CN107345656A - A kind of steam raising plant using residual heat from boiler fume - Google Patents
A kind of steam raising plant using residual heat from boiler fume Download PDFInfo
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- CN107345656A CN107345656A CN201710670722.1A CN201710670722A CN107345656A CN 107345656 A CN107345656 A CN 107345656A CN 201710670722 A CN201710670722 A CN 201710670722A CN 107345656 A CN107345656 A CN 107345656A
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- steam
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- 239000003517 fume Substances 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000001816 cooling Methods 0.000 claims abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003546 flue gas Substances 0.000 claims abstract description 13
- 239000000779 smoke Substances 0.000 claims abstract description 9
- 239000002826 coolant Substances 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 6
- 238000010025 steaming Methods 0.000 claims description 4
- 230000004660 morphological change Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 22
- 239000003245 coal Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009834 vaporization Methods 0.000 description 5
- 230000008016 vaporization Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of steam raising plant using residual heat from boiler fume, the device includes：Chimney heat exchanger, steam heater, steam condensate (SC) case and WATER AS FLOW MEDIUM；Wherein, the chimney heat exchanger is arranged in the discharge-channel of boiler smoke, the steam generator and lower condensate sump being connected with heat exchanger tube are provided with flue gas heat-exchange unit, the steam generator is connected by steam pipework with the steam inlet of the steam heater, the condensation-water drain of steam heater is connected with the condensing water inlet of the steam condensate (SC) case, the condensation-water drain of steam condensate (SC) case is connected the circulation loop to form WATER AS FLOW MEDIUM by water pump with the lower condensate sump, it is additionally provided with the steam heater and vapor heated cooling line, the port of export of the cooling line is connected with heat-needing facility.The physical characteristics of heat release of the invention of being absorbed heat using water in morphologic change, are transmitted heat using steam as the medium between chimney heat exchanger and steam heater, improve heat exchange efficiency.
Description
Technical field
The present invention relates to the technical field of coal steam-electric plant smoke UTILIZATION OF VESIDUAL HEAT IN, especially a kind of steaming using residual heat from boiler fume
Vapour generating means.
Background technology
Thermal power generation production process is carried out according to Rankine cycle principle at present, in the process that heat, work(, electricity are changed
In, there is larger thermal loss.During the entire process of energy conversion, in all heats released by fuel combustion only
35% or so is eventually converted into available electric energy, and the energy of others 60% or so is in Turbine Cold Junction low-temperature receiver and boiler
Smoke evacuation is lost in surrounding environment, and the heat loss due to exhaust gas of boiler is the major heat loss source of boiler among these.According to statistics, exist
In thermal power plant, flue gas loss is maximum in boiler various heat losses one, typically about 5%-12%, accounts for boiler heat loss
60%-70%.The principal element for influenceing heat loss due to exhaust gas is exhaust gas temperature, and generally, exhaust gas temperature often increases by 10 DEG C, row
Cigarette heat loss increases 0.6%-1%, corresponding more consumption coal 1.2%-2.4%.The design exhaust gas temperature of general station boiler is at 120-140 DEG C
Left and right, in China, there is that the exhaust gas temperature of large quantities of operating units is higher, be much higher than 20-30 DEG C of design load, some even connects
Nearly 200 DEG C.
The exhaust gas temperature of boiler is too high, causes the increase of the consumption of coal amount in thermal power plant.Research shows, if smoke evacuation heat
Amount is directly utilized by boiler, and exhaust gas temperature reduces by 22 DEG C, and boiler efficiency will improve 1%.In addition, exhaust gas temperature rises, also
ESP Efficiency can be caused to decline, cause the increase of sulfur removal technology water consume water, increase the operating cost of desulphurization system.
Therefore, from the aspect of energy-saving and emission-reduction and economy two, exhaust gas temperature is further reduced, deep exploitation is carried out all to smoke discharging residual heat
It is the inevitable choice of current station boiler energy-conserving and emission-cutting technology development.
In recent years, according to the situation of reality, power industry proposes many beneficial and practical method, to utilize power station
The smoke exhaust heat of boiler, the production cost in power station is also reduced while the energy is saved.In this case, coal is saved using low temperature
Device starts to utilize extensively for people as an effective method.According to the difference of UTILIZATION OF VESIDUAL HEAT IN purposes, it is with the solidifying of power station
Bear water or heating network water, as cooling water, by before boiler tail deduster or wet desulphurization absorption tower entrance installs flue gas
Waste-heat recovery device, while recovery boiler low-temperature flue gas heat, not only reduce flue-gas temperature and flue gas loss, same to time
Water consumption about in sweetening process, improves efficiency, serves good effect.
