A high-efficiency swirl-flow indirect air-cooling system for the production of Maotai-flavor liquor

Abstract

This invention discloses a high-efficiency swirl-flow indirect air-cooling system for the production of Maotai-flavor liquor. The system includes an exhaust pipe containing spirally arranged heat exchanger channels for liquor vapor and liquor air. The liquor vapor channels are connected to a liquor vapor pipe and a liquor outlet via heat exchanger inlets and outlets, respectively. The upper and lower ends of the liquor air channels are connected to the space inside the exhaust pipe. This invention, through air-cooling modification of the distillation process in Maotai-flavor liquor production, can significantly reduce water consumption and wastewater discharge, achieving green and sustainable development for Maotai-flavor liquor. Furthermore, the patented exhaust pipe employs a "chimney" design, effectively reducing the load on the fan.

Description

Technical Field

[0001] This invention relates to a high-efficiency swirl-flow indirect air-cooling system for the production of Maotai-flavor liquor, belonging to the technical field of Maotai-flavor liquor condensation equipment. Background Technology

[0002] Because Maotai-flavor baijiu employs solid-state fermentation, its production process is unique, complex, and lengthy, involving two rounds of grain feeding, nine rounds of steaming and cooking, eight rounds of fermentation with added yeast, and seven rounds of distillation. This process results in high energy consumption and the discharge of large amounts of wastewater. Among these processes, the seven distillations consume the most energy and water. Furthermore, the cooling of the alcohol distilled from the mash during the distillation of Maotai-flavor baijiu requires a significant amount of water. According to the relevant clauses of "Water Consumption Quota Part 7: Alcohol Manufacturing" (GB / T18916.7-2014), "Guizhou Province Industry Water Consumption Quota" (DB52 / T725-2011), "General Technical Rules for Evaluating the Rational Water Use of Enterprises" (GB / T7119-1993), and the literature "Discussion on Water Consumption Quota of Guizhou Maotai Liquor", the water consumption quota for sauce-flavored liquor production enterprises represented by Maotai is 56 m3 / KL, that is, the water consumption is about 61 tons per ton of liquor produced. Even if relevant enterprises have adopted relevant energy-saving and environmental protection measures such as the recycling of cooling water, the cooling water is easily polluted by organic matter and becomes turbid and smelly, which greatly reduces the number of times the cooling water is recycled. At the same time, it adds an extra treatment process for the discharge of cooling water.

[0003] Compared with the current water cooling technology, air cooling technology has significant advantages such as better availability, less corrosion, and lower maintenance costs. Changing the distillation cooling process of Maotai liquor production from water cooling to air cooling is a feasible method that can greatly reduce water consumption and pollution, thereby achieving the goal of energy conservation and emission reduction. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-efficiency swirl-flow indirect air-cooling system for the production of Maotai-flavor liquor, so as to solve the technical problems existing in the prior art.

[0005] The technical solution adopted in this invention is as follows: a high-efficiency swirl-flow indirect air-cooling system for the production of sauce-flavored liquor, including an exhaust pipe, in which heat exchanger liquor vapor flow channels and heat exchanger liquor air flow channels are arranged in a spirally interlaced manner. The heat exchanger liquor vapor flow channels are connected to the liquor vapor pipe and the liquor outlet through the heat exchanger inlet and heat exchanger outlet, respectively. The upper and lower ends of the heat exchanger liquor air flow channels are connected to the space inside the exhaust pipe.

[0006] Furthermore, the heat exchanger's vapor flow channel maintains a gap with the exhaust pipe sidewall to form an external flow channel, and the central part of the spirally formed cylindrical surface of the heat exchanger's vapor flow channel is configured as a hollow flow channel, which is connected to the internal space of the exhaust pipe. Furthermore, the bottom end of the aforementioned exhaust pipe is connected to an air inlet, which is connected to a fan.

[0007] Furthermore, an air flow meter and an air flow regulating valve are installed on the pipe between the air inlet and the fan.

[0008] Furthermore, a spray cooling nozzle is installed at the air inlet at the bottom of the hollow flow channel, and the spray cooling nozzle is connected to a water pump and a water storage tank in sequence through pipes.

[0009] Furthermore, a liquid flow meter and a spray cooling water regulating valve are installed on the connecting pipe between the spray cooling nozzle and the water pump.

[0010] Furthermore, a temperature sensor is installed in the steam flow channel of the heat exchanger, and the temperature sensor is connected to the controller.

[0011] Furthermore, multiple temperature sensors are evenly spaced along the vertical direction of the heat exchanger's vapor flow channel.

[0012] Furthermore, the heat exchanger is provided with multiple wine vapor flow channels and multiple wine air flow channels. The multiple wine vapor flow channels are connected to the wine vapor distributor and the liquor distributor through multiple heat exchanger inlets and multiple heat exchanger outlets, respectively. The wine vapor distributor and the liquor distributor are connected to the liquor vapor pipeline and the liquor outlet, respectively.

