Alkali adding device for rectification

Abstract

The utility model relates to the technical field of alkali adding devices, in particular to an alkali adding device for rectification, which comprises a mixing barrel, an alkali liquor box, a metering pump, a filter box and a motor, a feeding pipe is communicated with the rear side of the upper surface of the mixing barrel, a flow meter is mounted on the outer side wall of the feeding pipe, the feeding pipe is connected with a crude methanol conveying pipeline, and the filter box is connected with the feeding pipe. And the upper surface of the alkali liquor box is fixedly connected with a liquid pumping pipe. When the device works, crude methanol feed liquid enters the mixing barrel along the feeding pipe, alkali liquor enters the mixing barrel along the liquid pumping pipe, the filter box and the alkali adding pipe under the pumping action of the metering pump, impurities in the alkali liquor can be filtered by the filter plate, and the impurities are prevented from entering subsequent pipelines and equipment to cause blockage or damage; the mixing of the crude methanol feed liquid and the alkali liquor is accelerated, the uniform mixing effect is improved, the acid regulation is realized, the stability of the pH value of the crude methanol feed liquid is ensured, the crude methanol feed liquid is prevented from entering a rectifying tower to corrode equipment during subsequent rectification, and convenience is brought to the rectification work of the feed liquid.

Description

Technical Field

[0001] This utility model relates to the technical field of alkali addition devices, specifically an alkali addition device for distillation. Background Technology

[0002] Crude methanol contains various impurities, such as alcohols (ethanol, propanol, etc.), water, aldehydes, ketones, esters, and small amounts of organic acids and higher alcohols. Through distillation, methanol in crude methanol can be effectively separated from other impurities to obtain high-purity refined methanol, which meets the strict requirements of different industries (such as pharmaceuticals, electronics, chemical synthesis, etc.) for methanol purity.

[0003] Before distillation, crude methanol contains organic acids, making its pH value slightly acidic. To prevent the acidic feedstock from entering the distillation column and corroding the equipment, the crude methanol feedstock needs to be acidified by adding alkali before entering the distillation column. However, most current acidification systems add alkali directly at the feed pipe, which, due to incomplete and uneven mixing, easily leads to instability in the acidification system, causing large pH fluctuations. This can result in the acid entering the distillation column, corroding the equipment, and affecting the service life of the distillation column. Therefore, an alkali addition device for distillation is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an alkali addition device for distillation to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an alkali addition device for distillation, comprising a mixing tank, an alkali tank, a metering pump, a filter box, and a motor. A feeding pipe is connected to the rear side of the upper surface of the mixing tank. A flow meter is installed on the outer wall of the feeding pipe. The feeding pipe is connected to a crude methanol delivery pipeline. A suction pipe is fixedly connected to the upper surface of the alkali tank. One end of the inlet of the metering pump is connected to the left side wall of the filter box via a pipe. One end of the outlet of the metering pump is connected to the upper surface of the mixing tank via an alkali addition pipe. The upper surface of the filter box is connected to the top end of the suction pipe via a pipe. A filter plate is provided inside the filter box. One end of the output shaft of the motor extends into the interior of the mixing tank and is fixedly connected to a rotating shaft. A stirring rod is uniformly welded to the outer wall of the rotating shaft. A drain pipe is connected to the bottom of the front surface of the mixing tank, and a valve is installed on the outer wall of the drain pipe.

[0006] As a further preferred embodiment of this technical solution: a horizontal plate is fixedly connected to the right side wall of the mixing tank; the bottom of the alkali tank is fixedly connected to the upper surface of the horizontal plate; the bottom of the metering pump is installed on the front side of the upper surface of the mixing tank; the bottom of the filter box is fixedly connected to the right side of the upper surface of the mixing tank; the bottom of the motor is installed in the middle of the upper surface of the mixing tank; and the bottom end of the liquid extraction pipe extends into the interior of the alkali tank and is close to the inner bottom wall of the alkali tank.

[0007] As a further preferred embodiment of this technical solution: a slot is provided on the front surface of the filter box, an insert plate is inserted into the inner wall of the slot, a through groove is provided on the upper surface of the insert plate, the filter plate is fixedly connected to the inner wall of the through groove, a connecting plate is fixedly connected to the front surface of the insert plate, a pin hole is provided on the right side wall of the connecting plate, a fixing frame is fixedly connected to the front side of the right side wall of the filter box, and a pin is threadedly connected to the right side wall of the fixing frame.

