A distillation column and a process for recovering bromine using the same
By designing a distillation tower system including a flow blocking plate, exhaust mechanism and intermittent liquid discharge components, the problem of waste of steam and chlorine and inability to automatically detach impurities in the existing bromine production process is solved, and efficient steam purification and improvement of bromine yield is achieved.
Patent Information
- Application Number
- CN202310353938.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-04-06
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2043-04-06
AI Technical Summary
In the existing bromine production process, steam and chlorine are wasteful, and multiple mixing pressure and pressure storage operations cannot be achieved, resulting in the inability to automatically detach the impurities in the steam, affecting the purity of chlorine and reducing production performance.
A distillation tower system including a base, a distillation tower, a heater, a pumper, a liquid injection tube, a recovery tube, an electric heating wire, a flow blocking plate, a flow guide plate, an overflow plate, a gas pipe, a docking plate, a gas top tube and a batch discharge assembly are designed. Through the cooperation of the flow blocking plate, the exhaust mechanism and the intermittent discharge assembly, multiple purification and washing of steam, as well as multiple mixing and pressure storage operations.
The cleanliness of chlorine in steam is improved, the continuous operation of the bromine distillation process is realized, the amount of steam and chlorine is reduced, the production cost is reduced, and the bromine yield is increased, and gas emissions are reduced.
Smart Images
Figure CN116116027B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of bromine distillation, and in particular to a distillation column and a process for recovering bromine by using the same. Background Art
[0002] Bromine is one of the important chemical raw materials and is a major branch of the marine chemical industry. A wide variety of inorganic bromides, bromates, and bromine-containing organic compounds derived from it have special values in the national economy and the development of science and technology. In recent years, with the application of advanced domestic and foreign technologies, the extraction of bromine from underground brine and concentrated seawater has developed rapidly.
[0003] However, at present, most domestic bromine manufacturers use chlorine to oxidize brine in a distillation kettle or distillation cylinder to prepare bromine. However, in actual production, since the reaction kettle is mostly an enamel reaction kettle, sudden temperature changes cannot be achieved, the heating process is slow, steam and chlorine are wasted seriously, it is not convenient to perform multiple mixing and pressing operations on the rising steam, and multiple pressure accumulation operations cannot be performed on the rising steam, resulting in the inability of impurities in the steam to automatically separate during the pressure accumulation process, affecting the purity of the subsequent steam to form distilled water and the reuse of chlorine in the steam, resulting in low continuous production performance and high bromine content in the distillation waste liquid during continuous operation; therefore, the above problems need to be improved. Summary of the Invention
[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art and to propose a distillation column.
[0005] To achieve the above purpose, the present invention adopts the following technical scheme: A distillation column includes a base, a distillation column provided in the middle of the top surface of the base, and heaters provided on both sides of the bottom surface of the base. One side of the lower part of the distillation column is provided with a pump, a liquid injection pipe is horizontally connected in the middle of one side of the distillation column, the bottom end of the liquid injection pipe is fixedly connected to the liquid outlet end of the pump, a recovery pipe for chlorine recovery is horizontally connected to one side of the top of the distillation column, a pair of electric heating wires are horizontally arranged inside the bottom of the distillation column, and the ends of the electric heating wires are electrically connected to the heaters; the liquid inlet pipe at the bottom end of the pump is fixedly connected to the inside of the bottom of the distillation column;
[0006] A plurality of L-shaped baffles are evenly and horizontally arranged on the inner walls on both sides of the distillation tower. The baffles on the inner walls on both sides of the distillation tower are staggered up and down, and a guide plate is vertically fixedly connected to the bottom of the suspended end of the baffle, and a five-centimeter drainage space is reserved between the bottom end surface of the guide plate and the top surface of the baffle below; an overflow plate is vertically arranged on the top of the suspended end of the baffle, and a ten-centimeter air guide space is reserved between the top surface of the overflow plate and the bottom surface of the upper baffle; a plurality of air guide ports are evenly arranged on the top surface of the baffle, and air guide pipes are vertically fixedly connected inside the air guide ports, and an exhaust mechanism for steam rising is arranged inside the air guide pipes; a docking plate is horizontally fixedly connected to the middle part and the upper and lower parts of the distillation tower; a plurality of through holes are evenly arranged on one side of the top surface of the docking plate; a plurality of gas top pipes are arranged at intervals inside the through holes; and intermittent liquid drainage components are arranged inside the through holes between the gas top pipes.
