Solid-liquid separation device for mirabilite production
By designing a solid-liquid separation device for Glauber's salt production, the problem of the need for two sets of equipment in the existing process is solved, and these processes are completed in one device, reducing costs and simplifying operations .
Patent Information
- Application Number
- CN202420044980.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-09
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-01-09
AI Technical Summary
The existing Glauber's salt production process requires two independent sets of equipment in the initial filtration and chemical impurity removal process, which increases production cost and operational complexity.
A solid-liquid separation device for production of Glauber's salt is designed, which includes a mixing pool, a driving wheel, a screening unit and an impurity collection unit. The screening unit is driven by the driving wheel to perform initial filtration and chemical decomposition removal of nitrate water.
The initial filtration and chemical removal of nitr water are realized in one equipment, reducing production costs and simplifying the operation process.
Smart Images
Figure CN222427342U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of production and processing of inorganic chemicals, and in particular to a solid-liquid separation device for the production of mirabilite. Background Art
[0002] Sodium sulfate decahydrate is Glauber's salt (Na2SO4·10H2O), white fine crystals or powder, easily soluble in water, hygroscopic, odorless, non-toxic. Sodium sulfate can form heptahydrate and decahydrate, and the heptahydrate (Na2SO4·7H2O) is a white rhombic crystal. It turns into anhydrous when heated to 24.4℃. Sodium sulfate is reduced to sodium sulfide when reacting with carbon at high temperature. It is widely used in the manufacture of sodium sulfide, sodium silicate, etc., and is also used in papermaking, glass, printing and dyeing, synthetic fibers, leather making, food, medicine, chemical industry and other industries. In addition, it is also used as an admixture for non-ferrous metal beneficiation, enamel, rubber, fertilizer, lightweight materials, and is also an additive for cement and concrete, as well as a catalyst for the synthesis and preparation of organic chemical products.
[0003] In the existing saltpeter production process, hot water is often added to the Glauber's salt ore to dissolve the Glauber's salt in the ore to form nitrate water containing various impurities. The nitrate water is first filtered to remove large solid impurities in the nitrate water, and then various chemical reagents are added to the nitrate water to remove impurities chemically. The impurities such as calcium and magnesium ions in the nitrate water are precipitated by chemical reactions. The refined and purified raw nitrate water is then frozen and crystallized, and then pumped into a static separation tank for static separation to separate the clear liquid. Finally, the desired product can be obtained through centrifugal dehydration.
[0004] However, the existing nitrate production process requires two independent sets of equipment for the initial filtration of the nitrate water and the chemical removal of impurities from the nitrate water. That is, a set of special equipment is first used to remove large particles of solid impurities in the nitrate water, and then another set of equipment is used to add chemical reagents to the nitrate water after the initial filtration for chemical removal of impurities. This increases the production cost of the manufacturer. Utility Model Content
[0005] The present application provides a solid-liquid separation device for the production of Glauber's salt, which can not only perform preliminary filtration on nitrate water but also perform chemical impurity removal on the nitrate water, thereby effectively reducing the production cost of the production enterprise.
[0006] The above-mentioned purpose of the present application is achieved through the following technical solutions:
[0007] A solid-liquid separation device for producing sodium sulfate, comprising a mixing tank, wherein a driving wheel is arranged inside the mixing tank, a driving shaft is provided through the center of the driving wheel and the two are fixedly connected, a bearing support is fixedly installed on each of the opposite side walls in the width direction of the mixing tank, the two ends of the driving shaft are respectively inserted in the two bearing supports, and the two ends of the driving shaft are rotatably connected to the two bearing supports, one end of the driving shaft is connected to a driving motor through a motor belt, and the driving motor is installed on the outer shell of the mixing tank;
[0008] A plurality of screening units are evenly arranged on the circumference of the driving wheel, and the screening units can salvage solid impurities in the nitrate water in the mixing tank when the driving wheel rotates;
[0009] An impurity collecting unit is provided on one side of the mixing tank in the length direction, and the impurity collecting unit can collect solid impurities in the screening unit; a transfer unit is provided on the other opposite side of the mixing tank in the length direction, and the transfer unit can temporarily store the liquid in the mixing tank.
