Methanol solution precise evaporation device with concentration online monitoring

Abstract

The utility model discloses a kind of methanol solution precision evaporation devices with concentration on-line monitoring, belong to methanol solution evaporation separation technical field, its technical scheme main points include workbench, the right side of the workbench top is hinged with evaporating barrel, rotating shaft is rotationally arranged in the inside of the evaporating barrel, the surface of the rotating shaft is equipped with the thread blade that is oppositely arranged, the both sides of the rotating shaft are hinged with a plurality of horizontal stirring rods, a plurality of horizontal stirring rods are respectively close to the side of corresponding thread blade and be hinged with it, the inside of the evaporating barrel is provided with precision evaporation monitoring control assembly, the left side of the evaporating barrel is provided with concentrated heat energy recovery mechanism, solve the evaporation device in existing evaporation because solution is not mixed uniformly, leading to relatively lower evaporation efficiency, and there can be incomplete cooling when evaporating, leading to the phenomenon that methanol steam is lost and wasted, there is also the problem of energy waste when evaporating.

Description

Technical Field

[0001] This utility model relates to the field of methanol solution evaporation and separation technology, and in particular to a precise methanol solution evaporation device with online concentration monitoring. Background Technology

[0002] In chemical synthesis reactions, methanol is often used as a solvent. After the reaction is complete, the methanol solution is evaporated, taking advantage of methanol's relatively low boiling point to turn it into a gaseous state and separate it from the solute, thereby obtaining a pure target product. For example, in the synthesis of some drugs, the mixture after the reaction contains methanol and drug intermediates. Evaporating methanol can achieve the preliminary purification of drug intermediates.

[0003] Existing evaporation devices suffer from relatively low evaporation efficiency due to uneven solution mixing, incomplete cooling during evaporation leading to methanol vapor loss and waste, and energy waste during evaporation.

[0004] To address this, a precise evaporation device for methanol solution with online concentration monitoring is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a methanol solution precision evaporation device with online concentration monitoring, which can solve the problems of relatively low evaporation efficiency due to uneven solution mixing, incomplete cooling during evaporation leading to methanol vapor loss and waste, and energy waste during evaporation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a methanol solution precision evaporation device with online concentration monitoring, comprising a workbench, an evaporation tank bolted to the right side of the top of the workbench, a rotating shaft rotatably mounted inside the evaporation tank, two threaded blades arranged opposite each other along the axial direction of the rotating shaft being sleeved on the surface of the rotating shaft, a plurality of transverse stirring rods bolted to both sides of the rotating shaft, the plurality of transverse stirring rods being close to and bolted to the side of the corresponding threaded blades, a precision evaporation control component being provided inside the evaporation tank, and a centralized heat recovery mechanism being provided on the left side of the top of the workbench; The precision evaporation control component includes several heating rods arranged in a ring inside the evaporation tank. A steam evaporation pipe is fixedly connected to the left side of the top of the evaporation tank, and a first electrically controlled ball valve is installed inside the steam evaporation pipe.

[0007] Preferably, the centralized heat energy recovery mechanism includes a temporary storage tank for methanol mixed solution. Two support legs are bolted to the front and rear sides of the temporary storage tank for methanol mixed solution, respectively. The bottom of the support legs is bolted to the top of the workbench. An inlet pipe is fixedly connected to the left side of the temporary storage tank for methanol mixed solution. A liquid addition pipe is fixedly connected between the right side of the temporary storage tank for methanol mixed solution and the top of the left side of the evaporation tank. A second electrically controlled ball valve is installed inside the liquid addition pipe.

[0008] Preferably, a threaded cooling pipe is provided on the right side inside the temporary storage tank of the methanol mixture, and a discharge pipe is fixedly connected to the rear end of the threaded cooling pipe, the rear end of which extends to the rear outside of the temporary storage tank of the methanol mixture.

