Organic solvent recovery device

Abstract

The utility model discloses an organic solvent recovery device, which is characterized in that a heater is connected with a distillation kettle, the distillation kettle is provided with a material input component and a first exhaust port, the first exhaust port is connected with a condenser, a gear motor and a bearing seat component are positioned outside the distillation kettle, and one end of a stirring shaft penetrates through the bearing seat component and is connected with the gear motor; the stirring shaft is connected with the bearing seat assembly, the bearing seat assembly is fixed to the distillation still, the other end of the stirring shaft penetrates through the distillation still, enters the distillation still and then is fixed to the stirring paddle, the first sealing component is matched with the stirring shaft and the bearing seat assembly, a cavity is formed in the bearing seat assembly, and the second sealing assembly is located in the cavity. The first sealing component is located between the bearing seat assembly and the second sealing assembly, and after the second sealing assembly and the bearing seat assembly are fixed, the first sealing component is pressed between the bearing seat assembly and the second sealing assembly. According to the utility model, gas in the distillation kettle can be prevented from leaking between the stirring shaft and the bearing seat assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical product preparation technical field, concretely relates to an organic solvent recovery device. BACKGROUND

[0002] Organic solvent refers to a kind of chemical capable of dissolving organic matter, usually by carbon, hydrogen, oxygen, nitrogen, sulfur etc. Atom is constituted, and at normal temperature, it is liquid or semi-solid state. Since it is liquid at normal temperature and pressure, it has greater volatility. In the production process of chemical products, organic solvent is often used, after use is completed, because the nature of the solute and solvent of organic solvent is not changed, therefore, organic solvent is usually recycled. The method for recycling organic solvent mainly includes the following several kinds:

[0003] Distillation method: utilize the volatile nature of organic solvent, evaporate solvent at high temperature, then condense and recover. This method is suitable for higher volatile organic solvents, such as ethanol, ethyl acetate etc.

[0004] Adsorption method: organic solvent is adsorbed to the surface of adsorbent, then adsorbent is heated to desorb, so that organic solvent is evaporated and condensed and recovered. Common adsorbents are activated carbon, silica gel etc. This method is suitable for lower volatile organic solvents.

[0005] Ion exchange method: organic solvent is adsorbed from waste water by ion exchange resin, then it is washed out by organic solvent. This method is suitable for low concentration of organic solvent, but a large amount of ion exchange resin is needed, and the cost is higher.

[0006] Distillation method is widely used in chemical industry production due to its efficiency and applicability. Distillation method is to send the solution containing organic solvent into distillation kettle, heat distillation kettle, utilize the different boiling points of different substances in solution, first make low boiling point substance separate from solution in the form of steam, steam enters condenser, and is converted into liquid in condenser.

[0007] After the solution enters into the distillation kettle, the solution usually needs to be stirred through the stirrer arranged on the distillation kettle, the stirrer is usually composed of a speed reducer motor, a bearing seat assembly, a stirring shaft, a stirring paddle and a first sealing part, the speed reducer motor and the bearing seat assembly are located outside the distillation kettle, one end of the stirring shaft penetrates through the bearing seat assembly and is connected with the speed reducer motor, the stirring shaft is connected with the bearing seat assembly, the other end of the stirring shaft penetrates through the distillation kettle and enters the inside of the distillation kettle and is fixed with the stirring paddle, the first sealing part is arranged between the stirring shaft and the bearing seat assembly, the stirring shaft and the bearing seat assembly are sealed through the first sealing part, however, with the long use time of the stirring shaft, the first sealing part will inevitably be worn, and only the first sealing part is arranged on the current distillation kettle, once the first sealing part is worn, the sealing will be invalid. Utility model content

[0008] The organic solvent recovery device can avoid gas leakage between the stirring shaft and the bearing seat assembly in the distillation kettle.

