DMF Solvent Recovery Plant
Process brief introduction
After the DMF solvent from the production process is preheated, it enters the dehydrating column. The dehydrating column is provided with heat source by the steam on the top of the rectification column. The DMF in the column tank is concentrated and pumped into the evaporation tank by the discharge pump. After the waste solvent in the evaporation tank is heated by the feed heater, the vapor phase enters the rectification column for rectification, and part of the water is recovered and returned to the evaporation tank with DMF for re-evaporation. DMF is extracted from distillation column and processed in deacidification column. The DMF produced from the side line of the deacidification column is cooled and fed into the DMF finished product tank.
After cooling, the water at the top of the column enters the sewage treatment system or enters the water treatment system and returns to the production line for use.
The device is made of thermal oil as a heat source, and circulating water as a cold source of the recovery device. The circulating water is supplied by the circulating pump, and returns to the circulating pool after heat exchange, and is cooled by the cooling tower.
Technical Data
Processing capacity from 0.5-30T/H on base of different DMF content
Recovery rate: above 99% (based on the flowrate entering and discharging from the system)
| Item | Technical Data |
| Water | ≤200ppm |
| FA | ≤25ppm |
| DMA | ≤15ppm |
| Electrical conductivity | ≤2.5µs/cm |
| Rate of recovery | ≥99% |
Equipment Character
Rectifying system of DMF solvent
The rectifying system adopt vacuum concentration column and rectifying column, the main process is first concentration column(T101), second concentration column (T102) and rectifying column(T103), the systemic energy conservation is obvious. The system is one of the latest process currently. There is filler structure to reduce the pressure drop and operation temperature.
Vaporization system
Vertical evaporator and forced circulation is adopted in the vaporization system, the system have the advantage of easy cleaning, easy operation and long continual running time.
DMF De-acidification System
The DMF deacidification system adopt gaseous phase discharging, which solved the difficulties of long process and high disintegrate of DMF for liquid phase, meanwhile reduce heat consumption of 300,000kcal. it is low energy consumption and high recovery rate.
Residue Vaporization System
The system is specially designed for treat the liquid residue. The liquid residue is directly discharged to the residue dryer from the system, after drying, and then discharge, which can max. recover the DMF in the residue. It improves the DMF recovery rate and meanwhile reduce the pollution.
Related products
-
Toluene Recovery Plant
Equipment Description The toluene recovery plant in the light of the super fiber plant extract section, innovate the single effect evaporation for double-effect evaporation process, to reduce energy consumption by 40%, combined with falling film evaporation and the residue processing continuous operation, reducing the polyethylene in the residual toluene, improve the recovery rate of toluene. Toluene waste treatment capacity is 12~ 25t / h Toluene recovery rate ≥99% ...
-
Residue Dryer
Equipment Description The residue dryer pioneered the development and promotion can make the waste residue produced by DMF recovery device completely dry, and form slag formation. To improve the DMF recovery rate, reduce the pollution of the environment, reducing the labor intensity of workers, too. The dryer has been in a number of enterprises to obtain good results. Equipment Picture
-
DMF Waste Gas Recovery Plant
Equipment Description In the light of the dry & wet production lines of the synthetic leather enterprises emitted DMF exhaust gas, the DMF waste gas recovery plant can make the exhaust reaches the requirements of environmental protection, and recycling the DMF components, using high performance fillers make DMF recovery efficiency higher. The DMF recovery can reach above 95%. The device adopts the cleaning technology of spray adsorbent. DMF is easy to dissolve in...
-
DMAC Solvent Recovery Plant
Equipment Description This DMAC recovery system uses five-stage vacuum dehydration and one-stage high vacuum rectification to separate DMAC from water, and combines with vacuum deacidification column to obtain DMAC products with excellent indexes. Combined with evaporation filtration and residual liquid evaporation system, the impurities mixed in DMAC waste liquid can form solid residue, improve the recovery rate and reduce pollution. This device adopts the main proc...
-
DMA Treatment Plant
Main Features During the DMF rectifying and recovery process, due to the high temperature and Hydrolysis, parts of the DMF will be disintergrated to FA and DMA. The DMA will cause odor pollution, and bring serious impact for the operation environment and the enterprise. To follow the idea of Environment protection, the DMA waste should be incinerated, and discharged without pollution. We have developed the DMA wastewater purification process, can get about 40% indus...
-
DCS Control System
System Description DMF recovery process is a typical chemical distillation process, characterized by a large degree of correlation between process parameters and a high requirement for recovery indicators. From the current situation, the conventional instrument system is difficult to achieve real-time and effective monitoring of the process, so the control is often unstable and the composition exceeds the standard, which affects the production efficiency of enterpri...