CN217092410U

CN217092410U - Filter for raw salt purification and raw salt purification device

Info

Publication number: CN217092410U
Application number: CN202220706869.8U
Authority: CN
Inventors: 王全祥; 王学习; 王�华
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-08-02
Anticipated expiration: 2032-03-28

Abstract

The utility model provides a raw salt is filter and raw salt purification device for purification, raw salt purification device includes that raw salt purifies uses the filter, raw salt agitating unit, the waste residue funnel, the crystallizing pond, conveyor, the solid-liquid separation machine, wastewater disposal basin and drying device, raw salt agitating unit upper end is equipped with the raw salt import, mud sediment cleaning barrel is connected to raw salt agitating unit's bottom, raw salt agitating unit leans on the position of below to pass through the dabber that the filter was used in the inlet pipe connection raw salt purification, the crystallizing pond is connected to the discharging pipe of filter for raw salt purification, aqueous crystal salt in the crystallizing pond passes through conveyor and carries to the solid-liquid separation machine in, the crystal salt granule that the solid-liquid separation machine centrifugation goes out gets into drying device, obtain the finished product. The utility model discloses can improve degree of mechanization and rate of equipment utilization, improve equipment's operating efficiency, the complementary advantage of system's equipment can be fully exerted, carries out cyclic utilization with waste material and waste heat, and energy-concerving and environment-protective benefit is showing.

Description

Filter for raw salt purification and raw salt purification device

Technical Field

The utility model relates to a food manufacturing technical field especially relates to a filter and former salt purification device are used in former salt purification.

Background

In the prior art, the raw salt is purified and mostly produced according to the following steps: sampling, dissolving, precipitating, filtering, evaporating, cooling, crystallizing, filtering and evaporating. And the raw salt is purified by adopting a solid-liquid separation stacking-emptying technology or a sun-drying recrystallization salt preparation technology. But the equipment and the process are complex, the purification cost is high, the mechanization degree is low, the equipment utilization rate is low, and the complementary advantages of the system equipment cannot be fully exerted.

Disclosure of Invention

An object of the utility model is to provide a former salt is filter and former salt purification device for purification can improve degree of mechanization and rate of equipment utilization.

The embodiment of the application provides a filter for purifying crude salt, which comprises a cylinder, a mandrel, a filtering fin plate and a slurry spiral discharge device, wherein the slurry spiral discharge device is arranged at the central position of the tail end of the cylinder and extends into the cylinder for a certain distance;

the slurry spiral discharge device is cylindrical in shape, the slurry spiral discharge device and the cylinder are respectively connected with a rotary driving mechanism, and the rotary driving mechanism is a motor, a speed reducer and the like;

the inside cavity of dabber, the head end of dabber move sealing connection have the inlet pipe, and the tail end of dabber moves sealing connection has the discharging pipe, and the dabber separates out a feeding chamber through sealed end cap in the one end of connecting the inlet pipe, and the inlet pipe stretches into to the feeding intracavity, and a plurality of through-hole has been seted up to the chamber wall in feeding chamber, and the through-hole is located the barrel, and the outer wall connection of dabber has the hollow filtration finned plate of a plurality of, and the clear liquid after filtering through filtering the finned plate gets into in the dabber.

In some embodiments, the filter fin is a nanoceramic membrane filter fin.

In some embodiments, the filter fin plates are uniformly distributed on the mandrel and are connected with the mandrel in a sealing mode.

In some embodiments, the outlet end of the filter fin is inserted into the mandrel interior.

In some embodiments, 2 to 3 inclined material guide plates are fixedly arranged on the inner wall of the barrel, one end of each inclined material guide plate, which is close to the discharge pipe, is higher than one end of each inclined material guide plate, which is close to the feed pipe, and the inclined material guide plates are inclined by 15 to 30 degrees in the horizontal direction.

In some embodiments, a circle of a plurality of slurry discharging hoppers are fixedly arranged on the inner wall of one end of the barrel, the slurry discharging hoppers are arranged around the periphery of a circle of blanking ports of the slurry spiral discharging device, each slurry discharging hopper faces one blanking port, and the slurry discharging hoppers rotating to the upper side pour guided slurry into the blanking ports.

In some embodiments, a support device is arranged below the head end of the mandrel and below the slurry spiral discharge device.

In some embodiments, the supporting device comprises a supporting column and a supporting roller, the supporting roller is mounted on the supporting column, and the lower end of the mandrel and the lower end of the slurry spiral discharge device are supported by the supporting roller.

