CN103940131A - Efficient two-stage heat exchange and two-stage power generation system of high-temperature plasma gasification synthesis gas - Google Patents
Efficient two-stage heat exchange and two-stage power generation system of high-temperature plasma gasification synthesis gas Download PDFInfo
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 42
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 42
- 238000009272 plasma gasification Methods 0.000 title claims abstract description 13
- 238000010248 power generation Methods 0.000 title abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 157
- 239000002912 waste gas Substances 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 25
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- 239000004071 soot Substances 0.000 claims description 16
- 230000007797 corrosion Effects 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 6
- 238000002309 gasification Methods 0.000 claims description 6
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- 230000008901 benefit Effects 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 13
- 238000004939 coking Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
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- 238000000746 purification Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
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- 241000283074 Equus asinus Species 0.000 description 1
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- 238000007599 discharging Methods 0.000 description 1
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- Y02T10/12—Improving ICE efficiencies
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The invention relates to the technical field of waste disposal, in particular to a heat exchange and power generation system of high-temperature tail gas. The efficient two-stage heat exchange and two-stage power generation system of high-temperature plasma gasification synthesis gas comprises a two-stage heat exchange boiler, wherein a high-temperature heat exchange channel and a medium-temperature heat exchange channel are arranged in the two-stage heat exchange boiler. A gas inlet of the high-temperature heat exchange channel is connected with a synthesis gas outlet of a high-temperature plasma reaction kettle, and a gas outlet of the high-temperature heat exchange channel is connected with a gas-powered generator through a combustible gas delivery pipeline. A gas inlet of the medium-temperature heat exchange channel is connected with a waste gas outlet of the gas-powered generator, and a gas outlet of the medium-temperature heat exchange channel is connected with an external tail gas disposal device. A clean steam outlet of the two-stage heat exchange boiler is connected with a steam turbine generator. Because the technical scheme is adopted, the two-stage heat exchange function and the two-stage power generation function are achieved, and the thermoelectric conversion efficiency and the benefit of the waste disposal industry are multiplied; comprehensive energy consumption is greatly reduced, and sustainable development of the industry is supported; emission of harmful gas is greatly reduced, and thus the human living environment is protected.
Description
Technical field
The present invention relates to Waste Disposal Technology field, be specifically related to a kind of heat exchange and electricity generation system of utilizing high-temperature synthesis gas.
Background technology
In the high-temperature tail gas producing in burning process after tradition offal treatment, contain a large amount of harmful substances, directly discharge meeting atmosphere pollution and environment; Carry out discharging again after purified treatment, can increase the input cost of equipment and resource, bring added burden to offal treatment industry.
The generation of high-temperature plasma body technique and development, make offal treatment process more thorough, eliminated the generation of a large amount of harmful substances, the synthesis gas producing is with a large amount of heat energy, after can reclaiming, by gas turbine or gas electricity generator, building gasification power generation system generates electricity, traditional offal treatment industry of comparing only depends on and burn to produce the method that reclaims the energy after heat energy by steam turbine power generation mode, and the thermoelectric conversion efficiency of gasification power generation system is higher.In the waste heat recovery process of tradition offal treatment industry, the major part in condensation process of the heat energy in steam is wasted; Various oxious components in tail gas cannot effectively be eliminated, and discharge process easily causes environmental pollution.But, there is not temporarily on the market new power generating system that traditional burning electricity generation and plasma (orifice) gas elelctrochemical power generation are combined, therefore for the recovery of the heat energy in offal treatment process potential excavation also.
Summary of the invention
The object of the invention is to, a kind of efficient twin-stage heat exchange, twin-stage electricity generation system of high-temperature plasma gasification synthesis gas is provided, solve above technical problem.