[0010] Furthermore, the screening unit includes a metal screening mesh, which is fixedly mounted on the frame of the driving wheel. The outer side of the metal screening mesh is fixedly connected to an impurity storage groove, one end of the impurity storage groove is open, and when the impurity storage groove moves from top to bottom toward the impurity collecting unit as the driving wheel moves, the open end of the impurity storage groove faces the impurity collecting unit.
[0011] Furthermore, the impurity collection unit includes a slag discharge pipe, which is fixedly installed on a side wall of the mixing tank in the length direction, and the lower port of the slag discharge pipe passes through the side wall at the corresponding position of the mixing tank, and an impurity collection tank is placed below the lower port of the slag discharge pipe.
[0012] Furthermore, the driving wheel is a regular polygon, and a screening unit is installed on each side of the driving wheel, and the length of the metal screening mesh is equal to the side length of the driving wheel; in two adjacent screening units, the side wall of the impurity storage groove in one of the screening units connected to the driving wheel and the metal screening mesh in the other screening unit are coplanar.
[0013] Furthermore, the transfer unit includes an overflow trough, which is installed in the upper end of the mixing tank away from the slag discharge pipe. A filter screen is installed on the side of the overflow trough close to the driving wheel. A discharge pipe is provided on the bottom plate of the overflow trough. The upper end of the discharge pipe is fixedly connected to the bottom plate of the overflow trough, and the lower end of the discharge pipe passes through the adjacent side wall of the mixing tank and is fixedly connected. A transfer water tank is provided below the discharge pipe.
[0014] Furthermore, a partition plate is provided on the side of the slag discharge pipe away from the driving wheel, and the partition plate divides the space on the side of the slag discharge pipe in the mixing tank away from the driving wheel into two parts. A cover plate is provided above the partition plate, and two feeding ports are provided on the cover plate, and the two feeding ports are symmetrical about the partition plate.
[0015] Furthermore, a baffle extending upward is installed on the side of the upper end of the slag discharge pipe away from the driving wheel.
[0016] In summary, the present application includes at least one of the following beneficial technical effects:
[0017] When the nitrate water needs to be initially filtered, the nitrate water can be added to the mixing tank, and the driving wheel can be used to bring the screening units around it to salvage the large particles of impurities in the nitrate water, and then uniformly discharged to the impurity collection unit. The transfer unit can temporarily store the nitrate water after the initial filtration. After the workers check the solid-liquid separation device of the present application and find no abnormalities, the nitrate water in the transfer unit can be added to the mixing tank, and when adding, the chemical reagent for removing impurities such as calcium and magnesium ions in the nitrate water is also added to the mixing tank, and then the driving wheel is started. The driving wheel can not only stir the nitrate water and the chemical reagent with multiple screening units during the rotation process to make them mix more evenly and react more fully, but also salvage the solid precipitate produced after the reaction, so as to chemically remove impurities from the nitrate water. Since the present application can realize the initial filtration and chemical impurity removal of mirabilite through one device, the production cost is effectively reduced compared with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 It is a schematic diagram of the overall structure of this application;
[0020] Figure 2 It is a schematic diagram of the structure of the driving wheel of the present application;
[0021] Figure 3 It is a cross-sectional view of the overall structure of the present application;
[0022] Figure 4 It is a schematic diagram of the structure after the cover plate of the present application is removed from above the mixing tank.
[0023] Figure numerals: 1. mixing tank; 2. driving wheel; 3. driving shaft; 4. bearing support; 5. driving motor; 6. screening unit; 61. metal screening net; 62. impurity storage tank; 7. impurity collecting unit; 71. slag discharge pipe; 72. impurity collecting tank; 8. transfer unit; 81. overflow tank; 82. filter net; 83. discharge pipe; 84. transfer water tank; 9. partition plate; 10. cover plate; 11. feeding port; 12. baffle. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.