[0009] Preferably, a first threaded cooling flat tube is provided on the left side inside the temporary storage tank of the methanol mixture, and the bottom of the first threaded cooling flat tube extends to the bottom of the temporary storage tank of the methanol mixture.

[0010] Preferably, a controller is bolted to the right side of the top of the evaporator, and a methanol concentration meter and a temperature sensor are bolted to the inner wall of the evaporator.

[0011] Preferably, a waste discharge pipe is fixedly connected to the left side of the evaporation tank, and a third electrically controlled ball valve is installed inside the waste discharge pipe. The left end of the waste discharge pipe extends into the interior of the temporary storage tank for the methanol mixture and is connected to the front end of the threaded cooling round pipe.

[0012] Preferably, the top of the vapor evaporation pipe is fixedly connected to a gas guide pipe, and the other end of the gas guide pipe extends to a temporary storage tank for methanol mixture and is connected to a first threaded cooling flat pipe.

[0013] Preferably, the temporary storage tank for the methanol mixture is equipped with connecting posts at the four corners of its bottom, and a condenser is connected between the bottoms of the four connecting posts. The condenser is equipped with a second threaded cooling flat tube inside, and the first threaded cooling flat tube and the second threaded cooling flat tube are fixedly connected. The bottoms of the first threaded cooling flat tube and the second threaded cooling flat tube are equipped with water collection tanks, and the two water collection tanks are fixedly connected. The top of the evaporation tank is equipped with a stirring motor, and the output shaft of the stirring motor extends into the stirring tank and is bolted to the rotating shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This application sets up a precise evaporation control component. Under the premise of uniform mixing and solution convection stirring achieved by the cooperation of double-threaded blades and transverse stirring rod, and with the addition of methanol concentration meter and temperature sensor to monitor the solution concentration in real time, the controller precisely controls the heat temperature of the heating rod and the opening and closing of the first electrically controlled ball valve inside the steam evaporation tube, so as to achieve precise evaporation control by adjusting the heating power. 2. By setting up a centralized heat energy recovery mechanism, this application can achieve initial cooling of methanol vapor through the first threaded cooling flat tube (using solution preheating to achieve heat energy recovery), and then deep cooling through the second threaded cooling flat tube in the condenser, thereby improving the vapor recovery rate and preventing methanol loss; the threaded cooling round tube uses the waste heat after evaporation to preheat the solution to be treated, thereby reducing heating energy consumption. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the methanol solution precision evaporation device with online concentration monitoring according to this utility model; Figure 2 This is a schematic diagram showing the connection between the threaded blades and the mixing tank of this utility model; Figure 3 This is a schematic diagram showing the connection between the precision evaporation control unit and the evaporation tank of this utility model; Figure 4 This is a schematic diagram showing the connection between the waste discharge pipe and the third electrically controlled ball valve of this utility model; Figure 5 This is a schematic diagram showing the connection between the centralized heat energy recovery mechanism and the evaporation tank of this utility model.

