A clean energy heating system with hot water and steam

Abstract

The utility model discloses a kind of clean energy heating system with hot water and steam, including solar heat collector, heat storage device, mixing heater and steam user terminal connected in turn on steam delivery pipeline;The utility model improves the output stability of system by coupling solar heat collector and electric heating conversion device, and heat storage device and hot water storage tank, when hot water or steam demand fluctuates, demand response can be realized by internal regulation and control of system, reduce the demand of external heat source, make the coupling degree between hot water and steam higher, improve clean energy heating efficiency under the scene of hot water and steam simultaneous demand.

Description

Technical Field

[0001] This utility model belongs to the field of clean heating technology, and in particular relates to a clean energy heating system that can supply both hot water and steam. Background Technology

[0002] Clean heating is a heating method that achieves low emissions and low energy consumption through efficient energy systems, significantly reducing energy loss. It mainly includes clean energy sources such as geothermal, solar, biomass, natural gas, and electricity. These energy sources can all be obtained from renewable resources, reducing dependence on traditional energy sources and possessing high environmental protection attributes.

[0003] Over the past five years, the market size and growth rate of the clean energy heating industry have been steadily increasing. During this period, with the increasing emphasis on environmental protection and sustainable development, the clean heating industry has experienced rapid growth. The market size has expanded year by year, and various clean energy heating projects, such as solar energy and geothermal energy, have gradually replaced traditional coal-fired heating methods and become the mainstream.

[0004] During this period, the clean heating industry maintained a high growth rate, making a positive contribution to the optimization of the energy structure and environmental protection. However, at the same time, clean energy, compared with traditional energy, has the characteristics of instability and cyclical changes, which creates a natural contradiction with heat load. Although increasing thermal storage and coupling multiple energy sources can alleviate this contradiction to some extent, the heating efficiency of clean energy is not high in complex heating scenarios, especially in scenarios where multiple heat forms such as hot water and steam are required. Summary of the Invention

[0005] The purpose of this invention is to provide a clean energy heating system that can supply both hot water and steam, in order to solve the problem of low efficiency of clean energy heating in scenarios where hot water and steam are needed simultaneously.

[0006] The present invention adopts the following technical solution: a clean energy heating system that can supply both hot water and steam, comprising a solar thermal collector, a thermal storage device, a mixing heater and a steam user terminal connected in sequence to a steam transmission pipeline;

[0007] Solar thermal collectors are used to heat steam and generate high-temperature steam by utilizing solar radiation energy when solar energy is abundant, and then the high-temperature steam is transported to the steam user terminal through steam transmission pipelines.

[0008] The thermal storage device is used to store the thermal energy of steam from the steam transmission pipeline, and to use the stored thermal energy to heat water and generate steam when steam is insufficient. The steam is then delivered to the steam user terminal through the steam bidirectional pipeline and the steam transmission pipeline.

[0009] The mixing heater is used to introduce high-temperature steam from the steam delivery pipeline into it and mix it with the cold source in the mixing heater before outputting high-temperature water to the hot water user terminal.

[0010] It also includes: an electrothermal conversion device, a hot water storage tank, and a hot water user terminal, which are connected in sequence to the hot water main pipeline;

[0011] The electrothermal conversion device is used to heat water using electrical energy during off-peak hours and deliver the hot water to the hot water user terminal;

[0012] Hot water storage tanks are used to introduce and store hot water when there is sufficient hot water, and during peak electricity periods, the hot water stored inside is sequentially transported to the hot water user terminal through the hot water bidirectional pipeline and the hot water main pipeline.

[0013] Furthermore, it also includes a compensation pipeline that connects the outlet of the electrothermal conversion device to the bidirectional cold port of the thermal storage device. In this case, the electrothermal conversion device is also used to provide high-temperature water to the thermal storage device when steam is insufficient, thereby enabling the thermal storage device to produce steam and compensate for the insufficient steam.

