CN105419832A - Coal pyrolysis reactor-circulating fluidized bed boiler combination system and applications thereof - Google Patents
Coal pyrolysis reactor-circulating fluidized bed boiler combination system and applications thereof Download PDFInfo
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- CN105419832A CN105419832A CN201511023526.2A CN201511023526A CN105419832A CN 105419832 A CN105419832 A CN 105419832A CN 201511023526 A CN201511023526 A CN 201511023526A CN 105419832 A CN105419832 A CN 105419832A
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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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- 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
- C10B49/00—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
- C10B49/02—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge
- C10B49/04—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge while moving the solid material to be treated
- C10B49/08—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge while moving the solid material to be treated in dispersed form
- C10B49/10—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge while moving the solid material to be treated in dispersed form according to the "fluidised bed" technique
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- 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
- C10K1/34—Purifying combustible gases containing carbon monoxide by catalytic conversion of impurities to more readily removable materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/22—Fuel feeders specially adapted for fluidised bed combustion apparatus
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Abstract
The invention discloses a coal pyrolysis reactor-circulating fluidized bed boiler combination system and applications thereof. The system comprises a coal pyrolysis reactor, which comprises a semi-coke outlet and a pyrolysis gas outlet; a multi-layer regenerative radiant tube is arranged in the coal pyrolysis reactor; the circulating fluidized bed boiler is provided with a semi-coke inlet and a flue gas outlet, and the semi-coke inlet is connected to the semi-coke outlet. In the front section of coal topping, the pyrolysis technology is complicated, the coupling between the pyrolysis technology and circulating fluidizing bed is high, and thus the operation is unstable. The provided system solves the problem mentioned above and is capable of guaranteeing the stability of generating system when the coal pyrolysis reactor-circulating fluidized bed boiler combination system is used to generate electricity.
Description
Technical field
The invention belongs to technical field of coal chemical industry, specifically, the present invention relates to a kind of pyrolysis of coal reactor-circular fluid bed combined system and application thereof.
Background technology
The semicoke produced after pyrolysis of coal can as fuel for generating.In the prior art, pyrolysis of coal plug technique is mainly for circulating fluidized bed generating set.What existing pyrolysis of coal power generation system adopted mostly is circular fluid bed, and such system, owing to taking more complicated solid thermal carriers technique, exists many defects.Such as, existing circulating fluidized bed generating set requires that circular fluid bed and pyrolysis of coal reactor run well simultaneously, if a method, system changes, capital causes whole technique cannot steady running, this does not meet the requirement of China to power generation stabilization, and the oil gas produced in pyrolysis of coal reactor needs the chemical systems such as supporting petroleum vapor recovery utilization, equipment investment cost is caused to become large.
Therefore, existing circulating fluidized bed generating set is further improved.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is to propose a kind of pyrolysis of coal reactor-circular fluid bed combined system and application thereof, it is complicated that this combined system can solve coal plug leading portion pyrolytic process, and the problem that cause fluctuation of service high with circulating fluidized bed coupling, the stability of power generation system can be guaranteed when utilizing this pyrolysis of coal reactor-circular fluid bed combined system to generate electricity simultaneously.
In one aspect of the invention, the present invention proposes a kind of pyrolysis of coal reactor-circular fluid bed combined system.According to embodiment of the present invention, this combined system comprises:
Pyrolysis of coal reactor, described pyrolysis of coal reactor has semicoke outlet and pyrolysis gas outlet, and described pyrolysis of coal inside reactor is provided with multilayer heat accumulation type radiant tube;
Circular fluid bed, described circular fluid bed has semicoke entrance and exhanst gas outlet, and described semicoke entrance exports with described semicoke and is connected.
The present inventor is surprised to find, pyrolysis of coal reactor of the present invention can coupling direct with existing circular fluid bed, and without the need to transforming existing circular fluid bed, particularly, in pyrolysis of coal reactor-circular fluid bed combined system of the present invention, compared with the system of existing pyrolysis of coal plug technique-circulating fluidized bed generating set coupling, pyrolysis of coal reactor and circular fluid bed can run relatively independently, and the two interferes with each other relatively little.When pyrolysis of coal reactor-circular fluid bed combined system of the present invention is for generating electricity, the stability of power generation system can be guaranteed.