Technical problem solved by the invention can realize by the following technical solutions:
The efficient twin-stage heat exchange of high-temperature plasma gasification synthesis gas, twin-stage electricity generation system, it is characterized in that, comprise a twin-stage heat exchange boiler, described twin-stage heat exchange boiler is one to be provided with two independently heat exchange boilers of heat exchanger channels, described two independent heat exchanger channels are high temperature heat exchanger channels and middle temperature heat exchanger channels, the air inlet of described high temperature heat exchanger channels connects the synthesis gas delivery outlet of high-temperature plasma reactor, the gas outlet of described high temperature heat exchanger channels connects combustible gas conveyance conduit, the high-temperature synthesis gas that described high-temperature plasma reactor produces is cooling through described high temperature heat exchanger channels, to complete first order heat exchange, then generate the flammable synthesis gas of low temperature low heat value, described combustible gas conveyance conduit connects a gas electricity generator, for the fuel using the flammable synthesis gas of described low temperature low heat value as described gas electricity generator, carry out thermoelectricity conversion, to complete first order generating,
The waste gas outlet of described gas electricity generator connects the air inlet of described middle temperature heat exchanger channels, the gas outlet of described middle temperature heat exchanger channels connects external exhaust gas treating apparatus, the middle temperature tail gas producing in described gas electricity generator running carries out waste heat recovery through in the process of described middle temperature passage, to complete second level heat exchange, the clean steam (vapor) outlet of described twin-stage heat exchange boiler connects a steam turbine generator, the clean steam producing while utilizing first order heat exchange and second level heat exchange generates electricity, to complete second level generating.
The present invention is by arranging the twin-stage heat exchange boiler of built-in high temperature heat exchanger channels and middle temperature heat exchanger channels, be equipped with gas electricity generator and steam turbine generator, built the mode of operation of twin-stage heat exchange and twin-stage generating, synthesis gas resource and its heat energy having that high-temperature plasma reactor is produced in danger waste disposal process fully reclaim, combine the advantage of traditional burning electricity generation mode and plasma gasification generation mode, make conversion efficiency of thermoelectric obtain effective raising, maximize and reclaimed synthesis gas resource and heat energy.
Described twin-stage heat exchange boiler comprises boiler body, in described boiler body, be provided with vapor can, low middle pressure pipe, described high temperature heat exchanger channels and described middle temperature heat exchanger channels, the water inlet end of described low middle pressure pipe connects a water preheater, the water inlet end of described water preheater connects external boiler water water supply line, the outlet side of described vapor can connects the inlet end of a steam superheater, and the outlet side of described steam superheater connects described steam turbine generator;
In described high temperature heat exchanger channels, be provided with temperature end heat exchanger, the two ends of described temperature end heat exchanger connect respectively described vapor can and described low middle pressure pipe;
In described middle temperature heat exchanger channels, be provided with middle temperature end heat exchanger, the two ends of described middle temperature end heat exchanger connect respectively described vapor can and described low middle pressure pipe.
The present invention is by arranging single vapor can structure, reduced that the steam producing after various heat exchange channel for heat exchange has different pressures and the risk brought.In work, the middle steam in the high pressure steam in temperature end heat exchanger and middle temperature end heat exchanger is undertaken carrying after pressure balance by this middle gas storage space of vapor can, guarantees the security of atmosphere storage and transport process.
In described high temperature heat exchanger channels, along gas communication direction, be provided with a plurality of described temperature end heat exchangers, the two ends of arbitrary described temperature end heat exchanger connect described vapor can and described low middle pressure pipe with removably respectively.
In described middle temperature heat exchanger channels, along gas communication direction, be provided with a plurality of described middle temperature end heat exchangers, the two ends of arbitrary described middle temperature end heat exchanger connect described vapor can and described low middle pressure pipe with removably respectively.
Heat exchanger in the present invention adopts modularized design, make the simple easy operating of installation and removal work, reduced maintenance difficulties, the structure that removably connects makes each heat exchanger become the unit that works alone, when single heat exchanger damages or overhauls, can not have influence on other heat exchangers or boiler body, only need be to placing under repair, change after this heat exchanger dismounting or the maintenance of other modes, in process, boiler still can resume operation.
Arbitrary described temperature end heat exchanger is after pencil is arranged and is formed by a plurality of heat exchanger tubes, to strengthen equipment exchange capability of heat;
Described middle temperature end heat exchanger adopts the structure identical with described temperature end heat exchanger.
