CN115557468A - Method for extracting bromine from brine - Google Patents
Method for extracting bromine from brine Download PDFInfo
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- CN115557468A CN115557468A CN202211202788.5A CN202211202788A CN115557468A CN 115557468 A CN115557468 A CN 115557468A CN 202211202788 A CN202211202788 A CN 202211202788A CN 115557468 A CN115557468 A CN 115557468A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/09—Bromine; Hydrogen bromide
- C01B7/096—Bromine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/007—Energy recuperation; Heat pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/009—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in combination with chemical reactions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention discloses a method for extracting bromine in brine, which is realized by bromine extraction equipment, acidified brine and chlorine are mixed to generate free bromine, the free bromine is discharged by air in a blowing tower and is sent into an absorption tower, the free bromine in the absorption tower enters sulfur dioxide aqueous solution to form absorption liquid containing hydrobromic acid, the absorption liquid is heated by heat generated by combustion of sulfur, the absorption liquid enters a distillation tower and reacts with chlorine to generate hydrogen chloride and free bromine, the free bromine is evaporated into bromine steam under the action of the heat of the absorption liquid, and the air flowing out of the absorption tower enters the blowing tower again to be used for blowing bromine. The method completely utilizes the heat generated by the combustion of the sulfur to produce the bromine, does not need to use an external heat source, and has good energy-saving effect.
Description
Technical Field
The invention relates to a method for extracting bromine from brine, in particular to an energy-saving method for extracting bromine from brine.
Background
In the current industrial bromine production, two methods are mainly used for extracting bromine, namely a steam distillation method and an air blowing method, and the air blowing method is the most important method for preparing bromine in China at present. In the process of producing bromine by an air blowing method, two absorption and conversion modes are provided, one is acid absorption by using sulfur dioxide gas, the other is alkaline absorption by using alkali liquor, and the acid absorption mode is adopted in domestic bromine plants due to the high cost and low conversion rate of the alkaline absorption mode.
The acid absorption is to utilize the reaction of the water solution of sulfur dioxide and bromine in bromine-containing air to form an absorption liquid containing hydrobromic acid, the reaction of the hydrobromic acid in the absorption liquid and chlorine gas is carried out in a distillation tower to generate hydrogen chloride and free bromine, the temperature in the distillation tower is heated by an external heat source (such as boiler steam), the free bromine is changed into bromine steam and flows out of the distillation tower, and the bromine steam is cooled to be changed into a bromine product. The sulfur dioxide is prepared by burning sulfur, and the heat generated by burning the sulfur is not fully applied to the preparation of bromine products, so that the energy consumption is higher.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for extracting bromine in brine so as to achieve the purposes of saving energy and reducing consumption.
The method for extracting bromine from brine provided by the invention is realized by bromine extraction equipment, and comprises the following steps:
(1) Mixing the acidified brine and chlorine gas, feeding the mixture into an oxidation tower, and oxidizing bromide ions into free bromine to obtain oxidized brine; spraying the oxidized brine downwards from the top of the blow-off tower to form a liquid film on the surface of the filler in the blow-off tower; simultaneously, blowing air upwards from the bottom of the blow-off tower through a fan to ensure that the air is fully contacted with the oxidized brine so as to resolve free bromine and diffuse the free bromine into the air to form bromine-containing air, and blowing the bromine-containing air out of the upper part of the blow-off tower; when the bromine-containing air is formed, the sulfur is combusted in the sulfur combustion furnace to generate high-temperature sulfur dioxide gas, and the sulfur dioxide gas flows through the heat exchange device to be cooled and then enters the water washing tower to be washed and dedusted;
(2) Mixing bromine-containing air, the dedusted sulfur dioxide gas and the purified sulfur dioxide washing water, and feeding the mixture into an absorption tower, wherein bromine in the bromine-containing air enters a sulfur dioxide aqueous solution to form an absorption liquid containing hydrobromic acid, the bromine-containing air becomes bromine-removed air, the absorption liquid flows out of the bottom of the absorption tower to an absorption liquid tank, and the bromine-removed air returns to the inlet of a fan and is fed into a blowing tower by the fan for blowing out bromine;
(3) Absorbing liquid in the absorbing liquid tank passes through an acid liquor heat exchanger and a heat exchange device to form liquid with the temperature of more than 60 ℃, the liquid enters a distillation tower, hydrobromic acid in the absorbing liquid reacts with chlorine entering the distillation tower to generate hydrogen chloride and free bromine, the free bromine is evaporated into bromine vapor under the action of self heat of the absorbing liquid, and the bromine vapor flows out of the distillation tower and is cooled to form a final product bromine; the chlorine hydride is changed into acid liquor when meeting water, the acid liquor flows out from the bottom of the distillation tower and then flows through the acid liquor heat exchanger to preheat the absorption liquid flowing into the acid liquor heat exchanger, the acid liquor flowing out from the acid liquor heat exchanger flows through the chlorine vaporizer for chlorine vaporization, and the acid liquor flowing out from the chlorine vaporizer is used for the acidification of brine; and one part of the chlorine gas flowing out of the chlorine gas vaporizer enters a distillation tower to be used for reacting with hydrobromic acid, and the other part of the chlorine gas is used for oxidizing acidified brine.
