CN205443192U - Coal pyrolytic reaction ware - circulating fluidized bed boiler combined system - Google Patents
Coal pyrolytic reaction ware - circulating fluidized bed boiler combined system Download PDFInfo
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- CN205443192U CN205443192U CN201521129473.8U CN201521129473U CN205443192U CN 205443192 U CN205443192 U CN 205443192U CN 201521129473 U CN201521129473 U CN 201521129473U CN 205443192 U CN205443192 U CN 205443192U
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Abstract
The utility model discloses a coal pyrolytic reaction ware - circulating fluidized bed boiler combined system, this coal pyrolytic reaction ware - circulating fluidized bed boiler combined system includes: coal pyrolytic reaction ware, coal pyrolytic reaction utensil has semi -coke outlet and pyrolysis gas to export, and the inside multilayer regenerative radiant tube that is provided with of coal pyrolytic reaction ware, the circulating fluidized bed boiler, semicoke entry and exhanst gas outlet have on the circulating fluidized bed boiler, semicoke entry with semi -coke outlet links to each other. This combined system can solve the coal and pull out first anterior segment pyrolytic process complicacy, and leads to the unstable problem of operation with circulating fluidized bed coupling nature height, can ensure power generation system's stability when utilizing this coal pyrolytic reaction ware - circulating fluidized bed boiler combined system to generate electricity simultaneously.
Description
Technical field
This utility model belongs to technical field of coal chemical industry, and specifically, this utility model relates to a kind of pyrolysis of coal reactor-CFBB combined system.
Background technology
The semicoke produced after pyrolysis of coal can be used for generating electricity as fuel.In the prior art, pyrolysis of coal plug technique is primarily directed to recirculating fluidized bed generating set.Existing pyrolysis of coal electricity generation system uses CFBB mostly, and such system, owing to taking more complicated solid thermal carriers technique, exists many defects.Such as, existing recirculating fluidized bed generating set requires that CFBB runs well with pyrolysis of coal reactor simultaneously, if a method, system changes, will cause the whole technique cannot stable operation, this does not meets China's requirement 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 big.
Therefore, existing recirculating fluidized bed generating set is further improved.
Utility model content
One of technical problem that this utility model is intended to solve in correlation technique the most to a certain extent.For this, a purpose of the present utility model is to propose a kind of pyrolysis of coal reactor-CFBB combined system, it is complicated that this combined system can solve coal plug leading portion pyrolytic process, and cause the problem of fluctuation of service with recirculating fluidized bed coupling height, utilize this pyrolysis of coal reactor-CFBB combined system when generating electricity, to be able to ensure that the stability of electricity generation system simultaneously.
At an aspect of the present utility model, the utility model proposes a kind of pyrolysis of coal reactor-CFBB combined system.According to embodiment of the present utility model, this combined system includes:
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 multilamellar heat accumulation type radiant tube；
CFBB, described CFBB has semicoke entrance and exhanst gas outlet, and described semicoke entrance is connected with the outlet of described semicoke.
Inventor has surprisingly observed that, pyrolysis of coal reactor of the present utility model directly can be combined with existing CFBB, and without existing CFBB is transformed, particularly, in pyrolysis of coal reactor-CFBB combined system of the present utility model, with existing pyrolysis of coal plug technique-recirculating fluidized bed generating set associated with compared with system, pyrolysis of coal reactor and CFBB can run relatively independently, and the two interferes with each other relatively small.When pyrolysis of coal reactor-CFBB combined system of the present utility model is used for generating electricity, it can be ensured that the stability of electricity generation system.
Optional, described pyrolysis of coal reactor-CFBB combined system farther includes: spray equipment, and described spray equipment has pyrolysis gas entrance, and described pyrolysis gas entrance is connected with described pyrolysis gas outlet.
Optional, described spray equipment has coal tar outlet, and described CFBB has tar burner, and the outlet of described coal tar is connected with described tar burner.By the system of the present embodiment, the coal tar produced in this utility model pyrolysis of coal reactor-CFBB combined system can serve as igniting and the peak regulation oil of the oil burner of CFBB.