[0025] like Figure 1-Figure 4 As shown, a solid-liquid separation device for producing Glauber's salt disclosed in the present application comprises a mixing tank 1, a driving wheel 2 is arranged inside the mixing tank 1, a driving shaft 3 is penetrated through the center of the driving wheel 2 and the two are fixedly connected, a bearing support 4 is fixedly installed on one opposite side wall in the width direction of the mixing tank 1, two ends of the driving shaft 3 are respectively inserted in the two bearing supports 4, and the two ends of the driving shaft 3 are rotatably connected to the two bearing supports 4, one end of the driving shaft 3 is connected to the driving motor 5 through a motor belt, and the driving motor 5 is installed on the outer shell of the mixing tank 1; a plurality of screening units 6 are evenly arranged on the circumference of the driving wheel 2, and the screening units 6 can salvage solid impurities in the nitrate water in the mixing tank 1 when the driving wheel 2 rotates; an impurity collecting unit 7 is arranged on one side in the length direction of the mixing tank 1, and the impurity collecting unit 7 can collect solid impurities in the screening unit 6; a transfer unit 8 is arranged on the other opposite side in the length direction of the mixing tank 1, and the transfer unit 8 can temporarily store the liquid in the mixing tank 1.
[0026] In the above embodiments, since the initial nitrate water is obtained from the mirabilite mine, it contains multiple impurities inside, and these impurities have large-particle solid impurities (also known as mechanical impurities), and also have multiple metal ion impurities such as calcium and magnesium. Large-particle solid impurities only need to utilize filter screen to filter when removing, and metal ions are soluble in water and need to add corresponding chemical reagents when removing, and then stir, and also need to stand still after stirring, wait for the solid precipitate or insoluble matter produced after the chemical reaction to be screened out after sufficient reaction. Compared with the step of initial filtration, chemical impurity removal needs to mix chemical reagents and the nitrate water after initial filtration, so the initial filtration and chemical impurity removal in the prior art usually adopt two independent devices with different structural functions. And not only increase the production cost of the production enterprise like this, but also workers need to learn the use and maintenance methods of two kinds of equipment, increase the learning and operation difficulty of workers.
[0027] When the nitrate water needs to be initially filtered, the nitrate water can be added to the mixing tank 1 of the present application. Since the driving shaft 3 of the driving wheel 2 is connected to the driving motor 5 through a motor belt (i.e., the driving motor 5 and the driving shaft 3 are belt-driven, and the transmission method is the prior art and will not be described in detail here), the driving wheel 2 can be driven to rotate after the driving motor 5 is started, and the large particles of impurities in the nitrate water can be salvaged by the driving wheel 2 with the screening unit 6 on its peripheral side, and then uniformly discharged into the impurity collection unit 7. The transfer unit 8 can temporarily store the nitrate water after the initial filtration. After the worker checks the solid-liquid separation device of the present application and finds no abnormality, the nitrate water in the transfer unit 8 can be added to the mixing tank 1 again, and a chemical reagent for removing impurities such as calcium and magnesium ions in the nitrate water is also added to the mixing tank 1 when adding, and then the driving wheel 2 is started. The driving wheel 2 can not only stir the nitrate water and the chemical reagent with multiple screening units 6 during the rotation process, so that they are mixed more evenly and react more fully, but also the solid precipitate produced after the reaction can be salvaged, thereby chemically removing impurities from the nitrate water. Since the present application can realize the initial filtration and chemical impurity removal of mirabilite through one device, the production cost is effectively reduced compared with the prior art, and it is simpler and more convenient for workers to operate, maintain and learn.
[0028] Furthermore, if Figure 1 As shown, the screening unit 6 includes a metal screening mesh 61, which is fixedly mounted on the frame of the driving wheel 2. The outer side of the metal screening mesh 61 is fixedly connected to an impurity storage groove 62. One end of the impurity storage groove 62 is open, and when the impurity storage groove 62 moves from top to bottom toward the impurity collecting unit 7 along with the driving wheel 2, the open end of the impurity storage groove 62 faces the impurity collecting unit 7.
[0029] In the above embodiments, Figure 2As shown, the driving wheel 2 of the present application is a frame structure, and the edge of the peripheral side thereof is evenly provided with a plurality of penetrating mounting holes, and the metal screening net 61 is just covering the mounting holes on the peripheral side of the driving wheel 2, and the surrounding of the metal screening net 61 is fixedly connected to the frame of the edge of the driving wheel 2 by bolts and nuts, thus ensuring that the metal screening net 61 is sufficiently firm when in use. In addition, the aperture of the metal screening net 61 of the present application is not larger than the particle size of the smallest solid precipitate after chemical impurity removal, so that the metal screening net 61 can not only prevent large particles of solid impurities from passing through (the particle size of large particles of solid impurities is generally larger than the particle size of the solid precipitate after chemical impurity removal), but also prevent the solid precipitate after chemical impurity removal from passing through.
