Multi-stage distillation device for metal purification

Abstract

The utility model relates to the technical field of distillation equipment, in particular to a multi-stage distillation device for metal purification, which comprises a tower body, and a first heating cavity, a second heating cavity and a liquid storage cavity are sequentially formed in the tower body from top to bottom; electric heating tubes for heating sewage for distillation are fixed at the inner bottoms of the first heating cavity and the second heating cavity; condensing parts for condensing steam are arranged on two sides of the tower body; through the arrangement of the tower body and the condensation part, the design ensures the effect of purifying rubidium and cesium elements through multi-stage distillation treatment on rubidium and cesium-containing wastewater; meanwhile, the first heating cavity, the second heating cavity and the liquid storage cavity are integrally designed, so that the occupied area of the equipment is small, the site lease and space utilization cost is saved, the layout flexibility of the equipment is improved, the equipment can adapt to production sites of different scales, the practicability and adaptability of the equipment are enhanced, and the production efficiency is improved. And efficient development of rubidium and cesium recovery work is powerfully promoted.

Description

TECHNICAL FIELD

[0001] The utility model relates to distillation equipment technical field, concretely for the multistage distillation device for metal purification. BACKGROUND

[0002] In the production process of high-purity rubidium metal, rubidium chloride is often used as a key raw material. Usually, rubidium chloride is converted into rubidium metal by adopting metal calcium reduction combined with vacuum roasting process. However, the raw materials used in this process are mostly secondary materials containing zinc, which have very high chloride ion content and are rich in multiple metal elements such as rubidium, cesium, potassium, sodium and lithium. The discharge amount of industrial wastewater containing rubidium and cesium elements is large. If it is directly discharged into the ecological environment without effective treatment, it will cause serious pollution to soil, water and other environments and destroy the ecological balance. Therefore, efficient recovery and purification of rubidium and cesium elements from wastewater containing rubidium and cesium can not only solve the problem of environmental pollution, but also alleviate the situation of rubidium and cesium resource shortage, which has significant environmental and economic benefits. At present, distillation method is a commonly used technology for recovering and purifying rubidium and cesium metals from wastewater containing rubidium and cesium.

[0003] The utility model discloses a kind of three chloroacetone production multistage distillation towers, and the three chloroacetone production multistage distillation tower includes distillation tank, the side wall of the distillation tank is connected with cooling pipe, one end of the cooling pipe is connected with filter tank, one side of the filter tank is connected with flow guide pipe, one end of the flow guide pipe is connected with collection tank, the top of the collection tank is inserted with ceramic filter element, the top of the ceramic filter element is fixed with sealing cover, the top of the filter tank is fixed with mounting ring, limit assembly is arranged between the sealing cover and the mounting ring. The liquid evaporated in the distillation tank is filtered by the filter tank, which has good impurity removal effect. The filtered liquid is collected by the collection tank, which facilitates the subsequent recovery of the liquid and improves the processing efficiency. The sealing cover and the mounting ring are fixedly connected by the limit assembly, which facilitates the disassembly and cleaning of the ceramic filter element in the later period and is convenient to maintain.

[0004] Although the three chloroacetone production multistage distillation tower has the advantage of convenient maintenance, the device still has the following problems in actual use: the device uses distillation tank, filter tank and collection tank to cooperate with each other to carry out distillation treatment on raw materials. However, this design mode has a low degree of integration, and each tank body is relatively independent, which not only increases the connecting pipelines and supporting facilities between devices, but also leads to a large overall equipment footprint. This not only has high requirements for production site space, but also limits the layout and installation of equipment in some limited production environments, thereby affecting the smoothness and efficiency of the production process. Therefore, we propose a multistage distillation device for metal purification. UTILITY MODEL CONTENTS

[0005] The utility model discloses a multistage distillation device for metal purification, which is used to solve the problems in the prior art.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] The multistage distillation device for metal purification comprises a tower body, a first heating cavity, a second heating cavity and a liquid storage cavity are sequentially arranged in the tower body from top to bottom, an electric heating tube for heating sewage for distillation is fixed to the inner bottom of the first heating cavity and the second heating cavity, a cover body is installed on the top of the tower body, a feeding port is fixed to the top of the cover body and is communicated with the first heating cavity, a first exhaust port is installed on the upper part of the outer wall of the tower body and is communicated with the first heating cavity, a first connecting port and a second exhaust port are installed on the outer wall of the tower body near the middle part and are both communicated with the second heating cavity, and a second connecting port is installed on the outer wall of the tower body near the bottom and is communicated with the liquid storage cavity.