In one embodiment of the invention, described pyrolysis of coal reactor-circular fluid bed combined system comprises further: spray equipment, and described spray equipment has pyrolysis gas entrance, and described pyrolysis gas entrance is connected with described pyrolysis gas outlet.
In one embodiment of the invention, described spray equipment has coal tar outlet, described circular fluid bed has tar burner, and described coal tar outlet is connected with described tar burner.By the system of the present embodiment, the coal tar produced in pyrolysis of coal reactor-circular fluid bed combined system of the present invention can be used as igniting and the peak regulation oil of the oil fuel burner of circular fluid bed.
In one embodiment of the invention, every layer of described heat accumulation type radiant tube comprises multiple parallel and equally distributed heat accumulation type radiant tube, and each described heat accumulation type radiant tube is parallel with each heat accumulation type radiant tube in adjacent upper and lower two-layer heat accumulation type radiant tube and be in staggered distribution along on the body height direction of described pyrolysis of coal reactor.Thus, the fast pyrogenation efficiency of coal charge can be significantly improved, and then improve the productive rate of coal tar.
In one embodiment of the invention, described spray equipment has combustible gas outlet, and described combustible gas outlet is connected with described heat accumulation type radiant tube.By the system of the present embodiment, the combustible gas produced in pyrolysis of coal reactor-circular fluid bed combined system of the present invention can be utilized by this system self, realizes self-heating.
In one embodiment of the invention, described pyrolysis of coal reactor-circular fluid bed combined system comprises further: U-shaped valve, described U-shaped valve is arranged on the bottom of described pyrolysis of coal reactor, and described U-shaped valve connects the semicoke outlet of described pyrolysis of coal reactor and the semicoke entrance of described circular fluid bed.U-shaped valve like this can be sent by wind and described semicoke is supplied to described circular fluid bed, thus the failure rate of remarkable reduction system and energy consumption.Wind send can by being blown into rare gas element to realize, such as nitrogen etc.
In second of the present invention, pyrolysis of coal reactor-circular fluid bed combined system of the present invention may be used for generating.When combined system of the present invention is for generating electricity, the heat-exchange system in the flue gas produced by circular fluid bed in combined system of the present invention and circular fluid bed being carried out heat exchange, producing water vapor, utilizing the water vapor of generation to generate electricity thus.Utilize combined system of the present invention to generate electricity, the comprehensive utilization of the energy can be realized, and ensure that power generation system has higher stability.
In 3rd of the present invention, the present invention proposes a kind of method processing coal.According to embodiment of the present invention, the method utilizes aforementioned pyrolysis of coal reactor-circular fluid bed combined system to carry out.According to embodiment of the present invention, the method comprises:
(1) coal is delivered to described pyrolysis of coal reactor and carries out pyrolysis processing, to obtain semicoke and pyrolysis gas;
(2) described semicoke is delivered in described circular fluid bed, makes described semicoke and coal carry out mixed firing, to obtain flue gas.
Thus, the present inventor is surprised to find, pyrolysis of coal reactor of the present invention can coupling direct with existing circular fluid bed, and without the need to transforming existing circular fluid bed, particularly, in pyrolysis of coal reactor-circular fluid bed combined system of the present invention, compared with the system of existing pyrolysis of coal plug technique-circulating fluidized bed generating set coupling, pyrolysis of coal reactor and circular fluid bed can run relatively independently, and the two interferes with each other relatively little.When pyrolysis of coal reactor-circular fluid bed combined system of the present invention is for generating electricity, the stability of power generation system can be guaranteed.
In one embodiment of the invention, the method for described process coal comprises further: described pyrolysis gas is delivered to described spray equipment and carries out cooling process, thus obtain combustible gas and coal tar.
In one embodiment of the invention, the method of described process coal comprises further: a part for described coal tar is supplied to the oil fuel burner of described circular fluid bed as fuel, preferably the heavy oil in described coal tar is separated and the oil fuel burner being supplied to described circular fluid bed as fuel.By the method for the present embodiment, the coal tar produced in pyrolysis of coal reactor-circular fluid bed combined system of the present invention can be used as igniting and the peak regulation oil of the oil fuel burner of circular fluid bed.
