A combined solar and biomass energy heating device and its usage method

Abstract

The present invention provides a combined solar and biomass heating device, which includes a biomass heating mechanism, a solar heating mechanism and a heating pipeline. The heating pipeline includes a cold water injection pipe and a hot water output pipe. The solar heating mechanism includes a solar collector panel and a heat exchange circulation pipeline that cooperate with each other. The heat exchange circulation pipeline is provided with a heat exchanger and a circulation pump. The cold water injection pipe and the hot water output pipe are respectively connected to the heat exchanger. The biomass heating mechanism includes a biogas digester and two gas water heaters. One of the gas water heaters is installed on the hot water output pipe, and the other gas water heater is installed on the heat exchange circulation pipeline. The present invention adopts a heating method combining solar energy and biomass energy to solve the influence of light factors when heating only by solar energy. The heating is stable and efficient. At the same time, the traditional heating method combining solar energy and electric energy is abandoned, which can reduce the consumption of electric energy in the power grid and improve the utilization of biomass energy.

Description

Technical Field

[0001] The present invention relates to the field of heating technology, and more particularly to a combined solar and biomass energy heating device and its usage method. Background Art

[0002] With the continuous enhancement of people's awareness of energy conservation, environmental protection, and the protection of non-renewable natural resources such as oil, coal, natural gas, and marine ice, the application of solar heating has been gradually popularized. Solar heating refers to a solar heat collection system. The existing solar heating structure is too simple and is affected by lighting factors, resulting in instability and low efficiency during use. Therefore, it is generally combined with an electric heating system for use.

[0003] With the continuous improvement and perfection of biomass fuel preparation technology and combustion technology, renewable biofuels such as straw, rice husk, sawdust, fruit shells, bagasse, and corn cobs can be prepared into biogas for combustion, thereby reducing the phenomenon of straw burning. Regarding the aforementioned straw, according to statistics from China's agricultural department, the annual output nationwide reaches about one billion tons. Calculated based on a acquisition coefficient of 90% to 95%, about 900 to 950 million tons can be obtained, which is equivalent to 450 to 475 million tons of standard coal (the energy of 1 ton of straw is equivalent to 0.5 tons of standard coal). The so-called standard coal is what the public commonly refers to as standard coal. According to Chinese national standard GB2589-81, the calorific value of each kilogram of standard coal is 29,271 kJ, that is, 7,000 kcal. It can be seen that effectively using biomass fuel can not only reduce the degree of dependence on non-renewable natural resources, but also has ideal economic affordability. Moreover, with the rapid development of China's economy and industry, the electricity load has increased extremely. Using electricity for heating also poses a certain degree of challenge to the normal operation of the power grid during peak electricity consumption periods. Therefore, the traditional combined solar and electric heating method is not the best heating solution. Summary of the Invention

[0004] The present invention aims to solve the problems raised in the above background art and provides a combined solar and biomass energy heating device to reduce power consumption and improve the utilization of biomass energy.

[0005] The embodiments of the present invention are implemented as follows:

[0006] A combined solar and biomass energy heating device includes a biomass heating mechanism, a solar heating mechanism, and a heating pipeline. The heating pipeline includes a cold water injection pipe and a hot water output pipe. The solar heating mechanism includes a mutually cooperating solar heat collection panel and a heat exchange circulation pipeline. The heat exchange circulation pipeline is provided with a heat exchanger and a circulation pump. The cold water injection pipe and the hot water output pipe are respectively connected to the heat exchanger;

[0007] The described biomass heating mechanism includes a biogas digester and two gas water heaters. Both of the two gas water heaters are connected to the biogas digester through gas transmission pipes. One of the gas water heaters is installed on the hot water output pipe, and the other gas water heater is installed on the heat exchange circulation pipeline;

[0008] After the heat collection plate of the solar energy collector absorbs solar energy, the liquid inside the heat collection plate is heated. The circulation pump makes the heated liquid circulate in the heat exchange circulation pipeline. When passing through the heat collection side of the heat exchanger, heat exchange is achieved with the heat exchange side, so that the hot water output pipe can output hot water. Specifically, the entire heat exchange circulation pipeline and the inside of the heat collection plate are filled with liquid for heat transfer;