In another aspect, the embodiment of the present application provides a raw salt purification apparatus, which comprises the above filter for raw salt purification, and further comprises a raw salt stirring device, a waste residue funnel, a crystallization tank, a conveying device, a solid-liquid separator, a wastewater tank and a drying device, the upper end of the raw salt stirring device is provided with a raw salt inlet, the bottom end of the raw salt stirring device is connected with a sludge cleaning barrel, the position, close to the lower part, of the raw salt stirring device is connected with a mandrel of a filter for purifying raw salt through a feeding pipe, a waste residue funnel is connected with the bottom end of a discharging funnel of the filter for purifying raw salt, a discharging pipe of the filter for purifying raw salt is connected with a crystallizing pond, water-containing crystal salt in the crystallizing pond is conveyed into a solid-liquid separator through a conveying device, the waste water tank and the drying device are both connected to the solid-liquid separator, crystal salt particles centrifuged by the solid-liquid separator enter the drying device, and waste water discharged by the solid-liquid separator enters the waste water tank.

In some embodiments, the waste water tank is connected to the raw salt stirring device and/or the feed pipe through a circulation pipeline.

The utility model has the advantages that: the novel filter for purifying the crude salt is provided, the crude salt is filtered more quickly, the filter is applied to a crude salt purifying device, the degree of mechanization and the equipment utilization rate can be improved, the operation efficiency of equipment is improved, the complementary advantages of system equipment can be fully exerted, waste materials and waste heat are recycled, and the energy-saving and environment-friendly benefits are remarkable.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent from and readily appreciated by reference to the following description of the embodiments taken in conjunction with the accompanying drawings,

wherein:

FIG. 1 is a schematic diagram of a filter for purifying crude salt in an embodiment of the present application;

FIG. 2 is a schematic view of the connection relationship of the slurry discharge hopper, the slurry spiral discharge device and the supporting roller in the right view direction;

FIG. 3 is a schematic diagram of the internal structure of the slurry spiral discharge device;

FIG. 4 is a schematic view showing the position of the inclined guide plate in the barrel;

FIG. 5 is a schematic structural diagram of a raw salt purification apparatus in an embodiment of the present application;

reference numerals:

1-a feed pipe; 2-a feed chamber; 3-a through hole; 4-a cylinder body; 5-mandrel; 6-inclined material guide plates; 7-a filter fin plate; 8-a slurry spiral discharge device; 9-blanking port; 10-a slurry discharge hopper; 11-a sprocket; 12-a discharge funnel; 13-a discharge pipe; 14-supporting rollers; 15-a chain; 16-a reducer; 17-a support column; 18-sealing the plug; 19-front plug; 20-raw salt inlet; 21-crude salt stirring device; 22-a sludge cleaning barrel; 23-a circulation line; 24-a waste residue funnel; 25-a water pump; 26-a crystallization tank; 27-a conveying device; 28-solid-liquid separator; 29-a wastewater tank; 30-a drying device; 31-high quality salt; 32-a liquid pump; 33-a tap water pipe; 34-rear plug; 35-helical blades; 36-a rotating shaft; 37-rotating cage; 38-a rotary joint; a-crude salt purification filter.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The following describes a production apparatus and a production method of biomass active salt according to an embodiment of the present invention with reference to the drawings.

As shown in fig. 1-4, an embodiment of the application provides a filter for purifying raw salt, which includes a cylinder 4, a mandrel 5, a filtering fin 7, and a slurry spiral discharge device 8, where the slurry spiral discharge device 8 is installed at a central position of a tail end of the cylinder 4 and extends into the cylinder 4 for a certain distance, the slurry spiral discharge device 8 is connected with the cylinder 4 in a dynamic sealing manner, and the slurry spiral discharge device 8 and the cylinder 4 are driven by a motor and a reducer respectively, and do not interfere with each other. The speed reducer 16 can be driven by a high-power motor, and the position of the speed reducer is not limited to the position in the attached drawings and can be set according to actual needs. In the attached drawings, the speed reducer of the barrel 4 is not shown, so that there are many ways for the slurry spiral discharging device 8 and the barrel 4 to rotate, and the method is not limited to the mode of adopting the speed reducer for transmission, and is not the key point of the present invention.

Barrel 4 is the columnar structure, and barrel 4 is integrated into one piece structure, also can be barrel 4 front and back both ends sealing weld have the end cap, in order to support barrel 4, can be provided with the bearing structure who takes the arc concave surface at barrel 4 lower extreme and be used for sliding support barrel 4, and barrel 4 can rotate the support on the arc concave surface.