[0016] In the diagram: 1. Workbench; 2. Evaporation tank; 3. Rotating shaft; 4. Threaded blades; 5. Horizontal stirring rod; 6. Precision evaporation control assembly; 61. Heating rod; 62. Steam evaporation pipe; 63. First electrically controlled ball valve; 7. Centralized heat recovery mechanism; 71. Temporary storage tank for methanol mixed solution; 72. Support leg; 73. Liquid inlet pipe; 74. Liquid addition pipe; 75. Second electrically controlled ball valve; 76. Threaded cooling round pipe; 77. Discharge pipe; 78. First threaded cooling flat pipe; 8. Controller; 9. Methanol concentration meter; 10. Temperature sensor; 11. Waste discharge pipe; 12. Third electrically controlled ball valve; 13. Gas guide pipe; 14. Connecting column; 15. Condenser; 16. Second threaded cooling flat pipe; 17. Water collection tank; 18. Stirring motor. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-5 The present invention provides the following technical solution: A methanol solution precision evaporation device with online concentration monitoring includes a workbench 1, an evaporation tank 2 bolted to the right side of the top of the workbench 1, a rotating shaft 3 rotatably mounted inside the evaporation tank 2, two threaded blades 4 arranged opposite each other along the axial direction of the rotating shaft 3 on the surface of the rotating shaft 3, several transverse stirring rods 5 bolted to both sides of the rotating shaft 3, the several transverse stirring rods 5 respectively close to one side of the corresponding threaded blades 4 and bolted to them, a precision evaporation control component 6 is installed inside the evaporation tank 2, and a centralized heat energy recovery mechanism 7 is installed on the left side of the top of the workbench 1; The precision evaporation control component 6 includes several heating rods 61 arranged in a ring inside the evaporation tank 2. A steam evaporation pipe 62 is fixedly connected to the left side of the top of the evaporation tank 2, and a first electrically controlled ball valve 63 is installed inside the steam evaporation pipe 62.

[0019] In this embodiment: The rotating shaft 3 inside the evaporation tank 2 starts to rotate, driving two threaded blades 4, which are sleeved on its surface and arranged opposite each other along the axial direction, to rotate synchronously. At the same time, several transverse stirring rods 5 bolted to both sides of the rotating shaft 3 also rotate. The double threaded blades 4 and the transverse stirring rods 5 work together to convect and stir the methanol solution in the evaporation tank 2, so that the solution is uniformly mixed. At this time, the precision evaporation control component 6 starts to play its role. Several heating rods 61 arranged in a ring inside the evaporation tank 2 start to heat, providing heat for the evaporation of the solution. The steam generated by evaporation is discharged through the steam evaporation pipe 62 fixedly connected to the top left of the evaporation tank 2. The operator can adjust the amount of steam discharged by controlling the opening and closing of the first electrically controlled ball valve 63 inside the steam evaporation pipe 62 and controlling the power of the heating rods 61 according to actual needs. Thus, on the basis of uniform mixing of the solution, with the help of subsequent monitoring equipment, more precise evaporation control can be achieved.

[0020] Specifically, such as Figure 5 , Figure 4As shown, the centralized heat energy recovery mechanism 7 includes a methanol mixed solution temporary storage tank 71. Two support legs 72 are bolted to the front and rear sides of the methanol mixed solution temporary storage tank 71, respectively. The bottom of the support legs 72 is bolted to the top of the workbench 1. An inlet pipe 73 is fixedly connected to the left side of the methanol mixed solution temporary storage tank 71. A liquid addition pipe 74 is fixedly connected between the right side of the methanol mixed solution temporary storage tank 71 and the top of the left side of the evaporation tank 2. A second electrically controlled ball valve 75 is installed inside the liquid addition pipe 74.

[0021] Specifically, such as Figure 5 As shown, a threaded cooling pipe 76 is provided on the right side inside the temporary storage tank 71 for methanol mixture. The rear end of the threaded cooling pipe 76 is fixedly connected to a discharge pipe 77, and the rear end of the discharge pipe 77 extends to the rear outside of the temporary storage tank 71 for methanol mixture.

[0022] Specifically, such as Figure 5 As shown, a first threaded cooling flat tube 78 is provided on the left side inside the temporary storage tank 71 for methanol mixture, and the bottom of the first threaded cooling flat tube 78 extends to the bottom of the temporary storage tank 71 for methanol mixture.

[0023] In this embodiment, the temporary storage tank 71 for methanol mixed solution is fixed to the workbench 1 by two support legs 72 bolted to the front and rear sides respectively. The methanol mixed solution enters the tank from the inlet pipe 73 on the left side of the temporary storage tank 71. After entering the tank, the solution comes into contact with the threaded cooling tube 76 on the right side of the tank, realizing heat exchange treatment of the liquid in the threaded cooling tube 76. At the same time, the first threaded cooling flat tube 78 arranged on the left side inside the temporary storage tank 71 extends to the bottom of the temporary storage tank 71, which can initially cool the gas in the first threaded cooling flat tube 78 and realize the recovery and utilization of heat energy during the cooling process.

