CN101054163A - Technique for secondary extracting bromine from waste liquid by extracting bromine once - Google Patents
Technique for secondary extracting bromine from waste liquid by extracting bromine once Download PDFInfo
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- CN101054163A CN101054163A CN 200710014116 CN200710014116A CN101054163A CN 101054163 A CN101054163 A CN 101054163A CN 200710014116 CN200710014116 CN 200710014116 CN 200710014116 A CN200710014116 A CN 200710014116A CN 101054163 A CN101054163 A CN 101054163A
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- bromine
- bittern
- absorption
- waste liquid
- extraction
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Abstract
The invention is a novel secondary extracting bromine technics of ultilizing primary extracting bromine exhaust liquid, air feed amount of spraying 1m3 brine is 140-180 m3; spray density of brine is 20-30 m3/m2, hour. Bromine air flows into a absorber then flows through a first absorber (1), passage (3) and a second absorber (4), finally discharged from a upper outlet of the second absorber (4). The efficiency of secondary extracting bromine gets to 72% which using reference of the primary extracting bromine containing bromic ions and 60ppm free bromine.
Description
Technical field the present invention relates to a kind of method of extracting bromine from bittern, and the novel process of bromine waste liquid second extraction bromine is once put forward in particularly a kind of utilization.
The background technology air blows out acid system system bromine, and is lower with its energy consumption, and the more high advantage of extraction yield is widely used in bittern system bromine at present.But utilize in the bittern after this method is once carried bromine generally still bromine ion-containing and free bromine 50-70ppm,, certainly will cause the waste of this expensive resource of bromine if will once carry bittern behind the bromine directly as evaporating brine raw material.
In the existing secondary method for extracting bromine, generally adopt and once carry essentially identical technology of bromine and equipment.Because not enough for the bittern characteristic research of once carrying behind the bromine, ubiquity technology is reasonable inadequately, the shortcoming that extraction yield is on the low side because specific aim is relatively poor for existing method.
Summary of the invention the objective of the invention is to overcome above-mentioned existing methods deficiency, and provide a kind of utilization once to put forward the novel process of bromine waste liquid second extraction bromine, technical problem to be solved is: carry the processing condition and the equipment structure of bromine by improving secondary, it is stronger to make secondary put forward bromine technology specific aim, more reasonable, the extraction yield of bromine is higher.
The technical solution adopted in the present invention is as follows:
The novel process of bromine waste liquid second extraction bromine is once put forward in a kind of utilization, comprises the following steps of carrying out successively:
The first step: the bittern of once carrying behind the bromine flows into Buffer Pool naturally;
Second step: utilize liquid pump that the bittern in the Buffer Pool is pumped into stripping tower through pipeline, add chlorine in the pipeline and make bromide anion oxidation in pipeline;
The 3rd step: bittern enters stripping tower from the top spray, utilizes blower fan upwards to be blown into air from blowing out tower bottom, free bromine in the bittern is parsed form the bromine air;
The 4th step: bromine air admission absorption tower, and add sulfurous gas and water, form hydrobromic acid mist;
The 5th step: hydrobromic acid mist distilled make bromine;
It is characterized in that: in the 3rd step, spray 1m
3The wind supply quantity of bittern is 140-180m
3, preferred 140-160m
3The specific liquid rate of bittern is: 20--30m
3/ m
2, hour, preferred 20--25m
3/ m
2, hour.
In the 4th step, the absorption tower is cut off and is divided into two absorption chambers, i.e. first absorption chamber and second absorption chamber, between two absorption chambers passage as the revolution mouth of bromine air, this passage is positioned at and cuts off the below; Flow through successively behind the bromine air admission absorption tower first absorption chamber, passage and second absorption chamber are discharged from the outlet of second absorption chamber upper end.
In the 4th step, sulfurous gas and water join respectively from two small transfer lines in first absorption chamber and second absorption chamber.
