Boron carbide smelting flue gas boron gangue recovery equipment and recovery method thereof

Abstract

The invention relates to the technical field of boron carbide production, in particular to boron carbide smelting off-gas boron gangue recovery equipment and a recovery method thereof.The boron carbide smelting off-gas boron gangue recovery equipment comprises a horizontal tank body, a separation cavity and a dissolution cavity are formed in the horizontal tank body; a flue gas inlet is formed in the top of the separation cavity, a collecting tank and an isolation cover are arranged at the bottom of the separation cavity, and after settling separation of flue gas and large-particle impurities is conducted in the separation cavity, the isolation cover covers the collecting tank; a dialysis membrane is arranged at a liquid outlet of the dissolving cavity; the centrifugal pump is used for sucking a boron gangue solution for dissolving flue gas in the separation cavity into the dissolving cavity; the filter pressing piece is arranged in the dissolving cavity, and when the filter pressing piece moves towards the dialysis membrane, the boron gangue solution is subjected to filter pressing and dialysis to pass through the dialysis membrane, so that the boron gangue solution is separated from the small-particle impurities. Settling separation and filter pressing dialysis of impurities in the flue gas are sequentially carried out in the separation cavity and the dissolving cavity, the boron gangue solution with the high purity is obtained, the high boron gangue obtaining rate is achieved, environmental pollution caused by boron gangue discharging is avoided, and the boron gangue recycling benefit is improved.

Description

Technical Field

[0001] The invention relates to the technical field of boron carbide production, and in particular to boron gangue recovery equipment and a recovery method thereof for boron carbide smelting flue gas. Background Art

[0002] Boron carbide is a non-metallic refractory compound, with B4C as the most commonly used product. It is one of the superhard artificial abrasives, second only to diamond in hardness. It is suitable for grinding, has stable physical and chemical properties, is light in weight, has good grinding performance, and is almost unreactive with acids and alkalis. It also has semiconductor properties and neutron absorption properties, making it an ideal substitute for diamond. Boron carbide powder and boron carbide products are widely used in aviation, military industry, nuclear industry, wear-resistant, refractory materials and other fields.

[0003] At present, the main raw materials for producing boron carbide are boric acid and carbon materials. These raw materials are mixed and put into a high-power three-phase programmable arc refining furnace for smelting.

[0004] During the smelting process of boron carbide, a large amount of flue gas will be generated. For every ton of boron carbide produced, 1.3 tons of flue gas will be generated, and it will carry high-temperature gas of several hundred degrees. Direct emission will inevitably cause environmental pollution.

[0005] At present, in the art, the flue gas is filtered by bag filtration, so that the solid boron-containing B2O3 in the flue gas that is larger than the bag filtration accuracy is separated and passed into water to become a boron ore solution. The boron ore solution is then filtered to separate impurities and obtain a boron ore solution with higher purity. The boron ore solution is then cooled and crystallized to remove moisture to obtain boric acid with higher purity.

[0006] However, the problem with the above method is that the acquisition rate of boron monoxide (B2O3) is low. Specifically, about 80% of the solid boron monoxide (B2O3) with a particle diameter smaller than the filter accuracy of the bag cannot be collected by the bag and is then discharged to cause environmental pollution.

[0007] In view of this, the present invention is proposed. Summary of the invention

[0008] To this end, the present invention provides a boron gangue recovery device and a recovery method for boron carbide smelting flue gas. By passing unfiltered flue gas containing boron gangue into a separation chamber and a dissolution chamber of the recovery device, sedimentation separation and pressure filtration and dialysis of impurities in the flue gas are carried out in sequence to obtain a boron gangue solution with high purity, thereby achieving a high acquisition rate of boron gangue in the flue gas, thereby avoiding environmental pollution caused by boron gangue emissions and improving the recovery and utilization efficiency of boron gangue.

[0009] The present invention also crushes small particles of impurities by cooperating with the crushing sheets of the filter press and the crushing ribs of the horizontal tank body, thereby preventing the impurities, which are large in volume and small in power, from adhering to the dialysis membrane and being difficult to separate from the dialysis membrane with the water flow, causing blockage of the dialysis membrane.

