Equipment and method for extracting hydrobromic acid by utilizing bromine-containing wastewater

Abstract

The invention discloses equipment and a method for extracting hydrobromic acid by using bromine-containing wastewater, the equipment comprises an outer cylinder tank, an inner cylinder tank and a sealing cover located above the inner cylinder tank and used for sealing, a heating pipe is arranged between the outer cylinder tank and the inner cylinder tank, and the heating pipe is fixedly installed on the outer surface of the inner cylinder tank in a surrounding mode. As the transmission shaft penetrates through the centers of the separation basket and the centrifugal box to drive the separation basket and the centrifugal box to rotate and operate in the inner cylinder tank, when the centrifugal box rotates, the centrifugal force enables the opening and closing plate to overcome the elastic force of the elastic piece to be opened, an internal calcium salt reactant falls into the bromine-containing wastewater, and the separation basket rotates to enable the inclined plate to disturb a solution, so that the reactant and the bromine-containing wastewater are fully mixed; in the mixing process, the bromine-containing wastewater is heated by the heating pipe, the reaction is facilitated to be promoted, the position control of the separation basket in different stages is realized through the matching of structures such as an inclined plate, a guide thread and a guide groove, and the smooth reaction and separation process is ensured.

Description

Technical Field

[0001] The invention relates to the field of bromine water treatment equipment, in particular to equipment and a method for extracting hydrobromic acid from bromine-containing wastewater. Background Art

[0002] Since the waste liquid generated in the bromine production industry contains a large amount of bromine and has a very high recycling value, the main function of the bromine-containing wastewater extraction hydrobromic acid equipment is to treat the wastewater containing bromide ions and extract the bromide ions through specific technical means. Such equipment is mainly used for environmental protection and resource recovery purposes. By extracting hydrobromic acid from bromine-containing wastewater, it can avoid pollution to the environment, and at the same time realize the recycling of valuable substances in the wastewater, reducing production costs.

[0003] In the process of treating bromine-containing wastewater, a variety of technical means are usually used, including chemical precipitation, adsorption, ion exchange and biological treatment. The chemical precipitation method adds specific reactants to promote the reaction of bromide ions with it to form insoluble precipitates. However, the existing reactants have relatively low efficiency in combining with wastewater, which means that during the reaction process, a large amount of reactants cannot effectively combine with bromide ions, resulting in a low yield of hydrobromic acid. Secondly, the cost of this method is relatively high, which is mainly due to the large consumption of reactants and the complexity of subsequent treatment. In addition, the generated precipitates also have certain difficulties in subsequent treatment. These precipitates are not convenient for the extraction and purification of hydrobromic acid, which further increases the complexity and cost of the operation.

[0004] To this end, a device and method for extracting hydrobromic acid from bromine-containing wastewater are proposed. Summary of the invention

[0005] The object of the present invention is to provide a device and method for extracting hydrobromic acid from bromine-containing wastewater, so as to solve the problem that the existing reactants proposed in the above background technology have relatively low efficiency in combining with wastewater, which means that during the reaction process, a large amount of reactants cannot effectively combine with bromide ions, resulting in a low yield of hydrobromic acid. In addition, the generated precipitates also have certain difficulties in subsequent treatment. These precipitates are not convenient for the extraction and purification of hydrobromic acid, further increasing the complexity and cost of the operation.

[0006] To achieve the above object, the present invention provides the following technical solutions: A device for extracting hydrobromic acid from bromine-containing wastewater comprises an outer cylinder tank and an inner cylinder tank, and a sealing cover for sealing located above the inner cylinder tank, a heating pipe is arranged between the outer cylinder tank and the inner cylinder tank, and the heating pipe is fixedly mounted around the outer surface of the inner cylinder tank, a centrifugal pump is fixedly mounted above the sealing cover, and a servo motor powered by an external power supply is fixedly mounted above the centrifugal pump, a transmission shaft is installed through the middle of the sealing cover, and the transmission shaft passes through the center of the centrifugal pump and is transmission-connected to the servo motor, a separation basket is movably mounted on the inner side of the inner cylinder tank, and the transmission shaft passes through the center of the separation basket, an inclined plate is fixedly connected equidistantly below the separation basket, a guide groove is arranged on the other end of the transmission shaft, and a guide thread matching the guide groove is arranged at the center of the separation basket; A centrifugal box is fixedly installed on one end of the transmission shaft, and the transmission shaft runs through the center of the centrifugal box. A plurality of opening and closing plates are movably installed on the inner side of the centrifugal box at the lower end of the centrifugal box, and a push block is fixedly connected to one end of the opening and closing plates, an elastic member is fixedly connected to one side of the push block, and the other side of the elastic member is fixedly connected to the centrifugal box, a fitting plate is provided on one side of the centrifugal box, and the fitting plate is fitted and connected to the inner cylinder tank, a sealing plate is movably fitted on the inner side of the fitting plate, and the sealing plate is sealed in contact with the inner surface of the inner cylinder tank.

