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A device and working method for strengthening salt spray dehydration by using air heat exchange tubes

A technology of heat exchange tubes and air, applied in chemical instruments and methods, separation methods, general water supply saving, etc., can solve the problems of large equipment volume, small specific heat of air, poor thermal conductivity, etc., to overcome compaction and reduce occupied space , conducive to the effect of evaporation and crystallization

Active Publication Date: 2022-05-06
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small specific heat and poor thermal conductivity of the air, and the salt spray is also in motion, the process takes a long time and the equipment is large

Method used

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  • A device and working method for strengthening salt spray dehydration by using air heat exchange tubes
  • A device and working method for strengthening salt spray dehydration by using air heat exchange tubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one: the rapid dehydration of sodium chloride (NaCl) solution:

[0026] (1) Concentrate the sodium chloride solution to near the saturation concentration (about 26.4%) at normal pressure and room temperature, and store it in the high-pressure brine storage tank 2 . Fill the hydronic circuit with hot water.

[0027] (2) Start blower 10 and set the flow rate to 1.5m 3 ·s -1 ;Start the circulation pump 6 and set the flow rate to 1.0m 3 ·s -1 . Turn on the air supply heater 12 and the circulation heater 9, and run for 5 minutes, so that the temperature at the rectification grid 5 is kept at 40°C, and the temperature at the air heat exchange tube 7 is kept at 90°C.

[0028] (3) The sodium chloride solution was added at 15g·s -1 The flow rate is ejected from nozzle 1. The salt mist adheres to the air heat exchange tube 7 and dehydrates to crystallize and grow until it falls off and falls into the collecting hopper 4 under the vibration of the air heat exchan...

Embodiment 2

[0030] Embodiment two: sodium sulfate (Na 2 SO 4 ) rapid dehydration of the solution:

[0031] (1) Concentrate the sodium sulfate solution to the saturation concentration (about 32.7%) under normal pressure and 40° C., and store it in the high-pressure brine storage tank 2 and keep it at 40° C. Fill the hydronic loop with glycol.

[0032] (2) Start blower 10 and set the flow rate to 1.0m 3 ·s -1 ;Start the circulation pump 6 and set the flow rate to 0.8m 3 ·s -1 . Turn on the air supply heater 12 and the circulation heater 9, and run for 5 minutes, so that the temperature at the rectification grid 5 is kept at 50°C, and the temperature at the air heat exchange tube 7 is kept at 110°C.

[0033] (3) The sodium sulfate aqueous solution is 12g·s -1 The flow rate is ejected from nozzle 1. The salt mist adheres to the air heat exchange tube 7 and dehydrates to crystallize and grow until it falls off and falls into the collecting hopper 4 under the vibration of the air heat ...

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Abstract

A device and working method for strengthening salt spray dehydration by using air heat exchange tubes, the device is composed of a desalination chamber, an air supply section, a brine injection part and a circulation heating circuit; the desalination chamber includes a desalination chamber and a collecting hopper; the air supply section Including air supply fan, air supply pipe, air supply heater, transition section and rectification grid; water injection part includes nozzle and high-pressure brine storage tank; circulation heating circuit includes circulation pump, air heat exchange pipe, circulation pipeline and circulation heater . The invention can use the air heat exchange tube to strengthen the evaporation of salt mist, so that the salt mist can quickly crystallize and fall off, and realize faster and more efficient salt-water separation.

Description

technical field [0001] The invention relates to the technical field of material processing and material separation, in particular to a device and working method for accelerating desalination by using air heat exchange tubes to strengthen salt spray dehydration. Background technique [0002] The desalination process widely exists in various industrial and agricultural fields such as chemical production, seawater desalination, and desalination purification. Its essence is to pursue efficient and rapid separation of solutes and solvents. [0003] The desalination method widely used in industry is generally thermal desalination method, which can be further divided into conduction heating method and convection heating method. The conduction heating method uses a heating surface to heat salt spray or salt solution to evaporate the solvent and precipitate the solute; however, this method tends to crystallize the surface of the heater and cause compaction, so the product needs to be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D1/18B01D1/30B01D9/02
CPCB01D1/18B01D1/30B01D9/00Y02A20/124
Inventor 张丹邓才智贾金睿郑巨淦王一笑袁洋
Owner XI AN JIAOTONG UNIV