[0008] Condensing parts for condensing steam are arranged on the two sides of the tower body, the condensing part comprises a hollow tank body, a spiral condensing pipe is arranged in the tank body, an air inlet pipe is fixed to the top end of the condensing pipe and is communicated with the corresponding first exhaust port and second exhaust port, a liquid outlet pipe is fixed to the bottom end of the condensing pipe and is communicated with the corresponding first connecting port and second connecting port, and a water inlet port and a water outlet port are installed on the outer wall of the tank body on the upper side and the lower side and are both communicated with the inside of the tank body.

[0009] As a preferred technical scheme of the utility model, a first stirring shaft is rotatably installed in the first heating cavity, a plurality of first stirring blades are coaxially connected to the outer wall of the first stirring shaft through a key, a transmission block is coaxially fixed to the bottom end of the first stirring shaft, a second stirring shaft is rotatably installed in the second heating cavity, the top end of the second stirring shaft penetrates into the first heating cavity, a transmission groove is formed in the top end of the second stirring shaft and is matched with the transmission block, a plurality of second stirring blades are coaxially connected to the outer wall of the second stirring shaft through a key, a motor is installed on the top of the cover body, and the output shaft of the motor is coaxially connected to the top end of the first stirring shaft through a key.

[0010] As a preferred technical scheme of the utility model, a support plate is fixedly connected to the outer wall of the tank body through bolts, and the distal end of the support plate is fixedly connected to the outer wall of the tower body through bolts.

[0011] As a preferred technical scheme of the utility model, the cross section of the liquid outlet pipe is in an L shape, and a control valve is arranged on the outside of the liquid outlet pipe.

[0012] As a preferred technical scheme of the utility model, a discharge pipe is installed on the bottom of the tower body and is communicated with the liquid storage cavity, and an unloading valve is installed on the outside of the discharge pipe.

[0013] As a preferred technical scheme of the utility model, the outer wall of the tower body is further provided with a blowdown opening in communication with the first heating cavity, and a plug is threadedly connected to the end opening of the blowdown opening.

[0014] As a preferred technical scheme of the utility model, the rear side of the tower body is provided with a feed lifting assembly for feeding sewage into the tower body, which comprises a box body with an open top, and a detachable filter assembly is mounted at the opening of the box body.

[0015] As a preferred technical scheme of the utility model, the filter assembly comprises a plurality of frames distributed in the vertical direction, the frames are inserted into the opening of the box body, a filter screen for filtering sewage is fixed in the opening of the frame, and a connecting plate is fixedly connected between two adjacent frames by bolts.

[0016] As a preferred technical scheme of the utility model, the cross section of the hook is J-shaped, and the hook is fixedly connected with the frame by bolts.

[0017] Compared with the prior art, the utility model has the advantages of:

[0018] When purifying rubidium and cesium elements from the wastewater containing rubidium and cesium, the wastewater containing rubidium and cesium is fed into the first heating cavity, and the wastewater containing rubidium and cesium in the first heating cavity is heated under the action of the electric heating tube, so that the wastewater containing rubidium and cesium is evaporated to form steam, the steam enters the upper condensing part, and the wastewater containing rubidium and cesium is condensed under the action of the condensing tube to form condensed liquid containing rubidium and cesium, which then enters the second heating cavity and is heated again under the action of the electric heating tube, so that the condensed water containing rubidium and cesium is evaporated again to form steam, the steam enters the lower condensing part, and the condensed liquid containing rubidium and cesium is formed under the action of the condensing tube and can be directly discharged into the liquid storage cavity for collection. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an overall structure schematic view of the utility model embodiment 1.