[0007] In the above scheme, preferably, a support base is fixedly installed under the outer cylinder tank, a groove is provided on one side of the outer cylinder tank and the support base, and a bromine concentration detector and a heater are provided in the groove, the bromine concentration detector is set to detect the solution inside the inner cylinder tank through an opening provided on the inner cylinder tank, and the heater is fixedly installed on the outer surface of the inner cylinder tank and is electrically connected to the heating tube.

[0008] In the above scheme, preferably, at least three supporting feet are fixedly installed below the supporting base, and an electric valve is provided in the middle of the supporting feet. The electric valve is fixedly installed at the bottom of the supporting base and is connected to the inner cylinder tank.

[0009] In the above scheme, preferably, connecting shafts are fixedly installed at equal intervals on the outer side of the inner cylinder tank, a plurality of clamping columns are movably installed in the middle of the connecting shafts, and the clamping columns are connected to the sealing cover by buckles through the connecting shafts.

[0010] In the above scheme, preferably, handles are symmetrically fixedly installed on both sides of the sealing cover, and the handles are arranged between the clamping columns. A connecting hole is penetrated in the middle of the sealing cover, and the transmission shaft passes through the connecting hole and is arranged in the center of the sealing cover.

[0011] In the above scheme, preferably, a sulfuric acid cylinder for storing sulfuric acid is fixedly installed on one side of the upper end of the outer cylinder tank, and a cylinder cover for adding sulfuric acid is provided above the sulfuric acid cylinder, and a connecting pipe is connected to one side of the sulfuric acid cylinder, and the connecting pipe passes through the outer cylinder tank and the inner cylinder tank and is fitted with a sealing plate.

[0012] In the above scheme, preferably, a fixing plug is fixedly installed on the inner side of the mosaic plate for mosaicking it with the inner cylinder tank, limiting grooves are provided on both sides of one end of the mosaic plate, limiting spring rods are provided on both sides of one end of the sealing plate for mosaicking with the limiting grooves, and the other end of the sealing plate is fixedly connected to the counterweight plate.

[0013] In the above scheme, preferably, one side of the servo motor is fixedly connected to a delivery pipe for guiding the transmission of bromine-containing wastewater, the other end of the transmission shaft is fixedly connected to a fixing plate for preventing the separation basket from falling off, sliding blocks are provided at both ends of the separation basket, and a slide groove matching the same is provided in the inner cylinder tank.

[0014] A method for extracting hydrobromic acid from bromine-containing wastewater using a device, the specific method comprising the following steps: S1: The servo motor provides power to the transmission shaft, which in turn drives the centrifugal pump to introduce the bromine-containing wastewater from the delivery pipe into the inner cylinder tank; S2: When the bromine-containing wastewater is introduced into the inner cylinder tank, the transmission shaft drives the separation basket and the centrifugal box to rotate in the inner cylinder tank at the same time. When the centrifugal box rotates, the reactant inside falls into the bromine-containing wastewater, and the reactant and the bromine-containing wastewater are mixed by the rotation of the separation basket. The reactant uses a sufficient amount of calcium salt as the reactant, and the reactant can be adaptively selected according to the bromine concentration in the bromine-containing wastewater; S3: When the calcium salt reactant in the centrifugal box is mixed with the bromine-containing wastewater, static precipitation is performed to form a saturated calcium bromide precipitate in the separation basket; S4: When the bromine-containing wastewater is precipitated in the separation basket to form calcium bromide precipitate, the servo motor is driven to rotate in the reverse direction to drive the transmission shaft. At this time, the calcium bromide precipitate in the separation basket is centrifugally attached to the inner wall of the separation basket, and the separation basket is lifted up on the transmission shaft under the action of the inclined plate and the guide groove; S5: When the separation basket rises to the corresponding height on the transmission shaft, it pushes the counterweight plate on the sealing plate, thereby canceling the sealing plate from fitting with the inner cylinder tank. At this time, the sulfuric acid in the sulfuric acid cylinder flows to the outside of the separation basket through the connecting pipe and penetrates into the separation basket; S6: When sulfuric acid penetrates into the separation basket, it reacts with calcium bromide to produce hydrobromic acid solution and calcium sulfate precipitate. At this time, the hydrobromic acid solution flows into the inner cylinder tank through the separation basket, while the calcium sulfate precipitate is retained in the separation basket, so that the hydrobromic acid in the inner cylinder tank can be extracted.

[0015] The present invention provides a device and method for extracting hydrobromic acid from bromine-containing wastewater, which has the following technical points and beneficial effects: 1. The present invention uses devices such as a separation basket, an inclined plate and a centrifugal box. Since the transmission shaft penetrates the center of the separation basket and the centrifugal box, it drives them to rotate in the inner cylinder tank. When the centrifugal box rotates, the centrifugal force causes the opening and closing plate to overcome the elastic force of the elastic member and open, and the internal calcium salt reactant falls into the bromine-containing wastewater. The rotation of the separation basket causes the inclined plate to disturb the solution to fully mix the reactant and the bromine-containing wastewater. During the mixing process, the heating tube heats the bromine-containing wastewater, which helps to promote the reaction. The position control of the separation basket at different stages is achieved through the cooperation of structures such as the inclined plate, the guide thread and the guide groove, ensuring the smooth progress of the reaction and separation process. At the same time, by selecting a suitable reactant to produce a precipitate from the bromine-containing wastewater, the extraction cost is reduced.

