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Oxidation and blowout technological process and apparatus for bittern bromine process

A process method and brine technology, applied in the field of bromine extraction from brine, can solve the problems of waste of energy and resources, large consumption of chlorine, low yield of bromine, etc., to reduce corrosion, reduce floor space, and improve oxidation rate. Effect

Active Publication Date: 2009-07-22
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this process consumes a lot of liquid chlorine, high power consumption, and low bromine yield
This directly leads to the waste of energy and resources

Method used

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  • Oxidation and blowout technological process and apparatus for bittern bromine process
  • Oxidation and blowout technological process and apparatus for bittern bromine process
  • Oxidation and blowout technological process and apparatus for bittern bromine process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: The bromine content of brine is 50mg / L, and its main equipment: two rotating packed beds are respectively made of stainless steel wire mesh packing, and the shells and storage tanks of the two rotating packed beds are made of polytetrafluoroethylene. The gas-liquid contact mode is cross-flow.

[0037] Adjust the pH value of the raw brine to 3 with dilute sulfuric acid. Turn on the rotary packed bed I, control its speed at 400r / min through the frequency converter I, and the chlorine distribution rate at 120%. The acidified brine contacts with chlorine gas in the packing layer, and an oxidation reaction occurs; the oxidizing solution stays in the storage tank for a period of time to be brominated. After the ions are completely oxidized at a specific chlorine distribution rate, turn on the rotating packed bed II, control its speed at 800r / min through the frequency converter II, and then turn on the fan to control the gas-liquid ratio at 50m 3 / m 3 ; The oxi...

Embodiment 2

[0038] Embodiment 2: The bromine content of the brine is 350mg / L, and its main equipment: two rotating packing beds are respectively made of stainless steel wire mesh packing, and the shells and storage tanks of the two rotating packing beds are made of stainless steel. The gas-liquid contact mode is cross-flow.

[0039] Adjust the pH value of the raw brine to 3.2, turn on the rotary packed bed I, control its rotating speed at 600r / min through the frequency converter I, and the chlorine distribution rate at 130%, the acidified brine contacts with chlorine gas in the packed layer, and an oxidation reaction occurs; the oxidation solution After staying in the storage tank for a period of time, turn on the rotating packed bed II, control its speed at 1000r / min through the frequency converter II, and then turn on the fan to control the gas-liquid ratio at 300m 3 / m 3 ; The oxidizing solution is in contact with the air in the filler to complete the mass transfer process and blow ou...

Embodiment 3

[0040] Example 3: The bromine content of the brine is 250mg / L, and its main equipment: two rotating packed beds are respectively made of stainless steel wire mesh packing, and the shells and storage tanks of the two rotating packed beds are made of stainless steel and polytetrafluoroethylene respectively. The gas-liquid contact mode is countercurrent.

[0041] Adjust the pH value of the raw brine to 3.3, turn on the rotary packed bed I, control its rotating speed at 800r / min through the frequency converter I, and the chlorine distribution rate at 110%, and the acidified brine contacts with chlorine gas in the packed layer, and an oxidation reaction occurs; the oxidation solution After staying in the storage tank for a period of time, turn on the rotating packed bed II, control its speed at 600r / min through the frequency converter II, then turn on the fan, and control the gas-liquid ratio at 200m 3 / m 3 ; The oxidizing solution is in contact with the air in the filler to compl...

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Abstract

The invention pertains to the technical field of extraction of bromine from brine, more particularly relates to the technique of oxidation and blow-out during the process of extraction of bromine from brine, and a device thereof, which improve the oxidation rate and blow-out rate of bromine during the extraction process and reduce energy consumption. The method is as follows: acid brine and chlorine are introduced into a rotating packed bed I, and the formed oxidation solution and air enter a rotating packed bed II to blow out free bromine. The device comprises two rotating packed beds, the liquid inlet of the rotating packed bed I is connected with a pump and the gas inlet thereof is connected with a chlorine pipe; the rotating packed bed I and the rotating packed bed II are connected by a storage tank; and the gas inlet of the rotating packed bed II is connected with a fan. The method has the advantages of improving the oxidation rate of bromonium ions, the utilization ratio of chlorine and the blow-out rate of free bromine, and reducing chlorine adding ratio, chlorine consumption amount, the causticity of the device during the process after the extraction of bromine and the process of salt extraction, gas-liquid ratio and operation cost; and the device occupies less land and is easy to be start and shut off and maintained.

Description

technical field [0001] The invention belongs to the technical field of extracting bromine from brine, and in particular relates to a process and a device for oxidation and blowing out of bromine in the process of extracting bromine from brine. Background technique [0002] Bromine is an important chemical raw material, widely used in high-efficiency flame retardants, refrigerants, petroleum finishing fluids, pharmaceuticals, fuel intermediates, and chemical reagents. At present, there are several methods for extracting bromine from brine: steam distillation, air blowing (acid absorption method, lye absorption method), resin adsorption method, extraction method and precipitation method. In view of the low bromine content of brine resources in my country, considering the maturity of production technology and cost, bromine is generally produced by air blowing acid solution absorption method in China. At present, this process consumes a lot of liquid chlorine, high power consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/09
Inventor 刘有智焦纬洲袁志国张琳娜
Owner ZHONGBEI UNIV
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