A system for supplying steam and heat by comprehensive energy
The integrated energy steam and heating system, which combines solar collectors with high-temperature heat pumps and biomass boilers, solves the problems of high carbon emissions and high costs associated with fossil fuel boilers. It achieves efficient utilization of solar and biomass energy, reduces carbon emissions, and lowers steam supply costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-09
AI Technical Summary
The current supply of steam and high-temperature hot water in industrial and civil sectors mainly relies on fossil fuel boilers, resulting in high carbon emissions and high costs. Solar energy and biomass energy have not been rationally utilized in areas with abundant resources.
An integrated energy steam and heating system combining solar collectors, high-temperature heat pumps, and biomass boilers is used to produce medium-temperature water through solar collectors, raise the temperature through high-temperature heat pumps, and produce steam through biomass boilers. This achieves energy gradient heating, reduces biomass consumption, and improves efficiency.
In regions rich in solar and biomass energy, we can reduce carbon emissions, improve energy efficiency, lower steam supply costs, and address steam demand.
Smart Images
Figure CN224340101U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of carbon emission reduction, and in particular relates to a system for integrated energy supply of steam and heat. Background Technology
[0002] Steam and high-temperature hot water supply in industrial and residential sectors primarily relies on fossil fuel boilers (such as coal-fired and gas-fired boilers) or electric heating equipment. These systems have significant drawbacks: high carbon emissions: the combustion of fossil fuels directly releases large amounts of greenhouse gases such as CO2 and sulfides, making it difficult to meet emission reduction requirements under the "dual carbon" target, and they are also costly. Solar and biomass energy have lower carbon emissions, but in areas with relatively abundant solar and biomass resources, such as rural and mountainous areas, these resources are not being utilized effectively.
[0003] How to comprehensively utilize solar and biomass energy to produce steam has become a concern for technicians. Utility Model Content
[0004] Existing technologies present the challenge of how to comprehensively utilize solar and biomass energy to produce steam.
[0005] To address the aforementioned technical problems, according to some embodiments, this application provides an integrated energy steam and heat supply system, including: a solar collector, a high-temperature heat pump, and a biomass boiler;
[0006] The solar collector is used to heat the water supply using solar energy to prepare medium-temperature water, and its first water inlet is connected to the water supply pipeline;
[0007] The high-temperature heat pump is used to prepare high-temperature water from medium-temperature water.
[0008] The biomass boiler is used to generate steam from high-temperature water using biomass energy.
[0009] The medium-temperature water from the first water outlet of the solar collector is divided into at least two branches. One branch enters the evaporator of the high-temperature heat pump to release heat and then returns to the first water inlet of the solar collector. The other branch enters the condenser of the high-temperature heat pump to absorb heat and then enters the biomass boiler.
[0010] Furthermore, the high-temperature heat pump includes an evaporator, a compressor, a condenser, and a throttling valve connected in a cycle;
[0011] The first water outlet of the solar collector is connected to the second water inlet of the evaporator, and the second water outlet of the evaporator is connected to the first water inlet of the solar collector.
[0012] The first water outlet of the solar collector is also connected to the third water inlet of the condenser, and the third water outlet of the condenser is connected to the fourth water inlet of the biomass boiler.
[0013] Furthermore, the third water outlet of the condenser is also connected to an external heating pipeline.
[0014] Furthermore, a circulating water pump is provided between the second water outlet of the evaporator and the first water inlet of the solar collector.
[0015] Furthermore, a water pump is installed on the water supply pipeline.
[0016] Furthermore, a first valve is provided between the first water outlet of the solar collector and the second water inlet of the evaporator;
[0017] A second valve is provided between the first water outlet of the solar collector and the third water inlet of the condenser.
[0018] The above-mentioned technical solution of this utility model has at least the following beneficial technical effects:
[0019] Solar collectors coupled with high-temperature heat pumps provide high-temperature water to biomass boilers, reducing biomass consumption. High-temperature heat pumps can improve energy utilization efficiency, and solar collectors and biomass boilers can reduce carbon emissions. In areas with relatively abundant solar energy and biomass, they can effectively meet the demand for steam. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application or in the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of an integrated energy steam and heat supply system according to one embodiment of this application.
[0022] in, Figure 1 The correspondence between the reference numerals and component names in the attached drawings is as follows:
[0023] 1. Solar collector; 2. Evaporator; 3. Condenser; 4. Compressor; 5. Throttling valve; 6. Biomass boiler; 7. Circulating water pump; 8. Feed water pump; 9. First valve; 10. Second valve.
[0024] 11. First water inlet; 12. First water outlet; 21. Second water inlet; 22. Second water outlet; 31. Third water inlet; 32. Third water outlet; 61. Fourth water inlet. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are presented in the various embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.
[0026] One embodiment of this application provides a system for integrated energy supply of steam and heat, such as... Figure 1 As shown, the system specifically includes: a solar collector 1, a high-temperature heat pump, and a biomass boiler 6;
[0027] The solar collector 1 absorbs the heat from solar energy to heat the water supply and prepare medium-temperature water. Its first water inlet 11 is connected to the water supply pipeline, and the water supply can be at room temperature.