[0030] The structure of the impurity storage slot 62 connected to the metal screening net 61 is similar to a dustpan, and the opening direction of all the impurity storage slots 62 is the same. Taking the screening unit 6 at the top of the driving wheel 2 as an example, if the impurity collecting unit 7 of the present application is on the left, the opening of the impurity storage slot 62 in the top screening unit 6 will be to the left, and when it rotates toward the impurity collecting unit 7, the opening of the impurity storage slot 62 in the screening unit 6 will gradually approach the impurity collecting unit 7. This makes it convenient for the impurity storage slot 62 to pour the impurities screened by the metal screening net 61 into the impurity collecting unit 7.
[0031] No matter what is initially filled with nitrate water containing more impurities or nitrate water after initial filtration in the mixing pool 1, the separation principle of the impurities by the screening unit 6 is roughly the same. Generally, when the screening unit 6 rotates with the driving wheel 2 and contacts with the nitrate water, the nitrate water will enter the space between the impurity storage tank 62 and the metal screening mesh 61 from the opening of the impurity storage tank 62. The metal screening mesh 61 can intercept the solid impurities in the nitrate water. Then, when the screening unit 6 turns from the top of the driving wheel 2 to the impurity collecting unit 7, the impurities between the metal screening mesh 61 and the impurity storage tank 62 will flow into the impurity collecting unit 7 under the action of gravity, thereby completing the cleaning effect of the impurities in the nitrate water.
[0032] Furthermore, if Figure 3 and Figure 4 As shown, the impurity collection unit 7 includes a slag discharge pipe 71, which is fixedly installed on a side wall of the mixing tank 1 in the length direction, and the lower end of the slag discharge pipe 71 passes through the side wall at the corresponding position of the mixing tank 1, and an impurity collection tank 72 is placed below the lower end of the slag discharge pipe 71.
[0033] In the above embodiments, the cross section of the mixing tank 1 of the present application is similar to a trapezoid, the impurity collection unit 7 is installed on the inclined side wall on one side thereof, and the slag discharge pipe 71 in the impurity collection unit 7 is installed at the upper position of the side wall, and there is a certain space below the slag discharge pipe 71 for placing the impurity collection tank 72, and when adding nitrate water or chemical additives from the inclined side wall of the mixing tank 1, the inclined side wall of the mixing tank 1 can play a certain role in drainage, preventing the liquid from falling directly from a high place to the liquid surface and splashing water around. And the upper port of the slag discharge pipe 71 is always higher than the liquid level in the mixing tank 1, so that the water in the mixing tank 1 can be prevented from being lost from the slag discharge port. In addition, the upper end of the slag discharge pipe 71 is inclined toward the driving wheel 2, and the distance between the upper end of the slag discharge pipe 71 and the center point of the driving wheel 2 is close to the distance from the outermost side of the impurity storage tank 62 to the center point of the driving wheel 2. In this way, when the screening unit 6 dumps impurities toward the upper end of the slag discharge pipe 71, on the one hand, the slag discharge pipe 71 can collect as much as possible, and on the other hand, the impurity storage tank 62 can smoothly pass through the slag discharge pipe 71 after dumping the impurities.
[0034] Furthermore, if Figure 2 and Figure 3 As shown, the driving wheel 2 is a regular polygon, and a screening unit 6 is installed on each side of the driving wheel 2. The length of the metal screening mesh 61 is equal to the side length of the driving wheel 2; in two adjacent screening units 6, the impurity storage groove 62 in one screening unit 6 is coplanar with the side wall connected to the driving wheel 2 and the metal screening mesh 61 in the other screening unit 6.
[0035] In the above embodiments, the overall profile of the driving wheel 2 of the present application is a regular polygon, so that a straight installation space can be provided at the position of each screening unit 6, so that the metal screening net 61 and the impurity storage slot 62 can be firmly installed on the frame of the driving wheel 2, and the frame of the regular polygon driving wheel 2 can be manufactured more conveniently. The metal screening net 61 of the present application can completely cover the installation holes passing through each side of the driving wheel 2, so that the filtering efficiency of the metal screening net 61 can be improved. If the structure formed by the impurity storage slot 62 and the metal screening net 61 of the present application is dustpan-shaped, the side wall of the impurity storage slot 62 connected to the driving wheel 2 in the screening unit 6 is the inclined wall of the impurity storage slot 62, and the inclined side wall of one of the impurity storage slots 62 is coplanar with the metal screening net 61 in an adjacent screening unit 6, then when the high screening unit 6 dumps impurities, the inclined side wall of the impurity storage slot 62 in the low screening unit 6 can play a smooth guiding effect, so that the impurities can slide smoothly to the slag discharge pipe 71.