Described steam superheater is arranged at the air inlet place of described high temperature heat exchanger channels, by arranging after steam superheater is further heated to be superheated steam by the clean steam in vapor can, is transported to steam turbine generator, promotes its generating, improves heat utilization rate.
Described steam superheater is after pencil is arranged and is formed by a plurality of heat exchanger tubes, to strengthen exchange capability of heat.
The steam superheater that described steam superheater adopts a corrosion-resistant high-alloy steel to make.Because steam superheater is arranged at the air inlet place of high temperature heat exchanger channels, in whole heat transfer process foremost, the temperature of the synthesis gas touching is the highest, and owing to not passing through the cooling and fouling of heat exchanger channels, harmful substance contents in synthesis gas is also the highest, is therefore the most easily corroded and fire damage, and adopting corrosion-resistant high-alloy steel is the material of preparing of steam superheater, contribute to improve resistance to corrosion and the intensity of superheater, extension device service life.
In described water preheater, corresponding described high temperature heat exchanger channels and described middle temperature heat exchanger channels are respectively equipped with high temperature side preheating channel and middle temperature side preheating channel, are convenient to utilize the synthesis gas after heat exchange cooling to carry out preheating to boiler water;
The inlet end of described high temperature side preheating channel connects the outlet side of described high temperature heat exchanger channels, and the outlet side of described high temperature side preheating channel connects described combustible gas conveyance conduit;
The inlet end of described middle temperature side preheating channel connects the outlet side of described middle temperature heat exchanger channels, and the outlet side of described middle temperature side preheating channel connects described external exhaust gas treating apparatus.
The connecting line of described water preheater and described low middle pressure pipe is provided with water booster pump, and anti-water-stop body adverse current is also convenient to that accelerating fluid moves and to vapor can certain pressure, is improved steam transfer efficiency.
Described combustible gas conveyance conduit is provided with a pneumatic filter, in described pneumatic filter, be provided with high temperature micropore ceramic filter element, by pneumatic filter is set, the low temperature low heat value fuel gas of flowing through is carried out to filtration, purification, reduce the impurity content in gas, high temperature micropore ceramic filter element is set in pneumatic filter and contributes to improve the quality of filtering and purifying.
Described combustible gas conveyance conduit is provided with a gas condenser, described gas condenser is arranged between described pneumatic filter and described gas electricity generator, by gas condenser being set by the further tar that freeze-outs of lowering the temperature of the low temperature low heat value fuel gas of flowing through, to reduce the fouling on gas electricity generator.
Described combustible gas conveyance conduit is provided with a gas boosting pump, and described gas boosting pump is arranged in the pipeline between described gas condenser and described gas electricity generator.
Described combustible gas conveyance conduit is provided with an outside combustible gas input interface, and described outside combustible gas input interface is arranged between described gas condenser and described gas boosting pump.
The tail gas outlet of described steam turbine generator connects a steam-condensation tower, and recycling after described steam-condensation tower reclaims for boiler water, reduces water resource loss.
Twin-stage heat exchange of the present invention, the operation principle of twin-stage generating mode of operation is: from the high-temperature synthesis gas of the high-temperature plasma reactor steam superheater of successively flowing through, high temperature heat exchanger channels and water preheater, completed first order heat exchange, in process, high-temperature synthesis gas first contacts concurrent heat-dissipating exchange with steam superheater, enter again boiler body and a plurality of temperature end heat exchanger carries out heat exchange, by flowing through, its inner boiler water converts high-temperature steam to, through heat exchanger heat exchange cooled high-temperature synthesis gas, when through water preheater, the boiler water of flowing through in it is carried out to preheating, after high-temperature synthesis gas after cooling becomes the flammable synthesis gas of low temperature low heat value again, by Pipeline transport, arrive gas electricity generator as fuel for power generation, carry out first order generating, the middle temperature tail gas that gas electricity generator produces successively flow through middle temperature heat exchanger channels and water preheater, completed second level heat exchange, in process, when temperature is held heat exchanger in middle temperature tail gas stream warp, make the boiler water in it transfer middle temperature steam to, self is by cooling down, and then boiler water is carried out to preheating while flowing through water preheater, after self further cooling down, becoming low temperature exhaust gas is output to external exhaust gas treating apparatus and carries out purified treatment, after flowing into vapor can in high-temperature steam and middle temperature vapor collection, carried out pressure balance, then in the steam superheater process of flowing through, be again heated, thoroughly after dehumidifying, be transported to steam turbine generator and carry out second level generating.
