160℃ | >=75% | 10.0 | 90 | 250000 |
Embodiment 3
The present embodiment is as 1 system for use in carrying of above-described embodiment, but process conditions are different, as described below.The technology of brown coal
Data such as table 1：
Table 1：The technical data of brown coal：
The lower coal amount of brown coal is designed as 120t/h, enters drying machine, the moisture Mt of brown coal after drying by batcher
≤ 10%, it is pyrolyzed subsequently into pyrolysis oven.
Semicoke is produced after brown coal pyrolysis, yield is 60t/h, 850 DEG C of semicoke outlet temperature, and semicoke parameter is as follows：
Table 2：High-temperature semi-coke parameter
The thermal capacitance of semicoke is 210J/ (kg K), and after heat exchanger, temperature drops to 350 DEG C or so by 850 DEG C, heat exchanger
0.65Mpa, 250 DEG C of 65～85t/h of vapor are produced, vapor is made a gift to someone drying machine drying brown coal by pipeline.By adjusting water
The temperature of the flow-control vapor of pump.Thus full by the steam that the vapor that brown coal drying needs is produced by heat exchanger
Foot, it is not necessary to extra steam.Above steam substitutes the steam for coming that raw coal boiler is introduced through completely.
Raw coal in high-temperature semi-coke and run coal bin is according to 1：2 ratio enters coal pulverizer, and the raw coal parameter in run coal bin is such as
Under：
3 run coal bin raw coal coal basic data of table
High-temperature semi-coke reaches 350 DEG C after homoiothermic, and the raw coal of run coal bin is according to 1:2 ratio is entered by feeder
Coal pulverizer mixing grinds, and sets high-temperature semi-coke feeding coal as 60t/h or so, adds up to 180t/h, while by blower fan to coal wind
Blast grinding machine, design air flow 250000Nm3/ h, semicoke and raw coal mixing are sent out by being blown into boiler combustion to coal wind after having ground
Electricity.
After entering coal pulverizer, two kinds of materials mix with combustion air again, and after mixing, temperature is 200 DEG C or so, and ground is mixed
Closing powder, coal powder boiler combustion is entered under the drive of combustion air.Grinding machine outlet mixed powder parameter is as follows：
4 grinding machine of table exports mixed powder parameter
| Temperature | Granularity (- 200 mesh) | Volatile matters Vad | Yield (t/h) | Air capacity (Nm3/h) |
| 200℃ | >=75% | 10.5 | 180 | 250000 |
Embodiment 4
The present embodiment is as 1 system for use in carrying of above-described embodiment, but process conditions are different, as described below.The technology of brown coal
Data such as table 1：
Table 1：The technical data of brown coal：
The lower coal amount of brown coal is designed as 110t/h, enters drying machine, the moisture Mt of brown coal after drying by batcher
≤ 10%, it is pyrolyzed subsequently into pyrolysis oven.
Semicoke is produced after brown coal pyrolysis, yield is 65t/h, 750 DEG C of semicoke outlet temperature, and semicoke parameter is as follows：
Table 2：High-temperature semi-coke parameter
The thermal capacitance of semicoke is 210J/ (kg K), and after heat exchanger, temperature drops to 300 DEG C or so by 750 DEG C, heat exchanger
0.55Mpa, 150 DEG C of 65～85t/h of vapor are produced, vapor is made a gift to someone drying machine drying brown coal by pipeline.By adjusting water
The temperature of the flow-control vapor of pump.Thus full by the steam that the vapor that brown coal drying needs is produced by heat exchanger
Foot, it is not necessary to extra steam.Above steam substitutes the steam for coming that raw coal boiler is introduced through completely.
Raw coal in high-temperature semi-coke and run coal bin is according to 1：1.2 ratio enters coal pulverizer, the raw coal parameter in run coal bin
As follows：
3 run coal bin raw coal coal basic data of table
High-temperature semi-coke reaches 300 DEG C after homoiothermic, and the raw coal of run coal bin is according to 1:1.2 ratio is entered by feeder
Enter coal pulverizer mixing to grind, high-temperature semi-coke feeding coal is set as 60t/h or so, add up to 132t/h, while by blower fan to coal
Tympanites due to wind enters grinding machine, design air flow 250000Nm3/ h, semicoke and raw coal mixing are sent out by being blown into boiler combustion to coal wind after having ground
Electricity.