[0024] Specifically, such as Figure 3 As shown, a controller 8 is bolted to the right side of the top of the evaporator 2, and a methanol concentration meter 9 and a temperature sensor 10 are bolted to the inner wall of the evaporator 2.

[0025] In this embodiment, the controller 8, which is bolted to the top right side of the evaporation tank 2, is the core of the precise control of the entire device. The methanol concentration meter 9 and the temperature sensor 10, which are bolted to the inner wall of the evaporation tank 2, monitor the methanol solution in the evaporation tank 2 in real time. The controller 8 precisely controls the temperature of the heating rod 61 according to the methanol concentration value, and at the same time precisely controls the opening and closing of the first electrically controlled ball valve 63 inside the steam evaporation pipe 62, thereby adjusting the heating power and realizing precise control of the methanol solution evaporation process, ensuring that the evaporation process is efficient and stable.

[0026] Specifically, such as Figure 4 , Figure 5 As shown, a waste discharge pipe 11 is fixedly connected to the left side of the evaporation tank 2. A third electrically controlled ball valve 12 is installed inside the waste discharge pipe 11. The left end of the waste discharge pipe 11 extends into the interior of the methanol mixed solution temporary storage tank 71 and is connected to the front end of the threaded cooling round pipe 76.

[0027] Specifically, such as Figure 4 , Figure 5 As shown, the top of the vapor evaporation pipe 62 is fixedly connected to the gas guide pipe 13, and the other end of the gas guide pipe 13 extends to the methanol mixed solution temporary storage tank 71 and is connected to the first threaded cooling flat pipe 78.

[0028] In this embodiment: when the methanol solution in the evaporation tank 2 evaporates to a set concentration, the waste discharge pipe 11 fixedly connected to the left side of the evaporation tank 2 starts to work, and the third electrically controlled ball valve 12 inside the waste discharge pipe 11 opens, transporting waste heat and remaining solution through the waste discharge pipe 11 to the threaded cooling round pipe 76 in the methanol mixed solution temporary storage tank 71. The waste heat is used to preheat the solution to be treated in the methanol mixed solution temporary storage tank 71. When it is necessary to replenish the solution to the evaporation tank 2, the second electrically controlled ball valve 75 in the liquid addition pipe 74 fixedly connected between the right side of the methanol mixed solution temporary storage tank 71 and the top left side of the evaporation tank 2 opens, allowing the solution to enter the evaporation tank 2. The methanol vapor generated by evaporation in the evaporation tank 2 is discharged through the vapor evaporation pipe 62. The gas guide pipe 13 fixedly connected to the top of the vapor evaporation pipe 62 transports the vapor to the first threaded cooling flat pipe 78 in the methanol mixed solution temporary storage tank 71 for preliminary cooling and heat recovery.

[0029] Specifically, such as Figure 4 , Figure 5 , Figure 3 As shown, the four corners of the bottom of the temporary storage tank 71 for methanol mixed solution are respectively bolted with connecting posts 14. A condenser 15 is bolted between the bottoms of the four connecting posts 14. A second threaded cooling flat tube 16 is provided inside the condenser 15. The first threaded cooling flat tube 78 is fixedly connected to the second threaded cooling flat tube 16. A water collection tank 17 is provided at the bottom of both the first threaded cooling flat tube 78 and the second threaded cooling flat tube 16, and the two water collection tanks 17 are fixedly connected. A stirring motor 18 is bolted to the top of the evaporation tank 2. The output shaft of the stirring motor 18 extends into the stirring tank and is bolted to the rotating shaft 3.