[0010] To achieve the above object, the present invention provides a boron gangue recovery device for boron carbide smelting flue gas, comprising:

[0011] A horizontal tank body is provided with a separation chamber and a dissolution chamber which are interconnected; the top of the separation chamber is provided with a smoke inlet, and the bottom is provided with a collecting tank and an isolation cover. After the separation chamber performs sedimentation separation of smoke and large particle impurities, the isolation cover covers the collecting tank to isolate the large particle impurities in the collecting tank; the dissolution chamber is provided with a liquid outlet, and the liquid outlet is provided with a dialysis membrane;

[0012] A centrifugal pump, used to suck the boron ore solution dissolved in the flue gas in the separation chamber into the dissolution chamber;

[0013] A filter press is arranged in the dissolving chamber, a rolling sheet is obliquely arranged on the side wall of the filter press, and at least two spirally arranged rolling ribs are provided on the side wall of the dissolving chamber;

[0014] When the filter press rotates, different areas of the rolling sheet contact the rolling ribs in sequence along the inclined direction thereof, so as to crush small particle impurities in the boron waste solution that have not been settled and separated in the separation chamber;

[0015] When the filter press moves toward the dialysis membrane, the boron ore solution is filter-filtered and dialyzed through the dialysis membrane to separate the boron ore solution from small particle impurities.

[0016] Furthermore, the separation chamber, the dissolution chamber and the dialysis membrane are all horizontally arranged in a straight line, the installation chamber of the centrifugal pump is arranged on the side of the dialysis membrane away from the dissolution chamber, and the opening of the pumping chamber of the centrifugal pump is sealed and connected to the dialysis membrane;

[0017] The smoke inlet is provided with a three-way valve, and the different inlets of the three-way valve are switched to switch the introduction of smoke or water into the separation chamber;

[0018] When the filter press moves toward the dialysis membrane to perform filter press dialysis of the boron ore solution, the three-way valve is closed, the separation chamber and the dissolution chamber form a sealed chamber, and the pumping chamber of the centrifugal pump generates negative pressure to accelerate the filter press dialysis rate of the boron ore solution.

[0019] Furthermore, an impeller assembly for generating negative pressure is provided in the pump suction chamber;

[0020] The center of the filter press is provided with a rotating shaft for driving the filter press to rotate, and the side of the filter press in contact with the dialysis membrane is a filter press plate provided with through holes;

[0021] A connector for controlling whether the impeller assembly is connected to the rotating shaft is disposed on the driving shaft of the impeller assembly. When the driving shaft is connected to the rotating shaft and rotates, the filter press is at least pushed by the boron oxide solution.

[0022] Furthermore, a liquid inlet plate is arranged on one side of the filter press facing the separation chamber, and a liquid inlet with a diameter gradually reduced along its axial direction is arranged on the liquid inlet plate;

[0023] The liquid inlet is used to accelerate the passing speed of the boron oxide solution to generate thrust on the liquid inlet plate.

[0024] In particular, the filter press accelerates the rate at which the boron oxide solution is filtered and dialyzed through the dialysis membrane.

[0025] Furthermore, a driving assembly is provided in the separation chamber, and the driving assembly is connected to the liquid inlet plate and is used to push the filter press to move toward the dialysis membrane.

[0026] Further, the driving assembly is a magnetic assembly, including a variable fluxer and a magnetic attraction portion that are in contact and separated from each other;

[0027] The variable magnetic flux device is arranged on the side wall of the separation chamber away from the liquid inlet plate, and the magnetic attraction part is fixedly connected to the liquid inlet plate.

[0028] In particular, the separation chamber can not only realize the sedimentation separation of flue gas and large particle impurities, but also be used to generate power to push the filter press to perform pressure filtration and dialysis, thus realizing multiple uses of one chamber.

[0029] The present invention also provides a method for recovering boron gangue from boron carbide smelting flue gas, comprising the following steps:

[0030] Step S1, after the flue gas is introduced into the separation chamber, the separation chamber and the dissolution chamber are kept in a static state for a first set time period, so as to perform sedimentation separation of the flue gas and large particle impurities in the separation chamber;

[0031] Step S2, after the isolation cover covers the collection tank, liquid is introduced into the separation chamber to form a boron ore solution for dissolving the flue gas, and the filter press rotates to crush small particle impurities in the boron ore solution that have not been settled and separated in the separation chamber;

[0032] Step S3, the filter press moves toward the dialysis membrane to filter and dialyze the boron oxide solution through the dialysis membrane.

