Hydroxypropyl methyl cellulose wastewater treating and recycling device

Abstract

The utility model discloses a hydroxypropyl methyl cellulose wastewater treating and recycling device which comprises a material injection pipe and a liquid injection valve fixedly connected to the top of the material injection pipe, a liquid distribution disc is fixedly connected to an inner cavity of the material injection pipe, a plurality of evenly-distributed liquid distribution holes are formed in the surface of the liquid distribution disc, a pipe barrel is fixedly connected to the lower portion of the material injection pipe, and the pipe barrel is fixedly connected to the upper portion of the material injection pipe. After wastewater stock solution is injected into each guide pipe through the liquid distribution disc, uniform liquid films are formed along the inner walls of the guide pipes, the liquid films formed on the inner walls of the guide pipes are heated by steam in the downward flowing process and are boiled and evaporated in the downward flowing process, one part of the wastewater stock solution is changed into concentrated solution at the bottom end of the pipe barrel, and the other part of the wastewater stock solution is changed into secondary steam; the secondary steam is discharged into the gas-liquid separator through the return pipe, the gas-liquid separator removes liquid droplets mixed in the secondary steam, the pure secondary steam is injected into the exhaust pipe again through the gas guide pipe and the compressor to be heated to serve as heating steam for continuous heating, and heat waste is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydroxypropyl methylcellulose, in particular to a device for treating and recycling hydroxypropyl methylcellulose wastewater. Background Technique

[0002] Hydroxypropyl methylcellulose is a powdery substance that is non-toxic, odorless, colorless, and not easily hygroscopic. It belongs to one of the non-ionic cellulose mixed ethers and is a semi-synthetic, inactive, viscoelastic polymer. This compound is synthesized by the methylation and hydroxypropylation reactions of cellulose, and the hydroxypropyl group and methyl group therein can adjust its hydrolysis rate and thermal stability.

[0003] There are multiple processing steps in the process of treating and recycling hydroxypropyl methylcellulose wastewater, especially the problem of involving a large amount of water consumption. When treating hydroxypropyl methylcellulose wastewater, in order to achieve an effective treatment effect, a large amount of water is required for dilution, rinsing, or as a reaction medium, which not only increases the consumption of water resources but also increases the treatment cost.

[0004] Therefore, we propose a device for treating and recycling hydroxypropyl methylcellulose wastewater to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a device for treating and recycling hydroxypropyl methylcellulose wastewater to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A device for treating and recycling hydroxypropyl methylcellulose wastewater, including a feeding pipe and a liquid injection valve fixedly connected to the top of the feeding pipe. A liquid distribution plate is fixedly connected to the inner cavity of the feeding pipe, and a plurality of uniformly distributed liquid distribution holes are formed on the surface of the liquid distribution plate. A pipe barrel is fixedly connected below the feeding pipe, and multiple groups of guiding pipes are arranged in the inner cavity of the pipe barrel. An exhaust pipe is fixedly connected to the surface of the feeding pipe, and the other end of the exhaust pipe is fixedly connected to a compressor;

[0007] A guide pipe is fixedly connected to the surface of the compressor, and the other end of the guide pipe is fixedly connected to a gas-liquid separator. Two groups of return pipes are fixedly connected to the surface of the gas-liquid separator, and the other ends of the two groups of return pipes are both fixedly connected to the surface of the pipe barrel.

[0008] Preferably, a liquid distribution cap is fixedly connected to the top of the liquid distribution plate, and the liquid distribution cap is vertically perpendicular to the lower part directly below the liquid injection valve.

[0009] Preferably, the pipe barrel is made of heat-insulating material.

[0010] Preferably, the top ends of the guiding pipes all penetrate through the bottom of the feeding pipe.

[0011] Preferably, the guiding tubes correspond to the liquid distribution holes respectively, and the guiding tubes are all vertically perpendicular to the position directly below the liquid distribution holes.

[0012] Preferably, the guiding tubes are made of heat-conducting material.

[0013] Preferably, a hole plate for supporting the guiding tubes is fixedly connected to the inner wall of the tube barrel.