In one embodiment of the invention, the method for described process coal comprises further: a part for described combustible gas is supplied to described heat accumulation type radiant tube and uses as fuel.By the method for the present embodiment, the combustible gas produced in pyrolysis of coal reactor-circular fluid bed combined system of the present invention can be utilized by this system self, realizes self-heating.
In one embodiment of the invention, in step (2), by described U-shaped valve, described semicoke is supplied to described circular fluid bed.Thus, failure rate and the energy consumption of system can significantly be reduced.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structural representation of the reactor of pyrolysis of coal according to an embodiment of the invention-circular fluid bed combined system;
Fig. 2 is the structural representation of the pyrolysis of coal reactor-circular fluid bed combined system according to another embodiment of the present invention;
Fig. 3 is the structural representation of the pyrolysis of coal reactor-circular fluid bed combined system according to another embodiment of the present invention;
Fig. 4 is the structural representation of the pyrolysis of coal reactor-circular fluid bed combined system according to another embodiment of the present invention;
Fig. 5 is the method flow schematic diagram processing coal according to an embodiment of the invention;
Fig. 6 is the method flow schematic diagram of the process coal according to another embodiment of the present invention;
Fig. 7 is the method flow schematic diagram of the process coal according to another embodiment of the present invention;
Fig. 8 utilizes pyrolysis of coal reactor-circular fluid bed combined system to carry out the system architecture schematic diagram generated electricity according to an embodiment of the invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In one aspect of the invention, the present invention proposes a kind of pyrolysis of coal reactor-circular fluid bed combined system.According to embodiments of the invention, this pyrolysis of coal reactor-circular fluid bed combined system comprises: pyrolysis of coal reactor, described pyrolysis of coal reactor has semicoke outlet and pyrolysis gas outlet, and described pyrolysis of coal inside reactor is provided with multilayer heat accumulation type radiant tube; Circular fluid bed, described circular fluid bed has tar burner, semicoke entrance and exhanst gas outlet, and described semicoke entrance exports with described semicoke and is connected.
Contriver finds, the pyrolysis of coal reactor of multilayer heat accumulation type radiant tube is set by adopting inside and existing circular fluid bed directly carries out coupling, and without the need to transforming existing circular fluid bed, the hot semicoke produced in pyrolysis of coal reactor can be delivered to circular fluid bed and carry out burning generation heat smoke, thermal source is provided for pyrolytic process owing to adopting heat accumulation type radiant tube in pyrolysis of coal reactor, the flow that can pass into the combustion gas of heat accumulation type radiant tube by adjustment realizes the accurate temperature controlling to pyrolytic process, and this heat accumulation type radiant tube can by realizing commutation and heat storage type combustion fast at two ends, the homogeneity in temperature field in pyrolysis of coal reactor can be ensured, thus the fast pyrogenation efficiency of coal charge can be significantly improved, more traditional use gaseous heat-carrier or solid thermal carriers are compared as the pyrolytic reaction device of pyrolysis thermal source simultaneously, pyrolysis of coal reaction unit of the present invention does not need to arrange preheating unit and carrier separating unit, greatly can simplify fast pyrogenation reaction process flow process, thus significantly reduce device failure rate and in gained tar dust content lower, and then it is complicated to solve existing coal plug leading portion pyrolytic process, and the problem of existing pyrolysis reactor and the high fluctuation of service caused of circular fluid bed coupling, and pyrolysis of coal reactor of the present invention and circular fluid bed can run relatively independently, the two interferes with each other relatively little, in addition, by the direct heat of the hot semicoke produced in pyrolysis of coal reactor is delivered to and circular fluid bed and coal mixed firing, the combustion stability of circular fluid bed can not only be guaranteed, and can capacity usage ratio be significantly improved, and the stability of power generation system can be guaranteed when utilizing this pyrolysis of coal reactor-circular fluid bed combined system to generate electricity.
Pyrolysis of coal reactor-circular fluid bed combined system below with reference to Fig. 1-4 pairs of embodiment of the present invention is described in detail.According to embodiments of the invention, this pyrolysis of coal reactor-circular fluid bed combined system comprises: pyrolysis of coal reactor 100, circular fluid bed 200.