The spiral slurry discharging device 8 is provided with a circle of blanking ports 9 at the part extending into the cylinder 4, and the spiral slurry discharging device 8 is connected with a discharging hopper 12 at the part outside the cylinder 4 in a movable sealing manner and is used for collecting slurry discharged by the spiral slurry discharging device 8. While the slurry spiral discharging device 8 rotates, the discharging hopper 12 keeps not rotating, and the two do not interfere with each other. The mud spiral discharging device 8 is cylindrical, a chain wheel 11 is arranged on the mud spiral discharging device 8, and the speed reducer 16 drives the mud spiral discharging device 8 to rotate through a chain 15 and the chain wheel 11. The mode of rotating the slurry spiral discharging device 8 is not limited to the mode of adopting a speed reducer for transmission.

The mandrel 5 is inserted into the central axis position in the cylinder 4 and penetrates through the corresponding positions of the two ends of the cylinder 4, and the head end of the mandrel 5 extends out of the cylinder 4 for a certain distance for supporting. And supporting devices are arranged below the head end of the mandrel 5 and below the slurry spiral discharge device 8. The supporting device comprises a supporting column 17 and a supporting roller 14, the supporting roller 14 is installed on the supporting column 17, and the lower end of the mandrel 5 and the lower end of the slurry spiral discharging device 8 are supported by the supporting roller 14. Specifically, the supporting roller 14 is connected to the upper end of the supporting column 17 in a shaft mode, the supporting roller 14 can rotate, the mandrel 5 rotates and the slurry spiral discharging device 8 rotates, and meanwhile the supporting roller 14 is driven, so that rotation supporting is achieved. The mandrel 5 is connected with the barrel 4 in a dynamic sealing mode, a transmission gear can be arranged at the right end of the mandrel 5, transmission is achieved through a speed reducer, and rotation between the mandrel 5 and the barrel 4 is not interfered with each other. The afterbody of dabber 5 runs through mud spiral discharge device 8 and discharge hopper 12 to stretch out discharge hopper 12 right side one end distance, 5 movable seal of dabber connect in mud spiral discharge device 8 and discharge hopper 12, and dabber 5 rotates separately with mud spiral discharge device 8, and can not drive discharge hopper 12 when dabber 5 pivoted and rotate, and the three mutual noninterference.

The head end of dabber 5 passes through preceding end cap 19 and connects inlet pipe 1, for guaranteeing the leakproofness, welding sealing connection between dabber 5 and preceding end cap 19. The front plug 19 is rotatably connected with the feeding pipe 1 through a bearing, the bearing adopts a sealing bearing, and the feeding pipe 1 keeps not rotating when the mandrel 5 rotates. The outer diameter of the feed tube 1 is smaller than the inner diameter of the mandrel 5. The connection mode of the mandrel 5 and the feeding pipe 1 can adopt other dynamic sealing connection modes.

The tail end of the mandrel 5 is communicated with a discharge pipe 13, and the inner diameter of the discharge pipe 13 is not smaller than that of the mandrel 5, so that clear liquid in the mandrel 5 can flow into the discharge pipe 13. The discharge pipe 13 and the mandrel 5 are connected through a rear plug 34, and the mandrel 5 and the rear plug 34 are connected in a welding and sealing mode to ensure the sealing performance. The discharge pipe 13 is rotatably connected in the rear plug 34 through a bearing, the bearing adopts a sealed bearing, and the discharge pipe 13 keeps not rotating when the mandrel 5 rotates. The mandrel 5 and the discharge pipe 13 can be connected in other dynamic sealing modes.

The inside cavity of dabber 5, inside inlet pipe 1 runs through and stretches into dabber 5 behind the preceding end cap 19, dabber 5 separates a feeding chamber 2 that length is 30 ~ 50cm through sealed end cap 18 in the one end of connecting inlet pipe 1, and inlet pipe 1 stretches into to feeding chamber 2 in, and a plurality of through-hole 3 has been seted up to the chamber wall in feeding chamber 2. The inner wall of the feed chamber 2 may be provided with a screw conveyor bar with helical blades inclined at 45 ° to push the contaminated saline solution into the open hole in the feed chamber 2. The sealing plug 18 and the through hole 3 are both positioned in the cylinder 4 in spatial position, and the salt solution containing impurities falls into the cylinder 4 from the through hole 3 in the feeding cavity 2.

