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Method for evaporating sodium persulfate at low temperature

A sodium persulfate, low-temperature evaporation technology, applied in peroxyhydrate/peroxyacid, sustainable manufacturing/processing, climate sustainability, etc., can solve the problem of lack of substances, high specific energy consumption, and evaporator thermal efficiency Low problems, to achieve the effect of reducing evaporation temperature and high degree of automation

Active Publication Date: 2012-01-18
SHENZHEN SUNEVAP TECH
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Problems solved by technology

[0002] Sodium persulfate will decompose and denature when the temperature is higher, generate other substances, and cannot obtain the required substances. The prior art adopts the method of low-temperature evaporation and crystallization of sodium persulfate, and adopts a steam boiler. The thermal efficiency of the evaporator is low and the specific energy is low. High consumption

Method used

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  • Method for evaporating sodium persulfate at low temperature
  • Method for evaporating sodium persulfate at low temperature
  • Method for evaporating sodium persulfate at low temperature

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. Such as figure 1 Shown, the method for low-temperature evaporation sodium persulfate of the present invention may further comprise the steps:

[0016] 1. Feed material, the saturated sodium persulfate solution stock solution A at a temperature of 25°C is stored in the stock solution tank, and is pumped into the plate heat exchanger 1 by the feed pump, and the stock solution A in the plate heat exchanger 1 is evaporated with forced circulation Heat exchange with the secondary steam condensate in the vessel 9. After being preheated once, the stock solution A enters the tube-and-tube heat exchanger 8. In the tube-and-tube heat exchanger 8, the stock solution A, the steam non-condensable gas C from the forced circulation evaporator 9 and the steam non-condensable gas mixed in Secondary steam for heat exchange. After the second preheating, the tem...

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Abstract

The invention discloses a method for evaporating sodium persulfate at a low temperature, and the technical problem needs to be solved, and the cost for evaporating the sodium persulfate needs to be lowered. The method disclosed by the invention comprises the following steps of: feeding and preheating, forcibly and circularly heating and evaporating, crystallizing and separating through a separator, extracting, and centrifuging to obtain sodium-persulfate crystal grains and a mother solution. Compared with the prior art, the sodium persulfate is evaporated by using a mechanical-type steam-recompression evaporator, so that the evaporating temperature of the sodium persulfate is decreased, energy is saved, and the environment is protected; the energy consumption for evaporating 1 ton of water is about 1 / 6 to 1 / 5 of that of a traditional evaporator, so that the method completely gets rid of the dependence on a steam boiler and can be used as along as electricity exists; and the method hasa high automation degree and fully-automatic working flows and does not need to be manually monitored.

Description

technical field [0001] The present invention relates to a kind of production method of sodium persulfate, particularly a kind of method of evaporating sodium persulfate. Background technique [0002] Sodium persulfate will decompose and denature when the temperature is higher, generate other substances, and cannot obtain the required substances. The prior art adopts the method of low-temperature evaporation and crystallization of sodium persulfate, and adopts a steam boiler. The thermal efficiency of the evaporator is low and the specific energy is low. High consumption. Contents of the invention [0003] The object of the invention is to provide a kind of method of low-temperature evaporation sodium persulfate, the technical problem to be solved is to reduce the cost of evaporating sodium persulfate. [0004] The present invention adopts the following technical solutions: a method for evaporating sodium persulfate at low temperature, comprising the following steps: 1. Fe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/08
CPCY02P20/10
Inventor 张小江
Owner SHENZHEN SUNEVAP TECH
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