[0013] The beneficial effects of the present invention are as follows: Compared with the prior art, the present invention has the following advantages: 1) This invention changes the distillation cooling process of Maotai liquor production from water cooling to air cooling, which can greatly reduce water consumption and pollution, thereby achieving the goal of energy conservation and emission reduction. It can also further reduce the water quota for Maotai liquor production, which is conducive to the formulation and implementation of new emission standards for the Maotai liquor industry, eliminate outdated production capacity, and realize the green and sustainable development of Maotai liquor. The swirl-flow indirect air cooling system has a simple production process, is easy to mass-produce, has little impact on the Maotai liquor production process, and is easy to promote.

[0014] 2) Adding external and hollow flow channels allows airflow to flow upward from the middle and side walls. Combined with the spiral heat exchanger and air flow channel, this increases the heat exchange area and provides better condensation heat exchange. 3) The heat exchanger's wine vapor flow channel 5 and wine air flow channel 6, arranged in a staggered spiral pattern, greatly improve heat exchange efficiency and wine output efficiency. 4) Install a spray cooling device (consisting of spray cooling nozzles, water pump and water tank) to cope with the loss of conversion power caused by extreme high temperature weather and ensure the stability of distillation cooling; 5) Multiple temperature sensors are installed, which can measure temperature at multiple points and accurately grasp the temperature distribution of alcohol vapor, providing timely control basis for the system's temperature control strategy and improving the overall temperature control level of the system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a swirl-flow partition wall air-cooled system. Figure 2 This is a schematic diagram of the flow of a swirl-flow partitioned air-cooled system (airflow arrows point upwards, vapor flow arrows point downwards). Figure 3 This is a schematic diagram of the internal installation structure of the exhaust pipe; Figure 4 A front view schematic diagram of the installation structure inside the exhaust pipe; Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the middle AA section; Figure 6 Right view schematic diagram of the internal installation structure of the exhaust pipe; Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of the middle BB section; Figure 8 for Figure 6 Schematic diagram of the CC cross-section structure. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] Example 1: As Figure 1-8 As shown, a high-efficiency swirl-flow indirect-wall air-cooled system for the production of Maotai-flavor liquor includes an exhaust pipe 1. Inside the exhaust pipe 1 are spirally arranged heat exchanger steam channels 5 and air channels 6 (the spirally arranged steam channels 5 and air channels 6 constitute a swirl-flow indirect-wall air-cooled heat exchanger). The steam channels 5 are connected to the liquor steam pipe 2 and liquor outlet 8 via the heat exchanger inlet 4 and outlet 7, respectively. The upper and lower ends of the air channels 6 are connected to the space inside the exhaust pipe 1. The specific dimensional parameters of the swirl-flow indirect-wall air-cooled heat exchange system are determined by the liquor distillation capacity and the plant size. The exhaust pipe adopts a chimney-style design, allowing hot air to flow upwards spontaneously within the exhaust pipe, effectively reducing the fan load and lowering the operating costs of the air-cooled system. The swirl-flow indirect-wall air-cooled heat exchanger is made of rolled and welded stainless steel; the liquor flow pipes and their valves and other accessories are also made of stainless steel. The remaining parts can be made from cost-effective materials, depending on economic considerations and practicality.

[0018] To further improve the heat exchange effect, the steam flow channel 5 of the heat exchanger and the side wall of the exhaust pipe 1 are kept at a gap to form an external flow channel 21. The middle part of the spiral cylindrical surface formed by the steam flow channel 5 of the heat exchanger is set as a hollow flow channel 20. The hollow flow channel 20 is connected to the internal space of the exhaust pipe 1. The addition of the external flow channel and the hollow flow channel allows the airflow to flow upward from the middle and the side wall. Combined with the spiral air flow channel 6 of the heat exchanger, it can play a better role in condensation heat exchange. To increase the heat exchange area and liquor output efficiency, multiple liquor steam channels 5 and liquor air channels 6 are provided in the heat exchangers. These multiple liquor steam channels 5 are connected to the liquor steam distributor 3 and the liquor distributor 6 through multiple heat exchanger inlets 4 and multiple heat exchanger outlets, respectively. The liquor steam distributor 3 and the liquor distributor 6 are connected to the liquor steam pipe 2 and the liquor outlet 8, respectively. The multiple spirally staggered liquor steam channels 5 and liquor air channels 6 greatly improve the heat exchange efficiency and liquor output efficiency. Both the liquor steam distributor 3 and the liquor distributor 6 are annular pipes with inlets and outlets.

[0019] Cooling air flows upward from the exhaust pipe, heats up in the heat exchanger, and is then discharged through the exhaust pipe. The cooled alcohol vapor flows downward, cools in the heat exchanger, and liquefies, flowing out from the liquor outlet. Overall, this system combines counter-current heat exchange with enhanced swirling heat exchange. Figure 2 As shown.

[0020] The exhaust pipe 1 is fixedly connected to a hollow conical platform at its bottom end. An air inlet 10 is connected to one side of the conical platform. The air inlet 10 is connected to a fan 17. The fan draws cold air from the outside into the exhaust pipe. An air flow meter 18 and an air flow regulating valve 19 are installed on the pipe between the air inlet 10 and the fan 17. The cooling air flow is controlled by environmental parameters (mainly air temperature and humidity), alcohol vapor temperature, alcohol vapor flow, and liquor outlet temperature. The cooling air flow can be regulated by the air flow meter 18 and the air flow regulating valve 19.