[0009] The technical scheme solving the above problems is as follows:

[0010] The organic solvent recovery device comprises a distillation kettle assembly, a heater and a condenser, the distillation kettle assembly comprises a distillation kettle, a speed reducer motor, a bearing seat assembly, a stirring shaft, a stirring paddle and a first sealing part, the heater is connected with the distillation kettle, the distillation kettle is provided with a material input assembly and a first exhaust port, the first exhaust port is connected with the condenser, the speed reducer motor and the bearing seat assembly are located outside the distillation kettle, one end of the stirring shaft penetrates through the bearing seat assembly and is connected with the speed reducer motor, the stirring shaft is connected with the bearing seat assembly, the bearing seat assembly is fixed with the distillation kettle, the other end of the stirring shaft penetrates through the distillation kettle and enters the inside of the distillation kettle and is fixed with the stirring paddle, the first sealing part cooperates with the stirring shaft and the bearing seat assembly, further comprising a second sealing assembly sleeved on the stirring shaft, the bearing seat assembly is provided with a cavity, the second sealing assembly is located in the cavity, the first sealing part is located between the bearing seat assembly and the second sealing assembly, after the second sealing assembly is fixed with the bearing seat assembly, the first sealing part is compressed between the bearing seat assembly and the second sealing assembly.

[0011] The utility model discloses a first sealing part is sealed to the gap between bearing seat assembly and second sealing assembly, and the second sealing assembly is sealed to the gap between stirring shaft and second sealing assembly. The first sealing part has no contact relation with the rotating shaft, and therefore the first sealing part is not abraded. When the stirring shaft rotates, the stirring shaft transmits the torsion to the set screw, the second connecting ring, the adjusting screw and the first connecting ring in turn, so that the connecting seat rotates as a whole with the stirring shaft. Because the moving ring is abutted with the static ring under the tension of the spring, and the spring is installed in the connecting seat, the spring and the moving ring rotate with the connecting seat. When the moving ring is abraded, the moving ring moves axially under the tension of the spring, so that the moving ring and the static ring always abut, and the static ring and the moving ring keep the sealed state. In the connecting seat, the first sealing ring and the stirring shaft are matched to seal the gap between the connecting seat and the stirring shaft, so that the gas leakage is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the schematic diagram of organic solvent recovery device in the utility model.

[0013] Fig. 2 It is the structural view of distillation kettle assembly.

[0014] Fig. 3 It is the sectional view of second sealing assembly.

[0015] Markings in the drawings:

[0016] Distillation kettle assembly A, distillation kettle 1, material input assembly 1a, first exhaust port 1b, second exhaust port 1c, speed reducer 2, bearing seat assembly 3, cavity 3a, stirring shaft 4, stirring paddle 5, first sealing part 6, discharge valve 7, buffer tank 8, air extraction pump 9.

[0017] Heater B, jacket 10, water supply unit 11, first valve assembly 12, steam supply unit 13, second valve assembly 14, third valve assembly 15, containing space 16, first interface 17, second interface 18.

[0018] Condenser C, condensing part 21, fourth valve assembly 22, receiving groove 23, first discharge valve 24, flame arrester 25, first tail gas absorber 26.

[0019] Second sealing assembly D, fixed seat 31, static ring 32, moving ring 33, connecting seat 34, first annular cavity 34a, mounting hole 34b, first connecting ring 341, second connecting ring 342, adjusting screw 343, set screw 344, spring 35, first sealing ring 36, push plate 37, second sealing ring 38, annular protrusion 38a, second annular cavity 39, oil ring 40, grease 41. DETAILED DESCRIPTION

[0020] The utility model will be further explained in detail in combination with the drawings and specific embodiment.

[0021] As Figs. 1 to 3 The organic solvent recovery device of the utility model, including retort subassembly A, heater B, condenser C, second sealing assembly D, the following to each part and its between relationship carry out detailed explanation.

[0022] Retort subassembly A includes retort 1, speed reducer 2, bearing seat assembly 3, stirring shaft 4, stirring paddle 5, first sealing part 6, heater B is connected with retort 1, is equipped with material input subassembly 1a and first exhaust port 1b on retort 1, material input subassembly 1a is composed of pipeline and valve, when the organic solvent needing recovery needs to be input to retort 1, opens valve, and the organic solvent enters retort 1 through pipeline and valve. First exhaust port 1b is connected with condenser C, speed reducer 2 and bearing seat assembly 3 are located outside retort 1, one end of stirring shaft 4 passes through bearing seat assembly 3 and is connected with speed reducer 2, stirring shaft 4 is connected with bearing seat assembly 3, bearing seat assembly 3 is fixed with retort 1, the other end of stirring shaft 4 passes through retort 1 and enters the inside of retort and is fixed with stirring paddle 5, first sealing part 6 cooperates with stirring shaft 4 and bearing seat assembly 3.