Optional, every layer of described heat accumulation type radiant tube includes 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 is in staggered distribution along the body height direction of described pyrolysis of coal reactor.Thus, it is possible to significantly improve the fast pyrogenation efficiency of coal charge, and then improve the productivity of coal tar.
Optional, described spray equipment has combustible gas outlet, and the outlet of described combustible gas is connected with described heat accumulation type radiant tube.By the system of the present embodiment, the combustible gas produced in this utility model pyrolysis of coal reactor-CFBB combined system can be utilized by this system self, it is achieved self-heating.
Optional, described pyrolysis of coal reactor-CFBB combined system farther includes: U-shaped valve, described U-shaped valve is arranged on the bottom of described pyrolysis of coal reactor, and described U-shaped valve connects semicoke outlet and the semicoke entrance of described CFBB of described pyrolysis of coal reactor.Such U-shaped valve can be sent the supply of described semicoke to described CFBB by wind, thus significantly reduces fault rate and the energy consumption of system.Wind send and can realize by being blown into noble gas, such as nitrogen etc..
Additional aspect of the present utility model and advantage will part be given in the following description, and part will become apparent from the description below, or is recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will be apparent from easy to understand, wherein from combining the accompanying drawings below description to embodiment:
Fig. 1 is the structural representation of the pyrolysis of coal reactor-CFBB combined system according to one embodiment of this utility model；
Fig. 2 is the structural representation of the pyrolysis of coal reactor-CFBB combined system according to this utility model further embodiment；
Fig. 3 is the structural representation of the pyrolysis of coal reactor-CFBB combined system according to another embodiment of this utility model；
Fig. 4 is the structural representation of the pyrolysis of coal reactor-CFBB combined system according to another embodiment of this utility model；
Fig. 5 is the method flow schematic diagram using the pyrolysis of coal reactor-CFBB combined system of one embodiment of this utility model to carry out processing coal；
Fig. 6 is the method flow schematic diagram using the pyrolysis of coal reactor-CFBB combined system of this utility model further embodiment to carry out processing coal；
Fig. 7 is the method flow schematic diagram using the pyrolysis of coal reactor-CFBB combined system of another embodiment of this utility model to carry out processing coal；
Fig. 8 is that the pyrolysis of coal reactor-CFBB combined system that utilizes according to one embodiment of this utility model carries out the system structure schematic diagram generated electricity.
Detailed description of the invention
Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, and the most same or similar label represents same or similar element or has the element of same or like function.The embodiment described below with reference to accompanying drawing is exemplary, it is intended to be used for explaining this utility model, and it is not intended that to restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", on " ", D score, " front ", " afterwards ", " left ", " right ", " vertically ", " level ", " push up ", " end ", " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumferential " are based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two, three etc., unless otherwise expressly limited specifically.
In this utility model, unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection ", the term such as " fixing " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in this utility model can be understood as the case may be.
In this utility model, 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 mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
At an aspect of the present utility model, the utility model proposes a kind of pyrolysis of coal reactor-CFBB combined system.According to embodiment of the present utility model, this pyrolysis of coal reactor-CFBB combined system includes: 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 multilamellar heat accumulation type radiant tube；CFBB, described CFBB has tar burner, semicoke entrance and exhanst gas outlet, and described semicoke entrance is connected with the outlet of described semicoke.