[0033] Further, in the step S2, the centrifugal pump is turned on at a first centrifugal speed, and the centrifugal pump sucks most of the boron oxide solution into the dissolution chamber;

[0034] In step S3, the centrifugal pump is started at a second centrifugal speed greater than the first centrifugal speed, and the centrifugal pump completely sucks the boron oxide solution through the dialysis membrane.

[0035] Furthermore, a connector is provided on the driving shaft of the centrifugal pump to control whether it is connected to the filter press;

[0036] The step S2 comprises:

[0037] Step S21, during the second set time, the connector is not connected to the filter press, and the centrifugal pump is kept turned on at the first centrifugal speed to suck most of the boron oxide solution into the dissolution chamber;

[0038] Step S22: During the third set time, the connector is connected to the filter press, and the centrifugal pump is kept turned on at a first centrifugal speed to crush the small particle impurities.

[0039] Furthermore, a driving assembly is provided in the separation chamber, and the driving assembly is a magnetic assembly, including a variable fluxer and a magnetic attraction portion that are in contact and separated from each other;

[0040] In step S3, the variable flux device cyclically maintains the first magnetism and the second magnetism, the first magnetism repels the magnetic attraction portion and pushes the filter press away, and the second magnetism attracts the magnetic attraction portion and attracts the filter press toward it.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. By passing the unfiltered flue gas containing boron gangue into the separation chamber and dissolution chamber of the recovery equipment, the impurities in the flue gas are separated by sedimentation and pressure filtration and dialysis are carried out in turn to obtain a boron gangue solution with high purity, thereby achieving a high acquisition rate of boron gangue in the flue gas, thereby avoiding environmental pollution caused by boron gangue emissions and improving the recovery and utilization efficiency of boron gangue.

[0043] 2. The crushing sheets of the filter press and the crushing ribs of the horizontal tank body are used to crush small particles of impurities, which prevents the impurities, which are large in size and small in power, from adhering to the dialysis membrane and being difficult to separate from the dialysis membrane with the water flow, causing blockage of the dialysis membrane.

[0044] 3. The filter press element also accelerates the rate at which the boron oxide solution is filtered and dialyzed through the dialysis membrane.

[0045] 4. By arranging a driving component in the separation chamber, the separation chamber can be used for the sedimentation separation of flue gas and large particle impurities, and can also be used to generate power to push the filter press to perform pressure filtration and dialysis, thus realizing multiple uses of one chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural schematic diagram of a boron gangue recovery device for boron carbide smelting flue gas according to an embodiment of the present invention;

[0047] Figure 2 The present invention is a schematic flow chart of a method for recovering boron gangue from boron carbide smelting flue gas according to an embodiment of the present invention.

[0048] Description of the main components in the figure: 1. Horizontal tank; 11. Smoke inlet; 12. Separation chamber; 121. Collection tank; 122. Isolation cover; 123. Accumulation of large particles; 13. Dissolution chamber; 131. Dialysis membrane; 132. Rolling ribs; 14. Installation chamber; 15. Drainage port; 16. Support legs;

[0049] 2. filter press; 21. liquid inlet plate; 211. liquid inlet; 22. rolling sheet; 221. blade; 222. convex block; 23. filter press plate; 231. through hole; 24. rotating shaft; 25. stirring blade;

[0050] 3. Centrifugal pump; 31. Connector; 32. Impeller assembly;

[0051] 4. Driving assembly; 41. Cover body; 42. Variable flux device; 43. Magnetic attraction part. DETAILED DESCRIPTION

[0052] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0053] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0054] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0055] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] like Figure 1 and 2As shown, the present invention provides a boron gangue recovery device and a recovery method for boron carbide smelting flue gas. By passing unfiltered flue gas containing boron gangue into the separation chamber 12 and the dissolution chamber 13 of the recovery device, the impurities in the flue gas are sequentially separated by sedimentation and pressure filtration and dialysis to obtain a boron gangue solution with high purity, thereby achieving a high acquisition rate of boron gangue in the flue gas, thereby avoiding environmental pollution caused by boron gangue emissions and improving the recovery and utilization efficiency of boron gangue.

