CN116294739A - Solid metal heat storage industrial steam supply device and industrial steam supply method - Google Patents
Solid metal heat storage industrial steam supply device and industrial steam supply method Download PDFInfo
- Publication number
- CN116294739A CN116294739A CN202310344370.6A CN202310344370A CN116294739A CN 116294739 A CN116294739 A CN 116294739A CN 202310344370 A CN202310344370 A CN 202310344370A CN 116294739 A CN116294739 A CN 116294739A
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- heat storage
- heat
- air
- metal heat
- air duct
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- 238000005338 heat storage Methods 0.000 title claims abstract description 85
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 73
- 239000002184 metal Substances 0.000 title claims abstract description 73
- 239000007787 solid Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009826 distribution Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 49
- 238000004321 preservation Methods 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 238000005485 electric heating Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 229910000805 Pig iron Inorganic materials 0.000 claims description 3
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 3
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 238000010248 power generation Methods 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- 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
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
-
- 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
Abstract
The invention belongs to the technical field of heat storage, and particularly relates to a solid metal heat storage industrial steam supply device and an industrial steam supply method. The heat accumulator adopts metal with good heat conducting property and moderate specific heat capacity as the heat accumulator, and the heat accumulator has the advantages of wide raw material distribution, easy processing of the heat accumulator, high cost performance and good popularization benefit.
Description
Technical Field
The invention belongs to the technical field of electric heat storage, and particularly relates to a solid metal heat storage industrial steam supply device and an industrial steam supply method.
Background
With the increasing installed capacity of new energy power generation, the thermal power generating unit needs to reduce the power generation load to carry out peak shaving when appropriate based on the consideration of energy safety. The electric heat storage technology is used as a flexible peak shaving means capable of realizing thermal decoupling, and is applied to a plurality of thermal power plants.
The current electric heat storage device materials in the thermal power plant are mainly solid magnesia bricks, and most application scenes are that the water return of a heat supply network is heated to the water supply temperature to meet the heating and heat supply requirements of residents, and low-temperature desalted water is heated to the superheated steam to be used for industrial steam supply. In addition, in the practical application, the problem of chalking caused by damp occurs in the bad scene of some protection measures, and the manufacturing cost of the solid magnesia brick as a heat accumulator is always high. The method for finding a proper solid heat storage material and designing a reasonable solid metal heat storage industrial steam supply method is used for storing heat during low-load peak regulation of the unit, and releasing heat during high-load of the unit becomes the problem to be solved by the application.
Disclosure of Invention
The invention aims to provide a solid metal heat storage industrial steam supply device and an industrial steam supply method, which adopt metal as a heat storage body, can be used as the heat storage body as long as the metal has good heat conduction performance and moderate specific heat capacity, has high cost performance and has good popularization benefit.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in a first aspect, a solid metal heat storage industrial steam supply device comprises an air heating device, an air duct baffle, a metal heat storage column, an air duct, a heat storage heat preservation layer, a fan and an evaporator;
the metal heat storage column body and the air heating device are arranged in the heat storage body heat preservation layer, and the air heating device is used for heating air in the heat storage body heat preservation layer so as to heat the metal heat storage column body through thermal conduction;
the two ends of the air channel are respectively provided with the air channel baffle, and the air channel is respectively communicated with the two ends of the heat accumulator heat preservation layer through the air channel baffle;
the fan is arranged in the air duct and is positioned at the communication position of the air duct and the heat accumulator heat preservation layer;
the evaporator is arranged in the air duct.
Preferably, a power distribution cabinet is arranged on the outer side of the heat accumulator heat preservation layer and used for supplying power to the air heating device.
Preferably, the evaporator is connected with the water feeding pump and the superheater through pipelines respectively.
Preferably, a preheater is arranged between the evaporator and the feed water pump.
Preferably, a steam drum is arranged between the evaporator and the superheater.
Preferably, the fan is a high-temperature-resistant variable-frequency fan.
Preferably, the heat accumulator heat preservation layer is an aluminum silicate heat preservation layer, and a protection plate is arranged outside the heat accumulator heat preservation layer.
Preferably, the metal heat storage column is any one or combination of cast iron, cast steel, pig iron, wrought iron, carbon steel and other materials.
Preferably, the air heating device is one of an electric heating pipe, an electric heating wire and an electric heating sheet.
