Device for extracting bromine and preparing mirabilite from concentrated high-mirabilite liquid

Abstract

The utility model relates to the technical field of bromine extraction and mirabilite preparation equipment, in particular to a concentrated high-nitrate liquid bromine extraction and mirabilite preparation device, which comprises a hot blowing device, a condensing device, a nitrate extraction device, a bromine-water separation device and a bromine storage barrel, the bromine output end of the hot blowing device is connected with the input end of the condensing device; the saltpeter output end of the hot blowing device is connected with the input end of the saltpeter extraction device; a liquid outlet of the condensing device is connected with an input end of the bromine-water separating device; the input end of the bromine storage barrel is connected with the bromine output end of the bromine-water separation device, bromine in concentrated high-nitrate liquid or bromine contained in waste liquid after bromine extraction can be extracted by utilizing a method of the hot blowing device, the utilization rate of brine resources is improved, and after the hot blowing device is combined with the bromine extraction device, the utilization rate of the brine resources is improved. The concentrated bromine-containing high-saltpeter liquid can be used for producing saltpeter, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bromine and equipment technology field of making mirabilite, especially to a kind of concentrated high nitre liquid bromine extraction and preparation of mirabilite device. BACKGROUND

[0002] Bromine resource, the natural resource of bromine mainly exists in seawater, underground concentrated brine, rock salt mine and salt lake water.My country annual output of bromine is 10-12 million tons, annual demand is 180 thousand tons, and 50-60 thousand tons gap every year generates the demand of resource extraction.At present, bromine extraction method has two commonly used methods of water vapor distillation and air blowing method as well as membrane separation method, ion exchange resin method, electrolysis and various methods.Water vapor distillation is suitable for high concentration bromine liquid bromine extraction, however, the extraction rate of bromine is low, and the residual bromine content in liquid is high, the yield of air blowing method for bromine extraction is not higher than 80%, and the residual bromine content in liquid is high, which affects the comprehensive utilization of liquid.

[0003] Concentrated high nitre liquid is high nitre liquid of multi-effect evaporation terminal discharge or external discharge in the production process of salt nitre, impurity content in concentrated high nitre liquid is concentrated by 10-20 times, the content of sulfate radical in concentrated high nitre liquid is too high, the treatment efficiency is low by using nanofiltration membrane, most enterprises adopt recovery purification system and external discharge back to well halogen extraction process, however, there are still some problems, such as: high nitre liquid recovery purification system affects the content of sulfuric acid in brine, which fluctuates greatly and is not easy to control, SO4 2 Content rises, which will affect the quality of product, and in the process of pipeline transportation, long distance long-term transportation of the liquid will cause pipeline crystallization and even pipe blockage, if not treated, it will cause serious environmental pollution, lead to water acidification, pH reduction, and further damage soil structure, and produce adverse consequences.There are many problems, how to comprehensively utilize it is a difficult problem in the industry. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is: in order to overcome the problems of impurity removal in high nitre liquid and preparation of sodium sulfate and production condition limitation, a concentrated high nitre liquid bromine extraction and preparation of mirabilite device is provided.

[0005] The technical scheme adopted by the utility model to solve its technical problem is: a concentrated high nitre liquid bromine extraction and preparation of mirabilite device, which comprises a hot blowing device, a condensing device, a nitre extraction device, a bromine water separation device and a bromine storage barrel, the hot blowing device is used for extracting bromine in bromine-containing liquid output by the primary extraction device, the bromine output end of the hot blowing device is connected with the input end of the condensing device, and the condensing device is used for cooling bromine-containing flue gas output by the hot blowing device, so that the bromine-containing flue gas is condensed into liquid;

[0006] The nitre output end of the hot blowing device is connected with the input end of the nitre extraction device, and the nitre extraction device is used for extracting nitre in solution;

[0007] The bromine water separation device is used for separating bromine and water, a liquid outlet of the condensing device is connected with an input end of the bromine water separation device;

[0008] The bromine storage barrel is used for storing bromine, an input end of the bromine storage barrel is connected with a bromine output end of the bromine water separation device, and the method of the heat blowing device can extract bromine from concentrated high-nitrate liquid or bromine contained in waste liquid after bromine extraction, thereby improving utilization of brine resources, and after being combined with the nitrate extraction device, the concentrated high-nitrate liquid containing bromine can be used to produce mirabilite, thereby improving production efficiency.

[0009] Further, the device further comprises a tail gas absorption device, a gas output end of the condensing device is connected with a gas input end of the tail gas absorption device.

[0010] Further, the device further comprises a drying device, an input end of the drying device is connected with a bromine output end of the bromine water separation device, and an output end of the drying device is connected with an input end of the bromine storage barrel, and the drying device is used for removing water vapor in the bromine.

[0011] Further, a waste liquid output end of the bromine water separation device is connected with a raw material input end of the heat blowing device.

