A horizontal dehydration and drying equipment and design method thereof

Abstract

The present application discloses a horizontal dehydration and drying device, including a drying kettle, a rotating shaft, a first stirring component and a second stirring component, wherein the rotating shaft is horizontally rotatably installed on the drying kettle and is coaxially arranged with the drying kettle, and the first stirring component and the second stirring component are both installed on the rotating shaft; and a design method of a horizontal dehydration and drying device is also disclosed. The present application has the following beneficial effects: a first stirring component and a second stirring component are provided, the first stirring component can stir the material and convey it in a first direction, and the second stirring component can stir the material and convey it in a second direction, and the two conveying directions are opposite and parallel to the axis of the drying kettle, and the material can maintain a dynamic balance during the conveying process, so that the mixing effect of the material can be greatly improved when it is mixed, and the stratification phenomenon can be avoided.

Description

Technical Field

[0001] The present application relates to the technical field of drying equipment, and in particular to a horizontal dehydration drying equipment and a design method thereof. Background Art

[0002] For a horizontal dryer, a stirring structure is installed in the drying kettle to stir and mix the materials so that they are dried evenly. The stirring structure mainly includes a rotating shaft and stirring blades installed outside the rotating shaft. However, the existing stirring blades have a simple structure, and the materials may be stratified after mixing, that is, the materials in the areas corresponding to the stirring blades in the drying kettle cannot be fully mixed, and the stirring effect is poor. Therefore, a horizontal dehydration drying device and a design method thereof are proposed to solve the above technical problems. Summary of the invention

[0003] One of the purposes of the present application is to provide a horizontal dehydration and drying device.

[0004] Another object of the present application is to provide a design method for horizontal dehydration and drying equipment.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a horizontal dehydration and drying equipment, comprising a drying kettle, a rotating shaft, a first stirring component and a second stirring component, wherein the rotating shaft is horizontally rotatably installed on the drying kettle and is coaxially arranged with the drying kettle, and the first stirring component and the second stirring component are both installed on the rotating shaft; when stirring, the first stirring component is suitable for mixing the materials in the drying kettle and conveying them in a first direction, and the second stirring component is suitable for mixing the materials in the drying kettle and conveying them in a second direction, wherein the first direction and the second direction are opposite and are both parallel to the axis of the rotating shaft.

[0006] Preferably, the rotating shaft forms a connection with the inner side of the drying kettle, and a blowing mechanism cooperating with the rotating shaft is installed on the outer side of the drying kettle; when stirring is performed, the blowing mechanism is suitable for ejecting airflow from the outside of the rotating shaft, and then the airflow is driven by the rotating shaft to form an air curtain, and the air curtain is suitable for isolating the connection from the material.

[0007] Preferably, a stirring rod perpendicular to the rotating shaft is installed on the outside of the rotating shaft, the first stirring component includes a first stirring blade, the second stirring component includes a second stirring blade, the first stirring blade and the second stirring blade are both installed on the outside of the stirring rod and are arranged at intervals, the first stirring blade and the second stirring blade are both inclined relative to the axis of the rotating shaft and the inclination directions of the two are opposite; and the first stirring blade and the second stirring blade both adopt a spiral structure to form a spiral belt.

[0008] Preferably, a flow channel is provided inside the rotating shaft, and the blowing mechanism includes an air inlet pipe and a sleeve, the sleeve is installed on the outside of the drying kettle and is rotatably sleeved with the rotating shaft, the air inlet pipe is installed outside the sleeve and is connected to the annular cavity inside the sleeve, the first end of the flow channel is connected to the annular cavity, and the second end of the flow channel is located outside the rotating shaft and corresponds to the connection.

[0009] Preferably, a plurality of drainage outlets are provided at the bottom end of the drying kettle, and a filter element is detachably installed in the drainage outlet; the drainage outlet is also suitable for cooperating with an air source, and the air source is suitable for conveying airflow from the drainage outlet to the bottom end of the interior of the drying kettle to make the material boil; a bushing is installed in the bottom end of the drying kettle, and the filter element comprises a filter cartridge, which is plugged and installed in the bushing; the filter cartridge comprises a mounting portion, an integrally formed cylinder body and a filter screen, the filter screen is located at the top end of the cylinder body, and the mounting portion is arranged at the outer bottom end of the cylinder body; during installation, the cylinder body is suitable for inserting the bushing until the filter screen cooperates with the inner bottom end of the drying kettle, and the mounting portion is detachably connected to the bushing.

