Alcohol recovery automatic control device

Abstract

The utility model discloses an automatic control device for alcohol recovery. The automatic control device comprises a storage tank, a heat exchange tank and a controller, the heat exchange tank is provided with a heat medium inlet, a heat medium outlet, a mixed liquid inlet, a gaseous alcohol outlet and a liquid outlet and is communicated with the storage tank through a pipeline, an electric pump and a first electric control valve are arranged at the pipeline, a heat exchange cavity and two heat medium cavities are formed in the heat exchange tank, the heat medium cavities are distributed at the two ends of the heat exchange cavity, and a plurality of heat exchange straight pipes are arranged in the heat exchange cavity; the two ends of the heat exchange straight pipe communicate with the two heat exchange cavities correspondingly, heat media are injected into the two heat exchange cavities through the heat medium inlets correspondingly, pass through the straight pipe and then are discharged through the heat medium outlets, the heat medium inlets are provided with second electric control valves, and temperature sensors are arranged in the two heat medium cavities correspondingly. Heat exchange is carried out in the heat exchange tank with the three cavities, heat conduction is carried out through the multiple heating medium straight pipes arranged in the heat exchange cavity at intervals, mixed liquid is injected into the heat exchange cavity for heat exchange, and during heat exchange, the temperatures of the two sides are monitored in real time and fed back to the controller for comparison; after comparison, the speed of the injected hot media is adjusted according to the injection temperature of the hot media and the temperature difference between the two temperature sensors, so that it is guaranteed that the mixed solution in the heat exchange cavity is in a relatively stable state, and the alcohol separation efficiency is guaranteed.

Description

Technical Field

[0001] This utility model relates to an alcohol recovery device, and more particularly to an automatic control device for alcohol recovery. Background Technology

[0002] During alcohol recovery, the difference in boiling points between alcohol and water is used to heat the alcohol-containing solution above the boiling point of alcohol, causing the alcohol to evaporate. Then, the vapor is condensed into liquid alcohol through a condensation device, thereby achieving alcohol recovery.

[0003] Patent application number CN201110055123.1 discloses an alcohol recovery device, including a tower bottom, a tower body, and a condenser. The top of the tower bottom is connected to the bottom of the tower body. A dilute alcohol inlet is connected to one end of a flow meter via a pipe. The other end of the flow meter is connected to one end of a filter. The other end of the filter is connected to the bottom of a high-level storage tank. An alcohol inlet is provided at the top of the high-level storage tank. A reflux port is provided on the side of the top of the tower body. A pressure gauge interface b is provided at the top of the tower body. The top of the tower body is connected to the condenser via an alcohol vapor pipe. A cooling water outlet is provided on the upper part of one side of the condenser. A condensate outlet is provided on the lower part of the other side of the condenser. The condensate outlet is connected to the top of a buffer tank. A concentrated alcohol inlet and a spare port are provided at the bottom of the buffer tank. The concentrated alcohol inlet is connected to the top of the cooler. A concentrated alcohol outlet is provided at the bottom of the cooler.

[0004] The aforementioned patent cools and collects alcohol vapor by connecting it to a condenser via an alcohol vapor pipe inside the tower. However, in actual production, the mixed solution generally contains alcohol and water. Since the boiling points of alcohol and water under standard atmospheric pressure are 78.3°C and 100°C, respectively, the heat exchange efficiency and heat exchange control inside the tower play a decisive role in the effectiveness of separation. The aforementioned patent does not effectively control the heat exchange, thus failing to meet production requirements. Utility Model Content

[0005] The lack of heat exchange control in existing technologies leads to low heat exchange efficiency, which in turn affects alcohol separation. This invention provides an automatic control device for alcohol recovery.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] An automatic control device for alcohol recovery includes:

[0008] Storage tanks are used to store mixed solutions to be recycled, which facilitates centralized storage of solutions to be processed and provides a stable supply of raw materials for subsequent recycling processes.