[0012] Further, the heat blowing device comprises a fan, a heater and a tower body, the tower body is used for containing bromine-containing nitrate liquid, an output end of the fan is connected with a gas input end of the tower body, the fan is used for inputting air into the tower body, a liquid input end of the tower body is connected with an output end of the bromine-containing nitrate liquid outlet, a gas output end of the tower body is connected with a gas input end of the condensing device, the heater is arranged in the tower body, the heater is used for heating air output by the fan, and the tower body is provided with a chlorine input end.

[0013] Further, the condensing device comprises a first condenser and a second condenser arranged at intervals, a gas input end of the first condenser is connected with a gas output end of the heat blowing device, a gas output end of the first condenser is connected with a gas input end of the second condenser, and a liquid output end of the first condenser is connected with an input end of the bromine water separation device;

[0014] A liquid output end of the second condenser is connected with an input end of the bromine water separation device.

[0015] Further, a condensing water output end of the nitrate extraction device is connected with a condensing medium input end of the condensing device.

[0016] The device has the advantages that the device can extract bromine from concentrated high nitrate liquid or waste liquid after extracting bromine, improves the utilization rate of brine resources, and can be used for producing mirabilite by using the concentrated high nitrate liquid containing bromine, thereby improving the production efficiency, improving the purity of bromine on one hand, and preparing mirabilite on the other hand. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further described below in combination with the drawings and examples.

[0018] Figure 1 The device is a structural schematic view of the utility model.

[0019] In the figure, 1 is a hot blowing device, 11 is a fan, 12 is a heater, 13 is a tower body, 2 is a condensing device, 21 is a first condenser, 22 is a second condenser, 3 is a nitrate extracting device, 4 is a bromine water separating device, 5 is a bromine storage barrel, 6 is a tail gas absorbing device, and 7 is a drying device. DETAILED DESCRIPTION

[0020] The utility model is further described below in combination with the drawings and examples.

[0021] As Figure 1 The device is a structural schematic view of the utility model, and the device for extracting bromine from concentrated high nitrate liquid and preparing mirabilite comprises a hot blowing device 1, a condensing device 2, a nitrate extracting device 3, a bromine water separating device 4 and a bromine storage barrel 5, the hot blowing device 1 is used for extracting bromine in bromine-containing liquid output by a primary extracting device, the bromine output end of the hot blowing device 1 is connected with the input end of the condensing device 2, and the condensing device 2 is used for cooling bromine-containing flue gas output by the hot blowing device 1, so that the bromine-containing flue gas is condensed into liquid.

[0022] The hot blowing device 1 comprises a fan 11, a heater 12 and a tower body 13, the tower body 13 is used for containing bromine-containing nitrate liquid, the output end of the fan 11 is connected with the gas input end of the tower body 13, the fan 11 is used for inputting air into the tower body 13, the liquid input end of the tower body 13 is connected with the output end of the bromine-containing nitrate liquid outlet, the gas output end of the tower body 13 is connected with the gas input end of the condensing device 2, the heater 12 is arranged in the tower body 13, the heater 12 is used for heating air output by the fan 11, the tower body 13 is provided with a chlorine input end and a raw material input end, the raw material is concentrated bromine-containing high nitrate liquid, and the PH of the raw material is adjusted by using an acid, the device is provided with a micro-nano bubble disc for inputting chlorine, and a large bubble device is provided for inputting air.

[0023] The condensing device 2 comprises a first condenser 21 and a second condenser 22 arranged at intervals, the gas input end of the first condenser 21 is connected with the gas output end of the hot blowing device 1, the gas output end of the first condenser 21 is connected with the gas input end of the second condenser 22, the liquid output end of the first condenser 21 is connected with the input end of the bromine water separation device 4; the liquid output end of the second condenser 22 is connected with the input end of the bromine water separation device 4, the main function of the condenser is to transfer the heat of the hot fluid to the cold fluid, thereby reducing the temperature of the hot fluid, and the condensing device 2 has tooth-shaped heat exchange pipes.

[0024] The nitrate output end of the hot blowing device 1 is connected with the input end of the nitrate extraction device 3, and the nitrate extraction device 3 is used for extracting nitrate in the solution.

[0025] The nitrate extraction device generally comprises the following main parts: a pre-cooling system for pre-cooling the mother liquor to a certain temperature to reduce the energy consumption in the subsequent cooling process; a heat exchanger which is the core component of the cooling process, which continuously reduces the temperature of the solution to make it reach a supersaturated state and precipitate crystals; a crystallizer which provides space and time for crystal growth to ensure that the crystals can grow fully; a separation system for separating the crystals from the mother liquor to obtain pure mirabilite products; and a control system for monitoring and controlling the entire freezing nitrate extraction process to ensure process stability and reliable product quality.

