Low-concentration alcohol recovery device

Abstract

The utility model relates to a low-concentration alcohol recovery device which is characterized in that the upper end of a reaction kettle is fixedly communicated with the inlet end of a steam guide pipe, the outlet end of the steam guide pipe is fixedly communicated with the inlet end of a condenser, and the outlet end of the condenser is fixedly communicated with the inlet end of an alcohol storage tank. The outlet end of the alcohol storage tank is fixedly communicated with the inlet end of a discharging pipe, the outlet end of the discharging pipe is fixedly communicated with the inlet end of an alcohol pump, the upper end of the alcohol storage tank is fixedly communicated with one end of a vacuum guide pipe, and the other end of the vacuum guide pipe is fixedly communicated with a vacuum pump. The upper end of the alcohol storage tank is fixedly communicated with the inlet end of a front return pipe, the outlet end of the front return pipe is fixedly communicated with the inlet end of a delivery pump, the outlet end of the delivery pump is fixedly communicated with the inlet end of a rear return pipe, the inner side wall of the reaction kettle is fixedly connected with a water storage tank, and the outlet end of the rear return pipe penetrates to the bottom of the water storage tank.

Description

Technical Field

[0001] The utility model relates to the technical field of recovery devices, in particular to a low-concentration alcohol recovery device. Background Art

[0002] In the production of amino acids, alcohol is a commonly used extraction solvent. Practice has shown that using 60%-70% alcohol as a solvent can fully dissolve other impurities and maximize the retention of the amino acid matrix. However, if the alcohol content is too high, impurities cannot be dissolved, while if the alcohol content is too low, a large amount of amino acids will be lost, which in turn affects amino acid production.

[0003] With the development of industry, competition in the production and sales of amino acids is becoming increasingly fierce. Therefore, it is necessary to effectively reduce the production cost of amino acids. Among them, alcohol recovery is a relatively economical way to reduce costs. However, when recovering alcohol, if the existing alcohol distillation tower is used, it cannot meet the concentration requirements for producing amino acids (the alcohol concentration recovered by the alcohol distillation tower is above 95%). After the alcohol is recovered by the alcohol distillation tower, water needs to be added for dilution, which is not only cumbersome, but also the amino acids in the recovered liquid are inactivated by high temperature and cannot be recycled again. Therefore, this application specially proposes a low-concentration alcohol recovery device to solve the above problems. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a low-concentration alcohol recovery device, which solves the problem. The technical solution is as follows: the reactor is provided with a heating device and a stirring device, and is characterized in that the upper end of the reactor is fixedly connected to the inlet end of the steam conduit, the outlet end of the steam conduit is fixedly connected to the inlet end of the condenser, the outlet end of the condenser is fixedly connected to the inlet end of the alcohol storage tank, the outlet end of the alcohol storage tank is fixedly connected to the inlet end of the discharge pipe, the outlet end of the discharge pipe is fixedly connected to the inlet end of the alcohol pump, and the alcohol pump is fixedly connected to the inlet end of the alcohol pump. The outlet end is fixedly connected to the inlet end of the alcohol conduit, the upper end of the alcohol storage tank is fixedly connected to one end of the vacuum conduit, the other end of the vacuum conduit is fixedly connected to the vacuum pump, the upper end of the alcohol storage tank is fixedly connected to the inlet end of the front reflux pipe, the outlet end of the front reflux pipe is fixedly connected to the inlet end of the delivery pump, a discharge valve is installed on the discharge pipe, the outlet end of the delivery pump is fixedly connected to the inlet end of the rear reflux pipe, the inner side wall of the reactor is fixedly connected to a water storage tank, the outlet end of the rear reflux pipe passes through the bottom of the water storage tank, and the upper end of the reactor is fixedly connected to a water supply pipe corresponding to the water storage tank.

[0005] Preferably, the heating device comprises a jacket coaxially arranged integrally with the reactor, wherein a spirally arranged heating coil is fixedly installed in the jacket.

[0006] Preferably, the stirring device includes a stirring shaft coaxially connected to the reactor, the stirring shaft is fixedly connected to a plurality of groups of stirring rods evenly distributed vertically, and the upper end of the reactor is fixedly connected to a motor for driving the stirring shaft.

[0007] Preferably, the upper end of the reactor is fixedly connected to a feed pipe, the lower end of the reactor is coaxially fixedly connected to an external discharge pipe, an external discharge valve is installed on the external discharge pipe, a water supply valve is installed on the water supply pipe, and the lower end of the reactor is fixedly connected to a plurality of legs in a ring array.