[0014] Furthermore, it also includes a compensation pipeline that connects the outlet of the electrothermal conversion device to the inlet of the solar collector; at this time, the electrothermal conversion device is also used to provide high-temperature water to the solar collector when steam is insufficient, thereby enabling the solar collector to produce steam and compensate for the insufficient steam.

[0015] Furthermore, it also includes a compensation pipeline that connects the outlet of the hot water storage tank to the inlet of the solar collector; at this time, the hot water storage tank is also used to provide high-temperature water to the solar collector when steam is insufficient, thereby enabling the solar collector to produce steam and compensate for the insufficient steam.

[0016] Furthermore, it also includes a compensation pipeline that connects the outlet of the hot water storage tank to the bidirectional cold port of the thermal storage device; at this time, the hot water storage tank is also used to provide high-temperature water to the thermal storage device when steam is insufficient, thereby enabling the thermal storage device to produce steam and compensate for the insufficient steam.

[0017] Furthermore, it also includes a return water pipeline that connects the bidirectional cold port of the thermal storage device to the working fluid inlet of the solar collector.

[0018] The beneficial effects of this utility model are:

[0019] This invention improves the output stability of the system by coupling a solar thermal collector and an electrothermal conversion device, as well as a thermal storage device and a hot water storage tank. When the demand for hot water or steam fluctuates, the system can respond to the demand through internal regulation, reduce the demand for external heat sources, and make the coupling between hot water and steam higher, thereby improving the efficiency of clean energy heating in scenarios where hot water and steam are in demand at the same time.

[0020] This invention can mitigate the fluctuations and instabilities of solar energy and off-peak electricity, thereby improving the stability of the system's external heating. Compared with current methods such as coal, gas, and biomass, using solar energy and off-peak electricity as heat sources significantly reduces carbon emissions. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] The components include: 1. Solar thermal collector; 2. Thermal storage device; 3. Electrothermal conversion device; 4. Hot water storage tank; 5. Mixing heater; 6. Steam transmission pipeline; 7. Steam bidirectional pipeline; 8. Hot water main pipeline; 9. Hot water bidirectional pipeline; 11. First valve; 12. Second valve; 13. Third valve; 14. Fourth valve; 15. Fifth valve; 16. Sixth valve; 17. Seventh valve; 18. Eighth valve. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more. The term "orientation" in this utility model refers to the orientation of the utility model within the... Figure 1 Description of the state's progression.

[0025] This utility model discloses a clean energy heating system that can supply both hot water and steam, such as Figure 1As shown, it includes a solar thermal collector 1, a thermal storage device 2, a mixing heater 5, and a steam user terminal, which are connected in sequence to the steam transmission pipeline 6.

[0026] The solar thermal collector 1 is used to heat steam and generate high-temperature steam by utilizing solar radiation energy when solar energy is abundant, and then the high-temperature steam is transported to the steam user terminal through the steam transmission pipeline 6.

[0027] The heat storage device 2 is used to store the heat energy of steam from the steam transmission pipeline 6, and to use the stored heat energy to heat water and generate steam when steam is insufficient, and then to transport the steam to the steam user terminal through the steam bidirectional pipeline 7 and the steam transmission pipeline 6 in sequence.

[0028] The connection relationship between the solar collector 1, the heat storage device 2, the mixing heater 5 and the steam transmission pipeline 6 is as follows: the working fluid outlet of the solar collector 1 is connected to the steam transmission pipeline 6, the bidirectional heat port of the heat storage device 2 is connected to the steam transmission pipeline 6 through the bidirectional steam pipeline 7, and the steam transmission pipeline 6 is connected to the steam user terminal.

[0029] The mixing heater 5 is used to introduce high-temperature steam from the steam delivery pipeline 6 into it and mix it with the cold source in the mixing heater 5 before outputting high-temperature water to the hot water user terminal.

[0030] This utility model also includes: an electrothermal conversion device 3, a hot water storage tank 4, and a hot water user terminal, which are sequentially connected to the hot water main pipeline 8.

