CN106640220A - Flue gas waste heat driving water feeding pump system - Google Patents
Flue gas waste heat driving water feeding pump system Download PDFInfo
- Publication number
- CN106640220A CN106640220A CN201610766166.3A CN201610766166A CN106640220A CN 106640220 A CN106640220 A CN 106640220A CN 201610766166 A CN201610766166 A CN 201610766166A CN 106640220 A CN106640220 A CN 106640220A
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- China
- Prior art keywords
- flue gas
- air
- turbine
- heat exchanger
- temperature
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to a flue gas waste heat driving water feeding pump system. The flue gas waste heat driving water feeding pump system comprises a flue gas-air heat exchanger, a compressor, a turbine and other devices. Flue gas exhausted from a high-temperature reheater still has higher temperature, and a certain amount of flue gas is extracted and enters the flue gas-air heat exchanger 3 for continuously releasing heat, wherein cold air is boosted by the compressor and then is introduced; air which is subjected to heat absorption and has certain temperature and pressure enters the turbine 1 for doing work; the turbine is connected with the water feeding pump; high-temperature air does work in the turbine for directly driving the water feeding pump; flue gas from an outlet of the flue gas-air heat exchanger is introduced into a coal economizer for continuously releasing the heat; and air exhausted from the turbine is fed into a boiler. According to the flue gas waste heat driving water feeding pump system disclosed by the invention, part of waste heat of the high-temperature flue gas is used for doing work to provide power for the water feeding pump system and replace high-temperature extracted steam or electric energy; and by using high-temperature steam to do work, the power consumption rate of a factory is increased or reduced, and integral economy of a unit is improved.
Description
Technical field
The present invention relates to fume afterheat utilizes field, and in particular to one kind drives feed-water pump using fume afterheat.
Background technology
In China, more than 70% electric power comes from fired power generating unit, for national economy fast development provide it is strong
Guarantee, however, fired power generating unit also consumes the whole nation about 50% fire coal, discharged the whole nation about 45%, 50% and 48% two
Sulfur oxide, nitrogen oxides and carbon dioxide.In recent years, domestic large sized unit puts into operation in large quantities, and gross coal consumption rate declines effect
Fruit significantly, however, " above pressing little " policy to transform greatly with fired power generating unit enters coda, further reduces fired power generating unit coal consumption
Difficulty is increasing.
The UTILIZATION OF VESIDUAL HEAT IN of station boiler is effectively to reduce the means of power generation energy resource loss.Chinese scholars this year is also in the neck
Domain has put into substantial amounts of research energy, achieves extensive achievement.On the other hand, it is also to improve using energy source that energy ladder is utilized
The effective means of rate.Heat energy can not possibly whole disposable transformations be mechanical energy, heat to power output efficiency is relevant with temperature height, high temperature
The taste of heat energy is higher than low temperature heat energy.The energy is used step by step by its taste, is also a kind of important conservation measures.
The feed pump type of drive of Large-scale fire-electricity unit mainly have following three kinds, i.e. motor-driven, host driven and
Small turbine drives.
Electric motor-driving way is to control feedwater flow by feed-regulating valve, or by motor by arrangements for speed regulation drive to
Water pump.This kind of type of drive has the advantages that structurally simple, economical property is good and safe；But when power of the assembling unit change is big, phase
The equipment of the motor answered and transformer equipment and automatic control system all will increase therewith, cause complete equipment cost consumption
Increase.
Main steam turbine type of drive is mainly connected by the axle of feed pump with the axle of big steam turbine, or arrangements for speed regulation and
The axle of feed pump is connected.
Small turbine drive mode is that acting drives feedwater pump work in little steam turbine by steam pumping.The method is in reality
Need to find reliable and stable and Rational Parameters steam using in；Meanwhile, the control system of this kind of mode is more complicated to cut fault rate
It is higher.
Existing feed pump driving means have respective advantage and defect, there is no flue gas acting direct drive mode.Currently
Smoke waste heat utilization system or energy ladder are more single using form, limit the raising of fired power generating unit efficiency of energy utilization.