[0036] Furthermore, if Figure 3 and Figure 4As shown, the transfer unit 8 includes an overflow trough 81, which is installed at the upper end of the mixing tank 1 away from the slag discharge pipe 71. A filter screen 82 is installed on the side of the overflow trough 81 close to the driving wheel 2. A discharge pipe 83 is provided on the bottom plate of the overflow trough 81. The upper end of the discharge pipe 83 is fixedly connected to the bottom plate of the overflow trough 81, and the lower end of the discharge pipe 83 passes through the adjacent side wall of the mixing tank 1 and is fixedly connected. A transfer water tank 84 is provided below the discharge pipe 83.
[0037] In the above embodiments, the overflow trough 81 of the present application is installed at the upper end of another inclined side wall of the mixing tank 1, and the aperture of the filter screen 82 at its end is similar to the aperture of the metal screening screen 61. When the liquid level in the mixing tank 1 is higher than the bottom plate of the overflow trough 81, the water in the mixing tank 1 will flow in from the filter screen 82 of the overflow trough 81, and then flow along the inclined bottom plate of the overflow trough 81 to its discharge pipe 83, and then enter the transfer water tank 84 through the discharge pipe 83.
[0038] When the solid-liquid separation device of the present application performs primary filtration, the nitrate water discharged from the overflow tank 81 to the transfer tank 84 is the nitrate water that has been initially filtered. When the solid-liquid separation device of the present application performs chemical impurity removal, the nitrate water discharged from the overflow tank 81 to the transfer tank 84 is nitrate water that does not contain solid impurities. The volume of the transfer tank 84 is greater than that of the mixing tank 1, which can increase the single processing capacity of the solid-liquid separation device of the present application.
[0039] Furthermore, if Figure 4 As shown, a partition plate 9 is provided on the side of the slag discharge pipe 71 away from the driving wheel 2, and the partition plate 9 divides the space on the side of the slag discharge pipe 71 in the mixing tank 1 away from the driving wheel 2 into two parts. A cover plate 10 is provided above the partition plate 9, and two feeding ports 11 are provided on the cover plate 10, and the two feeding ports 11 are symmetrical about the partition plate 9.
[0040] In the above embodiments, the partition plate 9 of the present application is arranged in the mixing tank 1 in the above manner, and two independent channels can be formed in the space on the side of the slag discharge pipe 71 away from the driving wheel 2. In this way, when the nitrate water and chemical reagents after the initial filtration are added from the two feeding ports 11 respectively, the nitrate water and the chemical reagents can be prevented from contacting prematurely, and solid precipitates are generated on the inclined wall of the mixing tank 1 which cannot be contacted by the screening unit 6, thereby effectively reducing the workload of subsequent cleaning of the side wall of the mixing tank 1.
[0041] Furthermore, if Figure 1 and Figure 4 As shown, a baffle 12 extending upward is installed on the side of the upper end of the slag discharge pipe 71 away from the driving wheel 2.
[0042] In the above embodiments, the baffle 12 provided on the upper port of the slag discharge pipe 71 of the present application can further prevent the impurities from falling outside the slag discharge pipe 71 when the screening unit 6 dumps the impurities, thereby improving the collection effect of the slag discharge pipe 71 on impurities.