[0020] Figure 2 It is the overall structure sectional view of the embodiment 1 of the utility model;

[0021] Figure 3 It is the structure sectional view of the tower body in the embodiment 1 of the utility model;

[0022] Figure 4 It is the partial explosion structure schematic diagram in the embodiment 1 of the utility model;

[0023] Figure 5 It is the structure sectional view of the condensing part in the embodiment 1 of the utility model;

[0024] Figure 6 It is the structure sectional view of the feeding lifting assembly in the embodiment 2 of the utility model;

[0025] Figure 7 It is the structure schematic diagram of the filtering assembly in the embodiment 2 of the utility model;

[0026] In the drawing,

[0027] 1, tower body;10, first heating cavity;100, first exhaust port;11, second heating cavity;110, second exhaust port;111, first connecting port;12, liquid storage cavity;120, second connecting port;13, discharge pipe;130, discharge valve;14, cover body;15, feeding port;16, blowdown port;17, motor;18, first stirring shaft;180, first stirring blade;181, transmission block;19, second stirring shaft;190, transmission groove;191, second stirring blade;

[0028] 2, condensing part;20, support plate;21, tank body;22, water inlet;23, drain port;24, condensing pipe;25, air inlet pipe;26, liquid discharge pipe;27, control valve;

[0029] 3, feeding lifting assembly;30, box body;31, pump body;32, liquid supply pipe;33, frame;330, filter screen;34, connecting plate;35, hook. DETAILED DESCRIPTION

[0030] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0031] Embodiment 1

[0032] Please refer to Figures 1-5As shown, the multistage distillation device for metal purification comprises a tower body 1, which is internally provided with a first heating cavity 10, a second heating cavity 11 and a liquid storage cavity 12 from top to bottom; the inner bottom of the first heating cavity 10 and the second heating cavity 11 is fixed with an electric heating tube for heating sewage for distillation; the top of the tower body 1 is provided with a cover body 14, the top of which is fixed with a feeding port 15 connected with the first heating cavity 10; the upper part of the outer wall of the tower body 1 is provided with a first exhaust port 100 connected with the first heating cavity 10; the outer wall of the tower body 1 is provided with a first connecting port 111 and a second exhaust port 110 near the middle part, both of which are connected with the second heating cavity 11; the outer wall of the tower body 1 is provided with a second connecting port 120 near the bottom, which is connected with the liquid storage cavity 12; both sides of the tower body 1 are provided with a condensing part 2 for condensing steam, which comprises a hollow tank body 21, the inside of which is provided with a spiral condensing pipe 24, the top end of which is fixed with an air inlet pipe 25, which is connected with the corresponding first exhaust port 100 and second exhaust port 110, and the bottom end of the condensing pipe 24 is fixed with a liquid outlet pipe 26, which is connected with the corresponding first connecting port 111 and second connecting port 120; the outer wall of the tank body 21 is provided with a water inlet port 22 and a water outlet port 23 on the upper and lower sides, which are connected with the inside of the tank body 21.

[0033] Further, the first heating cavity 10 is rotatably provided with a first stirring shaft 18, the outer wall of which is coaxially connected with a plurality of first stirring blades 180, and the bottom end of the first stirring shaft 18 is coaxially fixed with a transmission block 181; the second heating cavity 11 is rotatably provided with a second stirring shaft 19, the top end of which penetrates into the first heating cavity 10, the top end of the second stirring shaft 19 is provided with a transmission groove 190 which is inserted and matched with the transmission block 181, and the outer wall of the second stirring shaft 19 is coaxially connected with a plurality of second stirring blades 191; the top of the cover body 14 is provided with a motor 17, the output shaft of which is coaxially connected with the top end of the first stirring shaft 18. Through the cooperation of the transmission block 181 and the transmission groove 190, the two first stirring shafts 18 and the second stirring shaft 19 can be driven to rotate synchronously, so that the sewage in the first heating cavity 10 and the second heating cavity 11 is heated more uniformly, and the distillation process is accelerated.

