Adsorption and desorption tank and device for removing water in n-propyl alcohol

Abstract

The utility model provides an adsorption and desorption tank which comprises a tank body, the tank body is vertically arranged, the upper end and the lower end of the tank body are respectively connected with an upper sealing head and a lower sealing head, the lower sealing head is connected with a three-way pipe, the upper sealing head is connected with a discharging pipe and an air inlet pipe, a supporting plate with holes is arranged at the lower end in the tank body, and a pressing plate with holes is arranged at the upper end in the tank body. A molecular sieve adsorption and desorption agent is filled between the porous supporting plate and the porous pressing plate; a bracket is further fixedly connected into the lower end socket, and the supporting plate with the holes abuts against the bracket. According to the utility model, the problem that the production cost is increased due to reduction of the normal propyl alcohol recycling amount caused by excessive water content in the prior art is solved. The utility model also provides a device for removing water in n-propyl alcohol, which comprises a pair of the adsorption and desorption tanks, and the two adsorption and desorption tanks are combined to alternately perform adsorption and desorption processes, so that the continuity of dehydration operation is ensured, and the overall production efficiency can be further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dehydration equipment technical field especially, relates to a kind of adsorption desorption tank and the device for removing water in n-propanol. BACKGROUND

[0002] N-propanol is generally recovered by rectifying column, the tower kettle of rectifying column is evaporated by steam heat exchange, the ascending gas enters rectifying column gradually to reach the top, and the top heat exchanger makes the ascending gas condense into condensed liquid fraction, and the condensed liquid fraction is divided into two parts by reflux valve control, part of fraction can flow back to rectifying column to participate in rectifying process, and reflux ratio is adjusted according to reflux amount, so that the extracted fraction is more pure, another part of fraction can be extracted and temporarily stored in n-propanol detection tank as recovered n-propanol, and recovered for use after detection is qualified. However, in actual production process, because the mother liquor contains a small amount of water, and the boiling point of water and n-propanol is small, it is difficult to separate by adjusting reflux ratio, and the water content of recovered n-propanol is often exceeded in actual production, which cannot be used, and can only be disposed as waste liquid. This increases the treatment amount and treatment cost of three wastes, and also loses single batch n-propanol, reduces the reuse amount of n-propanol, increases the use amount of new n-propanol, and increases the production cost. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model provides an adsorption desorption tank, which solves the problem of reduced n-propanol reuse amount and increased production cost caused by excessive water content in the prior art.

[0004] According to the embodiment of the utility model, an adsorption desorption tank comprises a tank body, the tank body is vertically arranged, and the upper end and the lower end are respectively connected with an upper head and a lower head, the lower head is connected with a tee pipe, the upper head is connected with a discharge pipe and an air inlet pipe, a perforated supporting plate is arranged at the lower end in the tank body, and a perforated pressing plate is arranged at the upper end, and molecular sieve adsorption desorption agent is filled between the perforated supporting plate and the perforated pressing plate; a bracket is fixedly connected in the lower head, and the perforated supporting plate abuts against the bracket.

[0005] In the above embodiment, one interface of the three-way pipe is used for the entry of the n-propanol in the tank to be inspected, and then enters the lower head through the interface connected to the lower head, and then passes through the perforated support plate to contact the molecular sieve adsorption desorbent. The molecular sieve adsorption desorbent absorbs moisture in the n-propanol, and then the n-propanol passes through the perforated pressure plate to enter the upper head, and then is led out through the discharge pipe and refluxed into the tank to be inspected. After several cycles, the moisture in the n-propanol is gradually reduced to a qualified level, the introduction of the n-propanol is disconnected and the n-propanol in the tank body is emptied, and then hot nitrogen is introduced into the upper head through the air inlet pipe for nitrogen blowing. The hot nitrogen passes through the perforated pressure plate and enters the molecular sieve adsorption desorbent, moves downward and passes through the perforated support plate, taking away moisture in the process, and the molecular sieve adsorption desorbent recovers its function, and then the next round of operation is carried out, thereby removing moisture in the n-propanol, reducing the water content to a qualified level, and being able to reuse more n-propanol, thereby solving the problem in the prior art that the amount of n-propanol reuse is reduced and production costs are increased due to excessive water content.

[0006] Furthermore, a first supporting ring is fixedly connected to the inner wall of the lower end of the tank body, a ring platform that can be placed on the first supporting ring is provided on the outer edge of the perforated supporting plate, and the first supporting ring and the perforated supporting plate are connected by a first screw.

[0007] Furthermore, the perforated support plate is a downwardly convex arc structure, and the bracket includes a plurality of inclined rods fixedly connected to the inner wall of the lower head, a tray fixedly connected to all the inclined rods, and a plurality of top rods fixedly connected to the tray, all of which extend obliquely upward and abut against the center of the perforated support plate.