In described boiler body, be provided with the grey station that blows of the steam scale removal that utilizes in vapor can, describedly blow grey station and be provided with a convolution retractable soot blower, described convolution retractable soot blower connects described vapor can, to utilize the high pressure cleaning steam that vapor can provides to carry out deashing scale removal to the heating surface in boiler body.In boiler running process, the easy ash deposit and slag buildup of the heating surface of equipment and coking, reduce the thermal conductivity factor of heating surface, and heat exchanger effectiveness is reduced; After fouling, easily make heating surface produce high cold end corrosion, increase the explosion probability of heat exchanger components, reduce service life of equipment, affect operating efficiency.The fouling coking situation that soot blower can effectively improve equipment heating surface is set, improves the operating efficiency of heating surface.Because high steam derives from boiler itself, so the present invention is without extra outside air feed equipment and the source of the gas of increasing, and has saved the input cost of resource and equipment.
The both sides of arbitrary described temperature end heat exchanger are respectively equipped with described at least one blows grey station and supporting described convolution retractable soot blower.
The both sides of arbitrary described middle temperature end heat exchanger are respectively equipped with described at least one blows grey station and supporting described convolution retractable soot blower.
At least one side of described steam superheater is provided with described at least one blows grey station and supporting described convolution retractable soot blower.
Described vapor can is provided with a safety-valve for reducing pressure, getting rid of the danger while being convenient to vapor can pressure limit.
Described safety-valve preferably adopts a spring force adjustable safety valve door.
The heat exchanger tube that described heat exchanger tube adopts corrosion-resistant high-alloy steel to make, to strengthen resistance to corrosion and the mechanical strength of equipment, extension device service life.
Beneficial effect: owing to adopting technique scheme, the present invention has realized twin-stage heat exchange and twin-stage electricity generate function, has significantly improved thermoelectric conversion efficiency and the benefit of Waste disposal industry; Greatly save comprehensive energy consumption, supported the sustainable development of industry; Greatly reduce the discharge of pernicious gas, protected environment for human survival.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is partial structurtes schematic diagram of the present invention.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
With reference to Fig. 1, Fig. 2, efficient twin-stage heat exchange, the twin-stage electricity generation system of high-temperature plasma gasification synthesis gas, comprise that inside is provided with the twin-stage heat exchange boiler of high temperature heat exchanger channels and middle temperature heat exchanger channels.Twin-stage heat exchange boiler comprises boiler body, inside establish vapor can 1, low middle pressure pipe 2, the water inlet end of low middle pressure pipe 2 connects water preheater 3, in connecting line, be provided with water booster pump 4, the water inlet end of water preheater 3 connects external boiler water water supply line, the outlet side of vapor can 1 connects the inlet end of steam superheater 5, and the outlet side of steam superheater 5 connects steam turbine generator 6.
