CN108826272A - Fused salt heat accumulating type steam superheating device and system - Google Patents
Fused salt heat accumulating type steam superheating device and system Download PDFInfo
- Publication number
- CN108826272A CN108826272A CN201810755342.2A CN201810755342A CN108826272A CN 108826272 A CN108826272 A CN 108826272A CN 201810755342 A CN201810755342 A CN 201810755342A CN 108826272 A CN108826272 A CN 108826272A
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- Prior art keywords
- fused salt
- storage tank
- steam
- heat
- heat exchanging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 98
- 238000003860 storage Methods 0.000 claims abstract description 49
- 238000005485 electric heating Methods 0.000 abstract description 14
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000008646 thermal stress Effects 0.000 abstract description 3
- 238000005338 heat storage Methods 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 description 13
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
- F22G1/16—Steam superheating characterised by heating method by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil
- F22G1/165—Steam superheating characterised by heating method by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil by electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/20—Controlling superheat temperature by combined controlling procedures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
- F28D2020/0047—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material using molten salts or liquid metals
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Central Heating Systems (AREA)
Abstract
The invention provides a molten salt heat accumulating type steam superheating device and system, wherein the device comprises: the electric heater comprises a fused salt storage tank, an electric heater and a heat exchange body, wherein a heating body and the heat exchange body of the electric heater are arranged in the fused salt storage tank; the heating body of the electric heater is immersed in the low-temperature section of the molten salt body in the molten salt storage tank to heat the molten salt, and the heat exchange body is immersed in the high-temperature section of the molten salt body in the molten salt storage tank to realize the heat exchange between the steam in the heat exchange body and the molten salt. The invention adopts the molten salt as the intermediate heat exchange medium, ensures that the electric heating body is not scaled and corroded by utilizing the liquid state and heat storage characteristics of the molten salt, ensures that the surface alternating thermal stress of the electric heating body is small, does not damage the electric heating body and prolongs the service life. The temperature fluctuation range of the heated steam is ensured to be small, and the requirement of intermittent steam supply is met.
Description
Technical field
The present invention relates to the heat recovery technologies in metallurgical technology, especially metallurgical technology, are concretely a kind of fused salts
Heat accumulating type steam superheater and system.
Background technique
A large amount of residual heat resources can be generated in metallurgical industry production process, for the needs for reaching production technology, in technique production
Often configure the recvery facility that has surplus heat, the recovery waste heat resource in the form of producing afterheat steam byproduct.The afterheat steam of production is more
Saturated vapor is vaporized for saturated vapor, such as iron and steel enterprise's steelmaking converter vaporization saturated vapor, heater for rolling steel.The waste heat of recycling
Steam is low under the pressure of the quality of steam, cannot be widely applied to high-quality industrial user, can only be transported to low-pressure steam pipe network conduct
The low-quality steam users such as life vapour, heating vapour, a small amount of technique heating vapour.It adopts non-heating region or heating districts are non-
Warm season section steam consumption is reduced, and is caused the afterheat steam of production largely to be diffused, is resulted in waste of resources.In addition, saturated vapor exists
Big along journey resistance damage in steam pipe network transmission process, carrying capacity is big, not only limits conveying distance and also wastes a large amount of thermal energy and water
Resource limits the effective use of waste heat saturated vapor.
In order to improve the economic benefit of enterprise, achieve the purpose that energy conservation, emission reduction, consumption reduction, how more than significantly more efficient utilization
Hot steam resource becomes the emphasis of energy conservation concern.Currently, the prior art is mostly to generate flue gas saturated vapor with fuel gas buring
Mode, improve afterheat steam quality for high-quality steam user use, it is such overheat saturated vapor mode there are technique, control
The disadvantages of system complex processed, equipment occupied space is big, initial cost is high.In recent years, one had been done in terms of improving low-pressure steam quality
Fixed effort, some use electrical heating method, but all rest on the theoretical or experimental stage, do not obtain practical application.
When carrying out Overheating Treatment to steam in the prior art, electric heater surface is easy overtemperature, influences electric heater service life,
Meanwhile it can not ensure the needs of periodic breaks variation vapour user.
Summary of the invention
To improve the service life for carrying out heater in Overheating Treatment to steam, interruption steam supply, the embodiment of the present invention are realized
A kind of fused salt heat accumulating type steam superheater is provided, including：Fused salt storage tank, electric heater and heat exchanging body, the electricity add
The calandria and heat exchanging body of hot device are all set in fused salt storage tank；Wherein,
The low-temperature zone that the calandria of the electric heater is immersed in the molten salt body in fused salt storage tank heats fused salt,
The heat exchanging body is immersed in the high temperature section of the molten salt body in fused salt storage tank, to realize that the steam in heat exchanging body and fused salt carry out heat
Exchange.