[0010] The design method of the horizontal dehydration drying equipment as mentioned above includes the following steps: S100: obtaining the conveying volume Q based on the model size of the drying kettle; S200: preliminarily determining the basic size of the stirring structure through the calculation formula of the conveying volume Q; S300: the conveying volume Q includes the sum of the material conveying volumes in the two directions in the drying kettle, which are Q 左 and Q 右 , based on Q 左 =Q 右 Then the optimal size of the stirring structure is obtained; S400: the obtained optimal size is substituted into the power calculation formula to obtain the total output power P of the stirring structure, and then the motor model used to drive the stirring structure is selected.

[0011] Preferably, in step S300, the formula for calculating the delivery amount in one direction in the drying kettle is: Q'=47×β×σ×ρ×[π×(D 2 -d 2 ) / 4]×S×n×a; where β is the inclination angle coefficient of the drying kettle, σ is the material capacity weight (charging coefficient), ρ is the material density, D is the major diameter of the spiral ribbon, d is the minor diameter of the spiral ribbon, S is the pitch of the spiral ribbon, n is the number of revolutions, and a is the continuity coefficient of the material.

[0012] Preferably, the inclination angle range of the drying kettle is 0≤θ≤20°; when θ=0, β=1; when 0<θ≤5, β=0.9; when 5<θ≤10, β=0.8; when 10<θ≤15, β=0.7; when 15<θ≤20, β=0.65.

[0013] Preferably, in step S400, the total output power P of the stirring structure is P 左 +P 右 The output power in one direction in the drying kettle is P'=Q'×(ω×L+H) / 367+D×L / 20; where ω is the resistance safety factor, L is the screw length, and H is the material conveying height.

[0014] Preferably, in step S400, the rated power of the motor=kp, k is a safety margin, wherein 1.2≤k≤2.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The present invention is provided with a first stirring component and a second stirring component. The first stirring component can stir the material and transport it in a first direction, while the second stirring component can stir the material and transport it in a second direction. The two transporting directions are opposite and parallel to the axis of the drying kettle. In addition, the material can maintain a dynamic balance during the transporting process, which can greatly improve the mixing effect of the material when it is mixed and avoid stratification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of the stirring structure of the present invention.

[0018] Figure 2 It is a schematic diagram of two stirring components of the present invention being installed on a stirring rod.

[0019] Figure 3 It is a schematic diagram of two stirring blades on the stirring rod of the present invention being installed at an angle.

[0020] Figure 4 It is a schematic diagram of the projection of adjacent stirring blades after multiple groups of stirring rods of the present invention are installed.

[0021] Figure 5 The schematic diagram of the scraper installed on the scraping and stirring structure of the present invention.

[0022] Figure 6 It is a schematic diagram of the conveying direction of materials when the stirring structure in the drying kettle of the present invention is working.

[0023] Figure 7 It is a schematic diagram of the enlarged structure of point A of the present invention.

[0024] Figure 8 It is a schematic diagram of the enlarged structure of point C of the present invention.

[0025] Fig. 9 It is a schematic diagram of the enlarged structure of point B of the present invention.

[0026] Fig.10 It is a schematic diagram of the filter structure of the present invention.

[0027] Fig.11 It is a schematic diagram of the major diameter, minor diameter and screw length of the spiral ribbon in the present invention.

