A comprehensive system for utilizing industrial waste heat in the liquor brewing industry

Abstract

This utility model discloses a comprehensive industrial waste heat utilization system for the liquor brewing industry. It includes a two-stage high-temperature heat pump and a heat exchanger connected to the process equipment. The two-stage high-temperature heat pump is connected to a first-stage low-temperature heat pump, which is connected to the fan coil units of an office building via pipelines, with a water pump II installed on the connecting pipelines. A control valve I and water pump I are connected between the heat exchanger and the office building's underfloor heating pipes. A control valve IX is connected between the process equipment and the heat exchanger. A bypass valve is also installed between the process equipment and the heat exchanger, connecting to a scrubbing tower. Control valves are installed at both the front and rear ends of the scrubbing tower, and a chimney is connected to the rear of the scrubbing tower. The process equipment is also connected to the two-stage high-temperature heat pump, with a water pump V connecting them. This utility model utilizes a two-stage heat pump unit to achieve not only cooling of the plant area but also heating and full-condition operation of the process heat source, realizing the comprehensive recycling and utilization of energy.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, specifically to a comprehensive utilization system for industrial waste heat in the liquor brewing industry. Background Technology

[0002] In the traditional process of brewing baijiu (Chinese white liquor), distillation is required. Furthermore, a significant amount of waste heat is continuously released during the cooling process, which can be recycled as a heat source for a heat pump, thus achieving efficient operation.

[0003] During the brewing of baijiu (Chinese liquor), the temperature of the distillation exhaust gas is typically between 80℃ and 100℃, with the specific temperature depending on the distillation equipment, process, and operating conditions. The following are some factors that affect the temperature of this distillation exhaust gas: 1. Distillation equipment: The exhaust gas temperature may differ between traditional stills and modern continuous distillation equipment, but the overall temperature remains above 80℃; 2. Raw materials and mash: The degree of fermentation of different raw materials and mash will affect the temperature during distillation; 3. Operating conditions: Operating parameters such as heating rate and steam pressure will also affect the exhaust gas temperature.

[0004] Currently, the distillation process in baijiu production requires a large amount of heat, resulting in significant waste heat being released during the cooling process, impacting the environment and wasting energy. Furthermore, the water temperature during distillation must be strictly controlled between 75 and 85 degrees Celsius. Excessive temperature leads to incomplete alcohol evaporation, affecting the taste of the baijiu; conversely, insufficient temperature prolongs distillation time, also negatively impacting the final product. Therefore, the temperature of the distillation exhaust gas is typically set between 80 and 100 degrees Celsius.

[0005] Based on the summary and analysis of the above-mentioned current technology, it is necessary for those skilled in the art to properly handle the high-temperature waste heat generated during the existing brewing process, while ensuring the production temperature required for brewing. Therefore, this technical solution adopts a brewing waste heat recovery process for optimization to improve energy utilization efficiency. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a comprehensive industrial waste heat utilization system for the liquor brewing industry. It utilizes a two-stage heat pump unit to realize the full-condition operation of the plant area for cooling, heating and process heat source. It utilizes the excess cooling capacity of the cooling tower in winter to replace the first-stage heat pump for heat dissipation of the second-stage high-temperature heat pump unit, and adds multi-functional heat exchange equipment to realize the comprehensive recycling of energy.

[0007] A comprehensive industrial waste heat utilization system for the liquor brewing industry includes process equipment. The process equipment is connected to a secondary high-temperature heat pump and a heat exchanger. The secondary high-temperature heat pump is connected to a primary low-temperature heat pump, which is connected to a fan coil unit in an office building via pipelines, with a water pump II installed on the connecting pipelines. A control valve I and water pump I are connected between the heat exchanger and the office building's underfloor heating pipes. A control valve IX is connected between the process equipment and the heat exchanger. A bypass valve is also installed between the process equipment and the heat exchanger, and the bypass valve is connected to a scrubbing tower. Control valves are installed at both the front and rear ends of the scrubbing tower, and a chimney is connected to the rear of the scrubbing tower. A scrubbing bypass valve is also installed on the scrubbing tower and connected to the chimney. The process equipment is also connected to the secondary high-temperature heat pump, with a water pump V connecting the two.