After entering coal pulverizer, two kinds of materials mix with combustion air again, and after mixing, temperature is 180 DEG C or so, and ground is mixed
Closing powder, coal powder boiler combustion is entered under the drive of combustion air.Grinding machine outlet mixed powder parameter is as follows：
4 grinding machine of table exports mixed powder parameter
| Temperature | Granularity (- 200 mesh) | Volatile matters Vad | Yield (t/h) | Air capacity (Nm3/h) |
| 180℃ | >=75% | 10.2 | 132 | 250000 |
Claims (10)
1. a kind of system of utilization high-temperature semi-coke, including drying machine, elevator, pyrolysis oven, high-temperature semi-coke storehouse, lime set tank, water pump
And heat exchanger；Wherein,
The drying machine includes coal entrance, the drying machine, the elevator, the pyrolysis oven and the high-temperature semi-coke storehouse
Order is connected；
The drying machine also includes high-temperature steam entrance, water and Low Temperature Steam mixture outlet；The heat exchanger is arranged on described
In high-temperature semi-coke storehouse, the heat exchanger includes high-temperature steam outlet, condenses water inlet；The high-temperature steam outlet and the high temperature
Steam inlet is connected；The lime set is disposed between the water and Low Temperature Steam mixture outlet and the condensation water inlet
Tank and the water pump.
2. system according to claim 1, it is characterised in that the system also includes：Coke transporting machine, run coal bin, feeder
And coal pulverizer；Wherein,
The coke transporting machine is arranged between the coal pulverizer and the high-temperature semi-coke storehouse；
The feeder is arranged between the coal pulverizer and the run coal bin.
3. system according to claim 2, it is characterised in that
The system also includes coal bunker, and the coal bunker includes export of coal, and the export of coal is connected with the coal entrance, institute
State coal bunker and be additionally provided with coal speed actuator.
4. system according to claim 2, it is characterised in that
The system also includes pulverized-coal fired boiler, and the pulverized-coal fired boiler includes that coal dust and coke powder entrance, the coal pulverizer also include coal
Powder and coke powder outlet, the coal dust are connected with the coal dust and coke powder entrance with coke powder outlet.
5. system according to claim 2, it is characterised in that the coal pulverizer also includes air intake.
6. the method that system described in a kind of use claim 1 processes high-temperature semi-coke, it is characterised in that including step：
A. the coal is dried using the high-temperature steam in the drying machine and obtains the dried coal, described
Then the dried coal delivered to the pyrolysis oven using elevator and be pyrolyzed by water and Low Temperature Steam mixture；
B. the water and Low Temperature Steam mixture are transported to the lime set tank and carries out gas-liquid separation and obtain the condensate, Ran Houli
The condensate is transported to the heat exchanger with the water pump, the heat friendship of the high-temperature semi-coke after the heat exchanger and the pyrolysis
Change, after heat exchange, the condensate is heated to be become the high-temperature steam and transport to the drying machine.
7. method according to claim 6, it is characterised in that methods described also includes：
High-temperature semi-coke after the heat exchange and raw coal are fed the coal pulverizer by the coke transporting machine and the feeder respectively,
It is dried in the coal pulverizer and after pulverizing, obtains the coal dust and coke powder, the coal dust and coke powder is transported to the coal dust
Boiler combustion produces steam, and the steam is sent to steam turbine power generation.
8. method according to claim 7, it is characterised in that the drying meanss of the coal pulverizer are：
The part that the coal powder boiler combustion is produced steam, transports to the coal pulverizer and raw coal is dried, or,
High-temperature semi-coke after adjusting the pyrolysis enters the speed in the high-temperature semi-coke storehouse and the flow of the water pump, with
The temperature of the high-temperature semi-coke after the heat exchange is controlled, raw coal is dried using the waste heat of the high-temperature semi-coke after the heat exchange.
9. method according to claim 8, it is characterised in that
By controlling the flow of the water pump, by the temperature control of the high-temperature steam at 150-250 DEG C；
The ratio for feeding the high-temperature semi-coke after the heat exchange of the coal pulverizer and the raw coal is controlled to 1:0.5-2.
10. method according to claim 8, it is characterised in that the temperature control of the high-temperature semi-coke after the heat exchange exists
250℃-350℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107965747A (en) * | 2017-12-12 | 2018-04-27 | 北京神雾电力科技有限公司 | A kind of pre- heat utilization system of semicoke and technique |
| CN107974262A (en) * | 2017-11-24 | 2018-05-01 | 北京神雾电力科技有限公司 | A kind of superfine powder fast pyrogenation reaction system and method |
| CN108151008A (en) * | 2017-11-18 | 2018-06-12 | 西安交通大学 | A kind of power boiler low NOx of high-temperature flue gas preheating semicoke mixes combustion system and method |
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2016
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151008A (en) * | 2017-11-18 | 2018-06-12 | 西安交通大学 | A kind of power boiler low NOx of high-temperature flue gas preheating semicoke mixes combustion system and method |
| CN108151008B (en) * | 2017-11-18 | 2019-03-12 | 西安交通大学 | A kind of mixed combustion system and method for power boiler low NOx of high-temperature flue gas preheating semicoke |
| CN107974262A (en) * | 2017-11-24 | 2018-05-01 | 北京神雾电力科技有限公司 | A kind of superfine powder fast pyrogenation reaction system and method |
| CN107965747A (en) * | 2017-12-12 | 2018-04-27 | 北京神雾电力科技有限公司 | A kind of pre- heat utilization system of semicoke and technique |
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