CN213930860U - Solar heat collection type steam generation system - Google Patents

Solar heat collection type steam generation system Download PDF

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Publication number
CN213930860U
CN213930860U CN202022827043.0U CN202022827043U CN213930860U CN 213930860 U CN213930860 U CN 213930860U CN 202022827043 U CN202022827043 U CN 202022827043U CN 213930860 U CN213930860 U CN 213930860U
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China
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water
steam
solar
heat
main pipe
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CN202022827043.0U
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李民强
胡德军
纪海兵
张庆虎
陈涛
范菊红
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Weifang Beihai Thermal Power Co ltd
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Weifang Beihai Thermal Power Co ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/44Heat exchange systems

Abstract

The utility model discloses a solar heat collection type steam generation system which is arranged on a water supply pipeline and comprises a solar heat collector, a steam-water separation device and a steam storage device; a solar water inlet main pipe is connected between a water inlet at the bottom end of the solar heat collector and a water inlet of a water supply pipeline, a solar water supply pump is arranged on the solar water inlet main pipe, a water outlet at the top end of the solar heat collector is connected with a water inlet of a steam-water separation device, a gas outlet of the steam-water separation device is connected with a steam storage device, a water outlet of the steam-water separation device is connected with a high-temperature water return main pipe, and the high-temperature water return main pipe is also connected to a water outlet of the water supply pipeline; the utility model has the advantages of simple structure and reasonable system design, convenient to use reforms transform low cost, can make full use of solar heat, not only can use as the heat collector and carry out the temperature, can regard as steam generator to use moreover and produce steam, application range is extensive, and market value is wider.