[0016] 2. The present invention uses a separation basket, an inclined plate, a sealing plate and other devices, and a servo motor rotates in the opposite direction to drive the transmission shaft. At this time, the calcium bromide precipitate in the separation basket adheres to the inner wall of the separation basket under the action of centrifugal force, and the separation basket obtains a lifting force and performs an ascending operation on the transmission shaft. When the separation basket rises to a corresponding height on the transmission shaft, it pushes the counterweight plate on the sealing plate, thereby canceling the sealing plate from fitting with the inner cylinder tank. At this time, sulfuric acid in the sulfuric acid cylinder flows to the outside of the separation basket through the connecting pipe and penetrates into the separation basket. Sulfuric acid reacts with calcium bromide to generate a hydrobromic acid solution and a calcium sulfate precipitate. The hydrobromic acid solution flows into the inner cylinder tank through the separation basket, and the calcium sulfate precipitate is retained in the separation basket. Finally, the hydrobromic acid in the inner cylinder tank can be extracted.

[0017] 3. The present invention uses a bromine concentration detector, an elastic member, an opening and closing plate and other devices. When the calcium salt reactant in the centrifugal box is mixed with the bromine-containing wastewater to produce a precipitate, the bromine concentration detector detects that the bromine concentration in the solution is low. Since the resistance encountered by the separation basket during rotation increases with the increase of the precipitate seal, the elastic member pushes the push block to gradually close the opening and closing plate, and then the resistance of the separation basket and the inclined plate is increased to assist in judging the precipitate concentration in the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the partial structure of the support base in the present invention; Figure 3 It is a schematic diagram of the internal structure of the outer cylinder tank in the present invention; Figure 4 It is a schematic diagram of the internal structure of the inner cylinder tank in the present invention; Figure 5 It is a schematic diagram of the local structure of the transmission shaft in the present invention; Figure 6 It is a partial structural schematic diagram of the separation basket in the present invention; Figure 7 It is a partial structural schematic diagram of the sealing cover in the present invention; Figure 8 It is a schematic diagram of the local structure of the interlocking plate in the present invention; Fig. 9 It is a partial structural schematic diagram of the centrifugal box in the present invention; Fig.10 For the present invention Figure 2 A schematic diagram of the enlarged local structure at point A in the middle.

[0019] In the figure: 1, outer cylinder tank; 101, support base; 2, sulfuric acid cylinder; 201, cylinder cover; 202, connecting pipe; 3, bromine concentration detector; 4, heater; 5, heating tube; 6, supporting foot; 7, electric valve; 8, sealing cover; 801, connecting hole; 9, centrifugal pump; 10, servo motor; 11, delivery pipe; 12, handle; 13, clamping column; 14, inner cylinder tank; 1401, connecting shaft; 1402, separation basket; 1403, tilting plate; 15, transmission shaft; 1501, guide groove; 1502, fixing plate; 16, centrifugal box; 1601, elastic member; 1602, push block; 1603, opening and closing plate; 17, interlocking plate; 1701, fixing plug; 1702, sealing plate; 1703, limit spring rod; 1704, limit groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figures 1 to 10 The present invention provides a technical solution for extracting hydrobromic acid from bromine-containing wastewater using a device and method: A device for extracting hydrobromic acid from bromine-containing wastewater comprises an outer cylinder tank 1 and an inner cylinder tank 14, and a sealing cover 8 for sealing located above the inner cylinder tank 14, a heating pipe 5 is arranged between the outer cylinder tank 1 and the inner cylinder tank 14, and the heating pipe 5 is fixedly mounted around the outer surface of the inner cylinder tank 14, a centrifugal pump 9 is fixedly mounted above the sealing cover 8, and a servo motor 10 powered by an external power supply is fixedly mounted above the centrifugal pump 9, a transmission shaft 15 is installed through the middle of the sealing cover 8, and the transmission shaft 15 penetrates the center of the centrifugal pump 9 and is transmission-connected to the servo motor 10, a separation basket 1402 is movably mounted on the inner side of the inner cylinder tank 14, and the transmission shaft 15 penetrates the center of the separation basket 1402, an inclined plate 1403 is fixedly connected equidistantly below the separation basket 1402, a guide groove 1501 is arranged on the other end of the transmission shaft 15, and a guide thread matching the guide groove 1501 is arranged at the center of the separation basket 1402; A centrifugal box 16 is fixedly installed at one end of the transmission shaft 15, and the transmission shaft 15 runs through the center of the centrifugal box 16. A plurality of opening and closing plates 1603 are movably installed on the inner side of the centrifugal box 16 at the lower end of the centrifugal box 16, and one end of the opening and closing plates 1603 is fixedly connected to a push block 1602, one side of the push block 1602 is fixedly connected to an elastic member 1601, and the other side of the elastic member 1601 is fixedly connected to the centrifugal box 16, a mosaic plate 17 is provided on one side of the centrifugal box 16, and the mosaic plate 17 is mosaic-connected to the inner cylinder tank 14, a sealing plate 1702 is movably installed on the inner side of the mosaic plate 17, and the sealing plate 1702 is sealed in contact with the inner surface of the inner cylinder tank 14.

