Distillation device for producing hydroxypropyl methyl cellulose

Abstract

The distilling device comprises a shell barrel and a heating barrel arranged in an inner cavity of the shell barrel, the top of the shell barrel is fixedly connected with an input valve port, the input valve port sequentially penetrates through the shell barrel and the surface of the top of the heating barrel, the top of the heating barrel is fixedly connected with a guide pipe, and the guide pipe is connected with the heating barrel. The guide pipe penetrates through the surface of the top of the shell barrel and extends to the outside, the surface of the guide pipe is fixedly connected with a condensation pipe, the other end of the condensation pipe is fixedly connected with a discharge filter pipe, condensate water is added into the water flowing cavity through the two sets of connecting valve ports for cooling, the temperature of the condensation pipe is reduced, hydroxypropyl methyl cellulose steam circulates in a condensation channel, and the heat dissipation efficiency is improved. Hydroxypropyl methyl cellulose steam is adsorbed on the inner wall of the condensation channel in a film mode, forming of bubbles is facilitated, meanwhile, surface friction treatment and protrusions of the circle center also play a promoting role, and the condensation effect is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of hydroxypropyl methylcellulose, in particular to a distillation device for producing hydroxypropyl methylcellulose. Background Art

[0002] Hydroxypropyl methylcellulose is a non-toxic, odorless, colorless, non-hygroscopic powder. It is a type of non-ionic cellulose mixed ether and a semi-synthetic, inactive, viscoelastic polymer. This compound is synthesized from cellulose through methylation and hydroxypropylation reactions, in which the hydroxypropyl group and methyl group can adjust its hydrolysis rate and thermal stability.

[0003] There are multiple processing steps in the production of hydroxypropyl methylcellulose. Distillation is used to remove by-products, unreacted raw materials or solvents produced in the hydroxypropyl methylcellulose reaction, thereby obtaining a product with higher purity. During the distillation process, if condensation is not timely, part of the evaporated hydroxypropyl methylcellulose may not be effectively collected, resulting in product loss and increasing the risk of impurities entering the target product, thereby reducing the purity of the product.

[0004] Therefore, we propose a distillation device for producing hydroxypropyl methylcellulose to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a distillation device for producing hydroxypropyl methylcellulose to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a distillation device for producing hydroxypropyl methylcellulose, comprising an outer shell barrel and a heating barrel arranged in the inner cavity of the outer shell barrel, the top of the outer shell barrel is fixedly connected with an input valve port, and the input valve port successively penetrates the top surface of the outer shell barrel and the top surface of the heating barrel, the top of the heating barrel is fixedly connected with a guide pipe, and the guide pipe penetrates the top surface of the outer shell barrel and extends to the outside, the surface of the guide pipe is fixedly connected with a condenser pipe, and the other end of the condenser pipe is fixedly connected with a discharge filter pipe, and the bottom of the discharge filter pipe is fixedly connected with a recovery box;

[0007] A heating wire is arranged on the surface of the heating barrel, and the heating wire is wound on the surface of the heating wire in a snake shape.

[0008] Preferably, a plurality of evenly distributed condensation channels are provided on the surface of the condenser tube.

[0009] Preferably, two groups of connecting valve ports are fixedly connected to the surface of the condenser, and a water flow cavity is opened inside the condenser.

[0010] Preferably, the inner wall of the condensation channel is provided with a plurality of evenly distributed circular protrusions.

[0011] Preferably, the outer shell barrel is configured to be made of a heat-insulating material, and the condenser is configured to be made of a heat-conducting material.

[0012] Preferably, the inner wall of the condensation channel is roughened by frosting.

[0013] Preferably, a placement seat is fixedly connected to the bottom of the outer shell barrel.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] Condensate is added into the water flow cavity through two sets of connecting valve ports to cool down the temperature of the condenser tube. Hydroxypropyl methylcellulose vapor circulates in the condensation channel and is adsorbed on the inner wall of the condensation channel in the form of a film, which helps the formation of bubbles. At the same time, the surface friction treatment and the bulge in the center of the circle also play a promoting role and accelerate the condensation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model in front view section;

[0017] Figure 2 This is a schematic diagram of the structure of the condenser tube of the utility model in a top view;

[0018] Figure 3 It is a schematic diagram of the structure of the outer shell barrel and the heating barrel in a top view of the cross section of the utility model.

[0019] In the figure: 1. outer shell barrel; 2. heating barrel; 3. input valve port; 4. guide pipe; 5. condenser pipe; 6. discharge filter pipe; 7. recovery box; 8. heating wire; 9. condensation channel; 10. connecting valve port; 11. water flow chamber; 12. placement seat. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3The utility model provides a technical solution: a distillation device for producing hydroxypropyl methylcellulose, comprising an outer shell barrel 1 and a heating barrel 2 arranged in the inner cavity of the outer shell barrel 1, the hydroxypropyl methylcellulose solution is input into the inner cavity of the heating barrel 2 through the input valve port 3, at this time, the heating wire 8 fixedly connected to the surface of the heating barrel 2 is started to heat the heating barrel 2, the outer shell barrel 1 is set to a heat-insulating material to avoid heat transfer to the outside and cause heat waste, the placement seat 12 provides support for the outer shell barrel 1, when the hydroxypropyl methylcellulose solution is heated to become steam.