In second step, adding amount of chlorine in the pipeline is that benchmark is between 110--120% with brominated amount.
In the 4th step, the add-on of water makes the content of bromine in the absorption liquid at 30--50kg/m
3
The 5th the step in, chlorine dosage with brominated amount be benchmark between 105--110%, steam temperature is between 80--90 ℃.
Stripping tower and absorption tower are the disjunctor squarer.
Used liquid pump is that polyethylene rolls the lining corrosion-resistant pump.
Positively effect of the present invention is: (1), to spray during bittern the control of wind supply quantity and specific liquid rate passed through lot of experiments, and found preferred range.Wind supply quantity is low excessively, and the yield of bromine is affected, and the too high bittern that then causes is blown out in the lump.Specific liquid rate is too high, and the yield of bromine is affected, and crosses to hang down then to cause bittern to be blown out in the lump.Guaranteed higher bromine yield.(2), the bromine air single-revolution cavity of in the absorption tower, flowing through, Hydrogen bromide condenses gradually and falls to being collected in its process, avoids being taken away by gas phase as far as possible, and then increases the bromine yield of present method.(3), sulfurous gas and water joins two absorption chambers respectively from two small transfer lines, strengthened the contact reacts of itself and bromine air.(4), stripping tower and absorption tower be the disjunctor squarer, compare with existing circular tower, the one, windage is little, cuts down the consumption of energy; The 2nd, simple in structure, reduce installation costs; The 3rd, save initial cost.(5), used liquid pump is that polyethylene rolls the lining corrosion-resistant pump, the work-ing life of overcurrent element was above 1 year.(6), without acidizing process, reduced supplies consumption, improved production efficiency.(7), to adding amount of chlorine in the pipeline, the add-on of water in the 4th step, technical parameters such as chlorine dosage and steam temperature have carried out a large amount of comparative studies and experiment in the 5th step, and have found the preferred value scope.
Secondary is put forward the bromine rate and is reached 72% (the bromine waste liquid of once carrying with bromine ion-containing and free bromine 60ppm is a benchmark).
Description of drawings Fig. 1 is the synoptic diagram that shows that bromine air of the present invention flows in the absorption tower.
Embodiment further specifies the present invention below in conjunction with embodiment and accompanying drawing.
Embodiment one
The first step: the bittern of once carrying behind the bromine (pH value is about 3) flows into Buffer Pool naturally; Surge time: about 90 seconds.
Second step: utilize liquid pump that the bittern in the Buffer Pool is pumped into stripping tower through pipeline, the chlorine that adds 110% (is benchmark with brominated amount) in the pipeline makes bromide anion complete oxidation in pipeline.
The 3rd step: bittern enters stripping tower from the top spray, utilizes blower fan upwards to be blown into air from blowing out tower bottom, free bromine in the bittern is parsed form the bromine air; Spray 1m
3The wind supply quantity of bittern is 140m
3The specific liquid rate of bittern is: 20m
3/ m
2, hour.
The 4th step: bromine air admission absorption tower, and add sulfurous gas and water, form hydrobromic acid mist; The add-on of water makes the content of bromine in the absorption liquid at 30kg/m
3
As shown in Figure 1, the absorption tower is cut off 2 and is divided into two absorption chambers, promptly between first absorption chamber 1 and second absorption chamber, 4, two absorption chambers passage 3 as the revolution mouth of bromine air, this passage 3 is positioned at and cuts off 2 belows; Flow through successively behind the bromine air admission absorption tower first absorption chamber 1, passage 3 and second absorption chamber 4 are discharged from the outlet of second absorption chamber, 4 upper ends.
Sulfurous gas and water join respectively from two small transfer lines in first absorption chamber 1 and second absorption chamber 4.
The 5th step: hydrobromic acid mist distilled make bromine; This step chlorine dosage 105% (is benchmark with brominated amount), 80 ℃ of steam temperatures.