[0026] The bromine water separation device 4 is used for separating bromine and water, the liquid outlet of the condensing device 2 is connected with the input end of the bromine water separation device 4, and the bromine water separation device generally comprises the following main parts: an extraction device for mixing bromine water with an extractant to transfer bromine from water to the extractant, common extraction devices include separatory funnels, stirrers, etc.; a separation device for separating the mixture after extraction to obtain an extractant layer containing bromine and a water layer containing a small amount of bromine, common separation devices include separatory funnels, centrifuges, etc.; a recovery device for recovering and purifying bromine in the extractant, common recovery devices include distillation devices, rectifying columns, etc., and the waste liquid generated by the bromine water separation device 4 can be returned to the hot blowing device 1 for further extraction and utilization.

[0027] The bromine storage barrel 5 is used for storing bromine, the input end of the bromine storage barrel 5 is connected with the bromine output end of the bromine water separation device 4, and the method of the hot blowing device can extract bromine from the concentrated high-nitrate liquid or the waste liquid after bromine extraction, thereby improving the utilization rate of brine resources, and in combination with the nitrate extraction device, the concentrated high-nitrate liquid containing bromine can be used for producing mirabilite, thereby improving the production efficiency.

[0028] The device further comprises a tail gas absorption device 6, a gas output end of the condensing device 2 is connected with a gas input end of the tail gas absorption device 6, the tail gas absorption device 6 mainly comprises a gas inlet, a filter pipe, a connecting plate, a dissolving tank, a connecting pipe and the like, the tail gas absorption device 6 is used for purifying the gas so that the gas can be discharged harmlessly, and a micro-nano gas disc is installed in the tail gas absorption device 6.

[0029] The device further comprises a drying device 7, an input end of the drying device 7 is connected with a bromine output end of the bromine water separation device 4, and an output end of the drying device 7 is connected with an input end of the bromine storage barrel 5, the drying device 7 is used for removing water vapor in the bromine.

[0030] A waste liquid output end of the bromine water separation device 4 is connected with a raw material input end of the hot blowing device 1, a reflux unit is formed, and the waste liquid can be used for extraction again.

[0031] Based on the above ideal embodiment of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A device for concentrating high nitre liquor to obtain bromine and mirabilite, characterized in that, The device comprises a hot blowing device (1), a condensing device (2), a nitrate extracting device (3), a bromine water separating device (4) and a bromine storage barrel (5), the hot blowing device (1) is used for extracting bromine in bromine-containing liquid output by a primary extracting device, a bromine output end of the hot blowing device (1) is connected with an input end of the condensing device (2), the condensing device (2) is used for cooling bromine-containing gas output by the hot blowing device (1) so that the bromine-containing gas is condensed into liquid; a nitrate output end of the hot blowing device (1) is connected with an input end of the nitrate extracting device (3), the nitrate extracting device (3) is used for extracting nitrate in solution; the bromine water separating device (4) is used for separating bromine and water, a liquid outlet of the condensing device (2) is connected with an input end of the bromine water separating device (4); the bromine storage barrel (5) is used for storing bromine, an input end of the bromine storage barrel (5) is connected with a bromine output end of the bromine water separating device (4).

2. The device for extracting bromine and preparing mirabilite from concentrated high-nitrate solution according to claim 1, characterized in that: The device further comprises a tail gas absorbing device (6), a gas output end of the condensing device (2) is connected with a gas input end of the tail gas absorbing device (6).

3. The device for extracting bromine and preparing mirabilite from concentrated high-nitrate solution according to claim 1, characterized in that: The device further comprises a drying device (7), an input end of the drying device (7) is connected with a bromine output end of the bromine water separating device (4), an output end of the drying device (7) is connected with an input end of the bromine storage barrel (5), the drying device (7) is used for removing water vapor in bromine.

4. The device for extracting bromine and preparing mirabilite from concentrated high-nitrate solution according to claim 1, characterized in that: a waste liquid output end of the bromine water separating device (4) is connected with a raw material input end of the hot blowing device (1).

5. The device for extracting bromine and preparing mirabilite from concentrated high-nitrate solution according to claim 1, characterized in that: The hot blowing device (1) comprises a fan (11), a heater (12) and a tower body (13), the tower body (13) is used for containing bromine-containing nitrate liquid, an output end of the fan (11) is connected with a gas input end of the tower body (13), the fan (11) is used for inputting air into the tower body (13), a liquid input end of the tower body (13) is connected with an output end of a bromine-containing nitrate liquid outlet, a gas output end of the tower body (13) is connected with a gas input end of the condensing device (2), the heater (12) is arranged in the tower body (13), the heater (12) is used for heating air output by the fan (11), the tower body (13) is provided with a chlorine input end.

6. The device for extracting bromine and preparing mirabilite from concentrated high-nitrate solution according to claim 1, characterized in that: The condensing device (2) comprises a first condenser (21) and a second condenser (22) arranged at intervals, a gas input end of the first condenser (21) is connected with a gas output end of the hot blowing device (1), a gas output end of the first condenser (21) is connected with a gas input end of the second condenser (22), a liquid output end of the first condenser (21) is connected with an input end of the bromine water separating device (4); a liquid output end of the second condenser (22) is connected with an input end of the bromine water separating device (4).

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