Existing many coal-burning power plants domestic at present have carried out installation and the retrofit work of low-level (stack-gas) economizer, in practical application
In, it is found that low-level (stack-gas) economizer is arranged on flue gas downstream difference position and carrys out considerable influence to equipment belts such as dedusting, desulfurization.Nearly two
There are the actual many power plant's selections in the situation of basic research, Practical Project in advance of engineering in low-level (stack-gas) economizer technical field over year
Low-level (stack-gas) economizer is arranged on the flue after air preheater before deduster, but many engineerings start after find that low-level (stack-gas) economizer is present
More serious corrosion, wear and dust stratification problem, serious even causes low-level (stack-gas) economizer to leak, and the safety economy to power plant is transported
Row brings greater risk.In this context, the integrated configuration of low-level (stack-gas) economizer and various dedusters is studied, determines that best-of-breed technology is low
Warm economizer allocation plan, the technical scheme that low-level (stack-gas) economizer is set in house outlet is especially studied, for further referring to
The transformation of energy saving for power plants emission-reduction technology is led, especially for the transformation up to standard of the synthesis under current coal unit minimum discharge background all
It is vital.
In actual applications, heat recovery acquires a certain degree of difficulty, when being exchanged heat using usual heat exchanger, by
The reduction of heat transfer temperature difference in boiler heating surface between flue gas and working medium is, it is necessary to increase heat transfer area, it is therefore desirable to arrangement compared with
More heat exchanger tubes, this can cause a series of contingency question, including the increase of power, the resistance consumption of pipeline and cost to increase
It is more.Meanwhile the setting of exhaust gas temperature is also more important, exhaust gas temperature is higher, the DeGrain of UTILIZATION OF VESIDUAL HEAT IN, and if smoke evacuation
Temperature setting is too low, and the wall temperature for being likely to result in heating surface is less than acid dew-point temperature, so as to cause the solidifying of sulfureous in flue gas acid vapor
Knot, causes the heavy corrosion of heating surface metal, significant impact is caused to safe operation of the boiler.The heat exchange of low-level (stack-gas) economizer exists simultaneously
Flue gas carry out between water, boiler low-temperature fume utilization rate of waste heat is low.
The content of the invention
For problems of the prior art, it is an object of the invention to provide a kind of steaming using residual heat from boiler fume
The heat discharged when vapour generating means, heat transferring medium water being heated into steam using fume afterheat as thermal source, then steam being condensed
Heat exchange is carried out with heat-needing facility, using the latent heat of vaporization of steam, heat exchange efficiency is improved, fume afterheat is made full use of so as to reach
Purpose, while it is big to solve equipment investment, high energy consumption, the problem of chimney heat exchanger low-temperature corrosion.
To achieve these goals, concrete scheme of the invention is as follows：
A kind of steam raising plant using residual heat from boiler fume, the device include：Chimney heat exchanger, steam heater, steam
Condensation water tank and WATER AS FLOW MEDIUM；Wherein, the chimney heat exchanger is arranged in the discharge-channel of boiler smoke, is set on flue gas heat-exchange unit
The steam generator and lower condensate sump being connected with heat exchanger tube are equipped with, the steam generator is added by steam pipework and the steam
The steam inlet connection of hot device, the condensation-water drain of steam heater are connected with the condensing water inlet of the steam condensate (SC) case,
The condensation-water drain of steam condensate (SC) case is connected the circulation loop to form WATER AS FLOW MEDIUM, the steaming by water pump with the lower condensate sump
It is additionally provided with vapour heater and is connected with vapor heated cooling line, the port of export of the cooling line with heat-needing facility.
Further, being connected with the heat-exchanging loop makes steam be worked under vacuum environment vaccum-pumping equipment.
Further, the vaccum-pumping equipment is vavuum pump, and the vavuum pump is connected with the steam condensate (SC) case.
Further, the water pipe of the WATER AS FLOW MEDIUM is provided with the steam condensate (SC) case, is set on the water pipe
It is equipped with the first control valve.
Further, it is provided with condensate pump on the pipeline that the steam condensate (SC) case is connected with the lower condensate sump and is used for
Control the second control valve of the steam generator water level.
Further, it is provided with visor on the steam generator.
Further, the cooling medium in the cooling line is water.
Further, the heat-needing facility needs the equipment of heat energy for other in the preheating water tank of boiler or thermal power plant.