In a second aspect, a method for supplying industrial steam based on a solid metal heat storage industrial steam supply device comprises the following steps:
s1: closing the air duct baffle, and enabling an external power supply to provide electric energy for the air heating device through the power distribution cabinet, wherein the air heating device converts the electric energy into self heat energy;
s2: the heat of the air heating device is transferred to the low-temperature air through heat conduction, heat convection and heat radiation, and the low-temperature air is heated to a set temperature;
s3: the heated air transfers heat to the metal heat storage column body through natural convection and heat conduction, and the metal heat storage column body stores heat after heating;
s4: closing a power supply of an air heating device in the power distribution cabinet, opening an air duct baffle and a fan, and carrying out forced convection heat exchange on cold air in the air duct through a metal heat storage column body, wherein the metal heat storage column body heats the cold air in the air duct;
s5: continuing the heat exchange process of S4, and after air circulates between the air duct and the metal heat storage column for a period of time, enabling the air in the air duct to reach a preset temperature;
s6: the low-temperature water supply of the external water supply system is pressurized by a water supply pump, the low-temperature water supply is changed into high-temperature water supply by a preheater, then is changed into saturated steam by an evaporator, and finally is changed into superheated steam meeting the demands of users by heating by a superheater.
Compared with the prior art, the invention has the following beneficial effects:
the application provides a solid metal heat accumulation supplies industrial steam device, including air heating device, metal heat accumulation cylinder, heat accumulator heat preservation, metal heat accumulation cylinder and air heating device all set up in the heat accumulator heat preservation, and air heating device is used for heating the air in the heat accumulator heat preservation, and then heats metal heat accumulation cylinder through thermal conduction. The heat accumulator adopts metal with good heat conducting property and moderate specific heat capacity as the heat accumulator, and the heat accumulator has the advantages of wide raw material distribution, easy processing of the heat accumulator, high cost performance and good popularization benefit.
In the solid metal heat accumulation supplies industrial steam device that this application provided, the fan is the variable frequency fan, through the size of variable frequency fan control heat pick up volume, satisfies different steam user's parameter requirement, and the suitability is better.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
In the drawings:
FIG. 1 is a schematic diagram of a solid metal heat storage industrial steam supply device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a metal heat storage column according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of an industrial steam supply method according to an embodiment of the invention.
In the figure, a power distribution cabinet 1, an air heating device 2, an air duct baffle 3, a metal heat storage column 4, an air duct 5, a heat storage heat insulation layer 6, a fan 7, a superheater 8, an evaporator 9, a preheater 10 and a water supply pump 11.
Detailed Description
The invention will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
The following detailed description is exemplary and is intended to provide further details of the invention. Unless defined otherwise, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention.
Example 1
As shown in fig. 1, the solid metal heat storage industrial steam supply device comprises an air heating device 2, an air duct baffle 3, a metal heat storage column 4, an air duct 5, a heat storage body heat preservation layer 6, a fan 7 and an evaporator 9;
the metal heat storage column 4 and the air heating device 2 are both arranged in the heat storage body heat preservation layer 6, and the air heating device 2 is used for heating air in the heat storage body heat preservation layer 6 so as to heat the metal heat storage column 4 through heat conduction; the two ends of the air duct 5 are respectively provided with the air duct baffle 3, and the air duct 5 is respectively communicated with the two ends of the heat accumulator heat preservation layer 6 through the air duct baffle 3; the fan 7 is arranged in the air duct 5 and is positioned at the communication position of the air duct 5 and the heat accumulator heat preservation layer 6; the evaporator 9 is arranged in the air duct 5.
Through the arrangement, the heat accumulator adopts the metal with good heat conduction performance and moderate specific heat capacity as the heat accumulator, the raw materials are widely distributed, the heat accumulator is easy to process, the cost performance is high, and the popularization benefit is good.
Specifically, the evaporator 9 is connected with the feed pump 11 and the superheater 8 through pipelines respectively, a preheater 10 is arranged between the evaporator 9 and the feed pump 11, and a steam drum is arranged between the evaporator 9 and the superheater 8. The superheater 8, the evaporator 9 and the preheater 10 are tubular heat exchangers, saturated steam is arranged in the tubes, and hot air flows out of the tubes.