[0014] Preferably, the guiding tubes are made of heat-conducting material.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] After the waste liquid stock solution is injected into each guiding tube through the liquid distribution plate, a uniform liquid film is formed along the inner wall of the guiding tube. The liquid film formed on the inner wall of the guiding tube is heated by steam during the downward flow. During the downward flow, it boils and evaporates. Part of the waste liquid stock solution becomes concentrated liquid and part becomes secondary steam at the bottom of the tube barrel, and then is discharged into the gas-liquid separator through the return pipe. The gas-liquid separator removes the liquid droplets mixed in the secondary steam, and the pure secondary steam is injected into the exhaust pipe again through the air guide pipe and the compressor for heating as heating steam for continuous heating, thus avoiding waste of heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural view of the front sectional view of the present utility model;

[0018] Figure 2 is a schematic structural view of the hole plate of the present utility model seen from above;

[0019] Figure 3 is a three-dimensional schematic structural view of the liquid distribution plate and the liquid distribution cap of the present utility model.

[0020] In the figure: 1, injection pipe; 2, injection valve; 3, liquid distribution plate; 4, liquid distribution hole; 5, tube barrel; 6, guiding tube; 7, exhaust pipe; 8, compressor; 9, air guide pipe; 10, gas-liquid separator; 11, return pipe; 12, liquid distribution cap; 13, hole plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 - 3, the present utility model provides a technical solution: the hydroxypropyl methylcellulose wastewater treatment and reuse device includes a feeding pipe 1 and a liquid injection valve 2 fixedly connected to the top of the feeding pipe 1. The wastewater stock solution is injected into the inner cavity of the feeding pipe 1 through the liquid injection valve 2 fixedly connected to the top of the feeding pipe 1. The liquid distribution cap 12 fixedly connected to the top of the liquid distribution plate 3 is vertically perpendicular to the lower part of the liquid injection valve 2. The liquid distribution cap 12 softens the injected wastewater stock solution to ensure that the wastewater stock solution can evenly pass through the liquid distribution holes 4 formed on the surface of the liquid distribution plate 3 and pour into the guiding pipe 6 arranged inside the pipe barrel 5.

[0023] Please refer to Figures 1 - 3 , after the wastewater stock solution is injected into each guiding pipe 6 through the liquid distribution plate 3, a uniform liquid film is formed along the inner wall of the guiding pipe 6. A steam joint is provided on the surface of the exhaust pipe 7. The hot air in the exhaust pipe 7 is injected and discharged into the pipe barrel 5 by using a compressor 8. The guiding pipe 6 is made of a heat-conducting material. The liquid film formed on the inner wall of the guiding pipe 6 is heated by the steam during the downward flow. It boils and evaporates while flowing downward. Part of the wastewater stock solution becomes concentrated liquid and part becomes secondary steam at the bottom of the pipe barrel 5. Then it is discharged into the gas-liquid separator 10 through the return pipe 11. The gas-liquid separator 10 removes the liquid droplets mixed in the secondary steam. The pure secondary steam is injected into the exhaust pipe 7 again through the air duct 9 and the compressor 8 for heating and used as heating steam for continuous heating, avoiding waste of heat. The condensate generated during the evaporation process is also recovered, and is subjected to collection, filtration, disinfection and other treatments to meet the reuse standard. The condensate can be reused in the washing, cooling and other links in the production process of hydroxypropyl methylcellulose, realizing the recycling of water resources.