[0057] The present invention also crushes small particles of impurities by cooperating with the crushing sheets of the filter press and the crushing ribs of the horizontal tank body, thereby preventing the impurities, which are large in volume and small in power, from adhering to the dialysis membrane and being difficult to separate from the dialysis membrane with the water flow, causing blockage of the dialysis membrane.

[0058] in, Figure 1 It is a structural schematic diagram of a boron gangue recovery device for boron carbide smelting flue gas according to an embodiment of the present invention; Figure 2 It is a schematic flow diagram of a method for recovering boron gangue from boron carbide smelting flue gas according to an embodiment of the present invention;

[0059] The components include a horizontal tank body 1, a smoke inlet 11, a separation chamber 12, a collecting tank 121, an isolation cover 122, a large particle impurity accumulation 123, a dissolution chamber 13, a dialysis membrane 131, a rolling rib 132, an installation chamber 14, a liquid discharge port 15, a support leg 16, a filter press 2, a liquid inlet plate 21, a liquid inlet 211, a rolling sheet 22, a blade 221, a bump 222, a filter press plate 23, a through hole 231, a rotating shaft 24, a stirring blade 25, a centrifugal pump 3, a connector 31, an impeller assembly 32, a drive assembly 4, a cover body 41, a variable flux device 42, and a magnetic attraction portion 43.

[0060] Embodiment 1

[0061] like Figure 1As shown, this embodiment proposes a boron gangue recovery device for boron carbide smelting flue gas, comprising: a horizontal tank body 1, wherein a separation chamber 12 and a dissolving chamber 13 which are interconnected are provided inside; the separation chamber 12 is provided with a flue gas inlet 11 at the top, and a collecting tank 121 and an isolation cover 122 at the bottom. After the separation chamber 12 performs sedimentation separation of flue gas and large particle impurities, the isolation cover 122 covers the collecting tank 121 to isolate the large particle impurities in the collecting tank 121; the dissolving chamber 13 is provided with a liquid outlet, and the liquid outlet is provided with a dialysis membrane 131; a centrifugal pump 3 is used to absorb the boron gangue solution dissolved in the flue gas in the separation chamber 12 into the dissolution chamber 13; the filter press 2 is arranged in the dissolution chamber 13, and a rolling sheet 22 is obliquely arranged on the side wall of the filter press 2, and the side wall of the dissolution chamber 13 has at least two spirally arranged rolling ribs 132; when the filter press 2 rotates, different areas of the rolling sheet 22 contact the rolling ribs 132 in sequence along the oblique direction thereof, so as to crush the small particle impurities in the boron ore solution that have not been precipitated and separated in the separation chamber 12; when the filter press 2 moves toward the dialysis membrane 131, the boron ore solution is filter-filtered and dialyzed through the dialysis membrane 131, so as to separate the boron ore solution and the small particle impurities.

[0062] It should be noted that the impurities described in this embodiment are compound particles of silicon, graphite and other components in untreated flue gas. The large particle impurities described in this embodiment are impurities that can naturally sink in the flue gas and separate from the flue gas under the action of gravity alone in a natural state. Specifically, their particle diameter is approximately greater than 200 microns. The particle diameter of the small particle impurities described in this embodiment is smaller than the particle diameter of the large particle impurities, and is greater than the filtration accuracy of the dialysis membrane 131. Specifically, their particle diameter is approximately less than 200 microns and greater than 10 microns. Therefore, the small particle impurities are easily clamped between the rolling sheet 22 and the rolling rib 132, and then crushed to between 30 microns and 10 microns, and will not adhere to the dialysis membrane 131.

[0063] Therefore, the recovery equipment described in this embodiment is preferably an integrated equipment for sedimentation separation and pressure filtration, and the horizontal tank body 1 is a horizontal reaction barrel with different barrel diameters.

[0064] Furthermore, the separation chamber 12, the dissolution chamber 13 and the dialysis membrane 131 are all horizontally arranged in a straight line, and the installation chamber 14 of the centrifugal pump 3 is arranged on the side of the dialysis membrane 131 away from the dissolution chamber 13, and the opening of the pumping chamber of the centrifugal pump 3 is sealed and connected to the dialysis membrane 131; the flue gas inlet 11 is provided with a three-way valve, and the different inlets of the three-way valve are switched to switch the flue gas or water into the separation chamber 12; when the filter press 2 moves toward the dialysis membrane 131 to perform pressure filtration and dialysis of the boron ore solution, the three-way valve is closed, the separation chamber 12 and the dissolution chamber 13 form a sealed chamber, and the pumping chamber of the centrifugal pump 3 generates negative pressure to accelerate the pressure filtration and dialysis rate of the boron ore solution.