Specifically, the fan 7 is a high-temperature-resistant variable-frequency fan, can work in a high-temperature environment, and can adapt to the temperature requirements of different heat users by adjusting the rotating speed of the fan and the temperature of hot air in the air duct 5.
Specifically, the heat accumulator heat preservation layer 6 is an aluminum silicate heat preservation layer, and a protection plate is arranged outside the heat accumulator heat preservation layer.
Specifically, as shown in fig. 1 and fig. 2, the air heating device 2 and the metal heat storage columns 4 are uniformly arranged inside the heat storage body heat insulation layer 6, which may be layered, specifically, each layer is provided with a plurality of metal heat storage columns 4, and the metal heat storage columns 4 of two adjacent layers may be staggered or arranged in parallel, as shown in fig. 1. The air heating device 2 is arranged between two adjacent layers of metal heat storage columns 4, and a plurality of air heating devices 2 can be arranged to heat the metal heat storage columns 4, so that the heating requirement is met.
Further specifically, the metal heat storage columns 4 can be arranged in staggered mode perpendicular to the ground in the heat storage body heat preservation layer 6, so that the structural stability is good, and meanwhile, the heat exchange efficiency is improved.
As an example, the metal heat storage cylinder 4 may be any one or a combination of materials such as cast iron, cast steel, pig iron, wrought iron, carbon steel, and the like.
Preferably, a power distribution cabinet 1 is arranged on the outer side of the heat accumulator heat preservation layer 6 and is used for supplying power to the air heating device 2. In the present application, the power source of the air heating device 2 may be peak shaving surplus power, or other power, such as new energy power generation, etc. The thermal power flexibility transformation of the thermal decoupling can be realized by using the surplus peak-shaving power, and the national relevant industrial policy is met.
As an example, the air heating device 2 may be one of an electric heating tube, an electric heating wire, and an electric heating sheet.
Example 2
An industrial steam supply method based on the solid metal heat storage industrial steam supply device of the embodiment 1, comprising the following steps:
the heat accumulating method comprises the following steps:
s1: closing the air duct baffle 3, and supplying electric energy to the air heating device 2 by an external power supply through the power distribution cabinet 1, wherein the air heating device 2 converts the electric energy into self heat energy;
s2: the heat of the air heating device 2 is transferred to the low-temperature air through heat conduction, heat convection and heat radiation, and the low-temperature air is heated to a set temperature;
s3: the heated air transfers heat to the metal heat storage column 4 through natural convection and heat conduction, and the metal heat storage column 4 stores heat after heating;
the heat converted from the electric energy is stored in the metal heat storage column 4 through steps S1 to S3.
A method of supplying industrial steam comprising the steps of:
s4: closing a power supply of an air heating device 2 in the power distribution cabinet, opening an air duct baffle 3 and a fan 7, and carrying out forced convection heat exchange on cold air in an air duct 5 through a metal heat storage column 4, wherein the metal heat storage column 4 heats the cold air in the air duct 5;
s5: continuing the heat exchange process of the step S4, and after air circulates between the air duct 5 and the metal heat storage column 4 for a period of time, the air in the air duct 5 reaches a preset temperature;
s6: the low-temperature water supply of the external water supply system is pressurized by a water supply pump 11, the low-temperature water supply is changed into high-temperature water supply by a preheater 10, then is changed into saturated steam by an evaporator 9, and finally is changed into superheated steam meeting the demands of users by heating by a superheater 8.
And through the steps S4-S6, the heat of the metal is transferred to the steam-water system, and the stored heat is released.
Specifically, in steps S1 to S3, the air heating device 2 and the metal heat storage columns 4 are uniformly layered in the heat storage body heat insulation layer 6, each layer is provided with a plurality of metal heat storage columns 4, the metal heat storage columns 4 of two adjacent layers are staggered, and the air heating device 2 is arranged between the two adjacent layers of metal heat storage columns 4 to heat the metal heat storage columns 4.
Specifically, the fan 7 in the step S4 is a high-temperature-resistant variable-frequency fan, can work in a high-temperature environment, and can adapt to the temperature requirements of different heat users by adjusting the rotating speed of the fan and the temperature of hot air in the air duct 5.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more. In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It will be appreciated by those skilled in the art that the present invention can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the invention or equivalents thereto are intended to be embraced therein.