[0007] Preferably, the top of the distillation tower is a closed hemispherical shape, and a collector plate is horizontally arranged inside the top of the distillation tower, and the collector plate is composed of three U-shaped liquid collecting trough plates, and the three liquid collecting trough plates are arranged at equal intervals. The upper parts of the outer walls of the liquid collecting trough plates on both sides are fixedly connected to the inner wall of the distillation tower, and the upper parts of the outer walls of both sides of the middle liquid collecting trough plate are fixedly connected to connecting rods fixed to the liquid collecting trough plates on both sides.
[0008] Preferably, the exhaust mechanism includes a hemispherical buoyancy block horizontally arranged on the top of the air duct, a connecting tube vertically fixed to the middle of the bottom surface of the buoyancy block, a shroud horizontally movably inverted inside the air duct, and a stabilizing tube vertically penetrating both sides of the top of the shroud, the two ends of the air duct are closed, and a plurality of air inlets are equidistantly provided on the outer wall of the tube body located at the lower part of the spoiler; fixed grooves are vertically provided on both sides of the inner top surface of the air duct, stabilizing rods are vertically fixed inside the fixed grooves, and the bottom end of the stabilizing rod is movably inserted into the inside of the stabilizing tube; a thrust spring is movably sleeved on the rod body of the stabilizing rod located inside the fixed groove; the top opening of the shroud is fixedly connected to the bottom end of the connecting tube, and the top outer wall of the connecting tube is horizontally connected around a one-way air outlet valve tube.
[0009] Preferably, the top horizontal cover of the gas top pipe is provided with a blocking cap, a floating rod is vertically fixed to the middle of the bottom surface of the blocking cap, and the rod body of the floating rod is movably inserted into the gas top pipe and extends from the bottom of the gas top pipe.
[0010] Preferably, the intermittent liquid discharge assembly includes a horizontal strip fixedly connected to the middle part of the through hole between the gas top pipes, a fixing column vertically arranged in the middle of the top surface of the strip, a sealing plate horizontally and movably sealed in the bottom of the through hole, and a storage cavity opened inside the fixing column. An activity plate is horizontally movably arranged in the storage cavity. A hanging rod is vertically fixedly connected to the middle part of the bottom surface of the activity plate. The bottom end of the hanging rod movably penetrates below the bottom surface of the strip and is fixedly connected to the top surface of the sealing plate. A return spring is movably sleeved on the rod body of the hanging rod located inside the storage cavity.
[0011] Preferably, there is a flow port for liquid and gas to pass through between the flow guiding plate and the lower flow blocking plate below. One side above the flow port at the top of the distillation column is fixedly connected with an inclined flow collecting plate, and the suspended end of the flow collecting plate is in an arc shape bent downward. The flow collecting plate is located below the recovery pipe.
[0012] The present invention also proposes a process for recovering bromine using a distillation column, including the following steps:
[0013] S1. First, the heater and the pump are electrically connected to an external control device through wires respectively. Then, raw material brine is injected into the bottom of the distillation column, and the raw material brine submerges the electric heating wire. Then, the pump is started to transport a part of the raw material brine inside the distillation column to the flow blocking plate in the middle of the distillation column. The raw material brine on the flow blocking plate is intercepted conveniently under the action of the overflow plate. When the liquid level of the raw material brine on this flow blocking plate exceeds the height of the overflow plate, the raw material brine on this flow blocking plate will fall through the flow port onto the next flow blocking plate and fill the liquid storage space on the next flow blocking plate. After the liquid storage spaces on the lower two flow blocking plates are filled, the liquid injection operation of the pump can be stopped.
