CN210711397U - Poly-generation peak shaving power station system - Google Patents

Abstract

The utility model provides a many coproduction peak shaving power station system, because the height of load has undulant in the electric wire netting, especially to the higher electric wire netting of those renewable energy power generation proportions, requires higher to the peak shaving range of electric machine group in the net. The most basic power generation equipment in our country is a coal-fired steam power station, but the flexibility of peak regulation is limited, in order to operate in a larger load change range, gasified coal is used for supporting combustion when the boiler of the power plant is under low load, the flexibility of peak regulation power generation is greatly improved, the fuel cost is not increased, meanwhile, a gasification furnace device with a tar production function and a dry distillation tank with a tar and semicoke production function are adopted, byproducts tar and semicoke with higher added values can be obtained, the semicoke is formed into clean coal by removing tar and sulfur, a regenerator not only recovers the waste heat of hot semicoke, but also increases the hot coal gas amount, thereby improving the yield of tar and semicoke, improving the peak regulation flexibility of the power plant, and increasing the economic benefit.

Description

Poly-generation peak shaving power station system

Technical Field

The utility model relates to a power generation field especially relates to a polygeneration peak regulation power station system, concrete form is for with bituminous coal, brown coal, peat, coke, semicoke, petroleum coke, living beings, organic rubbish, and other solid type fuel that contain the volatile, adopt and contain the gasification equipment that the dry distillation technology comes the production to contain tar coal gas, combustion-supporting thermal power plant electricity generation behind the tar separation, the peak regulation electricity generation of thermal power plant has both been supported like this, turn into higher priced liquid tar with low-priced solid fuel again, and clean coal fuel semicoke, thereby under consuming same fuel condition, can obtain the product added value higher than ordinary thermal power plant.

Background

Because the load in the power grid fluctuates, the load is usually high in the daytime and low in the nighttime, and particularly for the power grids with higher renewable energy power generation proportion, such as the power grids with more wind generating sets, under the influence of natural environment, the difference between the load peak and the load valley is larger, so that the peak regulation amplitude requirement on the medium-sized thermal power generating sets in the power grid is higher, and meanwhile, the power generation efficiency of the sets is maintained at a higher level when the load is low. The most basic power generation equipment in our country is a coal-fired steam power station, a conventional coal-fired steam power station mainly comprises a boiler and a steam turbine, the fuel price of the conventional coal-fired steam power station is low, the conventional coal-fired steam power station has low running cost and certain peak regulation capacity but limited capacity, generally, only pure coal can be maintained between 50% and 100% of load, and the unit efficiency can be reduced to be lower under the working condition of less than 50% of load, if the thermal power plant can run in a larger load change range, expensive liquid fuel or natural gas is also required to be used for supporting combustion and mixed combustion to maintain the combustion stability of the boiler, because the cost of the latter two fuels is higher, the power plant can be avoided as much as possible, the peak regulation amplitude of the unit is limited, in order to enable the coal-fired power plant to realize wider power grid peak regulation running requirements with lower cost, the coal gasification is supplied to the boiler of the plant for stable combustion, the fuel cost is not increased, or the inferior fuel is combusted by using coal gas for supporting combustion, so that the fuel cost is reduced, meanwhile, a gasification furnace device with a tar production function and a carbonization tank with a semicoke production function are adopted, byproducts tar and semicoke with higher added values can be obtained, the semicoke is used for cleaning coal due to the removal of tar and sulfur, and a heat regenerator is added, so that the waste heat of the hot semicoke is recycled, the hot coal gas amount is increased, the yield of the tar and the semicoke is increased, the peak regulation flexibility of a power plant is improved, and the economic benefit is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a polygeneration peak regulation power station system, its includes gasifier, retort, tar separator, steam turbine, and boiler, and the gasification fuel is solid class fuel, and the gasification equipment who comprises gasifier and retort is sent into to solid fuel, and the gasifier has produced hot coal gas through the oxygen deficiency burning of blast air in the stove, its characterized in that: connecting the hot coal gas to a dry distillation tank filled with solid fuel, producing dry distillation coal gas containing tar, sending the dry distillation coal gas to a tar separation device, separating the tar from the coal gas, connecting a coal gas outlet of the tar separation device or a gasification device to a boiler by a pipeline, or connecting the coal gas outlet of the tar separation device or the gasification device to the boiler and converging the hot coal gas at an outlet of a gasification furnace to enter the dry distillation tank, and simultaneously sending the semicoke discharged from the dry distillation tank to a collection site, or sending the semicoke to the gasification furnace or sending the semicoke to the boiler or converging carbon-containing ash slag discharged from; or a regenerator is arranged at the semicoke outlet of the retort, a coal gas outlet of the tar separation device is firstly connected to the inlet of the regenerator, exchanges heat with the semicoke, and is connected to the boiler through a coal gas pipe from the outlet of the regenerator, or converges into hot coal gas at the outlet of the gasification furnace to enter the retort, or part of the coal gas enters the boiler through the regenerator and is directly converged with the hot coal gas at the outlet of the gasification furnace to enter the retort, or is connected with the boiler and converged with the hot coal gas at the outlet of the gasification furnace to enter the retort, and the semicoke discharged from the retort is sent to a collection site through the regenerator, or is sent to the gasification furnace or is sent to the boiler or converged with carbon-containing ash discharged from.

