A double-column concentration device

Abstract

The utility model provides a kind of double-tower concentration device, it is related to DMF wastewater concentration field, it includes: base, the top of the base is equipped with primary dehydration tower, the top of the base is equipped with secondary dehydration tower, the surface of the primary dehydration tower is equipped with pipeline one, the other end of the pipeline one is installed in the surface of secondary dehydration tower, the surface of the pipeline one is equipped with liquid pump two.The utility model, through the series connection between primary dehydration tower and secondary dehydration tower, waste liquid is purified to 25%-35% by primary dehydration tower, then waste liquid enters secondary dehydration tower to make waste liquid purification to 35%-50%, so that waste liquid can be better purified, waste steam enters the inside of compressor after secondary heating, enters the inside of heat exchanger one and heat exchanger two to condense and liquefy, liquid will enter the inside of buffer tank, part of liquid is discharged, another part enters the inside of primary dehydration tower and secondary dehydration tower to be purified again, so that waste liquid can be better purified.

Description

Technical Field

[0001] This utility model relates to the field of DMF wastewater concentration technology, and in particular to a dual-tower concentration device. Background Technology

[0002] DMF wastewater concentration refers to the treatment of industrial wastewater containing N,N-dimethylformamide (DMF) by increasing the concentration of DMF in the wastewater through specific processes to achieve DMF recovery or more efficient subsequent treatment. In existing technologies, DMF wastewater solutions need to be concentrated before distillation. Commonly used equipment on the market consists of a single tower and a reboiler, which is suitable for treating small amounts of wastewater, but inefficient for large quantities, failing to meet process requirements. Using a single tower for wastewater purification also results in insufficient purification effects. Utility Model Content

[0003] The purpose of this invention is to provide a dual-tower concentration device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a dual-tower concentration device, comprising: a base, a primary dehydration tower installed on the top of the base, a secondary dehydration tower installed on the top of the base, a pipe I installed on the surface of the primary dehydration tower, the other end of the pipe I installed on the surface of the secondary dehydration tower, a liquid pump II installed on the surface of the pipe I, a discharge pipe installed on the surface of the secondary dehydration tower, and a liquid pump I installed on the surface of the discharge pipe.

[0005] In a preferred embodiment, a compressor is mounted on the top of the base, an exhaust pipe is mounted on the surface of the compressor, the other end of the exhaust pipe is mounted on the top of the primary dehydration tower, an exhaust pipe is mounted on the surface of the compressor, and the other end of the exhaust pipe is mounted on the top of the secondary dehydration tower.

[0006] In a preferred embodiment, a heat exchanger is installed on the surface of the primary dehydration tower, a heat exchanger is installed on the surface of the secondary dehydration tower, a pipe is installed on the surface of the compressor, the other end of the pipe is installed on the surface of the heat exchanger, and a pipe is installed on the surface of the compressor, the other end of the pipe is installed on the surface of the heat exchanger.

[0007] In a preferred embodiment, a buffer tank is installed on the top of the base, a pipe four is installed on the surface of the buffer tank, the other end of the pipe four is installed on the surface of heat exchanger one, a pipe five is installed on the surface of the buffer tank, and the other end of the pipe five is installed on the surface of heat exchanger two.

[0008] In a preferred embodiment, the surface of the buffer tank is fitted with a pipe six, the other end of which is fitted onto the surface of the primary dehydration tower.

[0009] In a preferred embodiment, the surface of the buffer tank is fitted with a pipe seven, the other end of which is fitted onto the surface of the secondary dehydration tower.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. This utility model uses a dual-tower purification method. The primary and secondary dehydration towers are connected in series. The purification effect of the waste liquid purified by the primary dehydration tower can reach 25%-35%. Then the waste liquid enters the secondary dehydration tower for purification, so that the purification effect can reach 35%-50%. This allows the waste liquid to be purified better and makes the device more perfect.

[0011] 2. In this utility model, the waste liquid vapor during the purification process enters the compressor through waste gas pipe one and waste gas pipe two for secondary heating, and then enters the heat exchanger one and heat exchanger two through pipe two and pipe three for condensation and liquefaction. After liquefaction, it enters the buffer tank through pipe four and pipe five, where part of the liquid is discharged and the other part enters the first-stage dehydration tower and the second-stage dehydration tower through pipe six and pipe seven for further purification, so that the waste liquid can be purified better and the device is more complete. Attached Figure Description

[0012] Figure 1 A side view of a dual-tower concentration device provided by this utility model; Figure 2 A side view of a dual-tower concentration device provided by this utility model; Figure 3 A side view of the buffer tank of a dual-tower concentration device provided by this utility model.

