Brewery park source network load storage integrated comprehensive energy system and operation method

Abstract

This invention relates to the field of energy recycling technology, specifically to an integrated energy system and operation method based on a winery industrial park, comprising a steam supply system consisting of "natural gas + rooftop photovoltaic + rooftop solar thermal + high-temperature water source heat pump + electric steam storage + biogas steam boiler" and a cooling / heating and hot water supply system consisting of "sewage source heat pump + gas boiler + air source heat pump + PVT components". Furthermore, a "photovoltaic-storage-direct-flexible" system is constructed within the winery, interconnecting photovoltaic, energy storage, factory electricity, and DC power distribution through flexible interactive technology to create a photovoltaic-storage-charging-direct-flexible system integrating AC and DC power distribution, thereby promoting energy conservation, efficiency improvement, and green transformation in winemaking.

Description

Technical Field

[0001] This invention relates to the field of energy recycling technology, specifically to an integrated energy system and operation method based on the source-grid-load-storage system of a winery industrial park. Background Technology

[0002] The brewing process mainly consists of sorghum crushing, moistening, steaming in a still, fermentation in a vat, distillation, secondary fermentation in a vat, and re-distillation. During the distillation cooling stage, the distillery uses air cooling or circulating water cooling systems. According to research, a significant amount of waste heat resources in the brewing process are not being effectively utilized.

[0003] In addition, the large-scale production of baijiu is accompanied by the generation of a huge amount of by-products—distillers' grains. According to field surveys of distilleries and relevant literature, the ratio of baijiu production to distillers' grains production is about 1:3.3. How to make full use of the distillery's grains resources is also a current research focus.

[0004] In traditional winery energy supply systems, the various sectors and energy supply methods are either independent or partially interconnected. The collaborative control logic is simple, and the design goals are often focused on statically meeting the supply capacity at a single point. This results in problems such as low energy utilization efficiency, resource waste, large capacity of various energy supply facilities, and high investment.

[0005] Currently, many efforts have been made both domestically and internationally in low-carbon brewing, but there are few cases of large-scale recovery of waste heat from brewing in the distillation pot. Low-carbon integrated systems mainly rely on photovoltaic installations and coal / gas-to-electricity conversion technologies, with few integrated energy utilization systems for steam generation.

[0006] In view of this, the present invention is hereby proposed. Summary of the Invention

[0007] The purpose of this invention is to provide an integrated energy system and operation method for a winery industrial park, encompassing energy sources, grid, load, and storage. This system optimizes the configuration of multiple energy sources, focusing on solar energy, waste heat from the winery, and high-efficiency high-temperature electric heat pumps for steam supply, achieving energy-saving and emission-reduction technological transformation of the brewing steam heat supply system. By fully utilizing resources such as vacant rooftops in the winery and deploying photovoltaic power generation facilities, a portion of fossil fuel consumption is replaced, constructing a highly efficient renewable energy consumption system integrating solar, energy storage, direct current, and flexible power generation. A novel waste heat high-temperature heat pump technology is employed, using electrically driven heat pumps to further improve the recovery and utilization level of waste heat from brewing. The use of high-temperature waste heat heat pumps to produce steam replaces a portion of fossil fuel consumption, increases the enterprise's steam sources, ensures the security of steam supply, and constructs a new energy system suitable for the green and low-carbon development of brewing enterprises.

[0008] To achieve one of the above objectives, the present invention provides the following technical solution:

[0009] Based on the integrated energy system of the winery park, including photovoltaic-storage direct-flexible system, steam supply system, and cooling / heating and hot water supply system;

[0010] The photovoltaic-storage-direct-flexible system includes solar energy, photovoltaic modules, factory power supply, energy storage power station, solar collectors, electric steam storage, high-temperature water source heat pump, sewage source heat pump, and air source heat pump.

[0011] The steam supply system includes a distiller's grains, natural gas, biogas boiler, first gas boiler, solar collector, electric steam storage, high-temperature water source heat pump, waste heat recovery unit, brewing steam, and steam storage.