The solid fuel used by the gasification device is bituminous coal, lignite, peat, semicoke, petroleum coke, straw, biomass, waste rubber, waste plastic, organic garbage or other solid fuels containing volatile matters.

The device is characterized in that a semicoke outlet of the retort is connected with a solid heat carrier internal heating type retort (a solid heat tank for short), hot semicoke falls into a downstream solid heat tank from an upstream retort through a sealed delivery valve, the hot semicoke is subjected to dry distillation on solid fuel by isolating oxygen-containing gas in the solid heat tank to obtain dry distillation coal gas, the dry distillation coal gas and the coal gas obtained by dry distillation of the hot coal gas are merged and connected to a boiler through a pipeline, meanwhile, the dry distillation solid fuel in the solid heat tank forms new carbon-containing solid which is merged with the cooled hot semicoke and is discharged through the downstream sealed delivery valve, and the semicoke and the carbon-containing solid are sent to the boiler or semicoke to be collected with carbon-containing ash discharged from a gasification furnace and sent to the boiler, and are burnt out under the combustion supporting.

The channel of the semicoke outlet of the dry distillation tank or the semicoke outlet of the heat regenerator is connected with a water chilling evaporation tank, so that the temperature of the semicoke is reduced on one hand, and meanwhile, steam generated in the tank is connected into a gasification furnace for gasification.

A part of the semicoke produced by the dry distillation tank is fed into the gasification furnace to be used as gasification fuel; the other part of the discharged semicoke is sent to a boiler independently or together with carbon-containing ash discharged from the gasification furnace, or the semicoke is sent to a collecting site ash and sent to the boiler and burnt out under the combustion supporting of coal gas or coal.

The gasification furnace in the gasification device is of a two-section type fixed bed furnace type, hot coal gas pumped out from a high-temperature section below is connected to the dry distillation tank, and coal gas produced by the upper section of the gasification furnace and coal gas produced by the lower section of the gasification furnace through the dry distillation tank are respectively or simultaneously fed to the tar separation device.

The dry distillation tank and the heat regenerator in the gasification device are integrated, hot coal gas generated by the gasification furnace is accessed from the middle section of the integrated container, the front half section is equivalent to the dry distillation tank, the rear half section is equivalent to the heat regenerator, hot semicoke generated by dry distillation of the front half section falls to the rear half section to heat the coal gas, and the semicoke is cooled.

The coal gas produced by the gasification furnace is connected with a coal gas pumping pipe to a fuel inlet of a gas engine or a gas turbine from a pipeline between an outlet of the tar separating device and an inlet of the heat regenerator or from the pipeline at the outlet of the heat regenerator, and simultaneously, the coal gas pipe is also connected to a fuel inlet of the boiler at the pipeline section.

The exhaust gas of the gas engine or the gas turbine enters the waste heat boiler or the exhaust gas is directly sent to the smoke side of the boiler, and the steam generated by the waste heat of the exhaust gas and the steam generated by the heat of the combustion fuel of the boiler are used for driving the same turbine.

The gas engine or the gas turbine exhausts gas into the waste heat boiler, and steam produced by the waste heat boiler is connected into the coal-fired boiler to be heated continuously, so that the steam temperature is further increased, and the steam turbine with higher parameters is driven.

The gasification furnace is of a supercharged type, blast air of the gasification furnace is connected from an independent air compressor or from an air compressor outlet of a gas turbine, gas is connected with a gas pipe to a fuel interface of the gas turbine from a pipeline between an outlet of the tar separation device and an inlet of the heat regenerator or from a pipeline at an outlet of the heat regenerator, and meanwhile, the pipeline section is also connected with a gas pipe to an expansion turbine or a pressure reducing valve or a pore plate or other pressure reducing equipment and then connected to the boiler.

Advantageous effects

The utility model discloses combine coal gasification power generation, coal fired boiler electricity generation, tar production together, not only the generating efficiency is high, can also the peak shaving, can also produce the tar of high added value in addition to thermal power plant's economic benefits has been improved.