Claims (10)
1. The solid metal heat storage industrial steam supply device is characterized by comprising an air heating device (2), an air duct baffle (3), a metal heat storage column (4), an air duct (5), a heat storage body heat preservation layer (6), a fan (7) and an evaporator (9);
the metal heat storage column body (4) and the air heating device (2) are arranged in the heat storage body heat preservation layer (6), and the air heating device (2) is used for heating air in the heat storage body heat preservation layer (6) so as to heat the metal heat storage column body (4) through thermal conduction;
the two ends of the air duct (5) are respectively provided with the air duct baffle (3), and the air duct (5) is respectively communicated with the two ends of the heat accumulator heat preservation layer (6) through the air duct baffle (3);
the fan (7) is arranged in the air duct (5) and is positioned at the communication position of the air duct (5) and the heat accumulator heat preservation layer (6);
the evaporator (9) is arranged in the air duct (5).
2. The solid metal heat storage industrial steam supply device according to claim 1, characterized in that a power distribution cabinet (1) is arranged on the outer side of the heat storage body heat preservation layer (6) and is used for supplying power to the air heating device (2).
3. The solid metal heat storage industrial steam supply device according to claim 1, wherein the evaporator (9) is connected with a water supply pump (11) and a superheater (8) respectively through pipelines.
4. A solid metal heat storage industrial steam supply device according to claim 3, characterized in that a preheater (10) is arranged between the evaporator (9) and the feed water pump (11).
5. A solid metal heat storage industrial steam supply device according to claim 3, characterized in that a steam drum is arranged between the evaporator (9) and the superheater (8).
6. The solid metal heat storage industrial steam supply device according to claim 1, wherein the fan (7) is a high temperature resistant variable frequency fan.
7. The solid metal heat storage industrial steam supply device according to claim 1, wherein the heat storage body heat insulation layer (6) is an aluminum silicate heat insulation layer, and a protection plate is arranged outside the heat storage body heat insulation layer.
8. The solid metal heat storage industrial steam supply device according to claim 1, wherein the metal heat storage column (4) is any one or combination of cast iron, cast steel, pig iron, wrought iron, carbon steel and other materials.
9. The solid metal heat storage industrial steam supply device according to claim 1, wherein the air heating device (2) is one of an electric heating pipe, an electric heating wire and an electric heating sheet.
10. A method for supplying industrial steam based on the solid metal heat storage industrial steam supply device according to any one of claims 1 to 9, characterized by comprising the following steps:
s1: closing the air duct baffle (3), and supplying electric energy to the air heating device (2) by an external power supply through the power distribution cabinet (1), wherein the air heating device (2) converts the electric energy into self heat energy;
s2: the heat of the air heating device (2) is transferred to the low-temperature air through heat conduction, heat convection and heat radiation, and the low-temperature air is heated to a set temperature;
s3: the heated air transfers heat to the metal heat storage column body (4) through natural convection and heat conduction, and the metal heat storage column body (4) stores the heat after heating;
s4: closing a power supply of an air heating device (2) in the power distribution cabinet, opening an air duct baffle (3) and a fan (7), and carrying out forced convection heat exchange on cold air in an air duct (5) through a metal heat storage column (4), wherein the metal heat storage column (4) heats the cold air in the air duct (5);
s5: continuing the heat exchange process of S4, and after air circulates between the air duct (5) and the metal heat storage column (4) for a period of time, enabling the air in the air duct (5) to reach a preset temperature;
s6: the low-temperature water supply of the external water supply system is pressurized by a water supply pump (11), the low-temperature water supply is changed into high-temperature water supply by a preheater (10), then is changed into saturated steam by an evaporator (9), and finally is changed into superheated steam meeting the demands of users by heating by a superheater (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310344370.6A CN116294739A (en) | 2023-03-31 | 2023-03-31 | Solid metal heat storage industrial steam supply device and industrial steam supply method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310344370.6A CN116294739A (en) | 2023-03-31 | 2023-03-31 | Solid metal heat storage industrial steam supply device and industrial steam supply method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116294739A true CN116294739A (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310344370.6A Pending CN116294739A (en) | 2023-03-31 | 2023-03-31 | Solid metal heat storage industrial steam supply device and industrial steam supply method |
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| Country | Link |
|---|---|
| CN (1) | CN116294739A (en) |
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- 2023-03-31 CN CN202310344370.6A patent/CN116294739A/en active Pending
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