Meanwhile the present invention also provides a kind of fused salt heat accumulating type steam superheating systems, including：Steam thermal storage device, superheater；
The superheater includes：Fused salt storage tank, electric heater and heat exchanging body, the calandria of the electric heater
It is all set in fused salt storage tank with heat exchanging body；Wherein,
The low-temperature zone that the calandria of the electric heater is immersed in the molten salt body in fused salt storage tank heats fused salt,
The heat exchanging body is immersed in the high temperature section of the molten salt body in fused salt storage tank, to realize that the steam in heat exchanging body and fused salt carry out heat
Exchange；
The steam heat-storing device is connected with the heat exchanging body input terminal in superheater.
In the embodiment of the present invention, the system further includes：First pressure sensor, first flow sensor, are set to
Between the steam thermal storage device and heat exchanging body input terminal.
In the embodiment of the present invention, the system further includes：Second temperature sensor is set to the output end of heat exchanging body.
In the embodiment of the present invention, the system further includes：Third temperature sensor, the 4th temperature sensor, are set to
The fused salt storage tank, to acquire the high temperature section of the molten salt body in fused salt storage tank, the temperature of low-temperature zone.
In the embodiment of the present invention, the system further includes：PLC controller, electric cabinet, the PLC controller pass through electricity
Control case is connected with the electric heater.
The present invention is realizing electric energy heating saturated vapor simultaneously, using fused salt as intermediate heat transferring medium, utilizes its liquid
And thermal storage effect, it is ensured that electric heating body non-scaling is not corroded, it is ensured that electric heating body surface alternating thermal stress is small, will not its damage
It ruins, prolongs the service life.Ensure to be heated that vapor (steam) temperature fluctuating range is small, realizes the requirement of interruption steam supply.
For above and other objects, features and advantages of the invention can be clearer and more comprehensible, preferred embodiment is cited below particularly,
And cooperate institute's accompanying drawings, it is described in detail below.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram of fused salt heat accumulating type steam superheater disclosed by the invention；
Fig. 2 is the schematic diagram of the fused salt heat accumulating type steam superheating system in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of fused salt heat accumulating type steam superheaters, as shown in Figure 1, including：Fused salt storage tank
101, electric heater 102 and heat exchanging body 103, the calandria and heat exchanging body 103 of electric heater 102 are all set in fused salt storage tank
In；Wherein,
The low-temperature zone for the molten salt body 104 that the calandria of electric heater 102 is immersed in fused salt storage tank adds fused salt 104
Heat, heat exchanging body 103 are immersed in the high temperature section of the molten salt body 104 in fused salt storage tank 101, with realize the steam in heat exchanging body 103 with
Fused salt carries out heat exchange.
Meanwhile invention additionally discloses a kind of fused salt heat accumulating type steam superheating systems, as shown in Fig. 2, including：Steam thermal storage device
201, superheater；
Superheater includes：Fused salt storage tank 101, electric heater 102 and heat exchanging body 103, the calandria of electric heater 102
It is all set in fused salt storage tank 101 with heat exchanging body 103；
Steam heat-storing device 201 is connected with the input terminal of the heat exchanging body 103 in superheater.
Steam superheating system further includes：First pressure sensor 105, first flow sensor 106, are set to steam heat accumulation
Between device 201 and the input terminal of heat exchanging body 103.In the embodiment of the present invention, steam heat-storing device 201 passes through regulating valve 110 and the
One pressure sensor 105 is connected.
Second temperature sensor 109 is set to the output end of heat exchanging body.
Third temperature sensor 108, the 4th temperature sensor 107, are set in fused salt storage tank, third temperature sensor
The high temperature section temperature of molten salt body in 108 acquisition fused salt storage tanks, the 4th temperature sensor 107 acquire the temperature of molten salt body low-temperature zone
Degree.
In the embodiment of the present invention, system further includes：PLC controller, electric cabinet 202, PLC controller pass through electric cabinet 202
It is connected with electric heater 102.
The embodiment of the present invention is filled interior fused salt as intermediate heat transferring medium, is added indirectly using electric energy by setting fused salt storage tank
Hot saturated vapor is transformed into superheated steam and uses for high-quality steam user.
Electric heating body is equipped in the embodiment of the present invention in fused salt storage tank, fire end is immersed in molten salt body low-temperature zone,
Remain that the characteristic of liquid makes to be immersed in electric heating body outer surface therein non-scaling, is not corroded using fused salt.When electricity adds
When hot body electric load changes, thermal inertia is buffered using fused salt thermal storage effect, it is ensured that the variation of electric heating element surface temperature difference is small, avoids
Electric heating element is because alternate stress causes to damage, to prolong its service life.