[0031] The electrothermal conversion device 3 is used to heat water using electrical energy during off-peak hours and deliver the hot water to the hot water user terminal; the hot water storage tank 4 is used to introduce hot water into it for storage when there is sufficient hot water, and deliver the hot water stored in it to the hot water user terminal in sequence through the hot water bidirectional pipeline 9 and the hot water main pipeline 8 during peak hours.

[0032] The outlet of the electrothermal conversion device 3 is connected to the hot water main pipeline 8, the bidirectional port of the hot water storage tank 4 is connected to the hot water main pipeline 8 through the hot water bidirectional pipeline 9, and the hot water main pipeline 8 is connected to the hot water user terminal.

[0033] This utility model also includes a compensation pipeline that connects the outlet of the electrothermal conversion device 3 to the bidirectional cold port of the heat storage device 2. In this case, the electrothermal conversion device 3 is also used to provide high-temperature water to the heat storage device 2 when steam is insufficient, thereby enabling the heat storage device 2 to produce steam and compensate for the insufficient steam.

[0034] This utility model also includes a compensation pipeline that connects the outlet of the electrothermal conversion device 3 to the inlet of the solar collector 1; at this time, the electrothermal conversion device 3 is also used to provide high-temperature water to the solar collector 1 when steam is insufficient, thereby enabling the solar collector 1 to produce steam and compensate for the insufficient steam.

[0035] This utility model also includes a compensation pipeline that connects the outlet of the hot water storage tank 4 to the inlet of the solar collector 1; at this time, the hot water storage tank 4 is also used to provide high-temperature water to the solar collector 1 when steam is insufficient, thereby enabling the solar collector 1 to produce steam and compensate for the insufficient steam.

[0036] This utility model also includes a compensation pipeline that connects the outlet of the hot water storage tank 4 to the bidirectional cold port of the heat storage device 2; at this time, the hot water storage tank 4 is also used to provide high-temperature water to the heat storage device 2 when steam is insufficient, thereby enabling the heat storage device 2 to produce steam and compensate for the insufficient steam.

[0037] This utility model also includes a return water pipeline that connects the bidirectional cold port of the thermal storage device 2 to the working fluid inlet of the solar collector 1.

[0038] The temperatures of the steam and hot water in this invention are described below:

[0039] Solar collector 1 converts solar energy into steam at a temperature of 120℃~280℃. Thermal storage device 2 stores the steam heat energy at a temperature of 120℃~280℃. Electrothermal conversion device 3 converts electrical energy into water at a temperature of 60℃~95℃. Hot water storage tank 4 stores water at a temperature of 60℃~95℃. Mixing heater 5 uses steam to heat low-temperature water to produce high-temperature water at a temperature of 60℃~95℃.

[0040] Preferred steam user terminals include: automotive painting workshops with a steam demand of 2-10 t / h; glass quenching workshops with a steam demand of 20-50 t / h; lithium mica hydrolysis workshops in lithium metal refining processes with a steam demand of 10-50 t / h; cooking and setting workshops in textile production processes with a steam demand of 10-100 t / h; saccharification workshops in beer production processes with a steam demand of 20-50 t / h; or centralized heating heat exchange stations with a steam demand of 20-50 t / h.

[0041] For hot water user terminals, the preferred locations are: automotive electrophoresis drying and topcoat drying workshops with hot water demand temperatures of 50~90℃, lithium mica hydrolysis workshops in lithium metal refining processes, scouring and bleaching workshops in textile production processes, fermentation workshops in beer production processes, or centralized heating heat exchange stations.

[0042] The mixing heater 5 is preferably a direct contact mixing heater.

[0043] In some implementations, the solar thermal collector 1 can be composed of several collector units connected in series to achieve gradual heat accumulation and reach a higher temperature.

[0044] In some implementations, the solar thermal collector 1 is composed of several collector units connected in parallel to improve the utilization rate of a single collector unit and to make the water temperature more stable.