[0009] The biomass heating mechanism includes a biogas digester and two gas water heaters. Both of the two gas water heaters are connected to the biogas digester through gas transmission pipes. One of the gas water heaters is installed on the hot water output pipe, and the other gas water heater is installed on the heat exchange circulation pipeline;

[0010] The fuel generated by the biogas digester directly heats the water in the hot water output pipe through the gas water heater. At the same time, on cold nights, the fuel generated by the biogas digester also directly heats the heat exchange circulation pipeline through the other gas water heater. During this process, the circulation pump needs to be in operation to ensure the circulation of the liquid for heat transfer in the solar energy collector and the heat exchange circulation pipeline, thereby realizing the protection of the heat collection plate;

[0011] The present invention adopts a heating method combining solar energy and biomass energy to solve the influence of light factors when heating solely by solar energy. The heating is stable and efficient. At the same time, the traditional heating method combining solar energy and electric energy is abandoned, which can reduce the consumption of electric energy in the power grid and improve the utilization of biomass energy.

[0012] Specifically, the heat exchanger has a heat collection side and a heat exchange side. The cold water injection pipe and the hot water output pipe are respectively connected to both ends of the heat exchange side, and both ends of the heat collection side are connected to the heat exchange circulation pipeline.

[0013] Preferably, the solar and biomass combined heating device further includes a heat collection mechanism. The heat collection mechanism includes a heat collection tank, a heat collection pipeline, a first control valve, and a second control valve. The heat collection pipeline is cooperated with the heat collection tank through a connection mechanism. Both ends of the heat collection pipeline are connected to the heat exchange circulation pipeline. The first control valve is arranged on the heat collection pipeline, and the second control valve is arranged on the heat exchange circulation pipeline and is located at a position between the connection points at both ends of the heat collection pipeline. Through the setting of the heat collection mechanism, on the one hand, when the sun is sufficient and the heat energy demand is small, the heat energy can be stored for use when the sun is not sufficient. At the same time, when the sun is sufficient and the heat energy demand is small, the gasification of the liquid used for heat transfer in the solar heat collection panel and the heat exchange circulation pipeline can be effectively reduced, thereby reducing the occurrence of failures. On the other hand, when too much fuel is generated in the biogas digester and needs to be released for safety reasons, the heat exchange circulation pipeline is directly heated by the gas water heater, and the heat collection mechanism is also used to store heat energy for use when the sun is not sufficient.

[0014] Specifically, the top of the heat collection tank has a cold water injection port, and the bottom has a hot water discharge port. The hot water discharge port is connected to one end of the cold water injection pipe on the heat exchange side through a connecting pipe. A fifth control valve and a booster pump are arranged on the connecting pipe.

[0015] Specifically, the connection mechanism includes a heat exchange pipe and two through holes opened on the heat collection tank. The heat exchange pipe is placed inside the heat collection tank, and both ends extend out of the heat collection tank through the two through holes respectively and are connected to the heat exchange circulation pipeline through the heat collection pipeline.

[0016] Preferably, an auxiliary circulation unit is arranged on the heat exchange circulation pipeline;

[0017] The auxiliary circulation unit is composed of an auxiliary pipe, a third control valve, and a fourth control valve. The parts of the heat exchange circulation pipeline from both ends of the heat collection side of the heat exchanger to the solar heat collection panel are connected through the auxiliary pipe. The third control valve is arranged on the auxiliary pipe, and the fourth control valve is arranged on the heat exchange circulation pipeline and is located at a position between the connection point of the heat collection pipeline and the solar heat collection panel.

[0018] The circulation pump arranged on the heat exchange circulation pipeline is located at a position between the heat collection side of the heat exchanger and the connection point of the auxiliary pipe. The gas water heater arranged on the heat exchange circulation pipeline is located at a position between one end of the heat collection side of the heat exchanger and the connection point of the auxiliary pipe. The heat collection pipeline and the second control valve arranged on the heat exchange circulation pipeline are both located at a position between the other end of the heat collection side of the heat exchanger and the connection point of the auxiliary pipe.