[0008] The beneficial effects of the utility model are:

[0009] 1. When the present application is in use, a recovery liquid (containing alcohol and amino acids) is stored in the reactor. Hot water is passed through a heating coil to heat the reactor to 70 degrees, thereby recovering the alcohol at a low temperature. The vacuum pump is evacuated to -0.09 MPa to evaporate the alcohol in the recovery liquid. The evaporated alcohol enters the condenser through a steam conduit and is condensed into liquid. The liquid is then stored in an alcohol storage tank to complete alcohol recovery. The recovered alcohol can also be transported from the alcohol storage tank to an amino acid production system for utilization under the action of the alcohol pump, and the remaining recovery liquid in the reactor can also be returned to the production system to continue extracting amino acids therein, thereby improving recovery efficiency and reducing costs.

[0010] 2. After the alcohol vapor that is not condensed by the condenser enters the alcohol storage tank, it can enter the reactor through the front reflux pipe and the rear reflux pipe under the action of the delivery pump. The water storage tank contains clean water that submerges the outlet of the rear reflux pipe. Under the action of the delivery pump, the uncondensed alcohol vapor passes through the rear reflux pipe and dissolves in the clean water in the water storage tank, which can continue to evaporate and recover. In addition, the clean water in the water storage tank can prevent the evaporated alcohol in the reactor from directly flowing back into the alcohol storage tank through the rear reflux pipe without passing through the condenser. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a first-perspective stereoscopic view of the present invention.

[0012] Figure 2 This is a partial three-dimensional cross-sectional view of the utility model from a second viewing angle.

[0013] Figure 3 It is an enlarged view of area A in the partial three-dimensional cross-sectional view from the second viewing angle of the present invention.

[0014] Reference numerals

[0015] 1. Reactor, 2. Steam pipe, 3. Condenser, 4. Alcohol storage tank, 5. Drain pipe, 6. Alcohol pump, 7. Alcohol pipe, 8. Vacuum pipe, 9. Vacuum pump, 10. Front reflux pipe, 11. Transfer pump, 12. Rear reflux pipe, 13. Water storage tank, 14. Water supply pipe, 15. Jacket, 16. Heating coil, 17. Stirring shaft, 18. Stirring rod, 19. Motor, 20. Feed pipe, 21. External discharge pipe, 22. External discharge valve, 23. Water supply valve, 24. Support leg, 25. Inlet end of heating coil, 26. Outlet end of heating coil, 27. Refrigerant inlet, 28. Refrigerant outlet, 29. Drain valve. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1-3 The specific implementation methods of the present invention are further described in detail.

[0017] In the first embodiment, the technical solution is as follows: when the present application is in use, the reactor 1 stores a recovery liquid (containing alcohol and amino acids), hot water is passed through the heating coil 16 to heat the reactor 1 to 70 degrees, and the alcohol can be recovered at low temperature. The vacuum pump 9 evacuates the air to -0.09 MPa to evaporate the alcohol in the recovery liquid. The evaporated alcohol enters the condenser 3 through the steam conduit 2 and is condensed into liquid. The evaporated alcohol then enters the alcohol storage tank 4 for storage to complete the alcohol recovery, and its concentration is suitable for amino acid production. The recovered alcohol can also be transported from the alcohol storage tank 4 to the amino acid production system for utilization under the action of the alcohol pump 6, and the remaining recovery liquid in the reactor 1 can also be returned to the production system to continue extracting amino acids therein, thereby improving recovery efficiency and reducing costs. After the alcohol vapor that is not condensed by the condenser 3 enters the alcohol storage tank 4, it can enter the reactor 1 through the front reflux pipe 10 and the rear reflux pipe 12 under the action of the delivery pump 11. The water storage tank 13 stores clean water that submerges the outlet end of the rear reflux pipe 12. Under the action of the delivery pump 11, the uncondensed alcohol vapor passes through the rear reflux pipe 12 and dissolves in the clean water in the water storage tank 13, and can continue to evaporate and recover. In addition, the clean water in the water storage tank 13 can also prevent the evaporated alcohol in the reactor 1 from directly flowing back through the rear reflux pipe 12 and entering the alcohol storage tank 4 without passing through the condenser 3.

[0018] Example 2, based on Example 1, specifically, when in use, the present application adopts a reactor 1 with temperature control and pressure monitoring functions in the prior art. The specific structure thereof will not be described in detail in this application, and only the stirring device and the heating device will be described. The legs 24 provided can support the reactor 1. When in use, the recovery liquid containing amino acids and alcohol can be passed into the reactor 1 from the feed pipe 20 to facilitate the recovery of the alcohol in the recovery liquid. Specifically, a heating coil 16 is arranged in the jacket 15 of the reactor 1, and hot water of suitable temperature is continuously input from the inlet end 25 of the heating coil. The outlet end 26 of the heating coil can be connected to an external pipe network. The hot water in the heating coil 16 causes the temperature in the reactor 1 to rise to 70 degrees. At the same time, the vacuum pump 9 is started. Under the action of the vacuum pump 9 and the vacuum conduit 8, the reactor 1 is evacuated to -0.09 MPa to improve the efficiency of the alcohol vapor. Furthermore, the motor 19 of the stirring device is started to drive the stirring shaft 17 and the stirring rod 18 to rotate together, so as to stir the recovery liquid and further improve the efficiency of alcohol evaporation.