[0023] Still be equipped with second exhaust port 1c on retort 1, retort subassembly A still includes discharge valve 7, buffer tank 8, air pump 9, one end of discharge valve 7 is connected with second exhaust port 1c, the other end of discharge valve 7 is connected with the input end of buffer tank 8, the output end of buffer tank 8 is connected with air pump 9. When needing to pump the retort 1, opens discharge valve 7 and air pump 9, and the negative pressure generated by the work of air pump 9 is transmitted to retort 1 through buffer tank 8, thereby pumping retort 1.

[0024] The heater B includes jacket 10, water supply unit 11, first valve assembly 12, steam supply unit 13, second valve assembly 14, third valve assembly 15, jacket 10 is sleeved on retort 1 and is fixed with retort 1 after, and forms containing space 16 between jacket 10 and retort 1, is equipped with first interface 17, second interface 18 on jacket 10, one end of first valve assembly 12 is connected with water supply unit 11, the other end of first valve assembly 12 and third valve assembly 15 are connected with first interface 17 respectively, one end of second valve assembly 14 is connected with steam supply unit 13, the other end of second valve assembly 14 is connected with second interface 18. First valve assembly 12 and second valve assembly 14 are respectively composed of multiple control valves, and these control valves are connected in series.

[0025] The condenser C comprises a condensing component 21, a fourth valve assembly 22, a receiving groove 23, the input end of the condensing component 21 is connected with the first exhaust port 1b, the output end of the condensing component 21 is connected with one end of the fourth valve assembly 22, the other end of the fourth valve assembly 22 is connected with the receiving groove 23. The condenser C further comprises a first exhaust valve 24, a flame arrester 25, a first tail gas absorber 26, one end of the first exhaust valve 24 is connected with the receiving groove 23, the other end of the first exhaust valve 24 is connected with one end of the flame arrester 25, the other end of the flame arrester 25 is connected with the first tail gas absorber 26.

[0026] When it is necessary to recover the organic solvent, first, open the valve in the input assembly 1a, input the solution containing the organic solvent into the distillation kettle 1, and the organic solvent enters the distillation kettle 1 through the pipeline and the valve. Start the speed reducer 2 to work, and the speed reducer 2 drives the stirring shaft 4 to rotate, and the solution containing the organic solvent is stirred by the stirring paddle 5. Open the first valve assembly 12 and the steam supply unit 13 to make water and steam enter the containing space 16, and the distillation kettle 1 is heated by steam. As the water and steam are continuously input, the steam is dissolved in the water to accumulate heat energy. Since the water is in constant contact with the distillation kettle 1, the heat energy in the water is transferred to the distillation kettle 1, so that the distillation kettle 1 is quickly heated. After the temperature in the distillation kettle 1 rises, the temperature of the solution containing the organic solvent also rises. When the temperature reaches the boiling point of the organic solvent, the organic solvent evaporates from the solution to become a gas. These gases enter the condensing component 21 through the first exhaust port 1b, and are converted into a liquid state by the condensing component 21. Open the fourth valve assembly 22 to make the liquid organic solution fall into the receiving groove 23. Open the first exhaust valve 24, and if there is gas in the receiving groove 23, the gas enters the first tail gas absorber 26 through the first exhaust valve 24 and the flame arrester 25.

[0027] The second sealing assembly D is sleeved on the stirring shaft 4, the bearing seat assembly 3 is provided with a cavity 3a, and the second sealing assembly D is located in the cavity 3a. The bearing seat assembly 3 comprises a lower seat 3b and an upper seat 3c, the lower seat 3b is preferentially fixed with the distillation kettle 1 by welding, the upper seat 3c is preferentially fixed with the lower seat 3b by bolts, and the cavity 3a is located between the lower seat 3b and the upper seat 3c. The first sealing component 6 is located between the bearing seat assembly 3 and the second sealing assembly D. After the second sealing assembly D is fixed with the bearing seat assembly 3, the first sealing component 6 is compressed between the bearing seat assembly 3 and the second sealing assembly D.