Stripping tower and absorption tower are the disjunctor squarer.
Used liquid pump is that polyethylene rolls the lining corrosion-resistant pump.
Wherein, stripping tower effectively to blow out area be 75m
2, the total effective absorbing area in absorption tower is 60m
2
Embodiment two
Second step: utilize liquid pump that the bittern in the Buffer Pool is pumped into stripping tower through pipeline, the chlorine that adds 115% (is benchmark with brominated amount) in the pipeline makes bromide anion complete oxidation in pipeline.
The 3rd step: bittern enters stripping tower from the top spray, utilizes blower fan upwards to be blown into air from blowing out tower bottom, free bromine in the bittern is parsed form the bromine air; Spray 1m
3The wind supply quantity of bittern is 155m
3The specific liquid rate of bittern is: 24m
3/ m
2, hour.
The 4th step: bromine air admission absorption tower, and add sulfurous gas and water, form hydrobromic acid mist; The add-on of water makes the content of bromine in the absorption liquid at 40kg/m
3
The 5th step: hydrobromic acid mist distilled make bromine; This step chlorine dosage 107% (is benchmark with brominated amount), 85 ℃ of steam temperatures.
Other processing condition are with embodiment one.
Embodiment three
Second step: utilize liquid pump that the bittern in the Buffer Pool is pumped into stripping tower through pipeline, the chlorine that adds 120% (is benchmark with brominated amount) in the pipeline makes bromide anion complete oxidation in pipeline.
The 3rd step: bittern enters stripping tower from the top spray, utilizes blower fan upwards to be blown into air from blowing out tower bottom, free bromine in the bittern is parsed form the bromine air; Spray 1m
3The wind supply quantity of bittern is 180m
3The specific liquid rate of bittern is: 30m
3/ m
2, hour.
The 4th step: bromine air admission absorption tower, and add sulfurous gas and water, form hydrobromic acid mist; The add-on of water makes the content of bromine in the absorption liquid at 50kg/m
3
The 5th step: hydrobromic acid mist distilled make bromine; This step chlorine dosage 110% (is benchmark with brominated amount), 90 ℃ of steam temperatures.
Other processing condition are with embodiment one.
Claims (9)
1, the novel process of bromine waste liquid second extraction bromine is once put forward in a kind of utilization, comprises the following steps of carrying out successively:
The first step: the bittern of once carrying behind the bromine flows into Buffer Pool naturally;
Second step: utilize liquid pump that the bittern in the Buffer Pool is pumped into stripping tower through pipeline, add chlorine in the pipeline and make bromide anion oxidation in pipeline;
The 3rd step: bittern enters stripping tower from the top spray, utilizes blower fan upwards to be blown into air from blowing out tower bottom, free bromine in the bittern is parsed form the bromine air;
The 4th step: bromine air admission absorption tower, and add sulfurous gas and water, form hydrobromic acid mist;
The 5th step: hydrobromic acid mist distilled make bromine;
It is characterized in that: in the 3rd step, spray 1m
3The wind supply quantity of bittern is 140-180m
3The specific liquid rate of bittern is: 20--30m
3/ m
2, hour.
2, the novel process of bromine waste liquid second extraction bromine is once put forward in utilization as claimed in claim 1, it is characterized in that: in the 3rd step, and spray 1m
3The wind supply quantity of bittern is 140-160m
3The specific liquid rate of bittern is: 20--25m
3/ m
2, hour.
3, the novel process of bromine waste liquid second extraction bromine is once put forward in utilization as claimed in claim 1, it is characterized in that: in the 4th step, the absorption tower is cut off (2) and is divided into two absorption chambers, i.e. first absorption chamber (1) and second absorption chamber (4), between two absorption chambers passage (3) as the revolution mouth of bromine air, this passage (3) is positioned at partition (2) below; Flow through successively behind the bromine air admission absorption tower first absorption chamber (1), passage (3) and second absorption chamber (4) are discharged from the outlet of second absorption chamber (4) upper end.