[0008] Furthermore, a lower end of the diagonal rod is connected to the tray.

[0009] Furthermore, the upper end surface of the tray is an upwardly convex arc surface.

[0010] Furthermore, a second supporting ring is fixedly provided on the inner wall of the upper end of the tank body, and the perforated pressure plate is connected to the upper ring surface of the second supporting ring through a second screw.

[0011] Furthermore, an arc-shaped transition is formed between the inner wall of the tank body below the second supporting ring and the inner ring wall of the second supporting ring.

[0012] Furthermore, the molecular sieve adsorption-desorption agent is a 4A grade sieve.

[0013] According to an embodiment, a device for removing water from n-propanol is also provided, which includes a pair of the above-mentioned adsorption and desorption tanks.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By setting up an adsorption and desorption tank, the molecular sieve adsorption and desorption agent in the tank absorbs the water in the n-propanol. After several cycles, the water content in the n-propanol is gradually reduced to a qualified level, and more n-propanol can be reused, solving the problem of the existing technology that the amount of n-propanol reuse is reduced and the production cost is increased due to excessive water content;

[0016] By combining two adsorption and desorption tanks, the adsorption and desorption processes are carried out alternately to ensure the continuity of the dehydration operation and further improve the overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 A magnified schematic diagram of the local structure at center A;

[0019] Figure 3 for Figure 1 A magnified schematic diagram of the local structure at point B in the middle;

[0020] In the above drawings:

[0021] Tank body 1, upper head 2, lower head 3, tee pipe 4, discharge pipe 5, air inlet pipe 6, perforated support plate 7, perforated pressure plate 8, molecular sieve adsorption and desorption agent 9, connecting ring 10, bolt 11, first support ring 12, first screw 13, inclined rod 14, tray 15, top rod 16, second support ring 17, second screw 18. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0024] In an exemplary embodiment, Figure 1-3As shown, this embodiment provides an adsorption desorption tank, which includes a tank body 1, the tank body 1 is vertically arranged and the upper and lower ends are respectively connected to an upper head 2 and a lower head 3, the lower head 3 is connected to a tee pipe 4, the upper head 2 is connected to a discharge pipe 5 and an air inlet pipe 6, a perforated support plate 7 is provided at the lower end of the tank body 1, and a perforated pressure plate 8 is provided at the upper end, and a molecular sieve adsorption desorbent 9 is also filled between the perforated support plate 7 and the perforated pressure plate 8; a bracket is also fixedly connected to the lower head 3, and the perforated support plate 7 is abutted against the bracket, and the upper head 2 and the tank body 1, as well as the lower head 3 and the tank body 1 are connected by a connecting ring 10 and a bolt 11, wherein the perforated support plate 7 and the perforated pressure plate 8 are respectively provided with holes, but the apertures of these holes are smaller than the particle size of the molecular sieve adsorption desorbent 9, thereby ensuring that the molecular sieve adsorption desorbent 9 is stably filled between the perforated support plate 7 and the perforated pressure plate 8.

[0025] In the above embodiment, one interface of the three-way pipe 4 is used for the n-propanol in the tank to be inspected to enter (the three-way pipe 4 is provided with a three-way valve to control the on and off of each interface), and then enters the lower head 3 through the interface connected to the lower head 3, and then passes through the perforated support plate 7 to contact with the molecular sieve adsorption desorbent 9. The molecular sieve adsorption desorbent 9 absorbs the moisture in the n-propanol, and then the n-propanol passes through the perforated pressure plate 8 to enter the upper head 2, and then is led out through the discharge pipe 5 and refluxed into the tank to be inspected. After several cycles, the moisture in the n-propanol is gradually reduced to a qualified level, the n-propanol introduction is disconnected, and the n-propanol in the tank body 1 is emptied (such as Figure 1 As shown, it can be emptied through another laterally arranged interface), and then hot nitrogen is introduced into the upper head 2 through the air inlet pipe 6 for nitrogen blowing. The hot nitrogen passes through the perforated pressure plate 8 and enters the molecular sieve adsorption desorbent 9, moves downward and passes through the perforated support plate 7, and then water and nitrogen are exported through the arranged horizontal interface, taking away moisture in the process, and the molecular sieve adsorption desorbent 9 recovers its function and performs the next round of operation, thereby removing moisture in the n-propanol, reducing the water content to a qualified level, and being able to reuse more n-propanol, solving the problem in the prior art that the amount of n-propanol reuse is reduced and the production cost is increased due to excessive water content; in more detail, the molecular sieve adsorption desorbent 9 arranged can be a 4A molecular sieve, and at the same time, a bracket is also provided below the perforated support plate 7 to provide support for the perforated support plate 7, so that the perforated support plate 7 can be more stable.