Drawings

Fig. 1 a polygeneration peak regulation power station system, it includes the gasifier, the dry distillation jar, tar separator, the steam turbine, and the boiler, the gasification fuel is solid class fuel, the gasification equipment who comprises gasifier and dry distillation jar is sent into to solid fuel, the gasifier has produced hot coal gas through the blast air in the stove oxygen deficiency burning, connect hot coal gas to the dry distillation jar that is equipped with solid fuel, the dry distillation coal gas that contains tar has been produced, send to tar separator, separate out tar from the coal gas, tar separator or gasification equipment's for the coal gas export pipeline connect to the boiler, the field is removed to dry distillation jar exhaust semicoke simultaneously, or send to the gasifier or send to the boiler or converge the gasifier exhaust carbonaceous lime-ash of gasifier and send to the schematic diagram of boiler. Fig. 2 a polygeneration peak shaving power station system, the gasifier has produced hot coal gas through the blast air in the stove oxygen deficiency burning, connect hot coal gas to the retort that is equipped with solid fuel, produced the dry distillation coal gas that contains tar, send to tar separator, separate out tar in the coal gas, tar separator or gasification equipment's coal gas outlet pipeline both connects the boiler and converges and advance the retort with gasifier export hot coal gas, the place is removed to the semicoke of dry distillation jar exhaust simultaneously, or send to the gasifier or send to the boiler or converge the gasifier exhaust carbonaceous lime-ash and send to the schematic diagram of boiler.

Fig. 3 the utility model discloses a many coproduction peak shaving power station system, retort semicoke export is equipped with the regenerator, tar separator's coal gas outlet connects to the regenerator entry earlier, through with the semicoke heat exchange, connects to the boiler from the regenerator export with the gas pipe again, or converges the gasifier export hot gas and advances the retort, and the exhaust semicoke of retort goes through the regenerator simultaneously and collects the place, or send to the gasifier or send to the boiler or converge the gasifier exhaust carbonaceous lime-ash and send to the schematic diagram of boiler with the gasifier.

Fig. 4 the utility model discloses a many coproduction peak shaving power station system, the regenerator is equipped with in retort semicoke export, tar separator's coal gas export connects to the regenerator entry earlier, through with the semicoke heat exchange, the coal gas with the regenerator export converges the gasifier export hot gas and advances the retort again, or both connect the boiler and converge gasifier export hot gas and advance the retort, the semicoke of retort discharge goes to collect the place through the regenerator simultaneously, or send to the gasifier or send to the boiler or converge the gasifier exhaust carbonaceous lime-ash and send to the schematic diagram of boiler.

Fig. 5 the utility model discloses a many coproduction peak shaving power station system, retort semicoke export is equipped with the regenerator, tar separator's coal gas outlet connects to the regenerator entry earlier, through with the semicoke heat exchange, partial coal gas enters the boiler another part through the regenerator and directly converges and enter the retort with gasifier export hot gas, the semicoke that retort discharged goes through the regenerator simultaneously and collects the place, or send to the gasifier or send to the boiler or converge the gasifier exhaust carbonaceous lime-ash and send to the schematic diagram of boiler.

FIG. 6 a polygeneration peak regulation power plant system, its dry distillation jar semicoke export is equipped with the regenerator, tar separator's coal gas outlet connects to the regenerator entry earlier, through with the semicoke heat exchange, connect to the boiler from the regenerator export with the gas pipe again, regenerator gas high temperature end keeps UNICOM with dry distillation jar hot gas entry, dry distillation jar exhaust semicoke is sent to boiler or semicoke through the regenerator alone or compile gasifier exhaust carbonaceous lime-ash of gasifier and is removed to collect the place lime-ash and send to the boiler simultaneously, the burning-off's schematic diagram under coal gas or coal-fired combustion-supporting.

Fig. 7 the utility model discloses a many coproduction peak shaving power station system, the hot dry distillation jar (be referred to as the solid heat jar for short) of solid heat carrier internal heating formula is connected to its dry distillation jar semicoke export, hot semicoke falls into the solid heat jar of low reaches from upper reaches dry distillation jar through sealed transfer valve, hot semicoke obtains the dry distillation coal gas through isolated oxygen-containing gas dry distillation solid fuel in the solid heat jar, and join with the coal gas that hot coal gas dry distillation distilled off and connect to the boiler with the pipeline, the solid fuel of being dry distilled in the solid heat jar has formed new carbonaceous solid and has been converged with the hot semicoke of refrigerated and discharge through the sealed transfer valve of low reaches simultaneously, these semicokes and carbonaceous solid alone or the carbonaceous solid that converges that the gasifier is discharged send to the coal fired boiler or semicoke and go to collect the lime-ash site and send to the boiler, burn out under coal.

FIG. 8 the utility model shows a polygeneration peak shaving power station system, the channel of the semicoke export of its retort or the semicoke export of regenerator has connect the water chilling evaporating pot, reduces the semicoke temperature on the one hand from this, the steam that produces in the jar simultaneously inserts the schematic diagram that the gasifier was used for gasification.

FIG. 9 illustrates a polygeneration peak shaving power plant system in which the retort produces semicoke and a portion of the retort is used as gasification fuel; the other part of the discharged semicoke is sent to a boiler independently or together with carbon-containing ash discharged from a gasification furnace, or the semicoke is sent to a boiler for collecting site ash and then is burnt out under the combustion supporting of coal gas or coal.