nullInventor finds，By using the internal pyrolysis of coal reactor arranging multilamellar heat accumulation type radiant tube to be directly combined with existing CFBB，And without existing CFBB is transformed，The hot semicoke produced in pyrolysis of coal reactor can be delivered to CFBB and carry out burning generation heat smoke，Owing to pyrolysis of coal reactor using heat accumulation type radiant tube provide thermal source for pyrolytic process，The accurate temperature controlling to pyrolytic process can be realized by the flow of the combustion gas that adjustment is passed through heat accumulation type radiant tube，And this heat accumulation type radiant tube can be by realizing quickly commutation and heat storage type combustion at two ends，Can ensure that the uniformity in temperature field in pyrolysis of coal reactor，Such that it is able to significantly improve the fast pyrogenation efficiency of coal charge，The most traditional use gas heat carrier or solid thermal carriers are compared as the pyrolytic reaction device being pyrolyzed thermal source，Pyrolysis of coal reaction unit of the present utility model need not arrange preheating unit and carrier separative element，Fast pyrogenation reaction process flow process can be greatly simplified，Thus it is relatively low to significantly reduce dust content in the fault rate of device and gained tar，And then it is complicated to solve existing coal plug leading portion pyrolytic process，And the problem of fluctuation of service that existing pyrolysis reactor causes with CFBB coupling height，And pyrolysis of coal reactor of the present utility model and CFBB can run relatively independently，The two interferes with each other relatively small，Additionally，By the hot semicoke directly heat produced in pyrolysis of coal reactor being delivered to and CFBB and coal mixed combustion，The combustion stability of CFBB can not only be guaranteed，And capacity usage ratio can be significantly improved，And when the stability utilizing this pyrolysis of coal reactor-CFBB combined system to be able to ensure that electricity generation system when generating electricity.
Pyrolysis of coal reactor-CFBB combined system below with reference to-4 pairs of this utility model embodiments of Fig. 1 is described in detail.According to embodiment of the present utility model, this pyrolysis of coal reactor-CFBB combined system includes: pyrolysis of coal reactor 100, CFBB 200.
According to embodiment of the present utility model, pyrolysis of coal reactor 100 has coal entrance 101, semicoke outlet 102 and pyrolysis gas outlet 103, and pyrolysis of coal reactor 100 is internally provided with multilamellar heat accumulation type radiant tube 11, and is suitable to coal is carried out pyrolytic reaction, such that it is able to obtain semicoke and pyrolysis gas.nullInventor finds，By using the internal pyrolysis of coal reactor arranging multilamellar heat accumulation type radiant tube to be directly combined with existing CFBB，And without existing CFBB is transformed，The hot semicoke produced in pyrolysis of coal reactor can be delivered to CFBB and carry out burning generation heat smoke，Owing to pyrolysis of coal reactor using heat accumulation type radiant tube provide thermal source for pyrolytic process，The accurate temperature controlling to pyrolytic process can be realized by the flow of the combustion gas that adjustment is passed through heat accumulation type radiant tube，And this heat accumulation type radiant tube can be by realizing quickly commutation and heat storage type combustion at two ends，Can ensure that the uniformity in temperature field in pyrolysis of coal reactor，Such that it is able to significantly improve the fast pyrogenation efficiency of coal charge，The most traditional use gas heat carrier or solid thermal carriers are compared as the pyrolytic reaction device being pyrolyzed thermal source，Pyrolysis of coal reaction unit of the present utility model need not arrange preheating unit and carrier separative element，Fast pyrogenation reaction process flow process can be greatly simplified，Thus it is relatively low to significantly reduce dust content in the fault rate of device and gained tar，And then it is complicated to solve existing coal plug leading portion pyrolytic process，And the problem of fluctuation of service that existing pyrolysis reactor causes with CFBB coupling height，And pyrolysis of coal reactor of the present utility model and CFBB can run relatively independently，The two interferes with each other relatively small.
According to an embodiment of the present utility model, coal entrance 101 can be located at the upper end of pyrolysis of coal reactor 100, and is suitable to supply to pyrolysis of coal inside reactor coal.
According to further embodiment of the present utility model, 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 to produce pyrolytic process.
According to another embodiment of the present utility model, pyrolysis gas outlet 103 can be located on the sidewall of pyrolysis of coal reactor 100, and the pyrolysis gas being suitable to produce pyrolytic process discharges pyrolysis of coal reactor.
