CN205744027U - Electricity and the system of tail flue gas waste heat preparation of dimethyl ether more than a kind of Thermal generation unit - Google Patents
Electricity and the system of tail flue gas waste heat preparation of dimethyl ether more than a kind of Thermal generation unit Download PDFInfo
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- CN205744027U CN205744027U CN201620385730.2U CN201620385730U CN205744027U CN 205744027 U CN205744027 U CN 205744027U CN 201620385730 U CN201620385730 U CN 201620385730U CN 205744027 U CN205744027 U CN 205744027U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
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Abstract
This utility model relates to electricity and the system of tail flue gas waste heat preparation of dimethyl ether more than a kind of Thermal generation unit.This system includes boiler, steam turbine and electromotor, boiler produces steam by Steam Turbine Driven electrical power generators, it is characterized in that, also include low-level (stack-gas) economizer, press water electrolysis bath, hydrogen dryer, hydrogen gas compressor, hydrogen heater, carbon dioxide capture device, carbon-dioxide gas compressor, carbon dioxide heater and DME synthesis device.This goods batch is reasonable, efficiency is high utilizes electricity/tail flue gas waste heat preparation of dimethyl ether more than Thermal generation unit.
Description
Technical field
This utility model relates to a kind of clean energy resource preparation system, electricity and the system of tail flue gas waste heat preparation of dimethyl ether more than a kind of Thermal generation unit.
Background technology
Thermal generation unit maximizes and high parameter is the main path reducing pollution that caused by coal burning on a large scale at present, the fired power generating unit of domestic operation is mainly the supercritical (main steam temperature 538 DEG C ~ 593 DEG C of 600MW, 1000MW level, main steam pressure 24 ~ 26MPa), ultra supercritical (main steam temperature >=600 DEG C, main steam pressure >=26MPa) Thermal generation unit, 700C ° of Thermal generation unit of external main steam temperature also will be gone into operation.But, some areas are due to water power in recent years, photovoltaic, the new forms of energy development such as wind-powered electricity generation, big heaped capacity, the operating load of high parameter Thermal generation unit is greatly reduced, have falls below less than the 50% of design load, unit installed capacity is substantial amounts of dump power than supply load redundancy, this some electrical power is defined as remaining electricity (Surplus Power, SP), ultra-supercritical coal-fired power generating units thermal efficiency when 50% design load runs can reduce by more than 9%, when each main and auxiliaries runs under away from design conditions, efficiency is greatly reduced, fault rate is substantially increased, it it is electricity power enterprise's difficult problem of needing solution badly.It addition, new forms of energy, the height of distributed energy penetrates into, makes Thermal generation unit face more complicated peak regulation requirement.
On market, the operation also effect on environment of gasoline car, diesel vehicle and natural gas vehicle that main flow uses is huge.The most efficiently and economically ensureing novel military equipment (such as new A IP(Air-independent propulsion) submarine) highly purified liquid hydrogen, the supply of liquid oxygen be also a difficult problem urgently to be resolved hurrily for our country.
Research worker is it has been acknowledged that methanol can directly be blended in gasoline, derivant dimethyl ether (the Dimethyl Ether of methanol, DME) can directly be blended in diesel oil, hydrogen can directly be blended in gas fuel and go increase engine efficiency and reduce discharge.
China Patent Publication No. " 104989519A " discloses " hydrogen gas generation unit ", it is characterized in that, including electromotor main body, described main body includes energy supplying system, can change system and control unit, described energy supplying system includes hydrogen feed unit and the fuel gas injection valve being attached thereto, described the system of changing can include air filter and the many groups sensor being attached thereto, described control unit is made up of ECU；Described sensor includes air inlet temperature/pressure sensor, cooling-water temperature sensor, crankshaft position sensor, oxygen sensor and phase detector composition.Above-mentioned patent disclosed that a kind of system utilizing hydrogen to generate electricity as the energy, be not disclosed to the guidance contrary with us.
Prior art there is not yet and utilize the remaining electricity/waste heat of large-scale high parameter Thermal generation unit to produce dimethyl ether raw material to solve the device of the scheme output cleaning low-carbon energy simultaneously of the operation at part load poor efficiency high cost of electricity power enterprise.
