Low-concentration DMFDMAC saline and acidic wastewater rectifying and recovering device and mechanical application method thereof

A recovery device and low-concentration technology, which is applied in the field of low-concentration DMFDMAC salt- and acid-containing wastewater rectification and recovery devices, can solve the problems of unreachable product quality, tower blockage, and inability to continue production, so as to delay start-up time and avoid blockage The effect of equipment and waste heat utilization on energy saving and consumption reduction

Pending Publication Date: 2019-06-07
河北拓康工程技术有限公司
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, when treating low-concentration DMFDMAC salt- and acid-containing wastewater, the salt in the raw solution is not treated, resulting in serious tower blockage, continuous production is not possible, the generated salt cannot be separated from the solution in a timely and effective manner, and the quality of the finished product cannot reach above indicators

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low-concentration DMFDMAC saline and acidic wastewater rectifying and recovering device and mechanical application method thereof
  • Low-concentration DMFDMAC saline and acidic wastewater rectifying and recovering device and mechanical application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see figure 1 , in Example 1 of the present invention, a low-concentration DMFDMAC salt-and-acid wastewater rectification recovery device includes a desalination system 1, and the outlet of the desalination system 1 is connected to a liquid storage tank 2, and the liquid storage tank 2 is connected on the primary dehydration tower 3, and the outlet of the primary dehydration tower 3 is connected on the demister device, and the outlet of the demister device is connected on the secondary dehydration tower 4, and the two The outlet of stage dehydration tower 4 is connected on the inlet of rectification tower 5, and the outlet of rectification tower 5 is connected on the inlet of deacidification tower 6, and the side wall of described deacidification tower 6 is provided with finished product Outlet, the finished product outlet is connected to the refined product tank 8, and the outlet end of the refined product tank 8 is respectively connected to the finished product dischar...

Embodiment 2

[0038]In order to process the waste gas in the rectification tower 5, the following settings are made, the top of the rectification tower 5 is connected to the feed inlet of the C tower top liquid storage tank 20 through the B tower top condenser 26, and the C tower top storage tank The outlet of the liquid tank 20 is connected to the rectification tower 5, and the exhaust port on the liquid storage tank 20 at the top of the C tower is connected to the waste gas adsorption tower 7 through a vacuum pump. In addition, the outlet of the liquid storage tank 20 at the top of the C tower is also connected to the liquid storage tank 13 at the top of the B tower.

[0039] The water evaporated from the rectification tower 5 is preheated by the water heater, and then enters the deamination tower 16 to heat and remove the DMA component, and neutralize with dilute acid to crystallize the DMA into salt.

[0040] The rectification tower 5 is provided with a rectification tower reboiler 24 f...

Embodiment 3

[0051] Based on the above-mentioned embodiments, the embodiments of the present invention also disclose a method for rectification and recovery of low-concentration DMFDMAC salt-containing acid-containing wastewater. Specifically, it includes the following steps:

[0052] S1: The low-concentration DMFDMAC salty and acidic waste water is desalinated through the desalination system in turn. The first dehydration tower 3 and the second dehydration tower 4 perform two-stage dehydration, and then pass through the rectification tower 5 for negative pressure rectification, and then enter the Negative pressure deacidification treatment is carried out in the deacidification tower 6;

[0053] S2: After the above treatment is completed, the deacidification tower 6 is discharged from the measuring line, and the discharge of the measuring line is also provided with an upper and lower reflux process;

[0054] S3: The water evaporated from the rectifying tower 5 is preheated by the water inl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a low-concentration DMFDMAC saline and acidic wastewater rectifying and recovering device and relates to the technical field of environment friendliness. The low-concentrationDMFDMAC saline and acidic wastewater rectifying and recovering device comprises a desalting system; a discharging hole of the desalting system is connected with a liquid storage tank; a drain outlet of the liquid storage tank is connected to a first-stage dehydration tower; an outlet of the first-stage dehydration tower is connected to a foam remover; an outlet of the foam remover is connected toa second-stage dehydration tower; a discharging hole of the second-stage dehydration tower is connected to a feeding hole of a rectifying tower; a discharging hole of the rectifying tower is connectedto a feeding hole of a deacidification tower; the side wall of the deacidification tower is provided with a finished product discharging hole connected to a refined finished product tank; and the outlet end of the refined finished product tank is respectively connected to the finished product discharging end and a return opening in the deacidification tower by a tee. The complete equipment is stable in operation.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a low-concentration DMFDMAC salt- and acid-containing wastewater rectification recovery device and a mechanical application method. Background technique [0002] With the development and progress of the chemical industry, people are exploring more and more in the chemical field. Along with the synthesis of various new chemical materials, various high-concentration industrial wastewater is also produced. If these wastewaters are directly discharged into rivers, lakes and seas without treatment, they will cause serious environmental pollution and ecological damage, and pose a serious threat to human health. N,N-dimethylformamide (DMF) and N,N-dimethylacetamide (DMAC) are important chemical raw materials and excellent solvents, mainly used in polyurethane, chemical fiber, medicine, pesticide, dye, electronics and other industries. Since the boiling points of DMF ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C07C209/86C07C211/04C02F101/38
CPCY02A20/124
Inventor 李银川
Owner 河北拓康工程技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap