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Drying system and process for high salinity wastewater

A high-salt waste water technology, applied in general water supply saving, evaporation, spray evaporation, etc., can solve problems affecting equipment operation safety, affecting service life, pipeline wear, etc., to avoid ash accumulation, prolong service life, avoid sticky effect

Pending Publication Date: 2018-06-19
华电水务工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The structure of the current evaporation and drying system for high-salt wastewater is relatively complicated, and the high-temperature flue gas after denitrification by the boiler is directly used as a heating source to heat and dry the wastewater. Since this high-temperature flue gas contains about 40g / m 3 During the operation, it is easy to cause the accumulation of ash on the pipeline and the equipment body, and the mixture of ash and salt will cause wear to the pipeline and affect the service life
The mixed structure formed by ash and salt drying will stick to the wall of the drying device, and the long-term accumulation will seriously affect the safety of equipment operation

Method used

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  • Drying system and process for high salinity wastewater
  • Drying system and process for high salinity wastewater
  • Drying system and process for high salinity wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 of the present invention: as Figure 1 ~ Figure 3 As shown, a high-salt wastewater evaporation system includes a raw material box 1, a lifting pump 2, a drying device 3, an air preheater 4 and a cyclone separator 5, wherein the raw material box 1, lifting pump 2, drying device 3 and the cyclone separator 5 are connected in sequence through pipelines, and the air preheater 4 is also connected with a drying device 3 through pipelines. The drying device 3 adopts the centrifugal spray method, which can atomize the high-salt wastewater into very fine droplets with a diameter of 10-200um, thereby increasing the specific surface area of ​​the concentrated brine droplets and greatly shortening the concentration of the high-salt wastewater. The drying time of salt wastewater simplifies the process flow, making the dried miscellaneous salt into powdery loose aggregates, which is easy to fall off and discharge. The high-salt waste water evaporation system also includ...

Embodiment 2

[0030] Embodiment 2: as Figure 1 ~ Figure 3 As shown, a kind of evaporation system of highly saline waste water comprises raw material box 1, lift pump 2, drying device 3, air preheater 4, cyclone separator 5, bag filter 6 and blower fan 7, wherein said raw material box 1. Lifting pump 2, drying device 3, cyclone separator 5, bag filter 6 and fan 7 are connected sequentially through pipelines, and the air preheater 4 is also connected with drying device 3 through pipelines, and the fan 7 is also connected through pipelines The pipeline is connected with an air preheater 4 . The drying device 3 adopts the centrifugal spray method, which can atomize the high-salt wastewater into very fine droplets with a diameter of 10-200um, thereby increasing the specific surface area of ​​the concentrated brine droplets and greatly shortening the concentration of high-salt wastewater. The drying time of salt wastewater simplifies the process flow, making the dried miscellaneous salt into po...

Embodiment 3

[0031] Embodiment 3: as Figure 1 ~ Figure 3 As shown, a kind of evaporation system of highly saline waste water comprises raw material box 1, lift pump 2, drying device 3, air preheater 4, cyclone separator 5, bag filter 6 and blower fan 7, wherein said raw material box 1. Lifting pump 2, drying device 3, cyclone separator 5, bag filter 6 and fan 7 are connected sequentially through pipelines, and the air preheater 4 is also connected with drying device 3 through pipelines, and the fan 7 is also connected through pipelines The pipeline is connected with an air preheater 4 . Drying device 3 comprises multilayer gas distributor 301 and atomizer 302, and described gas distributor 301 and atomizer 302 are all arranged on the top of drying device 3; Wherein air preheater 4 is connected to gas distributor 301 through pipeline , the lift pump 2 is connected to the atomizer 302 via a pipeline. Specifically, the gas distributor 301 includes a hot air channel 3011, an insulating cone...

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Abstract

Belonging to the technical field of power plant high salinity wastewater treatment, the invention discloses a treatment device for high salinity wastewater, especially to a drying system and process for high salinity wastewater. The drying system for high salinity wastewater consists of a raw material box (1), a lifting pump (2), a drying device (3), an air preheater (4) and a cyclone separator (5), wherein the raw material box (1), the lifting pump (2), the drying device (3) and the cyclone separator (5) are connected by a pipeline in order, and the air preheater (4) is also connected to thedrying device (3) through a pipeline. The system has a simple structure, the high temperature flue gas generated by a boiler denitration system is utilized as the heat source of the air preheater (4)to heat air, the air is free of high temperature flue gas ash, and ash accumulation in pipelines can be effectively avoided, therefore, the airflow in the pipeline has a low solid content, unnecessarywear can be avoided and the service life is prolonged. The drying process using the system can realize drying of high salinity wastewater, and can extract miscellaneous salt from the wastewater moreconveniently.

Description

technical field [0001] The invention relates to a treatment device for high-salt wastewater, in particular to an evaporation system and process for high-salt wastewater, belonging to the technical field of high-salt wastewater treatment in power plants. Background technique [0002] The structure of the current evaporation and drying system for high-salt wastewater is relatively complicated, and the high-temperature flue gas after denitration by the boiler is directly used as a heating source to heat and dry the wastewater. Since this high-temperature flue gas contains about 40g / m 3 During the operation, it is easy to cause the accumulation of ash on the pipeline and the equipment body, and the mixture of ash and salt will cause wear to the pipeline and affect the service life. The mixed structure formed by ash and salt drying will adhere to the wall of the drying device, and the long-term accumulation will seriously affect the safety of equipment operation. Contents of th...

Claims

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Application Information

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IPC IPC(8): C02F1/12C02F1/16B01D1/18
CPCB01D1/0041B01D1/0058B01D1/18C02F1/043C02F1/12C02F1/16Y02A20/141
Inventor 刘进李宏秀秦树篷崔德圣潘孝宇吴溪
Owner 华电水务工程有限公司