[0026] A better solution, such as Figure 1 As shown, a device for removing water from n-propanol is provided, which includes a pair of the above-mentioned adsorption and desorption tanks. By combining the two adsorption and desorption tanks, adsorption and desorption are alternately performed to ensure the continuity of the dehydration operation, which can further improve the overall production efficiency.

[0027] like Figure 1 、 2As shown, a first supporting ring 12 is fixedly connected to the inner wall of the lower end of the tank body 1, and a ring platform that can be placed on the first supporting ring 12 is provided on the outer edge of the perforated supporting plate 7, and the first supporting ring 12 and the perforated supporting plate 7 are connected by a first screw 13. The first supporting ring 12 provides a push for the perforated supporting plate 7 at the outer edge, and the bracket provides an upward support in the middle, so that the perforated supporting plate 7 has better stability. Specifically, the perforated supporting plate 7 is a downward convex arc structure, so that the relative area of ​​the perforated supporting plate 7 is larger, and the bracket includes a plurality of inclined rods 14 fixedly connected to the inner wall of the lower head 3, and a plurality of inclined rods 14 fixedly connected to all The tray 15 is fixedly connected to the oblique rod 14, and multiple push rods 16 are fixedly connected to the tray 15. All push rods 16 extend obliquely upward and abut against the center of the perforated support plate 7. The oblique rod 14 extends obliquely downward toward the center, so that the tray 15 is located at a low place, and the push rods 16 extend obliquely upward and outward, which also makes the tray 15 located at a relatively low place. When nitrogen blowing is performed, water can flow more smoothly downward along the oblique rods 14 and the push rods 16 without being retained. In further detail, the upper end surface of the tray 15 is a convex arc surface, and water will not be retained on the tray 15.

[0028] like Figure 1 、 3 As shown, a second supporting ring 17 is fixedly provided on the inner wall of the upper end of the tank body 1, and the perforated pressure plate 8 is connected to the upper annular surface of the second supporting ring 17 through a second screw 18. The second supporting ring 17 supports the perforated pressure plate 8 upward, and the two are locked by the second screw 18. In more detail, the inner wall of the tank body 1 below the second supporting ring 17 forms an arc-shaped transition with the inner annular wall of the second supporting ring 17, so that the molecular sieve adsorption desorbent 9 filled at this position is not prone to voids, the filling is more solid, and it is more stable during operation.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An adsorption and desorption tank, characterized in that: It includes a tank body, which is arranged vertically and has an upper head and a lower head connected to the upper and lower ends respectively, the lower head is connected to a tee pipe, the upper head is connected to a discharge pipe and an air inlet pipe, a perforated support plate is provided at the lower end of the tank body, and a perforated pressure plate is provided at the upper end, and a molecular sieve adsorption and desorption agent is also filled between the perforated support plate and the perforated pressure plate; a bracket is also fixedly connected to the lower head, and the perforated support plate abuts against the bracket.

2. The adsorption and desorption tank according to claim 1, characterized in that: A first supporting ring is fixedly connected to the inner wall of the lower end of the tank body, and a ring platform that can be placed on the first supporting ring is provided at the outer edge of the perforated supporting plate, and the first supporting ring and the perforated supporting plate are connected by a first screw.

3. The adsorption and desorption tank according to claim 1, characterized in that: The perforated support plate is a downwardly convex arc structure, and the bracket includes a plurality of inclined rods fixedly connected to the inner wall of the lower head, a tray fixedly connected to all the inclined rods, and a plurality of top rods fixedly connected to the tray, all of the top rods extend obliquely upward and abut against the center of the perforated support plate.

4. The adsorption and desorption tank according to claim 3, characterized in that: The lower end of the inclined rod is connected to the tray.

5. The adsorption and desorption tank according to claim 4, characterized in that: The upper end surface of the tray is an upwardly convex arc surface.

6. The adsorption and desorption tank according to claim 1, characterized in that: A second supporting ring is fixedly provided on the inner wall of the upper end of the tank body, and the perforated pressure plate is connected to the upper annular surface of the second supporting ring through a second screw.

7. The adsorption and desorption tank according to claim 6, characterized in that: An arc-shaped transition is formed between the inner wall of the tank body below the second supporting ring and the inner ring wall of the second supporting ring.

8. The adsorption-desorption tank according to any one of claims 1 to 7, characterized in that: The molecular sieve adsorption desorbent is a 4A sieve.

9. A device for removing water from n-propanol, characterized in that: The method comprises a pair of adsorption and desorption tanks according to any one of claims 1 to 8.

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