CN211595333U

CN211595333U - System for handle high salt waste water that contains methyl alcohol

Info

Publication number: CN211595333U
Application number: CN201922143295.9U
Authority: CN
Inventors: 韩全; 张恒
Original assignee: Guangdong Yeanovo Environmental Protection Co ltd
Current assignee: Guangdong Shangchen Environmental Technology Co ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-09-29
Anticipated expiration: 2029-12-03

Abstract

The utility model discloses a system for handle high salt waste water that contains methyl alcohol, include one-level distillation system, ultrafiltration system, receive filtration system and MVR system that connect gradually through the pipeline. The high-salinity wastewater treatment system suitable for containing methanol provided by the utility model can realize zero discharge of high-salinity wastewater containing organic matters, the total salt concentration of the produced water treated by the system is less than 10mg/L, the COD is less than 5mg/L, and simultaneously the crystallized salt with the water content of 88-94% can be obtained, and the recovery rate of methanol reaches more than 95%; simultaneously the utility model provides a processing system area is little, and the energy consumption is low, and can be used to the treatment of the high salt waste water that the composition is complicated, need not to add any medicament, and the running cost is low, compares with prior art and has made apparent progress.

Description

System for handle high salt waste water that contains methyl alcohol

Technical Field

The utility model belongs to the technical field of the pollutant is handled, concretely relates to system for handle high salt waste water that contains methyl alcohol.

Background

The high-salinity wastewater refers to wastewater with salinity concentration more than or equal to 1 percent, has certain toxic action on the environment, and is mainly from high-salinity wastewater discharged or deeply treated by production enterprises such as power plants, chemical engineering and the like. It mainly has the following characteristics: first, the total dissolved solids content in the wastewater is high; secondly, the concentration of ions which are easy to generate scale in the wastewater is high; thirdly, the alkalinity in the wastewater is high.

At present, the treatment method of the high-salinity wastewater is mainly an evaporation method, and the method can realize the separation of salt and water in the high-salinity wastewater and recycle the high-purity distilled water. However, the early single-effect evaporation technology not only has high energy consumption, but also has large occupied area of equipment. Therefore, this method is gradually replaced by MVR multi-effect evaporation technology. Compared with single-effect evaporation, the energy consumption of the technology is reduced to some extent, and the concentration of the conventional high-salinity wastewater can be improved to more than 30% from 1% -2% by matching with the conventional membrane concentration multiplication technology, so that the water amount of single evaporation can be obviously reduced, and the evaporation energy consumption is further reduced. However, at present, most of the membrane concentration-MVR evaporation devices have large floor space and are difficult to treat high-salinity wastewater (mainly high-salinity wastewater containing organic matters) with complex components, although the energy consumption is reduced and the operation cost is saved.

SUMMERY OF THE UTILITY MODEL

Based on this, to above-mentioned technical problem, the utility model aims at providing a system of handling contain methyl alcohol high salt waste water.

In order to realize the purpose of the utility model, the utility model discloses a following solution: a system for treating high-salt wastewater containing methanol comprises a primary distillation system, an ultrafiltration system, a nanofiltration system and an MVR system which are sequentially connected through pipelines.

The utility model discloses well one-level distillation system is conventional sewage treatment distillation system, and this system's effect is: through the evaporation effect, evaporate most methyl alcohol from the raw water, realize the separation with the raw water to realize the preliminary recycle of methyl alcohol in the waste water.

The utility model discloses ultrafiltration system is conventional sewage treatment ultrafiltration system, and the material of the used milipore filter of this system is PVDF, particulate matter, macromolecular substance and the separation of micromolecular substance in the mainly used aquatic. Preferably, the ultrafiltration system is connected with the water outlet of the primary distillation system through a pipeline.

Preferably, the nanofiltration system is connected with a water production tank of the ultrafiltration system through a pipeline. Nanofiltration system is conventional sewage treatment nanofiltration system, and used milipore filter material is PVC, the separation of mainly used aquatic univalent ion and non-univalent ion. Because the distillation system and the ultrafiltration system at the front section can not completely separate the methanol from the water, the nanofiltration system can separate single salt and methanol, the principle of the nanofiltration system is the same as that of nanofiltration salt separation, and different substances are separated by utilizing the selectivity of a membrane material.

Preferably, the MVR system is connected with a concentrated water tank of the nanofiltration system through a pipeline. MVR system is conventional sewage treatment MVR system, and the dense water (being high salt waste water) after mainly used handles to receive and strain, and its purpose is through MVR evaporation, separates the water of the salinity in the waste water, realizes the recovery of resource and recycles.

Preferably, the water production tank of the nanofiltration system is connected with a secondary distillation system. The system is a conventional sewage treatment distillation system, is mainly used for treating water (namely methanol-containing wastewater) produced after nanofiltration, has the same purpose as primary distillation, and is used for separating methanol from water through evaporation so as to realize the recycling of the methanol.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) the utility model provides a high salt effluent disposal system suitable for contain methyl alcohol can realize the zero release that contains organic matter high salt waste water, through the utility model discloses its total salt concentration of product water after the system treatment < 10mg/L, COD < 5mg/L, and can obtain the crystal salt that the moisture content is 88-94% simultaneously, the methyl alcohol rate of recovery reaches more than 95%.

2) The utility model provides a processing system area is little, and the energy consumption is low, and can be used to the treatment of the high salt waste water that the composition is complicated, need not to add any medicament, and the running cost is low.

Drawings

FIG. 1 is a schematic diagram of a processing system according to the present invention;

FIG. 2 is a schematic view of the process flow of the treatment method of the present invention.

In fig. 1, a primary distillation system 1; an ultrafiltration system 2; a nanofiltration system 3; an MVR system 4; a secondary distillation system 5.

Detailed Description

The above-described aspects of the present invention will be described in further detail below with reference to specific embodiments of the present invention. It should not be understood that the scope of the above-described subject matter of the present invention is limited to the following examples.

In the examples, the experimental methods used were all conventional ones unless otherwise specified, and the materials, reagents and the like used were all commercially available without otherwise specified.

Embodiment one, contain methyl alcohol high salt effluent disposal system

As shown in figure 1, the utility model discloses contain methyl alcohol high salt effluent disposal system includes: the system comprises a primary distillation system 1, an ultrafiltration system 2 connected with a water outlet of the primary distillation system, a nanofiltration system 3 connected with a water production tank of the ultrafiltration system, and an MVR system 4 connected with a concentrated water tank of the nanofiltration system. The nanofiltration water production tank of the nanofiltration system is connected with a secondary distillation system 5 for methanol recovery. All the monomer systems are connected by pipelines.

Wherein the primary distillation system is a conventional sewage treatment system, and the system has the following functions: through the evaporation effect, evaporate most methyl alcohol from the raw water, realize the separation with the raw water to realize the preliminary recycle of methyl alcohol in the waste water.

An ultrafiltration system: ultrafiltration system is conventional sewage treatment ultrafiltration system, and used milipore filter material is PVDF, particulate matter, macromolecular substance and the separation of micromolecular substance in the mainly used aquatic.

A nanofiltration system: nanofiltration system is conventional sewage treatment nanofiltration system, and the used milipore filter material of this system is PVC, the separation of mainly used aquatic univalent ion and non-univalent ion. In this embodiment, since the distillation system and the ultrafiltration system in the previous stage do not completely separate methanol from water, the nanofiltration system can separate the methanol from the salt alone.

Small MVR system: MVR system is conventional sewage treatment MVR system, and the dense water (being high salt waste water) after mainly used handles to receive and strain, and its purpose is through MVR evaporation, separates the water of the salinity in the waste water, realizes the recovery of resource and recycles.

A secondary distillation system: the system has the same composition as the primary distillation, is mainly used for treating the produced water (namely the methanol-containing wastewater) after nanofiltration, and separates methanol from water through evaporation so as to realize the recycling of the methanol.

Example II method for treating high-salinity wastewater containing methanol by adopting treatment system

The process flow schematic diagram is shown in figure 2, wherein the water quality of the high-salinity wastewater containing methanol is characterized in that: the total salt concentration is 12000mg/L, the COD is 10000mg/L, and the treatment steps are as follows:

step 1) primary distillation: the high-salinity wastewater containing methanol enters a primary distillation system for distillation treatment, and part of methanol in the wastewater is removed to obtain primary distilled water; wherein the distillation temperature is 75 ℃, the distillation time is 120min, and the total salt concentration of the obtained distilled produced water is 12000mg/L and COD is 40 mg/L;

step 2) ultrafiltration: ultrafiltering the primary distilled water through an ultrafiltration system to remove particulate matters to obtain ultrafiltered water; wherein the ultrafiltration time is 35 min;

step 3), nanofiltration: performing nanofiltration treatment on the ultrafiltration water product through a nanofiltration system, and separating inorganic salt and residual methanol to obtain nanofiltration water product with higher concentration and nanofiltration concentrated water, wherein the nanofiltration time is 50 min;

step 4), MVR evaporation: introducing the nanofiltration concentrated water into a small MVR system for evaporation for 1.5h to obtain condensed water with the total salt concentration less than 10mg/L and COD less than 5mg/L and crystallized salt with the water content of 88-94%;

step 5) secondary distillation treatment: and (3) carrying out distillation treatment on the nanofiltration water product obtained in the step 3) by using a secondary distillation system, further recovering methanol, wherein the distillation temperature is 75 ℃, the distillation time is 100min, after the distillation is finished, the COD of the secondary distillation water product is 10-15 mg/L, and the recovery rate of the methanol is more than 95%.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A system for treating high-salt wastewater containing methanol is characterized by comprising a primary distillation system, an ultrafiltration system, a nanofiltration system and an MVR system which are sequentially connected through pipelines.

2. The system for treating high-salinity wastewater containing methanol according to claim 1, characterized in that the ultrafiltration system is connected with the water outlet of the primary distillation system through a pipeline.

3. The system for treating high-salinity wastewater containing methanol according to claim 1, characterized in that the nanofiltration system is connected with the water production tank of the ultrafiltration system by a pipeline.

4. The system for treating high-salt wastewater containing methanol according to claim 1, wherein the MVR system is connected with a concentrate tank of the nanofiltration system through a pipeline.

5. The system for treating high-salinity wastewater containing methanol according to claim 1, characterized in that the water production tank of the nanofiltration system is connected with a secondary distillation system.