The outer wall of the mandrel 5 is connected with a plurality of hollow filtering fin plates 7, the thickness of the filtering fin plates 7 is 7-10mm, the width of the filtering fin plates is 150-200mm, a plurality of small holes are uniformly distributed in the middle of the filtering fin plates, one end of each filtering fin plate 7 is an outlet end, the other end of each filtering fin plate is closed, and the filtering fin plates 7 are existing products and can be obtained through the market. The filtering fin plates 7 are all positioned in the cylinder body 4, and when the cylinder body 4 rotates, the filtering fin plates 7 also serve as stirring fins to filter while stirring. The clear liquid (i.e. pure salt liquid) filtered by the filter fin 7 enters the inside of the mandrel 5. The filtering finned plate 7 is a nano ceramic membrane filtering finned plate. The filtering fin plates 7 are uniformly distributed on the mandrel 5 and are connected to the mandrel 5 in a sealing way. A plurality of jacks are uniformly distributed on the mandrel 5, the outlet end of the filtering fin plate 7 is inserted into the mandrel 5 through the jacks, the insertion distance is about 10mm, and the filtering fin plate is sealed and bonded at the jacks by SPP structural adhesive, resin adhesive or special adhesive. The clear saline water after the salt solution containing impurities is filtered by the filtering fin plate 7 enters the mandrel 5.

The inner wall of one end (namely the right end shown in figure 1) provided with the slurry spiral discharging device 8 of the cylinder 4 is fixedly provided with a plurality of slurry discharging hoppers 10 in a circle, the slurry discharging hoppers 10 are arranged around the periphery of a circle of blanking ports 9 of the slurry spiral discharging device 8, each slurry discharging hopper 10 is right opposite to one blanking port 9, and the slurry discharged from the uppermost slurry discharging hopper 10 is poured into the blanking ports 9.

In some embodiments, the spiral discharge device 8 is provided with a plurality of inclined guide plates inside for guiding the slurry entering from the discharge opening 9 to the discharge hopper 12, and the guide plates are arranged to avoid the transversely penetrating mandrel 5. The mud spiral discharging device 8 can also be a structure of a mud spiral conveyer, a rotating shaft 36 is arranged in the middle, a spiral blade 35 is arranged outside the rotating shaft 36, and the mandrel 5 penetrates through the rotating shaft 36. The spindle 5 and the rotating shaft 36 can be connected by a bearing, and the rotation between the spindle 5 and the rotating shaft 36 is not affected by each other, as shown in fig. 3. It is also possible to use a rotating cage 37 construction, whereby the cage 37 is mounted on the shaft 36 and the slurry is led through the cage 37 to the discharge hopper 12, as shown in fig. 2.

3 inclined material guide plates 6 are fixedly arranged on the inner wall of the cylinder body 4, one inclined material guide plate is arranged at every 120 degrees, 2 inclined material guide plates 6 can be arranged, the inclined material guide plates are symmetrically arranged in the cylinder body 4, and the corresponding number can be set according to requirements. The length of the inclined material guiding plate 6 is substantially equal to the length of the mandrel 5 in the barrel 4, one end of the inclined material guiding plate 6 close to the discharge pipe 13 is higher than one end close to the feed pipe 1 (i.e. the right end is higher than the left end), and the inclined material guiding plate is inclined by 15-30 ° in the horizontal direction in the barrel 4, as shown in fig. 4, the height of the inclined material guiding plate 6 from one end of the feed pipe 1 to one end of the discharge pipe 13 increases from 30-200 mm. The left end of the inclined guide plate 6 is abutted to the left end face of the inner cavity of the cylinder body 4, the right end of the inclined guide plate 6 is located at the position, close to the right end face, of the inner cavity of the cylinder body 4, the slurry discharge hopper 10 is located between the inclined guide plate 6 and the right end face of the cylinder body 4, and the length of the inclined guide plate 6 plus the length of the slurry discharge hopper 10 are approximately equal to the length of the inner cavity of the cylinder body 4. The inclined material guide plate 6 is arranged to guide slurry from left to right and prevent the barrel from losing balance due to accumulation at a certain position. When the cylinder body 4 rotates, slurry can flow from left to right along the inclined guide plate 6, and flows to the slurry discharge hopper 10 at the rightmost end, and then the slurry discharge hopper 10 is driven to rotate from the bottommost part to the topmost part due to the rotation of the cylinder body 4, and is poured into the discharge port 9 of the slurry spiral discharge device 8 after being turned.