Description

Solar heat collection type steam generation system
Technical Field
The utility model belongs to the technical field of the solar photothermal application, especially, relate to a solar energy collection formula steam generation system.
Background
Solar energy is the most ideal, commercial development value-possessing and relatively mature new energy technology at present, has the advantages of typical cleanness, no pollution, huge total laying power and inexhaustibility, is an energy scheme vigorously advocated by governments of all countries in the world for developing and utilizing the solar energy, and has important significance for people to walk out of own energy and environmental dilemma.
The technology of the solar heat collecting system is quite mature, the existing solar heat collecting system mainly comprises a heat collecting water tank and an evacuated collector tube or a hot plate, the evacuated collector tube or the hot plate collects solar heat and then heats water in the heat collecting tube, and the water is collected in the water tank through a circulating water heating system and is used by people. Currently, solar heat collection systems are generally only used as water heaters and not as solar steam generators, and thus have limited use.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a solar energy collection formula steam generation system that simple structure, reasonable in design, convenient to use not only can regard as the heat collector to use but also can regard as steam generator to use is provided.
In order to solve the technical problem, the technical scheme of the utility model is that: the solar heat collection type steam generation system is arranged on a water supply pipeline and comprises a solar heat collector, a steam-water separation device and a steam storage device;
a solar water inlet main pipe is connected between a bottom water inlet of the solar heat collector and a water inlet end of the water supply pipeline, a solar water supply pump is arranged on the solar water inlet main pipe, a solar water return branch pipe is also connected on a pipeline between the solar water supply pump and the bottom water inlet of the solar heat collector, the solar water return branch pipe is connected to a water outlet end of the water supply pipeline, a first control valve is arranged on a pipeline communicated between the water inlet end and the water outlet end of the water supply pipeline, and a second control valve is correspondingly arranged at a water inlet of the solar water inlet main pipe;
a water outlet at the top end of the solar thermal collector is connected with a water inlet of the steam-water separation device, a gas outlet of the steam-water separation device is connected with the steam storage device, a third control valve is correspondingly arranged at the gas outlet of the steam-water separation device, a water outlet of the steam-water separation device is connected with a high-temperature water return main pipe, the high-temperature water return main pipe is also connected to a water outlet end of the water supply pipeline, a fourth control valve is correspondingly arranged on the high-temperature water return main pipe, and an internal circulation pipeline is also connected between the water outlet of the steam-water separation device and a water inlet at the bottom end of the solar thermal collector; and a fifth control valve is correspondingly arranged at the air outlet of the steam storage device.
According to a preferable technical scheme, the solar heat collector comprises a mounting frame body, wherein a heat collecting main pipe is arranged on the mounting frame body, a water storage cavity is arranged in the heat collecting main pipe, and a main pipe heat insulation layer is coated on the outer wall of the heat collecting main pipe; be connected with a plurality of settings side by side on the pipe wall of thermal-arrest person in charge and with the thermal-collecting tube of water storage chamber intercommunication, the thermal-collecting tube supports on the installation support body, the bottom water inlet sets up the bottom of thermal-arrest person in charge and with water storage chamber intercommunication, the top delivery port sets up the top of thermal-arrest person in charge and with water storage chamber intercommunication.
According to the preferable technical scheme, the heat collecting tube comprises an outer vacuum glass tube, a pressure-bearing metal steel tube is sleeved in the outer vacuum glass tube, a vacuum cavity is arranged between the outer vacuum glass tube and the pressure-bearing metal steel tube, a selective absorption coating is coated on the outer wall of the pressure-bearing metal steel tube, a connecting seat is fixedly mounted at one end of the outer vacuum glass tube and one end of the pressure-bearing metal steel tube, the connecting seat is mounted on the tube wall of the heat collecting main tube, a heat conducting aluminum rod is sleeved in the pressure-bearing metal steel tube, one end of the heat conducting aluminum rod extends out of the connecting seat and extends into the water storage cavity, a heat storage cavity is arranged between the heat conducting aluminum rod and the pressure-bearing metal steel tube, and a heat conducting medium is arranged in the heat storage cavity.
According to the preferable technical scheme, the heat-conducting medium is heat-conducting fins arranged on the periphery of the heat-conducting aluminum bar, and the outer ends of the heat-conducting fins are connected with the inner wall of the pressure-bearing metal steel pipe.