[0019] The usage method of the above-mentioned solar and biomass combined heating device includes the following steps;

[0020] S1: Determine the heating scenario;

[0021] S2: According to the determined heating scenarios, the combined heating of the biomass heating mechanism and the solar heating mechanism is achieved by controlling the opening and closing of the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, and the opening and closing of the two gas water heaters.

[0022] Specifically, the heating scenarios include whether the solar energy is sufficient during daytime heating and the night heating scenario.

[0023] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0024] The present invention adopts a heating method combining solar energy and biomass energy to solve the influence of light factors when heating solely by solar energy. The heating is stable and efficient. At the same time, the traditional heating method combining solar energy and electric energy is abandoned, which can reduce the consumption of electric energy in the power grid and improve the utilization of biomass energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 Reference diagram for the working process of Embodiment 1;

[0027] Figure 2 Reference diagram for the working process of Embodiment 2;

[0028] Figure 3 Reference diagram for the working process of Embodiment 3.

[0029] Reference numerals: 1. Biomass heating mechanism, 11. Biogas digester, 12. Gas water heater, 2. Solar heating mechanism, 21. Solar collector panel, 22. Heat exchange circulation pipeline, 23. Circulation pump, 24. Heat exchanger, 3. Heating pipeline, 31. Cold water injection pipe, 32. Hot water output pipe, 4. Heat collection mechanism, 41. Heat collection tank, 42. Heat collection pipeline, 43. First control valve, 44. Second control valve, 5. Heat exchange pipe, 61. Auxiliary pipe, 62. Third control valve, 63. Fourth control valve, 7. Connection pipeline, 71. Fifth control valve, 72. Booster pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention generally described and illustrated in the drawings here may be arranged and designed in a variety of different configurations.

[0031] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiment 1:

[0033] As Figure 1 shown, a combined solar and biomass heating device includes a biomass heating mechanism 1, a solar heating mechanism 2, and a heating pipeline 3. The heating pipeline 3 includes a cold water injection pipe 31 and a hot water output pipe 32. The solar heating mechanism 2 includes a solar collector panel 21 and a heat exchange circulation pipeline 22 that cooperate with each other. The heat exchange circulation pipeline 22 is provided with a heat exchanger 24 and a circulation pump 23. The cold water injection pipe 31 and the hot water output pipe 32 are respectively connected to the heat exchanger 24. Specifically, the heat exchanger 24 has a heat collection side and a heat exchange side. The cold water injection pipe 31 and the hot water output pipe 32 are respectively connected to both ends of the heat exchange side, and both ends of the heat collection side are connected to the heat exchange circulation pipeline 22;

[0034] After the collector panel of the solar collector panel 21 absorbs solar energy, the liquid inside the collector panel is heated. The circulation pump 23 causes the heated liquid to circulate in the heat exchange circulation pipeline 22 and exchanges heat with the heat exchange side when passing through the heat collection side of the heat exchanger 24, so that the hot water output pipe 32 can output hot water. Specifically, the entire heat exchange circulation pipeline 22 and the inside of the collector panel are filled with a liquid for heat transfer;

[0035] The biomass heating mechanism 1 includes a biogas digester 11 and two gas water heaters 12. The two gas water heaters 12 are both connected to the biogas digester 11 through a gas transmission pipe. One of the gas water heaters 12 is installed on the hot water output pipe 32, and the other gas water heater 12 is installed on the heat exchange circulation pipeline 22;

[0036] The fuel generated by the biogas digester 11 directly heats the water in the hot water output pipe 32 through the gas water heater 12. At the same time, on cold nights, the fuel generated by the biogas digester 11 also directly heats the heat exchange circulation pipeline 22 through another gas water heater 12. During this process, the circulation pump 23 needs to be in an operating state to ensure the circulating flow of the heat-carrying liquid in the solar collector panel 21 and the heat exchange circulation pipeline 22, thereby realizing the protection of the collector panel.

[0037] The present invention adopts a heating method combining solar energy and biomass energy to solve the influence of light factors when heating only by solar energy. The heating is stable and efficient. At the same time, it also abandons the traditional heating method of solar energy plus electric energy, which can reduce the consumption of electric energy in the power grid and improve the utilization of biomass energy.