Fig. 10 shows a poly-generation peak shaving power station system, in which the gasification furnace is a two-stage fixed bed furnace type, the hot gas extracted from the lower high-temperature section is connected to the retort, and the upper coal gas and the lower coal gas produced by the gasification furnace through the retort are respectively or both fed to the tar separation device.

Fig. 11 the utility model discloses a many coproduction peak shaving power station system, dry distillation jar and regenerator among its gasification equipment make a whole, and the hot coal gas that the gasifier produced inserts from this whole container middle section, and first half is equivalent to the dry distillation jar, and latter half is equivalent to the regenerator, and first half dry distillation produces hot semicoke and falls to latter half heating coal gas, the cooled schematic diagram of semicoke self.

Fig. 12 the present invention shows a poly-generation peak shaving power station system, wherein the gas produced by the gasification furnace is connected to the gas inlet of the gas engine or the gas turbine from the pipeline between the outlet of the tar separator and the inlet of the heat regenerator or from the pipeline of the outlet of the heat regenerator, and the gas inlet of the boiler is connected to the gas pipe at the above pipeline.

Fig. 9 the utility model discloses a polygeneration peak shaving power plant system, its gas engine or gas turbine exhaust enter exhaust-heat boiler or exhaust directly send into boiler flue gas side, utilize the steam that produces of exhaust waste heat and the steam that produces of the heat of boiler combustion fuel drive the same steam turbine's schematic diagram.

Fig. 13 the utility model discloses a polygeneration peak shaving power plant system, its gas engine or gas turbine exhaust enter exhaust-heat boiler, and the steam of exhaust-heat boiler output inserts coal fired boiler again and continues to heat and further improve steam temperature, drives the schematic diagram of the steam turbine of higher parameter.

Fig. 14 the utility model shows a many cogeneration peak shaving power station system, its gasifier is the pressure boost type, the blast air of gasifier inserts from independent compressor access or inserts from gas turbine's compressor export, coal gas has connect gas pipe to gas turbine fuel interface from tar separator export to the pipeline between the regenerator entry or from the pipeline of regenerator export, connect the schematic diagram of gas pipe to expansion turbine or relief pressure valve or orifice plate or other pressure relief devices back to the boiler in above-mentioned pipeline section still connect simultaneously.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Note that:

the 'dry distillation tank' refers to a gas heat carrier internal heating type dry distillation tank, and is a container for generating coal gas by dry distillation of solid fuel by using hot gas;

the 'solid heat tank' refers to a solid heat carrier internal heating type dry distillation tank, which is a container for generating coal gas by dry distillation of solid fuel by using hot solids;

"sealed transfer valve" refers to a combination valve capable of transferring solids to block the flow of gas, typically a rotary seal valve.

A polygeneration peak shaving power plant system as described in figure 1:

the utility model provides a poly-generation peak shaving power station system, it includes gasifier 12, tar separator 9, retort 15, steam turbine 1, and boiler 2, the gasification fuel is solid fuel, solid fuel is sent into the gasification equipment who comprises gasifier 12 and retort 15, gasifier 12 produces hot coal gas through the interior oxygen deficiency burning of blast furnace, connect hot coal gas to retort 15 that is equipped with solid fuel, produced the retort coal gas that contains tar, send to tar separator 9 and separate out tar, draw coal gas on the pipeline behind the export of tar separator 9 and connect to boiler 2, the semicoke that retort 15 discharged goes to collect place 11 simultaneously, or send to gasifier 12 or send to boiler 2 or converge the carbonaceous lime-ash that gasifier 12 discharged sends to boiler 2, utilize above-mentioned coal gas pipe that connects to boiler 2 to add the gas jet combustion-supporting, so that the carbon residue is burnt better, in addition, a portion of the char may be bypassed to the collection site 16 as clean solid fuel for other uses, if desired.

As shown in fig. 2, the coal gas at the outlet of the retort 15 is connected with the boiler 2 and is converged with the hot coal gas of the gasification furnace 12 to enter the retort 15:

the utility model provides a many coproduction peak shaving power station system, it includes gasifier 12, tar separator 9, retort 15, steam turbine 1, and boiler 2, the gasification fuel is solid fuel, solid fuel sends into the gasification equipment who comprises gasifier 12 and retort 15, gasifier 12 produces hot coal gas through the interior oxygen deficiency burning of blast furnace, connect hot coal gas to retort 15 that is equipped with solid fuel, produced the retort coal gas that contains tar, send to tar separator 9 and separate out tar, tar separator 9 or gasification equipment's coal gas outlet pipeline both connect boiler 2 and converge gasifier 12 export hot coal gas and enter retort 15, the semicoke that retort 15 discharged goes to collect place 11 simultaneously, or send to gasifier 12 or send to boiler 2 or converge gasifier 12 exhaust carbonaceous lime-ash and send to boiler 2, utilize the above-mentioned gas pipe that connects to boiler 2 and add the coal-spraying gas to help to burn, so as to better burn off the residual carbon and, if desired, to bypass a portion of the char to the collection site 16 for use as clean solid fuel for other purposes.

