High-temperature steam heat pump wine brewing system capable of efficiently recycling waste heat

Abstract

The utility model discloses a high-temperature steam heat pump brewing system capable of efficiently recovering waste heat, which comprises a boiler, a wine retort, a wine collecting barrel, a first heat exchanger and a heat pump device, the heat pump device comprises an evaporator, a compressor, a condenser and an expansion valve, a first heat exchange coil is wrapped outside the evaporator, and a second heat exchange coil is wrapped outside the compressor. One end of the wine retort is connected with the boiler, the other end of the wine retort is connected with the top of the first heat exchanger, and the bottom of the first heat exchanger is connected with the wine collecting barrel. A traditional boiler steam system and a waste heat recovery high-temperature steam heat pump are combined to form a complete wine brewing system, the two steam systems converge at the steam header, then steam is supplied to the wine brewing system, heat energy discharged when wine steam is cooled is fully used for steaming grains in a wine retort, a large amount of boiler steam can be saved, and energy is saved. Energy can be effectively saved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of brewing, specifically to a high-temperature steam heat pump brewing system with high-efficiency heat recovery. Background Technology

[0002] In the traditional production process of baijiu, the main energy consumption is the steam used in the distillation stage, and the steam mainly comes from boilers that burn natural gas or coal, accounting for about 80% of the company's carbon emissions.

[0003] In existing technology, steam flows into the still to steam the grains. The resulting alcohol vapor releases heat through heat exchange and becomes high-temperature liquor. Then, the high-temperature liquor is cooled down to normal temperature and collected in a collection tank.

[0004] There is an energy difference in the above production process, and how to make reasonable use of the energy difference to achieve energy conservation is an urgent problem to be solved. Utility Model Content

[0005] The purpose of this invention is to provide a high-temperature steam heat pump brewing system with excellent energy-saving effect and efficient waste heat recovery.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature steam heat pump brewing system for efficient waste heat recovery, comprising a boiler, a still, and a collection tank, including a first heat exchanger and a heat pump device. The heat pump device includes an evaporator, a compressor, a condenser, and an expansion valve. The evaporator is wrapped with a first heat exchange coil. One end of the still is connected to the boiler, and the other end is connected to the top of the first heat exchanger. The bottom of the first heat exchanger is connected to the collection tank. The first heat exchanger is connected to the first heat exchange coil.

[0007] In the above technical solution, the evaporator, compressor, condenser, and expansion valve of the heat pump device are connected by refrigerant pipes.

[0008] A preferred technical solution includes a steam distribution cylinder, a hot water tank, a second heat exchanger, a hot water valve, and a second heat exchange coil. The second heat exchanger is disposed between the condenser and the compressor. The steam distribution cylinder is disposed between the boiler and the still. The steam distribution cylinder and the boiler are respectively connected to the hot water tank, and the steam distribution cylinder is connected to the second heat exchanger. The second heat exchange coil is wrapped around the condenser. The hot water tank is connected to the second heat exchange coil. The hot water tank is connected to the hot water valve, and the hot water valve is connected to a third steam valve and the second heat exchanger.

[0009] A preferred technical solution includes an acid flushing device, one end of which is connected to the still and the other end is connected to the first heat exchange coil.

[0010] In the above technical solution, the steam inlet of the acid flushing device is connected to the steam outlet of the still, the steam outlet of the acid flushing device is connected to the water inlet pipe of the first heat exchange coil, and a loop is also provided at the bottom of the acid flushing device, which is connected to the water outlet pipe of the first heat exchange coil.

[0011] In a preferred embodiment, a first steam valve is provided between the still and the first heat exchanger.

[0012] In a further technical solution, the hot water tank is provided with a water inlet pipe, and a water supply pump is provided between the water tank and the second heat exchange coil.

[0013] In a further technical solution, a second steam valve is provided between the still and the acid flushing device.

[0014] In a preferred embodiment, a third heat exchange coil is provided at the bottom of the first heat exchanger, the third heat exchange coil is connected to a cooling water pipe, and a flow regulating valve is provided on the cooling water pipe.

[0015] The working principle of this utility model:

[0016] Steam flows into the still to steam the grains. The resulting steam enters the first heat exchanger through the first steam valve, releasing heat to become high-temperature liquor. In the latter half of the first heat exchanger, the third heat exchanger cools the high-temperature liquor down to normal temperature, which is then collected in the collection tank. The third heat exchanger coil is equipped with a flow regulating valve, which can adjust the temperature of the liquor to ensure the quality of the finished product.