According to another embodiment of the present utility model, multilamellar 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 includes the heat accumulation type radiant tube of multiple horizontally spaced distribution, according to specific embodiment of the utility model, every layer of heat accumulation type radiant tube includes that multiple parallel and equally distributed heat accumulation type radiant tube and each heat accumulation type radiant tube are parallel with each heat accumulation type radiant tube in adjacent upper and lower two-layer heat accumulation type radiant tube and are in staggered distribution along height for reactor direction.Thus, it is possible to significantly improve the fast pyrogenation efficiency of coal charge, and then improve the productivity of tar.
According to embodiment of the present utility model, there is on CFBB 200 oil burner 21, semicoke entrance 201, coal import 202 and exhanst gas outlet 203, semicoke entrance 201 is connected with semicoke outlet 102, and is suitable to coal and semicoke are carried out mixed combustion, such that it is able to obtain heat smoke.Inventor finds, by the hot semicoke directly heat produced in pyrolysis of coal reactor being delivered to and CFBB and coal mixed combustion, the combustion stability of CFBB can not only be guaranteed, and capacity usage ratio can be significantly improved, and it is able to ensure that the stability of electricity generation system when utilizing the heat smoke produced in this pyrolysis of coal reactor-CFBB combined system to generate electricity.
With reference to Fig. 2, farther include spray equipment 300 according to the pyrolysis of coal reactor-CFBB combined system of embodiment of the present utility model.
According to embodiment of the present utility model, spray equipment 300 has pyrolysis gas entrance 301, coolant inlet 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 use with coolant pyrolysis gas is carried out cooling process, such that it is able to isolated coal tar and combustible gas.Concrete, coolant can use coal tar.Inventor finds, by using spray equipment that produced pyrolysis gas is separated into flammable and coal tar oil gas, can save the chemical systems such as petroleum vapor recovery utilization compared with the prior art, thus reduce equipment investment cost.
With reference to Fig. 3, according to embodiment of the present utility model, combustible gas outlet 303 on spray equipment 300 can be connected with heat accumulation type radiant tube 11, and the part supply of the combustible gas being suitable to obtain spray equipment uses to heat accumulation type radiant tube as fuel, and another part can be sent into gas-purification converter unit and produces natural gas or be fed directly to industrial user's use.Thus, used as fuel to heat accumulation type radiant tube by the combustible gas supply that internal system is produced, be possible not only to reduce the dependence to extra power of the pyrolysis of coal reactor, and production cost can be significantly reduced, it is achieved the comprehensive reasonable of the energy utilizes.Concrete, the combustible gas that spray equipment can be obtained by those skilled in the art according to actual needs by arranging air delivery device between pyrolysis of coal reactor and spray equipment supplies the heat accumulation type radiant tube to pyrolysis of coal reactor, such as, can use blower fan, air pump etc..
According to embodiment of the present utility model, coal tar outlet 304 on spray equipment 300 is connected with the oil burner 21 on CFBB, and be suitable to use a part for the coal tar of isolated in spray equipment as igniting and the peak regulation oil of the oil burner in CFBB, and another part can be sold as product, the oil burner preferably heavy oil in described coal tar separated and supplied to described CFBB is as fuel.
With reference to Fig. 4, farther include U-shaped valve 400 according to the pyrolysis of coal reactor-CFBB combined system of this utility model embodiment.
According to embodiment of the present utility model, 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 CFBB respectively, and is suitable to utilize air or nitrogen to supply semicoke to CFBB 200.Thus, using U-shaped valve that semicoke heat is delivered to CFBB, only First air need to be taked to carry, more mechanical conveying is compared, and can significantly reduce fault rate and energy consumption.
According to embodiment of the present utility model, this pyrolysis of coal reactor-CFBB combined system may be used for the application of generating.