As shown in fig. 3, a regenerator 3 is arranged at a semicoke outlet of the retort 15, and coal gas is preheated and sent to a boiler 2:

the utility model provides a many coproduction peak shaving power station system, regenerator 3 is equipped with in the 15 semicoke export of its dry distillation jar, the coal gas export of tar separator 9 connects to 3 coal gas entrys of regenerator earlier, absorb the semicoke waste heat through the heat exchange, send into boiler 2 again, the 2 coal gas inlet temperature of boiler has been improved, 15 exhaust semicoke of dry distillation jar remove collection place 11 simultaneously, or send to gasifier 12 or send to boiler 2 or converge with gasifier 12 exhaust carbonaceous lime-ash and send to boiler 2, utilize the aforesaid to connect to the gas pipe of boiler 2 and add the combustion-supporting coal gas that spouts, so that burn out the carbon residue better, can also send collection place 16 with partial semicoke bypass when needing in addition, as clean solid fuel for other uses.

As shown in fig. 4, a regenerator 3 is installed at a semicoke outlet of the retort 15, and the coal gas is preheated and is sent to a boiler 2 and is converged with the coal gas of a gasification furnace 12 to enter the retort 15:

the utility model provides a many coproduction peak shaving power station system, regenerator 3 is equipped with in 15 semicoke exports of its dry distillation jar, the coal gas export of tar separator 9 connects to 3 coal gas entrys of regenerator earlier, the coal gas of 3 exports of regenerator converges gasifier 12 export hot coal gas and advances retort 15, or both connect boiler 2 and converge gasifier 12 export hot coal gas and advance retort 15, the waste heat of dry distillation semicoke has been retrieved like this, 15 exhaust semicoke of dry distillation jar goes to collect place 11 simultaneously, or send to gasifier 12 or send to boiler 2 or converge gasifier 12 exhaust carbon-containing cinder to boiler 2, utilize the above-mentioned gas pipe that connects to boiler 2 to add the gas jet combustion-supporting, so that burn the carbon residue better, in addition can also send partial semicoke bypass to collect place 16, as clean solid fuel for other uses.

As shown in fig. 5, the semicoke outlet of the retort 15 is provided with a heat regenerator 3, part of the coal gas is preheated and sent to the boiler 2, and part of the coal gas is converged with the coal gas of the gasification furnace 12 and enters the retort 15:

the utility model provides a many coproduction peak shaving power station system, its 15 semicoke exports of dry distillation jar are equipped with regenerator 3, the coal gas export of tar separator 9 connects to 3 coal gas inlets of regenerator earlier, absorb the semicoke waste heat through the heat exchange, part coal gas advances boiler 2 another part of boiler through regenerator 3 and directly converges and advance dry distillation pot 15 with gasifier 12 export hot gas, 15 exhaust semicoke dry distillation of while jar goes to collect place 11, or send to gasifier 12 or send to boiler 2 or converge gasifier 12 exhaust carbonaceous lime-ash and send to boiler 2, utilize the aforesaid to connect to boiler 2's gas pipe and add the combustion-supporting of gas that spouts, so that burn out the carbon residue better, can also send partial semicoke bypass to collect place 16 when needing in addition, as clean solid fuel for other uses.

As shown in fig. 6, the semi-coke outlet of the retort is connected with a solid heat carrier internal heating type retort (solid heat tank for short):

the utility model provides a poly-generation peak shaving power station system, its dry distillation jar semicoke 15 export connects solid heat carrier internal heating formula dry distillation jar (for short solid heat jar 19), hot semicoke falls into solid heat jar 19 of low reaches from upper reaches dry distillation jar 15 through sealed delivery valve 18, because contain chlorine in some organic solid fuel (including waste plastics, waste rubber, organic rubbish etc.), react with oxygen-containing gas in the temperature range of dry distillation, can generate dioxin, for avoiding the dioxin to generate, it is necessary to install sealed delivery valve 18 additional at solid heat jar both ends, come keep apart the sneaking of upper and lower reaches gas, hot semicoke obtains coal gas dry distillation through keeping apart dry distillation oxygen-containing gas solid fuel in solid heat jar 19, and join with the coal gas that hot coal gas is done the distillation and connect to boiler 2 with the pipeline, the solid fuel of being dry distilled has formed new carbonaceous solid in solid jar 19 simultaneously and has together cooled hot semicoke and has discharged through sealed delivery valve 18 of low reaches, the semicoke and the carbon-containing solid are sent to the boiler 2 separately or together with carbon-containing ash slag discharged from the gasification furnace, and are burnt out under the combustion supporting of coal gas or coal.