[0017] Due to the design of the first heat exchange coil, the heat required to cool the wine vapor into high-temperature wine liquid is absorbed by the refrigerant in the evaporator of the high-temperature steam heat pump. This refrigerant then enters the compressor and is compressed into high-temperature, high-pressure superheated refrigerant vapor. This superheated vapor passes through the second heat exchanger and then enters the high-temperature condenser, where it releases the absorbed heat to the hot water in the second heat exchange coil outside the condenser, turning it into steam exceeding 100°C. This steam is then heated by the high-temperature, high-pressure refrigerant vapor in the second heat exchanger, becoming superheated steam. The superheated steam then enters the steam distribution cylinder through pipes to participate in the brewing process.

[0018] As the brewing process nears its end, the first steam valve closes and the second steam valve opens to perform the acid flushing process. The cooled tail liquor is generally discharged directly, and the heat released during cooling is still absorbed by the evaporator of the heat pump.

[0019] Initially, the system's steam supply is generated by a boiler. Simultaneously, the boiler's steam enters the hot water tank to produce hot water. A pressure control valve is installed on the pipeline from the steam distribution cylinder to the hot water tank. The heat pump absorbs heat from the steam. When the heat pump has not reached its normal operating temperature, the third steam valve closes, and the hot water valve opens, allowing the hot water heated by the condenser to flow back to the hot water tank, continuously circulating and gradually increasing the temperature of the hot water in the tank. When the hot water tank temperature reaches approximately 85℃, the heat pump enters its normal operating state, producing steam instead of hot water. At this point, the hot water valve closes, and the third steam valve opens to supply steam to the steam distribution cylinder. A variable frequency water pump is installed on the pipeline between the hot water tank and the high-temperature condenser to adapt to the steam demand under different operating conditions.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. This utility model combines a traditional boiler steam system and a waste heat recovery high-temperature steam heat pump to form a complete brewing system. The two steam systems merge in the steam distribution cylinder and then supply steam to the brewing system. It makes full use of the heat energy discharged when the wine steam is cooled for steaming the grain in the still, which can save a lot of boiler steam, effectively save energy and reduce production costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] In the diagram: 1. Boiler; 2. Distillation still; 3. Distillation tank; 4. Evaporator; 5. Compressor; 6. Condenser; 7. Expansion valve; 8. First heat exchanger; 9. Steam distribution cylinder; 10. Hot water tank; 11. Hot water valve; 12. First steam valve; 13. Second steam valve; 14. Third steam valve; 15. Water supply pump; 16. Acid flushing device; 17. Second heat exchanger. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Examples, such as Figure 1As shown. A high-temperature steam heat pump brewing system with efficient waste heat recovery includes a boiler 1, a still 2, and a wine collection tank 3. It includes a first heat exchanger 8 and a heat pump device. The heat pump device includes an evaporator 4, a compressor 5, a condenser 6, and an expansion valve 7. The evaporator 4 is wrapped with a first heat exchange coil. One end of the still 2 is connected to the boiler 1 and the other end is connected to the top of the first heat exchanger 8. The bottom of the first heat exchanger 8 is connected to the wine collection tank 3. The first heat exchanger 8 is connected to the first heat exchange coil.

[0026] The evaporator 4, compressor 5, condenser 6, and expansion valve 7 of the heat pump unit are connected via refrigerant pipes. A water supply pump 15 is installed on the water supply line from the first heat exchanger 8 to the first heat exchange coil.

[0027] It includes a steam distribution cylinder 9, a hot water tank 10, a second heat exchanger, a hot water valve 11, and a second heat exchange coil. The second heat exchanger is located between the condenser 6 and the compressor 5. The steam distribution cylinder 9 is located between the boiler 1 and the still 2. The steam distribution cylinder 9 and the boiler 1 are respectively connected to the hot water tank 10 and the second heat exchanger. The second heat exchange coil is wrapped around the condenser 6. The hot water tank 10 is connected to the second heat exchange coil and the hot water tank 10 is connected to the hot water valve 11. The hot water valve 11 is connected to a third steam valve 14 and the second heat exchanger.

[0028] It includes an acid flushing device, one end of which is connected to the still 2 and the other end is connected to the first heat exchange coil.

[0029] The steam inlet of the acid flushing device is connected to the steam outlet of the still 2, and the steam outlet of the acid flushing device is connected to the water inlet pipe of the first heat exchange coil. A loop is also provided at the bottom of the acid flushing device, which is connected to the water outlet pipe of the first heat exchange coil.

[0030] A first steam valve 12 is provided between the still 2 and the first heat exchanger 8.

[0031] A water inlet pipe is installed on the hot water tank 10, and a water supply pump 15 is installed between the water tank and the second heat exchange coil.