[0012] The cooling / heating and hot water system includes wastewater energy, a second gas-fired boiler, a wastewater source heat pump, an air source heat pump, a PVT photovoltaic-thermal integrated heat pump, domestic hot water, plant heating, plant cooling, and hot water storage.

[0013] Preferably, the solar energy is connected to a solar collector, a PVT photovoltaic-thermal integrated heat pump, and a photovoltaic module.

[0014] Preferably, the photovoltaic module is connected to a high-temperature water source heat pump and an electric steam storage device.

[0015] Preferably, the photovoltaic module is also connected to a wastewater source heat pump and an air source heat pump.

[0016] Preferably, the natural gas is connected to a first gas-fired boiler and a second gas-fired boiler, respectively.

[0017] Preferably, the wastewater can be connected to a biogas boiler and a wastewater source heat pump, respectively.

[0018] Preferably, the photovoltaic-storage-DC-flexible system includes State Grid municipal power, and the photovoltaic modules are connected to State Grid municipal power through a distribution transformer.

[0019] Preferably, in the cooling / heating and hot water supply system:

[0020] Wastewater can be connected to a wastewater heat pump, which in turn is connected to the plant's heating and cooling systems.

[0021] The second gas-fired boiler is connected to the plant area for heating;

[0022] PVT photovoltaic-thermal integrated heat pump and air source heat pump are connected to domestic hot water.

[0023] Preferably, in the steam supply system:

[0024] The lees are connected to the first gas-fired boiler, which produces brewing steam.

[0025] A high-temperature water source heat pump is connected to a waste heat recovery unit to produce brewing steam.

[0026] Biogas boilers can produce brewing steam using wastewater.

[0027] To achieve the second objective mentioned above, the present invention provides the following technical solution:

[0028] Long-term thermal storage: During the operation of the winery, solar energy supplies solar collectors with light and heat for the brewing process of brewing steam; during the winery's shutdown, solar collectors absorb solar radiation energy, heat water to 90-95℃ through medium heat exchange, and send the hot water to the underground thermal storage device for storage through the primary circulating water pump of the thermal storage side. After production and office work resume, the hot water is used to provide domestic hot water load for the park or for preheating brewing steam through heat exchange.

[0029] Short-cycle heating: During the 16-hour production period each day, photovoltaic modules provide electrical load for high-temperature water source heat pumps, electric steam storage, sewage source heat pumps, and air source heat pumps, with any shortfall in power supplied by State Grid municipal power; during the 8-hour shutdown period each day, energy storage batteries are charged through photovoltaic modules and State Grid municipal power.

[0030] PVT Photovoltaic / Photothermal Integrated Heat Storage: PVT photovoltaic and photothermal integrated heat pumps utilize solar radiation to perform photothermal conversion through collectors, producing hot water to supply domestic hot water loads in the plant area; waste heat is sent to underground heat storage devices for storage through a primary circulating water pump.

[0031] Compared with existing technologies, this invention provides an integrated energy system and operation method for a winery industrial park, combining power generation, grid, load, and storage. Without affecting traditional winemaking processes, it constructs a steam supply system consisting of "natural gas + rooftop photovoltaic + rooftop solar thermal + high-temperature water source heat pump + electric steam storage + biogas steam boiler," and a cooling / heating and hot water supply system consisting of "sewage source heat pump + gas boiler + air source heat pump + PVT modules." Furthermore, it constructs a "photovoltaic-storage-DC-flexible" system within the winery, interconnecting photovoltaics, energy storage, factory electricity, and DC power distribution through flexible interactive technology to create a hybrid AC / DC power distribution system. This promotes energy conservation, efficiency improvement, and green transformation in winemaking.

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used 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 should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structural framework of an integrated energy system based on a winery industrial park, which is provided as an embodiment of the present invention.

[0035] Figure 2 This invention provides a process diagram of a long-cycle thermal storage system for the operation of an integrated energy system based on a winery industrial park source-grid-load-storage system.