[0014] S2. Then, the electric heating wire is started to heat and evaporate the raw material brine. Then, when the rising steam passes through the flow blocking plate without raw material brine injected, the steam will rise through the flow port. When the steam continues to rise and passes through the lower docking plate, when the air pressure is low, the steam at this time will not lift the plugging cap inside the gas top pipe, so that after the steam accumulates pressure, more impurities in the rising steam can be reduced. When the air pressure of the steam reaches a certain value, the steam will lift the plugging cap and drive the floating rod to rise. Then, the steam is discharged into the middle of the distillation column through the gas top pipe.
[0015] S3. After the steam rises to the middle of the distillation column and encounters the baffle plate with raw brine injected, raw brine is injected onto this baffle plate, and the steam cannot easily rise through the flow-through opening between this baffle plate and the overflow plate; at this time, the steam will enter the inside of the air guide pipe and enter the inside of the connecting pipe through the diversion cover. Since the buoyancy block sinks in the raw brine on the baffle plate at this time, only after the air pressure of the steam increases again, the buoyancy block is pushed to rise by the air pressure of the steam, and the connecting pipe is driven to rise by the rising of the buoyancy block. The rising connecting pipe enables the one-way air outlet valve pipe to rise out of the air guide pipe. Then, the steam inside the connecting pipe is discharged into the raw brine on this baffle plate through the one-way air outlet valve pipe. By allowing the steam to enter the raw brine, it is convenient to wash the impurities inside the steam; further improving the purification effect of the steam.
[0016] S4. After the steam rises through the baffle plate with raw brine, when the steam continues to rise and passes through the baffle plate without raw brine injected again, the steam will rise to the top of the distillation column through the gap between the confluence plates. And at this time, the steam will form distilled water on the inner wall of the top of the distillation column. Then, part of the distilled water will fall into the liquid collection trough plate on the confluence plate. When the liquid in the liquid collection trough plate is full, the distilled water in the liquid collection trough plate will be on the lower baffle plate. Then, as the distilled water continues to increase, the storage spaces on each baffle plate will be filled in turn, so as to play a role in multiple purification, filtration, and washing of the impurities in the steam.
[0017] S5. The chlorine gas in the steam after multiple purification, filtration, and washing is recovered through the recovery pipe.
[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation of the baffle plate, the exhaust mechanism, and the intermittent liquid discharge component, the present invention facilitates multiple purification and washing operations on the steam inside the distillation column. At the same time, it can make the rising steam mix with the raw brine and distilled water multiple times, and can perform a pressure accumulation operation on the steam during the rising process, so that the impurities can be automatically separated during the pressure accumulation process of the steam, thereby improving the cleanliness of the chlorine gas mixed in the steam; realizing the continuous operation of the bromine distillation process. At the same time, since the raw brine is used to recover and recycle the discharged distillation heat and distilled water, the consumption of steam and chlorine gas is greatly reduced, the production cost is reduced, the bromine yield is increased, and the gas emission is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:
[0020] Figure 1Schematic front view structure diagram of the present invention;
[0021] Figure 2 Schematic cross-sectional view of the front view structure of the present invention;
[0022] Figure 3 Schematic top view structure diagram of the bus bar of the present invention;
[0023] Figure 4 Schematic top view structure diagram of the two baffle plates of the present invention with dislocation;
[0024] Figure 5 Schematic cross-sectional view of the closed state structure of the air duct of the present invention;
[0025] Figure 6 Schematic cross-sectional view of the open state structure of the air duct of the present invention;
[0026] Figure 7 Schematic cross-sectional view of the docking plate and the air jacking pipe of the present invention.