4, the novel process of bromine waste liquid second extraction bromine is once put forward in utilization as claimed in claim 3, it is characterized in that: in the 4th step, sulfurous gas and water join respectively from two small transfer lines in first absorption chamber (1) and second absorption chamber (4).
5, once put forward the novel process of bromine waste liquid second extraction bromine as claim 1 or 2 or 3 or 4 described utilizations, it is characterized in that: in second step, adding amount of chlorine in the pipeline is that benchmark is between 110--120% with brominated amount.
6, once put forward the novel process of bromine waste liquid second extraction bromine as claim 1 or 2 or 3 or 4 described utilizations, it is characterized in that: in the 4th step, the add-on of water makes the content of bromine in the absorption liquid at 30--50kg/m
3
7, once put forward the novel process of bromine waste liquid second extraction bromine as claim 1 or 2 or 3 or 4 described utilizations, it is characterized in that: in the 5th step, chlorine dosage with brominated amount be benchmark between 105--110%, steam temperature is between 80--90 ℃.
8, once put forward the novel process of bromine waste liquid second extraction bromine as claim 1 or 2 or 3 or 4 described utilizations, it is characterized in that: stripping tower and absorption tower are the disjunctor squarer.
9, once put forward the novel process of bromine waste liquid second extraction bromine as claim 1 or 2 or 3 or 4 described utilizations, it is characterized in that: used liquid pump is that polyethylene rolls the lining corrosion-resistant pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100141160A CN100503428C (en) | 2007-03-28 | 2007-03-28 | Technique for secondary extracting bromine from waste liquid by extracting bromine once |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100141160A CN100503428C (en) | 2007-03-28 | 2007-03-28 | Technique for secondary extracting bromine from waste liquid by extracting bromine once |
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| Publication Number | Publication Date |
|---|---|
| CN101054163A true CN101054163A (en) | 2007-10-17 |
| CN100503428C CN100503428C (en) | 2009-06-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913564A (en) * | 2010-07-30 | 2010-12-15 | 天津长芦海晶集团有限公司 | Method for preparing bromine from brine |
| CN102335543A (en) * | 2011-08-26 | 2012-02-01 | 莱州诚源盐化有限公司 | Device and method for recovering tail gas in bromine packaging |
| CN102556972A (en) * | 2012-02-10 | 2012-07-11 | 淮北师范大学 | Method for extracting bromine by industrial wastewater rich in Br- |
| CN108862198A (en) * | 2018-08-22 | 2018-11-23 | 天津海晶科技发展有限公司 | The automatic adjustment technique of bromine Reducing and absorption water processed |
| CN114591141A (en) * | 2022-04-08 | 2022-06-07 | 浙江永太科技股份有限公司 | Preparation method of 2,4, 5-trifluorobenzyl bromide |
-
2007
- 2007-03-28 CN CNB2007100141160A patent/CN100503428C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913564A (en) * | 2010-07-30 | 2010-12-15 | 天津长芦海晶集团有限公司 | Method for preparing bromine from brine |
| CN102335543A (en) * | 2011-08-26 | 2012-02-01 | 莱州诚源盐化有限公司 | Device and method for recovering tail gas in bromine packaging |
| CN102556972A (en) * | 2012-02-10 | 2012-07-11 | 淮北师范大学 | Method for extracting bromine by industrial wastewater rich in Br- |
| CN108862198A (en) * | 2018-08-22 | 2018-11-23 | 天津海晶科技发展有限公司 | The automatic adjustment technique of bromine Reducing and absorption water processed |
| CN114591141A (en) * | 2022-04-08 | 2022-06-07 | 浙江永太科技股份有限公司 | Preparation method of 2,4, 5-trifluorobenzyl bromide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100503428C (en) | 2009-06-24 |
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