According to embodiments of the invention, pyrolysis of coal reactor 100 has coal entrance 101, semicoke outlet 102 and pyrolysis gas outlet 103, and pyrolysis of coal reactor 100 inside is provided with multilayer heat accumulation type radiant tube 11, and be suitable for coal to carry out pyrolytic reaction, thus semicoke and pyrolysis gas can be obtained.Contriver finds, the pyrolysis of coal reactor of multilayer heat accumulation type radiant tube is set by adopting inside and existing circular fluid bed directly carries out coupling, and without the need to transforming existing circular fluid bed, the hot semicoke produced in pyrolysis of coal reactor can be delivered to circular fluid bed and carry out burning generation heat smoke, thermal source is provided for pyrolytic process owing to adopting heat accumulation type radiant tube in pyrolysis of coal reactor, the flow that can pass into the combustion gas of heat accumulation type radiant tube by adjustment realizes the accurate temperature controlling to pyrolytic process, and this heat accumulation type radiant tube can by realizing commutation and heat storage type combustion fast at two ends, the homogeneity in temperature field in pyrolysis of coal reactor can be ensured, thus the fast pyrogenation efficiency of coal charge can be significantly improved, more traditional use gaseous heat-carrier or solid thermal carriers are compared as the pyrolytic reaction device of pyrolysis thermal source simultaneously, pyrolysis of coal reaction unit of the present invention does not need to arrange preheating unit and carrier separating unit, greatly can simplify fast pyrogenation reaction process flow process, thus significantly reduce device failure rate and in gained tar dust content lower, and then it is complicated to solve existing coal plug leading portion pyrolytic process, and the problem of existing pyrolysis reactor and the high fluctuation of service caused of circular fluid bed coupling, and pyrolysis of coal reactor of the present invention and circular fluid bed can run relatively independently, the two interferes with each other relatively little.
According to one embodiment of present invention, coal entrance 101 can be located at the upper end of pyrolysis of coal reactor 100, and is suitable for coal to be supplied to pyrolysis of coal inside reactor.
According to still a further embodiment, semicoke outlet 102 can be located at the bottom of pyrolysis of coal reactor 100, and pyrolysis of coal reactor discharged by the semicoke solid being suitable for pyrolytic process to produce.
According to still another embodiment of the invention, pyrolysis gas outlet 103 can be located on the sidewall of pyrolysis of coal reactor 100, and the pyrolysis gas being suitable for pyrolytic process to produce discharges pyrolysis of coal reactor.
According to still another embodiment of the invention, multilayer heat accumulation type radiant tube 11 is spaced apart along height for reactor direction in pyrolysis of coal reactor 100, and every layer of heat accumulation type radiant tube comprises multiple heat accumulation type radiant tube spaced apart in the horizontal direction, according to a particular embodiment of the invention, every layer of heat accumulation type radiant tube comprises multiple parallel and equally distributed heat accumulation type radiant tube and each heat accumulation type radiant tube is parallel with each heat accumulation type radiant tube in adjacent upper and lower two-layer heat accumulation type radiant tube and be in staggered distribution along height for reactor direction.Thus, the fast pyrogenation efficiency of coal charge can be significantly improved, and then improve the productive rate of tar.
According to embodiments of the invention, circular fluid bed 200 have oil fuel burner 21, semicoke entrance 201, coal import 202 and exhanst gas outlet 203, semicoke entrance 201 and semicoke export 102 and are connected, and are suitable for coal and semicoke to carry out mixed firing, thus can obtain heat smoke.Contriver finds, by the direct heat of the hot semicoke produced in pyrolysis of coal reactor is delivered to and circular fluid bed and coal mixed firing, the combustion stability of circular fluid bed can not only be guaranteed, and capacity usage ratio can be significantly improved, and the stability of power generation system can be guaranteed when utilizing the heat smoke produced in this pyrolysis of coal reactor-circular fluid bed combined system to generate electricity.
With reference to figure 2, pyrolysis of coal reactor-circular fluid bed combined system comprises spray equipment 300 further according to an embodiment of the invention.
According to embodiments of the invention, spray equipment 300 has pyrolysis gas entrance 301, cooling fluid entrance 302, combustible gas outlet 303 and coal tar outlet 304, pyrolysis gas entrance 301 is connected with pyrolysis gas outlet 103, and be suitable for adopting cooling fluid that pyrolysis gas is carried out cooling process, thus can be separated and obtain coal tar and combustible gas.Concrete, cooling fluid can adopt coal tar.Contriver finds, by adopting spray equipment that produced pyrolysis gas is separated into flammable and coal tar oil gas, comparatively prior art compares chemical systems such as can saving petroleum vapor recovery utilization, thus reduces equipment investment cost.