The bromine extraction equipment comprises a sulfur combustion furnace, a brine tank, a water washing tower, an absorption tower, a blow-off tower, an oxidation tower and a distillation tower; a heating tube array is arranged in the sulfur combustion furnace, the heating tube array is communicated with a heat exchange device, an air inlet of the heat exchange device is communicated with a smoke outlet of the sulfur combustion furnace, an air outlet of the heat exchange device is communicated with the lower part of a washing tower, the bottom of the washing tower is communicated with a sedimentation tank, the upper part of the washing tower is communicated with an outlet of a water pump, and an inlet of the water pump is communicated with the sedimentation tank; the brine tank is communicated with a water inlet of the oxidation tower through a brine pump and a brine pipe, a water outlet of the oxidation tower is communicated with the upper part of the blow-off tower, the top of the blow-off tower is communicated with the top of the absorption tower through an air communicating pipe, and the top of the washing tower and an outlet of the water pump are communicated with the air communicating pipe; the bottom of the absorption tower is communicated with the absorption liquid tank, the lower part of the absorption tower is communicated with the inlet of the fan, and the outlet of the fan is communicated with the lower part of the blow-off tower; the absorption liquid tank is communicated with an absorption liquid inlet of the acid liquid heat exchanger through an absorption liquid delivery pump, an absorption liquid outlet of the acid liquid heat exchanger is communicated with an absorption liquid inlet of a heat exchange device, an absorption liquid outlet of the heat exchange device is communicated with the upper part of the distillation tower, the top of the distillation tower is communicated with a condenser, the condenser is communicated with a bromine tank, the bottom of the distillation tower is communicated with the acid liquid tank, the acid liquid tank is communicated with the acid liquid inlet of the acid liquid heat exchanger through an acid liquid delivery pump, an acid liquid outlet of the acid liquid heat exchanger is communicated with an acid liquid inlet of a chlorine vaporizer, an acid liquid outlet of the chlorine vaporizer is communicated with a brine pipe, an air inlet of the chlorine vaporizer is communicated with a chlorine storage tank, an air outlet of the chlorine vaporizer is communicated with an air inlet of a chlorine buffer tank, and an air outlet of the chlorine buffer tank is communicated with the lower part of the distillation tower and the brine pipe.
The heat exchange device comprises a primary heat exchanger, a secondary heat exchanger and a tertiary heat exchanger; the gas inlet of the first-stage heat exchanger is communicated with the smoke outlet of the sulfur combustion furnace, the gas outlet of the first-stage heat exchanger is communicated with the gas inlet of the second-stage heat exchanger, the heat-conducting oil inlet of the first-stage heat exchanger is communicated with the outlet of the heating tube array, the heat-conducting oil outlet of the first-stage heat exchanger is communicated with the heat-conducting oil inlet of the third-stage heat exchanger, and the heat-conducting oil outlet of the third-stage heat exchanger is communicated with the inlet of the heating tube array through a heat-conducting oil pump; the gas outlet of the secondary heat exchanger is communicated with the lower part of the washing tower, the absorption liquid inlet of the secondary heat exchanger is communicated with the absorption liquid outlet of the acid liquid heat exchanger, the absorption liquid outlet of the secondary heat exchanger is communicated with the absorption liquid inlet of the tertiary heat exchanger, and the absorption liquid outlet of the tertiary heat exchanger is communicated with the upper part of the distillation tower.
And the primary heat exchanger is also communicated with a heat conduction oil buffer tank.