[0022] As an embodiment of the present invention, Figures 1 to 10 As shown, sliding blocks are provided at both ends of the separation basket 1402, and a slide groove matched therewith is provided in the inner cylinder tank 14, a delivery pipe 11 for guiding the transmission of bromine-containing wastewater is fixedly connected to one side of the servo motor 10, and a fixing plate 1502 for preventing the separation basket 1402 from falling off is fixedly connected to the other end of the transmission shaft 15; During operation, the fixing plate 1502 is used to prevent the separation basket 1402 from falling off the transmission shaft 15, and the servo motor 10 is started to provide power for the transmission shaft 15. The transmission shaft 15 passes through the center of the centrifugal pump 9, thereby driving the centrifugal pump 9 to operate and introduce the bromine-containing wastewater from the delivery pipe 11 into the inner cylinder tank 14. At the same time, the transmission shaft 15 passes through the center of the separation basket 1402 and the centrifugal box 16, driving them to rotate in the inner cylinder tank 14. When the centrifugal box 16 rotates, the centrifugal force causes the opening and closing plate 1603 to overcome the elastic force of the elastic member 1601 and open, and the calcium salt reactant inside falls into the bromine-containing wastewater. The rotation of the separation basket 1402 fully mixes the reactant and the bromine-containing wastewater. During the mixing process, the heating tube 5 heats the bromine-containing wastewater, which helps to promote the reaction. The bromine concentration detector 3 monitors the inner cylinder tank 14 in real time. The concentration of bromine in the solution (the bromine concentration detector 3 can be a device of model MP523-06, and its detection principle is mainly to rely on the bromide ion selective electrode inside the detector to establish the relationship between the potential difference and the bromide ion concentration, and by measuring the potential difference, the concentration of bromide ions in the solution to be tested is calculated) in order to grasp the reaction process. When the calcium salt reactant in the centrifugal box 16 is mixed with the bromine-containing wastewater to produce a precipitate, the resistance encountered by the separation basket 1402 during rotation increases with the increase of the precipitate sealing. At this time, the push block 1602 is pushed by the elastic member 1601 to close the opening and closing plate 1603. At this time, the bromine concentration detector 3 detects that the bromine concentration in the solution is lower than the threshold value, and then stops the servo motor 10 to allow the solution and the precipitate to settle statically. At this time, a saturated calcium bromide precipitate is formed in the separation basket 1402; Subsequently, the servo motor 10 rotates in the reverse direction to drive the transmission shaft 15. At this time, the calcium bromide precipitate in the separation basket 1402 adheres to the inner wall of the separation basket 1402 under the action of centrifugal force. The rotation of the separation basket 1402 causes the inclined plate 1403 and the solution to generate a reaction force, thereby causing the separation basket 1402 to rise on the transmission shaft 15. When the solution is discharged through the electric valve 7, the solution height will drop. At this time, the inclined plate 1403 is reduced by the solution resistance. When the separation basket 1402 rotates, the inclined plate 1403 generates a downward airflow and obtains an auxiliary lifting force. Since sliding blocks are provided at both ends of the separation basket 1402, and a sliding groove matched with it is provided in the inner cylinder tank 14, and an elastic friction member that fits and transmits with the separation basket 1402 is provided on the fixed plate 1502, when the separation basket 1402 is pressed on the elastic friction member, the separation basket 1402 is separated by the elastic friction member. The friction force of the separation basket 1402 causes it to rotate, and generates an upward thrust in the solution through the inclined plate 1403, thereby matching the sliding block with the slide groove, so that the separation basket 1402 rises under the rotation of the transmission shaft 15, so that the separation basket 1402 can rise to the corresponding height. When the separation basket 1402 rises to the corresponding height on the transmission shaft 15, it pushes the counterweight plate on the sealing plate 1702, thereby causing the sealing plate 1702 to cancel the fit with the inner cylinder tank 14. At this time, the sulfuric acid in the sulfuric acid cylinder 2 flows to the outside of the separation basket 1402 through the connecting pipe 202 and penetrates into the separation basket 1402. The sulfuric acid reacts with calcium bromide to generate a hydrobromic acid solution and a calcium sulfate precipitate. The hydrobromic acid solution flows into the inner cylinder tank 14 through the separation basket 1402, while the calcium sulfate precipitate is retained in the separation basket 1402. Finally, the hydrobromic acid in the inner cylinder tank 14 can be extracted.