With reference to figure 3, according to embodiments of the invention, combustible gas outlet 303 on spray equipment 300 can be connected with heat accumulation type radiant tube 11, and the part being suitable for the combustible gas obtained by spray equipment is supplied to heat accumulation type radiant tube uses as fuel, and another part can be sent into gas-purification converter unit and produces Sweet natural gas or directly deliver to industrial user and use.Thus, be supplied to heat accumulation type radiant tube use as fuel by combustible gas internal system produced, not only can reduce the dependence of pyrolysis of coal reactor to extra power, and significantly can reduce production cost, the comprehensive reasonable realizing the energy utilizes.Concrete, the combustible gas that spray equipment can obtain by arranging air delivery device between pyrolysis of coal reactor and spray equipment by those skilled in the art is according to actual needs supplied to the heat accumulation type radiant tube in pyrolysis of coal reactor, such as, can adopt blower fan, air pump etc.
According to embodiments of the invention, coal tar outlet 304 on spray equipment 300 is connected with the oil fuel burner 21 on circular fluid bed, and be suitable for the part being separated the coal tar obtained in spray equipment to use as the igniting of the oil fuel burner in circular fluid bed and peak regulation oil, and another part can be sold as product, preferably the heavy oil in described coal tar is separated and the oil fuel burner being supplied to described circular fluid bed as fuel.
With reference to figure 4, the pyrolysis of coal reactor-circular fluid bed combined system according to the embodiment of the present invention comprises U-shaped valve 400 further.
According to embodiments of the invention, U-shaped valve 400 is arranged on the bottom of pyrolysis of coal reactor 100, U-shaped valve 400 connects the semicoke outlet 102 on pyrolysis of coal reactor 100 and the semicoke entrance 201 on circular fluid bed respectively, and is suitable for utilizing air or nitrogen that semicoke is supplied to circular fluid bed 200.Thus, adopt U-shaped valve that semicoke heat is delivered to circular fluid bed, only First air need be taked to carry, comparatively mechanical transport is compared, and can significantly reduce failure rate and energy consumption.
In second of the present invention, the present invention proposes the pyrolysis of coal reactor-application of circular fluid bed combined system for generating electricity.
In 3rd of the present invention, the present invention proposes a kind of method processing coal.According to embodiments of the invention, the method utilizes pyrolysis of coal reactor-circular fluid bed combined system to carry out.According to a particular embodiment of the invention, the method comprises: coal is delivered to described pyrolysis of coal reactor and carries out pyrolysis processing by (1), to obtain semicoke and pyrolysis gas; (2) described semicoke is delivered in described circular fluid bed, makes described semicoke and coal carry out mixed firing, to obtain flue gas; (3) described pyrolysis gas is delivered to described spray equipment and carries out cooling process, thus obtain combustible gas and coal tar.
Contriver finds, the pyrolysis of coal reactor of multilayer heat accumulation type radiant tube is set by adopting inside and existing circular fluid bed directly carries out coupling, and without the need to transforming existing circular fluid bed, the hot semicoke produced in pyrolysis of coal reactor can be delivered to circular fluid bed and carry out burning generation heat smoke, thermal source is provided for pyrolytic process owing to adopting heat accumulation type radiant tube in pyrolysis of coal reactor, the flow that can pass into the combustion gas of heat accumulation type radiant tube by adjustment realizes the accurate temperature controlling to pyrolytic process, and this heat accumulation type radiant tube can by realizing commutation and heat storage type combustion fast at two ends, the homogeneity in temperature field in pyrolysis of coal reactor can be ensured, thus the fast pyrogenation efficiency of coal charge can be significantly improved, more traditional use gaseous heat-carrier or solid thermal carriers are compared as the pyrolytic reaction device of pyrolysis thermal source simultaneously, pyrolysis of coal reaction unit of the present invention does not need to arrange preheating unit and carrier separating unit, greatly can simplify fast pyrogenation reaction process flow process, thus significantly reduce device failure rate and in gained tar dust content lower, and then it is complicated to solve existing coal plug leading portion pyrolytic process, and the problem of existing pyrolysis reactor and the high fluctuation of service caused of circular fluid bed coupling, and pyrolysis of coal reactor of the present invention and circular fluid bed can run relatively independently, the two interferes with each other relatively little, adopt this pyrolysis of coal reactor can improve coal tar productive rate in addition simultaneously, by the direct heat of the hot semicoke produced in pyrolysis of coal reactor is delivered to and circular fluid bed and coal mixed firing, the combustion stability of circular fluid bed can not only be guaranteed, and can capacity usage ratio be significantly improved, and the stability of power generation system can be guaranteed when utilizing this pyrolysis of coal reactor-circular fluid bed combined system to generate electricity.It should be noted that, the above-mentioned method being equally applicable to this process coal for the feature and advantage described by pyrolysis of coal reactor-circular fluid bed combined system, repeats no more herein.