[0028] In the figure: 1, rotating shaft; 101, central axis; 102, mounting shaft; 2, first stirring component; 201, first stirring blade; 3, second stirring component; 301, second stirring blade; 4, stirring rod; 5, scraper; 6, drying kettle; 7, purge port; 8, discharge port; 9, plunger discharge valve; 10, blowing mechanism; 1001, air inlet pipe; 1002, sleeve; 11, flow channel; 1101, air inlet groove; 1102, air outlet groove; 1103, inner groove; 12, connection; 13, one-way valve; 14, annular cavity; 15, drain outlet; 16, filter element; 1601, cylinder; 1602, filter screen; 1603, mounting part; 17, bushing. DETAILED DESCRIPTION

[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] One of the preferred embodiments of the present application is as follows: Figures 1 to 11As shown, a horizontal dehydration drying device includes a drying kettle 6 and a stirring structure, and the stirring structure includes a rotating shaft 1, a first stirring component 2 and a second stirring component 3. The rotating shaft 1 is horizontally rotatably installed on the drying kettle 6 and is coaxially arranged with the drying kettle 6, and the first stirring component 2 and the second stirring component 3 are both installed on the rotating shaft 1. It can be understood that when stirring, the rotating shaft 1 will rotate under the action of an external driving device (such as a motor), so the stirring components (i.e., the first stirring component 2 and the second stirring component 3) will rotate in a circle to stir and mix the materials, and at the same time, the first stirring component 2 can transport the materials in a first direction, and the second stirring component 3 can transport the materials in a second direction, so that the materials can be fully mixed and stirred, and the stirring effect is greatly improved; wherein the first direction and the second direction are opposite and are both parallel to the axis of the rotating shaft 1.

[0033] For example, Figure 6 As shown, at this time, the first stirring component 2 is set to make the material conveying direction f (to the left), and the second stirring component 3 is set to make the material conveying direction e (to the right), so that the material can circulate during the stirring process and maintain a dynamic balance in the drying kettle 6, thereby effectively avoiding the stratification of the material in the drying kettle 6. In addition, the conveying directions of the first stirring component 2 and the second stirring component 3 are opposite, which can further improve the stirring efficiency and ensure the uniform mixing of the material in the drying kettle 6. In practical applications, this stirring structure is particularly suitable for materials with poor fluidity, such as high-viscosity liquids, mixtures containing solid particles, powders, etc.

[0034] Of course, there are many structural forms of the first stirring component 2 and the second stirring component 3. A specific embodiment is provided below for illustration:

[0035] like Figure 2 and Figure 3 As shown, a stirring rod 4 is installed on the outside of the rotating shaft 1 and is perpendicular to it. The first stirring component 2 includes a first stirring blade 201, and the second stirring component 3 includes a second stirring blade 301. The first stirring blade 201 and the second stirring blade 301 are both installed on the outside of the stirring rod 4 and are arranged at intervals. The first stirring blade 201 and the second stirring blade 301 are both inclined relative to the axis of the rotating shaft 1 and the inclination directions of the two are opposite.

[0036] It should be known that, since the first stirring blade 201 and the second stirring blade 301 are both inclined, the two stirring blades will also generate a thrust along the axial direction of the rotating shaft 1 on the material when they rotate in a circle, and the two stirring blades have different inclination directions, for example, one is inclined to the left and the other is inclined to the right, so that the following can be generated: Figure 6 The material shown is transported in two directions.

[0037] Furthermore, in order to improve the conveying effect, Figure 2 As shown, the above-mentioned inclined stirring blades can adopt a spiral structure to form a spiral ribbon, so that the material can move along the spiral path during the stirring process, thereby improving the conveying effect and improving the mixing uniformity. In addition, the stirring blades with a spiral structure (i.e., spiral ribbons) can also reduce the shear force of the material during the stirring process, which is particularly important for protecting the physical properties of the material, especially when handling sensitive or fragile materials. In practical applications, the design of this spiral stirring blade can effectively improve the stirring efficiency, reduce energy consumption, and can adapt to materials of different types and viscosities. By adjusting the pitch and inclination angle of the stirring blade spiral, the stirring effect can be further optimized to meet specific process requirements.

[0038] Based on the above embodiments, in this embodiment, if Figure 3 As shown, the first stirring blade 201 and the second stirring blade 301 are both inclined at an angle α relative to the axis of the rotating shaft 1 (ie, the two are symmetrically inclined), wherein 10°≤α≤30°.