[0027] Reference numerals in the figure: 1, base; 2, distillation column; 3, heater; 4, pump; 5, liquid injection pipe; 6, recovery pipe; 7, electric heating wire; 8, baffle plate; 9, flow guide plate; 10, overflow plate; 11, air duct; 12, docking plate; 13, air jacking pipe; 14, bus bar; 15, buoyancy block; 16, connecting pipe; 17, flow guide cover; 18, stabilizing rod; 19, stabilizing pipe; 20, thrust spring; 21, plugging cap; 22, floating rod; 23, sealing plate; 24, cross bar; 25, fixed column; 26, suspension rod; 27, return spring; 28, current collecting plate. Detailed implementation manners
[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0029] Embodiment: Refer to Figures 1-7, a distillation column, comprising a base 1, a distillation column 2 provided in the middle of the top surface of the base 1, and heaters 3 provided on both sides of the bottom surface of the base 1. A pump 4 is provided on one side of the lower part of the distillation column 2. A liquid injection pipe 5 is horizontally connected in the middle of one side of the distillation column 2. The bottom end of the liquid injection pipe 5 is fixedly connected to the liquid outlet end of the pump 4. A recovery pipe 6 for chlorine recovery is horizontally connected to one side of the top of the distillation column 2. A pair of electric heating wires 7 are horizontally arranged inside the bottom of the distillation column 2. The ends of the electric heating wires 7 are electrically connected to the heaters 3; the liquid inlet pipe at the bottom end of the pump 4 is fixedly connected to the inside of the bottom of the distillation column 2; a plurality of L-shaped baffle plates 8 are horizontally arranged at equal intervals on the inner walls on both sides of the distillation column 2. The baffle plates 8 on the inner walls on both sides of the distillation column 2 are arranged in a vertical offset manner, and a flow guide plate 9 is vertically fixed to the bottom of the suspended end of the baffle plate 8. A drainage space of five centimeters is reserved between the bottom end surface of the flow guide plate 9 and the top surface of the lower baffle plate 8; an overflow plate 10 is vertically arranged at the top of the suspended end of the baffle plate 8. A gas guiding space of ten centimeters is reserved between the top end surface of the overflow plate 10 and the bottom surface of the upper baffle plate 8; a plurality of gas guiding ports are arranged at equal intervals on the top surface of the baffle plate 8. A gas guiding pipe 11 is vertically fixed inside each gas guiding port. An exhaust mechanism for steam to rise is arranged inside the gas guiding pipe 11; docking plates 12 are horizontally fixed in the middle, upper and lower parts of the distillation column 2; a plurality of through holes are arranged at equal intervals on one side of the top surface of the docking plate 12; a plurality of gas jacking pipes 13 are arranged at intervals inside the through holes; intermittent drainage components are arranged inside the through holes between the gas jacking pipes 13; through the cooperation of the baffle plates 8, the exhaust mechanism and the intermittent drainage components, it is convenient to perform multiple purification and washing operations on the steam inside the distillation column 2, and at the same time, the rising steam can be mixed with the raw material brine and distilled water multiple times, and the steam can be pressurized during the rising process, so that the impurities can be automatically separated during the pressurization process of the steam, thereby improving the cleanliness of the chlorine mixed in the steam; realizing the continuous operation of the bromine distillation process. At the same time, since the raw material brine is used to recover and recycle the discharged distillation heat and distilled water, the consumption of steam and chlorine is greatly reduced, the production cost is reduced, the bromine yield is increased, and the gas emission is reduced.