Understanding for convenience, the method that the pyrolysis of coal reactor-CFBB combined system using one embodiment of this utility model carries out processing coal below is described.According to embodiment of the present utility model, the method includes: coal is delivered to described pyrolysis of coal reactor and carries out pyrolysis processing by (1), in order to obtain semicoke and pyrolysis gas；(2) described semicoke is delivered in described CFBB, makes described semicoke and coal carry out mixed combustion, in order 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.
nullInventor finds，By using the internal pyrolysis of coal reactor arranging multilamellar heat accumulation type radiant tube to be directly combined with existing CFBB，And without existing CFBB is transformed，The hot semicoke produced in pyrolysis of coal reactor can be delivered to CFBB and carry out burning generation heat smoke，Owing to pyrolysis of coal reactor using heat accumulation type radiant tube provide thermal source for pyrolytic process，The accurate temperature controlling to pyrolytic process can be realized by the flow of the combustion gas that adjustment is passed through heat accumulation type radiant tube，And this heat accumulation type radiant tube can be by realizing quickly commutation and heat storage type combustion at two ends，Can ensure that the uniformity in temperature field in pyrolysis of coal reactor，Such that it is able to significantly improve the fast pyrogenation efficiency of coal charge，The most traditional use gas heat carrier or solid thermal carriers are compared as the pyrolytic reaction device being pyrolyzed thermal source，Pyrolysis of coal reaction unit of the present utility model need not arrange preheating unit and carrier separative element，Fast pyrogenation reaction process flow process can be greatly simplified，Thus it is relatively low to significantly reduce dust content in the fault rate of device and gained tar，And then it is complicated to solve existing coal plug leading portion pyrolytic process，And the problem of fluctuation of service that existing pyrolysis reactor causes with CFBB coupling height，And pyrolysis of coal reactor of the present utility model and CFBB can run relatively independently，The two interferes with each other relatively small，Use this pyrolysis of coal reactor can improve coal tar productivity additionally simultaneously，By the hot semicoke directly heat produced in pyrolysis of coal reactor being delivered to and CFBB and coal mixed combustion，The combustion stability of CFBB can not only be guaranteed，And capacity usage ratio can be significantly improved，And when the stability utilizing this pyrolysis of coal reactor-CFBB combined system to be able to ensure that electricity generation system when generating 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-CFBB combined system, here is omitted.
The method carrying out processing coal to the pyrolysis of coal reactor-CFBB combined system of employing one embodiment of this utility model below with reference to Fig. 5-7 is described in detail.According to embodiment of the present utility model, the method includes:
S100: coal is delivered to pyrolysis of coal reactor and carries out pyrolysis processing
According to embodiment of the present utility model, coal charge is supplied to pyrolysis of coal reactor through coal entrance, and the heat accumulation type radiant tube in pyrolysis of coal reactor supplies fuel, in order to use pyrolysis of coal reactor coal to be carried out pyrolytic reaction, such that it is able to obtain semicoke and pyrolysis gas.nullInventor finds，By using the internal pyrolysis of coal reactor arranging multilamellar heat accumulation type radiant tube to be directly combined with existing CFBB，And without existing CFBB is transformed，The hot semicoke produced in pyrolysis of coal reactor can be delivered to CFBB and carry out burning generation heat smoke，Owing to pyrolysis of coal reactor using heat accumulation type radiant tube provide thermal source for pyrolytic process，The accurate temperature controlling to pyrolytic process can be realized by the flow of the combustion gas that adjustment is passed through heat accumulation type radiant tube，And this heat accumulation type radiant tube can be by realizing quickly commutation and heat storage type combustion at two ends，Can ensure that the uniformity in temperature field in pyrolysis of coal reactor，Such that it is able to significantly improve the fast pyrogenation efficiency of coal charge，The most traditional use gas heat carrier or solid thermal carriers are compared as the pyrolytic reaction device being pyrolyzed thermal source，Pyrolysis of coal reaction unit of the present utility model need not arrange preheating unit and carrier separative element，Fast pyrogenation reaction process flow process can be greatly simplified，Thus it is relatively low to significantly reduce dust content in the fault rate of device and gained tar，And then it is complicated to solve existing coal plug leading portion pyrolytic process，And the problem of fluctuation of service that existing pyrolysis reactor causes with CFBB coupling height，And pyrolysis of coal reactor of the present utility model and CFBB can run relatively independently，The two interferes with each other relatively small.