A foam catching tower is arranged between the absorption tower and the fan, the lower part of the foam catching tower is communicated with the lower part of the absorption tower, the top of the foam catching tower is communicated with an inlet of the fan, and the bottom of the foam catching tower is communicated with an absorption liquid tank.
A large amount of additional heat is generated in the combustion process of the sulfur, and the temperature at the sulfur dioxide outlet of the sulfur combustion furnace can reach over 600 ℃. Statistics show that the heat generated by burning sulfur dioxide per kilogram of sulfur is about 9278kJ, and the heat generated by burning sulfur per ton is about 9.278X 10 6 Heat in kJ; at present, about 0.5 ton of sulfur is consumed by one ton of products in bromine production, and the combustion heat release is about 4.639 multiplied by 10 6 kJ。
According to the method, the absorbing liquid containing hydrobromic acid is subjected to heat exchange with the waste heat of the sulfur combustion furnace and high-temperature sulfur dioxide fully through the heat exchange device, the temperature of the absorbing liquid can reach 80-90 ℃, the absorbing liquid enters the distillation tower and then reacts with chlorine to generate free bromine, heating by an external heat source is not needed, and the free bromine can be changed into bromine steam to flow out of the top opening of the distillation tower by means of the heat of the absorbing liquid; the whole distillation process does not need an external heat source, and the energy consumption can be reduced. In addition, the acid liquor flowing out of the bottom of the distillation tower also has heat, the absorption liquid can be preheated by using the acid liquor heat exchanger, and the acid liquor flowing out of the acid liquor heat exchanger also has heat and is used for vaporizing chlorine. Therefore, in the whole production process, the required heat comes from the heat generated by burning the sulfur, and an external heat source is not needed, so that the energy consumption can be greatly reduced.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
fig. 1 is a schematic diagram of the structural principle of a bromine extraction device.
Detailed Description
The invention provides bromine extraction equipment, which comprises a sulfur combustion furnace 1, a brine tank 2, a water washing tower 3, an absorption tower 4, a blow-off tower 5, an oxidation tower 6 and a distillation tower 7 according to the figure 1. The inner wall of the sulfur combustion furnace 1 is connected with a heating tube array (not shown in the figure, the heating tube array can be called a tube array heat exchanger as a common preheating utilization device of a boiler), and the heating tube array is communicated with a heat exchange device. The heat exchange device comprises a primary heat exchanger 23, a secondary heat exchanger 24 and a tertiary heat exchanger 25; the air inlet of the first-stage heat exchanger 23 is communicated with the smoke outlet of the sulfur combustion furnace 1, the air outlet of the first-stage heat exchanger is communicated with the air inlet of the second-stage heat exchanger 24, the heat conduction oil inlet of the first-stage heat exchanger 23 is communicated with the outlet of the heating tube array, the heat conduction oil outlet of the first-stage heat exchanger is communicated with the heat conduction oil inlet of the third-stage heat exchanger 25, and the heat conduction oil outlet of the third-stage heat exchanger 25 is communicated with the inlet of the heating tube array through the heat conduction oil pump 26. An air outlet of the secondary heat exchanger 24 is communicated with the lower part of the water washing tower 3, an absorption liquid inlet of the secondary heat exchanger 24 is communicated with an absorption liquid outlet of the acid liquid heat exchanger 16, an absorption liquid outlet is communicated with an absorption liquid inlet of the tertiary heat exchanger 25, and an absorption liquid outlet of the tertiary heat exchanger 25 is communicated with the upper part of the distillation tower 7. The bottom of the water washing tower 3 is communicated with the sedimentation tank 8, the upper part of the water washing tower 3 is communicated with the outlet of the water pump 9, and the inlet of the water pump 9 is communicated with the sedimentation tank 8; the brine tank 2 is communicated with a water inlet of the oxidation tower 6 through a brine pump 10 and a brine pipe 11, a water outlet of the oxidation tower 6 is communicated with the upper part of the blow-off tower 5, the top of the blow-off tower 5 is communicated with the top of the absorption tower 4 through an air communicating pipe 12, and the top of the washing tower 3 and an outlet of the water pump 9 are communicated with the air communicating pipe 12; the bottom of the absorption tower 4 is communicated with an