[0008] As a further preferred embodiment of this technical solution: a knob is fixedly connected to the right end of the pin.

[0009] As a further preferred embodiment of this technical solution: a pull ring is fixedly connected to the front surface of the connecting plate.

[0010] As a further preferred embodiment of this technical solution: the front side of the upper surface of the filter box is connected to an addition pipe, and a sealing cap is threadedly connected to the top of the outer side wall of the addition pipe.

[0011] As a further preferred embodiment of this technical solution, the front surface of the filter box is provided with a viewing window.

[0012] As a further preferred embodiment of this technical solution: a control panel is installed on the front surface of the mixing tank, and the electrical output terminal of the control panel is electrically connected to the electrical input terminal of the metering pump and the motor respectively through wires, and the electrical output terminal of the flow meter is electrically connected to the electrical input terminal of the control panel through wires.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In operation, the crude methanol feed solution enters the mixing tank along the feed pipe. Under the suction of the metering pump, the alkali solution enters the mixing tank along the extraction pipe, filter box, and alkali addition pipe. The filter plate can filter out impurities in the alkali solution, preventing impurities from entering subsequent pipelines and equipment, causing blockage or damage. The motor drives the rotating shaft and stirring rod to rotate, accelerating the mixing between the crude methanol feed solution and the alkali solution, improving the uniform mixing effect, achieving acid adjustment, ensuring the stability of the pH value of the crude methanol feed solution, and preventing it from entering the distillation column and corroding the equipment during subsequent distillation, thus facilitating the distillation process of the feed solution. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the left-side structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the right-side structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the mixing tank in this utility model;

[0018] Figure 4 In this utility model Figure 2 Enlarged view of the structure of area A;

[0019] Figure 5 This is a schematic diagram of the filter box and slot in this utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the insert plate and filter plate in this utility model;

[0021] Figure 7 This is a cross-sectional view of the alkali tank in this utility model.

[0022] In the picture:

[0023] 1. Mixing tank; 2. Feeding pipe; 3. Flow meter; 4. Horizontal plate; 5. Alkali tank; 6. Metering pump; 7. Filter box; 8. Liquid extraction pipe; 9. Filter plate; 10. Alkali addition pipe; 11. Motor; 12. Shaft; 13. Stirring rod; 14. Drain pipe; 15. Valve; 16. Slot; 17. Insert plate; 18. Through groove; 19. Connecting plate; 20. Pin hole; 21. Pin rod; 22. Knob; 23. Pull ring; 24. Adding pipe; 25. Sealing cap; 26. Viewing window; 27. Control panel; 28. Fixing frame. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. 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.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "equipment" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] Please see Figure 1-7 This utility model provides a technical solution: an alkali addition device for distillation, including a mixing tank 1, an alkali tank 5, a metering pump 6, a filter box 7, and a motor 11. A feeding pipe 2 is connected to the rear side of the upper surface of the mixing tank 1. A flow meter 3 is installed on the outer wall of the feeding pipe 2. The feeding pipe 2 is connected to a crude methanol delivery pipeline. A suction pipe 8 is fixedly connected to the upper surface of the alkali tank 5. One end of the inlet of the metering pump 6 is connected to the left side wall of the filter box 7 through a pipe. One end of the outlet of the metering pump 6 is connected to the upper surface of the mixing tank 1 through an alkali addition pipe 10. The upper surface of the filter box 7 is connected to the top of the suction pipe 8 through a pipe. A filter plate 9 is provided inside the filter box 7. One end of the output shaft of the motor 11 extends into the interior of the mixing tank 1 and is fixedly connected to a rotating shaft 12. The outer wall of the rotating shaft 12 is uniformly welded... A stirring rod 13 is connected to the mixing tank 1. The bottom of the front surface of the mixing tank 1 is connected to a drain pipe 14, and a valve 15 is installed on the outer wall of the drain pipe 14. The drain pipe 14 is connected to the distillation column through an external delivery pump. The crude methanol feed liquid enters the mixing tank 1 along the feed pipe 2. Under the suction action of the metering pump 6, the alkali solution enters the mixing tank 1 along the suction pipe 8, the filter box 7 and the alkali addition pipe 10. The filter plate 9 can filter out impurities in the alkali solution, preventing impurities from entering the subsequent pipelines and equipment, causing blockage or damage. The motor 11 drives the rotating shaft 12 and the stirring rod 13 to rotate, which accelerates the mixing between the crude methanol feed liquid and the alkali solution, improves the uniform mixing effect, realizes acid adjustment, ensures the stability of the pH value of the crude methanol feed liquid, and avoids entering the distillation column during subsequent distillation to corrode the equipment, thus bringing convenience to the distillation work of the feed liquid.