Utility model content
nullThe purpose of this utility model is to overcome above-mentioned deficiency present in prior art，And provide one to utilize Large Copacity、The remaining electricity of high parameter Thermal generation unit/waste heat electrolysis water or high-temperature water vapor (High Temperature Steam Electrolysis，HTSE) hydrogen is produced，And by hydrogenation of carbon dioxide catalytic reaction (Carbon Dioxide by Catalytic Hydrogenation with Hydrogen，CDCHH) system manufacturing dimethyl ether solves poor efficiency high cost problem during the operation at part load of electricity power enterprise's Thermal generation unit，And provide dimethyl ether etc. directly to blend natural gas、Gasoline car、Diesel vehicle fuel reduces pollutant emission and the carbon emission of region，Improve region air quality.
This utility model purpose is achieved through the following technical solutions:
Electricity and the system of tail flue gas waste heat preparation of dimethyl ether more than a kind of Thermal generation unit, including boiler, steam turbine and electromotor, boiler produces steam by Steam Turbine Driven electrical power generators, it is characterized in that, also include low-level (stack-gas) economizer, press water electrolysis bath, hydrogen dryer, hydrogen gas compressor, hydrogen heater, carbon dioxide capture device, carbon-dioxide gas compressor, carbon dioxide heater and DME synthesis device, described boiler tail flue gas is sequentially ingressed into low-level (stack-gas) economizer, discharge after carbon dioxide capture device, the carbon dioxide of trapping sequentially passes through carbon-dioxide gas compressor, carbon dioxide heater and DME synthesis device；Described low-level (stack-gas) economizer cut-in pressure water electrolyser, the hydrogen end that press water electrolytic tank electrolysis produces is sequentially ingressed into hydrogen dryer, hydrogen gas compressor, hydrogen heater and DME synthesis device.
As preferably, described hydrogen dryer, hydrogen heater and carbon dioxide heater are all by extracted steam from turbine heat supply.
As preferably, described press water electrolysis bath, hydrogen gas compressor, carbon-dioxide gas compressor, DME synthesis device are all by the remaining electricity power supply of electromotor.
As preferably, described carbon dioxide heater and hydrogen heater are all by the remaining electricity auxiliary heating of electromotor.
As preferably, the oxygen that described press water electrolysis bath produces is divided into two-way, and a road storage, another road is passed through boiler.
Compared with prior art, this product compared with the existing technology has the following advantages and effect
:
1, realize high parameter, Large Copacity Thermal generation unit in best operating point smooth working, improve unit efficiency, it is to avoid harmful effect when the frequent load change of unit and underrun；
2, the heat of high-temperature water vapour electrolytic product is reclaimed by waste-heat recovery device, it is achieved that the cascade utilization of the energy；
3, modularized design, the remaining electricity preparation of dimethyl ether fuel system module number put into operation can change in time with the change of network load, improves operational efficiency and motility, reduces installation difficulty and complexity simultaneously, reduce operational management complexity；
4, by combining in this utility model the system of remaining electricity/waste heat preparation of dimethyl ether fuel, what Thermal generation unit can tackle electrical network in time meets variation requirement.
5, one of raw material of dimethyl ether synthesis carbon dioxide by boiler tail flue gas through collecting carbonic anhydride, reduce the CO2 emission of Thermal generation unit；
6, the dimethyl ether fuel prepared is clean energy resource, is blended in diesel oil the carbon emission that can reduce automobile, has good social benefit.
7, dimethyl ether (Dimethyl Ether, DME) can directly be blended in diesel oil, and the efficiency improving Diesel engine reduces discharge.
8, achieve the liquid fuels such as the abundant coal resource hydrogen manufacturing of utilization China recoverable amount, methanol, dimethyl ether, be conducive to the energy of China to stabilize and supply safely and reliably, be conducive to the energy security of country.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, accompanying drawing in describing below apparently is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the system principle schematic diagram of the present embodiment.