As a preferable technical scheme, a heat reflection film is arranged on the inner wall of the backlight surface of the vacuum glass outer tube.
As an optimized technical scheme, the top end, the middle part and the bottom end of the heat collection main pipe are respectively provided with a temperature collector, and the temperature collectors are correspondingly connected with a temperature display.
As an optimized technical scheme, a pressure release valve and a pressure gauge are respectively arranged on the steam-water separation device and the steam storage device.
Due to the adoption of the technical scheme, the solar heat collection type steam generation system is arranged on a water supply pipeline and comprises a solar heat collector, a steam-water separation device and a steam storage device; a solar water inlet main pipe is connected between a bottom water inlet of the solar heat collector and a water inlet end of the water supply pipeline, a solar water supply pump is arranged on the solar water inlet main pipe, a solar water return branch pipe is also connected on a pipeline between the solar water supply pump and the bottom water inlet of the solar heat collector, the solar water return branch pipe is connected to a water outlet end of the water supply pipeline, a first control valve is arranged on a pipeline communicated between the water inlet end and the water outlet end of the water supply pipeline, and a second control valve is correspondingly arranged at a water inlet of the solar water inlet main pipe; a water outlet at the top end of the solar thermal collector is connected with a water inlet of the steam-water separation device, a gas outlet of the steam-water separation device is connected with the steam storage device, a third control valve is correspondingly arranged at the gas outlet of the steam-water separation device, a water outlet of the steam-water separation device is connected with a high-temperature water return main pipe, the high-temperature water return main pipe is also connected to a water outlet end of the water supply pipeline, a fourth control valve is correspondingly arranged on the high-temperature water return main pipe, and an internal circulation pipeline is also connected between the water outlet of the steam-water separation device and a water inlet at the bottom end of the solar thermal collector; a fifth control valve is correspondingly arranged at the air outlet of the steam storage device; the utility model has the advantages that: the utility model has the advantages of simple structure and reasonable system design, convenient to use reforms transform low cost, can make full use of solar heat, not only can use as the heat collector and carry out the temperature, can regard as steam generator to use moreover and produce steam, application range is extensive, and market value is wider.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a heat collecting tube according to an embodiment of the present invention;
fig. 3 is a cross-sectional view taken at a-a in fig. 2.
In the figure: 10-water supply pipeline; 11-solar water inlet main pipe; 12-solar water supply pump; 13-solar energy backwater branch pipe; 14-internal circulation pipes; 15-high-temperature water return main pipe; 20-a solar heat collector; 21-mounting a frame body; 22-heat collecting main pipe; 23-vacuum glass outer tube; 24-a pressure-bearing metal steel pipe; 25-vacuum chamber; 26-a selective absorbing coating; 27-a connecting seat; 28-a thermally conductive aluminum bar; 29-heat conducting fins; 210-a heat reflective film; 211-temperature collector; 212-temperature display; 30-a steam-water separation device; 40-a steam storage device; 51-control valve one; 52-control valve two; 53-control valve three; 54-control valve four; 55-control valve five.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1 and 2, the solar heat collection type steam generation system is disposed on a water supply pipeline 10, and includes a solar heat collector 20, a steam-water separation device 30, and a steam storage device 40. A solar water inlet main pipe 11 is connected between a bottom water inlet of the solar heat collector 20 and a water inlet end of the water supply pipeline 10, a solar water supply pump 12 is arranged on the solar water inlet main pipe 11, a solar water return branch pipe 13 is further connected to a pipeline between the solar water supply pump 12 and the bottom water inlet of the solar heat collector 20, the solar water return branch pipe 13 is connected to a water outlet end of the water supply pipeline 10, a first control valve 51 is arranged on a pipeline communicated between the water inlet end and the water outlet end of the water supply pipeline 10, and a second control valve 52 is correspondingly arranged at the water inlet end of the solar water inlet main pipe 11; a water outlet at the top end of the solar heat collector 20 is connected with a water inlet of the steam-water separation device 30, a gas outlet of the steam-water separation device 30 is connected with the steam storage device 40, a control valve III 53 is correspondingly arranged at the gas outlet of the steam-water separation device 30, a water outlet of the steam-water separation device 30 is connected with a high-temperature water return main pipe 15, the high-temperature water return main pipe 15 is further connected to a water outlet end of the water supply pipeline 10, a control valve IV 54 is correspondingly arranged on the high-temperature water return main pipe 15, and an internal circulation pipeline 14 is further connected between a water outlet of the steam-water separation device 30 and a water inlet at the bottom end of the solar heat collector 20; a fifth control valve 55 is correspondingly arranged at the air outlet of the steam storage device 40.