In the embodiment of the present invention, fused salt-steam heat-exchanging body is equipped in fused salt storage tank, heat exchanging body is immersed in fused salt high temperature
In section.When electric heating body electric load changes, thermal inertia is buffered using fused salt thermal storage effect, ensures steam temperature in heat exchanging body
Spend slight amplitude variation；It can ensure that vapor (steam) temperature is unlikely to excessively high overtemperature in heat exchanging body, meets steam user after steam supply stopping
The interruption requirement of vapour.
The product of the embodiment of the present invention is a kind of device that saturated vapor can be changed into superheated steam, and the device is by fused salt
The composition such as storage tank, electric heating body, salt-vapour heat exchanging body.Fused salt, which fills, is generally cube shape, can also be to be cylindrical or spherical, electric heating
Body is generally in-built electrical resistive calandria, and the calandria of external electromagnetic induction or electric tracing mode can also be used.Storage heater is confessed
High-pressure saturated steam after adjusting valve group pressure regulation with steady pressure flow into salt-vapour heat exchanging body, the steam in salt-vapour heat exchanging body
Heat exchange is carried out with fused salt storage tank high temperature section fused salt, user is supplied outside qualified superheated steam after heat exchange and uses, it is low after heat exchange
Temperature molten salt gradually sinks to fused salt storage tank low-temperature zone because specific gravity is greater than high-temperature molten salt, and low-temperature zone fused salt is risen to height after electric energy heating
Temperature section continues to exchange heat with saturated vapor, and thermal energy is released to steam by fused salt continuous reciprocation cycle in storage tank.
The present invention is realizing electric energy heating saturated vapor simultaneously, using fused salt as intermediate heat transferring medium, utilizes its liquid
And thermal storage effect, it is ensured that electric heating body non-scaling is not corroded, it is ensured that electric heating body surface alternating thermal stress is small, will not its damage
It ruins, prolongs the service life.Ensure to be heated that vapor (steam) temperature fluctuating range is small, realizes the requirement of interruption steam supply.
Specific embodiment is applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Explanation be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (6)
1. a kind of fused salt heat accumulating type steam superheater, which is characterized in that the steam superheating device includes：Fused salt storage tank,
Electric heater and heat exchanging body, the calandria and heat exchanging body of the electric heater are all set in fused salt storage tank；Wherein,
The low-temperature zone that the calandria of the electric heater is immersed in the molten salt body in fused salt storage tank heats fused salt, described
Heat exchanging body be immersed in the high temperature section of the molten salt body in fused salt storage tank, to realize that the steam in heat exchanging body and fused salt carry out hot friendship
It changes.
2. a kind of fused salt heat accumulating type steam superheating system, which is characterized in that the system includes：Steam thermal storage device crosses hot charging
It sets；
The superheater includes：Fused salt storage tank, electric heater and heat exchanging body, the calandria of the electric heater and are changed
Hot body is all set in fused salt storage tank；Wherein,
The low-temperature zone that the calandria of the electric heater is immersed in the molten salt body in fused salt storage tank heats fused salt, described
Heat exchanging body be immersed in the high temperature section of the molten salt body in fused salt storage tank, to realize that the steam in heat exchanging body and fused salt carry out hot friendship
It changes；
The steam heat-storing device is connected with the heat exchanging body input terminal in superheater.
3. fused salt heat accumulating type steam superheating system as claimed in claim 2, which is characterized in that the system further includes：The
One pressure sensor, first flow sensor are set between the steam thermal storage device and heat exchanging body input terminal.
4. fused salt heat accumulating type steam superheating system as claimed in claim 2, which is characterized in that the system further includes：The
Two temperature sensors are set to the output end of heat exchanging body.
5. fused salt heat accumulating type steam superheating system as claimed in claim 2, which is characterized in that the system further includes：The
Three-temperature sensor, the 4th temperature sensor, are set to the fused salt storage tank, to acquire the high temperature of the molten salt body in fused salt storage tank
Section, the temperature of low-temperature zone.
6. fused salt heat accumulating type steam superheating system as claimed in claim 2, which is characterized in that the system further includes：PLC
Controller, electric cabinet, the PLC controller are connected by electric cabinet with the electric heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810755342.2A CN108826272A (en) | 2018-07-11 | 2018-07-11 | Fused salt heat accumulating type steam superheating device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810755342.2A CN108826272A (en) | 2018-07-11 | 2018-07-11 | Fused salt heat accumulating type steam superheating device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108826272A true CN108826272A (en) | 2018-11-16 |
Family
ID=64135824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810755342.2A Pending CN108826272A (en) | 2018-07-11 | 2018-07-11 | Fused salt heat accumulating type steam superheating device and system |
Country Status (1)
| Country | Link |
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2018
- 2018-07-11 CN CN201810755342.2A patent/CN108826272A/en active Pending
Patent Citations (8)
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