[0043] The implementation principle of this embodiment is as follows: when it is necessary to perform preliminary filtration on nitrate water containing multiple impurities, the nitrate water can be firstly added to the mixing tank 1 from a feed port 11 above the mixing tank 1 through a water pump, and the drive motor 5 is started. The drive motor 5 can drive the drive wheel 2 to rotate through a belt drive. After the screening unit 6 on the drive wheel 2 contacts the water, the nitrate water enters the space between the impurity storage tank 62 and the metal screening net 61 from the open opening of the impurity storage tank 62. The metal screening net 61 can intercept large particles of impurities in the nitrate water, thereby completing the separation and filtration effect of large particles of impurities in the nitrate water. Then, when turning from the top of the drive wheel 2 to the impurity collecting unit 7, the impurities between the metal screening net 61 and the impurity storage tank 62 will flow into the upper port of the slag discharge pipe 71 along the inclined wall of the metal screening net 61 in the screening unit 6 adjacent to the metal screening net 61 below under the action of gravity, and then flow into the upper port of the slag discharge pipe 71 under the guidance of the slag discharge pipe 71. After falling into the impurity collecting pool 72, when the water level in the mixing pool 1 is higher than the bottom plate of the overflow tank 81, the nitrate water in the mixing pool 1 will flow into the overflow tank 81 from the filter screen 82, and the filter screen 82 can intercept a small amount of solid impurities that may still exist in the nitrate water, so that they remain in the mixing pool 1 and are processed by the screening unit 6, and then discharged into the transfer pool 84 through the discharge pipe 83 on the overflow tank 81. With the continuous addition of nitrate water containing multiple impurities in the mixing pool 1, the mixing pool 1 can continuously discharge the nitrate water that has passed the initial filtration into the transfer pool 84, until the transfer pool 84 is almost full, stop adding the nitrate water containing multiple impurities into the mixing pool 1, use a water pump to pump the residual nitrate water in the mixing pool 1 to the front end of the filter screen 82 in the overflow tank 81, and use the filter screen 82 to process the remaining nitrate water; or after the transfer pool 84 is filled, the residual nitrate water in the mixing pool 1 is fully pumped back to the source of the nitrate water with multiple impurities.
[0044] Next, workers will check the equipment and see if it needs to be cleaned according to the situation. After the equipment is handled, a water pump is used to pump the nitrate water that has been initially filtered in the transfer pool 84 to the feeding port 11 where the nitrate water with multiple impurities is first added, and chemical reagents are added to the mixing pool 1 in proportion from another feeding port 11. Then the drive motor 5 is started, and the drive wheel 2 drives the screening unit 6 to rotate in the mixing pool 1 while stirring the chemical reagents and the initially filtered nitrate water, so that they are fully in contact and react. When the initially filtered nitrate water reacts with the chemical reagent to produce solid precipitates, the impurity storage tank 62 and the metal screening net 61 of the screening unit 6 can capture them during the rotation process, and then discharge the captured impurities into the impurity collection tank 72 during the rotation process. The working principle is similar to the principle of separating large particle impurities in the nitrate water during the initial filtration. When the liquid level in the mixing pool 1 is higher than the bottom plate of the overflow tank 81, the nitrate water in the mixing pool 1 will It flows into the overflow tank 81 from the filter screen 82, and then is discharged into the transfer water tank 84 through the discharge pipe 83. At this time, the filter screen 82 can intercept the solid impurities in the nitrate water to ensure that the nitrate water entering the transfer water tank 84 does not contain solid impurities. At this time, there are two types of nitrate water in the transfer water tank 84, one is the nitrate water that has not been chemically removed but has been initially filtered, which can be called Class A nitrate water, and the other is the nitrate water that has been chemically removed, which can be called Class B nitrate water. As the water pump continuously delivers the mixture of Class A nitrate water and Class B nitrate water in the transfer water tank 84 to the mixing tank 1, the amount of Class A nitrate water will continue to decrease. Finally, as long as the concentration of metal ion impurities detected in the transfer water tank 84 meets the requirements, the raw materials can be stopped from being transported to the mixing tank 1. There is no need to remove all impurities in the nitrate water in this process, because the low-impurity nitrate water after chemical removal will be further removed by freezing crystallization and centrifugal separation in the future. At this time, the nitrate water remaining in the mixing tank 1 can be pumped into a special barrel by a water pump (preferably a sewage pump) for storage, and then chemically removed together with the next batch of nitrate water during the next chemical removal. The nitrate water remaining in the mixing tank 1 can also be pumped to the front side of the filter screen 82 in the overflow tank 81 to filter it, and then put it into the transfer tank 84 together with the nitrate water that has been chemically removed to continue the next step of operation. The specific method can be flexibly selected by the manufacturer according to the actual situation.
