CN214571625U

CN214571625U - DMF recovery system

Info

Publication number: CN214571625U
Application number: CN202120701263.0U
Authority: CN
Inventors: 李剑峰; 张景聚; 张建峰; 陈子南
Original assignee: Zhejiang Shaangu Energy Development Co ltd
Current assignee: Zhejiang Shaangu Energy Development Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-11-02
Anticipated expiration: 2031-04-07

Abstract

The utility model discloses a DMF recovery system, include: the upper end of the first solid-liquid separator is provided with a first gas outlet, the lower end of the first solid-liquid separator is provided with a first liquid outlet and a first discharge hole, and the first liquid outlet is connected with the feed inlet of the first solid-liquid separator through a first pump and a first heat exchanger in sequence; the lower end of the second solid-liquid separator is provided with a second liquid outlet and a second discharge hole, the upper end of the second solid-liquid separator is provided with a second feeding hole, a second liquid inlet and a second gas outlet, the second liquid outlet is connected with the second liquid inlet through a second pump and a second heat exchanger, and the first discharge hole is connected with the second feeding hole; the gas inlet of the first distillation tower is connected with the gas outlet of the first distillation tower through a first pipeline; through the utility model discloses, can reduce clearance cycle and clearance cost to heat exchanger.

Description

DMF recovery system

Technical Field

The utility model belongs to the chemical industry field, in particular to DMF recovery system.

Background

In the chemical industry field, retrieve DMF in directly letting in the distillation column with waste water mostly, through this kind of recovery mode, can adhere to the unable material that evaporates of a large amount of cloth hair, residue etc. on the heat exchanger's that matches with the distillation column inner wall, lead to this heat exchanger's effective work pipe diameter to reduce and the pan feeding volume in the unit interval reduces from this, work efficiency also reduces thereupon, can produce adverse effect to enterprise manufacturing cost finally.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a DMF recovery system to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a DMF recovery system, comprising:

the upper end of the first solid-liquid separator is provided with a first gas outlet, the lower end of the first solid-liquid separator is provided with a first liquid outlet and a first discharge hole, and the first liquid outlet is connected with the feed inlet of the first solid-liquid separator through a first pump and a first heat exchanger in sequence;

the lower end of the second solid-liquid separator is provided with a second liquid outlet and a second discharge hole, the upper end of the second solid-liquid separator is provided with a second feeding hole, a second liquid inlet and a second gas outlet, the second liquid outlet is connected with the second liquid inlet through a second pump and a second heat exchanger, and the first discharge hole is connected with the second feeding hole;

the gas inlet of the first distillation tower is connected with the gas outlet of the first distillation tower through a first pipeline, and the gas outlet of the second distillation tower is connected with the first pipeline through a third pipeline and communicated with the first pipeline; the lower end of the first distillation tower is provided with a third liquid outlet, and the third liquid outlet is connected with a liquid inlet of the first distillation tower through a third pump and a third heat exchanger in sequence.

Still include No. two distillation columns, the gas inlet of No. two distillation columns links to each other with the gas outlet of a distillation column, No. two distillation column lower extremes is equipped with No. four liquid outlet, No. four liquid outlet loops through No. four pumps, No. four heat exchanger and links to each other with the inlet of No. two distillation columns.

Still include No. three distillation columns, the gas inlet of No. three distillation columns links to each other with the gas outlet of No. two distillation columns, No. three distillation column lower extreme is equipped with No. five liquid outlet, No. five liquid outlet loops through No. five pumps, No. five heat exchanger and links to each other with the inlet of No. three distillation columns.

No. two discharge gates are located No. two solid-liquid separator lower extremes, the discharge gate passes through the pipeline and links to each other with the agitator tank, the agitator tank boil-off gas export through pipeline two with pipeline one link up mutually.

And a residue outlet is arranged below the stirring tank, and a receiving barrel is arranged below the residue outlet.

And slag discharge ports are arranged below the first distillation tower, the second distillation tower and the third distillation tower.

Compared with the prior art, the utility model has the advantages that,

through the utility model discloses, can reduce clearance cycle and the clearance cost to heat exchanger (No. three heat exchangers, No. four heat exchangers, No. five heat exchangers).

Drawings

Fig. 1 is a schematic view of the present invention.