Method below with reference to the process coal of Fig. 5-7 pairs of embodiment of the present invention is described in detail.According to embodiments of the invention, the method comprises:
S100: coal is delivered to pyrolysis of coal reactor and carries out pyrolysis processing
According to embodiments of the invention, coal charge is supplied to pyrolysis of coal reactor through coal entrance, and supplies fuel in the heat accumulation type radiant tube in pyrolysis of coal reactor, to adopt pyrolysis of coal reactor to carry out pyrolytic reaction to coal, thus semicoke and pyrolysis gas can be obtained.Contriver finds, the pyrolysis of coal reactor of multilayer heat accumulation type radiant tube is set by adopting inside and existing circular fluid bed directly carries out coupling, and without the need to transforming existing circular fluid bed, the hot semicoke produced in pyrolysis of coal reactor can be delivered to circular fluid bed and carry out burning generation heat smoke, thermal source is provided for pyrolytic process owing to adopting heat accumulation type radiant tube in pyrolysis of coal reactor, the flow that can pass into the combustion gas of heat accumulation type radiant tube by adjustment realizes the accurate temperature controlling to pyrolytic process, and this heat accumulation type radiant tube can by realizing commutation and heat storage type combustion fast at two ends, the homogeneity in temperature field in pyrolysis of coal reactor can be ensured, thus the fast pyrogenation efficiency of coal charge can be significantly improved, more traditional use gaseous heat-carrier or solid thermal carriers are compared as the pyrolytic reaction device of pyrolysis thermal source simultaneously, pyrolysis of coal reaction unit of the present invention does not need to arrange preheating unit and carrier separating unit, greatly can simplify fast pyrogenation reaction process flow process, thus significantly reduce device failure rate and in gained tar dust content lower, and then it is complicated to solve existing coal plug leading portion pyrolytic process, and the problem of existing pyrolysis reactor and the high fluctuation of service caused of circular fluid bed coupling, and pyrolysis of coal reactor of the present invention and circular fluid bed can run relatively independently, the two interferes with each other relatively little.
S200: semicoke is delivered to circular fluid bed
According to embodiments of the invention, the semicoke produced is supplied in circular fluid bed through semicoke entrance and carries out mixed firing with coal, thus can flue gas be obtained in pyrolysis of coal reactor.Concrete, the semicoke produced in pyrolysis of coal reactor is 400 ~ 600 DEG C.Contriver finds, by the direct heat of the hot semicoke produced in pyrolysis of coal reactor is delivered to and circular fluid bed and coal mixed firing, the combustion stability of circular fluid bed can not only be guaranteed, and capacity usage ratio can be significantly improved, and the stability of power generation system can be guaranteed when utilizing the flue gas produced in this process to generate electricity.
According to a specific embodiment of the present invention, in this step, the concrete particle diameter of coal is also not particularly limited, as long as circulating fluidized bed Particle size requirements can be met, such as can coal ore grinding to below particle diameter 10mm.
According to another specific embodiment of the present invention, by the U-shaped valve being arranged on pyrolysis of coal reactor lower part, the semicoke produced in pyrolysis of coal reactor can be supplied to circular fluid bed.Thus, adopt U-shaped valve that semicoke heat is delivered to circular fluid bed, only First air need be taked to carry, comparatively mechanical transport is compared, and can significantly reduce failure rate and energy consumption.