[0045] Since the present application can realize the primary filtration and chemical impurity removal of Glauber's salt by one device, the production cost is effectively reduced compared with the prior art. In addition, the screening unit 6 and the driving wheel 2 of the present application can not only capture impurities in the nitrate water when rotating, but also fully stir the water in the mixing tank 1, which can improve the separation effect of the nitrate water and solid impurities in the mixing tank 1 on the one hand, and improve the reaction efficiency of the chemical reagent and the nitrate water after the primary filtration during chemical impurity removal on the other hand.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A solid-liquid separation device for producing sodium sulfate, characterized in that: The invention comprises a mixing tank (1), wherein a driving wheel (2) is provided inside the mixing tank (1), a driving shaft (3) is provided through the center of the driving wheel (2) and the two are fixedly connected, a bearing support (4) is fixedly installed on each of the opposite side walls in the width direction of the mixing tank (1), the two ends of the driving shaft (3) are respectively inserted into the two bearing supports (4), and the two ends of the driving shaft (3) are rotatably connected to the two bearing supports (4), one end of the driving shaft (3) is connected to a driving motor (5) through a motor belt, and the driving motor (5) is installed on the outer shell of the mixing tank (1); A plurality of screening units (6) are evenly arranged on the circumference of the driving wheel (2), and the screening units (6) can salvage solid impurities in the nitrate water in the mixing tank (1) when the driving wheel (2) rotates; An impurity collecting unit (7) is provided on one side of the mixing tank (1) in the longitudinal direction, and the impurity collecting unit (7) can collect solid impurities in the screening unit (6); a transfer unit (8) is provided on the other opposite side of the mixing tank (1) in the longitudinal direction, and the transfer unit (8) can temporarily store liquid in the mixing tank (1).
2. The solid-liquid separation device for producing sodium sulfate according to claim 1, characterized in that: The screening unit (6) comprises a metal screening net (61), the metal screening net (61) being fixedly mounted on the frame of the driving wheel (2), the outer side of the metal screening net (61) being fixedly connected to an impurity storage groove (62), one end of the impurity storage groove (62) being open, and when the impurity storage groove (62) moves from top to bottom toward the impurity collecting unit (7) along with the driving wheel (2), the open end of the impurity storage groove (62) faces the impurity collecting unit (7).
3. The solid-liquid separation device for producing sodium sulfate according to claim 2, characterized in that: The impurity collection unit (7) comprises a slag discharge pipe (71), the slag discharge pipe (71) being fixedly mounted on a side wall of the mixing tank (1) in the length direction, and the lower end of the slag discharge pipe (71) passes through the side wall at a corresponding position of the mixing tank (1), and an impurity collection tank (72) is placed below the lower end of the slag discharge pipe (71).
4. The solid-liquid separation device for producing sodium sulfate according to claim 2, characterized in that: The driving wheel (2) is a regular polygon, and a screening unit (6) is mounted on each side of the driving wheel (2), and the length of the metal screening net (61) is equal to the length of the side of the driving wheel (2); in two adjacent screening units (6), the side wall of the impurity storage groove (62) in one of the screening units (6) connected to the driving wheel (2) and the metal screening net (61) in the other screening unit (6) are coplanar.
5. The solid-liquid separation device for producing sodium sulfate according to claim 3, characterized in that: The transfer unit (8) comprises an overflow trough (81), the overflow trough (81) being installed at the upper end of a side of the mixing tank (1) away from the slag discharge pipe (71), a filter screen (82) being installed at a side of the overflow trough (81) close to the driving wheel (2), a discharge pipe (83) being provided on the bottom plate of the overflow trough (81), the upper end of the discharge pipe (83) being fixedly connected to the bottom plate of the overflow trough (81), the lower end of the discharge pipe (83) penetrating the adjacent side wall of the mixing tank (1) and the two being fixedly connected, and a transfer water tank (84) being provided below the discharge pipe (83).
6. The solid-liquid separation device for producing sodium sulfate according to claim 3, characterized in that: A partition plate (9) is provided on the side of the slag discharge pipe (71) away from the driving wheel (2), and the partition plate (9) divides the space on the side of the slag discharge pipe (71) in the mixing tank (1) away from the driving wheel (2) into two parts. A cover plate (10) is provided above the partition plate (9), and two feeding ports (11) are provided on the cover plate (10), and the two feeding ports (11) are symmetrical about the partition plate (9).
7. The solid-liquid separation device for producing sodium sulfate according to claim 6, characterized in that: A baffle (12) extending upward is installed on the side of the upper end of the slag discharge pipe (71) away from the driving wheel (2).