[0030] In the present invention, the exhaust mechanism includes a hemispherical buoyancy block 15 horizontally disposed on the top of the air guide pipe 11, a communication pipe 16 vertically fixed to the middle of the bottom surface of the buoyancy block 15, a diversion cover 17 horizontally and movably inverted inside the air guide pipe 11, and stabilizing pipes 19 vertically penetrating and disposed on both sides of the top of the diversion cover 17. Both ends of the air guide pipe 11 are closed, and a plurality of air inlets are equidistantly formed on the circumferential side of the outer wall of the pipe body of the air guide pipe 11 below the baffle plate 8. Fixed grooves are vertically formed on both sides of the inner top surface of the air guide pipe 11, and stabilizing rods 18 are vertically fixed inside the fixed grooves. The bottom ends of the stabilizing rods 18 are movably inserted into the inside of the stabilizing pipes 19. A thrust spring 20 is movably sleeved on the rod body of the stabilizing rod 18 located inside the fixed groove. The top opening of the diversion cover 17 is fixedly communicated with the bottom end of the communication pipe 16, and one-way air outlet valve pipes are horizontally communicated and provided around the outer wall of the top of the communication pipe 16.
[0031] In the present invention, a plugging cap 21 is horizontally covered on the top of the air jacking pipe 13. A floating rod 22 is vertically fixed to the middle of the bottom surface of the plugging cap 21. The rod body of the floating rod 22 is movably inserted into the air jacking pipe 13 and extends out from the bottom of the air jacking pipe 13. The intermittent liquid discharging assembly includes a cross bar 24 horizontally fixed in the middle of the through hole between the air jacking pipes 13, a fixed column 25 vertically disposed in the middle of the top surface of the cross bar 24, a sealing plate 23 horizontally and movably sealed inside the bottom of the through hole, and a storage cavity opened inside the fixed column 25. A movable plate is horizontally movably disposed inside the storage cavity. A hanging rod 26 is vertically fixed to the middle of the bottom surface of the movable plate. The bottom end of the hanging rod 26 movably penetrates below the bottom surface of the cross bar 24 and is fixed to the top surface of the sealing plate 23. A return spring 27 is movably sleeved on the rod body of the hanging rod 26 located inside the storage cavity.
[0032] In the present invention, the top of the distillation column 2 is a closed hemispherical shape, and a converging plate 14 is horizontally disposed inside the top of the distillation column 2. The converging plate 14 is composed of three U-shaped liquid collecting trough plates. The three liquid collecting trough plates are equidistantly arranged. The upper parts of the outer walls of the two side liquid collecting trough plates are fixed to the inner wall of the distillation column 2. Connecting rods fixed to the two side liquid collecting trough plates are fixed to the upper parts of the outer walls on both sides of the middle liquid collecting trough plate. There is a flow port for the passage of liquid and gas between the diversion plate 9 and the lower baffle plate 8. A collecting plate 28 is fixedly connected to one side above the flow port at the top of the distillation column 2 and is inclined. The suspended end of the collecting plate 28 is an arc-shaped surface bent downward. The collecting plate 28 is located below the recovery pipe 6.
[0033] Working principle: In this embodiment, the present invention also proposes a process for recovering bromine using the distillation column, including the following steps:
[0034] Step 1: First, electrically connect the heater 3 and the pump 4 to an external control device through wires respectively. Then, inject raw brine into the bottom of the distillation tower 2 and submerge the electric heating wire 7 with the raw brine. Then, start the pump 4 to transport a part of the raw brine inside the distillation tower 2 to the baffle 8 in the middle of the distillation tower 2. Under the action of the overflow plate 10, it is convenient to intercept the raw brine on the baffle 8. When the liquid level of the raw brine on this baffle 8 exceeds the height of the overflow plate 10, the raw brine on this baffle 8 will fall through the flow port onto the next baffle 8 and fill the liquid storage space on the next baffle 8; after filling the liquid storage spaces on the two lower baffles 8, the liquid injection operation of the pump 4 can be stopped;