[0023] As an embodiment of the present invention, Figures 1 to 6 As shown, a support base 101 is fixedly installed below the outer cylinder tank 1, a groove is provided on one side of the outer cylinder tank 1 and the support base 101, and a bromine concentration detector 3 and a heater 4 are provided in the groove, the bromine concentration detector 3 is set to detect the solution inside the inner cylinder tank 14 through the opening provided on the inner cylinder tank 14, the heater 4 is fixedly installed on the outer surface of the inner cylinder tank 14 and is electrically connected to the heating pipe 5, at least three support legs 6 are fixedly installed below the support base 101, and an electric valve 7 is provided in the middle of the support legs 6, the electric valve 7 is fixedly installed at the bottom of the support base 101 and is connected to the inner cylinder tank 14; During operation, the outer cylinder tank 1 and the inner cylinder tank 14 are installed and used through the support base 101, and then fixed and placed through the support feet 6. When the bromine-containing wastewater enters the inner cylinder tank 14, the bromine concentration in the inner cylinder tank 14 is monitored in real time through the bromine concentration detector 3, and the bromine-containing wastewater in the inner cylinder tank 14 is heated by the heater 4, so as to facilitate the mixing of the bromine-containing wastewater with the reactant released from the centrifugal box 16. When the bromine-containing wastewater and the reactant are mixed to produce calcium bromide precipitate, the bromine concentration detector 3 detects that the bromine content in the solution in the inner cylinder tank 14 is so low that it cannot be extracted anymore, so that the servo motor 10 is driven in reverse, and the electric valve 7 is operated to discharge the solution that cannot extract hydrobromic acid, and the electric valve 7 is closed after the solution is discharged.

[0024] As an embodiment of the present invention, Figures 1 to 3 As shown, a connecting shaft 1401 is fixedly installed equidistantly on the outer side of the inner cylinder tank 14, and a plurality of clamping columns 13 are movably installed in the middle of the connecting shaft 1401, and the clamping columns 13 are connected to the sealing cover 8 by snapping through the connecting shaft 1401. Handles 12 are fixedly installed symmetrically on both sides of the sealing cover 8, and the handles 12 are arranged between the clamping columns 13. A connecting hole 801 is penetrated in the middle of the sealing cover 8, and the transmission shaft 15 is arranged in the center of the sealing cover 8 through the connecting hole 801; During operation, the clamping column 13 is installed through the connecting shaft 1401, and the clamping column 13 moves on the connecting shaft 1401 to facilitate the opening and closing of the sealing cover 8. Secondly, the handle 12 is used to facilitate the removal or installation of the sealing cover 8 from the inner cylinder tank 14, and the bromine-containing wastewater is input into the inner cylinder tank 14 through the connecting hole 801, which facilitates the installation and use of the transmission shaft 15.

[0025] As an embodiment of the present invention, Figures 1 to 8 As shown, a sulfuric acid cylinder 2 for storing sulfuric acid is fixedly installed on one side of the upper end of the outer cylinder tank 1, and a cylinder cover 201 for adding sulfuric acid is provided above the sulfuric acid cylinder 2, a connecting pipe 202 is connected through one side of the sulfuric acid cylinder 2, and the connecting pipe 202 passes through the outer cylinder tank 1 and the inner cylinder tank 14 and is arranged in a close contact with the sealing plate 1702, a fixing plug 1701 for fitting it with the inner cylinder tank 14 is fixedly installed on the inner side of the interlocking plate 17, limiting grooves 1704 are provided on both sides of one end of the interlocking plate 17, limiting spring rods 1703 for fitting with the limiting grooves 1704 are provided on both sides of one end of the sealing plate 1702, and the other end of the sealing plate 1702 is fixedly connected to the counterweight plate; During operation, sulfuric acid is stored in the sulfuric acid cylinder 2 so that it can be used when extracting hydrobromic acid from calcium bromide. Sulfuric acid is added to the sulfuric acid cylinder 2 through the cylinder cover 201 for use. Then, the sulfuric acid is transported to the inner cylinder tank 14 through the connecting pipe 202. The fixing plug 1701 is inserted into the corresponding hole on the inner cylinder tank 14 to fix the interlocking plate 17. The limiting spring rod 1703 cooperates with the limiting groove 1704 to prevent the sealing plate from 1702 falls off from the interlocking plate 17, and then the counterweight plate on the sealing plate 1702 is used to drive the sealing plate 1702 to slide into the interlocking plate 17 when the separation basket 1402 rises to a certain position, so that the connecting pipe 202 can flow sulfuric acid into the separation basket 1402. At the same time, when the separation basket 1402 does not rise to the required height, the counterweight plate is used to make the sealing plate 1702 slide out of the interlocking plate 17 under the action of gravity to fit and seal the connecting pipe 202.