In this embodiment water supply pipe 10 is used for providing the water supply pipe of demineralized water to the boiler in the boiler feedwater preheating system, the utility model discloses a set of independent equipment can regard as the heat collector to use and can regard as steam generator to use again, and concrete analysis is as follows:
when the first control valve 51 is opened, the second control valve 52, the third control valve 53, the fourth control valve 54 and the fifth control valve 55 are closed, the solar water supply pump 12 is not started, and the flow path of the demineralized water is as follows: the water inlet of the water supply pipeline 10 → the first control valve 51 → the water outlet of the water supply pipeline 10, and then enters other equipment or systems, and the system does not operate;
when the second control valve 52 and the third control valve 53 are opened and the first control valve 51, the fourth control valve 54 and the fifth control valve 55 are closed, the solar water supply pump 12 is started, and the flow path of the demineralized water is as follows: the system is used as a steam generator, high-temperature water and steam generated in the solar thermal collector 20 enter the steam-water separation device 30 to be separated, the separated high-temperature steam enters the steam storage device 40 to be stored, the separated high-temperature demineralized water enters the bottom water inlet of the solar thermal collector 20 through the internal circulation pipeline 14, then is mixed with the demineralized water which is not heated, and is heated continuously through the solar thermal collector 20, and because the internal circulation pipeline 14 is additionally arranged, a part of the high-temperature demineralized water is heated repeatedly and circularly, so the temperature raising speed of the demineralized water is high, the steam generation speed is high; here, the solar energy return branch pipe 13 also serves as a flow valve, when demineralized water is provided into the solar energy heat collector 20, in order to avoid an excessive pressure in a pipe network, when the flow rate in the pipe network of the system is sufficient, the excessive flow rate can enter the water outlet of the water supply pipeline 10 through the solar energy return branch pipe 13; in this state, the system is an independent steam generating device, and can be used as a testing device at the same time, an independent test is carried out by using the demineralized water flowing in the water supply pipeline for measuring the steam generating efficiency, then the device is maintained and improved, when the system needs to be maintained, the first control valve 51 is opened, the second control valve 52, the third control valve 53, the fourth control valve 54, the fifth control valve 55 and the solar water supply pump 12 are closed, and at the moment, no water is supplied to the system;
when the second control valve 52 and the fourth control valve 54 are opened and the first control valve 51, the third control valve 53 and the fifth control valve 55 are closed, the solar water supply pump 12 is started, and the flow path of the demineralized water is as follows: the system comprises a water inlet of a water supply pipeline 10 → a solar water inlet main pipe 11 → a solar water supply pump 12 → a control valve II 52 → a water inlet at the bottom end of a solar heat collector 20 → a water outlet at the top end of the solar heat collector 20 → a steam-water separation device 30 → a control valve IV 54 → a high-temperature water return main pipe 15 → outlet water of the water supply pipeline 10, and is used as a heat collector, demineralized water entering the solar heat collector 20 is heated, the steam-water separation device 30 separates the high-temperature water and then passes through the high-temperature water return main pipe, and steam is discharged through pressure relief, and when a control valve III 53 is opened, the steam is recovered, so that the system can be used as the heat collector and a steam generator at the same time;
the steam is stored in the steam storage device 40, and the steam can be conveyed to a designated position for standby through a pipeline by controlling the opening degree of the control valve five 55. A plurality of sets of the systems are connected in parallel, so that the gas production can be increased to provide energy for high-power steam equipment.
The utility model has the advantages of simple structure and reasonable system design, convenient to use reforms transform low cost, can make full use of solar heat, not only can use as the heat collector and carry out the temperature, can regard as steam generator to use moreover and produce steam, application range is extensive, and market value is wider.