[0019] The evaporated alcohol enters condenser 3 through steam conduit 2 and condenses into liquid. Condenser 3 is provided with a refrigerant inlet 27 and a refrigerant outlet 28 to facilitate the delivery of cooling water to the condenser. After condensation in condenser 3, the evaporated alcohol enters alcohol storage tank 4 for storage, completing alcohol recovery. Alcohol pump 6 is activated and discharge valve 29 on discharge pipe 5 is opened. The recovered alcohol can also be transported to the amino acid production system for utilization via alcohol conduit 7 under the action of alcohol pump 6. The remaining recovered liquid in reactor 1 can also be discharged from discharge pipe 21 by opening discharge valve 22 and returned to the production system for continued amino acid extraction, thereby improving recovery efficiency and reducing costs.

[0020] A small amount of alcohol vapor that is not condensed by the condenser 3 will enter the alcohol storage tank 4. In order to improve the recovery rate of alcohol, the delivery pump 11 can be started. Under the action of the delivery pump 11, the uncondensed alcohol vapor will pass through the front reflux pipe 10 and the rear reflux pipe 12 into the water tank 13 in the reactor 1. The water tank 13 stores clean water that submerges the outlet end of the rear reflux pipe 12. The uncondensed alcohol vapor passes through the rear reflux pipe 12 and dissolves in the clean water in the water tank 13, and can continue to evaporate and recover. In addition, the clean water in the water tank 13 can also prevent the evaporated alcohol in the reactor 1 from directly flowing back from the rear reflux pipe 12 into the alcohol storage tank 4 without passing through the condenser 3. For the water tank 13, the water supply valve 23 can be opened regularly and water can be added to the water tank 13 from the water supply pipe 14 to maintain the liquid level.

Claims

1. A low-concentration alcohol recovery device, comprising a reaction kettle (1), wherein the reaction kettle (1) is equipped with a heating device and a stirring device, characterized in that: The upper end of the reactor (1) is fixedly connected to the inlet end of the steam conduit (2), the outlet end of the steam conduit (2) is fixedly connected to the inlet end of the condenser (3), the outlet end of the condenser (3) is fixedly connected to the inlet end of the alcohol storage tank (4), the outlet end of the alcohol storage tank (4) is fixedly connected to the inlet end of the discharge pipe (5), the outlet end of the discharge pipe (5) is fixedly connected to the inlet end of the alcohol pump (6), the discharge pipe (5) is installed with a discharge valve (29), the outlet end of the alcohol pump (6) is fixedly connected to the inlet end of the alcohol conduit (7), and the upper end of the alcohol storage tank (4) is fixedly connected to the vacuum conduit (7). The alcohol storage tank (4) is fixedly connected to one end of the vacuum tube (8), and the other end of the vacuum tube (8) is fixedly connected to a vacuum pump (9). The upper end of the alcohol storage tank (4) is fixedly connected to the inlet end of the front reflux tube (10), the outlet end of the front reflux tube (10) is fixedly connected to the inlet end of the delivery pump (11), and the outlet end of the delivery pump (11) is fixedly connected to the inlet end of the rear reflux tube (12). The inner wall of the reactor (1) is fixedly connected to a water storage tank (13), the outlet end of the rear reflux tube (12) penetrates to the bottom of the water storage tank (13), and the upper end of the reactor (1) is fixedly connected to a water supply pipe (14) corresponding to the water storage tank (13).

2. A low-concentration alcohol recovery device according to claim 1, characterized in that: The heating device comprises a jacket (15) arranged coaxially with the reaction kettle (1), wherein a spirally arranged heating coil (16) is fixedly installed in the jacket (15).

3. A low-concentration alcohol recovery device according to claim 1, characterized in that: The stirring device comprises a stirring shaft (17) coaxially connected to the reaction kettle (1), the stirring shaft (17) being fixedly connected to a plurality of groups of stirring rods (18) evenly distributed vertically, and a motor (19) for driving the stirring shaft (17) being fixedly connected to the upper end of the reaction kettle (1).

4. A low-concentration alcohol recovery device according to claim 1, characterized in that: The upper end of the reactor (1) is fixedly connected to a feed pipe (20), the lower end of the reactor (1) is coaxially fixedly connected to an external discharge pipe (21), an external discharge valve (22) is installed on the external discharge pipe (21), a water supply valve (23) is installed on the water supply pipe (14), and a plurality of supporting legs (24) in a ring array are fixedly connected to the lower end of the reactor (1).

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