[0045] In some embodiments, the solar thermal collector 1 consists of several collector units connected in series and parallel. That is, multiple collector units are connected in parallel, and then the parallel collector units are connected in series, or multiple collector units are connected in series, and then the series-connected collector units are connected in parallel. Using a series-parallel connection method can combine the advantages of both series and parallel connections.

[0046] In some implementations, the heat collection unit is a trough heat collection unit or a Fresnel heat collection unit.

[0047] In some embodiments, the heat storage device 2 is a solid concrete heat storage unit, which includes a solid heat storage medium cast into a cuboid shape and a plurality of parallel steel pipes, wherein the plurality of parallel steel pipes are embedded in the solid heat storage medium.

[0048] In some embodiments, the electrothermal conversion device 3 is an electric boiler, heat pump, or other equipment that can convert electrical energy into thermal energy.

[0049] This invention utilizes a solar thermal collector 1 to directly convert the feed water and return water from the heat storage device 2 into steam for external heating during periods of good solar energy, with excess steam stored in the heat storage device 2; it also utilizes an electrothermal conversion device 3 to convert the feed water and return water into hot water for external heating during off-peak hours using inexpensive electricity, with excess hot water stored in a hot water storage tank 4.

[0050] This invention addresses the frequently changing demands for steam and hot water by coupling a solar collector 1, a thermal storage device 2, an electrothermal conversion device 3, and a hot water storage tank 4. When steam demand increases, the high-temperature water stored in the hot water storage tank 4 enters the solar collector 1, raising the water temperature at the working fluid inlet and generating more steam. When hot water demand increases, the steam generated by the solar collector 1 mixes with cold water in a mixing heater 5, producing more hot water. Since both off-peak electricity and solar energy are cyclical, the thermal storage configuration ensures a continuous supply of steam and hot water.

[0051] The specific operating mode of this utility model is as follows:

[0052] Mode 1: During periods of abundant solar energy, open valves 11 and 12 to heat water into steam using solar collector 1. The excess steam, besides meeting the steam supply requirements of end-users, is stored in thermal storage device 2. During off-peak hours with abundant electricity, valves 16 and 17 can be opened to heat water into hot water using electrothermal conversion device 3. The excess hot water, besides meeting the hot water requirements of end-users, is stored in hot water storage tank 4.

[0053] Mode 2: During periods of abundant solar energy and off-peak electricity, when the steam generated by solar energy and the hot water generated by off-peak electricity meet the needs of normal use, open the first valve 11 and the sixth valve 16, close the remaining valves, and directly use the solar collector 1 to heat the water into steam and the electrothermal conversion device 3 to heat the water into hot water, supplying steam and hot water to the outside respectively.

[0054] Mode 3: During periods of low solar energy availability and abundant off-peak electricity, open valves 12, 14, and 16, and close the other valves. Utilize the heat storage device 2 to release heat, heating the water into steam to meet external steam supply needs; and utilize the electrothermal conversion device 3 to heat the feedwater into hot water to meet external hot water supply needs.

[0055] Mode 4: During periods of low solar energy availability and off-peak electricity demand, solar collector 1 and electrothermal conversion device 3 cannot operate. Opening the second valve 12, fourth valve 14, and seventh valve 17 utilizes the heat storage device 2 and hot water storage tank 4 to release heat, heating the water into steam and hot water respectively, thus meeting the external steam and hot water supply needs.

[0056] Mode 5: If the steam supply is still insufficient under any of the operating conditions of Modes 1 to 4, open the first valve 11, the second valve 12, the fourth valve 14, the fifth valve 15, and the sixth valve 16 to use the hot water produced in the electrothermal conversion device 3 to enter the solar collector device 1 and the high-temperature heat storage device 2, thereby increasing the steam output and meeting the external steam supply requirements.

[0057] If the hot water supplied by the electrothermal conversion device 3 is insufficient, the hot water in the hot water storage tank 4 can be introduced into the solar collector device 1 and the high-temperature heat storage device 2 by opening the seventh valve 17 to meet the external steam supply.