[0021] To address the power loss caused by extreme high temperatures and ensure stable cooling efficiency, a spray cooling nozzle 9 is installed at the air inlet at the bottom of the hollow flow channel. The spray cooling nozzle 9 is connected to a water pump 14 and a water tank 13 via pipes. This vortex-type air-cooled system has a spray cooling device (composed of spray cooling nozzle 9, water pump 14, and water tank 13) to cope with the power loss caused by extreme high temperatures and ensure the stability of distillation cooling. The spray cooling device is in standby mode under normal circumstances. It only starts working when the ambient temperature is too high, causing the cooling power to decrease and the liquor outlet temperature to exceed the set value. Its working time and spray volume are controlled by the liquor vapor temperature, liquor vapor flow rate, and liquor outlet temperature. To control the spray state and spray volume, a liquid flow meter 15 and a spray cooling water regulating valve 16 are installed on the connecting pipe between the spray cooling nozzle 9 and the water pump 14.

[0022] Temperature sensors 11 are installed in the heat exchanger vapor flow channel 5, and the temperature sensors 11 are connected to the controller 12. Multiple temperature sensors 11 are evenly spaced along the vertical direction of the heat exchanger vapor flow channel 5. The arrangement of multiple temperature sensors allows for multi-point temperature measurement, accurately grasps the temperature distribution of vapor, provides timely control basis for the system's temperature control strategy, and improves the overall temperature control level of the system.

[0023] In summary, the advantages of this invention are as follows: by modifying the cooling system of the distillation process for Maotai-flavor liquor production, the water consumption quota for Maotai-flavor liquor can be greatly reduced, wastewater discharge can be decreased, and green and sustainable development of Maotai-flavor liquor can be achieved. Furthermore, the exhaust pipe of this invention adopts a "chimney" design, which can effectively reduce the load on the fan; the spray cooling device design effectively ensures the cooling effect under high-temperature conditions, exhibiting excellent stability and economy.

[0024] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of protection of the claims.

Claims

1. A high-efficiency swirl-flow indirect air-cooling system for the production of sauce-flavored liquor, characterized in that: The system includes an exhaust pipe (1), inside which are arranged spirally interlaced heat exchanger vapor flow channels (5) and air flow channels (6). The vapor flow channels (5) are connected to the liquor steam pipe (2) and liquor outlet (8) through the heat exchanger inlet (4) and heat exchanger outlet (7), respectively. The upper and lower ends of the air flow channels (6) are connected to the space inside the exhaust pipe (1). The vapor flow channels (5) and the side wall of the exhaust pipe (1) are separated to form an external flow channel. The cylindrical surface formed by the spiral of the wine vapor channel (5) is set as a hollow channel in the middle, and the hollow channel is connected to the internal space of the exhaust pipe (1); the heat exchanger wine vapor channel (5) and the heat exchanger wine air channel (6) are both provided with multiple channels. The multiple heat exchanger wine vapor channels (5) are connected to the wine vapor distributor (3) and the liquor distributor (3) through multiple heat exchanger inlets (4) and multiple heat exchanger outlets respectively. The wine vapor distributor (3) and the liquor distributor (8) are connected to the liquor vapor pipe (2) and the liquor outlet (8) respectively.

2. The high-efficiency swirl-flow indirect air-cooling system for the production of sauce-flavored liquor according to claim 1, characterized in that: An air inlet (10) is connected to the bottom of the exhaust pipe (1), and the air inlet (10) is connected to the fan (17).

3. The high-efficiency swirl-flow indirect air-cooling system for the production of sauce-flavored liquor according to claim 2, characterized in that: An air flow meter (18) and an air flow regulating valve (19) are installed on the pipe between the air inlet (10) and the fan (17).

4. The high-efficiency swirl-flow indirect air-cooling system for the production of sauce-flavored liquor according to claim 1, characterized in that: A spray cooling nozzle (9) is installed at the air inlet at the bottom of the hollow flow channel. The spray cooling nozzle (9) is connected to a water pump (14) and a water storage tank (13) in sequence through pipes.

5. The high-efficiency swirl-flow indirect air-cooling system for the production of sauce-flavored liquor according to claim 4, characterized in that: A liquid flow meter (15) and a spray cooling water regulating valve (16) are installed on the connecting pipe between the spray cooling nozzle (9) and the water pump (14).

6. The high-efficiency swirl-flow indirect air-cooling system for the production of sauce-flavored liquor according to claim 1, characterized in that: A temperature sensor (11) is installed in the steam flow channel (5) of the heat exchanger, and the temperature sensor (11) is connected to the controller (12).

7. The high-efficiency swirl-flow indirect air-cooling system for the production of sauce-flavored liquor according to claim 1, characterized in that: Temperature sensors (11) are arranged at even intervals along the vertical direction of the steam flow channel (5) of the heat exchanger.

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