Label declaration: boiler 1, steam turbine 2, electromotor 3, low-level (stack-gas) economizer 4, press water electrolysis bath 5, hydrogen dryer 6, hydrogen gas compressor 7, hydrogen heater 8, carbon dioxide capture device 9, carbon-dioxide gas compressor 10, carbon dioxide heater 11, methyl ether synthesizer 12.
Detailed description of the invention
Illustrate that this utility model, the following example are merely to illustrate the technical solution of the utility model below in conjunction with specific embodiment, do not limit protection domain of the present utility model.
Embodiment:
In the present embodiment, hydrogen manufacturing mode is water electrolysis hydrogen production, and major product is dimethyl ether.As Fig. 1 shows, the present embodiment is made up of Supercritical/Super-Supercritical Boilers 1, steam turbine 2, electromotor 3, low-level (stack-gas) economizer 4, press water electrolysis bath 5, hydrogen dryer 6, hydrogen heater 7, hydrogen gas compressor 8, carbon dioxide capture device/9, carbon-dioxide gas compressor 10, carbon dioxide heater 11, one-step method DME synthesis device 12.
After " low-level (stack-gas) economizer " in the present embodiment refers to be arranged in boiler air preheater, flue-gas temperature is reduced to about 100 DEG C, it is achieved the device that the fume afterheat degree of depth reclaims.General point two stage arrangement: before the first season is arranged in cleaner unit, before the second level is arranged in desulfurizing tower.Use low-level (stack-gas) economizer can improve generatine set heat efficiency, energy-conservation, water-saving result notable, meet the policy of country's " energy-saving and emission-reduction ", there is good development prospect and application and popularization value.
The hot water entrance press water electrolysis bath 5 that Supercritical/Super-Supercritical Boilers 1 tail flue gas produces 80 ~ 90 DEG C through low-level (stack-gas) economizer 4 waste heat recovery is electrolysed, electric tank cathode side outlet is the hydrogen of 3MPa, hydrogen is dried through hydrogen dryer 6, hydrogen gas compressor 7 pressurizes, one-step method DME synthesis device 12 is entered after hydrogen heater 8 heat temperature raising, trap through carbon dioxide capture device 9 with by Supercritical/Super-Supercritical Boilers 1 tail flue gas, carbon-dioxide gas compressor 10 compresses, the carbon dioxide gas precursor reactant of the High Temperature High Pressure after carbon dioxide heater 11 intensification generates dimethyl ether；The outlet of press water electrolysis bath 5 anode-side is the oxygen of 3MPa, and oxygen divides two-way, and a road enters Supercritical/Super-Supercritical Boilers 1 burning and forms oxygen-enriched combusting operating mode, and storage can be gone in another road.
The main entrance steam turbine 2 acting drive electromotor 3 that steams of Supercritical/Super-Supercritical Boilers 1 generates electricity, first the electricity that electromotor 3 sends meets the needs of network load, when the workload demand of electrical network is less than efficient routine (generally 80% rate of load condensate) of Thermal generation unit, Thermal generation unit is operated in 80% load, remaining electricity after deduction supply load is for each electrical equipment in the system of preparation of dimethyl ether electric more than the Thermal generation unit described by the present embodiment, including press water electrolysis bath 5 power consumption and hydrogen gas compressor 7 and carbon-dioxide gas compressor 10 power consumption etc..
The operating pressure of pressure electrolysis bath is 3.2Mpa, wherein the electrochemical reaction equation of negative electrode:
4H2O(l)+4e-==2H2(g)+4OH-(aq)
The electrochemical reaction equation of anode:
4OH-==O2(g)+2 H2O(l)+4e-
Steam turbine 2 medium pressure grade draws gas and is partly into hydrogen drying unit 7 dry hydrogen；It is partly into hydrogen heater 8 and carbon dioxide heater 11 preheats unstripped gas hydrogen and the carbon dioxide of one-step method DME synthesis.