[0058] Mode 6: When the hot water supply is still insufficient under any of the operating conditions of Modes 1 to 4, open the first valve 11, the third valve 13 and the eighth valve 18, and use the steam generated by the solar collector 1 to enter the mixing heater 5, mix with the supply water and return water to make hot water, increase the hot water production, and meet the external hot water supply.

[0059] Alternatively, the first valve 11, the second valve 12, the third valve 13, the fourth valve 14, and the eighth valve 18 can be opened to allow the steam generated by the solar collector 1 and the heat storage device 2 to enter the mixing heater 5, mix with water to produce hot water, increase the hot water output, and meet the external hot water supply needs.

[0060] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clean energy heating system that can supply both hot water and steam, characterized in that, It includes a solar collector (1), a heat storage device (2), a mixing heater (5), and a steam user terminal, which are connected in sequence to the steam transmission pipeline (6); The solar thermal collector (1) is used to heat steam and generate high-temperature steam by utilizing solar radiation energy when solar energy is abundant, so that the high-temperature steam can be transported to the steam user terminal through the steam transmission pipeline (6). The heat storage device (2) is used to store the heat energy of steam from the steam transmission pipeline (6), and use the stored heat energy to heat water and generate steam when steam is insufficient, and then transport the steam to the steam user terminal through the steam bidirectional pipeline (7) and the steam transmission pipeline (6) in sequence. The mixing heater (5) is used to introduce high-temperature steam from the steam transmission pipeline (6) into it and mix it with the cold source in the mixing heater (5) before outputting high-temperature water to the hot water user terminal. It also includes: an electrothermal conversion device (3), a hot water storage tank (4), and a hot water user terminal, which are connected in sequence to the hot water main pipeline (8); The electrothermal conversion device (3) is used to heat water using electrical energy during off-peak hours and deliver the hot water to the hot water user terminal; The hot water storage tank (4) is used to introduce hot water into it for storage when there is sufficient hot water, and to transport the hot water stored in it to the hot water user terminal through the hot water bidirectional pipeline (9) and the hot water main pipeline (8) in sequence during peak electricity periods.

2. A clean energy heating system that combines hot water and steam supply according to claim 1, characterized in that, It also includes a compensation pipeline that connects the outlet of the electrothermal conversion device (3) to the bidirectional cold port of the heat storage device (2). In this case, the electrothermal conversion device (3) is also used to provide high-temperature water to the heat storage device (2) when there is insufficient steam, so that the heat storage device (2) can produce steam and compensate for the insufficient steam.

3. A clean energy heating system that provides both hot water and steam according to claim 1, characterized in that, It also includes a compensation pipeline that connects the outlet of the electrothermal conversion device (3) to the inlet of the solar collector (1); at this time, the electrothermal conversion device (3) is also used to provide high-temperature water to the solar collector (1) in the case of insufficient steam, so that the solar collector (1) can produce steam and compensate for the insufficient steam.

4. A clean energy heating system that combines hot water and steam supply according to claim 1, characterized in that, It also includes a compensation pipeline that connects the outlet of the hot water storage tank (4) to the inlet of the solar collector (1); at this time, the hot water storage tank (4) is also used to provide high-temperature water to the solar collector (1) in the case of insufficient steam, so that the solar collector (1) can produce steam and compensate for the insufficient steam.

5. A clean energy heating system that combines hot water and steam supply according to claim 1, characterized in that, It also includes a compensation pipeline that connects the outlet of the hot water storage tank (4) to the bidirectional cold port of the heat storage device (2); at this time, the hot water storage tank (4) is also used to provide high-temperature water to the heat storage device (2) when there is insufficient steam, so that the heat storage device (2) can produce steam and compensate for the insufficient steam.

6. A clean energy heating system that combines hot water and steam supply according to claim 1, characterized in that, It also includes a return water pipeline that connects the bidirectional cold port of the thermal storage device (2) to the working fluid inlet of the solar collector (1).

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