[0030] In this embodiment: Connecting posts 14 bolted to the four corners of the bottom of the temporary storage tank 71 for methanol mixed solution fix the condenser 15 below it. After the methanol vapor is initially cooled by the first threaded cooling flat tube 78, it enters the condenser 15 through the second threaded cooling flat tube 16, which is fixedly connected to the first threaded cooling flat tube 78. The second threaded cooling flat tube 16 inside the condenser 15 performs deep cooling on the methanol vapor. Both the first threaded cooling flat tube 78 and the second threaded cooling flat tube 16 are provided with water collection tanks 17 at their bottoms, and the two water collection tanks 17 are fixedly connected. After initial cooling and deep cooling, the methanol vapor condenses into liquid and is collected through the water collection tanks 17, which improves the vapor recovery rate, avoids the loss and waste of methanol vapor, and realizes the effective recovery and utilization of energy, reducing the operating cost of the device. The stirring motor 18 bolted to the top of the evaporation tank 2 provides power support for uniform stirring.

[0031] Working principle: The operator first adds the methanol mixture to the evaporation tank 2. The rotation of the motor drives the rotating shaft 3 inside the evaporation tank 2 to rotate, which in turn drives the two threaded blades 4, which are axially opposite to each other on its surface, and several transverse stirring rods 5 on both sides of the rotating shaft 3 to rotate synchronously, thus convectively stirring the solution to make it uniformly mixed. At this time, the precision evaporation control component 6 is activated, and several heating rods 61 arranged in a ring inside the evaporation tank 2 begin to heat, providing heat for the evaporation of the solution. The steam generated by evaporation is discharged through the steam evaporation pipe 62 on the top left of the evaporation tank 2. The operator can adjust the steam discharge by controlling the opening and closing of the first solenoid ball valve 63 inside the steam evaporation pipe 62 and the power of the heating rods 61. The methanol concentration meter 9 and temperature sensor 10 on the inner wall of the evaporation tank 2 monitor the concentration and temperature of the solution in real time. The controller 8 on the top right of the evaporation tank 2 precisely controls the temperature of the heating rods 61 and the opening and closing of the first solenoid ball valve 63 based on the concentration value, and adjusts the heating power to achieve precise evaporation control. When the solution in the evaporation tank 2 evaporates to the set concentration, the waste pipe discharges... The third electrically controlled ball valve 12 inside 11 opens, transporting waste heat and remaining solution to the threaded cooling round pipe 76 inside the methanol mixed solution temporary storage tank 71, using waste heat to preheat the solution to be treated in the tank; when solution needs to be replenished, the second electrically controlled ball valve 75 inside the liquid addition pipe 74 opens, allowing the solution to enter the evaporation tank 2. The methanol vapor generated by the evaporation tank 2 is transported through the steam evaporation pipe 62 and the gas guide pipe 13 to the first threaded cooling flat pipe 78 inside the methanol mixed solution temporary storage tank 71 for preliminary cooling and heat recovery. The methanol mixed solution enters from the liquid inlet pipe 73 on the left side of the temporary storage tank and contacts the threaded cooling round pipe 76 for heat exchange. The bottom of the temporary storage tank is fixed with a condenser 15 through the connecting column 14. The methanol vapor after preliminary cooling enters the condenser 15 through the second threaded cooling flat pipe 16 for deep cooling. The water collection tank 17 at the bottom of the first threaded cooling flat pipe 78 and the second threaded cooling flat pipe 16 are connected to collect the condensed liquid, improve the steam recovery rate, realize the effective recovery and utilization of energy and reduce operating costs.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precise evaporation device for methanol solution with online concentration monitoring, comprising a workbench (1), characterized in that: An evaporation tank (2) is bolted to the right side of the top of the workbench (1). A rotating shaft (3) is rotatably installed inside the evaporation tank (2). Two threaded blades (4) are fitted on the surface of the rotating shaft (3) and arranged opposite each other along the axial direction of the rotating shaft (3). Several horizontal stirring rods (5) are bolted to both sides of the rotating shaft (3). The several horizontal stirring rods (5) are respectively close to one side of the corresponding threaded blades (4) and bolted to them. A precision evaporation control component (6) is installed inside the evaporation tank (2). A centralized heat recovery mechanism (7) is installed on the left side of the top of the workbench (1). The precision evaporation control component (6) includes several heating rods (61), which are arranged in a ring inside the evaporation tank (2). A steam evaporation pipe (62) is fixedly connected to the left side of the top of the evaporation tank (2), and a first electrically controlled ball valve (63) is installed inside the steam evaporation pipe (62).

