Method and device for treating high-salinity wastewater by using rotary membrane evaporator

A membrane evaporator, high-salt wastewater technology, applied in chemical instruments and methods, water/sewage treatment, heating water/sewage treatment, etc., can solve problems such as blockage of the evaporator outlet, increased repair costs, and easy wear of the scraper. , to achieve the effect of convenient maintenance and replacement, reducing repair costs, and not easy to block

Pending Publication Date: 2019-07-09
SOUTHEAST UNIV +1
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The scraper is easy to wear after the evaporator runs for a period of time
[0007] 2. The bottom bearing is driven by the motor, which is easy to wear under the action of radial force, and it is inconvenient to replace the bearing inside the evaporator. If it is replaced frequently, it will affect the normal operation of production and increase the repair cost
[0008] 3. The high-salt wastewater contains a relativel...

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
  • Method and device for treating high-salinity wastewater by using rotary membrane evaporator
  • Method and device for treating high-salinity wastewater by using rotary membrane evaporator
  • Method and device for treating high-salinity wastewater by using rotary membrane evaporator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A device for treating high-salt wastewater by a rotary film evaporator, comprising a rotary film evaporator, a steam compressor 13 connected to a steam outlet 16 and a steam inlet 17 of the rotary film evaporator, and a rotary film evaporator A first steam trap 26 is arranged on the connecting pipeline of the heat exchanger 20 connected to the high-salt wastewater inlet 18 and the wastewater steam outlet 22 at the bottom of the rotary film evaporator.

[0059] The driving device of the main shaft 6 in the rotary film evaporator includes a motor 2, a reducer 3, a coupling 4, a mechanical seal 5, a bearing, a bearing seat 10, and a bottom scraper 11. The rotary film evaporator adopts a vertical evaporation method. The motor 2, the reducer 3, the coupling 4, the mechanical seal 5, the bearing and the bearing seat 10 are on a vertical line with the main shaft 6 and connected with the main shaft 6. The motor 2 is connected with the reducer 3 , the lower part of the reducer 3...

Embodiment 2

[0067] Supplement raw steam with a pressure of 0.08MPa at the steam inlet and a temperature of 102°C. After the steam is compressed by the compressor 13, the temperature increases by about 10°C to heat the evaporator. The evaporator treats 1 t / h of high-salt wastewater, and the temperature of the steam outlet 22 of the high-salt wastewater is about 106°C.

[0068] The working process of the device of the present invention is as follows:

[0069] (1) Open the valve at the supplementary steam inlet 15 to make the raw steam fill the shell of the evaporator. Turn on the steam compressor 13 to compress the raw steam and increase the steam temperature by about 10°C. The compressed steam heats the inner casing 8 . The second thermometer detects the temperature of the steam compressed by the compressor 13. If the temperature is too high or too low, the frequency of the compressor 13 is adjusted to adjust the temperature.

[0070] (2) The motor 2 is started and decelerated by the re...

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

A device for treating high-salinity wastewater by a rotary membrane evaporator comprises the rotary membrane evaporator, a steam compressor and a heat exchanger, and the evaporator adopts a vertical evaporation mode. The steam compressor compresses steam generated by a power plant boiler, and the compressed steam heats an inner shell of the evaporator. High-salinity wastewater is heated by the heat exchanger and then evenly distributed on the inner shell through a distributor to flow downwards, a magnetic scraper spreads the high-salinity wastewater flowing downwards, and salt scales left on the surface of the inner shell after the wastewater is evaporated are scraped down. A bottom scraper welded with a protective cover is arranged at the bottom of the evaporator, a main shaft drives thebottom scraper to rotate to scrape salt deposit deposited at the bottom, and a concentrated solution is discharged from a concentrated solution outlet. Wastewater steam is condensed and discharged through a drain valve. The device solves the problems that a conventional rotary film evaporator bearing is easy to abrade, difficult to replace and easy to corrode, the magnetic scraper is arranged to solve the problem that the concentration effect becomes poor due to the fact that a common scraper is easy to abrade, the bottom scraper is arranged at the bottom to prevent the concentrated solution outlet from being blocked, and an MVR technology is adopted to save more energy.

Description

technical field [0001] The invention belongs to a high-salt wastewater evaporation treatment device. Background technique [0002] With the development of my country's industrialization process, coal-fired power stations and chemical enterprises produce a large amount of high-salt wastewater. Impurities in high-salt wastewater mainly contain Ca 2+ , Mg 2+ , SO 4 2- , Cl - 、Na + etc., some also have pollutants such as chromium, cadmium, mercury, arsenic, lead, nickel, etc. This type of wastewater has poor biodegradability and contains a large amount of calcium and magnesium ions, which can easily cause equipment blockage. [0003] The widely used method of evaporating high-salt wastewater is forced circulation evaporation. In order to ensure that the pipelines of the equipment are not blocked by forced circulation, the circulation speed must be above 2.5m / s, the power of the circulation pump is large, and the power consumption is large. The rotary film evaporator use...

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
IPC IPC(8): C02F1/04C02F1/08
CPCC02F1/041C02F1/08C02F1/042C02F1/043
Inventor 葛仕福沈越蒋龙进董龙张顺周彩玲张程周尤超
Owner SOUTHEAST UNIV
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