[0036] Figure 3 This invention provides a process diagram of a short-cycle energy storage system in an operation method of an integrated energy system based on a winery industrial park's source-grid-load-storage system.

[0037] Figure 4 This is a process diagram of the PVT photovoltaic / solar thermal integrated energy storage control operation method in an integrated energy system based on a winery industrial park, provided in an embodiment of the present invention.

[0038] The diagram is shown below:

[0039] 01. Steam supply system; 02. Photovoltaic-storage-direct-current-flexible system; 03. Cooling / heating and hot water supply system.

[0040] 101. Distillers' grains; 102. Natural gas; 103. Solar energy; 104. Wastewater energy.

[0041] 201. Biogas boiler; 202. First gas-fired boiler; 203. Solar collector; 204. Electric steam storage; 205. High-temperature water source heat pump; 206. Waste heat recovery unit; 207. Photovoltaic module; 208. State Grid municipal power; 209. Second gas-fired boiler; 210. Sewage source heat pump; 211. Air source heat pump; 212. PVT photovoltaic-thermal integrated heat pump.

[0042] 301. Brewing steam; 302. Factory electricity; 303. Factory heating; 304. Factory cooling; 305. Domestic hot water.

[0043] 401. Steam storage; 402. Electricity storage; 403. Hot water storage. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] like Figure 1 As shown in the figure, this embodiment of the invention provides an integrated energy system based on a winery industrial park, comprising three systems: a photovoltaic-storage-direct-flexible system 02, a steam supply system 01, and a cooling / heating and hot water supply system 03. The components of the three systems are as follows:

[0046] The photovoltaic-storage-direct-flexible system 02 includes solar energy 103, photovoltaic modules 207, State Grid municipal power 208, factory power 302, energy storage power station, solar collector 103, electric steam storage 204, high-temperature water source heat pump 205, sewage source heat pump 210, and air source heat pump 211.

[0047] The steam supply system 01 includes a distiller's grains 101, natural gas 102, a biogas boiler 201, a first gas-fired boiler 202, a solar collector 103, an electric steam storage unit 204, a high-temperature water source heat pump 205, a waste heat recovery unit 206, brewing steam 301, and a steam storage unit 401.

[0048] The cooling / heating and hot water system 03 includes wastewater energy 104, a second gas boiler 209, a wastewater source heat pump 210, an air source heat pump 211, a PVT photovoltaic-thermal integrated heat pump 212, domestic hot water 305, plant area heating 303, plant area cooling 304, and hot water storage 403.

[0049] In the photovoltaic-storage-direct-flexible system 02, solar cell 103 is connected to the solar collector in the steam supply system 01 via a1 to supply solar thermal steam for brewing 301; solar cell 103 is connected to the PVT photovoltaic-thermal integrated heat pump via a2 to supply solar thermal hot water for domestic use 305; solar cell 103 supplies solar thermal power to photovoltaic module 207 via a3, and photovoltaic module 207 is connected to the high-temperature water source heat pump 205 and electric steam storage 204 in the steam supply system 01 via a4 and a7 to supply power for brewing steam 301. In addition, photovoltaic module 207 is also connected to the sewage source heat pump 210 and air source heat pump 211 in the cooling / heating and hot water supply system 03 via a5 and a6 to supply power. To fully utilize photovoltaic energy storage, achieve peak shaving and valley filling, and simultaneously provide emergency power to important loads for the plant area 302, another portion of the electricity is connected to the energy storage power station to charge it, and any excess electricity is connected to the AC distribution network through the distribution transformer and sold to the State Grid municipal power 208.

[0050] In the steam supply system 01, the distiller's grains 101 are used as biomass raw material to produce biomass natural gas 102, which is then used to produce brewing steam 301 via the first gas boiler 202. The natural gas 102 is connected to the first gas boiler 202 via b1 to provide natural gas for brewing steam 301. The photovoltaic module 207 is connected to the electric steam storage 204 in the steam supply system 01 via a4 to produce brewing steam 301. At the same time, the photovoltaic module 207 is connected to the waste heat recovery unit 206 via a7 and the high-temperature water source heat pump 205 to recycle the brewing steam 301. In addition, the steam supply system 01 recovers methane-rich biogas from the wastewater energy 104 to supply the biogas boiler 201 to produce brewing steam 301, and at the same time utilizes the seamless pressure-bearing technology built into the solar thermal collector for steam storage 401.