As shown in fig. 7, a water chilling evaporating pot 17 is connected to the passage of the semicoke outlet of the retort 15 or the semicoke inlet or outlet of the regenerator 3:

the utility model provides a many coproduction peak shaving power station system, it has connect water chilling evaporating pot 17 on the semicoke export of its dry distillation jar 15 or the semicoke entry of regenerator 3 or the passageway of export, reduces the semicoke temperature on the one hand from this, and the steam that produces in the jar inserts the use of gasifier 12 confession gasification simultaneously, and the waste water that usable system gas produced usually of chilling water to both provide the required steam of system gas, handled waste water with lower cost again.

As shown in fig. 8, the semicoke produced by the retort 15 enters the gasification furnace 12, and the other part of the semicoke enters the boiler 2:

the utility model provides a poly-generation peak shaving power station system, wherein, semicoke produced by a dry distillation tank 15 and a part of an air inlet gasification furnace 12 are used as gasification fuel; the other part of the discharged semicoke is converged with the carbon-containing ash discharged from the gasification furnace 12 and is sent to the boiler 2 to be burnt out under the combustion supporting of coal gas or coal, or is converged with the carbon-containing ash discharged from the gasification furnace 12 through the heat regenerator 3 and is sent to the boiler 2 to be burnt out under the combustion supporting of coal gas or coal.

As shown in fig. 9, the gasification furnace 12 is of a two-stage type:

the utility model provides a many coproduction peak shaving power station system, two segmentation fixed bed gasifiers 12 are added to its solid fuel, oxygen deficiency burning produces hot coal gas in the blast furnace, the hot coal gas that generates in gasifier 12 falls into two strands, the strand continues to rise the coal gas that contains the tar in gasifier 12 internal output, be called upper segment coal gas, another strand of hot coal gas of taking out from gasifier 12 middle part calls hypomere coal gas, its exit linkage is equipped with the entry of retort 15 of solid fuel, the dry distillation goes out the tar and flows out from retort 15 coal gas outlet along with coal gas together, it connects to tar separator 9 together with the coal gas that contains tar to converge gasifier 12 upper segment coal gas and hypomere and sends into tar separator 9 respectively through coal gas that retort 15 produced, coal gas after the tar takes off is connected to the regenerator 3 that is equipped with the semicoke from export through circulating fan 6, on the coal gas pipeline between export of tar separator 9 to regenerator 3 entry or from regenerator 3 export The extracted coal gas is connected to a boiler 2 for combustion supporting, the semicoke discharged from the dry distillation tank 15 is sent to a heat regenerator 3 to exchange heat with the coal gas, the semicoke discharged from the dry distillation tank 15 passes through the heat regenerator 3, and the carbon-containing ash and slag discharged from the heat regenerator 3 are sent to a gasification furnace 12 or the boiler 2 separately or together, or are mixed with the coal through a mixing field 11 to improve the heat value and the volatile matter and then sent to the boiler 2, or the coal gas pipe connected to the boiler 2 is utilized to add the coal gas for combustion supporting so as to better burn off the residual carbon, and in addition, part of the semicoke can be sent to a collection field 16 as clean solid fuel for other uses.

The retort 15 and the regenerator 3 are integrated as shown in fig. 10:

the utility model provides a poly-generation peak shaving power station system, solid fuel adds gasifier 12, produce hot coal gas through the oxygen deficiency burning in the blast furnace, the dry distillation jar 15 that is equipped with solid fuel is connected to gasifier 12 coal gas outlet, the tar that the dry distillation goes out is connected to tar separator 9 along with coal gas from dry distillation jar 15 coal gas outlet together, coal gas after the tar removal is connected to the regenerator 3 that is equipped with the semicoke through circulating fan 6 from the export, on the gas conduit between tar separator 9 export to regenerator 3 entrances or draw coal gas from regenerator 3 export and connect to boiler 2 combustion-supporting, dry distillation jar 15 and regenerator 3 make into an organic whole, hot coal gas that gasifier 12 produced inserts from this whole container middle section, the first half is equivalent to dry distillation jar 15, the latter half is equivalent to regenerator 3, the semicoke that the first half dry distillation becomes falls into latter half back and forth hot coal gas, reduce coal gas temperature through heat exchange semicoke and rise, thereby not only recovering the waste heat, but also increasing the dry distillation gas quantity.