S200: semicoke is delivered to CFBB
According to embodiment of the present utility model, the semicoke produced in pyrolysis of coal reactor is carried out mixed combustion with coal, such that it is able to obtain flue gas through the supply of semicoke entrance to CFBB.Concrete, the semicoke produced in pyrolysis of coal reactor is 400～600 DEG C.Inventor finds, by the hot semicoke directly heat produced in pyrolysis of coal reactor being delivered to and CFBB and coal mixed combustion, the combustion stability of CFBB can not only be guaranteed, and capacity usage ratio can be significantly improved, and it is able to ensure that the stability of electricity generation system when utilizing the flue gas produced during this to generate electricity.
According to a specific embodiment of the present utility model, in this step, the concrete particle diameter of coal is not particularly restricted, as long as disclosure satisfy that recirculating fluidized bed Particle size requirements, and such as can be with coal ore grinding to below particle diameter 10mm.
According to another specific embodiment of the present utility model, by being arranged on the U-shaped valve of pyrolysis of coal reactor lower part, the semicoke produced in pyrolysis of coal reactor can be supplied to CFBB.Thus, using U-shaped valve that semicoke heat is delivered to CFBB, only First air need to be taked to carry, more mechanical conveying is compared, and can significantly reduce fault rate and energy consumption.
With reference to Fig. 6, the method carrying out processing coal according to the pyrolysis of coal reactor-CFBB combined system of this utility model embodiment farther includes:
S300: pyrolysis gas is delivered to spray equipment and carries out cooling process
According to embodiment of the present utility model, the pyrolysis gas produced in pyrolysis of coal reactor is supplied to spray equipment through pyrolysis gas entrance, in order to use coolant that pyrolysis gas is carried out cooling process, such that it is able to isolated coal tar and combustible gas.Concrete, coolant can use coal tar.Inventor finds, by using spray equipment that pyrolysis gas is carried out cooling process, can be with isolated coal tar, and such that it is able to improve the value of system.
S400: the part supply of combustible gas is used to heat accumulation type radiant tube as fuel
According to embodiment of the present utility model, the part supply of the combustible gas obtained by spray equipment uses to heat accumulation type radiant tube as fuel, and another part can be sent into gas-purification converter unit and produces natural gas or be fed directly to industrial user's use.Thus, used as fuel to heat accumulation type radiant tube by the combustible gas supply that internal system is produced, be possible not only to reduce the dependence to extra power of the pyrolysis of coal reactor, and production cost can be significantly reduced, it is achieved the comprehensive reasonable of the energy utilizes.Concrete, the combustible gas that spray equipment can be obtained by those skilled in the art according to actual needs by arranging air delivery device between pyrolysis of coal reactor and spray equipment supplies the heat accumulation type radiant tube to pyrolysis of coal reactor, such as, can use blower fan, air pump etc..
With reference to Fig. 7, the method carrying out processing coal according to the pyrolysis of coal reactor-CFBB combined system of this utility model embodiment farther includes:
S500: by the oil burner in the part supply of coal tar to CFBB
According to embodiment of the present utility model, a part for the coal tar of isolated in spray equipment is used as igniting and the peak regulation oil of the oil burner on CFBB, and another part can be sold as product.Thus, used as igniting and the peak regulation oil of the oil burner in CFBB by the coal tar that will obtain in this utility model combined system, cost of material can be reduced.
Inventor has surprisingly observed that, pyrolysis of coal reactor of the present utility model directly can be combined with existing CFBB, and without existing CFBB is transformed, particularly, in pyrolysis of coal reactor-CFBB combined system of the present utility model, with existing pyrolysis of coal plug technique-recirculating fluidized bed generating set associated with compared with system, pyrolysis of coal reactor and CFBB can run relatively independently, the two interferes with each other relatively small such that it is able to guarantee the stability of electricity generation system.
Below with reference to specific embodiment, this utility model is described, it should be noted that these embodiments are the most illustrative, and limits this utility model never in any form.