[0009] The heat exchange tank has a heat medium inlet, a heat medium outlet, a mixed liquid inlet, a gaseous alcohol outlet, and a drain outlet. It is connected to the storage tank via a pipeline equipped with an electric pump and a first electrically controlled valve. Inside, there is a heat exchange chamber and two heat medium chambers, which are located at both ends of the heat exchange chamber. Several heat exchange straight pipes are installed in the heat exchange chamber, and the two ends of the heat exchange straight pipes are connected to the two heat exchange chambers respectively. The heat medium is injected into the two heat exchange chambers through the heat medium inlet and discharged through the heat medium outlet after passing through the straight pipes. A second electrically controlled valve is installed at the heat medium inlet. Temperature sensors are installed in both heat medium chambers. The dual heat medium chamber and heat exchange straight pipe design significantly increases the heat exchange area. Combined with real-time monitoring by temperature sensors, precise temperature control is achieved, improving alcohol evaporation efficiency.

[0010] The controller, electric pump, first electric control valve, second electric control valve, and two temperature sensors are all electrically connected to the controller, enabling integrated automatic control. By coordinating the operating parameters of each component, the stability and energy efficiency of the recycling process are optimized.

[0011] Preferably, the heat exchange tank has a hollow cylindrical structure in the middle and spherical structures at both ends. The heat medium outlet and heat medium inlet are respectively located at the spherical structures at both ends. Its internal space is separated into three chambers by two partitions: a heat exchange chamber and two heat medium chambers. Several heat exchange straight pipes are spaced apart on the two partitions. The heat exchange straight pipes pass through the partitions and are connected to the heat medium chambers on both sides. The cylindrical and spherical structures reduce fluid resistance, and the layout of the partitions and straight pipes enhances the uniformity of heat medium flow and further improves heat exchange efficiency.

[0012] Preferably, the gaseous alcohol outlet and the mixed liquid inlet are respectively located on the left and right side walls of the top of the heat exchange tank, and the liquid outlet is located on the left side wall of the bottom of the heat exchange tank. The liquid outlet is connected to a storage tank through a pipe, and a third electrically controlled valve connected to the controller is installed at the pipe. The inlet and outlet are set in separate areas to avoid gas-liquid interference. The bottom liquid outlet, together with the third electrically controlled valve, realizes automatic discharge of waste liquid and reduces residual pollution.

[0013] As a preferred option, a condenser is also included, which has a gaseous alcohol inlet, a liquid alcohol outlet, a condensate inlet and a condensate outlet, and has an isolated condensate channel and an alcohol condensation channel inside. The condensate inlet is equipped with a flow control valve connected to the controller. The dual-channel isolation design ensures that the condenser and alcohol do not come into contact, and the flow control valve precisely adjusts the condensation intensity to ensure the purity of the recovered product.

[0014] Preferably, the condensate inlet and outlet are located at the top of the condenser tank, while a reversing chamber is located at the bottom. Inside the condenser tank are two sets of condenser pipes, one connected to the condensate inlet and the other to the outlet. Both sets of condenser pipes are connected to the reversing chamber, allowing the refrigerant to enter from the condensate inlet, pass through one set of condenser pipes down into the reversing chamber, rise, pass through the other set of condenser pipes, and exit through the condensate outlet. The U-shaped double condenser pipe path extends the refrigerant residence time, and the reversing chamber promotes sufficient heat exchange, maximizing condensation efficiency. Furthermore, by setting the reversing chamber at the bottom to achieve direction changing, the need for an arc-shaped pipeline is avoided, simplifying the structure and reducing costs.

[0015] Preferably, the gaseous alcohol inlet and liquid alcohol outlet are located on the left and right sides of the side wall of the condenser, and a partition plate is provided in the middle of the condenser to isolate the internal space of the condenser into two condensing chambers. This allows the gaseous alcohol to enter the condensing chamber on one side, flow upward first, then pass through the condensing chamber on the other side, and flow downward to be condensed into liquid. The partition plate guides the gas to flow back and forth, extending the path of the gaseous alcohol in the condenser and ensuring that it is fully condensed into liquid.