With reference to figure 6, the method according to the process coal of the embodiment of the present invention comprises further:
S300: pyrolysis gas is delivered to spray equipment and carries out cooling process
According to embodiments of the invention, the pyrolysis gas produced in pyrolysis of coal reactor is supplied to spray equipment through pyrolysis gas entrance, to adopt cooling fluid to carry out cooling process to pyrolysis gas, thus can be separated and obtains coal tar and combustible gas.Concrete, cooling fluid can adopt coal tar.Contriver finds, by adopting spray equipment to carry out cooling process to pyrolysis gas, can be separated and obtain coal tar, thus can improve the value of system.
S400 a: part for combustible gas is supplied to heat accumulation type radiant tube and uses as fuel
According to embodiments of the invention, a part for the combustible gas obtained by spray equipment is supplied to heat accumulation type radiant tube and uses as fuel, and another part can be sent into gas-purification converter unit production Sweet natural gas or directly deliver to industrial user's use.Thus, be supplied to heat accumulation type radiant tube use as fuel by combustible gas internal system produced, not only can reduce the dependence of pyrolysis of coal reactor to extra power, and significantly can reduce production cost, the comprehensive reasonable realizing the energy utilizes.Concrete, the combustible gas that spray equipment can obtain by arranging air delivery device between pyrolysis of coal reactor and spray equipment by those skilled in the art is according to actual needs supplied to the heat accumulation type radiant tube in pyrolysis of coal reactor, such as, can adopt blower fan, air pump etc.
With reference to figure 7, the method according to the process coal of the embodiment of the present invention comprises further:
S500 a: part for coal tar is supplied to the oil fuel burner on circular fluid bed
According to embodiments of the invention, the part being separated the coal tar obtained is used as the igniting of the oil fuel burner on circular fluid bed and peak regulation oil, and another part can be sold as product in spray equipment.Thus, used as the igniting of the oil fuel burner in circular fluid bed and peak regulation oil by the coal tar that will obtain in combined system of the present invention, can raw materials cost be reduced.
The present inventor is surprised to find, pyrolysis of coal reactor of the present invention can coupling direct with existing circular fluid bed, and without the need to transforming existing circular fluid bed, particularly, in pyrolysis of coal reactor-circular fluid bed combined system of the present invention, compared with the system of existing pyrolysis of coal plug technique-circulating fluidized bed generating set coupling, pyrolysis of coal reactor and circular fluid bed can run relatively independently, the two interferes with each other relatively little, thus can guarantee the stability of power generation system.
Below with reference to specific embodiment, present invention is described, it should be noted that, these embodiments are only descriptive, and do not limit the present invention in any way.
Embodiment
Take coal as raw material, pyrolysis of coal reactor-circular fluid bed combined system is utilized to generate electricity, the structure of pyrolysis of coal reactor-circular fluid bed combined system as shown in Figure 4, as shown in Figure 8, the method utilizing this pyrolysis of coal reactor-circular fluid bed to carry out generating electricity is as follows for generating flow process:
(1) 100 tons of coals are carried out pulverization process, to below particle diameter 10mm;
(2) coal of pulverizing is sent into pyrolysis of coal reactor and carry out pyrolysis, Multi-layer warming radiator tube is provided with in this pyrolysis of coal reactor, pyrolysis obtains semicoke (508 DEG C) and pyrolysis gas (temperature is 512 DEG C), and the pyrolysis char of generation reaches 58.91 tons;
(3) by being blown into cloth gas to U-shaped valve, 58.91 tons of pyrolysis chars are directly sent in circular fluid bed, carry out mixed firing with 60 tons of raw coal powder, produce a large amount of heat smoke;
(4) heat-exchange system in heat smoke and circular fluid bed is carried out heat exchange, produce water vapor (23.5Mpa, 558 degrees Celsius), utilize the steam of generation to generate electricity thus;
(5) pyrolysis gas obtained in step (2) is carried out cooling process through spray equipment, obtain combustible gas and coal tar, CH in combustible gas
4content is up to 41.5%;
(6) a part of combustible gas that step (5) obtains is delivered to the radiator tube of pyrolysis of coal reactor as fuel, another part can be sent into gas-purification converter unit and produce Sweet natural gas or directly deliver to industrial user's use.