In high temperature heat exchanger channels, along gas flow, be provided with a plurality of temperature end heat exchangers 7, the two ends of arbitrary temperature end heat exchanger 7 connect vapor can 1 and low middle pressure pipe 2 with removably respectively; In middle temperature heat exchanger channels, along gas flow, be provided with a plurality of middle temperature end heat exchangers, the two ends of arbitrary middle temperature end heat exchanger connect vapor can 1 and low middle pressure pipe 2 with removably respectively.The air inlet of high temperature heat exchanger channels connects the synthesis gas delivery outlet of high-temperature plasma reactor, and steam superheater 5 is arranged at the air inlet place of high temperature heat exchanger channels.The gas outlet of high temperature heat exchanger channels connects gas electricity generator 8 by combustible gas conveyance conduit, externally exports the flammable synthesis gas of cooled low temperature low heat value, to high-temperature synthesis gas is carried out to waste heat recovery, for generating.Combustible gas conveyance conduit is provided with pneumatic filter 9, is provided with high temperature micropore ceramic filter element in pneumatic filter 9, by the low temperature low heat value fuel gas that 9 pairs of pneumatic filters flow through is set, carries out filtration, purification, reduces impurity content in gas, improves gas combustion value.After pneumatic filter 9, be provided with gas condenser 15 to improve the depuration quality of combustion gas.Combustible gas conveyance conduit is provided with gas boosting pump 10, and gas boosting pump 10 is arranged in the pipeline between gas condenser 15 and gas electricity generator 8.Combustible gas conveyance conduit is provided with outside combustible gas input interface, and outside combustible gas input interface is arranged on the connecting line between gas condenser and gas boosting pump.The tail gas outlet of steam turbine generator 6 connects steam-condensation tower 11, and recycling after steam-condensation tower 11 reclaims for boiler water, reduces water resource loss.The air inlet of warm heat exchanger channels during the waste gas outlet of gas electricity generator 8 connects, the gas outlet of middle temperature heat exchanger channels connects external exhaust gas treating apparatus 12, and the low temperature exhaust gas of being convenient to after heat exchanging carries out purified treatment.Vapor can 1 is provided with the spring force adjustable safety valve door 14 for reducing pressure, getting rid of the danger while being convenient to vapor can 1 pressure limit.In boiler body, be provided with the grey station 13 that blows of the high steam scale removal that utilizes in vapor can, blow grey station 13 and be provided with a convolution retractable soot blower, convolution retractable soot blower connects vapor can 1, to utilize the high pressure cleaning steam that vapor can 1 provides to carry out deashing scale removal to the heating surface in boiler body.The both sides of arbitrary temperature end heat exchanger 7 and arbitrary middle temperature end heat exchanger are respectively equipped with at least one and blow grey station and supporting convolution retractable soot blower.At least one side of steam superheater 5 is provided with at least one and blows grey station and supporting convolution retractable soot blower.In heat exchange boiler running, the easy ash deposit and slag buildup of the heating surface of equipment and coking, reduce the thermal conductivity factor of heating surface, and heat exchanger effectiveness is reduced; After fouling, easily make heating surface produce high cold end corrosion, increase the explosion probability of heat exchanger components, reduce service life of equipment, affect operating efficiency.Utilize soot blower can effectively improve the fouling coking situation of equipment heating surface, improve the operating efficiency of heating surface.Because high steam derives from waste heat boiler itself, so the present invention is without extra outside air feed equipment and the source of the gas of increasing, and has saved the input cost of resource and equipment.Arbitrary temperature end heat exchanger 7 is after pencil is arranged and is formed by a plurality of heat exchanger tubes, and steam superheater 5 is after pencil is arranged and is formed by a plurality of heat exchanger tubes, to increase heating surface, strengthens equipment exchange capability of heat; Middle temperature end heat exchanger adopts the structure identical with temperature end heat exchanger.Heat exchanger tube adopts corrosion-resistant high-alloy steel to make, and steam superheater 5 adopts corrosion-resistant high-alloy steel to make, to strengthen corrosion resistance and the intensity of equipment, increases the service life of equipment.The interior corresponding high temperature heat exchanger channels of water preheater 3 and middle temperature heat exchanger channels are respectively equipped with high temperature side preheating channel and middle temperature side preheating channel, are convenient to utilize the synthesis gas after heat exchange cooling to carry out preheating to boiler water; The inlet end of high temperature side preheating channel connects the outlet side of high temperature heat exchanger channels, and the outlet side of high temperature side preheating channel connects combustible gas conveyance conduit; The outlet side of warm heat exchanger channels during the inlet end of middle temperature side preheating channel connects, the outlet side of middle temperature side preheating channel connects external exhaust gas treating apparatus 12.