[0039] It is understandable that if the inclination angle of the stirring blade is too small (for example, less than 10°), the stirring blade will have a poor effect on pushing the material, thereby causing poor material conveying effects along the first direction and the second direction. If the inclination angle of the stirring blade is too large (for example, greater than 30°), although it can have a good material conveying effect, Figure 4 As shown, the greater the inclination angle of the stirring blade, the shorter its projection on the axis of the rotating shaft 1 will be, which will reduce the stirring range of the stirring blade and the material, that is, the stirring effect will be greatly reduced; of course, more stirring blades can be provided, but this will make the structure more complicated and increase the cost. Therefore, the inclination angle α is preferably set between 10° and 30°, for example, it is preferably set to be inclined at 15°.

[0040] Furthermore, in order to improve the mixing and conveying effect of materials, Figure 1 As shown, the stirring rods 4 are provided in multiple groups and are arranged at equal intervals, and adjacent stirring rods 4 are perpendicular to each other, so that the projections of adjacent first stirring components 2 and second stirring components 3 along the axis of the rotating shaft 1 at least partially overlap.

[0041] Specifically, Figure 4 As shown, we assume that there are four groups of stirring rods 4, the rightmost (fourth) stirring rod 4 is vertically arranged, and the third stirring rod 4 is horizontally arranged, and so on, the second stirring rod 4 is vertically arranged, and the first stirring rod 4 is horizontally arranged; that is, the installation positions of two adjacent stirring rods 4 are staggered, and the two stirring blades on the same stirring rod 4 have the same projection length toward the axis of the rotating shaft 1.

[0042] For example, Figure 4As shown, we take the first and second stirring rods 4 on the left side as examples for explanation. The two ends of the stirring blade on the first stirring rod 4 are projected toward the axial direction of the rotating shaft 1 at points a and c, and the projection length is ac. The stirring blade on the second stirring rod 4 is projected toward the axial direction of the rotating shaft 1 at points b and d, and the projection length is bd. And ac and bd have an overlapping part, namely bc. It can be understood that, that is to say, the mutual cooperation of the multiple stirring blades makes the projection in the axial direction of the rotating shaft 1 continuous, and the rotating shaft 1 coincides with the center line of the drying kettle 6. Therefore, the stirring range of the multiple stirring blades in the axial direction of the drying kettle 6 is continuous, so that the material in the drying kettle 6 can be fully stirred and the stirring effect can be improved.

[0043] Furthermore, Figure 1 As shown, the stirring rods 4 are symmetrically arranged and distributed with respect to the axis of the rotating shaft 1; for example, the stirring rods 4 are arranged in four groups, and in this case, the stirring rods 4 are arranged in eight groups. This symmetrically distributed design of the stirring rods 4 not only ensures the uniformity of stirring, but also helps to achieve uniform mixing of the materials in the drying kettle 6. In actual production, this design can effectively avoid the generation of stirring dead angles and ensure the stability and reliability of the stirring effect.

[0044] Based on the above embodiments, in this embodiment, if Figure 1 As shown, the first stirring blade 201 and the second stirring blade 301 are both installed on the first orientation side of the stirring rod 4. It can be understood that when rotating, assuming that the rotating shaft 1 rotates in the first orientation (i.e., rotates counterclockwise), the stirring rod 4 can support the two stirring blades. Specifically, the first orientation side can be understood as the installation position where the stirring rod 4 can support the stirring blades when rotating. For example, when stirring, the stirring blades will have a thrust effect on the material, and the material has a reaction force on the stirring blades. At this time, the stirring rod 4 can support the force it receives, thereby making the installation of the stirring blades more stable.

[0045] In one of the embodiments of the present application, Figure 5 As shown, since the material will adhere to the inner wall of the drying kettle 6 during stirring, thereby reducing the flow effect of the material, a scraper 5 can be installed on the outside of the stirring component. Of course, the scraper 5 can be installed on the outside of both stirring components, or a scraper 5 can be installed on one of the stirring components; the specific installation position can be set by technicians in this field according to actual conditions.

[0046] For example, Figure 6As shown, the drying kettle 6 is a horizontal structure, so the materials are easily accumulated at the two ends and the bottom of the drying kettle 6, and we can install the first stirring blade 201 close to the bottom or top of the drying kettle 6, so that the first stirring blade 201 can play the role of scraping materials. Therefore, we can install the scraper 5 on the two first stirring blades 201 at both ends of the rotating shaft 1, and after installation, the scraper 5 is close to or against the two ends of the drying kettle 6, and then during stirring, the materials adhered to the inner wall of the drying kettle 6 can be scraped off well to prevent the accumulation of materials.