[0035] Step 2: Then, start the electric heating wire 7 to heat and evaporate the raw brine. When the rising steam passes through the baffle 8 without raw brine injection, the steam will rise through the flow port. When the steam continues to rise and passes through the lower docking plate 12, when the air pressure is low, the steam at this time will not lift the plugging cap 21 inside the air top pipe 13, so that after the steam accumulates pressure, it is convenient to reduce the impurities doped in the steam during the rising process; when the air pressure of the steam reaches, the steam will lift the plugging cap 21 and drive the floating rod 22 to rise, and then the steam is discharged into the middle of the distillation tower 2 through the air top pipe 13;
[0036] Step 3: After the steam rises to the middle of the distillation tower 2, when it encounters the baffle 8 with raw brine injection, there is raw brine on this baffle 8, and the steam cannot easily rise through the flow port between this baffle 8 and the overflow plate 10; at this time, the steam will enter the inside of the air guide pipe 11 and enter the inside of the connecting pipe 16 through the guide cover 17. Since the buoyancy block 15 sinks in the raw brine on the baffle 8 at this time, only after the air pressure of the steam increases again, the buoyancy block 15 is pushed to rise by the air pressure of the steam. The rising of the buoyancy block 15 drives the connecting pipe 16 to rise. The rising connecting pipe 16 enables the one-way air outlet valve pipe to rise out of the air guide pipe 11. Then, the steam inside the connecting pipe 16 is discharged into the raw brine on this baffle 8 through the one-way air outlet valve pipe. By the steam entering the raw brine, it is convenient to wash the impurities inside the steam; further improve the purification effect of the steam;
[0037] Step 4: After the steam rises through the baffle plate 8 with raw material brine, when the steam continues to rise and passes through the baffle plate 8 without raw material brine again, the steam will rise through the gap between the confluence plates 14 to the top of the distillation tower 2. At this time, distilled water will be formed on the inner wall of the top of the distillation tower 2. Then, part of the distilled water will fall into the liquid collection trough plate on the confluence plate 14. When the liquid in the liquid collection trough plate is full, the distilled water in the liquid collection trough plate will be on the lower baffle plate 8. Then, as the distilled water continues to increase, the storage spaces on each baffle plate 8 will be filled in turn, so as to play a role in purifying, filtering and washing the impurities in the steam for multiple times;
[0038] Step 5: The chlorine gas in the steam after multiple purifications, filtrations and washings is recovered through the recovery pipe 6, realizing the continuous operation of the bromine distillation process. At the same time, since the raw material brine is used to recover and recycle the discharged distillation heat and distilled water, the consumption of steam and chlorine gas is greatly reduced, the production cost is reduced, the bromine yield is increased, and the gas emission is reduced.
[0039] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.
Claims
1. A distillation column, comprising a base (1), a distillation column (2) provided in the middle of the top surface of the base (1), and heaters (3) provided on both sides of the bottom surface of the base (1). It is characterized in that: On one side of the lower part of the distillation column (2), a pump (4) is provided. In the middle of one side of the distillation column (2), a liquid injection pipe (5) is horizontally communicated. The bottom end of the liquid injection pipe (5) is fixedly communicated with the liquid outlet end of the pump (4). On one side of the top of the distillation column (2), a recovery pipe (6) for chlorine recovery is horizontally communicated. Inside the bottom of the distillation column (2), a pair of electric heating wires (7) are horizontally provided. The ends of the electric heating wires (7) are electrically connected to the heaters (3). The inlet pipe at the bottom end of the pump (4) is fixedly communicated with the inside of the bottom of the distillation column (2). On the inner walls on both sides of the distillation column (2), a plurality of L-shaped baffle plates (8) are horizontally provided at equal intervals. The baffle plates (8) on the inner walls on both sides of the distillation column (2) are arranged in a vertically staggered manner. And at the bottom of the suspended end of the baffle plate (8), a flow guide plate (9) is vertically fixed. A drainage space of five centimeters is reserved between the bottom end surface of the flow guide plate (9) and the top surface of the lower baffle plate (8). At the top of the suspended end of the baffle plate (8), an overflow plate (10) is vertically provided. A gas guiding space of ten centimeters is reserved