[0026] A method for extracting hydrobromic acid from bromine-containing wastewater using a device, the specific method comprising the following steps: S1: The servo motor 10 provides power to the transmission shaft 15, and the transmission shaft 15 drives the centrifugal pump 9 to operate to introduce the bromine-containing wastewater from the delivery pipe 11 into the inner cylinder tank 14; S2: When the bromine-containing wastewater is introduced into the inner cylinder tank 14, the transmission shaft 15 drives the separation basket 1402 and the centrifugal box 16 to rotate in the inner cylinder tank 14 at the same time. When the centrifugal box 16 rotates, the reactant inside falls into the bromine-containing wastewater, and the reactant and the bromine-containing wastewater are mixed by the rotation of the separation basket 1402. The reactant uses a sufficient amount of calcium salt as the reactant, and the reactant can be adaptively selected according to the bromine concentration in the bromine-containing wastewater; S3: When the calcium salt reactant in the centrifugal box 16 is mixed with the bromine-containing wastewater, static precipitation is performed to form a saturated calcium bromide precipitate in the separation basket 1402; S4: When the bromine-containing wastewater is precipitated in the separation basket 1402 to form calcium bromide precipitate, the servo motor 10 is rotated in the reverse direction to drive the transmission shaft 15. At this time, the calcium bromide precipitate in the separation basket 1402 is centrifugally attached to the inner wall of the separation basket 1402. At the same time, the separation basket 1402 is lifted up on the transmission shaft 15 under the action of the inclined plate 1403 and the guide groove 1501. S5: When the separation basket 1402 rises to a corresponding height on the transmission shaft 15, it pushes the counterweight plate on the sealing plate 1702, thereby canceling the sealing plate 1702 from fitting with the inner cylinder tank 14. At this time, the sulfuric acid in the sulfuric acid cylinder 2 flows to the outside of the separation basket 1402 through the connecting pipe 202 and penetrates into the separation basket 1402; S6: When sulfuric acid penetrates into the separation basket 1402, it reacts with calcium bromide to produce hydrobromic acid solution and calcium sulfate precipitate. At this time, the hydrobromic acid solution flows into the inner cylinder tank 14 through the separation basket 1402, while the calcium sulfate precipitate is retained in the separation basket 1402, and the hydrobromic acid in the inner cylinder tank 14 can be extracted.

[0027] Working principle: The servo motor 10 is started to provide power for the transmission shaft 15, and the transmission shaft 15 drives the centrifugal pump 9 to operate to realize the transportation of bromine-containing wastewater. At the same time, the transmission shaft 15 passes through the center of the separation basket 1402 and the centrifugal box 16, driving them to rotate in the inner cylinder tank 14. When the centrifugal box 16 rotates, the centrifugal force causes the opening and closing plate 1603 to overcome the elastic force of the elastic member 1601 and open, and the calcium salt reactant inside falls into the bromine-containing wastewater. The rotation of the separation basket 1402 fully mixes the reactant and the bromine-containing wastewater, and the heating tube 5 heats the bromine-containing wastewater. To help promote the reaction, the bromine concentration detector 3 monitors the bromine concentration in the inner cylinder tank 14 in real time to grasp the reaction process. When the calcium salt reactant in the centrifugal box 16 is mixed with the bromine-containing wastewater to produce a precipitate, the resistance encountered by the separation basket 1402 during rotation increases with the increase of the precipitate. At this time, the elastic member 1601 pushes the push block 1602 to close the opening and closing plate 1603. When the bromine concentration detector 3 detects that the bromine concentration in the solution is low, the servo motor 10 stops operating, allowing the solution and the precipitate to settle statically, and a saturated calcium bromide precipitate is formed in the separation basket 1402. Then, the servo motor 10 rotates in the reverse direction to drive the transmission shaft 15, and the calcium bromide precipitate in the separation basket 1402 adheres to the inner wall of the separation basket 1402 under the action of centrifugal force. When the separation basket 1402 rotates, the inclined plate 1403 and the solution generate a reaction force. At the same time, the height of the solution decreases when it is discharged through the electric valve 7. The inclined plate 1403 is reduced by the resistance of the solution, and a downward airflow is generated to obtain a lifting force, so that the separation basket 1402 rises to a corresponding height under the cooperation of the inclined plate 1403 below, the guide thread and the guide groove 1501 on the transmission shaft 15. When the separation basket 1402 rises to a corresponding height on the transmission shaft 15, the counterweight plate on the sealing plate 1702 is pushed, so that the sealing plate 1702 cancels the fit with the inner cylinder tank 14, and the sulfuric acid in the sulfuric acid cylinder 2 flows to the outside of the separation basket 1402 through the connecting pipe 202 and penetrates into the separation basket 1402, and the sulfuric acid reacts with the calcium bromide to generate a hydrobromic acid solution and a calcium sulfate precipitate, and the hydrobromic acid solution flows into the inner cylinder tank 14 through the separation basket 1402, while the calcium sulfate precipitate is retained in the separation basket 1402, and finally, the hydrobromic acid in the inner cylinder tank 14 can be extracted; During the whole process, the support base 101 is used to install and support the outer cylinder tank 1 and the inner cylinder tank 14, the support foot 6 is used for fixed placement, the bromine concentration detector 3 monitors the bromine concentration in the inner cylinder tank 14 in real time, and the heater 4 heats the bromine-containing wastewater in the inner cylinder tank 14 to promote the reaction. When the bromine-containing wastewater is mixed with the reactant to produce calcium bromide precipitate and the bromine concentration detector 3 detects that the bromine content is too low to be extracted, the servo motor 10 is driven in reverse, and the electric valve 7 is operated to discharge the solution that can no longer extract hydrobromic acid. After the solution is discharged, the electric valve 7 is closed, and the connecting shaft 1401 and the clamping column 13 on the outer side of the inner cylinder tank 14 are used for the opening and closing fixing operation of the sealing cover 8, and the handle 12 facilitates the removal of the sealing cover 8. The connecting hole 801 is used for inputting bromine-containing wastewater and installing the transmission shaft 15. The sulfuric acid cylinder 2 is used for storing sulfuric acid. The cylinder cover 201 is used for adding sulfuric acid. The connecting pipe 202 transports sulfuric acid to the inner cylinder tank 14. The interlocking plate 17 is interlocked and installed with the inner cylinder tank 14 through the fixed plug 1701. The limiting elastic rod 1703 cooperates with the limiting groove 1704 to prevent the sealing plate 1702 from falling off. When the separation basket 1402 rises to a certain position, the counterweight plate on the sealing plate 1702 drives the sealing plate 1702 to slide into the interlocking plate 17, so that sulfuric acid flows into the separation basket 1402. When the separation basket 1402 does not rise to the required height, the counterweight plate causes the sealing plate 1702 to slide out of the interlocking plate 17, and the connecting pipe 202 is fitted and sealed.

