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A closed circulation process system and method for sodium chlorate crystallization evaporation water

A circulating system, sodium chlorate technology, applied in chloric acid, evaporation, chlorate and other directions, can solve problems such as environmental pollution, save energy, reduce material consumption, and improve the effect of vacuum

Active Publication Date: 2021-06-04
HUNAN HENGGUANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a closed circulation process system for sodium chlorate crystallization evaporation water, the process circulation water absorbing the electrolyte vapor operates independently in a closed environment, and the process circulation water of closed operation overcomes the external impurity band It also overcomes the problem that the substances entrained in the process circulating water are brought into the external environment to pollute the environment, ensuring the quality of sodium chlorate products

Method used

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  • A closed circulation process system and method for sodium chlorate crystallization evaporation water
  • A closed circulation process system and method for sodium chlorate crystallization evaporation water

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Embodiment 1

[0037] attached figure 1 It is a structural schematic diagram of the sodium chlorate crystallization evaporation water closed circulation process system provided by the invention. The sodium chlorate crystallization evaporation water closed circulation process system 100 of the present invention includes an evaporation crystallizer 1, an atmospheric condensate gas 2, a closed cooling water tower 3, a process circulating water pipeline 4 and an overflow pipe 5.

[0038] The evaporation crystallizer 1 includes a cylinder 11, a feed part 12 vertically arranged in the center of the cylinder 11, a funnel-shaped discharge part 13 sleeved outside the feed part 12, and an elliptical head arranged on the top of the cylinder 14. The gas riser 15 located at the top of the oval head 14 . Wherein the feeding part 12 is a straight cylinder, and the liquid flow direction in it is from bottom to top; The feeding part 12 is connected with the feeding pipe 16a, and the sodium chlorate electrol...

Embodiment 2

[0051] Based on the sodium chlorate crystallization evaporation water closed circulation process system of embodiment 1, the sodium chlorate crystallization evaporation water closed circulation process method provided by the invention comprises the steps:

[0052] (1) Supplement cooling water once to the closed cooling water tower to ensure its continuous evaporation of water and maintain heat removal capacity; supplement process soft water to the system through the process soft water inlet pipe until water flow appears at the overflow port of the atmospheric condenser;

[0053] (2) the sodium chlorate electrolytic solution after the preheating enters the feeding part 12 of evaporative crystallizer 1 center, opens the vacuum pump system that is connected with atmospheric condenser non-condensable gas outlet pipe 21, provides vacuum for the initial evaporation of evaporative crystallizer, When the vacuum reaches 90-93KPa, the boiling point of water vapor is 44-46°C, and the wate...

specific Embodiment approach

[0062] By the specific embodiment of the present invention and the processing method of prior art, compare in detail, the sodium chlorate crystallization evaporation water closed loop processing method provided by the present invention and improvement advantage, with the output of 50,000 tons of sodium chlorate / year, The specific implementation is as follows:

[0063] (1) Closed cooling water tower operates independently: when the external temperature is 20°C, before the operation of the crystallization evaporator, the closed cooling water tower is supplemented with industrial water through the replenishment valve, which is used as the cooling circulating water of the closed cooling water tower. After replenishing the water, it operates independently, rated Circulating water volume 900m 3 / h, the head of the cooling water circulation pump is 15 meters, and the motor power is 63kw. The stable operation of the cooling tower ensures the heat removal capacity of the system. The wat...

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Abstract

The invention discloses a sodium chlorate crystallization evaporation water closed circulation process system, comprising an evaporation crystallizer, an atmospheric condenser connected to the evaporation crystallizer, a closed cooling tower with heat exchange tube bundles and an atmospheric condenser connected to the atmospheric The overflow pipe of the condenser, the water outlet of the heat exchange tube bundle is connected with the water inlet of the atmospheric condenser through the first circulating water pipe, and the water outlet of the atmospheric condenser is connected with the water inlet of the heat exchange tube bundle through the first The two circulating water pipes are connected, the second circulating water pipe is provided with a process circulating water pump, and the overflow pipe is used to transport the process circulating water to the sodium chlorate salt system. The invention provides a sodium chlorate crystallization evaporation water closed circulation process system, the process circulation water circulates independently in a closed environment, adapts to the entrainment of mist during the evaporation process of the electrolyte, protects the environment and ensures product quality. The invention also provides a closed circulation process method for sodium chlorate crystallization evaporation water.

Description

technical field [0001] The invention relates to the technical field of sodium chlorate production technology, in particular to a sodium chlorate crystallization evaporation water closed circulation process system and method. Background technique [0002] Sodium chlorate is colorless cubic crystal or trigonal crystal or white powder, tastes salty and cool, easy to deliquescence, melting point 255°C, easily soluble in water, the solubility in water at 0°C is 790g / L. Sodium chlorate has very low oxidizing power in neutral or weakly alkaline solution, but it is a strong oxidizing agent in acidic solution or in the presence of induced oxidizing agent and catalyst such as copper sulfate, and it reacts with acids such as sulfuric acid to release chlorine dioxide; Mixed with sulfur, phosphorus and organic matter or impacted, it is easy to cause combustion and explosion; when heated above 300°C, it is easy to decompose and release oxygen. Sodium chlorate is widely used in the manufa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D1/30B01D9/02C01B11/14
CPCB01D1/30B01D1/305B01D9/0013B01D2009/0086C01B11/145
Inventor 易重庆程米亮赵利启伍小望罗喜元
Owner HUNAN HENGGUANG TECH
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