[0038] Embodiment 2:

[0039] On the basis of Embodiment 1, further, as Figure 2 shown, the solar energy and biomass energy combined heating device further includes a heat collection mechanism 4. The heat collection mechanism 4 includes a heat collection tank 41, a heat collection pipeline 42, a first control valve 43, and a second control valve 44. The heat collection pipeline 42 cooperates with the heat collection tank 41 through a connection mechanism. Both ends of the heat collection pipeline 42 are connected to the heat exchange circulation pipeline 22. The first control valve 43 is arranged on the heat collection pipeline 42, and the second control valve 44 is arranged on the heat exchange circulation pipeline 22 and is located at a position between the connection points at both ends of the heat collection pipeline 42.

[0040] Through the setting of the heat collection mechanism 4, on the one hand, when the sunlight is sufficient and the heat energy demand is small, the heat energy can be stored for use when the sunlight is not sufficient. At the same time, when the sunlight is sufficient and the heat energy demand is small, the gasification of the heat-carrying liquid in the solar collector panel 21 and the heat exchange circulation pipeline 22 can be effectively reduced, thereby reducing the occurrence of faults. On the other hand, when the fuel generated by the biogas digester 11 is excessive and needs to be released for safety reasons, the heat exchange circulation pipeline 22 is directly heated through the gas water heater 12, and the heat collection mechanism 4 is used to store the heat energy for use when the sunlight is not sufficient.

[0041] Specifically, the top of the heat collection tank 41 has a cold water injection port, and the bottom has a hot water discharge port. The hot water discharge port is connected to one end of the cold water injection pipe 31 on the heat exchange side through a connecting pipe 7. The connecting pipe 7 is provided with a fifth control valve 71 and a booster pump 72.

[0042] Specifically, the connection mechanism includes a heat exchange pipe 5 and two through holes opened on the heat collection tank 41. The heat exchange pipe 5 is placed inside the heat collection tank 41, and both ends extend out of the heat collection tank 41 from the two through holes and are connected to the heat exchange circulation pipeline 22 through the heat collection pipeline 42.

[0043] Embodiment 3

[0044] On the basis of Embodiment 2, further, as Figure 3 shown, an auxiliary circulation unit is provided in the heat exchange circulation pipeline 22. By setting the auxiliary circulation unit, when there is too much fuel generated by the biogas digester 11 and the heat collection mechanism 4 is used to store heat energy, the length of the flow path of the liquid used for heat transfer in the heat exchange circulation pipeline 22 is reduced, thereby improving the heat storage efficiency; specifically, the auxiliary circulation unit is composed of an auxiliary pipe 61, a third control valve 62 and a fourth control valve 63. The part of the heat exchange circulation pipeline 22 from both ends of the heat collection side of the heat exchanger 24 to the solar heat collection panel 21 is connected through the auxiliary pipe 61. The third control valve 62 is provided on the auxiliary pipe 61, and the fourth control valve 63 is provided on the heat exchange circulation pipeline 22 and is located at the part between the connection point of the heat collection pipeline 42 and the solar heat collection panel 21;

[0045] The circulation pump 23 provided on the heat exchange circulation pipeline 22 is located at the part between the heat collection side of the heat exchanger 24 and the connection point of the auxiliary pipe 61. The gas water heater 12 provided on the heat exchange circulation pipeline 22 is located at the part between one end of the heat collection side of the heat exchanger 24 and the connection point of the auxiliary pipe 61. The heat collection pipeline 42 and the second control valve 44 provided on the heat exchange circulation pipeline 22 are both located at the part between the other end of the heat collection side of the heat exchanger 24 and the connection point of the auxiliary pipe 61;

[0046] By controlling the opening and closing of the first control valve 43, the second control valve 44, the third control valve 62 and the fourth control valve 63, the flow path of the liquid used for heat transfer can be regulated.