[0051] The cooling / heating and hot water system 03 includes a heating system, a cooling system, and a domestic hot water system 305. In the heating system, sewage treated by the sewage treatment plant is sent to the sewage source heat pump 210 to meet the basic load of the plant area heating 303. Steam is provided by the second gas boiler 209 in the boiler room as the primary medium and heat is exchanged through a heat exchanger to further meet the plant area heating 303. In the cooling system, sewage treated by the sewage treatment plant is sent to the sewage source heat pump 210 system to meet the cooling load of the winery office area. In the domestic hot water system 305, solar photovoltaic power generation 103 and PVT photovoltaic-thermal integrated heat pump 212 are used to produce domestic hot water 305, and air source heat pump 211 is used as an auxiliary heat source to ensure a continuous and stable supply of heat.

[0052] In this invention, the winery's power supply, grid, load, and storage systems are configured as follows:

[0053] Sources: Distillers' grains 101, Natural gas 102, Solar energy 103, Wastewater energy 104.

[0054] Network: Biogas boiler 201, First gas boiler 202, Solar collector 103, Electric steam storage 204, High-temperature water source heat pump 205, Waste heat recovery unit 206, Photovoltaic module 207, State Grid municipal power 208, Second gas boiler 209, Sewage source heat pump 210, Air source heat pump 211, PVT photovoltaic-thermal integrated heat pump 212.

[0055] Items include: brewing steam 301, factory electricity 302, factory heating 303, factory cooling 304, and domestic hot water 305.

[0056] Storage: Steam storage 401, Electricity storage 402, Hot water storage 403.

[0057] In this invention, the integrated energy system includes multiple energy-consuming sectors such as power supply, gas supply, heating, cooling, and industrial steam. Each sector further comprises various energy supply methods, including photovoltaic power generation, grid power supply, energy storage devices, waste heat utilization, electric-driven heat pumps, and piped natural gas. In traditional energy supply systems, these sectors and energy supply methods are either independent or partially interconnected, resulting in simple collaborative control logic. Furthermore, design goals often prioritize single-point static supply capacity, leading to low energy efficiency, resource waste, large capacity of various energy supply facilities, and high investment costs. To construct a new energy system for the brewing industry, addressing the energy needs and characteristics of wineries and ensuring their successful achievement of carbon peaking and carbon neutrality goals, this invention focuses on the optimized configuration of integrated multi-energy systems during the brewing process. It specifically addresses the system optimization configuration of solar energy, waste heat from the winery, and high-efficiency high-temperature electric heat pumps for steam supply, achieving energy-saving and emission-reduction technological transformation of the brewing steam heat energy supply system. By fully utilizing resources such as vacant rooftops in the winery, photovoltaic power generation facilities are deployed to replace some fossil fuel consumption, constructing a highly efficient renewable energy power system integrating photovoltaics, energy storage, direct current, and flexible energy. A novel waste heat high-temperature heat pump technology is adopted, using electrically driven heat pumps to further improve the recovery and utilization of waste heat from brewing. High-temperature waste heat heat pumps are used to produce steam, replacing some fossil fuel consumption, increasing the enterprise's steam sources, ensuring the security of steam supply, and constructing a new energy system suitable for the green and low-carbon development of brewing enterprises.

[0058] This invention also provides an operation method for an integrated energy system based on a winery industrial park, comprising three main systems:

[0059] like Figure 2As shown, the long-cycle thermal storage system uses solar energy to supply solar collectors for steam in the brewing process during the winery's operating period. During the summer months of June, July, and August, when the winery is shut down, the solar collectors absorb solar radiation when solar radiation is abundant. The water is heated to 90-95°C through a medium heat exchanger and then pumped into an underground thermal storage device by a primary circulating water pump. After production and office operations resume, the water is used to provide domestic hot water for the park or for preheating steam production.