(7) coal tar obtained in step (5) is delivered to oil fuel burner on circular fluid bed as igniting and peak regulation oily.
Comparative example
This comparative example is identical with embodiment, and difference is only that the fuel of circular fluid bed is all feed coal, produces the water vapor (23.5Mpa, 558 degrees Celsius) of same quality.
Result as shown in table 1, compared with comparative example, the generating standard coal consumption of embodiment have dropped nearly 2g/kwh, and for 2 × 350MW power station (year generating hours 5500h), year saves coal amount 7320 tons.
Table 1 embodiment and comparative example energy efficiency compare
| Project | Generating standard coal consumption (g/kwh) |
| Embodiment | 314.7 |
| Comparative example | 316.6 |
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification sheets or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. pyrolysis of coal reactor-circular fluid bed combined system, is characterized in that, comprising:
Pyrolysis of coal reactor, described pyrolysis of coal reactor has semicoke outlet and pyrolysis gas outlet, and described pyrolysis of coal inside reactor is provided with multilayer heat accumulation type radiant tube;
Circular fluid bed, described circular fluid bed has semicoke entrance and exhanst gas outlet, and described semicoke entrance exports with described semicoke and is connected.
2. pyrolysis of coal reactor-circular fluid bed combined system according to claim 1, it is characterized in that, comprise further: spray equipment, described spray equipment has pyrolysis gas entrance, and described pyrolysis gas entrance is connected with described pyrolysis gas outlet.
3. pyrolysis of coal reactor-circular fluid bed combined system according to claim 1 and 2, it is characterized in that, described spray equipment has coal tar outlet, described circular fluid bed has tar burner, and described coal tar outlet is connected with described tar burner.
4. the pyrolysis of coal reactor-circular fluid bed combined system according to any one of claim 1-3, is characterized in that, described spray equipment has combustible gas outlet, and described combustible gas outlet is connected with described heat accumulation type radiant tube.
5. the pyrolysis of coal reactor-circular fluid bed combined system according to any one of claim 1-4, it is characterized in that, every layer of described heat accumulation type radiant tube comprises multiple parallel and equally distributed heat accumulation type radiant tube, and each described heat accumulation type radiant tube is parallel with each heat accumulation type radiant tube in adjacent upper and lower two-layer heat accumulation type radiant tube and be in staggered distribution along on the body height direction of described pyrolysis of coal reactor.
6. the pyrolysis of coal reactor-circular fluid bed combined system according to any one of claim 1-5, is characterized in that, comprise further:
U-shaped valve, described U-shaped valve is arranged on the bottom of described pyrolysis of coal reactor, and described U-shaped valve connects the outlet of described semicoke and described semicoke entrance.
7. the pyrolysis of coal reactor according to any one of the claim 1-6-application of circular fluid bed combined system for generating electricity.
8. utilize a method for the pyrolysis of coal reactor-circular fluid bed combined system process coal described in any one of claim 1-6, it is characterized in that, comprising:
(1) coal is delivered to described pyrolysis of coal reactor and carries out pyrolysis processing, to obtain semicoke and pyrolysis gas;
(2) described semicoke is delivered in described circular fluid bed, makes described semicoke and coal carry out mixed firing, to obtain flue gas.
9. method according to claim 8, is characterized in that, comprises further: described pyrolysis gas is delivered to described spray equipment and carries out cooling process, thus obtain combustible gas and coal tar,
Optional, a part for described combustible gas is supplied to described heat accumulation type radiant tube and uses as fuel,
Optionally, a part for described coal tar is supplied to the oil fuel burner of described circular fluid bed as fuel, preferably the heavy oil in described coal tar is separated and the oil fuel burner being supplied to described circular fluid bed as fuel.
10. the method according to Claim 8 according to any one of-9, is characterized in that, in step (2), by U-shaped valve, described semicoke is supplied to described circular fluid bed.
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| CN105861010A (en) * | 2016-06-16 | 2016-08-17 | 北京神雾环境能源科技集团股份有限公司 | Coal-pyrolysis-reactor and circulating-fluidized-bed-boiler combination system and method for treating coal |
| CN105950197A (en) * | 2016-06-16 | 2016-09-21 | 北京神雾环境能源科技集团股份有限公司 | Coal pyrolysis device and circulating fluidized bed combined system and coal processing method |
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