Embodiment
With coal as raw material, pyrolysis of coal reactor-CFBB combined system is utilized to generate electricity, the structure of pyrolysis of coal reactor-CFBB combined system is as shown in Figure 4, as shown in Figure 8, the method utilizing this pyrolysis of coal reactor-CFBB 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 to be pyrolyzed, this pyrolysis of coal reactor is provided with Multi-layer warming radial canal, 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) 58.91 tons of pyrolysis chars are sent directly in CFBB by being blown into cloth gas to U-shaped valve, carry out mixed combustion with 60 tons of raw coal powder, produce a large amount of heat smoke；
(4) heat smoke is carried out heat exchange with the heat-exchange system in CFBB, produce water vapour (23.5Mpa, 558 degrees Celsius), thus utilize the steam of generation to generate electricity；
(5) pyrolysis gas obtained in step (2) is carried out cooling process through spray equipment, obtain combustible gas and coal tar, CH in combustible gas4Content is up to 41.5%；
(6) a part of combustible gas that step (5) obtains being delivered to the radial canal of pyrolysis of coal reactor as fuel, another part can be sent into gas-purification converter unit and produces natural gas or be fed directly to industrial user and use.
(7) oil burner being delivered on CFBB by the coal tar obtained in step (5) is as igniting and peak regulation oil.
Comparative example
This comparative example is identical with embodiment, the difference is that only all feed coals of fuel of CFBB, produces the water vapour (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 as a example by 2 × 350MW power plant (year generating hourage 5500h), year saves coal amount 7320 tons.
Table 1 embodiment and comparative example energy efficiency compare
| Project | Generating standard coal consumption (g/kw h) |
| Embodiment | 314.7 |
| Comparative example | 316.6 |
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means that the specific features, structure, material or the feature that combine this embodiment or example description are contained at least one embodiment of the present utility model or example.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be to combine in one or more embodiments in office or example in an appropriate manner.Additionally, in the case of the most conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be combined and combine by those skilled in the art.
Although above it has been shown and described that embodiment of the present utility model, it is understandable that, above-described embodiment is exemplary, it is not intended that to restriction of the present utility model, above-described embodiment can be changed in the range of this utility model, revises, replace and modification by those of ordinary skill in the art.
Claims (6)
1. pyrolysis of coal reactor-CFBB combined system, it is characterised in that including:
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 multilamellar heat accumulation type radiant tube；
CFBB, described CFBB has semicoke entrance and exhanst gas outlet, and described semicoke entrance is connected with the outlet of described semicoke.
Pyrolysis of coal reactor-CFBB combined system the most according to claim 1, it is characterised in that farther include: spray equipment, described spray equipment has pyrolysis gas entrance, and described pyrolysis gas entrance is connected with described pyrolysis gas outlet.
Pyrolysis of coal reactor-CFBB combined system the most according to claim 2, it is characterized in that, described spray equipment has coal tar outlet, and described CFBB has tar burner, and the outlet of described coal tar is connected with described tar burner.
Pyrolysis of coal reactor-CFBB combined system the most according to claim 3, it is characterised in that described spray equipment has combustible gas outlet, the outlet of described combustible gas is connected with described heat accumulation type radiant tube.
Pyrolysis of coal reactor-CFBB combined system the most according to claim 4, it is characterized in that, every layer of described heat accumulation type radiant tube includes 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 is in staggered distribution along the body height direction of described pyrolysis of coal reactor.
Pyrolysis of coal reactor-CFBB combined system the most according to claim 5, it is characterised in that farther include:
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.
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| CN201521129473.8U CN205443192U (en) | 2015-12-30 | 2015-12-30 | Coal pyrolytic reaction ware - circulating fluidized bed boiler combined system |
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| CN105419832A (en) * | 2015-12-30 | 2016-03-23 | 北京神雾环境能源科技集团股份有限公司 | Coal pyrolysis reactor-circulating fluidized bed boiler combination system and applications thereof |
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