absorption liquid tank 13, the lower part of the absorption tower is communicated with an inlet of a fan 14, and an outlet of the fan 14 is communicated with the lower part of the blow-off tower 5; the absorption liquid tank 13 is communicated with an absorption liquid inlet 16 of the acid liquid heat exchanger through an absorption liquid delivery pump 15, the top of the distillation tower 7 is communicated with a condenser 17, the condenser 17 is communicated with a bromine tank 18, the bottom of the distillation tower 7 is communicated with an acid liquid tank 19, the acid liquid tank 19 is communicated with an acid liquid inlet of the acid liquid heat exchanger 16 through an acid liquid delivery pump 20, an acid liquid outlet of the acid liquid heat exchanger 16 is communicated with an acid liquid inlet of a chlorine vaporizer 29, an acid liquid outlet brine pipe 11 of the chlorine vaporizer 29 is communicated, an air inlet of the acid liquid heat exchanger 16 is communicated with a chlorine storage tank 21, an air outlet of the acid liquid heat exchanger 16 is communicated with an air inlet 22 of a chlorine buffer tank, and an air outlet of the chlorine buffer tank 22 is communicated with the lower part of the distillation tower 7 and the brine pipe 11. In order to discharge the acidified brine after bromine blowing, a liquid outlet is arranged at the bottom of the blowing tower 5. The first-stage heat exchanger 23 is also communicated with a heat conduction oil buffer tank 27, and a proper amount of heat conduction oil is added into the heat conduction oil buffer tank 27, so that volume changes of the heat conduction oil flowing through the first-stage heat exchanger, the third-stage heat exchanger and the heating tube nest due to temperature changes can be buffered. In order to prevent the bromine-removed air from being mixed with the absorption liquid to enter the fan, a foam capturing tower 28 is arranged between the absorption tower 4 and the fan 14, the lower part of the foam capturing tower 28 is communicated with the lower part of the absorption tower 4, the top of the foam capturing tower 28 is communicated with the inlet of the fan, and the bottom of the foam capturing tower 28 is communicated with the absorption liquid tank 13. The connection pipeline for connecting each part in the bromine extraction equipment can be connected with a control valve according to the use requirement, and the use and installation of the control valve are conventional technical means, which are not described again.
Referring to fig. 1, the bromine extraction method of the present invention will be described in detail below with reference to the above bromine extraction apparatus. When the equipment initially operates, part of pre-acidified brine is conveyed into the oxidation tower 6 through the brine pump 10 and the brine pipe 11, chlorine is input into the brine pipe 11 through the chlorine storage tank 21, the chlorine vaporizer 29 and the chlorine buffer tank 22 in the conveying process, and bromide ions in the brine in the oxidation tower are oxidized into free bromine, so that oxidized brine is prepared; under the action of a brine pump 10, the oxidized brine is sprayed downwards from the top of the blow-off tower 5 to form a liquid film on the surface of the filler in the blow-off tower; meanwhile, air is blown upwards from the bottom of the blow-off tower 5 through a fan 14 to make the air fully contact with the oxidized brine so as to resolve free bromine and diffuse the free bromine into the air to form bromine-containing air, and the bromine-containing air is blown out from the upper part of the blow-off tower and enters an air communicating pipe 12; when bromine-containing air is formed, sulfur is combusted in the sulfur combustion furnace 1 to generate high-temperature sulfur dioxide gas, the sulfur dioxide gas flows into the first-stage heat exchanger 23 to exchange heat with heat conduction oil, primary cooling is carried out, the cooled sulfur dioxide gas flows into the second-stage heat exchanger 24 to carry out secondary cooling, the heat conduction oil in the first-stage heat exchanger enters the third-stage heat exchanger 25 under the action of the heat conduction oil pump 26 to exchange heat and then enters the heating tube nest and then enters the first-stage heat exchanger 23, and the heat conduction oil circularly and repeatedly flows in the heating tube nest, the first-stage heat exchanger 23 and the third-stage heat exchanger 25 under the action of the heat conduction oil pump 26 to continuously absorb heat and exchange heat. The sulfur dioxide gas of secondary cooling flows into the scrubbing tower 3, water pump 9 extracts the water in the sedimentation tank 8 and washes the sulfur dioxide gas to remove sulfur particles or other impurities which are not burnt to the full, the washing water flows back to the sedimentation tank 8 from the bottom of the scrubbing tower 