As shown in fig. 11, an air extraction pipeline is connected to the pipeline between the outlet of the gas-tar separation device 9 and the inlet of the heat regenerator 3 and connected to the gas engine or the gas turbine 7:

the utility model provides a poly-generation peak shaving power station system, solid fuel adds gasifier 12, produce hot coal gas through the interior oxygen deficiency burning of blast furnace, gasifier 12 coal gas outlet connection is equipped with solid fuel's retort 15, the dry distillation tar flows out along with coal gas from retort 15 coal gas outlet together, through connecing to tar separator 9 and appearing tar, again through desulphurization unit 10, circulating fan 6 is connected to the regenerator 3 entry that is equipped with the semicoke, still there is the gas pipe to connect to boiler 2 fuel inlet in regenerator 3 export, make the coal gas that supplies boiler 2 utilize the waste heat of hot semicoke to preheat, in addition from the pipeline between gas tar separator 9 export to regenerator 3 entry, select to connect exhaust pipe to gas engine or gas turbine 7 fuel inlet at desulphurization of desulphurization unit 10 export, the little coal gas fuel of flow then lower cost, the pure sulphur of by-product that obtains simultaneously, the value is relatively high.

Fig. 12 shows that the gas engine or the gas turbine 7 exhausts into the exhaust-heat boiler 4 or exhausts directly into the flue gas side of the boiler 2, and the steam generated by the exhaust-heat and the steam generated by the heat of the combustion fuel of the boiler 2 drive the same turbine 1:

the utility model provides a many cogeneration peak shaving power station system, export 10 at desulphurization unit, coal gas after will desulfurizing connects to gas engine or gas turbine 7 fuel entry, generate electricity through gas engine or gas turbine 7, exhaust advances exhaust-heat boiler 4 or exhaust directly sends into 2 flue gas sides of boiler, through the same steam turbine 1 of steam drive that the heat of the produced steam of waste heat utilization and 2 burning fuel of boiler, the efficiency of the combined cycle of 1 messenger gas engine or gas turbine 7 of 2 driven large capacity steam turbines of usable boiler is higher like this.

Fig. 13 shows that the steam generated by the waste heat boiler 4 is connected to the coal-fired boiler 2 again to be heated and further increase the steam temperature, so as to drive the steam turbine 1 with higher parameters:

the utility model provides a many cogeneration peak shaving power station system exports at desulphurization unit 10, coal gas after will desulfurizing connects to gas engine or 7 fuel entries of gas turbine, generate electricity through gas engine or gas turbine 7, exhaust advances exhaust-heat boiler 4, the steam of its output inserts coal fired boiler 2 again and continues the heating and further improves steam temperature, this temperature does not receive the restriction of gas engine or 7 exhaust-heat of gas turbine, the steam of producing can be used to drive the steam turbine 1 of higher parameter, thereby make the efficiency of combined cycle higher.

Fig. 14 shows that the gasification furnace 12 is a pressurized type, and the blast air of the gasification furnace 12 is connected from the independent compressor 13 or from the outlet of the compressor exhaust cylinder of the gas turbine 7:

the utility model provides a many coproduction peak shaving power station system, solid fuel adds pressure boost gasifier 12, its blast air is inserted or is inserted from the compressor export of gas turbine 7 from independent compressor 13, oxygen deficiency burning produces hot coal gas in the blast furnace, gasifier 12 coal gas exit linkage is equipped with solid fuel's dry distillation jar 15, dry distillation tar flows along with coal gas together from dry distillation jar 15 coal gas export, through connecing to tar separator 9 and appearing tar, coal gas after the tar removal is followed tar separator 9 exports through desulphurization unit 10 and is divided two the tunnel, through coal gas booster 14 to gas turbine 7 fuel inlet all the way, another way connects circulating fan 6 to the pipeline section of the 3 exports of regenerator that are equipped with the semicoke in, coal gas after the intensification connects the boiler 2 combustion-supporting after the decompression equipment including expansion turbine 5 or relief pressure valve or orifice plate from regenerator 3 exports.

Claims (11)

1. The utility model provides a polygeneration peak regulation power station system, its includes gasifier, retort, tar separator, steam turbine, and boiler, and the gasification fuel is solid class fuel, and the gasification equipment who comprises gasifier and retort is sent into to solid fuel, and the gasifier has produced hot coal gas through the oxygen deficiency burning of blast air in the stove, its characterized in that: connecting the hot coal gas to a dry distillation tank filled with solid fuel, producing dry distillation coal gas containing tar, sending the dry distillation coal gas to a tar separation device, separating the tar from the coal gas, connecting a coal gas outlet of the tar separation device or a gasification device to a boiler by a pipeline, or connecting the coal gas outlet of the tar separation device or the gasification device to the boiler and converging the hot coal gas at an outlet of a gasification furnace to enter the dry distillation tank, and simultaneously sending the semicoke discharged from the dry distillation tank to a collection site, or sending the semicoke to the gasification furnace or sending the semicoke to the boiler or converging carbon-containing ash slag discharged from; or a regenerator is arranged at the semicoke outlet of the retort, a coal gas outlet of the tar separation device is firstly connected to the inlet of the regenerator, exchanges heat with the semicoke, and is connected to the boiler through a coal gas pipe from the outlet of the regenerator, or converges into hot coal gas at the outlet of the gasification furnace to enter the retort, or part of the coal gas enters the boiler through the regenerator and is directly converged with the hot coal gas at the outlet of the gasification furnace to enter the retort, or is connected with the boiler and converged with the hot coal gas at the outlet of the gasification furnace to enter the retort, and the semicoke discharged from the retort is sent to a collection site through the regenerator, or is sent to the gasification furnace or is sent to the boiler or converged with carbon-containing ash discharged from.