The dynamic seal connection involved in the scheme can be realized by adopting a seal bearing and can also be realized by adopting other existing modes. The motor and the speed reducer related to the scheme can realize forward and reverse rotation.

In another embodiment of the present application, as shown in fig. 5, a raw salt purification apparatus is provided, which includes the above-mentioned filter a for raw salt purification, a raw salt stirring device 21, a rotary joint 38, a waste residue funnel 24, a crystallization tank 26, a conveying device 27, a solid-liquid separator 28, a waste water tank 29 and a drying device 30, wherein the upper end of the raw salt stirring device 21 is provided with a raw salt inlet 20, the bottom end of the raw salt stirring device 21 is connected to a sludge cleaning barrel 22, the lower position of the raw salt stirring device 21 is connected to a mandrel 5 of the filter a for raw salt purification through a feeding pipe 1, the waste residue funnel 24 is connected to the bottom end of a discharging funnel 12 of the filter a for raw salt purification, a discharging pipe 13 of the filter a for raw salt purification is connected to the crystallization tank 26, the hydrous crystal salt in the crystallization tank 26 is conveyed to the solid-liquid separator 28 through the conveying device 27, the waste water tank 29 and the drying device 30 are both connected to the solid-liquid separator 28, the crystallized salt particles centrifuged by the solid-liquid separator 28 enter a drying device 30, and the wastewater discharged by the solid-liquid separator 28 enters a wastewater tank 29. The waste water tank 29 is connected with the raw salt stirring device 21 and the feeding pipe 1 through a circulating pipeline 23, and is controlled by a control valve on the circulating pipeline 23 respectively.

The specific implementation process is as follows: the coarse raw salt comprises sea salt, lake salt, well salt, rock salt and other particles larger than 10mm, the particles are crushed into raw salt smaller than 10mm by crushing equipment, the raw salt quantitatively enters the raw salt stirring device 21 through the raw salt inlet 20, meanwhile, a control valve of a tap water pipe 33 is opened to lead tap water (or magnetized micromolecular water) to enter the raw salt stirring device 21, and water is added usually according to the mass ratio of 2-4: 1, namely one part of raw salt is added with 2-4 parts of water. The raw salt contains certain earth and impurities, the raw salt stirring device 21 can deposit slurry to the bottom of the raw salt stirring device 21 after stirring, a control valve at the bottom of the raw salt stirring device 21 is opened after the slurry is accumulated to a certain degree, and the slurry is discharged to a sludge cleaning barrel 22 for later use. The salt solution containing impurities is fed through the feed pipe 1 to the filter a for raw salt purification. The left end of the mandrel 5, which is positioned on the outer side of the front plug 19, is connected with a rotary joint 38, and the feeding pipe 1 conveys the salt solution containing impurities into the feeding cavity 2 of the mandrel 5 through the rotary joint 38.

In some embodiments, the rotary joint 38 may be a two-channel rotary joint, in which one channel is filled with saline solution containing impurities and the other channel is filled with tap water (or magnetized small molecule water).

The core shaft 5 of the filter A for purifying the crude salt is not only a clear liquid outflow cylinder after filtration, but also serves as a rotating shaft of the cylinder body 4. The saline solution containing impurities enters the feeding cavity 2 through the feeding pipe 1 and falls into the barrel 4 from the through hole 3, and the volume of the liquid in the barrel 4 is about half of the volume of the barrel 4. The clear liquid filtered by the nano ceramic membrane filtering fin plate enters the mandrel 5. One end of the slurry discharging hopper 10 is opened for charging slurry, and the side surface of the slurry discharging hopper is a semicircular baffle plate with the radius of 300mm to form a semi-closed structure. When the sediment in the barrel 4 reaches a certain amount, the equipment stops clockwise rotation and starts a reverse rotation button, at the moment, the mud is continuously taken to the top of the barrel 4 by the plurality of mud discharge hoppers 10, the mud is poured into the mud spiral discharge device 8 after continuously rotating, and the mud enters the waste residue hopper 24 through the discharge hopper 12 and is discharged for standby.