[0034] In this embodiment, the outer wall of the tank body 21 is fixedly connected with a support plate 20 through bolts, and the end of the support plate 20 is fixedly connected with the outer wall of the tower body 1 through bolts. The support plate 20 plays a role of stable support, ensures the stable connection of the condensing part 2 with the tower body 1, avoids the influence of factors such as vibration on the condensing effect during operation, and guarantees the normal and stable operation of the equipment.

[0035] In the embodiment, the cross-sectional shape of the drain pipe 26 is L-shaped, and the outer portion of the drain pipe 26 is provided with a control valve 27. The L-shaped design facilitates the connection of the drain pipe 26 with the first connecting port 111 and the second connecting port 120, and the control valve 27 can flexibly control the discharge of the condensed liquid, which can be adjusted according to the actual processing situation, thereby improving the flexibility and controllability of the operation of the equipment.

[0036] In the embodiment, the bottom of the tower body 1 is provided with a discharge pipe 13 communicating with the liquid storage cavity 12, and the outer portion of the discharge pipe 13 is provided with a discharge valve 130. The discharge valve 130 can be used to conveniently control the discharge of the liquid in the liquid storage cavity 12, which facilitates the collection and treatment of the liquid containing rubidium and cesium, and also facilitates the cleaning and maintenance of the equipment.

[0037] In the embodiment, the outer wall of the tower body 1 is further provided with a blowdown port 16 communicating with the first heating cavity 10, and a plug is threadedly connected to the opening end of the blowdown port 16. By opening the plug, the impurities and dirt in the second heating cavity 11 can be discharged through the blowdown port 16, thereby meeting the production requirements.

[0038] It can be understood that the tower body 1 in the embodiment can also be provided with a temperature sensor, a liquid level sensor, and a pressure sensor during use, which can monitor the temperature, liquid level, and pressure of the tower body 1 in real time. The temperature sensor can ensure the accuracy of the heating process and prevent overheating or insufficient temperature; the liquid level sensor can prevent liquid overflow or insufficient liquid; and the pressure sensor can ensure that the tower body 1 operates within a safe pressure range, thereby improving the safety and processing effect of the equipment.

[0039] Further, the second stirring shaft 19 is provided with a mechanical seal at the partition plate between the first heating cavity 10 and the second heating cavity 11, which can effectively prevent liquid leakage between the first heating cavity 10 and the second heating cavity 11. The mechanical seal includes a dynamic ring and a static ring, the dynamic ring rotates with the second stirring shaft 19, and the static ring is fixed to the partition plate, and the two tightly fit to form a sealing surface. The mechanical seal not only has excellent sealing performance, but also has little resistance to the rotation of the second stirring shaft 19, which can ensure stable operation of the equipment, prolong the service life of the equipment, and reduce maintenance costs.

[0040] In specific use, the user first adds the wastewater containing rubidium and cesium into the first heating cavity 10 through the feeding port 15, at this time, the user connects the power supply of the electric heating tube in the first heating cavity 10, the electric heating tube heats the wastewater containing rubidium and cesium, the heated wastewater containing rubidium and cesium is boiled and evaporated, and the high-temperature steam enters the gas inlet pipe 25 and the condenser pipe 24 above the first exhaust port 100 at the same time. Since the cooling water source flows in the tank body 21, the temperature of the condenser pipe 24 is low, the high-temperature steam entering the condenser pipe 24 is cooled and condensed to form condensed water, and the condensed water enters the second heating cavity 11 through the liquid outlet pipe 26 at the same time. When the distillation in the first heating cavity 10 is completed, the user closes the control valve 27, at this time, the user connects the power supply of the electric heating tube in the second heating cavity 11, the electric heating tube heats the condensed water containing rubidium and cesium, the heated condensed water containing rubidium and cesium is boiled and evaporated again, and the high-temperature steam enters the gas inlet pipe 25 and the condenser pipe 24 below the second exhaust port 110 at the same time. Since the cooling water source flows in the tank body 21, the temperature of the condenser pipe 24 is low, the high-temperature steam entering the condenser pipe 24 is cooled and condensed to form condensed water again, and the condensed water enters the storage cavity 12 through the liquid outlet pipe 26 below at the same time, and the distillation and purification of the wastewater containing rubidium and cesium are completed.