between the top end surface of the overflow plate (10) and the bottom surface of the upper baffle plate (8). On the top surface of the baffle plate (8), a plurality of gas guiding ports are opened at equal intervals. Inside the gas guiding ports, gas guiding pipes (11) are vertically fixed. Inside the gas guiding pipes (11), an exhaust mechanism for steam to rise is provided. In the middle, upper and lower parts of the distillation column (2), docking plates (12) are horizontally fixed. On one side of the top surface of the docking plate (12), a plurality of through holes are opened at equal intervals. Inside the through holes, a plurality of gas jacking pipes (13) are arranged at intervals. Inside the through holes between the gas jacking pipes (13), an intermittent liquid drainage assembly is provided. The exhaust mechanism includes a hemispherical buoyancy block (15) horizontally provided at the top of the gas guiding pipe (11), a communicating pipe (16) vertically fixed in the middle of the bottom surface of the buoyancy block (15), a flow guide cover (17) horizontally and movably inverted inside the gas guiding pipe (11), and stabilizing pipes (19) vertically penetrating through both sides of the top of the flow guide cover (17). The two ends of the gas guiding pipe (11) are closed. And on the circumferential side of the pipe body of the gas guiding pipe (11) located below the baffle plate (8), a plurality of air inlet ports are opened at equal intervals. On both sides of the inner top surface of the gas guiding pipe (11), fixing grooves are vertically opened. Inside the fixing grooves, stabilizing rods (18) are vertically fixed. The bottom ends of the stabilizing rods (18) are movably inserted into the inside of the stabilizing pipes (19). On the rod bodies of the stabilizing rods (18) located inside the fixing grooves, thrust springs (20) are movably sleeved. The top opening of the flow guide cover (17) is fixedly communicated with the bottom end of the communicating pipe (16). Horizontally communicated with the outer wall around the top of the communicating pipe (16) are one-way air outlet valve pipes. The intermittent liquid drainage assembly includes a cross bar (24), a fixing column (25), a sealing plate (23) and a receiving cavity.
2. A distillation column according to claim 1, It is characterized in that: The top of the distillation column (2) is a closed hemispherical shape, and a confluence plate (14) is horizontally arranged inside the top of the distillation column (2). The confluence plate (14) is composed of three U-shaped plate-like liquid collecting trough plates. The three liquid collecting trough plates are arranged at equal intervals. The upper parts of the outer walls of the two side liquid collecting trough plates are fixedly connected to the inner wall of the distillation column (2). Connecting rods fixedly connected to the two side liquid collecting trough plates are fixedly connected to the upper parts of the outer walls on both sides of the middle liquid collecting trough plate.
3. A distillation column according to claim 2, characterized in that: A plugging cap (21) is horizontally covered on the top of the air jacking pipe (13). A floating rod (22) is vertically fixedly connected to the middle of the bottom surface of the plugging cap (21). The rod body of the floating rod (22) is movably inserted into the air jacking pipe (13) and extends out from the bottom of the air jacking pipe (13).
4. A distillation column according to claim 3, characterized in that: A horizontal bar (24) is fixedly connected to the middle of the through hole between the air jacking pipes (13). A fixing column (25) is vertically arranged in the middle of the top surface of the horizontal bar (24). A sealing plate (23) is horizontally and movably sealed in the bottom of the through hole. A storage cavity is opened inside the fixing column (25). An activity plate is horizontally movably arranged in the storage cavity. A suspension rod (26) is vertically fixedly connected to the middle of the bottom surface of the activity plate. The bottom end of the suspension rod (26) movably penetrates below the bottom surface of the horizontal bar (24) and is fixedly connected to the top surface of the sealing plate (23); A return spring (27) is movably sleeved on the rod body of the suspension rod (26) inside the storage cavity.
5. A distillation column according to claim 4, characterized in that: There is a flow port for liquid and gas to pass through between the flow guiding plate (9) and the lower flow blocking plate (8). A confluence plate (28) is fixedly connected to one side above the flow port at the top of the distillation column (2), and the suspended end of the confluence plate (28) is in an arc shape bent downward; The confluence plate (28) is located below the recovery pipe (6).