3, the sulfur dioxide gas after washing flows out from the top of the scrubbing tower 3 and enters the air communicating pipe 12, meanwhile, except one part of the water extracted by the water pump 9 is used for washing the sulfur dioxide gas, the other part of the water enters the air communicating pipe 12. The sulfur dioxide gas is mixed with water in the air communicating pipe 12 to form a sulfur dioxide aqueous solution, the sulfur dioxide aqueous solution and bromine-containing air enter the top of the absorption tower 4 and flow downwards, under the action of filler in the absorption tower 4, the sulfur dioxide aqueous solution and the bromine-containing air are fully contacted, bromine in the bromine-containing air enters the sulfur dioxide aqueous solution to form absorption liquid containing hydrobromic acid, the absorption liquid flows out from the bottom of the absorption tower 4 to the absorption liquid tank 13, the bromine-containing air becomes bromine-removing air, the bromine-removing air flows out from the lower part of the absorption tower 4 under the action of the fan 14 and enters the lower part of the foam capturing tower 28, after the absorption liquid containing the bromine is removed by the foam capturing tower 28, the bromine-removing air returns to the inlet of the fan 14 through the top of the foam capturing tower 28 and is sent to the blowing tower by the fan for blowing out of the bromine. The absorption liquid at the bottom of the mist capturing tower 28 also enters the absorption liquid tank 13; under the action of an absorption liquid delivery pump 15, absorption liquid flow in the absorption liquid tank 13 firstly flows through an acid liquid heat exchanger 16 to be preheated, then enters a secondary heat exchanger 24 to exchange heat with sulfur dioxide gas flowing through the secondary heat exchanger 24, namely, absorption liquid is heated for the first time, the absorption liquid flows out of the secondary heat exchanger 24 and then enters a tertiary heat exchanger 25 to exchange heat with heat conduction oil flowing through the tertiary heat exchanger 25 so as to finish secondary heating, the temperature of the absorption liquid after secondary heating can reach 80-90 ℃, the absorption liquid flows out of the tertiary heat exchanger 25 and then enters a distillation tower 7, in the process that the absorption liquid flows downwards from the upper part of the distillation tower 7, chlorine gas enters the distillation tower 7 from the lower part of the distillation tower 7, the absorption liquid and the chlorine gas are fully contacted in a packing in the distillation tower 7, hydrobromic acid in the absorption liquid reacts with the chlorine gas to generate hydrogen chloride and free bromine, the free bromine is evaporated under the action of the self heat of the absorption liquid to form bromine vapor, the bromine vapor flows out of the top of the distillation tower and enters a condenser 17, and is cooled to form a final product bromine and then enters a bromine storage tank 18. The hydrogen chloride is changed into acid liquor when meeting water, the acid liquor flows out from the bottom of the distillation tower and enters the acid liquor tank 19, under the action of the acid liquor delivery pump 20, the acid liquor in the acid liquor tank 19 enters the acid liquor heat exchanger 16 to preheat absorption liquid flowing into the acid liquor heat exchanger, the acid liquor flowing out of the acid liquor heat exchanger 16 flows through the chlorine vaporizer 29 for chlorine vaporization, and the acid liquor flowing out of the chlorine vaporizer 29 flows into the brine pipe 11 for brine acidification; chlorine gas flowing out of the chlorine gas vaporizer 29 enters the chlorine gas buffer tank 22, one part of the chlorine gas flowing out of the chlorine gas buffer tank 22 enters the distillation tower 7 for reacting with hydrobromic acid in the absorption liquid, and the other part of the chlorine gas flows into the brine pipe 11 for oxidizing acidified brine.
The bromine extraction process is a continuous production process, except that brine needs to be acidified in advance in the initial stage, during normal operation, the brine in the brine tank 2 does not need to be acidified and is directly conveyed to the oxidation tower 6 through the brine pump 10 and the brine pipe 11, under the action of the acid conveying pump 20, acid liquid in the acid liquid tank 19 flows through the acid liquid heat exchanger 16 and the chlorine vaporizer 29 and then enters the brine pipe 11, the acid liquid is used for acidifying brine, and if the acidification degree is not enough, acid can be properly supplemented into the acid liquid tank 19 during operation. The bromine extraction process fully utilizes the heat generated by the combustion of the sulfur to produce the bromine, does not need to use an external heat source, and can greatly reduce the energy consumption.