2. The precise evaporation device for methanol solution with online concentration monitoring according to claim 1, characterized in that: The centralized heat recovery mechanism (7) includes a temporary storage tank (71) for methanol mixed solution. Two support legs (72) are bolted to the front and rear sides of the temporary storage tank (71). The bottom of the support legs (72) is bolted to the top of the workbench (1). An inlet pipe (73) is fixedly connected to the left side of the temporary storage tank (71). A liquid addition pipe (74) is fixedly connected between the right side of the temporary storage tank (71) and the top of the left side of the evaporation tank (2). A second electrically controlled ball valve (75) is installed inside the liquid addition pipe (74).

3. The precise evaporation device for methanol solution with online concentration monitoring according to claim 2, characterized in that: A threaded cooling pipe (76) is provided on the right side inside the temporary storage tank (71) for the methanol mixture solution. The rear end of the threaded cooling pipe (76) is fixedly connected to a discharge pipe (77), and the rear end of the discharge pipe (77) extends to the rear outside of the temporary storage tank (71) for the methanol mixture solution.

4. The precise evaporation device for methanol solution with online concentration monitoring according to claim 2, characterized in that: A first threaded cooling flat tube (78) is provided on the left side inside the temporary storage tank (71) for the methanol mixture solution, and the bottom of the first threaded cooling flat tube (78) extends to the bottom of the temporary storage tank (71) for the methanol mixture solution.

5. The precise evaporation device for methanol solution with online concentration monitoring according to claim 1, characterized in that: A controller (8) is bolted to the right side of the top of the evaporator (2), and a methanol concentration meter (9) and a temperature sensor (10) are bolted to the inner wall of the evaporator (2).

6. The precise evaporation device for methanol solution with online concentration monitoring according to claim 3, characterized in that: The left side of the evaporator (2) is fixedly connected to a waste discharge pipe (11), and a third electrically controlled ball valve (12) is installed inside the waste discharge pipe (11). The left end of the waste discharge pipe (11) extends into the interior of the methanol mixed solution temporary storage tank (71) and is connected to the front end of the threaded cooling round pipe (76).

7. The precise evaporation device for methanol solution with online concentration monitoring according to claim 4, characterized in that: The top of the vapor evaporation pipe (62) is fixedly connected to a gas guide pipe (13), and the other end of the gas guide pipe (13) extends to a temporary storage tank (71) for methanol mixture and is connected to a first threaded cooling flat pipe (78).

8. The precise evaporation device for methanol solution with online concentration monitoring according to claim 4, characterized in that: The four corners of the bottom of the temporary storage tank (71) for the methanol mixture solution are respectively bolted with connecting columns (14), and the bottom of the four connecting columns (14) are bolted with a condenser (15). The condenser (15) is provided with a second threaded cooling flat tube (16). The first threaded cooling flat tube (78) and the second threaded cooling flat tube (16) are fixedly connected. The bottom of the first threaded cooling flat tube (78) and the second threaded cooling flat tube (16) are both provided with a water collection tank (17), and the two water collection tanks (17) are fixedly connected. The top of the evaporation tank (2) is bolted with a stirring motor (18), and the output shaft of the stirring motor (18) extends into the stirring tank and is bolted with a rotating shaft (3).

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