The clear liquid flows into the discharging pipe 13, the discharging pipe control valve and the water pump 25 are opened, the pure salt liquid is conveyed into each crystallization tank 26, a plurality of crystallization tanks 26 can be arranged, the structure of the closed greenhouse can be designed, the size of the crystallization tank 26 is designed to be 20-30 m long, 8-10 m wide and 2-3 m high, the bottom of the tank is paved by 1500 x 750mm high-end ceramic tiles, the bottom of the ceramic tiles is sealed and bonded by adopting a waterproof material, usually, salt can be crystallized to generate 1-2mm crystal particles within 1 week of thermal insulation of the greenhouse in spring, summer and autumn in the tank, and then, manually or mechanically scraping the crystallized salt from the inlet end to the outlet by using a salt collecting scraper, and enabling the collected crystallized salt to enter a conveying device 27 through the slope of the outlet, wherein the crystallized salt contains certain moisture, the conveying device 27 can be a belt conveyor, and the crystallized salt is conveyed into a solid-liquid separator 28 through the conveying device 27 to be subjected to high-speed centrifugation. After centrifugation, the solid crystallized salt particles are discharged from the solids outlet and passed to the drying apparatus 30 for drying. The drying device 30 can be a hot air drying device or a microwave drying device, and the dried high-quality salt 31 can be directly sold as commodity salt or used as raw material salt of active salt. The centrifuged liquid is discharged into a waste water tank 29 through a liquid outlet, and then the liquid is conveyed into the raw salt stirring device 21 or the feeding pipe 1 through a circulating pipeline 23 by a liquid pump 32 for recycling. The hot steam generated by drying in the drying device 30 is supplied to the crude salt stirring device 21 and the crude salt purification filter A through the jet pump, so that the waste heat is fully recycled, the operation efficiency of the equipment is improved, and the energy-saving and environment-friendly benefits are remarkable.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A filter for purifying raw salt is characterized by comprising a cylinder, a mandrel, a filtering fin plate and a slurry spiral discharge device, wherein the slurry spiral discharge device is arranged at the central position of the tail end of the cylinder and extends into the cylinder for a certain distance;

the slurry spiral discharge device is cylindrical in shape, and the slurry spiral discharge device and the cylinder are respectively connected with a rotary driving mechanism;

2. The filter for purifying crude salt according to claim 1, wherein the filter fin is a nanoceramic membrane filter fin.

3. The filter of claim 1, wherein the filter fins are uniformly distributed on the mandrel and are hermetically connected to the mandrel.

4. The filter for purifying crude salt of claim 1, wherein the outlet end of the filter fin is inserted into the mandrel.

5. The filter for purifying crude salt as claimed in claim 1, wherein 2-3 inclined material guiding plates are fixedly arranged on the inner wall of the cylinder, one end of each inclined material guiding plate close to the discharging pipe is higher than one end close to the feeding pipe, and the inclined material guiding plates are inclined by 15-30 ° in the horizontal direction.

6. The filter for purifying crude salt according to claim 1, wherein a circle of a plurality of slurry discharge hoppers are fixedly arranged on the inner wall of one end of the cylinder body, the inner wall of the end provided with the slurry spiral discharge device is provided with the slurry discharge hoppers, the slurry discharge hoppers are arranged around the periphery of a circle of blanking ports of the slurry spiral discharge device, each slurry discharge hopper faces one blanking port, and the slurry discharge hoppers which are rotated to the upper part pour the guided slurry into the blanking ports.

7. The filter for purifying crude salt as claimed in claim 1, wherein a support device is provided below the head end of the mandrel and below the slurry spiral discharge device.

8. The filter for purifying crude salt according to claim 7, wherein the supporting device comprises a supporting column and a supporting roller, the supporting roller is mounted on the supporting column, and the lower end of the mandrel and the lower end of the slurry spiral discharging device are supported by the supporting roller.

9. A raw salt purification device, comprising the raw salt purification filter of any one of claims 1 to 8, further comprising a raw salt stirring device, a waste residue funnel, a crystallization tank, a conveying device, a solid-liquid separator, a waste water tank and a drying device, wherein the upper end of the raw salt stirring device is provided with a raw salt inlet, the bottom end of the raw salt stirring device is connected with a sludge cleaning barrel, the position below the raw salt stirring device is connected with a mandrel of the raw salt purification filter through a feeding pipe, the waste residue funnel is connected with the bottom end of a discharging funnel of the raw salt purification filter, a discharging pipe of the raw salt purification filter is connected with the crystallization tank, water-containing crystallized salt in the crystallization tank is conveyed to the solid-liquid separator through the conveying device for solid-liquid separation, the waste water tank and the drying device are both connected to the solid-liquid separator, crystallized salt particles centrifuged by the solid-liquid separator enter the drying device, and the wastewater discharged by the solid-liquid separator enters a wastewater tank.

10. The crude salt purification apparatus according to claim 9, wherein the waste water tank is connected to the crude salt stirring device and/or the feed pipe through a circulation line.