[0028] The high-temperature heat pump further increases the temperature of the medium-temperature water produced by the solar collector 1 to produce high-temperature water.
[0029] The biomass boiler 6 is used to generate steam from high-temperature water using biomass energy.
[0030] The medium-temperature water from the first water outlet 12 of the solar collector 1 is divided into at least two branches. One branch enters the evaporator 2 of the high-temperature heat pump to release heat and then returns to the first water inlet 11 of the solar collector 1. The other branch enters the condenser 3 of the high-temperature heat pump to absorb heat and then enters the biomass boiler 6. This application utilizes the medium-temperature water produced by the solar collector 1 as a medium-temperature heat source. A portion of the heat from this medium-temperature water is used to raise the temperature of another portion under the action of a high-temperature heat pump, producing high-temperature water which is then supplied to the biomass boiler 6. The medium-temperature water used for heat release is either incorporated into the feedwater pipeline or directly returned to the first water inlet 11 of the solar collector 1 for recirculation and heating. This comprehensively utilizes solar energy, electrical energy, and biomass energy to produce steam. Based on the suitable heating range of different energy devices, the temperature is gradually increased in the form of ambient temperature feedwater – medium-temperature water – high-temperature water – steam. The solar collector 1 is rationally coupled with a high-temperature heat pump to provide high-temperature water to the biomass boiler 6, reducing biomass consumption. The high-temperature heat pump improves energy utilization efficiency, and the solar collector 1 and biomass boiler 6 reduce carbon emissions. In areas with relatively abundant solar energy and biomass, this application effectively addresses steam demand, significantly reducing carbon emissions, improving energy utilization, and lowering steam supply costs.
[0031] Preferably, the high-temperature heat pump includes an evaporator 2, a compressor 4, a condenser 3, and a throttling valve 5 connected in a loop. A portion of the medium-temperature water produced by the solar collector 1 releases heat in the evaporator 2, transforming into room-temperature or low-temperature water; another portion of the medium-temperature water produced by the solar collector 1 absorbs heat in the condenser 3, transforming into high-temperature water. The working fluid side of the evaporator 2, the compressor 4, the working fluid side of the condenser 3, and the throttling valve 5 are connected in a loop to form a closed circuit. The working principle of the working fluid is as follows: the lower-temperature working fluid absorbs heat from the medium-temperature water on the working fluid side of the evaporator 2, causing its temperature to rise and evaporate. Then, it is further compressed by the compressor 4 to increase the pressure and temperature of the working fluid. The high-temperature, high-pressure working fluid releases heat on the working fluid side of the condenser 3, and then further reduces its pressure and temperature through the throttling valve 5, finally returning to the working fluid side of the evaporator 2, forming a cycle that absorbs heat from the medium-temperature water flowing through the evaporator 2 and releases heat to the medium-temperature water flowing through the condenser 3.
[0032] The specific connection relationship between the solar collector 1, the high-temperature heat pump and the bio-boiler is as follows: the first water outlet 12 of the solar collector 1 is connected to the second water inlet 21 of the evaporator 2, and the second water outlet 22 of the evaporator 2 is connected to the first water inlet 11 of the solar collector 1, so that this part of the medium-temperature water releases heat in the evaporator 2 and then returns to the solar collector 1 to be heated again.
[0033] The first water outlet 12 of the solar collector 1 is also connected to the third water inlet 31 of the condenser 3, and the third water outlet 32 of the condenser 3 is connected to the fourth water inlet 61 of the biomass boiler 6, which enables another part of the medium-temperature water to absorb heat in the condenser 3 to become high-temperature water, and then the high-temperature water is heated by the biomass boiler 6 to produce steam.
[0034] Preferably, the third water outlet 32 of the condenser 3 is also connected to an external heating pipeline, which can directly provide high-temperature water to hot water users.
[0035] Winter is the season with the highest demand for heating, while solar energy is relatively scarce. In some areas, it is inefficient to use solar energy to directly heat the water supply to 80-90°C. The solar collector 1 in the system of this application heats the water supply to 40-60°C, and then a portion of the water is heated to 80-90°C by a high-temperature heat pump, and then steam is generated by the biomass boiler 6.
[0036] Preferably, a circulating water pump 7 is provided between the second water outlet 22 of the evaporator 2 and the first water inlet 11 of the solar collector 1.
[0037] Preferably, a water supply pump 8 is installed on the water supply pipeline.
[0038] Preferably, a first valve 9 is provided between the first water outlet 12 of the solar collector 1 and the second water inlet 21 of the evaporator 2; a second valve 10 is provided between the first water outlet 12 of the solar collector 1 and the third water inlet 31 of the condenser 3. By controlling the first valve 9 and the second valve 10, the flow rates of the medium-temperature water used for heat release and heat absorption are controlled respectively, thereby controlling the flow rate and temperature of the high-temperature water produced by the high-temperature heat pump.