[0024] Working principle: The waste liquid stock solution is injected into the inner cavity of the charging pipe 1 through the liquid injection valve 2 fixedly connected to the top of the charging pipe 1. The liquid distribution cap 12 fixedly connected to the top of the liquid distribution plate 3 is vertically perpendicular to the lower part of the liquid injection valve 2. The liquid distribution cap 12 eases the injected waste liquid stock solution to ensure that the waste liquid stock solution can evenly pass through the liquid distribution holes 4 on the surface of the liquid distribution plate 3 and pour into the guiding pipe 6 arranged inside the pipe barrel 5. After the waste liquid stock solution is injected into each guiding pipe 6 through the liquid distribution plate 3, a uniform liquid film is formed along the inner wall of the guiding pipe 6. The surface of the exhaust pipe 7 is provided with a steam joint, and the hot air in the exhaust pipe 7 is injected into the pipe barrel 5 by using the compressor 8. The guiding pipe 6 is made of heat-conducting material, and the liquid film formed on the inner wall of the guiding pipe 6 is heated by the steam during the downward flow. It boils and evaporates during the downward flow. Part of the waste liquid stock solution becomes concentrated liquid and part becomes secondary steam at the bottom of the pipe barrel 5, and then is discharged into the gas-liquid separator 10 through the return pipe 11. The gas-liquid separator 10 removes the liquid droplets mixed in the secondary steam. The pure secondary steam is injected into the exhaust pipe 7 again through the air guide pipe 9 and the compressor 8 for heating as heating steam for continuous heating, avoiding waste of heat. The condensate generated during the evaporation process is also recovered, and is subjected to collection, filtration, disinfection and other treatments to meet the reuse standard. The condensate can be reused in the washing, cooling and other links in the production process of hydroxypropyl methylcellulose, realizing the recycling of water resources, and solving the problem that when treating hydroxypropyl methylcellulose wastewater, in order to achieve effective treatment effect, a large amount of water needs to be used for dilution, flushing or as a reaction medium, which not only increases the consumption of water resources, but also increases the treatment cost.

[0025] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydroxypropyl methylcellulose wastewater treatment and reuse device, comprising an injection pipe (1) and an injection valve (2) fixedly connected to the top of the injection pipe (1), characterized in that: The inner cavity of the injection pipe (1) is fixedly connected to a liquid separation plate (3), and a plurality of evenly distributed liquid separation holes (4) are provided on the surface of the liquid separation plate (3); a tube barrel (5) is fixedly connected below the injection pipe (1), and a plurality of groups of guide tubes (6) are provided in the inner cavity of the tube barrel (5); an exhaust pipe (7) is fixedly connected to the surface of the injection pipe (1), and the other end of the exhaust pipe (7) is fixedly connected to a compressor (8); The compressor (8) is fixedly connected to an air guide pipe (9) on its surface, and the other end of the air guide pipe (9) is fixedly connected to a gas-liquid separator (10), and the surface of the gas-liquid separator (10) is fixedly connected to two groups of return pipes (11), and the other ends of the two groups of return pipes (11) are fixedly connected to the surface of the pipe barrel (5).

2. The hydroxypropyl methylcellulose wastewater treatment and reuse device according to claim 1, characterized in that: A liquid separation cap (12) is fixedly connected to the top of the liquid separation plate (3), and the liquid separation cap (12) is vertically perpendicular to the bottom of the liquid injection valve (2).

3. The hydroxypropyl methylcellulose wastewater treatment and reuse device according to claim 1, characterized in that: The tube barrel (5) is made of heat-insulating material.

4. The hydroxypropyl methylcellulose wastewater treatment and reuse device according to claim 1, characterized in that: The top end of the guide tube (6) passes through the bottom of the injection tube (1).

5. The hydroxypropyl methylcellulose wastewater treatment and reuse device according to claim 4, characterized in that: The guide tubes (6) all correspond to the liquid separation holes (4), and the guide tubes (6) are all vertically perpendicular to the bottom of the liquid separation holes (4).

6. The hydroxypropyl methylcellulose wastewater treatment and reuse device according to claim 1, characterized in that: The guide tube (6) is made of a heat-conducting material.

7. The hydroxypropyl methylcellulose wastewater treatment and reuse device according to claim 1, characterized in that: The inner wall of the tube barrel (5) is fixedly connected with a hole plate (13) for providing support for the guide tube (6).

8. The hydroxypropyl methylcellulose wastewater treatment and reuse device according to claim 1, characterized in that: The guide tube (6) is made of a heat-conducting material.

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