[0041] Example 2

[0042] Please refer to Figures 6-7 As shown in the drawings, in order to improve the convenience of feeding, the embodiment provides the following technical scheme on the basis of example 1: the rear side of the tower body 1 is provided with a feeding lifting assembly 3 for feeding sewage into the tower body 1, the feeding lifting assembly 3 includes a box body 30 in the form of a top opening, a detachable filter assembly is installed at the opening of the box body 30; the inner bottom of the box body 30 is fixed with a pump body 31, a liquid supply pipe 32 is installed at the liquid outlet of the pump body 31, and the distal end of the liquid supply pipe 32 penetrates through the outer wall of the box body 30 and is connected with the feeding port 15. The pump body 31 in the box body 30 of the feeding lifting assembly 3 cooperates with the liquid supply pipe 32 to feed the sewage into the tower body 1. This structure can realize automatic transportation of sewage, improve feeding efficiency, ensure that the sewage continuously and stably enters the tower body 1 for treatment, reduce manual operation, and improve overall processing efficiency.

[0043] Further, the filter assembly comprises a plurality of frames 33 distributed in the vertical direction, the frames 33 are inserted into the openings of the box 30, the openings of the frames 33 are fixed with filter screens 330 for filtering sewage, and the adjacent two frames 33 are connected by a connecting plate 34 fixed by bolts. The top end of the frame 33 at the top is fixed with two hooks 35, and the hooks 35 are hung at the top edge of the box 30. Suspended particles and impurities will affect the heat and mass transfer effect in the distillation process. It is possible to form dirt on the heat transfer surface inside the tower body 1, reduce the heat transfer efficiency, and make the distillation process consume more energy to achieve the same separation effect. In addition, impurities may also interfere with the gas-liquid balance and affect the separation efficiency of distillation. By filtering out impurities, the distillation process can be smoother, improve the distillation efficiency, and reduce energy consumption.

[0044] In the embodiment, the cross-sectional shape of the hook 35 is J-shaped, and the hook 35 is fixedly connected with the frame 33 by bolts. The J-shaped design facilitates hanging, and the fixed mode of hanging has the advantage of convenient disassembly, and through the detachable design, the filter screen 330 can be easily cleaned and replaced. At the same time, the bolt fixing mode ensures the connection reliability between the hook 35 and the frame 33.

[0045] It should be noted that the size of the frame 33 is matched with the size of the opening of the box 30, and the filter screen 330 is fixedly connected with the frame 33 by bolts; the size matching makes the frame 33 tightly installed at the opening of the box 30, preventing unfiltered sewage from flowing into the gap. The filter screen 330 is fixed with the frame 33 by bolts, which is firmly installed and easy to disassemble.

[0046] It is worth noting that the pump body 31 in the embodiment is a conventional technology, which will not be described here.

[0047] In specific use, the user first pours the wastewater containing rubidium and cesium into the top opening of the box 30, and the wastewater containing rubidium and cesium enters the box 30 and successively passes through a plurality of filter screens 330 in the falling process, so that large-particle impurities in the wastewater containing rubidium and cesium are filtered out. The filtered wastewater falls at the bottom of the box 30, and then the user connects the power supply of the pump body 31, and the pump body 31 starts to work, at which time the wastewater containing rubidium and cesium enters the first heating cavity 10 through the liquid supply pipe 32.