[0047] Embodiment 4:

[0048] On the basis of Embodiment 3, a usage method of the solar energy and biomass energy combined heating device as described above includes the following steps;

[0049] S1: Determine the heating scenario, where the heating scenario includes whether the solar energy is sufficient during daytime heating and the night heating scenario;

[0050] S2: According to the determined heating scenario, through controlling the opening and closing of the first control valve 43, the second control valve 44, the third control valve 62, the fourth control valve 63, the fifth control valve 71 and controlling the opening and closing of the two gas water heaters 12, the biomass heating mechanism 1 and the solar heating mechanism 2 are used for combined heating.

[0051] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A combined solar and biomass heating device, comprising a biomass heating mechanism, a solar heating mechanism and a heating pipeline. The heating pipeline includes a cold water injection pipe and a hot water output pipe, and is characterized in that, The described solar heating mechanism includes a solar collector panel and a heat exchange circulation pipeline that cooperate with each other. The heat exchange circulation pipeline is provided with a heat exchanger and a circulation pump. The cold water injection pipe and the hot water output pipe are respectively connected to the heat exchanger. The described biomass heating mechanism includes a biogas digester and two gas water heaters. Both of the two gas water heaters are connected to the biogas digester through a gas transmission pipe. One of the gas water heaters is installed on the hot water output pipe, and the other gas water heater is installed on the heat exchange circulation pipeline. The described heat exchanger has a heat collection side and a heat exchange side. The cold water injection pipe and the hot water output pipe are respectively connected to both ends of the heat exchange side. Both ends of the heat collection side are connected to the heat exchange circulation pipeline. This solar and biomass combined heating device further includes a heat collection mechanism. The heat collection mechanism includes a heat collection tank, a heat collection pipeline, a first control valve, and a second control valve. The heat collection pipeline cooperates with the heat collection tank through a connection mechanism. Both ends of the heat collection pipeline are connected to the heat exchange circulation pipeline. The first control valve is arranged on the heat collection pipeline, and the second control valve is arranged on the heat exchange circulation pipeline and is located at a position between the connection points at both ends of the heat collection pipeline. An auxiliary circulation unit is provided in the heat exchange circulation pipeline. The auxiliary circulation unit is composed of an auxiliary pipe, a third control valve, and a fourth control valve. The part of the heat exchange circulation pipeline from both ends of the heat collection side of the heat exchanger to the solar collector panel is connected through the auxiliary pipe. The third control valve is arranged on the auxiliary pipe, and the fourth control valve is arranged on the heat exchange circulation pipeline and is located at a position between the connection point of the heat collection pipeline and the solar collector panel. The circulation pump arranged on the heat exchange circulation pipeline is located at a position between the heat collection side of the heat exchanger and the connection point of the auxiliary pipe. The gas water heater arranged on the heat exchange circulation pipeline is located at a position between one end of the heat collection side of the heat exchanger and the connection point of the auxiliary pipe. The heat collection pipeline and the second control valve arranged on the heat exchange circulation pipeline are both located at a position between the other end of the heat collection side of the heat exchanger and the connection point of the auxiliary pipe.

2. The solar and biomass combined heating device according to claim 1, wherein The top of the described heat collection tank has a cold water inlet, and the bottom has a hot water discharge outlet. The hot water discharge outlet is connected to one end of the heat exchange side for connecting the cold water injection pipe through a connecting pipeline. The connecting pipeline is provided with a fifth control valve and a booster pump.

3. The solar and biomass combined heating device according to claim 2, wherein The described connection mechanism includes a heat exchange pipe and two through holes opened on the heat collection tank. The heat exchange pipe is placed inside the heat collection tank, and both ends extend out of the heat collection tank from the two through holes respectively and are connected to the heat exchange circulation pipeline through the heat collection pipeline.

4. A method for using the solar and biomass combined heating device according to claim 3, characterized in that, It includes the following steps; S1: Determine the heating scenario; S2: According to the determined heating scenario, realize the combined heating of the biomass heating mechanism and the solar heating mechanism by controlling the opening and closing of the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, and the opening and closing of the two gas water heaters.

5. The method for using the combined solar and biomass energy heating device according to claim 4, characterized in that, The described heating scenario includes whether the solar energy is sufficient during daytime heating and the night heating scenario.

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