Driven to pump using fume afterheat, can further improve cascaded utilization of energy efficiency.
In view of above-mentioned defect, the positive in addition research and innovation of the design people, to found a kind of fume afterheat drive to
Water pump system so as to more the value in industry.
The content of the invention
To solve above-mentioned technical problem, it is an object of the invention to provide a kind of driven thoroughly using high temperature reheater exiting flue gas
Flat machine acting, the fume afterheat for directly driving feedwater pump operation drives feed-water pump.
Fume afterheat of the present invention drives feed-water pump, including：Flue gas-air heat exchanger, compressor, turbine and water
Pump, wherein, the air intake of the flue gas-air heat exchanger is with the air outlet slit of compressor by compressing cold air conveyance conduit phase
Connection, the air intake of the flue gas-air heat exchanger is connected with the power gas entrance of turbine by high-temperature gas transmission pipeline,
The flue gas-air heat exchanger is additionally provided with smoke air inlet, and the flue gas of electric boiler is described by described smoke air inlet input
Flue gas-air heat exchanger, air is input into flue gas-sky via after compressor compresses via air by compression cold air conveyance conduit
Gas heat exchanger, the air that Jing flue gases are heated is input into turbine through high-temperature gas transmission pipeline, drives the turbine acting, described
Water pump described in flat drive connection, there is provided the energy needed for pump working.
Further, also including economizer, the flue gas of the exhanst gas outlet connection economizer of the flue gas-air heat exchanger enters
Mouthful, the exhanst gas outlet of flue gas-air heat exchanger described in the flue gas Jing completed with air heat-exchange is input into the economizer.
Further, the turbine drive connection compressor, the turbine provides the energy needed for the compressor operating.
Further, the flue gas-air heat exchanger adopts the heat exchange mode of heat transfer type, flue gas and air respectively to have oneself
Path, heat passes to air continually by heat-transfer area by flue gas.
Further, the turbine is joined directly together by arrangements for speed regulation with the axle of feed pump, and the arrangements for speed regulation will be described
Turbine work done directly inputs feed pump, and adjusts speed of feedwater according to load variations.
By such scheme, the present invention at least has advantages below：
Fume afterheat of the present invention drives feed-water pump, using part high-temperature flue gas waste heat classification acting, there is provided feed pump
System dynamic, replaces high temperature to draw gas or electric energy, saves high-temperature steam and causes steam turbine acting to increase or decrease station service power consumption rate, improves
The economy of unit.Abundant boiler waste heat utilization system mode, improves energy ladder and utilizes level.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Description of the drawings
Fig. 1 is the structural representation of one embodiment of the invention；
Wherein, 1 is turbine, and 2 is compressor, and 3 is flue gas-air heat exchanger, and 4 is boiler furnace outlet high-temperature flue gas, and 5 are
The exiting flue gas of flue gas-air heat exchanger 3,6 is pressure-air, and 7 is that flue gas-air heat exchanger 3 exports HTHP air, and 8 are
Turbine outlet air, 9 is feed pump, and 10 is the air into compressor.
Specific embodiment
With reference to the accompanying drawings and examples, the specific embodiment of the present invention is described in further detail.Hereinafter implement
Example is not limited to the scope of the present invention for illustrating the present invention.
Referring to Fig. 1, a kind of fume afterheat described in a preferred embodiment of the present invention drives feed-water pump, including flue gas-
The devices such as air heat exchanger 3, compressor 2, turbine 1, wherein being passed through high-temperature flue gas 4 and high pressure in the flue gas-air heat exchanger 3
Cold air 6, it is characterised in that absorb the HTHP air 7 after fume afterheat and do work into turbine 1, drive feed-water pump 9.
Described high temperature reheater exiting flue gas 4 still have higher temperature, be passed into flue gas-air heat exchanger 3 after
Continuous heat release, heat is passed to and be passed through after pressure-air economizer entrance, to carry out next stage grade using energy source.