2. A polygeneration peak shaving power plant system according to claim 1, characterized in that: the solid fuel used by the gasification device is bituminous coal, lignite, peat, semicoke, petroleum coke, straw, biomass, waste rubber, waste plastic, organic garbage or any solid fuel containing volatile matters.

3. A polygeneration peak shaving power plant system according to claim 1, characterized in that: the semicoke outlet of the retort is connected with a heat-fixing tank, hot semicoke falls into a downstream heat-fixing tank from an upstream retort through a sealed conveying valve, the hot semicoke is used for carbonizing solid fuel in the heat-fixing tank by isolating oxygen-containing gas to obtain carbonized coal gas, the carbonized coal gas is combined with the coal gas dried by the hot coal gas and is connected to a boiler through a pipeline, meanwhile, the carbonized solid fuel in the heat-fixing tank forms new carbon-containing solid which is combined with the cooled hot semicoke and is discharged through the downstream sealed conveying valve, and the semicoke and the carbon-containing solid are separately or combined with carbon-containing ash slag discharged from a gasification furnace to be sent to the boiler or semicoke to be collected to the site ash slag to be sent to the boiler, and are burnt out under the combustion.

4. A polygeneration peak shaving power plant system according to claim 1, characterized in that: the channel of the semicoke outlet of the dry distillation tank or the semicoke outlet of the heat regenerator is connected with a water chilling evaporation tank, so that the temperature of the semicoke is reduced on one hand, and meanwhile, steam generated in the tank is connected into a gasification furnace for gasification.

5. A polygeneration peak shaving power plant system according to claim 1, characterized in that: a part of the semicoke produced by the dry distillation tank is fed into the gasification furnace to be used as gasification fuel; the other part of the discharged semicoke is sent to a boiler independently or together with carbon-containing ash discharged from the gasification furnace, or the semicoke is sent to a collecting site ash and sent to the boiler and burnt out under the combustion supporting of coal gas or coal.

6. A polygeneration peak shaving power plant system according to claim 1, characterized in that: the gasification furnace in the gasification device is of a two-section type fixed bed furnace type, hot coal gas pumped out from a high-temperature section below is connected to the dry distillation tank, and coal gas produced by the upper section of the gasification furnace and coal gas produced by the lower section of the gasification furnace through the dry distillation tank are respectively or simultaneously fed to the tar separation device.

7. A polygeneration peak shaving power plant system according to claim 1, characterized in that: the dry distillation tank and the heat regenerator in the gasification device are integrated, hot coal gas generated by the gasification furnace is accessed from the middle section of the integrated container, the front half section is equivalent to the dry distillation tank, the rear half section is equivalent to the heat regenerator, hot semicoke generated by dry distillation of the front half section falls to the rear half section to heat the coal gas, and the semicoke is cooled.

8. A polygeneration peak shaving power plant system according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that: the coal gas produced by the gasification furnace is connected with a coal gas pumping pipe to a fuel inlet of a gas engine or a gas turbine from a pipeline between an outlet of the tar separating device and an inlet of the heat regenerator or from the pipeline at the outlet of the heat regenerator, and meanwhile, a coal gas pipe is also connected to a fuel inlet of a boiler at the pipeline section connected to the gas turbine.

9. A polygeneration peak shaving power plant system in accordance with claim 8, characterized by: the exhaust gas of the gas engine or the gas turbine enters the waste heat boiler or the exhaust gas is directly sent to the smoke side of the boiler, and the steam generated by the waste heat of the exhaust gas and the steam generated by the heat of the combustion fuel of the boiler are used for driving the same turbine.

10. A polygeneration peak shaving power plant system in accordance with claim 8, characterized by: the gas engine or the gas turbine exhausts gas into the waste heat boiler, and steam produced by the waste heat boiler is connected into the coal-fired boiler to be heated continuously, so that the steam temperature is further increased, and the steam turbine with higher parameters is driven.

11. A polygeneration peak shaving power plant system in accordance with claim 8, characterized by: the gasification furnace is of a supercharged type, blast air of the gasification furnace is connected from an independent air compressor or from an air compressor outlet of a gas turbine, gas is connected with a gas pipe to a fuel interface of the gas turbine from a pipeline between an outlet of the tar separation device and an inlet of the heat regenerator or from a pipeline at an outlet of the heat regenerator, and meanwhile, the pipeline section is also connected with a gas pipe to an expansion turbine or a pressure reducing valve or a pore plate or pressure reducing equipment and then connected to the boiler.

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