[0028] The second sealing assembly D comprises a fixed seat 31, a static ring 32, a dynamic ring 33, a connecting seat 34, a spring 35, and a first sealing ring 36. The fixed seat 31 is fixed with the bearing seat assembly 3. The first sealing component 6 is located between the fixed seat 31 and the lower seat 3b. The fixed seat 31 and the lower seat 3b are fastened into an integrated body by screws, so that the first sealing component 6 is compressed between the lower seat 3b and the fixed seat 31. The material of the dynamic ring 33 can be a material with low friction coefficient, such as graphite, polytetrafluoroethylene, etc. The dynamic ring 33 with low friction coefficient can reduce wear and tear and ensure service life. The static ring 32 is fixed with the fixed seat 31. The connecting seat 34 is provided with a first annular cavity 34a and a mounting hole 34b penetrating the first annular cavity 34a. One end of the spring 35 is located in the mounting hole 34b. One end of the dynamic ring 33 is matched with the first annular cavity 34a. The other end of the spring 35 is matched with one end of the dynamic ring 33. The tension of the spring 35 makes the other end of the dynamic ring 33 abut against the static ring 32. The first sealing ring 36 is installed in the inner hole of the connecting seat 34. The connecting seat 34 is annular. The inner hole wall of the connecting seat 34 is provided with an annular groove. The first sealing ring 36 is matched with the annular groove on the inner hole wall of the connecting seat 34. When the stirring shaft 4 passes through the second sealing assembly D, the first sealing ring 36 is tightly sleeved on the stirring shaft 4.

[0029] The connecting seat 34 comprises a first connecting ring 341, a second connecting ring 342, an adjusting screw 343, and a clamping screw 344. The first annular cavity 34a and the mounting hole 34b are arranged on the first connecting ring 341. The first connecting ring 341 is connected with the second connecting ring 342 through the adjusting screw 343. The second connecting ring 342 is provided with a threaded hole on the circumferential surface. After the second sealing assembly D is sleeved on the stirring shaft 4, the clamping screw 344 is threadedly connected with the threaded hole on the second connecting ring 342 and is matched with the stirring shaft 4. In this embodiment, a plurality of clamping screws 344 abut against the stirring shaft 4, so that the connecting seat 34 is fixed into an integrated body with the stirring shaft 4.

[0030] The second sealing assembly D further comprises a push plate 37 and a second sealing ring 38. The push plate 37 is located between the spring 35 and the dynamic ring 33 of the connecting seat 34. The push plate 37 abuts against the spring 35 and the dynamic ring 33, respectively. The push plate 37 is provided with an annular protrusion 38a. The push plate facilitates the transmission of the tension of the spring 35, so that the dynamic ring 33 and the static ring abut against each other. One end of the dynamic ring 33 is provided with a notch 33a. A second annular cavity 39 is formed between the annular protrusion 38a, the dynamic ring 33, and the connecting seat 34. The second sealing ring 38 is located in the second annular cavity 39. The second annular cavity 39 seals the gap between the dynamic ring 33 and the connecting seat 34.

[0031] The second sealing assembly D further comprises an oil ring 40, one end of the oil ring 40 is fixed with the fixed seat 31, the oil ring 40 surrounds the connecting seat 34, and a cavity is formed between the oil ring 40 and the fixed seat 31, the static ring 32, the dynamic ring 33 and the connecting seat 34, and grease 41 for sealing is arranged in the cavity.

[0032] When the stirring shaft 4 rotates, the stirring shaft 4 will transmit the torsion to the set screw 344, the second connecting ring 342, the adjusting screw 343 and the first connecting ring 341 in turn, so that the connecting seat 34 rotates as a whole with the stirring shaft 4, and since the dynamic ring 33 is abutted against the static ring 32 under the tension of the spring 35 which is installed in the connecting seat 34, the spring 35 and the dynamic ring 33 rotate with the connecting seat 34. When the dynamic ring 33 is worn, the dynamic ring 33 moves axially under the tension of the spring 35, so that the dynamic ring 33 is always abutted against the static ring 32, and the static ring 32 and the dynamic ring 33 are kept in a sealed state.

Claims

1. An organic solvent recovery device, comprising a distillation kettle assembly (A), a heater (B), and a condenser (C), the distillation kettle assembly (A) comprising a distillation kettle (1), a speed reducer (2), a bearing seat assembly (3), a stirring shaft (4), a stirring paddle (5), and a first sealing component (6), the heater (B) being connected with the distillation kettle (1), the distillation kettle (1) being provided with a material input assembly (1a) and a first exhaust port (1b), the first exhaust port (1b) being connected with the condenser (C), the speed reducer (2) and the bearing seat assembly (3) being located outside the distillation kettle (1), one end of the stirring shaft (4) being connected with the speed reducer (2) through the bearing seat assembly (3), the stirring shaft (4) being connected with the bearing seat assembly (3), the bearing seat assembly (3) being fixed with the distillation kettle (1), the other end of the stirring shaft (4) being fixed with the stirring paddle (5) after penetrating through the distillation kettle (1) and entering the inside of the distillation kettle, the first sealing component (6) being matched with the stirring shaft (4) and the bearing seat assembly (3), characterized in that, The second sealing assembly (D) is sleeved on the stirring shaft (4), the bearing seat assembly (3) is provided with a cavity (3a), the second sealing assembly (D) is located in the cavity (3a), the first sealing part (6) is located between the bearing seat assembly (3) and the second sealing assembly (D), and after the second sealing assembly (D) is fixed with the bearing seat assembly (3), the first sealing part (6) is compressed between the bearing seat assembly (3) and the second sealing assembly (D).