The present invention is by arranging single vapor can structure, reduced that the steam producing after various heat exchange channel for heat exchange has different pressures and the risk brought.In work, middle temperature steam in high-temperature steam in temperature end heat exchanger and middle temperature end heat exchanger is undertaken carrying after pressure balance by this middle gas storage space of vapor can, guarantee the security of atmosphere storage and transport process, to a certain degree avoided the situation of the pressure limit that in traditional handicraft, single heat exchanger channels and single vapor can cause.Heat exchanger adopts modularized design, make the simple easy operating of installation and removal work, reduced maintenance difficulties, the structure that removably connects makes each heat exchanger become the unit that works alone, when single heat exchanger damages or overhauls, can not have influence on other heat exchangers or boiler body, only need be to placing under repair, change after this heat exchanger dismounting or the maintenance of other modes, in process, boiler still can resume operation.
The present invention has the mode of operation of twin-stage heat exchange, twin-stage generating: the high-temperature synthesis gas that comes from high-temperature plasma reactor is carried out first order heat exchange when through high temperature heat exchanger channels, in heat exchanging process, after cooling down, being changed into the flammable synthesis gas of low temperature low heat value is output to gas electricity generator and generates electricity for the first order, the product of first order heat transfer process is except the flammable synthesis gas of low temperature low heat value, absorb in addition the clean steam being transformed by boiler water after heat, clean steam is transported to steam turbine generator and carries out second level generating; The middle temperature synthesis gas that gas electricity generator generates in power generation process is input to middle temperature heat exchanger channels by waste gas outlet and carries out second level heat exchange, in heat exchanging process, after cooling down, being become low temperature exhaust gas is transported to external exhaust gas treating apparatus and carries out purified treatment, heat donkey boiler water in the heat transfer process of the second level is converted into clean steam, continues to participate in second level generating.By being set, high temperature heat exchanger channels and middle temperature heat exchanger channels built the mode of operation that twin-stage heat exchange, twin-stage generate electricity, greatly improved thermoelectric conversion rate, improve and improved the operating efficiency of whole residual neat recovering system, effectively realized tail gas recycle utilization and energy regeneration after trade waste is processed.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (10)
1. efficient twin-stage heat exchange, the twin-stage electricity generation system of high-temperature plasma gasification synthesis gas, it is characterized in that, comprise a twin-stage heat exchange boiler, described twin-stage heat exchange boiler is one to be provided with two independently heat exchange boilers of heat exchanger channels, described two independent heat exchanger channels are high temperature heat exchanger channels and middle temperature heat exchanger channels, the air inlet of described high temperature heat exchanger channels connects the synthesis gas delivery outlet of high-temperature plasma reactor, the gas outlet of described high temperature heat exchanger channels connects combustible gas conveyance conduit, and described combustible gas conveyance conduit connects a gas electricity generator;
The waste gas outlet of described gas electricity generator connects the air inlet of described middle temperature heat exchanger channels, the gas outlet of described middle temperature heat exchanger channels connects external exhaust gas treating apparatus, and the clean steam (vapor) outlet of described twin-stage heat exchange boiler connects a steam turbine generator that utilizes clean steam that twin-stage heat exchange boiler produces in heat transfer process to generate electricity.
2. the efficient twin-stage heat exchange of high-temperature plasma gasification synthesis gas according to claim 1, twin-stage electricity generation system, it is characterized in that, described twin-stage heat exchange boiler comprises boiler body, in described boiler body, be provided with vapor can, low middle pressure pipe, described high temperature heat exchanger channels and described middle temperature heat exchanger channels, the water inlet end of described low middle pressure pipe connects a water preheater, the water inlet end of described water preheater connects external boiler water water supply line, the outlet side of described vapor can connects the inlet end of a steam superheater, the outlet side of described steam superheater connects described steam turbine generator,
In described high temperature heat exchanger channels, be provided with temperature end heat exchanger, the two ends of described temperature end heat exchanger connect respectively described vapor can and described low middle pressure pipe;
In described middle temperature heat exchanger channels, be provided with middle temperature end heat exchanger, the two ends of described middle temperature end heat exchanger connect respectively described vapor can and described low middle pressure pipe.