[0022] See also Figure 1-3 The hydroxypropyl methylcellulose vapor is guided along the guide tube 4 to flow into the condenser 5, and condensed water is added to the water flow chamber 11 through two sets of connecting valve ports 10 to cool down the condenser 5. The hydroxypropyl methylcellulose vapor flows in the condensation channel 9. The hydroxypropyl methylcellulose vapor is adsorbed on the inner wall of the condensation channel 9 in the form of a film, which is conducive to the formation of bubbles. At the same time, the surface friction treatment and the bulge in the center of the circle also play a promoting role, accelerating the condensation effect.

[0023] See also Figure 1-3 The condensed water passes through the discharge filter tube 6 and is collected in the recovery box 7. The discharge filter tube 6 intercepts and recovers the hydroxypropyl methylcellulose, completing the purification operation of the hydroxypropyl methylcellulose to prevent impurities from contaminating the hydroxypropyl methylcellulose and affecting the quality of the hydroxypropyl methylcellulose.

[0024] Working principle: The hydroxypropyl methylcellulose solution is input into the inner cavity of the heating barrel 2 through the input valve port 3. At this time, the heating wire 8 fixedly connected to the surface of the heating barrel 2 is started to heat the heating barrel 2. The outer shell barrel 1 is set to be a heat-insulating material to avoid heat transfer to the outside and cause heat waste. The placement seat 12 provides support for the outer shell barrel 1. When the hydroxypropyl methylcellulose solution is heated and turned into steam, the hydroxypropyl methylcellulose steam is guided by the guide pipe 4 to flow into the condenser 5. Condensed water is added to the water flow cavity 11 through two sets of connecting valve ports 10 to cool down the temperature of the condenser 5. The hydroxypropyl methylcellulose steam circulates in the condensation channel 9. The hydroxypropyl methylcellulose steam is in the form of a thin film. The condensed water passes through the discharge filter tube 6 and is collected in the recovery box 7. The discharge filter tube 6 intercepts and recovers the hydroxypropyl methylcellulose to complete the purification of the hydroxypropyl methylcellulose, thereby preventing impurities from contaminating the hydroxypropyl methylcellulose and affecting its quality. This solves the problem that if the condensation is not timely during the distillation process, part of the evaporated hydroxypropyl methylcellulose may not be effectively collected, resulting in product loss, and also increases the risk of impurities entering the target product, thereby reducing the purity of the product.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A distillation device for producing hydroxypropyl methylcellulose, comprising an outer shell barrel (1) and a heating barrel (2) arranged in the inner cavity of the outer shell barrel (1), characterized in that: The top of the outer shell barrel (1) is fixedly connected with an input valve port (3), and the input valve port (3) successively penetrates the top surfaces of the outer shell barrel (1) and the heating barrel (2); the top of the heating barrel (2) is fixedly connected with a guide pipe (4), and the guide pipe (4) penetrates the top surface of the outer shell barrel (1) and extends to the outside; the surface of the guide pipe (4) is fixedly connected with a condenser pipe (5), and the other end of the condenser pipe (5) is fixedly connected with a discharge filter pipe (6), and the bottom of the discharge filter pipe (6) is fixedly connected with a recovery box (7); A heating wire (8) is provided on the surface of the heating barrel (2), and the heating wire (8) is wound on the surface of the heating wire (8) in a serpentine shape.

2. A distillation apparatus for producing hydroxypropyl methylcellulose according to claim 1, characterized in that: The surface of the condensation tube (5) is provided with a plurality of evenly distributed condensation channels (9).

3. A distillation apparatus for producing hydroxypropyl methylcellulose according to claim 1, characterized in that: Two groups of connecting valve ports (10) are fixedly connected to the surface of the condenser tube (5), and a water flow cavity (11) is provided inside the condenser tube (5).

4. A distillation apparatus for producing hydroxypropyl methylcellulose according to claim 2, characterized in that: The inner wall of the condensation channel (9) is provided with a plurality of evenly distributed circular protrusions.

5. A distillation apparatus for producing hydroxypropyl methylcellulose according to claim 1, characterized in that: The outer shell barrel (1) is configured to be made of a heat-insulating material, and the condenser tube (5) is configured to be made of a heat-conducting material.

6. A distillation apparatus for producing hydroxypropyl methylcellulose according to claim 2, characterized in that: The inner wall of the condensation channel (9) is subjected to a rough surface treatment by frosting.

7. A distillation apparatus for producing hydroxypropyl methylcellulose according to claim 1, characterized in that: A placement seat (12) is fixedly connected to the bottom of the outer shell barrel (1).

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