A device for concentrating and crystallizing high-temperature salty wastewater and its application

A concentrating device and salty wastewater technology, which is applied in water/sewage treatment, water treatment parameter control, water/sewage multi-stage treatment, etc., can solve the problems of low automation degree of screen filtration, increased investment cost, and large manpower consumption. , to achieve the effect of reducing energy consumption, reducing manpower input, and reducing usage

Active Publication Date: 2021-10-29
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, centrifugation requires additional equipment such as centrifuges, which increases investment costs
However, the degree of automation of screen filtration is low and requires a lot of manpower.
In addition, neither of these two methods can quickly separate the generated salt from the system, which easily causes the problem of secondary dissolution

Method used

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  • A device for concentrating and crystallizing high-temperature salty wastewater and its application
  • A device for concentrating and crystallizing high-temperature salty wastewater and its application
  • A device for concentrating and crystallizing high-temperature salty wastewater and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: as figure 1 , 2 The shown high-temperature saline wastewater concentration and crystallization device includes a first concentration device 1 for the first concentration and crystallization, a second concentration device 2 for the second concentration, and a discharge device 3 for discharging , and a cooling device 4 for providing cooling for the first concentration device 1; the first concentration device 1 uses a flash tank, and the side wall of the first concentration device 1 is sequentially provided with a first feed port from top to bottom and the second feed port; the first feed port introduces the high-temperature saline waste water into the first concentration device 1 through the first decompression pump; the second feed port discharges the high temperature from the second concentration device 2 through the second decompression pump The concentrated brine is introduced into the first concentrator 1; the first concentrator 1 is provided with a de...

Embodiment 2

[0033] Embodiment 2: Different from Embodiment 1: as figure 2 As shown, a high-temperature salty wastewater concentration and crystallization device also includes a first compression device 5, and the first compression device 5 is used to recycle the vaporized steam inside the first concentration device 1 to heat energy; the first compression device 5 is specifically Roots blower is adopted; the second concentrating device 2 adopts a low-temperature salt steaming device, and a low-temperature steaming salt pretreatment device 21 is arranged at the connection between the feed port of the second concentrating device 2 and the lower end of the discharge pipeline 31; the low-temperature steaming salt pretreatment The device 21 includes a casing 211, a U-shaped flow pipe 212 and a steam heating pipe 213. The U-shaped flow pipe 212 is arranged inside the casing 211, and the steam heating pipe 213 is wound and arranged on the U-shaped flow pipe 212; the U-shaped flow pipe 212 The wa...

Embodiment 3

[0037] Example 3: The difference from Example 1 is that the heat and water required for the pretreatment process of high-salt and high-COD chemical hazardous waste by the hydrothermolysis method are provided by the first concentration device; The treatment process requires heat and water, so the vaporized steam inside the first concentration device is directly passed to the pretreatment system, which can make full use of heat and water and save energy.

[0038] When in use, the high-temperature saline wastewater produced by hydrothermal treatment of high-salt, high-COD chemical hazardous waste enters the first concentration device 1 through the first feed port, and then the water is quickly separated, and the separated steam is directly passed through the hydrothermal method. In the pretreatment system for treating high-salt and high-COD chemical hazardous waste; in addition, the concentrated wastewater is cooled at the bottom of the first concentration device 1. According to t...

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PUM

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Abstract

The invention discloses a high-temperature salty wastewater concentration and crystallization device and its application. The device includes a first concentration device for the first concentration and crystallization, a second concentration device for the second concentration, and a discharge discharge device for discharging A material device, and a cooling device for providing cooling for the first concentration device; the first concentration device uses a flash tank, and the second concentration device uses a low-temperature salt distillation device. The invention reduces the number of solid-liquid separation devices, thereby reducing equipment investment costs and energy consumption, and at the same time has a high degree of automation and reduces manpower input. In addition, it also has the advantage of being able to quickly separate the system to generate salt, which effectively avoids the problem of secondary dissolution of salt; the combination of flash desalination technology and low-temperature salt evaporation technology can make full use of the low-grade heat energy entrained in high-temperature saline wastewater, Reduced energy consumption.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a device for concentrating and crystallizing high-temperature salty wastewater and its application. Background technique [0002] With the economic growth and the continuous expansion of industrial scale, the industrial water consumption and the resulting waste water volume are increasing day by day. This not only exacerbates the shortage of water resources in our country, but also has extremely bad effects on the living environment of human beings. Especially for high-temperature saline wastewater from a wide range of sources, the performance is more prominent. The direct discharge of this kind of wastewater will cause problems such as plant death and soil compaction, aggravate land desertification, and damage regional ecosystems. At the same time, it will also cause a great waste of salt resources and energy. Therefore, there is an urgent need to find an appropr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10
CPCC02F1/001C02F1/041C02F1/043C02F1/048C02F1/06C02F2209/08C02F2301/046C02F2303/14
Inventor 吕路王林平张炜铭徐敬生潘丙才黄前霖
Owner NANJING UNIV
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