[0065] Furthermore, an impeller assembly 32 for generating negative pressure is provided in the pumping chamber; a rotating shaft 24 for driving the filter press 2 to rotate is provided at the center of the filter press 2, and a filter press plate 23 having a through hole 231 is provided on the side contacting the dialysis membrane 131; a connector 31 for controlling whether it is connected to the rotating shaft 24 is provided on the driving shaft of the impeller assembly 32, and when the driving shaft is connected to the rotating shaft 24 and rotates, the filter press 2 is at least pushed by the boron ore solution.

[0066] Specifically, the plug-in connector 31 is a device that can drively connect the rotating shaft 24 of the filter press 2 to the driving shaft no matter where the filter press 2 moves along its axial direction, such as an electric snap-on buckle.

[0067] Furthermore, a liquid inlet plate 21 is arranged on the side of the filter press 2 facing the separation chamber 12 , and a liquid inlet port 211 with a diameter gradually decreasing along its axial direction is arranged on the liquid inlet plate 21 ; the liquid inlet port 211 is used to accelerate the passing speed of the boron ore solution to generate thrust on the liquid inlet plate 21 .

[0068] It can be understood that the water flow rate is faster at the position where the diameter of the liquid inlet 211 is small, and the water flow rate is slower at the position where the diameter of the liquid inlet 211 is large. Therefore, the flow rate difference through the liquid inlet 211 can push the liquid inlet plate 21, thereby reducing the energy consumption of the filter press 2.

[0069] Specifically, the opening of the liquid inlet 211 is provided with a closable and openable opening and closing member, and the opening and closing member remains closed during the sedimentation and separation process, so that the smoke is only sedimented and separated in the separation chamber 12 and does not enter the dissolution chamber 13.

[0070] In particular, the filter press 2 accelerates the rate at which the boron oxide solution is filtered and dialyzed through the dialysis membrane 131.

[0071] Furthermore, a driving assembly 4 is provided in the separation chamber 12 , and the driving assembly 4 is connected to the liquid inlet plate 21 to push the filter press 2 to move toward the dialysis membrane 131 .

[0072] Furthermore, the driving component 4 is a magnetic component, including a variable flux device 42 and a magnetic attraction portion 43 that are in contact and separated from each other; the variable flux device 42 is arranged on the side wall of the separation chamber 12 away from the liquid inlet plate 21, and the magnetic attraction portion 43 is fixedly connected to the liquid inlet plate 21.

[0073] In particular, the separation chamber 12 can not only realize the sedimentation separation of flue gas and large particle impurities, but also be used to generate power to push the filter press 2 to perform pressure filtration and dialysis, thus realizing multiple uses of one chamber.

[0074] Specifically, Figure 1As shown, the recovery equipment is an integrated equipment of sedimentation separation and pressure filtration, and its specific structure is: the side wall of the separation chamber 12 is connected to the side wall of the dissolution chamber 13, and the side wall of the dissolution chamber 13 gradually approaches its central axis along the water flow direction, and the stirring blades 25 from sparse to dense are arranged in sequence on the rotating shaft 24 of the filter press 2 along the water flow direction to accelerate the speed of flue gas dissolution to form boron ore solution and increase its dissolution rate, and realize that smaller impurities passing through the liquid inlet 211 are entrained by the water flow and impact the position where the blade 221 and the protrusion 222 of the rolling rib 132 and the rolling sheet 22 abut against each other, thereby improving the crushing rate of the impurities, and the protrusion 222 protrudes vertically from the blade 221, so as to realize more powerful crushing of the impurities.

[0075] Specifically, Figure 1 As shown, the installation cavity 14 is arranged at one side of the separation cavity 12 , and a centrifugal pump 3 is installed inside the installation cavity 14 . The liquid outlet of the pumping chamber of the centrifugal pump 3 is connected to the outside of the horizontal tank body 1 .