[0016] Preferably, the condenser is provided with several baffles at intervals in the height direction. The baffles are semi-circular and are alternately arranged on the front and back sides of the inner wall of the condenser. The alternating baffle design creates a turbulent flow effect, increases the gas-liquid contact area and time, and further improves the condensation effect.

[0017] Preferably, the system also includes a storage tank connected to a liquid alcohol outlet via a pipe, and a fourth electrically controlled valve electrically connected to the controller is provided at the pipe. The storage tank and the fourth electrically controlled valve work together to achieve automatic collection and sealed storage of condensed alcohol, thus avoiding secondary evaporation loss.

[0018] Compared with the prior art, the advantages of this utility model are as follows: This application uses a heat exchange tank with three chambers for heat exchange. Heat is conducted through several straight heat medium pipes spaced apart in the heat exchange chambers, and the mixed liquid is injected into the heat exchange chambers for heat exchange. During heat exchange, the temperature on both sides is monitored in real time and fed back to the controller for comparison. After comparison, the injection rate of the heat medium is adjusted according to the injection temperature of the heat medium and the temperature difference between the two temperature sensors, thereby ensuring that the mixed solution in the heat exchange chamber is in a relatively stable state and ensuring the efficiency of alcohol separation. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 This is a side view of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the condenser in this application;

[0022] Figure 3 This is a cross-sectional view of the condenser in this application;

[0023] Figure 4 This is a cross-sectional view of the condenser in this application;

[0024] Figure 5 This is a cross-sectional view of the heat exchange tank in this application;

[0025] In the diagram: 10, storage tank; 20, heat exchange tank; 201, heat exchange chamber; 202, heat medium chamber; 203, heat exchange straight pipe; 30, condenser; 301, condensate inlet; 302, condensate outlet; 303, gaseous alcohol inlet; 304, liquid alcohol outlet; 305, condenser pipe; 306, reversing chamber; 307, partition plate; 40, storage tank; 01, first solenoid valve; 02, electric pump; 03, third solenoid valve; 04, fourth solenoid valve. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0027] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0028] This embodiment mainly describes the title of an automatic control device for alcohol recovery, as follows:

[0029] An automatic control device for alcohol recovery, such as Figure 1-5 As shown, it includes:

[0030] Storage tank 10 is used to store the mixed solution to be recycled, which facilitates centralized storage of the solution to be processed and provides a stable supply of raw materials for subsequent recycling processes.

[0031] The heat exchange tank 20 has a heat medium inlet, a heat medium outlet, a mixed liquid inlet, a gaseous alcohol outlet, and a drain outlet. It is connected to the storage tank 10 through a pipeline, and an electric pump 02 and a first electric control valve 01 are installed at the pipeline. Inside the tank, there is a heat exchange chamber 201 and two heat medium chambers 202. The heat medium chambers 202 are distributed at both ends of the heat exchange chamber 201. Several heat exchange straight pipes 203 are installed in the heat exchange chamber 201. The two ends of the heat exchange straight pipes 203 are connected to the two heat medium chambers 202 respectively. The heat medium is injected into the two heat medium chambers 202 through the heat medium inlet and discharged through the heat medium outlet after passing through the straight pipe. A second electric control valve is installed at the heat medium inlet. Temperature sensors are installed in both heat medium chambers 202. The design of the dual heat medium chambers 202 and the heat exchange straight pipes 203 significantly increases the heat exchange area. Combined with real-time monitoring by the temperature sensors, precise temperature control is achieved, and the alcohol evaporation efficiency is improved.

[0032] The controller, electric pump 02, first solenoid valve 01, second solenoid valve, and two temperature sensors are all electrically connected to the controller, enabling integrated automatic control. By coordinating the operating parameters of each component, the stability and energy efficiency of the recovery process are optimized. During heat exchange, a certain amount of heat exchange liquid is first pumped in by electric pump 02, and then the heat medium is introduced for heat exchange. The temperature of the mixed liquid is determined based on the temperature at the outlet of the heat medium fed back by the temperature sensor. At the same time, a temperature difference threshold is set. If the temperature difference between the two temperature sensors exceeds the maximum threshold, it indicates that the flow rate of the heat medium is too slow or the pumping speed of the mixed liquid is too fast. In this case, the pumping speed is reduced or the flow rate of the heat medium is increased until the temperature difference threshold is within the set range.