[0008] An industrial tower connects the secondary high-temperature heat pump and the primary low-temperature heat pump. The industrial tower is also connected to other process equipment. Valves are installed on both the inlet and return water pipes connecting to the industrial tower. Corresponding to the return water pipes of the industrial tower, when connecting to the secondary high-temperature heat pump and the primary low-temperature heat pump, a water pump III and a control valve IV are respectively installed for the primary low-temperature heat pump, and a water pump IV and a control valve V, as well as a control valve II and a control valve III, are installed for the secondary high-temperature heat pump. A bypass pipe is installed between the secondary high-temperature heat pump and the primary low-temperature heat pump to bypass the water pump III and control valves IV and V, and a control valve VI is installed on this bypass pipe.

[0009] The heat exchange equipment includes a housing containing a heat-conducting liquid and an exhaust pipe connected to the outside of the housing. The exhaust pipe has several branches inside the housing, and each branch is connected to several high-temperature nozzles. The housing is also connected to an exhaust pipe. The heat exchange equipment also contains several heat exchange tubes, which are connected to the underfloor heating pipes of the external office building.

[0010] The beneficial effects of this utility model are as follows: This utility model connects a secondary high-temperature heat pump and a heat exchange device to the process equipment; the secondary high-temperature heat pump is connected to a primary low-temperature heat pump, which is connected to the office building fan coil unit via a pipeline, and a water pump II is installed on the connecting pipeline; a control valve I and a water pump I are connected between the heat exchange device and the office building floor heating pipes; a control valve IX is connected between the process equipment and the heat exchange device, and a bypass valve is also installed between the process equipment and the heat exchange device, connecting the bypass valve to a scrubbing tower; control valves are installed at both the front and rear ends of the scrubbing tower, and a chimney is connected to the rear side of the scrubbing tower; a scrubbing bypass valve is also installed on the scrubbing tower and connected to the chimney; the process equipment is also connected to the secondary high-temperature heat pump, and a water pump V is installed for the management between the two. This utility model utilizes a two-stage heat pump unit to not only achieve cooling in the factory area, but also to simultaneously provide heating and process heat source operation under all conditions. In winter, it utilizes the excess cooling capacity of the cooling tower to replace the first-stage heat pump for heat dissipation in the second-stage high-temperature heat pump unit. By adding multifunctional heat exchange equipment such as heat exchange devices and washing towers, it achieves comprehensive recycling of energy, reduces energy consumption, and ensures the initial temperature during the liquor distillation process. It overcomes many technical drawbacks in the existing technology and is an ideal industrial waste heat comprehensive utilization system for the liquor brewing industry. Attached Figure Description

[0011] The structure of the device of this utility model will be further described below with reference to the accompanying drawings.

[0012] Figure 1 This is a schematic diagram of the system connection structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the connection structure of the heat exchange equipment;

[0014] Figure 3 This is a schematic diagram of the summer process flow;

[0015] Figure 4 This is a schematic diagram of the process flow structure in winter.

[0016] Figure 5 This is a schematic diagram of the process flow structure during the transitional season;

[0017] 1. Process equipment; 11. Control valve X; 12. Water pump V; 2. Office building; 21. Underfloor heating pipe; 22. Water pump I; 23. Control valve I; 3. Primary low-temperature heat pump; 31. Water pump II; 32. Control valve VI; 4. Secondary high-temperature heat pump; 41. Control valve II; 42. Control valve III; 5. Industrial tower; 51. Control valve VII; 52. Control valve VIII; 53. Control valve V; 54. Water pump IV; 55. Control valve IV; 56. Water pump III; 6. Scrubber tower; 61. Terminal control valve; 62. Control valve XI; 63. Control valve XII; 7. Heat exchange equipment; 71. Control valve IX; 72. Coil; 73. Exhaust pipe; 74. Exhaust pipe; 75. Branch pipe; 76. High-temperature nozzle; 8. Chimney. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings.