[0028] It should be noted that when the servo motor 10 drives the bromine-containing wastewater to mix with the reactant to rotate the separation basket 1402, the inclined plate 1403 will not obtain an upward force during this process because the inclined plate 1403 is affected by the force. At the same time, with the cooperation of the guide thread and the guide groove 1501, the separation basket 1402 is maintained at the lower end position in the inner cylinder tank 14. When the servo motor 10 is driven in reverse, the inclined plate 1403 obtains an upward force through the structural design during this process. At the same time, with the cooperation of the guide thread and the guide groove 1501, the separation basket 1402 rises to the corresponding height of the inner cylinder tank 14.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for extracting hydrobromic acid from bromine-containing wastewater, comprising an outer cylinder tank (1) and an inner cylinder tank (14), and a sealing cover (8) located above the inner cylinder tank (14) for sealing, wherein a heating pipe (5) is provided between the outer cylinder tank (1) and the inner cylinder tank (14), and the heating pipe (5) is fixedly mounted around the outer surface of the inner cylinder tank (14), characterized in that: A centrifugal pump (9) is fixedly mounted above the sealing cover (8), and a servo motor (10) powered by an external power supply is fixedly mounted above the centrifugal pump (9); a transmission shaft (15) is installed through the middle of the sealing cover (8), and the transmission shaft (15) passes through the center of the centrifugal pump (9) and is transmission-connected to the servo motor (10); a separation basket (1402) is movably mounted on the inner side of the inner cylinder tank (14), and the transmission shaft (15) passes through the center of the separation basket (1402); an inclined plate (1403) is fixedly connected to the bottom of the separation basket (1402) at an equidistant distance; a guide groove (1501) is provided on the other end of the transmission shaft (15), and a guide thread matching the guide groove (1501) is provided at the center of the separation basket (1402); A centrifugal box (16) is fixedly mounted on one end of the transmission shaft (15), and the transmission shaft (15) is arranged to penetrate the center of the centrifugal box (16); a plurality of opening and closing plates (1603) are movably mounted on the inner side of the centrifugal box (16) at the lower end of the centrifugal box (16); one end of each opening and closing plate (1603) is fixedly connected to a push block (1602); one side of each push block (1602) is fixedly connected to an elastic member (1601), and the other side of the elastic member (1601) is fixedly connected to the centrifugal box (16); a fitting plate (17) is provided on one side of the centrifugal box (16), and the fitting plate (17) is fitted and connected to the inner barrel tank (14); a sealing plate (1702) is movably mounted on the inner side of the fitting plate (17), and the sealing plate (1702) is fitted and sealed to the inner surface of the inner barrel tank (14).

2. The device for extracting hydrobromic acid from bromine-containing wastewater according to claim 1, characterized in that: A support base (101) is fixedly installed below the outer cylinder tank (1), and a groove is provided on one side of the outer cylinder tank (1) and the support base (101), and a bromine concentration detector (3) and a heater (4) are provided in the groove, and the bromine concentration detector (3) is arranged to detect the solution inside the inner cylinder tank (14) through an opening provided on the inner cylinder tank (14), and the heater (4) is fixedly installed on the outer surface of the inner cylinder tank (14) and is electrically connected to the heating pipe (5).