Described pressure-air 6 compresses cold wind 10 and produces by compressor 2, and high temperature cigarette is absorbed in the hot device 3 of flue gas-airization
Impeller acting in turbine 1 is entered after the heat of gas, mechanical energy is converted heat energy into.A work(part produced by turbine 1 is supplied
Use to the compressed air of compressor 2, another part Jing arrangements for speed regulation are directly transmitted to feed-water pump, and for it power is provided.
Weary gas after doing work in turbine 1 still has uniform temperature and pressure, is passed into boiler hot air pipeline, moisture-free coal
Powder, there is provided stable burning situation.
The type selecting of flue gas-air heat exchanger 3 respectively has the logical of oneself using the heat exchange mode using heat transfer type, flue gas and air
Road, heat passes to air continually by heat-transfer area by flue gas.Because the air being passed through in flue gas-air heat exchanger 3 have compared with
High pressure, air side is larger with fume side pressure differential, and according to regenerative heat exchange mode, then air can in a large number leak into fume side, make
Into heat transfer deterioration, while increase exhaust gas volumn, temperature drop, and then affect the heat-transfer effect in next stage economizer.Air leaks
Enter fume side and the more cold wind 10 of compressor offer are be provided, the power consumption of compressor 2 increases, and affects the economy of system.
Compressor 2 adopts Axial Flow Compressor, compressor 2 cold air to be sucked from ambient atmosphere, is made through compressing step by step
Supercharging.Upon power-up of the system, compressor is driven by external starter, when the mechanic of the output of turbine 1 disappears more than compressor
After the mechanical work of consumption, starter is threaded off, and described fume afterheat drives feed-water pump to start independent operating.
When unit starting, cold air can not absorb heat from high-temperature flue gas, and turbine 1 is not yet started working, auxiliary in systems
Help outfit motorized motions mode, it is ensured that unit safety even running.When high-temperature flue gas are passed through flue gas-air heat exchanger 3, turbine
1 acting meets feed pump 9 and the demand of compressor 2, and cut-out auxiliary electric drives, used as standby；Or make the auxiliary motor
For generator operation, additional power is externally exported.
The duct length of described conveying HTHP air should try one's best shortening, and making the flow resistance of whole system reduces,
Make using air heat absorption-working system characteristics of compact layout.The material for using should meet high temperature resistant, high pressure requirement, it is ensured that system is in height
Safety, economical operation under temperature, high pressure.
Described high-temperature flue gas are extracted from high temperature reheater exiting flue gas, are because that generally high temperature reheater goes out
Mouth temperature is 800-900 DEG C, can meet to cold air and provide the requirement that heat further enters acting in turbine.In practical application
In, the fume extraction point of Temperature Matching can be chosen according to the temperature of cold air, flow.Flue gas is in flue gas-air in the present invention
Economizer entrance is passed through after exchanging heat in heat exchanger 3, not limited to this in practical application can select temperature according to the temperature levels after heat release
The remittance point of degree matching.
Described fume afterheat drives starter, arrangements for speed regulation, motorized motions source, the force pipe being related in feed-water pump
The equipment such as material existing ripe product in existing technical merit, size and type can be selected when being embodied as according to actual conditions
Number, here is omitted.
The above is only the preferred embodiment of the present invention, is not limited to the present invention, it is noted that for this skill
For the those of ordinary skill in art field, on the premise of without departing from the technology of the present invention principle, can also make it is some improvement and
Modification, these are improved and modification also should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of fume afterheat drives feed-water pump, it is characterised in that include：Flue gas-air heat exchanger, compressor, turbine
And water pump, wherein, the air intake of the flue gas-air heat exchanger is with the air outlet slit of compressor by compression cold air conveying
Pipeline is connected, and the air intake of the flue gas-air heat exchanger passes through high-temperature gas transmission pipeline with the power gas entrance of turbine
It is connected, the flue gas-air heat exchanger is additionally provided with smoke air inlet, the flue gas of electric boiler is defeated by described smoke air inlet
Enter the flue gas-air heat exchanger, air is input into via after compressor compresses via air by compression cold air conveyance conduit
Flue gas-air heat exchanger, the air that Jing flue gases are heated is input into turbine through high-temperature gas transmission pipeline, drives the turbine to do
Work(, water pump described in the turbine drive connection, there is provided the energy needed for pump working.