3. efficient twin-stage heat exchange, the twin-stage electricity generation system of high-temperature plasma according to claim 2 gasification synthesis gas, it is characterized in that, in described high temperature heat exchanger channels, along gas communication direction, be provided with a plurality of described temperature end heat exchangers, the two ends of arbitrary described temperature end heat exchanger connect described vapor can and described low middle pressure pipe with removably respectively;
In described middle temperature heat exchanger channels, along gas communication direction, be provided with a plurality of described middle temperature end heat exchangers, the two ends of arbitrary described middle temperature end heat exchanger connect described vapor can and described low middle pressure pipe with removably respectively.
4. efficient twin-stage heat exchange, the twin-stage electricity generation system of high-temperature plasma gasification synthesis gas according to claim 2, is characterized in that, described steam superheater is arranged at the air inlet place of described high temperature heat exchanger channels;
Described steam superheater is after pencil is arranged and is formed by a plurality of heat exchanger tubes;
The steam superheater that described steam superheater adopts a corrosion-resistant high-alloy steel to make.
5. according to efficient twin-stage heat exchange, the twin-stage electricity generation system of the high-temperature plasma gasification synthesis gas described in claim 2,3 or 4, it is characterized in that, in described water preheater, corresponding described high temperature heat exchanger channels and described middle temperature heat exchanger channels are respectively equipped with high temperature side preheating channel and middle temperature side preheating channel;
The inlet end of described high temperature side preheating channel connects the outlet side of described high temperature heat exchanger channels, and the outlet side of described high temperature side preheating channel connects described combustible gas conveyance conduit;
The inlet end of described middle temperature side preheating channel connects the outlet side of described middle temperature heat exchanger channels, and the outlet side of described middle temperature side preheating channel connects described external exhaust gas treating apparatus.
6. efficient twin-stage heat exchange, the twin-stage electricity generation system of high-temperature plasma gasification synthesis gas according to claim 1, is characterized in that, described combustible gas conveyance conduit is provided with a pneumatic filter, is provided with high temperature micropore ceramic filter element in described pneumatic filter.
7. efficient twin-stage heat exchange, the twin-stage electricity generation system of high-temperature plasma according to claim 6 gasification synthesis gas, it is characterized in that, described combustible gas conveyance conduit is provided with one and is convenient to make further the freeze-out gas condenser of tar of cooling of the low temperature low heat value fuel gas of flowing through, and described gas condenser is arranged between described pneumatic filter and described gas electricity generator;
Described combustible gas conveyance conduit is provided with a gas boosting pump, and described gas boosting pump is arranged in the pipeline between described gas condenser and described gas electricity generator;
Described combustible gas conveyance conduit is provided with an outside combustible gas input interface, and described outside combustible gas input interface is arranged between described gas condenser and described gas boosting pump.
8. efficient twin-stage heat exchange, the twin-stage electricity generation system of high-temperature plasma gasification synthesis gas according to claim 1, is characterized in that, the tail gas outlet of described steam turbine generator connects a steam-condensation tower for recycling after boiler water recovery.
9. efficient twin-stage heat exchange, the twin-stage electricity generation system of high-temperature plasma according to claim 2 gasification synthesis gas, it is characterized in that, in described boiler body, be provided with the grey station that blows of the steam scale removal that utilizes in vapor can, describedly blow grey station and be provided with a convolution retractable soot blower, described convolution retractable soot blower connects described vapor can.
10. efficient twin-stage heat exchange, the twin-stage electricity generation system of high-temperature plasma according to claim 9 gasification synthesis gas, it is characterized in that, the both sides of arbitrary described temperature end heat exchanger are respectively equipped with described at least one blows grey station and supporting described convolution retractable soot blower;
The both sides of arbitrary described middle temperature end heat exchanger are respectively equipped with described at least one blows grey station and supporting described convolution retractable soot blower;
At least one side of described steam superheater is provided with described at least one blows grey station and supporting described convolution retractable soot blower.
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| CN109161402A (en) * | 2018-09-19 | 2019-01-08 | 天津大学 | Solid waste plasma gasification processing unit and method |
| CN114876641A (en) * | 2022-06-14 | 2022-08-09 | 西安热工研究院有限公司 | Gas turbine inlet air cooling system utilizing LNG gasification cold energy and working method thereof |
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