Referring to fig. 1, the solar heat collector 20 includes a mounting frame body 21, a heat collecting main pipe 22 is arranged on the mounting frame body 21, a water storage cavity is arranged in the heat collecting main pipe 22, a main pipe heat insulation layer is coated on the outer wall of the heat collecting main pipe 22, and the main pipe heat insulation layer is used for avoiding heat dissipation; be connected with a plurality of settings side by side on the pipe wall of thermal-arrest person in charge 22 and with the thermal-collecting tube of water storage chamber intercommunication, the thermal-collecting tube supports on the installation support body 21, the bottom water inlet sets up the bottom of thermal-arrest person in charge 22 and with the water storage chamber intercommunication, the top delivery port sets up the top of thermal-arrest person in charge 22 and with the water storage chamber intercommunication. The installation of the heat collecting tube is the prior art, and is well known to the ordinary engineering technicians in the field, and is not described herein again.
Referring to fig. 2, the heat collecting tube includes an outer vacuum glass tube 23, a pressure-bearing metal steel tube 24 is sleeved inside the outer vacuum glass tube 23, a vacuum cavity 25 is disposed between the outer vacuum glass tube 23 and the pressure-bearing metal steel tube 24, a selective absorption coating 26 is coated on an outer wall of the pressure-bearing metal steel tube 24, the selective absorption coating 26 is used for improving absorption capacity of a heat absorber for solar radiation energy and reducing capacity of the heat absorber for scattering to the environment, and the selective absorption coating 26 is prior art, is known by ordinary engineering technicians in the field, and is not described herein again. The vacuum glass outer tube 23 and one end of the pressure-bearing metal steel tube 24 are fixedly provided with a connecting seat 27, the connecting seat 27 is installed on the tube wall of the heat collection main tube 22, the pressure-bearing metal steel tube 24 is internally sleeved with a heat-conducting aluminum bar 28, one end of the heat-conducting aluminum bar extends out of the connecting seat 27 and extends into the water storage cavity, a heat storage cavity is arranged between the heat-conducting aluminum bar 28 and the pressure-bearing metal steel tube 24, and a heat-conducting medium is arranged in the heat storage cavity. The all-glass vacuum heat collecting tube in the prior art is made of glass, the probability of damage when the all-glass vacuum heat collecting tube is placed outdoors is high, particularly, in the operation process, after one tube is damaged, the whole system cannot work continuously, in the embodiment, the pressure-bearing metal steel tube 24 is sleeved in the vacuum glass outer tube 23 to form the glass-metal heat collecting tube, the service life is long, the pressure-bearing metal steel tube 24 is better in pressure-bearing effect and better in use safety compared with the glass tube, and after the vacuum glass outer tube 23 is damaged, the glass-metal heat collecting tube cannot be leaked, and the system is stable.
The heat-conducting medium is heat-conducting fins 29 arranged on the periphery of the heat-conducting aluminum bar 28, and the outer ends of the heat-conducting fins 29 are connected with the inner wall of the pressure-bearing metal steel pipe 24. The heat conducting fins 29 are aluminum sheets, and are used for quickly and efficiently transferring the heat of the pressure-bearing metal steel pipe 24 to the heat conducting aluminum bars 28.
Referring to fig. 3, a heat reflection film 210 is disposed on the inner wall of the backlight surface of the vacuum glass outer tube 23. The backlight surface refers to a part on which sunlight cannot directly irradiate, the heat reflecting film 210 has a reflecting effect, and the heat reflecting film has the effect that the sunlight can be reflected to the backlight surface of the pressure-bearing metal steel pipe 24 through reflection, and the heat is further conducted towards the surface of the pressure-bearing metal steel pipe according to the direction of an arrow in fig. 3, so that the heat conduction efficiency is further improved. If not provided with heat reflective film 210, then some sunlight shines behind the backlight face can directly pierce through vacuum glass outer tube 23, can't reflect to the backlight face of pressure-bearing metal steel pipe 24, has some sunlight promptly and can't be absorbed by pressure-bearing metal steel pipe 24 and utilize, and the utility model discloses owing to add heat reflective film 210 for heat utilization obtains improving, even gets the water storage intracavity water can be faster the raising the temperature form steam.
The top, the middle part, the bottom of the thermal-arrest main pipe 22 are provided with temperature collector 211 respectively, temperature collector 211 corresponds and is connected with temperature display 212, and temperature display 212 installs on installation support body 21. The temperature collector 211 is used for collecting and measuring the temperature in the water storage cavity, and the temperature is displayed in real time through the temperature display 212, so that the observation of workers is facilitated.
And a pressure release valve and a pressure gauge are respectively arranged on the steam-water separation device 30 and the steam storage device 40. Because this system produces behind the steam pressure can increase, for improve equipment's security, increase the relief valve to show pressure in real time through the manometer, be favorable to the staff to observe.
The steam-water separator 30 is a steam-water separator, is a prior art, is well known to those skilled in the art, and is not described herein.
The steam storage device 40 is a gas storage bag, which is known in the art and known to those skilled in the art, and will not be described herein.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. Solar energy collection formula steam generation system sets up on water supply pipe, its characterized in that: comprises a solar heat collector, a steam-water separation device and a steam storage device;