2. fume afterheat according to claim 1 drives feed-water pump, it is characterised in that described also including economizer
The smoke inlet of the exhanst gas outlet connection economizer of flue gas-air heat exchanger, flue gas described in the flue gas Jing completed with air heat-exchange-
The exhanst gas outlet of air heat exchanger is input into the economizer.
3. fume afterheat according to claim 1 drives feed-water pump, it is characterised in that the turbine drive connection pressure
Contracting machine, the turbine provides the energy needed for the compressor operating.
4. fume afterheat according to claim 1 drives feed-water pump, it is characterised in that the flue gas-air heat exchange
Device adopts the heat exchange mode of heat transfer type, flue gas and air respectively to have the path of oneself, and heat is passed continually by heat-transfer area by flue gas
To air.
5. fume afterheat according to claim 1 drives feed-water pump, it is characterised in that the turbine is filled by speed governing
Put and be joined directly together with the axle of feed pump, the turbine work done is directly inputted feed pump by the arrangements for speed regulation, and according to negative
Lotus change adjusts speed of feedwater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610766166.3A CN106640220A (en) | 2016-08-30 | 2016-08-30 | Flue gas waste heat driving water feeding pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610766166.3A CN106640220A (en) | 2016-08-30 | 2016-08-30 | Flue gas waste heat driving water feeding pump system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106640220A true CN106640220A (en) | 2017-05-10 |
Family
ID=58852672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610766166.3A Pending CN106640220A (en) | 2016-08-30 | 2016-08-30 | Flue gas waste heat driving water feeding pump system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106640220A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923339A (en) * | 2022-03-22 | 2022-08-19 | 昆明理工大学 | Medium-low temperature flue gas de-whitening, waste heat and water resource recovery system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19960762A1 (en) * | 1999-12-16 | 2001-06-28 | Daimler Chrysler Ag | Energy recovery system of turbine and compressor links these by power line with compressor downstream of included heat exchanger and turbine downstream plus fresh air input to compressor. |
| DE102010034231A1 (en) * | 2010-08-07 | 2012-02-09 | Daimler Ag | Method for recovering energy from effluent stream of e.g. petrol engine of motor car, involves guiding working medium to turbine in closed joule cyclic process, and arranging cooler between turbine and compressor |
| DE102010033659A1 (en) * | 2010-08-06 | 2012-02-09 | Daimler Ag | Method for recovering energy from exhaust stream of e.g. petrol engine in motor car, involves supplying exhaust gas stream to secondary side of working medium, where working medium is held in joule cyclic circuit |
| CN206221007U (en) * | 2016-08-30 | 2017-06-06 | 中国大唐集团科学技术研究院有限公司 | Fume afterheat drives feed-water pump |
-
2016
- 2016-08-30 CN CN201610766166.3A patent/CN106640220A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19960762A1 (en) * | 1999-12-16 | 2001-06-28 | Daimler Chrysler Ag | Energy recovery system of turbine and compressor links these by power line with compressor downstream of included heat exchanger and turbine downstream plus fresh air input to compressor. |
| DE102010033659A1 (en) * | 2010-08-06 | 2012-02-09 | Daimler Ag | Method for recovering energy from exhaust stream of e.g. petrol engine in motor car, involves supplying exhaust gas stream to secondary side of working medium, where working medium is held in joule cyclic circuit |
| DE102010034231A1 (en) * | 2010-08-07 | 2012-02-09 | Daimler Ag | Method for recovering energy from effluent stream of e.g. petrol engine of motor car, involves guiding working medium to turbine in closed joule cyclic process, and arranging cooler between turbine and compressor |
| CN206221007U (en) * | 2016-08-30 | 2017-06-06 | 中国大唐集团科学技术研究院有限公司 | Fume afterheat drives feed-water pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923339A (en) * | 2022-03-22 | 2022-08-19 | 昆明理工大学 | Medium-low temperature flue gas de-whitening, waste heat and water resource recovery system |
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Application publication date: 20170510 |