The physical characteristics of heat release of the invention of being absorbed heat using water in morphologic change, chimney heat exchanger and steam are used as using steam
Medium between heater transmits heat, improves heat exchange efficiency；The latent heat of vaporization of cooling water under vacuum conditions improves, and fills
Divide the latent heat of vaporization using steam, so as to improve heat exchange efficiency, reduce system cost.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of steam raising plant using residual heat from boiler fume of the invention；
Wherein, 1 chimney heat exchanger, 2 steam heaters, 3 steam condensate (SC) casees, 4 steam generators, 5 lower condensate sumps, 6 visors, 7
Steam pipework, 8 steam inlets, 9 condensation-water drains, 10 vavuum pumps, 11 first control valves, 12 condensate pumps, 13 second control valves,
14 water pipe water inlets, 15 cooling line arrival ends, the 16 cooling line ports of export, 17 heat exchanger tubes.
Embodiment
The principle and feature of the present invention are more fully illustrated below with reference to accompanying drawing and example.The present invention can be with
A variety of multi-forms are presented as, are not construed as being confined to the exemplary embodiment described here.
For ease of explanation, the space relative terms such as " on ", " under ", "left", "right" can be used herein, are used for
The element or feature shown in explanation figure is relative to another element or the relation of feature.It should be understood that except figure
In outside the orientation that shows, spatial terminology is intended to include the different azimuth of device in use or operation.If for example, in figure
Device be squeezed, be stated as positioned at other elements or feature " under " element will be located into other elements or feature " on ".
Therefore, exemplary term " under " both upper and lower orientation can be included.Device can be positioned otherwise（It is rotated by 90 ° or position
In other orientation）, can correspondingly be explained used herein of the relative explanation in space.
As shown in figure 1, the present embodiment specifically discloses a kind of steam raising plant using residual heat from boiler fume, the device
Mainly include：Chimney heat exchanger 1, steam heater 2, steam condensate (SC) case 3 and WATER AS FLOW MEDIUM；
Chimney heat exchanger 1 is arranged in boiler air preheater exhaust pass, and flue gas heat-exchange unit 1 includes heat exchanger tube 17, steam is sent out
Raw device 4 and lower condensate sump 5, steam generator 4 and lower condensate sump 5 are connected with heat exchanger tube 17, and visor is provided with steam generator 4
6, the operating mode such as water level for observing steam generator 4；
The heat transfer that steam heater 2 is used to carry steam is into the cooling medium of cooling line, by cooling medium by heat
Amount is brought into heat-needing facility, and steam heater 2 includes steam inlet 8, condensation-water drain 9, cooling line arrival end and cooling tube
Way outlet end 16, preferable cooling medium are water, steam enter steam heater 2 from steam inlet 8 after with cooling line
Cooling medium exchanges heat, and condenses after steam heat-exchanging and is flowed out from condensation-water drain 9, cooling medium enters from cooling line arrival end 15
Enter, lifted in steam heater 2 with temperature after steam heat-exchanging, flowed out from the cooling line port of export 16, be passed through heat-needing facility, this
In heat-needing facility can be boiler preheating water tank or thermal power plant in other need the equipment of heat energy.
Steam condensate (SC) case 3 is connected with the condensation-water drain 9 of steam heater 2, and is connected with lower condensate sump 5, is formed and is situated between
The circulation loop of matter water, water pipe is provided with steam condensate (SC) case 3, the first control valve 11 is provided with water pipe,
WATER AS FLOW MEDIUM enters in steam condensate (SC) case 3 from water pipe water inlet 14, and vaccum-pumping equipment is connected with steam condensate (SC) case 3,
In the present embodiment, vaccum-pumping equipment is vavuum pump 10, and vavuum pump 10 is connected with steam condensate (SC) case 3, by the sky in circulation loop
Gas is discharged into air, circulation loop is in vacuum state, the characteristics of raising using the latent heat of vaporization of cooling water under vacuum conditions,
The latent heat of vaporization of steam is made full use of, so as to improve heat exchange efficiency, reduces system cost.Steam condensate (SC) case 3 and next part
The control valve 13 of condensate pump 12 and second is provided with the pipeline that water tank 5 connects.Condensate pump 12 is used to be in circulation loop
Medium circulation provides power, and the second control valve 13 is used for the water level for controlling steam generator 4.
Several preferred embodiments of the application, but the application not limited to this, every ability are only described above in association with accompanying drawing
Domain those of ordinary skill is not in the case where departing from spirit herein, any improvement and/or deformation made, belongs to the guarantor of the application
Protect scope.