[0019] Example 1: System Connection Structure

[0020] A comprehensive system for utilizing industrial waste heat in the liquor brewing industry, such as Figure 1 , 2 As shown, it includes process equipment 1, on which a secondary high-temperature heat pump 4 and a heat exchanger 7 are connected; the secondary high-temperature heat pump 4 is connected to a primary low-temperature heat pump 3, and the primary low-temperature heat pump 3 is connected to a fan coil unit in office building 2 via a pipeline, with a water pump II 31 installed on the connecting pipeline; the heat exchanger 7 is connected to the underfloor heating pipes in office building 2 via a control valve I 23 and a water pump I 22; the process equipment 1 and the heat exchanger 7 are connected via a control valve IX 71. A control valve X11 is also provided between the process equipment 1 and the heat exchange equipment 7 as a bypass valve. The control valve X11 is connected to the scrubbing tower 6. The front and rear ends of the scrubbing tower 6 are equipped with control valves, namely the terminal control valve 61 and the control valve XI 62, respectively. The rear side of the scrubbing tower 6 is connected to the chimney 8. A control valve XII is also provided on the scrubbing tower 6 as a scrubbing bypass valve and connected to the chimney 8. The process equipment 1 is also connected to the secondary high-temperature heat pump 4, and a water pump V12 is provided for the management between the two.

[0021] The secondary high-temperature heat pump 4 and the primary low-temperature heat pump 3 are connected by an industrial tower 5, which is also connected to other process equipment. Valves are installed on the inlet and return water pipes connecting to the industrial tower 5, namely control valve VII 51 and control valve VIII 52, respectively. Corresponding to the return water pipe of the industrial tower 5, when connecting to the secondary high-temperature heat pump 4 and the primary low-temperature heat pump 3, water pump III 56 and control valve IV 55 are installed for the primary low-temperature heat pump 3, and water pump IV 54 and control valve V 53, as well as control valve II 41 and control valve III 42 are installed for the secondary high-temperature heat pump 4. A bypass pipe is installed between the secondary high-temperature heat pump 4 and the primary low-temperature heat pump 3 to bypass water pump III 56, control valve IV 55, and control valve V 53, and control valve VI 32 is installed on the bypass pipe.

[0022] Furthermore, this utility model also discloses a heat exchange device 7, which includes a housing containing a heat-conducting liquid. An exhaust pipe 73 is connected to the outside of the housing. The exhaust pipe 73 has several branch pipes 75 inside the housing, and each branch pipe 75 is connected to several high-temperature nozzles 76. The housing is also connected to an exhaust pipe 74. The heat exchange device 7 also contains several heat exchange pipes 72, which are connected to the underfloor heating pipes 21 inside the external office building 2. This structure, when connected, constitutes a waste heat recovery system usable in both summer and winter.

[0023] Example 2: Summer Operation

[0024] like Figure 3 As shown, during hot summer use, the first-stage low-temperature heat pump 3, the second-stage high-temperature heat pump 4, and the scrubbing tower 6 are turned on. The first-stage low-temperature heat pump 3 and the second-stage high-temperature heat pump 4 are connected in series. The first-stage low-temperature heat pump 3 is responsible for the cooling of the office building, and the second-stage high-temperature heat pump 4 is responsible for the hot water demand of the process equipment. The high-temperature exhaust gas generated by the process equipment 1 is purified by the air scrubbing tower 6 and then discharged through the chimney 8. The on / off status of each control valve and pump is as follows: control valve I 23 is closed, water pump I 22 is closed, control valve V 53 is closed, control valve IV 55 is closed, water pump III 56 is closed, control valve VII 51 is closed, control valve VIII 52 is closed, control valve IX 71 is closed, and control valve XII 62 is closed.