[0076] Specifically, Figure 1 As shown, the bottom of the front end and the bottom of the rear end of the horizontal tank body 1 are provided with supporting feet 16, and the variable flux device 42 is installed on a detachable cover body 41. By removing the cover body 41, the interior of the horizontal tank body 1 can be cleaned, maintained and impurities in the collection tank 121 can be removed.

[0077] Specifically, Figure 1 As shown, an adsorption net is provided in the collection tank 121 to better collect the settled large particle impurity accumulation 123.

[0078] Therefore, in this embodiment, by passing the unfiltered flue gas containing boron gangue into the separation chamber 12 and the dissolution chamber 13 of the recovery equipment, the impurities in the flue gas are separated by sedimentation and pressure filtration and dialysis are carried out in turn to obtain a boron gangue solution with high purity, thereby achieving a high acquisition rate of boron gangue in the flue gas, thereby avoiding environmental pollution caused by boron gangue discharge and improving the recovery and utilization efficiency of boron gangue. The rolling sheet 22 of the filter press 2 and the rolling ribs 132 of the horizontal tank body 1 are also used to crush small particles of impurities, thereby avoiding the impurities with large volume and small power to adhere to the dialysis membrane 131, and it is difficult to separate from the dialysis membrane 131 with the water flow, causing the dialysis membrane 131 to be blocked. The filter press 2 is also used to accelerate the rate at which the boron gangue solution is pressed and dialyzed through the dialysis membrane 131. By arranging the driving assembly 4 in the separation chamber 12, the separation chamber 12 can be used for sedimentation separation of flue gas and large particle impurities, and can also be used to generate power to push the filter press 2 to perform pressure filtration and dialysis, thus achieving multiple uses of one chamber.

[0079] Embodiment 2

[0080] like Figure 1 and Figure 2As shown, this embodiment provides a method for recovering boron gangue from boron carbide smelting flue gas on the basis of Embodiment 1. The recovery method adopts the boron gangue recovery equipment for boron carbide smelting flue gas as described in Embodiment 1, and includes the following steps: Step S1, after the flue gas is introduced into the separation chamber 12, the separation chamber 12 and the dissolution chamber 13 maintain a static state for a first set time period, so as to sediment and separate the flue gas and large particles of impurities in the separation chamber 12; Step S2, after the isolation cover 122 covers the collection tank 121, liquid is introduced into the separation chamber 12 to form a boron gangue solution of dissolved flue gas, and the filter press 2 rotates to crush the small particles of impurities in the boron gangue solution that have not been precipitated and separated in the separation chamber 12; Step S3, the filter press 2 moves toward the dialysis membrane 131 to filter and dialyze the boron gangue solution through the dialysis membrane 131.

[0081] Furthermore, in the step S2, the centrifugal pump 3 is turned on at a first centrifugal speed, and the centrifugal pump 3 sucks most of the boron oxide solution into the dissolution chamber 13; in the step S3, the centrifugal pump 3 is turned on at a second centrifugal speed greater than the first centrifugal speed, and the centrifugal pump 3 completely sucks the boron oxide solution through the dialysis membrane 131.

[0082] Furthermore, a connector 31 for controlling whether the centrifugal pump 3 is connected to the filter press 2 is provided on the driving shaft of the centrifugal pump 3; the step S2 comprises: step S21, during the second set time, the connector 31 is not connected to the filter press 2, and the centrifugal pump 3 is kept turned on at the first centrifugal rate to suck most of the boron oxide solution into the dissolution chamber 13; step S22, during the third set time, the connector 31 is connected to the filter press 2, and the centrifugal pump 3 is kept turned on at the first centrifugal rate to crush the small particle impurities.

[0083] Furthermore, a driving component 4 is provided in the separation chamber 12, and the driving component 4 is a magnetic component, including a variable flux device 42 and a magnetic attraction part 43 that contact and separate from each other; in the step S3, the variable flux device 42 cyclically maintains the first magnetism and the second magnetism, the first magnetism repels the magnetic attraction part 43 and pushes the filter press 2 away, and the second magnetism attracts the magnetic attraction part 43 and attracts the filter press 2.