Claims (8)
1. a kind of steam raising plant using residual heat from boiler fume, it is characterised in that the device includes：Chimney heat exchanger, steaming
Vapour heater, steam condensate (SC) case and WATER AS FLOW MEDIUM；Wherein, the chimney heat exchanger is arranged in the discharge-channel of boiler smoke,
The steam generator and lower condensate sump being connected with heat exchanger tube are provided with flue gas heat-exchange unit, the steam generator passes through steam pipe
Road is connected with the steam inlet of the steam heater, and the condensation-water drain of steam heater is cold with the steam condensate (SC) case
Condensate entrance connects, and the condensation-water drain of steam condensate (SC) case is connected to form following for WATER AS FLOW MEDIUM by water pump with the lower condensate sump
Loop back path, is additionally provided with the steam heater and vapor heated cooling line, and the port of export of the cooling line is with needing
Hot equipment connection.
2. device as claimed in claim 1, it is characterised in that being connected with the heat-exchanging loop makes steam under vacuum environment
Work vaccum-pumping equipment.
3. device as claimed in claim 2, it is characterised in that the vaccum-pumping equipment is vavuum pump, the vavuum pump and institute
State the connection of steam condensate (SC) case.
4. device as claimed in claim 1, it is characterised in that the benefit of the WATER AS FLOW MEDIUM is provided with the steam condensate (SC) case
Water lines, the first control valve is provided with the water pipe.
5. device as claimed in claim 1, it is characterised in that the pipe that the steam condensate (SC) case is connected with the lower condensate sump
Condensate pump and the second control valve for controlling the steam generator water level are provided with road.
6. device as claimed in claim 1, it is characterised in that be provided with visor on the steam generator.
7. device as claimed in claim 1, it is characterised in that the cooling medium in the cooling line is water.
8. device as claimed in claim 1, it is characterised in that the heat-needing facility is in the preheating water tank of boiler or thermal power plant
Other need the equipment of heat energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710670722.1A CN107345656A (en) | 2017-08-08 | 2017-08-08 | A kind of steam raising plant using residual heat from boiler fume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710670722.1A CN107345656A (en) | 2017-08-08 | 2017-08-08 | A kind of steam raising plant using residual heat from boiler fume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107345656A true CN107345656A (en) | 2017-11-14 |
Family
ID=60257474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710670722.1A Pending CN107345656A (en) | 2017-08-08 | 2017-08-08 | A kind of steam raising plant using residual heat from boiler fume |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108067077A (en) * | 2018-02-26 | 2018-05-25 | 台山市新英汉装饰材料有限公司 | A kind of cooling back installation for boiler waste gas processing |
| CN109578966A (en) * | 2018-12-04 | 2019-04-05 | 杭州联赫节能环保技术有限公司 | A kind of heat pipe evaporator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201246988Y (en) * | 2008-05-30 | 2009-05-27 | 李德平 | Vacuum phase-change heat exchanger |
| CN104913294A (en) * | 2014-10-02 | 2015-09-16 | 大唐(北京)能源管理有限公司 | Waste heat recovery system for smoke discharging of thermal power plant boiler |
| CN105277027A (en) * | 2015-11-05 | 2016-01-27 | 吉林省电力科学研究院有限公司 | Phase-change heat exchanger and heat exchange method thereof |
| RU2583499C1 (en) * | 2014-10-14 | 2016-05-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Мордовский государственный университет им. Н.П. Огарёва" | Heat supply system and method for operation thereof |
| CN206755129U (en) * | 2017-08-08 | 2017-12-15 | 北京尤科恩环保工程有限公司 | A kind of steam raising plant using residual heat from boiler fume |
-
2017
- 2017-08-08 CN CN201710670722.1A patent/CN107345656A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201246988Y (en) * | 2008-05-30 | 2009-05-27 | 李德平 | Vacuum phase-change heat exchanger |
| CN104913294A (en) * | 2014-10-02 | 2015-09-16 | 大唐(北京)能源管理有限公司 | Waste heat recovery system for smoke discharging of thermal power plant boiler |
| RU2583499C1 (en) * | 2014-10-14 | 2016-05-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Мордовский государственный университет им. Н.П. Огарёва" | Heat supply system and method for operation thereof |
| CN105277027A (en) * | 2015-11-05 | 2016-01-27 | 吉林省电力科学研究院有限公司 | Phase-change heat exchanger and heat exchange method thereof |
| CN206755129U (en) * | 2017-08-08 | 2017-12-15 | 北京尤科恩环保工程有限公司 | A kind of steam raising plant using residual heat from boiler fume |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108067077A (en) * | 2018-02-26 | 2018-05-25 | 台山市新英汉装饰材料有限公司 | A kind of cooling back installation for boiler waste gas processing |
| CN109578966A (en) * | 2018-12-04 | 2019-04-05 | 杭州联赫节能环保技术有限公司 | A kind of heat pipe evaporator |
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Application publication date: 20171114 |
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