[0025] Example 3: Winter Operation

[0026] like Figure 4As shown, when used in cold winter, the residual water valve of industrial tower 5 and the secondary high-temperature heat pump 4 are opened, and the high-temperature exhaust gas generated by process equipment 1 is used to heat the floor heating pipes 21 in office building 2 through heat exchange equipment 7, thereby providing a heat source for heating. After the high-temperature exhaust gas has completed heat exchange, the low-temperature exhaust gas is discharged through chimney 8. The on / off status of each control valve and pump is as follows: control valve II 41 is closed, control valve IV 55 is closed, control valve VI 32 is closed, control valve X 11, control valve XI 62, terminal control valve 61 is closed, water pump II 31 is closed, and water pump III 56 is closed.

[0027] Example 4: Transitional Seasonal Operating Conditions

[0028] like Figure 5 As shown, during spring or autumn, transitional operation is required; at this time, the residual water valve of industrial tower 5 and the secondary high-temperature heat pump 4 are opened, and the high-temperature exhaust gas discharged from process equipment 1 is discharged through chimney 8 after being purified by the air scrubbing tower; control valve I 23 is closed, control valve II 41 is closed, control valve IV 55 is closed, control valve VI 32, control valve IX 71 is closed, control valve XII 62 is closed, water pump I 22 is closed, water pump II 31 is closed, and water pump III 56 is closed.

[0029] This utility model utilizes a two-stage heat pump unit to not only achieve cooling in the factory area, but also to simultaneously provide heating and process heat source operation under all conditions. In winter, it utilizes the excess cooling capacity of the cooling tower to replace the first-stage heat pump for heat dissipation in the second-stage high-temperature heat pump unit. By adding multifunctional heat exchange equipment such as heat exchange devices and washing towers, it achieves comprehensive recycling of energy, reduces energy consumption, and also ensures the initial temperature during the liquor distillation process. It overcomes many technical drawbacks in the existing technology.

Claims

1. A comprehensive utilization system of industrial waste heat in the Baijiu brewing industry, characterized in that: It includes process equipment, on which a secondary high-temperature heat pump and a heat exchanger are connected; the secondary high-temperature heat pump is connected to a primary low-temperature heat pump, which is connected to the office building's fan coil units via pipelines, and a water pump II is installed on the connecting pipelines; a control valve I and a water pump I are connected between the heat exchanger and the office building's underfloor heating pipes; a control valve IX is connected between the process equipment and the heat exchanger; a bypass valve is also installed between the process equipment and the heat exchanger, and the bypass valve is connected to a scrubbing tower; control valves are installed at both the front and rear ends of the scrubbing tower, and a chimney is connected to the rear side of the scrubbing tower; a scrubbing bypass valve is also installed on the scrubbing tower and connected to the chimney; the process equipment is also connected to the secondary high-temperature heat pump, and a water pump V is installed for the management between the two. ​ 2.The industrial waste heat comprehensive utilization system for Baijiu brewing industry according to claim 1, characterized in that: An industrial tower connects the secondary high-temperature heat pump and the primary low-temperature heat pump, and the industrial tower is also connected to process equipment. Valves are installed on both the inlet and return water pipes connecting to the industrial tower. Corresponding to the return water pipes of the industrial tower, when connecting to the secondary high-temperature heat pump and the primary low-temperature heat pump, a water pump III and a control valve IV are respectively installed for the primary low-temperature heat pump, and a water pump IV and a control valve V, as well as a control valve II and a control valve III, are installed for the secondary high-temperature heat pump. A bypass pipe is installed between the secondary high-temperature heat pump and the primary low-temperature heat pump to bypass the water pump III and control valves IV and V, and a control valve VI is installed on the bypass pipe. 3.The industrial waste heat comprehensive utilization system for Baijiu brewing industry according to claim 1, characterized in that: The heat exchange equipment includes a housing containing a heat-conducting liquid and an exhaust pipe connected to the outside of the housing. The exhaust pipe has several branches inside the housing, and each branch is connected to several high-temperature nozzles. The housing is also connected to an exhaust pipe. The heat exchange equipment also contains several heat exchange tubes, which are connected to the underfloor heating pipes of the external office building.

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