a solar water inlet main pipe is connected between a bottom water inlet of the solar heat collector and a water inlet end of the water supply pipeline, a solar water supply pump is arranged on the solar water inlet main pipe, a solar water return branch pipe is also connected on a pipeline between the solar water supply pump and the bottom water inlet of the solar heat collector, the solar water return branch pipe is connected to a water outlet end of the water supply pipeline, a first control valve is arranged on a pipeline communicated between the water inlet end and the water outlet end of the water supply pipeline, and a second control valve is correspondingly arranged at a water inlet of the solar water inlet main pipe;
a water outlet at the top end of the solar thermal collector is connected with a water inlet of the steam-water separation device, a gas outlet of the steam-water separation device is connected with the steam storage device, a third control valve is correspondingly arranged at the gas outlet of the steam-water separation device, a water outlet of the steam-water separation device is connected with a high-temperature water return main pipe, the high-temperature water return main pipe is also connected to a water outlet end of the water supply pipeline, a fourth control valve is correspondingly arranged on the high-temperature water return main pipe, and an internal circulation pipeline is also connected between the water outlet of the steam-water separation device and a water inlet at the bottom; and a fifth control valve is correspondingly arranged at the air outlet of the steam storage device.
2. The solar thermal steam generation system of claim 1, wherein: the solar heat collector comprises a mounting frame body, wherein a heat collecting main pipe is arranged on the mounting frame body, a water storage cavity is arranged in the heat collecting main pipe, and a main pipe heat insulation layer is coated on the outer wall of the heat collecting main pipe; be connected with a plurality of settings side by side on the pipe wall of thermal-arrest person in charge and with the thermal-collecting tube of water storage chamber intercommunication, the thermal-collecting tube supports on the installation support body, the bottom water inlet sets up the bottom of thermal-arrest person in charge and with water storage chamber intercommunication, the top delivery port sets up the top of thermal-arrest person in charge and with water storage chamber intercommunication.
3. The solar thermal steam generation system of claim 2, wherein: the heat collecting tube comprises an outer vacuum glass tube, a pressure-bearing metal steel tube is sleeved inside the outer vacuum glass tube, a vacuum cavity is arranged between the outer vacuum glass tube and the pressure-bearing metal steel tube, a selective absorption coating is coated on the outer wall of the pressure-bearing metal steel tube, a connecting seat is fixedly mounted at one end of the outer vacuum glass tube and one end of the pressure-bearing metal steel tube, the connecting seat is mounted on the tube wall of the heat collecting main tube, one end of the inner pressure-bearing metal steel tube is sleeved with a heat conducting aluminum rod, the outer end of the connecting seat extends to the inside of the water storage cavity, a heat storage cavity is arranged between the heat conducting aluminum rod and the pressure-bearing metal steel tube, and a heat conducting medium is arranged in the heat storage cavity.
4. A solar thermal steam generation system according to claim 3, wherein: the heat-conducting medium is heat-conducting fins arranged on the periphery of the heat-conducting aluminum bar, and the outer ends of the heat-conducting fins are connected with the inner wall of the pressure-bearing metal steel pipe.
5. A solar thermal steam generation system according to claim 3, wherein: and a heat reflection film is arranged on the inner wall of the backlight surface of the vacuum glass outer tube.
6. The solar thermal steam generation system of claim 2, wherein: the top, the middle part and the bottom of the heat collection main pipe are respectively provided with a temperature collector, and the temperature collectors are correspondingly connected with temperature displays.
7. The solar thermal collection steam generation system of any one of claims 1 to 6, wherein: and the steam-water separation device and the steam storage device are respectively provided with a pressure release valve and a pressure gauge.
CN202022827043.0U 2020-11-30 2020-11-30 Solar heat collection type steam generation system Active CN213930860U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022827043.0U CN213930860U (en) 2020-11-30 2020-11-30 Solar heat collection type steam generation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022827043.0U CN213930860U (en) 2020-11-30 2020-11-30 Solar heat collection type steam generation system

Publications (1)

Publication Number Publication Date
CN213930860U true CN213930860U (en) 2021-08-10

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Application Number Title Priority Date Filing Date
CN202022827043.0U Active CN213930860U (en) 2020-11-30 2020-11-30 Solar heat collection type steam generation system

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Country Link
CN (1) CN213930860U (en)

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