[0027] In this embodiment, specifically: a horizontal plate 4 is fixedly connected to the right side wall of the mixing tank 1; the bottom of the alkali tank 5 is fixedly connected to the upper surface of the horizontal plate 4; the bottom of the metering pump 6 is installed on the front side of the upper surface of the mixing tank 1; the bottom of the filter box 7 is fixedly connected to the right side of the upper surface of the mixing tank 1; the bottom of the motor 11 is installed in the middle of the upper surface of the mixing tank 1; and the bottom end of the liquid extraction pipe 8 extends into the interior of the alkali tank 5 and is close to the inner bottom wall of the alkali tank 5.

[0028] In this embodiment, specifically: a slot 16 is provided on the front surface of the filter box 7, an insert plate 17 is inserted into the inner side wall of the slot 16, a through groove 18 is provided on the upper surface of the insert plate 17, the filter plate 9 is fixedly connected to the inner side wall of the through groove 18, a connecting plate 19 is fixedly connected to the front surface of the insert plate 17, a pin hole 20 is provided on the right side wall of the connecting plate 19, a fixing bracket 28 is fixedly connected to the front side of the right side wall of the filter box 7, and a pin rod 21 is threadedly connected to the right side wall of the fixing bracket 28; when installing the filter plate 9, the insert plate 17 is fully inserted into the slot 16, and the pin rod 21 is rotated clockwise to insert into the pin hole 20 to lock the connecting plate 19, thus locking the filter plate 9 inside the filter box 7. When the filter plate 9 needs to be removed for cleaning, the pin rod 21 is rotated counterclockwise to move away from the pin hole 20, and the insert plate 17 can be pulled out.

[0029] In this embodiment, specifically: a knob 22 is fixedly connected to the right end of the pin 21; this facilitates turning the pin 21.

[0030] In this embodiment, specifically: a pull ring 23 is fixedly connected to the front surface of the connecting plate 19; to facilitate the movement of the connecting plate 19.

[0031] In this embodiment, specifically: the front side of the upper surface of the filter box 7 is connected to an addition pipe 24, and the top of the outer wall of the addition pipe 24 is threaded with a sealing cap 25; alkaline solution can be added along the addition pipe 24, and tightening the sealing cap 25 can improve the sealing performance of the addition pipe 24.

[0032] In this embodiment, specifically: the front surface of the filter box 7 is provided with a viewing window 26; to facilitate observation of the liquid level of the alkaline solution.

[0033] In this embodiment, specifically: a control panel 27 is installed on the front surface of the mixing tank 1. The electrical output terminal of the control panel 27 is electrically connected to the electrical input terminal of the metering pump 6 and the motor 11 through wires, respectively. The electrical output terminal of the flow meter 3 is electrically connected to the electrical input terminal of the control panel 27 through wires; this facilitates the control of the working status of each electrical device.