[0013] Legend: 1. Base; 2. Primary dehydration tower; 3. Secondary dehydration tower; 301. Liquid pump one; 302. Discharge pipe; 4. Pipe one; 5. Liquid pump two; 6. Compressor; 7. Exhaust gas pipe one; 8. Exhaust gas pipe two; 9. Heat exchanger one; 10. Heat exchanger two; 11. Pipe two; 12. Pipe three; 13. Buffer tank; 14. Pipe four; 15. Pipe five; 16. Pipe six; 17. Pipe seven. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0015] Please see Figure 1-3 This utility model provides a technical solution: a dual-tower concentration device, comprising: a base 1, a primary dehydration tower 2 installed on the top of the base 1, a secondary dehydration tower 3 installed on the top of the base 1, a pipe 4 installed on the surface of the primary dehydration tower 2, the other end of the pipe 4 installed on the surface of the secondary dehydration tower 3, a liquid pump 5 installed on the surface of the pipe 4, a discharge pipe 302 installed on the surface of the secondary dehydration tower 3, and a liquid pump 301 installed on the surface of the discharge pipe 302.

[0016] Specifically: During operation, the device uses a primary dehydration tower 2 and a secondary dehydration tower 3 installed on top of the base 1. Waste liquid enters the primary dehydration tower 2 for purification. The primary and secondary dehydration towers 2 and 3 are connected by a pipe 4. After purification in the primary dehydration tower 2, a liquid pump 5 installed on the surface of pipe 4 is activated to allow the purified waste liquid to enter the secondary dehydration tower 3 for further purification. After purification in the secondary dehydration tower 3, a liquid pump 301 installed on the surface of the discharge pipe 302 is activated to discharge the purified waste liquid through the discharge pipe 302. This allows the device to better purify the waste liquid. The primary and secondary dehydration towers 2 and 3 are connected in series. The purification effect of the waste liquid purified by the primary dehydration tower 2 can reach 25%-35%, and then the waste liquid enters the secondary dehydration tower 3 for further purification, achieving a purification effect of 35%-50%. This allows for better purification of the waste liquid and makes the device more complete.

[0017] In one embodiment, a compressor 6 is mounted on the top of the base 1, an exhaust pipe 7 is mounted on the surface of the compressor 6, the other end of the exhaust pipe 7 is mounted on the top of the primary dehydration tower 2, an exhaust pipe 8 is mounted on the surface of the compressor 6, and the other end of the exhaust pipe 8 is mounted on the top of the secondary dehydration tower 3.

[0018] Specifically: During the operation of the device, the two ends of exhaust gas pipe 7 are respectively installed on the primary dehydration tower 2 and the compressor 6, and the two ends of exhaust gas pipe 8 are respectively installed on the secondary dehydration tower 3 and the compressor 6. The waste liquid vapor inside the primary dehydration tower 2 and the secondary dehydration tower 3 enters the interior of the compressor 6 through exhaust gas pipe 7 and exhaust gas pipe 8 for secondary heating, making the device more perfect.

[0019] In one embodiment, a heat exchanger 9 is installed on the surface of the primary dehydration tower 2, and a circulation pump is installed between the primary dehydration tower 2 and the heat exchanger 9. A heat exchanger 10 is installed on the surface of the secondary dehydration tower 3, and a circulation pump is installed between the secondary dehydration tower 3 and the heat exchanger 10. A pipe 11 is installed on the surface of the compressor 6, and the other end of the pipe 11 is installed on the surface of the heat exchanger 9. A pipe 12 is installed on the surface of the compressor 6, and the other end of the pipe 12 is installed on the surface of the heat exchanger 10.

[0020] Specifically: Heat exchangers 1-9 and 2-10 are installed on the surfaces of the primary dehydration tower 2 and the secondary dehydration tower 3. The two ends of pipe 2-11 are respectively installed on heat exchanger 1-9 and compressor 6, and the two ends of pipe 3-12 are respectively installed on heat exchanger 2-10 and compressor 6. Waste liquid vapor enters the interior of heat exchanger 1-9 through pipe 2-11 and enters the interior of heat exchanger 2-10 through pipe 3-12. Then, the waste liquid vapor condenses into liquid inside heat exchanger 1-9 and heat exchanger 2-10, making the device more complete.

[0021] In one embodiment, a buffer tank 13 is mounted on the top of the base 1, a pipe 14 is mounted on the surface of the buffer tank 13, the other end of the pipe 14 is mounted on the surface of the heat exchanger 9, a pipe 15 is mounted on the surface of the buffer tank 13, and the other end of the pipe 15 is mounted on the surface of the heat exchanger 10.

[0022] Specifically: the two ends of pipe 14 are respectively installed on buffer tank 13 and heat exchanger 9, and the two ends of pipe 15 are respectively installed on buffer tank 13 and heat exchanger 10. The liquid condensed by heat exchanger 9 and heat exchanger 10 enters the interior of buffer tank 13 through pipe 14 and pipe 15.

[0023] In one embodiment, a pipe 16 is installed on the surface of the buffer tank 13, the other end of which is installed on the surface of the primary dehydration tower 2, and a pipe 17 is installed on the surface of the buffer tank 13, the other end of which is installed on the surface of the secondary dehydration tower 3.

[0024] Specifically: Pipeline 16 is installed at both ends on buffer tank 13 and primary dehydration tower 2, and pipeline 17 is installed at both ends on buffer tank 13 and secondary dehydration tower 3. Part of the liquid entering buffer tank 13 is discharged, and the other part enters primary dehydration tower 2 and secondary dehydration tower 3 through pipelines 16 and 17 for further purification, making the device more complete.