Claims (5)
1. A method for extracting bromine in brine is characterized in that: the method is realized by bromine extraction equipment, and comprises the following steps:
(1) Mixing the acidified brine and chlorine gas, feeding the mixture into an oxidation tower, and oxidizing bromide ions into free bromine to obtain oxidized brine; spraying the oxidized brine from the top of the blow-off tower downwards to form a liquid film on the surface of the filler in the blow-off tower; simultaneously, blowing air upwards from the bottom of the blow-off tower through a fan to ensure that the air is fully contacted with the oxidized brine so as to resolve free bromine and diffuse the free bromine into the air to form bromine-containing air, and blowing the bromine-containing air out of the upper part of the blow-off tower; when the bromine-containing air is formed, the sulfur is combusted in the sulfur combustion furnace to generate high-temperature sulfur dioxide gas, and the sulfur dioxide gas flows through the heat exchange device to be cooled and then enters the water washing tower to be washed and dedusted;
(2) Mixing bromine-containing air, the sulfur dioxide gas after dust removal and purified sulfur dioxide washing water, and feeding the mixture into an absorption tower, wherein bromine in the bromine-containing air enters a sulfur dioxide aqueous solution to form an absorption liquid containing hydrobromic acid, the bromine-containing air becomes bromine-removed air, the absorption liquid flows out of the bottom of the absorption tower to an absorption liquid tank, and the bromine-removed air returns to the inlet of a fan and is fed into a blowing tower by the fan for blowing out bromine;
(3) The absorption liquid in the absorption liquid tank passes through an acid liquor heat exchanger and a heat exchange device to form liquid with the temperature of more than 60 ℃, the liquid enters a distillation tower, hydrobromic acid in the absorption liquid reacts with chlorine gas entering the distillation tower to generate hydrogen chloride and free bromine, the free bromine is evaporated into bromine steam under the action of the heat of the absorption liquid, and the bromine steam flows out of the distillation tower and is cooled to form a final product bromine; the chlorine hydride is changed into acid liquor when meeting water, the acid liquor flows out of the distillation tower part and then flows through the acid liquor heat exchanger to preheat absorption liquid flowing into the acid liquor heat exchanger, the acid liquor flowing out of the acid liquor heat exchanger flows through the chlorine vaporizer for chlorine vaporization, and the acid liquor flowing out of the chlorine vaporizer is used for acidification of brine; a part of the chlorine gas flowing out of the chlorine gas vaporizer enters a distillation tower to be used for reacting with hydrobromic acid, and the other part of the chlorine gas is used for oxidizing acidified brine.
2. The method of extracting bromine from brine as claimed in claim 1, wherein: the bromine extraction equipment comprises a sulfur combustion furnace (1), a brine tank (2), a water washing tower (3), an absorption tower (4), a blow-off tower (5), an oxidation tower (6) and a distillation tower (7); a heating tube array is arranged in the sulfur combustion furnace (1), the heating tube array is communicated with a heat exchange device, an air inlet of the heat exchange device is communicated with a smoke outlet of the sulfur combustion furnace (1), an air outlet of the heat exchange device is communicated with the lower part of the water washing tower (3), the bottom of the water washing tower (3) is communicated with the sedimentation tank (8), the upper part of the water washing tower (3) is communicated with an outlet of a water pump (9), and an inlet of the water pump (9) is communicated with the sedimentation tank (8); the brine tank (2) is communicated with a water inlet of the oxidation tower (6) through a brine pump (10) and a brine pipe (11), a water outlet of the oxidation tower (6) is communicated with the upper part of the blow-off tower (5), the top of the blow-off tower (5) is communicated with the top of the absorption tower (4) through an air communicating pipe (12), and the top of the washing tower (3) and an outlet of the water pump (9) are communicated with the air communicating pipe (12); the bottom of the absorption tower (4) is communicated with an absorption liquid tank (13), the lower part of the absorption tower is communicated with an inlet of a fan (14), and an outlet of the fan (14) is communicated with the lower part of the blow-out tower (5); an absorption liquid tank (13) is communicated with an absorption liquid inlet of an acid liquid heat exchanger (16) through an absorption liquid delivery pump (15), an absorption liquid outlet of the acid liquid heat exchanger (16) is communicated with an absorption liquid inlet of a heat exchange device, an absorption liquid outlet of the heat exchange device is communicated with the upper part of a distillation tower (7), the top of the distillation tower (7) is communicated with a condenser (17), the condenser (17) is communicated with a bromine tank (18), the bottom of the distillation tower (7) is communicated with an acid liquid tank (19), the acid liquid tank (19) is communicated with an acid liquid inlet of the acid liquid heat exchanger (16) through an acid liquid delivery pump (20), an acid liquid outlet of the acid liquid heat exchanger (16) is communicated with an acid liquid inlet of a chlorine vaporizer, an acid liquid outlet of the chlorine vaporizer is communicated with a brine pipe (11), an air inlet of the chlorine vaporizer is communicated with a chlorine gas storage tank (21), an air outlet of the chlorine vaporizer is communicated with an air inlet of a chlorine gas buffer tank (22), and an air outlet of the chlorine buffer tank (22) is communicated with the lower part of the distillation tower (7) and the brine pipe (11).