[0034] The working principle of this utility model is as follows: Crude methanol solution enters the mixing tank 1 along the feeding pipe 2. Under the suction action of the metering pump 6, the alkali solution enters the mixing tank 1 along the extraction pipe 8, the filter box 7, and the alkali addition pipe 10. The filter plate 9 can filter out impurities in the alkali solution, preventing impurities from entering subsequent pipelines and equipment, causing blockage or damage. The motor 11 drives the rotating shaft 12 and the stirring rod 13 to rotate, accelerating the mixing between the crude methanol solution and the alkali solution, improving the uniform mixing effect, achieving acid adjustment, ensuring the stability of the pH value of the crude methanol solution, and preventing it from entering the distillation column and corroding the equipment during subsequent distillation, thus facilitating the distillation of the solution. When installing the filter plate 9, the insert plate 17 is fully inserted into the slot 16, and the pin rod 21 is rotated clockwise to insert into the pin hole 20 to lock the connecting plate 19, which can lock the filter plate 9 inside the filter box 7. When the filter plate 9 needs to be removed for cleaning, the pin rod 21 is rotated counterclockwise to move away from the pin hole 20, and the insert plate 17 can be pulled out.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An alkali addition apparatus for distillation, characterized in that: The system includes a mixing tank (1), an alkali tank (5), a metering pump (6), a filter box (7), and a motor (11). A feeding pipe (2) is connected to the rear side of the upper surface of the mixing tank (1). A flow meter (3) is installed on the outer wall of the feeding pipe (2). The feeding pipe (2) is connected to a crude methanol conveying pipeline. A suction pipe (8) is fixedly connected to the upper surface of the alkali tank (5). One end of the inlet of the metering pump (6) is connected to the left side wall of the filter box (7) through a pipe. One end of the outlet of the metering pump (6) is connected to the mixing tank (11). An alkali addition pipe (10) is connected between the upper surfaces of the 1), and the upper surface of the filter box (7) is connected to the top of the liquid extraction pipe (8) through a pipe. The filter box (7) is equipped with a filter plate (9). One end of the output shaft of the motor (11) extends into the interior of the mixing tank (1) and is fixedly connected to a rotating shaft (12). A stirring rod (13) is uniformly welded to the outer side wall of the rotating shaft (12). A drain pipe (14) is connected to the bottom of the front surface of the mixing tank (1), and a valve (15) is installed on the outer side wall of the drain pipe (14).

2. The alkali addition apparatus for distillation according to claim 1, characterized in that: A horizontal plate (4) is fixedly connected to the right side wall of the mixing tank (1). The bottom of the alkali tank (5) is fixedly connected to the upper surface of the horizontal plate (4). The bottom of the metering pump (6) is installed on the front side of the upper surface of the mixing tank (1). The bottom of the filter box (7) is fixedly connected to the right side of the upper surface of the mixing tank (1). The bottom of the motor (11) is installed in the middle of the upper surface of the mixing tank (1). The bottom end of the suction pipe (8) extends into the interior of the alkali tank (5) and is close to the inner bottom wall of the alkali tank (5).

3. The alkali addition apparatus for distillation according to claim 2, characterized in that: The front surface of the filter box (7) is provided with a slot (16), and an insert plate (17) is inserted into the inner side wall of the slot (16). The upper surface of the insert plate (17) is provided with a through groove (18). The filter plate (9) is fixedly connected to the inner side wall of the through groove (18). The front surface of the insert plate (17) is fixedly connected with a connecting plate (19). The right side wall of the connecting plate (19) is provided with a pin hole (20). The front side of the right side wall of the filter box (7) is fixedly connected with a fixing bracket (28). The right side wall of the fixing bracket (28) is threaded with a pin rod (21).

4. The alkali addition apparatus for distillation according to claim 3, characterized in that: A knob (22) is fixedly connected to the right end of the pin (21).

5. The alkali addition apparatus for distillation according to claim 4, characterized in that: A pull ring (23) is fixedly connected to the front surface of the connecting plate (19).

6. The alkali addition apparatus for distillation according to claim 5, characterized in that: The filter box (7) has an addition tube (24) connected to the front side of its upper surface, and a sealing cap (25) is threaded to the top of the outer side wall of the addition tube (24).

7. The alkali addition apparatus for distillation according to claim 6, characterized in that: The front surface of the filter box (7) is provided with a viewing window (26).

8. The alkali addition apparatus for distillation according to claim 7, characterized in that: The front surface of the mixing tank (1) is equipped with a control panel (27). The electrical output terminal of the control panel (27) is electrically connected to the electrical input terminal of the metering pump (6) and the motor (11) through wires. The electrical output terminal of the flow meter (3) is electrically connected to the electrical input terminal of the control panel (27) through wires.

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