[0047] In this embodiment, Figure 1 As shown, the two ends of the rotating shaft 1 are matched with the two ends of the drying kettle 6 in actual use, so not all parts of the rotating shaft 1 are equipped with the stirring rod 4, that is, the stirring rod 4 is mainly installed in the middle of the rotating shaft 1, so the middle of the rotating shaft 1 is more easily damaged by the force, and if the entire rotating shaft 1 is replaced when a failure occurs, the cost will be greatly increased. Therefore, the rotating shaft 1 includes a central shaft 101 and a pair of mounting shafts 102, and the two ends of the central shaft 101 are detachable and matched with the corresponding mounting shafts 102, and the first stirring assembly 2 and the second stirring assembly 3 are both installed on the central shaft 101.

[0048] For example, Figure 1 As shown, flanges can be provided at both ends of the central shaft 101, and flanges are also provided at the corresponding mounting ends of the mounting shaft 102 and the central shaft 101, and the detachable mounting of the two can be achieved through the cooperation of the flanges and bolts. Therefore, when any one of the central shaft 101 and the two mounting shafts 102 is damaged, it can be disassembled and replaced accordingly without replacing the entire rotating shaft 1, which greatly saves costs.

[0049] like Figure 6 and Figure 7 As shown, the rotating shaft 1 is rotatably installed in the drying kettle 6 and forms a connection 12 with the inner side of the drying kettle 6, so people will seal this connection 12, for example, a sealing ring is provided; because the drying kettle 6 is horizontal, when the material is high, it will "flood" this connection 12, especially when the material contains powder, and the particle size of the powder is small, it is easy to enter the connection 12 between the rotating shaft 1 and the drying kettle 6, thereby affecting the service life of the rotating shaft 1. Therefore, a blowing mechanism 10 can be installed on the outside of the drying kettle 6, and the blowing mechanism 10 and the rotating shaft 1 are matched.

[0050] It is understandable that, when drying, the blowing mechanism 10 can eject airflow from the outside of the rotating shaft 1, and the ejection position corresponds to the connection 12. We know that the stirring structure will also operate at this time, that is, the rotating shaft 1 will also rotate, so the ejected airflow will also make a circular motion, and then the rotating ejected airflow will form an air curtain, so that the air curtain can isolate the connection 12 from the material, which greatly reduces the probability of materials with smaller particle sizes entering the connection 12, thereby effectively protecting the sealing between the rotating shaft 1 and the drying kettle 6. In addition, the setting of the blowing mechanism 10 is not limited to isolating the connection 12, but can also play an auxiliary stirring role during the drying process, so that the distribution of the material in the drying kettle 6 is more uniform, and the drying efficiency is improved.

[0051] As a further description of the above embodiment: Figure 7 As shown, a flow channel 11 is provided inside the rotating shaft 1, and the blowing mechanism 10 includes an air inlet pipe 1001 and a sleeve 1002. The sleeve 1002 is installed on the outside of the drying kettle 6 and is rotatably sleeved with the rotating shaft 1. For example, the sleeve 1002 is rotatably sealed with the rotating shaft 1 through a bearing; and an annular cavity 14 is provided on the inner side of the sleeve 1002. The annular cavity 14 and the rotating shaft 1 are matched so as to be disconnected from the outside, and the air inlet pipe 1001 is installed outside the sleeve 1002 and is connected to the annular cavity 14 in the sleeve 1002. The first end of the flow channel 11 is connected and matched with the annular cavity 14, and the second end of the flow channel 11 is located outside the rotating shaft 1 and corresponds to the connection 12.

[0052] It is understandable that when drying is carried out, compressed gas can be injected into the air inlet pipe 1001 through an air pump, and then the gas will enter the annular cavity 14. The gas in the annular cavity 14 will enter from the first end of the flow channel 11, and then be ejected from the second end of the flow channel 11 to the connection 12, and form an air curtain under the rotation of the shaft 1.