[0033] Preferably, the heat exchange tank 20 has a hollow cylindrical structure in the middle and spherical structures at both ends. The heat medium outlet and heat medium inlet are respectively located at the spherical structures at both ends. Its internal space is separated into three chambers by two partitions: a heat exchange chamber 201 and two heat medium chambers 202. Several heat exchange straight pipes 203 are spaced apart on the two partitions. The heat exchange straight pipes 203 penetrate the partitions and communicate with the heat medium chambers 202 on both sides. The cylindrical and spherical structures reduce fluid resistance, and the layout of the partitions and straight pipes enhances the uniformity of heat medium flow and further improves heat exchange efficiency.

[0034] Preferably, the gaseous alcohol outlet and the mixed liquid inlet are respectively located on the left and right sidewalls of the top of the heat exchange tank 20, and the drain outlet is located on the left sidewall of the bottom of the heat exchange tank 20. The drain outlet is connected to a storage tank via a pipe, and a third electrically controlled valve 03 connected to the controller is installed at this pipe. The separate inlet and outlet avoid gas-liquid interference. The bottom drain outlet, in conjunction with the third electrically controlled valve 03, enables automatic discharge of waste liquid and reduces residual pollution. In this embodiment, the storage tank and the storage tank 10 are shared to allow for multiple separations of the mixed liquid in the tank before discharge.

[0035] As a preferred option, a condenser 30 is also included, which has a gaseous alcohol inlet 303, a liquid alcohol outlet 304, a condensate inlet 301 and a condensate outlet 302, and has an isolated condensate channel and an alcohol condensation channel inside. A flow control valve connected to the controller is provided at the condensate inlet 301. The dual-channel isolation design ensures that the condenser and alcohol do not come into contact, and the flow control valve precisely adjusts the condensation intensity to ensure the purity of the recovered product.

[0036] Preferably, the condensate inlet 301 and condensate outlet 302 are located at the top of the condenser tank 30, and the bottom of the condenser tank 30 is provided with a reversing cavity 306. The condenser tank 30 has two sets of condenser pipes 305 that are respectively connected to the condensate inlet 301 and the condensate outlet 302. Both sets of condenser pipes 305 are connected to the reversing cavity 306, so that the refrigerant enters from the condensate inlet 301, descends through one set of condenser pipes 305 to the reversing cavity 306, rises, and is discharged through the condensate outlet 302 after passing through the other set of condenser pipes 305. The U-shaped double condenser pipes 305 path prolongs the residence time of the refrigerant, and the reversing cavity 306 promotes sufficient heat exchange and maximizes condensation efficiency.

[0037] Preferably, the gaseous alcohol inlet 303 and the liquid alcohol outlet 304 are located on the left and right sides of the side wall of the condenser 30, and a partition plate 307 is provided in the middle of the condenser 30 to isolate the internal space of the condenser 30 into two condensing chambers, so that after the gaseous alcohol inlet 303 enters the condensing chamber on one side, it first flows upward and then flows downward through the condensing chamber on the other side and is condensed into liquid. The partition plate 307 guides the gas to flow back and forth, extending the path of the gaseous alcohol in the condenser 30 and ensuring that it is fully condensed into liquid.

[0038] Preferably, the condenser 30 is provided with several baffles at intervals in the height direction. The baffles are semi-circular and are alternately arranged on the front and back sides of the inner wall of the condenser 30. The alternating baffle design creates a turbulent flow effect, increases the gas-liquid contact area and time, and further improves the condensation effect.

[0039] Preferably, the system also includes a storage tank 40, which is connected to a liquid alcohol outlet 304 via a pipe and is equipped with a fourth electrically controlled valve 04 that is electrically connected to the controller. The storage tank 40 and the fourth electrically controlled valve 04 work together to achieve automatic collection and sealed storage of condensed alcohol, thus avoiding secondary evaporation loss.