[0084] Specifically, in step S3, the connector 31 is connected to the filter press 2, and the centrifugal pump 3 is kept turned on at a third centrifugal speed greater than the second centrifugal speed, so that the filter press 2 does not rotate during the process of moving and repeated filtration and dialysis, and the centrifugal pump 3 operates at maximum power until all the boron oxide solution is discharged.

[0085] Specifically, during the first set time period of step S1 , the filter press 2 , the connector 31 , the centrifugal pump 3 and the variable magnetic flux device 42 are all not working.

[0086] Preferably, the first set time length is about 10 minutes, and can be increased according to the density of impurities in the flue gas. The second set time length is about 5 minutes, and the third set time length is about 15 minutes.

[0087] Preferably, the first centrifugal speed specifically refers to the rotation speed of the impeller assembly 32 of the centrifugal pump 3 is approximately 1100 revolutions per minute, the second centrifugal speed specifically refers to the rotation speed of the impeller assembly 32 of the centrifugal pump 3 is approximately 1300 revolutions per minute, and the third centrifugal speed specifically refers to the rotation speed of the impeller assembly 32 of the centrifugal pump 3 is approximately 2000 revolutions per minute.

[0088] In some possible embodiments, a water level sensor and a liquid density sensor are provided in the dissolving chamber 13. According to the water level value detected by the water level sensor, the third centrifugal rate is dynamically adjusted to ensure that the boron ore solution is completely discharged with lower energy consumption, thereby further improving the recovery rate of the boron ore solution. According to the impurity density value detected by the liquid density sensor, the first centrifugal rate and the second centrifugal rate are dynamically adjusted, and when there are a lot of impurities, an alarm is issued, and the boron ore solution is sucked out through the flue gas inlet 11 to prevent the filtration process from being unable to proceed.

[0089] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A boron carbide smelting flue gas boron gangue recovery equipment, characterized in that: include: A horizontal tank body (1) is provided with a separation chamber (12) and a dissolution chamber (13) which are interconnected; the separation chamber (12) is provided with a smoke inlet (11) at the top, and a collection tank (121) and an isolation cover (122) at the bottom; after the smoke and large particle impurities are separated by sedimentation in the separation chamber (12), the isolation cover (122) covers the collection tank (121) to isolate the large particle impurities in the collection tank (121); the dissolution chamber (13) is provided with a liquid outlet, and the liquid outlet is provided with a dialysis membrane (131); A centrifugal pump (3) is used to suck the boron ore solution dissolved in the flue gas in the separation chamber (12) into the dissolution chamber (13); A filter press (2) is arranged in the dissolving chamber (13), a rolling sheet (22) is obliquely arranged on the side wall of the filter press (2), and the side wall of the dissolving chamber (13) has at least two spirally arranged rolling ribs (132); When the filter press (2) rotates, different regions of the rolling sheet (22) contact the rolling ribs (132) in sequence along the inclined direction thereof, so as to crush small particle impurities in the boron waste solution that have not been settled and separated in the separation chamber (12); When the filter press (2) moves toward the dialysis membrane (131), the boron ore solution is pressure filtered and dialyzed through the dialysis membrane (131) to separate the boron ore solution from small particle impurities.

2. The boron carbide smelting flue gas boron gangue recovery equipment according to claim 1, characterized in that: The separation chamber (12), the dissolution chamber (13) and the dialysis membrane (131) are all arranged horizontally on a straight line; a mounting chamber (14) of the centrifugal pump (3) is arranged on a side of the dialysis membrane (131) away from the dissolution chamber (13); an opening of a pumping chamber of the centrifugal pump (3) is sealed and connected to the dialysis membrane (131); The smoke inlet (11) is provided with a three-way valve, and the different inlets of the three-way valve are switched to switch the introduction of smoke or water into the separation chamber (12); When the filter press (2) moves toward the dialysis membrane (131) to perform filter press dialysis on the boron ore solution, the three-way valve is closed, the separation chamber (12) and the dissolution chamber (13) form a sealed chamber, and the pumping chamber of the centrifugal pump (3) generates negative pressure to accelerate the filter press dialysis rate of the boron ore solution.