3. The method of extracting bromine from brine as claimed in claim 2, wherein: the heat exchange device comprises a primary heat exchanger (23), a secondary heat exchanger (24) and a tertiary heat exchanger (25); the air inlet of the primary heat exchanger (23) is communicated with the smoke outlet of the sulfur combustion furnace (1), the air outlet is communicated with the air inlet of the secondary heat exchanger (24), the heat-conducting oil inlet of the primary heat exchanger (23) is communicated with the outlet of the heating tube array, the heat-conducting oil outlet is communicated with the heat-conducting oil inlet of the tertiary heat exchanger (25), and the heat-conducting oil outlet of the tertiary heat exchanger (25) is communicated with the inlet of the heating tube array through a heat-conducting oil pump (26); the gas outlet of the secondary heat exchanger (24) is communicated with the lower part of the water washing tower (3), the absorption liquid inlet of the secondary heat exchanger (24) is communicated with the absorption liquid outlet of the acid liquid heat exchanger (16), the absorption liquid outlet is communicated with the absorption liquid inlet of the tertiary heat exchanger (25), and the absorption liquid outlet of the tertiary heat exchanger (25) is communicated with the upper part of the distillation tower (7).
4. The method of extracting bromine from brine as claimed in claim 2 wherein: the primary heat exchanger (23) is also communicated with a heat conducting oil buffer tank (27).
5. The method for extracting bromine from brine according to any one of claims 2 to 4, wherein: a foam catching tower (28) is arranged between the absorption tower (4) and the fan (14), the lower part of the foam catching tower (28) is communicated with the lower part of the absorption tower (4), the top of the foam catching tower is communicated with an inlet of the fan, and the bottom of the foam catching tower is communicated with the absorption liquid tank (13).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117430089A (en) * | 2023-12-20 | 2024-01-23 | 山东菜央子盐场有限公司 | Method for extracting bromine from brine by gaseous membrane method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826954A (en) * | 2012-09-06 | 2012-12-19 | 山东天一化学股份有限公司 | Preparation method for bromoalkane |
| CN104229739A (en) * | 2014-10-09 | 2014-12-24 | 山东天一化学股份有限公司 | Processing method for extracting bromine from brine by composite blowing and absorbing method |
| CN104383801A (en) * | 2014-11-04 | 2015-03-04 | 江西瑞林稀贵金属科技有限公司 | Method and system for treating electronic scrap smoke |
| CN205999009U (en) * | 2016-08-31 | 2017-03-08 | 山东裕源集团有限公司 | A kind of bromine production system |
-
2022
- 2022-09-29 CN CN202211202788.5A patent/CN115557468A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826954A (en) * | 2012-09-06 | 2012-12-19 | 山东天一化学股份有限公司 | Preparation method for bromoalkane |
| CN104229739A (en) * | 2014-10-09 | 2014-12-24 | 山东天一化学股份有限公司 | Processing method for extracting bromine from brine by composite blowing and absorbing method |
| CN104383801A (en) * | 2014-11-04 | 2015-03-04 | 江西瑞林稀贵金属科技有限公司 | Method and system for treating electronic scrap smoke |
| CN205999009U (en) * | 2016-08-31 | 2017-03-08 | 山东裕源集团有限公司 | A kind of bromine production system |
Non-Patent Citations (1)
| Title |
|---|
| 张琳娜;刘有智;焦纬洲;申红艳;: "卤水提溴技术的发展与研究现状", 盐湖研究, no. 01 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117430089A (en) * | 2023-12-20 | 2024-01-23 | 山东菜央子盐场有限公司 | Method for extracting bromine from brine by gaseous membrane method |
| CN117430089B (en) * | 2023-12-20 | 2024-04-16 | 山东菜央子盐场有限公司 | Method for extracting bromine from brine by gaseous membrane method |
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