[0039] Optionally, the specific structure of the solar collector 1 is not specifically limited, as long as it can absorb solar energy to raise the temperature of the feed water. An optional, simple structure of the solar collector 1 mainly includes heat-absorbing tubes, a light-transmitting heat-insulating plate, and a heat-insulating layer. Multiple heat-absorbing tubes absorb solar radiation and convert it into heat energy. They are made of high thermal conductivity metal and have internal flow channels. One end of the flow channel is the aforementioned first water inlet 11, and the other end is the first water outlet 12. The surface can be covered with a selective absorption coating, which needs to have high absorptivity and low reflectivity. The light-transmitting heat-insulating plate is located on the sun-facing side of the heat-absorbing tube. It can be made of high light transmittance, low-iron tempered glass, allowing sunlight to penetrate into the heat-absorbing tube. It also has dustproof and moisture-proof functions and reduces heat loss from heat convection and radiation to the environment. The heat-insulating layer is located on the shaded side of the heat-absorbing tube and around its perimeter. It can be made of high-temperature resistant insulation materials such as rock wool, polyurethane foam, or fiberglass, and is used to prevent heat loss from the heat-absorbing tube to the back and sides.
[0040] Optionally, the biomass boiler 6 can be various biomass steam boilers, such as a direct-fired biomass boiler or a biomass gasification combined with waste heat boiler. A direct-fired biomass boiler directly uses biomass as fuel to heat high-temperature water to produce steam. A biomass gasification combined with waste heat boiler can be a boiler that gasifies biomass, burns it, and combines it with industrial waste heat to produce steam. An optional biomass boiler 6 mainly includes: a combustion chamber, an air distribution assembly, a flue gas emission assembly, and a heat exchange assembly; wherein, biomass fuel accumulates in the combustion chamber to form a combustion layer; the air distribution assembly includes a primary air fan and a secondary air fan located outside the combustion chamber; the duct of the primary air fan extends into the combustion chamber near the combustion layer, providing the main combustion air passing through the fuel layer; the duct of the secondary air fan extends into the combustion chamber above the combustion layer, providing the oxygen required for complete combustion, promoting turbulent mixing of flue gas, extending residence time, and reducing CO and unburned hydrocarbon emissions. The flue gas emission assembly includes a flue located at the top of the combustion chamber and purification and dust removal components, an induced draft fan, and a chimney connected to the flue. The heat exchange assembly includes a water-cooled wall and a steam drum. The water-cooled wall is a heating surface pipe located around the combustion chamber, which directly absorbs the radiant heat from the flame and high-temperature flue gas. It is the main evaporative heating surface. One end of the heating surface pipe is provided with a fourth water inlet 61, and the other end is provided with a steam outlet.
[0041] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0042] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this application and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this application should be included within the protection scope of this application. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.
Claims
1. A comprehensive energy supply system for steam and heat, characterized in that, include: Solar collectors (1), high-temperature heat pumps and biomass boilers (6); The solar collector (1) is used to heat the water supply using solar energy to prepare medium-temperature water, and its first water inlet (11) is connected to the water supply pipeline; The high-temperature heat pump is used to prepare high-temperature water from medium-temperature water. The biomass boiler (6) is used to generate steam from high-temperature water using biomass energy; The medium-temperature water from the first water outlet (12) of the solar collector (1) is divided into at least two branches. One branch enters the evaporator (2) of the high-temperature heat pump to release heat and then returns to the first water inlet (11) of the solar collector (1). The other branch enters the condenser (3) of the high-temperature heat pump to absorb heat and then enters the biomass boiler (6).
2. The integrated energy steam and heat supply system according to claim 1, characterized in that, The high-temperature heat pump includes an evaporator (2), a compressor (4), a condenser (3), and a throttling valve (5) connected in a loop; The first water outlet (12) of the solar collector (1) is connected to the second water inlet (21) of the evaporator (2), and the second water outlet (22) of the evaporator (2) is connected to the first water inlet (11) of the solar collector (1); The first water outlet (12) of the solar collector (1) is also connected to the third water inlet (31) of the condenser (3), and the third water outlet (32) of the condenser (3) is connected to the fourth water inlet (61) of the biomass boiler (6).
3. The integrated energy steam and heat supply system according to claim 2, characterized in that, The third water outlet (32) of the condenser (3) is also connected to an external heating pipeline.
4. The integrated energy steam and heat supply system according to claim 2, characterized in that, A circulating water pump (7) is provided between the second water outlet (22) of the evaporator (2) and the first water inlet (11) of the solar collector (1).
5. The integrated energy steam and heat supply system according to claim 2, characterized in that, A water supply pump (8) is installed on the water supply pipeline.
6. The integrated energy steam and heat supply system according to claim 2, characterized in that, A first valve (9) is provided between the first water outlet (12) of the solar collector (1) and the second water inlet (21) of the evaporator (2); A second valve (10) is provided between the first water outlet (12) of the solar collector (1) and the third water inlet (31) of the condenser (3).