[0032] A second steam valve 13 is installed between the still 2 and the acid flushing device.

[0033] How to use this embodiment:

[0034] When the system is started, boiler 1 first generates steam. The steam passes through steam distributor 9, with part of it entering the still 2 and part entering the hot water tank 10 to generate hot water.

[0035] Steam flows into the still 2 to steam the grain. The resulting steam enters the first heat exchanger 8 through the first steam valve 12, releasing heat and turning into high-temperature liquor. In the latter half of the first heat exchanger 8, the high-temperature liquor is cooled again by the third heat exchanger to a normal temperature, which is then collected by the collection tank 3. The third heat exchanger coil is equipped with a flow regulating valve, which can adjust the temperature of the liquor to ensure the quality of the liquor.

[0036] Due to the design of the first heat exchange coil, the heat required to cool the wine vapor into high-temperature wine liquid is absorbed by the refrigerant in the evaporator 4 of the high-temperature steam heat pump. This refrigerant then enters the compressor 5 and is compressed into high-temperature, high-pressure superheated refrigerant vapor. This superheated vapor passes through the second heat exchanger and then enters the high-temperature condenser 6, where it releases the absorbed heat to the hot water in the second heat exchange coil outside the condenser 6, turning it into water vapor exceeding 100°C. This water vapor is then heated by the high-temperature, high-pressure refrigerant vapor in the second heat exchanger, becoming superheated steam. The superheated steam then enters the steam distribution cylinder 9 through pipes to participate in the brewing process.

[0037] The heat pump absorbs heat from the vapors of alcohol. When the heat pump has not reached its normal operating temperature, the third steam valve 14 closes and the hot water valve 11 opens, allowing the hot water heated by the condenser 6 to flow back to the hot water tank 10. This continuous circulation gradually increases the temperature of the hot water in the tank 10. When the temperature of the hot water tank 10 reaches approximately 85°C, the heat pump enters its normal operating state, producing steam instead of hot water. At this point, the hot water valve 11 closes and the third steam valve 14 opens to send steam to the steam distribution cylinder 9.

[0038] As the brewing process nears its end, the first steam valve 12 closes and the second steam valve 13 opens to perform the acid flushing process. The cooled tail liquor is generally discharged directly, and the heat released during cooling is still absorbed by the evaporator 4 of the heat pump.

Claims

1. A high-temperature steam heat pump brewing system with efficient waste heat recovery, comprising a boiler, a still, and a collection tank, characterized in that: It includes a first heat exchanger and a heat pump device. The heat pump device includes an evaporator, a compressor, a condenser, and an expansion valve. The evaporator is wrapped with a first heat exchange coil. One end of the still is connected to the boiler and the other end is connected to the top of the first heat exchanger. The bottom of the first heat exchanger is connected to the wine collection tank. The first heat exchanger is connected to the first heat exchange coil.

2. The high-temperature steam heat pump brewing system for efficient waste heat recovery according to claim 1, characterized in that: The system includes a steam distribution cylinder, a hot water tank, a second heat exchanger, a hot water valve, and a second heat exchange coil. The second heat exchanger is located between the condenser and the compressor. The steam distribution cylinder is located between the boiler and the still. The steam distribution cylinder and the boiler are respectively connected to the hot water tank, and the steam distribution cylinder is connected to the second heat exchanger. The second heat exchange coil is wrapped around the condenser. The hot water tank is connected to the second heat exchange coil and the hot water valve. The hot water valve is connected to a third steam valve and the second heat exchanger.

3. The high-temperature steam heat pump brewing system for efficient waste heat recovery according to claim 1, characterized in that: It includes an acid flushing device, one end of which is connected to the still and the other end is connected to the first heat exchange coil.

4. The high-temperature steam heat pump brewing system for efficient waste heat recovery according to claim 1, characterized in that: A first steam valve is provided between the still and the first heat exchanger.

5. A high-temperature steam heat pump brewing system for efficient waste heat recovery according to claim 2, characterized in that: The hot water tank is equipped with a water inlet pipe, and a water supply pump is installed between the water tank and the second heat exchange coil.

6. The high-temperature steam heat pump brewing system for efficient waste heat recovery according to claim 3, characterized in that: A second steam valve is provided between the still and the acid flushing device.

7. A high-temperature steam heat pump brewing system for efficient waste heat recovery according to claim 1, characterized in that: The first heat exchanger is provided with a third heat exchange coil at the bottom, and the third heat exchange coil is connected to a cooling water pipe, and a flow regulating valve is provided on the cooling water pipe.

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