3. The boron gangue recovery equipment for boron carbide smelting flue gas according to claim 2, characterized in that: The pump suction chamber is provided with an impeller assembly (32) for generating negative pressure; A rotating shaft (24) for driving the filter press (2) to rotate is disposed at the center of the filter press (2), and a filter press plate (23) provided with a through hole (231) is disposed on the side of the filter press that contacts the dialysis membrane (131); A connector (31) for controlling whether the impeller assembly (32) is connected to the rotating shaft (24) is disposed on the driving shaft of the impeller assembly (32). When the driving shaft is connected to the rotating shaft (24) and rotates, the filter press (2) is at least pushed by the boron ore solution.

4. The boron gangue recovery equipment for boron carbide smelting flue gas according to claim 3, characterized in that: A liquid inlet plate (21) is arranged on one side of the filter press (2) facing the separation chamber (12), and a liquid inlet (211) with a diameter gradually decreasing along its axial direction is arranged on the liquid inlet plate (21); The liquid inlet (211) is used to accelerate the passing speed of the boron oxide solution to generate thrust on the liquid inlet plate (21).

5. The boron gangue recovery equipment for boron carbide smelting flue gas according to claim 4, characterized in that: A driving assembly (4) is provided in the separation chamber (12), and the driving assembly (4) is connected to the liquid inlet plate (21) and is used to push the filter press (2) to move toward the dialysis membrane (131).

6. The boron gangue recovery equipment for boron carbide smelting flue gas according to claim 5, characterized in that: The driving component (4) is a magnetic component, comprising a variable flux device (42) and a magnetic attraction portion (43) that are in contact with and separated from each other; The variable magnetic flux device (42) is arranged on a side wall of the separation chamber (12) away from the liquid inlet plate (21), and the magnetic attraction portion (43) is fixedly connected to the liquid inlet plate (21).

7. A method for recovering boron gangue from boron carbide smelting flue gas, characterized in that: The recovery method adopts the boron gangue recovery equipment for boron carbide smelting flue gas as claimed in any one of claims 1 to 6, and the recovery method comprises the following steps: Step S1, after the flue gas is introduced into the separation chamber (12), the separation chamber (12) and the dissolution chamber (13) are kept in a static state for a first set time period, so as to perform sedimentation separation of the flue gas and large particle impurities in the separation chamber (12); Step S2, after the isolation cover (122) covers the collection tank (121), liquid is introduced into the separation chamber (12) to form a boron ore solution for dissolving the flue gas, and the filter press (2) is rotated to crush small particles of impurities in the boron ore solution that have not been settled and separated in the separation chamber (12); Step S3, the filter press element (2) moves toward the dialysis membrane (131) to filter and dialyze the boron oxide solution through the dialysis membrane (131).

8. The method for recovering boron gangue from boron carbide smelting flue gas according to claim 7, characterized in that: In the step S2, the centrifugal pump (3) is turned on at a first centrifugal speed, and the centrifugal pump (3) sucks most of the boron oxide solution into the dissolution chamber (13); In step S3, the centrifugal pump (3) is turned on at a second centrifugal speed greater than the first centrifugal speed, and the centrifugal pump (3) completely sucks the boron oxide solution through the dialysis membrane (131).

9. The method for recovering boron gangue from boron carbide smelting flue gas according to claim 8, characterized in that: A plug-in connector (31) is provided on the driving shaft of the centrifugal pump (3) for controlling whether the centrifugal pump (3) is connected to the filter press (2); The step S2 comprises: Step S21, during the second set time, the connector (31) is not connected to the filter press (2), and the centrifugal pump (3) is kept turned on at the first centrifugal speed to suck most of the boron oxide solution into the dissolution chamber (13); Step S22: During the third set time, the connector (31) is connected to the filter press (2), and the centrifugal pump (3) is kept turned on at the first centrifugal speed to crush the small particle impurities.

10. The method for recovering boron gangue from boron carbide smelting flue gas according to any one of claims 7 to 9, characterized in that: A driving component (4) is provided in the separation chamber (12), and the driving component (4) is a magnetic component, comprising a variable magnetic fluxer (42) and a magnetic attraction portion (43) that are in contact with and separated from each other; In step S3, the variable flux device (42) cyclically maintains the first magnetism and the second magnetism, wherein the first magnetism repels the magnetic attraction portion (43) and pushes the filter press (2) away, and the second magnetism attracts the magnetic attraction portion (43) and attracts the filter press (2) toward it.

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