In the figure: 1. a stirring tank; 2. a first pump; 3. a first heat exchanger; 4. a first solid-liquid separator; 5. a first pipeline; 6. a second solid-liquid separator; 7. A second pump; 8. a second heat exchanger; 9. a first distillation column; 10. a third pump; 11. a third heat exchanger; 12. a second distillation column; 13. a pump No. four; 14. a heat exchanger number four; 15. a third distillation column; 16. a fifth pump; 17. a fifth heat exchanger; 18. and a third pipeline.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown, a DMF recovery system, comprising:

the gas-liquid separator 4 is arranged at the upper end of the solid-liquid separator 4, the liquid outlet and the discharge hole are arranged at the lower end of the solid-liquid separator 4, and the liquid outlet is connected with the feed hole of the solid-liquid separator 4 sequentially through the pump 2 and the heat exchanger 3;

the second solid-liquid separator 6 is provided with a second liquid outlet and a second discharge hole at the lower end of the second solid-liquid separator 6, a second feeding hole, a second liquid inlet and a second gas outlet are formed at the upper end of the second solid-liquid separator 6, the second liquid outlet is connected with the second liquid inlet through a second pump 7 and a second heat exchanger 8, and the first discharge hole is connected with the second feeding hole;

a first distillation tower 9, wherein a gas inlet of the first distillation tower 9 is connected with a first gas outlet through a first pipeline 5, and a second gas outlet is connected with and communicated with a first pipeline 5 through a third pipeline 18; the lower end of the first distillation tower 9 is provided with a third liquid outlet, and the third liquid outlet is connected with a liquid inlet of the first distillation tower 9 sequentially through a third pump 10 and a third heat exchanger 11.

Still include No. two distillation columns 12, the gas inlet of No. two distillation columns 12 links to each other with the gas outlet of a distillation column 9, No. two distillation column 12 lower extremes is equipped with No. four liquid outlet, No. four liquid outlet loops through No. four pump 13, No. four heat exchanger 14 and links to each other with the inlet of No. two distillation columns 12.

Still include distillation column No. three 15, the gas inlet of distillation column No. three 15 links to each other with the gas outlet of distillation column No. two 12, distillation column No. three 15 lower extremes is equipped with No. five liquid outlet, No. five liquid outlet loops through No. five pump 16, No. five heat exchanger 17 and links to each other with the inlet of distillation column No. three 15.

No. two discharge gates are arranged at 6 lower ends of No. two solid-liquid separators, the discharge gates are connected with a stirring tank 1 through pipelines, and an evaporation gas outlet of the stirring tank 1 is communicated with a pipeline I5 through a pipeline II.

And a residue outlet is arranged below the stirring tank 1, and a receiving barrel is arranged below the residue outlet.

And slag discharge ports are arranged below the first distillation tower 9, the second distillation tower 12 and the third distillation tower 15.

In actual production, each distillation tower (a first distillation tower 9, a second distillation tower 12 and a third distillation tower 15) is connected with a plurality of heat exchangers, the conventional method is that wastewater is directly introduced into the first distillation tower 9, treated by the first distillation tower 9 and then treated by the second distillation tower 12 and the third distillation tower 15, the total amount of the heat exchangers arranged on the distillation towers (the first distillation tower 9, the second distillation tower 12 and the third distillation tower 15) is large, the heat exchangers are basically required to be cleaned once about 1 month, the cleaning cost is generally hundreds of thousands, and the cost is high;

the utility model discloses when using, a less heat exchanger 4, No. two heat exchangers 8 of quantity are dirty more easily, still about a month to its clearance once, and the clearance is once just enough about the great No. three heat exchangers 11 of total amount, No. four heat exchangers 14, No. five heat exchangers 17 four five months basically, consequently, can reduce clearance expense and enterprise's manufacturing cost by a wide margin.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A DMF recovery system, comprising:

2. The DMF recovery system of claim 1 further comprising a second distillation column, wherein the gas inlet of the second distillation column is connected with the gas outlet of the first distillation column, the lower end of the second distillation column is provided with a fourth liquid outlet, and the fourth liquid outlet is connected with the liquid inlet of the second distillation column sequentially through a fourth pump and a fourth heat exchanger.

3. The DMF recovery system of claim 2 further comprising a third distillation column, wherein the gas inlet of the third distillation column is connected with the gas outlet of the second distillation column, the lower end of the third distillation column is provided with a fifth liquid outlet, and the fifth liquid outlet is connected with the liquid inlet of the third distillation column sequentially through a fifth pump and a fifth heat exchanger.

4. The DMF recovery system of claim 3 wherein the second discharge port is arranged at the lower end of the second solid-liquid separator, the discharge port is connected with a stirring tank through a pipeline, and an evaporation gas outlet of the stirring tank is communicated with the pipeline I through a pipeline II.

5. The DMF recovery system of claim 4 wherein a residue outlet is arranged below the stirring tank, and a receiving barrel is arranged below the residue outlet.

6. The DMF recovery system of claim 5 wherein a deslagging port is provided below each of the first distillation column, the second distillation column and the third distillation column.