[0048] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-stage distillation apparatus for metal purification, characterized by: The application relates to a sewage distillation tower, which comprises a tower body (1), a first heating cavity (10), a second heating cavity (11) and a liquid storage cavity (12) are sequentially arranged in the tower body (1) from top to bottom, an electric heating tube for heating sewage for distillation is fixed to the inner bottom of the first heating cavity (10) and the second heating cavity (11), a cover body (14) is arranged at the top of the tower body (1), a feeding opening (15) is fixed to the top of the cover body (14) and is communicated with the first heating cavity (10), a first exhaust opening (100) is arranged on the upper portion of the outer wall of the tower body (1) and is communicated with the first heating cavity (10), a first connecting opening (111) and a second exhaust opening (110) are arranged on the outer wall of the tower body (1) near the middle portion and are communicated with the second heating cavity (11), and a second connecting opening (120) is arranged on the outer wall of the tower body (1) near the bottom and is communicated with the liquid storage cavity (12). Condensing parts (2) for condensing steam are arranged on the two sides of the tower body (1), the condensing part (2) comprises a hollow tank body (21), a spiral condensing pipe (24) is arranged in the tank body (21), an air inlet pipe (25) is fixed to the top end of the condensing pipe (24), the air inlet pipe (25) is communicated with the corresponding first exhaust opening (100) and second exhaust opening (110) and is located at the lower portion, a liquid outlet pipe (26) is fixed to the bottom end of the condensing pipe (24), the liquid outlet pipe (26) is communicated with the corresponding first connecting opening (111) and second connecting opening (120), and a water inlet (22) and a water outlet (23) are arranged on the outer wall of the tank body (21) on the upper and lower sides and are communicated with the inside of the tank body (21).

2. The multi-stage distillation apparatus for metal purification according to claim 1, characterized by: A first stirring shaft (18) is rotatably arranged in the first heating cavity (10), a plurality of first stirring blades (180) are coaxially and key-connected to the outer wall of the first stirring shaft (18), a transmission block (181) is coaxially fixed to the bottom end of the first stirring shaft (18), a second stirring shaft (19) is rotatably arranged in the second heating cavity (11), the top end of the second stirring shaft (19) penetrates into the first heating cavity (10), a transmission groove (190) is arranged on the top end of the second stirring shaft (19) and is matched with the transmission block (181), a plurality of second stirring blades (191) are coaxially and key-connected to the outer wall of the second stirring shaft (19), a motor (17) is arranged on the top of the cover body (14), and the output shaft of the motor (17) is coaxially and key-connected to the top end of the first stirring shaft (18).

3. The multi-stage distillation apparatus for metal purification according to claim 1, characterized by: A supporting plate (20) is fixedly connected to the outer wall of the tank body (21) through bolts, and the end of the supporting plate (20) is fixedly connected to the outer wall of the tower body (1) through bolts.

4. The multi-stage distillation apparatus for metal purification according to claim 1, characterized by: The cross section of the liquid outlet pipe (26) is in L shape, and a control valve (27) is arranged on the outer portion of the liquid outlet pipe (26).

5. The multi-stage distillation apparatus for metal purification according to claim 1, characterized by: A discharge pipe (13) is arranged at the bottom of the tower body (1) and is communicated with the liquid storage cavity (12), and a discharge valve (130) is arranged on the outer portion of the discharge pipe (13).

6. The multi-stage distillation apparatus for metal purification according to claim 1, characterized by: The outer wall of the tower body (1) is further provided with a blowdown opening (16) communicated with the first heating cavity (10), and a plug is threadedly connected to the end opening of the blowdown opening (16).

7. The multi-stage distillation apparatus for metal purification according to claim 1, characterized by: The rear side of the tower body (1) is provided with a feeding lifting assembly (3) for feeding sewage into the tower body (1), the feeding lifting assembly (3) comprises a box (30) with an open top, and a detachable filter assembly is arranged at the opening of the box (30); the inner bottom of the box (30) is fixedly provided with a pump body (31), the liquid outlet of the pump body (31) is provided with a liquid supply pipe (32), and the end of the liquid supply pipe (32) penetrates through the outer wall of the box (30) and is communicated with the feeding opening (15).

8. The multi-stage distillation apparatus for metal purification according to claim 7, characterized by: The filter assembly comprises a plurality of frames (33) distributed in the vertical direction, the frames (33) are inserted into the opening of the box (30), the opening of the frame (33) is fixedly provided with a filter screen (330) for filtering sewage, and the adjacent two frames (33) are fixedly connected by a connecting plate (34) through bolts; the top end of the frame (33) at the top is fixedly provided with two hooks (35), and the hooks (35) are hung on the top edge of the box (30).

9. The multi-stage distillation apparatus for metal purification according to claim 8, characterized by: The cross section of the hook (35) is J-shaped, and the hook (35) is fixedly connected with the frame (33) through bolts.

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