2. The organic solvent recovery apparatus according to claim 1, characterized by The heater (B) comprises a jacket (10), a water supply unit (11), a first valve assembly (12), a steam supply unit (13), a second valve assembly (14) and a third valve assembly (15). The jacket (10) is sleeved on the distillation kettle (1) and fixed with the distillation kettle (1), so that a containing space (16) is formed between the jacket (10) and the distillation kettle (1). The jacket (10) is provided with a first interface (17) and a second interface (18). One end of the first valve assembly (12) is connected with the water supply unit (11), the other end of the first valve assembly (12) and the third valve assembly (15) are respectively connected with the first interface (17), one end of the second valve assembly (14) is connected with the steam supply unit (13), and the other end of the second valve assembly (14) is connected with the second interface (18).

3. The organic solvent recovery apparatus according to claim 1, wherein The condenser (C) comprises a condensing part (21), a fourth valve assembly (22) and a receiving groove (23). The input end of the condensing part (21) is connected with the first exhaust port (1b), the output end of the condensing part (21) is connected with one end of the fourth valve assembly (22), and the other end of the fourth valve assembly (22) is connected with the receiving groove (23).

4. The organic solvent recovery apparatus according to claim 1, wherein The second sealing assembly (D) comprises a fixed seat (31), a static ring (32), a dynamic ring (33), a connecting seat (34), a spring (35) and a first sealing ring (36). The fixed seat (31) is fixed with the bearing seat assembly (3), and the static ring (32) is fixed with the fixed seat (31). The connecting seat is provided with a first annular cavity (34a) and a mounting hole (34b) penetrating through the first annular cavity (34a). One end of the spring (35) is located in the mounting hole (34b), one end of the dynamic ring (33) is matched with the first annular cavity (34a), the other end of the spring (35) is matched with one end of the dynamic ring (33), the tension of the spring (35) makes the other end of the dynamic ring (33) abut against the static ring (32), and the first sealing ring (36) is installed in the inner hole of the connecting seat (34).

5. The organic solvent recovery apparatus according to claim 4, wherein The second sealing assembly (D) further comprises a push plate (37) and a second sealing ring (38). The push plate (37) is located between the spring (35) and the dynamic ring (33) of the connecting seat (34), and abuts against the spring (35) and the dynamic ring (33) respectively. The push plate (37) is provided with an annular protrusion (38a), one end of the dynamic ring (33) is provided with a notch (33a), a second annular cavity (39) is formed between the annular protrusion (38a), the dynamic ring (33) and the connecting seat (34), and the second sealing ring (38) is located in the second annular cavity (39).

6. The organic solvent recovery apparatus according to claim 4, wherein The second sealing assembly (D) further comprises an oil ring (40), one end of the oil ring (40) is fixed with the fixed seat (31), the oil ring (40) surrounds the connecting seat (34), and a cavity is formed between the oil ring (40) and the fixed seat (31), the static ring (32), the dynamic ring (33) and the connecting seat (34), and grease (41) for sealing is arranged in the cavity.

7. The organic solvent recovery apparatus according to claim 4, wherein The connecting seat (34) comprises a first connecting ring (341), a second connecting ring (342), an adjusting screw (343) and a clamping screw (344), the first connecting ring (341) is connected with the second connecting ring (342) through the adjusting screw (343), a threaded hole is arranged on the peripheral surface of the second connecting ring (342), after the second sealing assembly (D) is sleeved on the stirring shaft (4), the clamping screw (344) is screwed with the threaded hole on the second connecting ring (342) and cooperates with the stirring shaft (4), so that the connecting seat (34) is fixed with the stirring shaft (4) to be integrated.

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