In one-step method DME synthesis device, overall reaction is:
2CO2 + 6H2==CH3-O-CH3+3H2O
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components, be named title etc. can be different.All equivalences done according to structure, feature and the principle described in this utility model inventional idea or simple change, be all included in the protection domain of this utility model patent.Described specific embodiment can be made various amendment or supplements or use similar mode to substitute by this utility model person of ordinary skill in the field; without departing from structure of the present utility model or surmount scope defined in the claims, protection domain of the present utility model all should be belonged to.
Claims (5)
- null1. one kind by electricity more than Thermal generation unit and the system of tail flue gas waste heat preparation of dimethyl ether，Including boiler (1)、Steam turbine (2) and electromotor (3)，Boiler (1) produces steam and drives electromotor (3) to generate electricity by steam turbine (2)，It is characterized in that，Also include low-level (stack-gas) economizer (4)、Press water electrolysis bath (5)、Hydrogen dryer (6)、Hydrogen gas compressor (7)、Hydrogen heater (8)、Carbon dioxide capture device (9)、Carbon-dioxide gas compressor (10)、Carbon dioxide heater (11) and DME synthesis device (12)，Described boiler (1) tail flue gas is sequentially ingressed into low-level (stack-gas) economizer (4)、Carbon dioxide capture device (9) is discharged afterwards，The carbon dioxide of trapping sequentially passes through carbon-dioxide gas compressor (10)、Carbon dioxide heater (11) and DME synthesis device (12)；Described low-level (stack-gas) economizer (4) cut-in pressure water electrolyser (5), the hydrogen end that press water electrolysis bath (5) electrolysis produces is sequentially ingressed into hydrogen dryer (6), hydrogen gas compressor (7), hydrogen heater (8) and DME synthesis device (12).
- Electricity and the system of tail flue gas waste heat preparation of dimethyl ether more than Thermal generation unit the most according to claim 1, it is characterised in that: described hydrogen dryer (6), hydrogen heater (8) and carbon dioxide heater (11) are all by steam turbine (2) extraction for heat supply.
- Electricity and the system of tail flue gas waste heat preparation of dimethyl ether more than Thermal generation unit the most according to claim 1, it is characterised in that: described press water electrolysis bath (5), hydrogen gas compressor (7), carbon-dioxide gas compressor (10), DME synthesis device (12) are all powered by the remaining electricity of electromotor (3).
- Electricity and the system of tail flue gas waste heat preparation of dimethyl ether more than Thermal generation unit the most according to claim 1, it is characterised in that: described carbon dioxide heater (11) and hydrogen heater (8) are all by the remaining electricity auxiliary heating of electromotor (3).
- Electricity and the system of tail flue gas waste heat preparation of dimethyl ether more than Thermal generation unit the most according to claim 1, it is characterised in that: the oxygen that described press water electrolysis bath (5) produces is divided into two-way, and a road storage, another road is passed through boiler (1).
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| CN201620385730.2U CN205744027U (en) | 2016-05-03 | 2016-05-03 | Electricity and the system of tail flue gas waste heat preparation of dimethyl ether more than a kind of Thermal generation unit |
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| CN201620385730.2U CN205744027U (en) | 2016-05-03 | 2016-05-03 | Electricity and the system of tail flue gas waste heat preparation of dimethyl ether more than a kind of Thermal generation unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593971A (en) * | 2019-09-05 | 2019-12-20 | 国网河北能源技术服务有限公司 | Thermoelectric hydrogen poly-generation system for improving flexibility of thermoelectric unit |
| CN113237081A (en) * | 2021-06-07 | 2021-08-10 | 西安热工研究院有限公司 | Zero-carbon-emission green hydrogen alcoholization, preparation and storage combined upgrading and transformation system for coal-fired thermal power generating unit |
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2016
- 2016-05-03 CN CN201620385730.2U patent/CN205744027U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593971A (en) * | 2019-09-05 | 2019-12-20 | 国网河北能源技术服务有限公司 | Thermoelectric hydrogen poly-generation system for improving flexibility of thermoelectric unit |
| CN113237081A (en) * | 2021-06-07 | 2021-08-10 | 西安热工研究院有限公司 | Zero-carbon-emission green hydrogen alcoholization, preparation and storage combined upgrading and transformation system for coal-fired thermal power generating unit |
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