[0025] Working Principle: During operation, the device uses a primary dehydration tower 2 and a secondary dehydration tower 3 installed on top of the base 1. Waste liquid enters the primary dehydration tower 2 for purification. The primary and secondary dehydration towers 2 and 3 are connected by pipe 4. After purification in the primary dehydration tower 2, the liquid pump 5 installed on pipe 4 is activated, allowing the purified waste liquid to enter the secondary dehydration tower 3 for further purification. After purification in the secondary dehydration tower 3, the liquid pump 301 installed on the discharge pipe 302 of the secondary dehydration tower 3 is activated, allowing the purified waste liquid to be discharged through the discharge pipe 302. This setup allows for better purification of waste liquid. The primary dehydration tower 2 and the secondary dehydration tower 3 are connected in series. Waste liquid purified by the primary dehydration tower 2 achieves a purification efficiency of 25%-35%, and then enters the secondary dehydration tower 3 for further purification, achieving an efficiency of 35%-50%. This ensures better purification of the waste liquid and makes the device more complete. During operation, waste gas pipe 1 is connected to both ends of the primary dehydration tower 2 and compressor 6, and waste gas pipe 2 is connected to both ends of the secondary dehydration tower 3 and compressor 6. Waste liquid vapor inside the primary and secondary dehydration towers 2 and 3 is released through waste gas pipe 1. 7 and exhaust gas pipe 2 enter the compressor 6 for secondary heating. Heat exchangers 1-9 and 2-10 are installed on the surfaces of the primary dehydration tower 2 and secondary dehydration tower 3, respectively. Pipe 2-11 has its two ends connected to heat exchanger 1-9 and compressor 6, respectively. Pipe 3-12 has its two ends connected to heat exchanger 2-10 and compressor 6, respectively. Waste liquid vapor enters heat exchanger 1-9 through pipe 2-11 and heat exchanger 2-10 through pipe 3-12. The waste liquid vapor condenses into liquid inside heat exchangers 1-9 and 2-10, and then its two ends are connected to buffer tank 13 and heat exchanger 1-9 through pipe 4-14. Pipeline 15 has its two ends installed on buffer tank 13 and heat exchanger 2 10, respectively. The liquid condensed by heat exchanger 1 9 and heat exchanger 2 10 enters the interior of buffer tank 13 through pipe 4 14 and pipe 5 15. Pipeline 6 has its two ends installed on buffer tank 13 and primary dehydration tower 2, respectively. Pipeline 7 has its two ends installed on buffer tank 13 and secondary dehydration tower 3, respectively. Part of the liquid entering buffer tank 13 is discharged, and the other part enters the interior of primary dehydration tower 2 and secondary dehydration tower 3 through pipe 6 16 and pipe 7 17 for further purification, so that the waste liquid can be purified better and the device can be more complete.

[0026] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A dual-tower concentration device, characterized in that, include: A base (1) is provided with a primary dehydration tower (2) installed on the top of the base (1) and a secondary dehydration tower (3) installed on the top of the base (1). A pipe (4) is installed on the surface of the primary dehydration tower (2), and the other end of the pipe (4) is installed on the surface of the secondary dehydration tower (3). A liquid pump (5) is installed on the surface of the pipe (4), and a discharge pipe (302) is installed on the surface of the secondary dehydration tower (3). A liquid pump (301) is installed on the surface of the discharge pipe (302).

2. The dual-tower concentration apparatus according to claim 1, characterized in that: A compressor (6) is installed on the top of the base (1). A first exhaust pipe (7) is installed on the surface of the compressor (6). The other end of the first exhaust pipe (7) is installed on the top of the first-stage dehydration tower (2). A second exhaust pipe (8) is installed on the surface of the compressor (6). The other end of the second exhaust pipe (8) is installed on the top of the second-stage dehydration tower (3).

3. The dual-tower concentration apparatus according to claim 2, characterized in that: The surface of the primary dehydration tower (2) is equipped with heat exchanger one (9), the surface of the secondary dehydration tower (3) is equipped with heat exchanger two (10), the surface of the compressor (6) is equipped with pipe two (11), the other end of pipe two (11) is installed on the surface of heat exchanger one (9), the surface of the compressor (6) is equipped with pipe three (12), the other end of pipe three (12) is installed on the surface of heat exchanger two (10).

4. The dual-tower concentration apparatus according to claim 1, characterized in that: A buffer tank (13) is installed on the top of the base (1), and a pipe (14) is installed on the surface of the buffer tank (13). The other end of the pipe (14) is installed on the surface of the heat exchanger (9). A pipe (15) is installed on the surface of the buffer tank (13), and the other end of the pipe (15) is installed on the surface of the heat exchanger (10).

5. A dual-tower concentration apparatus according to claim 4, characterized in that: The surface of the buffer tank (13) is fitted with a pipe six (16), the other end of which is fitted with the surface of the primary dehydration tower (2).

6. The dual-tower concentration apparatus according to claim 4, characterized in that: The buffer tank (13) is equipped with a pipe seven (17), and the other end of the pipe seven (17) is installed on the surface of the secondary dehydration tower (3).

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