3. The device for extracting hydrobromic acid from bromine-containing wastewater according to claim 2, characterized in that: At least three supporting legs (6) are fixedly mounted below the supporting base (101), and an electric valve (7) is provided in the middle of the supporting legs (6). The electric valve (7) is fixedly mounted on the bottom of the supporting base (101) and is connected to the inner cylinder tank (14).

4. The device for extracting hydrobromic acid from bromine-containing wastewater according to claim 1, characterized in that: Connecting shafts (1401) are fixedly installed at equal intervals on the outer side of the inner cylinder tank (14), and a plurality of clamping columns (13) are movably mounted in the middle of the connecting shaft (1401), and the clamping columns (13) are all connected to the sealing cover (8) by snap-fitting through the connecting shaft (1401).

5. The device for extracting hydrobromic acid from bromine-containing wastewater according to claim 2, characterized in that: Handles (12) are symmetrically fixedly mounted on both sides of the sealing cover (8), and the handles (12) are arranged between the clamping columns (13). A connecting hole (801) is provided through the middle of the sealing cover (8), and the transmission shaft (15) passes through the connecting hole (801) and is arranged in the center of the sealing cover (8).

6. The device for extracting hydrobromic acid from bromine-containing wastewater according to claim 1, characterized in that: A sulfuric acid cylinder (2) for storing sulfuric acid is fixedly mounted on one side of the upper end of the outer cylinder tank (1), and a cylinder cover (201) for adding sulfuric acid is provided above the sulfuric acid cylinder (2). A connecting pipe (202) is connected through one side of the sulfuric acid cylinder (2), and the connecting pipe (202) passes through the outer cylinder tank (1) and the inner cylinder tank (14) and is arranged in close contact with the sealing plate (1702).

7. The device for extracting hydrobromic acid from bromine-containing wastewater according to claim 1, characterized in that: A fixing plug (1701) is fixedly installed on the inner side of the engaging plate (17) for engaging the engaging plate with the inner cylinder tank (14), and limiting grooves (1704) are provided on both sides of one end of the engaging plate (17), and limiting spring rods (1703) are provided on both sides of one end of the sealing plate (1702) for engaging with the limiting grooves (1704) for limiting the position, and the other end of the sealing plate (1702) is fixedly connected to the counterweight plate.

8. The device for extracting hydrobromic acid from bromine-containing wastewater according to claim 1, characterized in that: A delivery pipe (11) for guiding the transmission of bromine-containing wastewater is fixedly connected to one side of the servo motor (10), and a fixing plate (1502) for preventing the separation basket (1402) from falling off is fixedly connected to the other end of the transmission shaft (15), and sliding blocks are provided at both ends of the separation basket (1402), and a sliding groove matching the sliding blocks is provided in the inner cylinder tank (14).

9. A method for extracting hydrobromic acid from bromine-containing wastewater according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: The servo motor (10) provides power to the transmission shaft (15), and the transmission shaft (15) drives the centrifugal pump (9) to operate and introduce the bromine-containing wastewater from the delivery pipe (11) into the inner cylinder tank (14); S2: When the bromine-containing wastewater is introduced into the inner cylinder tank (14), the transmission shaft (15) drives the separation basket (1402) and the centrifugal box (16) to rotate in the inner cylinder tank (14). When the centrifugal box (16) rotates, the reactant inside falls into the bromine-containing wastewater, and the reactant and the bromine-containing wastewater are mixed by the rotation of the separation basket (1402). The reactant uses a sufficient amount of calcium salt as the reactant, and the reactant can be adaptively selected according to the bromine concentration in the bromine-containing wastewater; S3: When the calcium salt reactant in the centrifugal box (16) is mixed with the bromine-containing wastewater, static precipitation is performed to form a saturated calcium bromide precipitate in the separation basket (1402); S4: When the bromine-containing wastewater is precipitated in the separation basket (1402) to form calcium bromide precipitate, the servo motor (10) is driven to rotate in the reverse direction to drive the transmission shaft (15), and the calcium bromide precipitate in the separation basket (1402) is centrifugally attached to the inner wall of the separation basket (1402), and the separation basket (1402) is lifted up on the transmission shaft (15) under the action of the inclined plate (1403) and the guide groove (1501); S5: When the separation basket (1402) rises to a corresponding height on the transmission shaft (15), it pushes the counterweight plate on the sealing plate (1702), thereby causing the sealing plate (1702) to cancel the fit with the inner cylinder tank (14). At this time, the sulfuric acid in the sulfuric acid cylinder (2) flows to the outside of the separation basket (1402) through the connecting pipe (202) and penetrates into the separation basket (1402); S6: When sulfuric acid penetrates into the separation basket (1402), it reacts with calcium bromide to produce hydrobromic acid solution and calcium sulfate precipitate. At this time, the hydrobromic acid solution flows into the inner cylinder tank (14) through the separation basket (1402), while the calcium sulfate precipitate is retained in the separation basket (1402), and the hydrobromic acid in the inner cylinder tank (14) can be extracted.

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