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Recovery system and recovery method for potassium perchlorate and sodium chloride crystalline salt in wastewater

A technology of potassium perchlorate and recovery system, which is applied in the direction of perchlorate, perchloric acid, chemical instruments and methods, etc., and can solve the problem of the limited length of the overall length of the scalable part

Active Publication Date: 2020-02-07
GUANGDONG WENYANG ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the column-free retractable canopy on the market is mostly used above the ordinary entrance gate or fire lane. One end of the canopy is fixed on the main body of the building and cantilevered outward. In order to meet the requirements of fire rescue, the non-retractable fixed part of the canopy cannot exceed 4m, the overall length of the retractable part is also limited by the length of the fixed part, making it difficult for the overall length of the canopy to exceed 8m. limited

Method used

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  • Recovery system and recovery method for potassium perchlorate and sodium chloride crystalline salt in wastewater

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Embodiment 1

[0027] Please refer to figure 1 , the present invention provides a recovery system 100 of potassium perchlorate and sodium chloride crystalline salt in waste water, the recovery system 100 comprises a freezing device 10, an MVR evaporation crystallization device 20, an MVR thick centrifugal device 30, a freezing precipitation device 40, a chlorate The metathesis device 50 and the electrolysis device 60, the freezing device 10 is used to freeze waste water, to separate out potassium perchlorate and obtain the first mother liquor, the MVR evaporative crystallization device 10 is connected to the freezing device 10, and is used to receive the first mother liquor and evaporate and concentrate the first mother liquor , to obtain concentrated solution, MVR thick centrifugal device 20 communicates with MVR evaporative crystallization device 10, is used to receive above-mentioned concentrated solution and carries out crystallization to this concentrated solution, to separate out sodium...

Embodiment 2

[0066] The present embodiment improves the recovery method of potassium perchlorate, sodium chloride crystalline salt in a kind of waste water, comprises the steps:

[0067] The waste water is frozen to separate out potassium perchlorate and obtain the first mother liquor;

[0068] Evaporating and concentrating the first mother liquor at the solubility critical point of potassium perchlorate and sodium chloride to obtain a concentrate;

[0069] Discharging the concentrated liquid in the concentrated liquid and separating the solid and liquid to obtain sodium chloride and the second mother liquor;

[0070] The second mother liquor is cooled and separated into solid and liquid to obtain the mixed salt of potassium perchlorate and potassium chlorate;

[0071] Carry out metathesis reaction and solid-liquid separation with mixed salt and sodium perchlorate, obtain potassium perchlorate and the 3rd mother liquor (sodium chlorate mother liquor);

[0072] The third mother liquor (so...

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Abstract

The invention discloses a recovery system and recovery method for potassium perchlorate and sodium chloride crystalline salts in wastewater. The recovery system comprises a freezing device, an MVR evaporative crystallization device, an MVR thick centrifugal device, a freezing precipitation device, a chlorate metathesis device and an electrolysis device, wherein the freezing device communicates with the MVR evaporative crystallization device; the MVR thick centrifugal device communicates with the MVR evaporative crystallization device; the freezing precipitation device communicates with the MVRthick centrifugal device; the chlorate metathesis device communicates with the freezing precipitation device; and the electrolysis device communicates with the chlorate metathesis device. According to the recovery system for potassium perchlorate and sodium chloride crystalline salts in the wastewater disclosed by the invention, high-purity solids and wastewater which can be directly discharged can be obtained.

Description

technical field [0001] The invention relates to the technical field of building design, in particular to a recovery system and recovery method for potassium perchlorate and sodium chloride crystalline salt in waste water. Background technique [0002] According to the requirements of the "Code for Design of Building Fire Protection", the movable canopy whose outer edge distance exceeds 5m from the outer wall of the building is currently used for the canopy where fire rescue is required. At present, the column-free retractable canopy on the market is mostly used above the ordinary entrance gate or fire lane. One end of the canopy is fixed on the main body of the building and cantilevered outward. In order to meet the requirements of fire rescue, the non-retractable fixed part of the canopy cannot exceed 4m, the overall length of the retractable part is also limited by the length of the fixed part, making it difficult for the overall length of the canopy to exceed 8m. limited...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01B11/18C01D3/06C01D3/14C25B1/26C02F101/12
CPCC02F9/00C01B11/18C01D3/14C01D3/06C25B1/265C02F2101/12C02F1/22C02F1/048C02F1/38C02F1/46104C02F1/461
Inventor 叶伟炳王明富
Owner GUANGDONG WENYANG ENVIRONMENTAL TECH CO LTD
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