6. A process for recovering bromine using the distillation column according to claim 5, characterized in that, including the following steps: S1, First, the heater (3) and the pump (4) are respectively electrically connected to an external control device through wires. Then, raw material brine is injected into the bottom of the distillation column (2), and the raw material brine submerges the electric heating wire (7). Then, the pump (4) is started to transport a part of the raw material brine inside the distillation column (2) to the flow blocking plate (8) in the middle of the distillation column (2). It is convenient to intercept the raw material brine on the flow blocking plate (8) under the action of the overflow plate (10). When the liquid level of the raw material brine on this flow blocking plate (8) exceeds the height of the overflow plate (10), the raw material brine on this flow blocking plate (8) will fall through the flow port onto the next flow blocking plate (8) and fill the liquid storage space on the next flow blocking plate (8); After filling the liquid storage spaces on the two lower flow blocking plates (8), the liquid injection operation of the pump (4) can be stopped; S2. Then, start the electric heating wire (7) to heat and evaporate the raw brine. When the rising steam passes through the baffle plate (8) without raw brine injected, the steam will rise through the flow-through port. When the steam continues to rise through the lower docking plate (12), when the air pressure is low, the steam at this time will not lift the plugging cap (21) inside the air jacking pipe (13), which is convenient for the steam to accumulate pressure. After that, it reduces the impurities mixed in the rising process of the steam. When the air pressure of the steam reaches a certain level, the steam will lift the plugging cap (21) and drive the floating rod (22) to rise. Then, the steam is discharged into the middle part of the distillation column (2) through the air jacking pipe (13). S3. After the steam rises to the middle part of the distillation column (2) and encounters the baffle plate (8) with raw brine injected, this baffle plate (8) is injected with raw brine, and it is not easy for the steam to rise through the flow-through port between this baffle plate (8) and the overflow plate (10). At this time, the steam will enter the inside of the air guide pipe (11) and enter the inside of the connecting pipe (16) through the diversion cover (17). Since the buoyancy block (15) sinks in the raw brine on the baffle plate (8) at this time, only after the air pressure of the steam increases again, the buoyancy block (15) is pushed by the air pressure of the steam to rise. The rising of the buoyancy block (15) drives the connecting pipe (16) to rise. The rising connecting pipe (16) makes the one-way air outlet valve pipe rise out of the air guide pipe (11). Then, the steam inside the connecting pipe (16) is discharged into the raw brine on this baffle plate (8) through the one-way air outlet valve pipe. By the steam entering the raw brine, it is convenient to wash the impurities inside the steam, further improving the purification effect on the steam. S4. After the steam rises through the baffle plate (8) with raw brine, the steam continues to rise and will pass through the baffle plate (8) without raw brine injected again. Then, the steam will rise to the top of the distillation column (2) through the gap between the confluence plates (14). And at this time, the steam will form distilled water on the inner wall of the top of the distillation column (2). Then, part of the distilled water will fall into the liquid collection trough plate on the confluence plate (14). When the liquid in the liquid collection trough plate is full, the distilled water in the liquid collection trough plate will be on the lower baffle plate (8). Then, as the distilled water continues to increase, the storage spaces on each baffle plate (8) will be filled in turn, so as to play a role in purifying, filtering and washing the impurities in the steam for multiple times. S5. The chlorine gas in the steam after being purified, filtered and washed for multiple times is recovered through the recovery pipe (6), realizing the continuous operation of the bromine distillation process. At the same time, since the raw brine is used to recover and recycle the discharged distillation heat and distilled water, the consumption of steam and chlorine gas is greatly reduced, the production cost is reduced, the bromine production rate is increased, and the gas emission is reduced.
Citation Information
Patent Citations
Glycollic acid preparation device adopting methyl glycolate hydrolysis method
CN216149699U
split tower baffle
FR1395111A