[0060] like Figure 3 As shown, during the 8-hour daily shutdown of the short-cycle heating system, to fully utilize photovoltaic energy storage and achieve peak shaving and valley filling, while simultaneously providing emergency power to critical loads within the winery, the energy storage batteries are charged through both photovoltaic power within the winery and mains power. During the 16-hour daily production period, daily electricity consumption is coupled with photovoltaic power generation. The photovoltaic power is used to power other equipment within the plant area, such as high-temperature water source heat pumps, electric steam storage, the winery's own electricity, heating and cooling systems, and domestic hot water systems. Any shortfall in electricity is supplemented by mains power.

[0061] like Figure 4 As shown, the PVT photovoltaic / solar thermal integrated heat storage control and operation method utilizes solar radiation to perform photothermal conversion through a collector, raising low-grade heat energy to a higher grade (55℃) to produce hot water for the plant's domestic hot water load. Any waste heat is then pumped through a primary circulating water pump to an underground heat storage device for use in the park's heating needs.

[0062] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0063] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0064] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A comprehensive energy system based on the integrated source-grid-load-storage model for a winery industrial park, characterized in that: This includes solar-storage direct-drive flexible systems, steam supply systems, and cooling / heating and hot water supply systems; The photovoltaic-storage-direct-flexible system includes solar energy, photovoltaic modules, factory power supply, energy storage power station, solar collectors, electric steam storage, high-temperature water source heat pump, sewage source heat pump, and air source heat pump. The steam supply system includes a distiller's grains, natural gas, biogas boiler, first gas boiler, solar collector, electric steam storage, high-temperature water source heat pump, waste heat recovery unit, brewing steam, and steam storage. The cooling / heating and hot water system includes wastewater energy, a second gas boiler, a wastewater source heat pump, an air source heat pump, a PVT photovoltaic-thermal integrated heat pump, domestic hot water, plant heating, plant cooling, and hot water storage. In the photovoltaic-storage-direct-flexible system, the solar energy is connected to the solar collector in the steam supply system to supply solar thermal steam for brewing; the solar energy is connected to the PVT photovoltaic-thermal integrated heat pump to supply solar thermal hot water for domestic use; the solar energy is connected to the photovoltaic modules to supply solar thermal power generation, and the photovoltaic modules are connected to the electric steam storage system in the steam supply system to supply power for brewing steam; the photovoltaic modules are also connected to a high-temperature water source heat pump, which is connected to a waste heat recovery unit to produce brewing steam; the photovoltaic modules are also connected to the sewage source heat pump and air source heat pump in the cooling / heating and hot water supply system to supply power, and the photovoltaic modules are also connected to the factory's electricity supply. In the steam supply system, the lees are used as biomass raw material to produce biomass natural gas, which is then used to produce brewing steam through the first gas boiler. The natural gas is connected to the first gas boiler to produce brewing steam, and the wastewater can be connected to the biogas boiler to produce brewing steam. At the same time, the steam supply system uses solar collectors to store steam. In the cooling / heating and hot water system, wastewater can be connected to a wastewater source heat pump to meet the basic load of heating and cooling in the plant area. Steam is provided by a second gas boiler connected to natural gas as the primary medium, and heat is exchanged through a heat exchanger to further meet the heating needs of the plant area. PVT photovoltaic-thermal integrated heat pump produces domestic hot water, while an air source heat pump connected to photovoltaic modules serves as an auxiliary heat source to ensure a continuous and stable supply of domestic hot water.

2. The integrated energy system based on the source-grid-load-storage system of a winery industrial park as described in claim 1, characterized in that, The photovoltaic-storage-DC-flexible system includes the State Grid municipal power grid, and the photovoltaic modules are connected to the State Grid municipal power grid through a distribution transformer.

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