[0040] The title provided above provides a detailed description of the present utility model. Specific examples have been used to illustrate the principles and implementation methods of the present utility model. The description of the above embodiments is only for the purpose of helping to understand the present utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present utility model without departing from the principles of the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. An automatic control device for alcohol recovery, characterized in that, include: Storage tanks are used to store mixed solutions to be recycled; The heat exchange tank has a heat medium inlet, a heat medium outlet, a mixed liquid inlet, a gaseous alcohol outlet, and a drain outlet. It is connected to the storage tank through a pipeline, and an electric pump and a first electric control valve are installed at the pipeline. The tank has a heat exchange chamber and two heat medium chambers. The heat medium chambers are distributed at both ends of the heat exchange chamber. Several heat exchange straight pipes are installed in the heat exchange chamber. The two ends of the heat exchange straight pipes are connected to the two heat exchange chambers respectively. The heat medium is injected into the two heat exchange chambers through the heat medium inlet and discharged through the heat medium outlet after passing through the straight pipe. The heat medium inlet is equipped with a second electric control valve. Temperature sensors are installed in both heat medium chambers. The controller, electric pump, first electric valve, second electric valve, and two temperature sensors are all electrically connected to the controller.

2. The automatic control device for alcohol recovery according to claim 1, characterized in that, The heat exchange tank has a hollow cylindrical structure in the middle and spherical structures at both ends. The heat medium outlet and heat medium inlet are respectively located at the spherical structures at both ends. Its internal space is separated into three chambers by two partitions: a heat exchange chamber and two heat medium chambers. Several heat exchange straight pipes are spaced apart on the two partitions. The heat exchange straight pipes pass through the partitions and are connected to the heat medium chambers on both sides.

3. The automatic control device for alcohol recovery according to claim 2, characterized in that, The gaseous alcohol outlet and the mixed liquid inlet are respectively located on the left and right side walls of the top of the heat exchange tank, and the liquid outlet is located on the left side wall of the bottom of the heat exchange tank. The liquid outlet is connected to a storage tank through a pipe, and a third electrically controlled valve connected to the controller is installed at the pipe.

4. An automatic control device for alcohol recovery according to any one of claims 1-3, characterized in that, It also includes a condenser, which has a gaseous alcohol inlet, a liquid alcohol outlet, a condensate inlet and a condensate outlet, and has an internally isolated condensate channel and an alcohol condensation channel. The condensate inlet is equipped with a flow control valve connected to the controller.

5. The automatic control device for alcohol recovery according to claim 4, characterized in that, The condensate inlet and condensate outlet are located at the top of the condensate tank, and a reversing chamber is located at the bottom of the condensate tank. Inside the condensate tank, there are two sets of condenser pipes that are respectively connected to the condensate inlet and the condensate outlet. Both sets of condenser pipes are connected to the reversing chamber, so that the condensate enters from the condensate inlet, goes down through one set of condenser pipes to the reversing chamber, rises, and then goes through the other set of condenser pipes before being discharged through the condensate outlet.

6. The automatic control device for alcohol recovery according to claim 5, characterized in that, The gaseous alcohol inlet and liquid alcohol outlet are located on the left and right sides of the side wall of the condenser, and a partition plate is provided in the middle of the condenser to isolate the internal space of the condenser into two condensing chambers, so that the gaseous alcohol enters the condensing chamber on one side, flows upward first, then passes through the condensing chamber on the other side, and flows downward to be condensed into liquid.

7. The automatic control device for alcohol recovery according to claim 6, characterized in that, The condenser has several baffles spaced at intervals along its height. The baffles are semi-circular and are alternately arranged on the front and back sides of the inner wall of the condenser.

8. The automatic control device for alcohol recovery according to claim 4, characterized in that, It also includes a storage tank connected via a pipe to a liquid alcohol outlet, and the pipe is equipped with a fourth electrically controlled valve that is electrically connected to the controller.

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