[0053] It should be noted that, since the annular cavity 14 is annular and the first end of the flow channel 11 is connected and matched with the annular cavity 14 , no matter how the rotating shaft 1 rotates, the flow channel 11 and the annular cavity 14 are always in a connected state.

[0054] In this embodiment, Figure 7As shown, the flow channel 11 includes an air inlet groove 1101, an air outlet groove 1102 and an inner groove 1103, and each groove can be processed in the following manner: first, the inner groove 1103 is drilled at the end of the rotating shaft 1 along its axial direction, and then the air inlet groove 1101 and the air outlet groove 1102 are respectively drilled on the outside of the rotating shaft 1 along its radial position, so that the air inlet groove 1101 and the air outlet groove 1102 are both connected to the inner groove 1103, and finally the end of the rotating shaft 1 is sealed (that is, the end of the inner groove 1103 is sealed), so that the entire flow channel 11 can be formed. The inner groove 1103 can also be arranged in the following manner: the part of the rotating shaft 1 that cooperates with the blowing mechanism 10 adopts a hollow tube with sufficient strength, and then the two ends of the hollow tube are sealed to form the inner groove 1103.

[0055] Specifically, Figure 7 As shown, the first end of the air inlet groove 1101 forms the first end of the flow channel 11, the second end of the air inlet groove 1101 is connected to the inner groove 1103, the first end of the air outlet groove 1102 is connected to the inner groove 1103, and the second end of the air outlet groove 1102 forms the second end of the flow channel 11. It can be understood that the flow direction of the air flow is: from the air inlet pipe 1001 to the annular cavity 14, from the annular cavity 14 to the air inlet groove 1101, from the air inlet groove 1101 to the inner groove 1103, from the inner groove 1103 to the air outlet groove 1102, and finally the air flow is ejected from the air outlet groove 1102 to the connection 12.

[0056] Further, such as Figure 7 As shown, if the air inlet groove 1101 and the air outlet groove 1102 are set to be single, it will have a greater impact on the air intake and air outlet. Therefore, the air inlet groove 1101 and the air outlet groove 1102 can be set to multiple and equidistantly arranged, which can greatly improve the uniformity of the air flow in and out and the air flow. At the same time, in order to prevent the material in the drying kettle 6 from flowing back into the flow channel 11, a one-way valve 13 can be set at the second end of the air outlet groove 1102, thereby protecting the normal operation of the blowing mechanism 10 and extending its service life.

[0057] In one of the embodiments of the present application, Figure 6 As shown, a feeding port 8 is provided on one side (left side) of the bottom end of the drying kettle 6, and a purge port 7 is provided on the other side (right side) of the bottom end of the drying kettle 6. It can be understood that when feeding, the feeding port 8 is opened, and the purge port 7 can be connected to an external air pump, so that the purge port 7 can generate a strong airflow purge force, and then the materials on the right side are blown and accumulated near the feeding port 8 on the left side, so as to achieve fast and smooth feeding and prevent the materials in the drying kettle 6 from being discharged incompletely. Of course, in order to ensure the purge effect, the purge port 7 can be designed to be adjustable so as to adjust the purge force and angle according to different material characteristics and drying requirements.

[0058] Further, such as Figure 6 As shown, a plunger discharge valve 9 can be installed at the discharge port 8 to realize the opening and closing of the discharge port 8. When the plunger discharge valve 9 is closed, the valve core of the plunger discharge valve 9 is flush with the inner bottom end of the drying kettle 6, that is, at this time, the discharge port 8 can be closed and flush with the bottom end of the kettle, so that no dead angle (area) will be generated at the discharge port 8, thereby avoiding the accumulation of materials and water here, and further improving the uniformity of drying. Of course, the specific structure of the plunger discharge valve 9 is also common knowledge known to those skilled in the art, so it will not be repeated.

[0059] like Figure 6 and Fig. 9 As shown, a plurality of equally spaced drain ports 15 may be provided at the bottom of the drying kettle 6, and a filter element 16 may be detachably installed in the drain port 15, so that the moisture contained in the material in the drying kettle 6 may be discharged through the action of the drain port 15 and the filter element 16.

[0060] It is worth mentioning that after the material is drained, the drain port 15 can also play such a role, that is, the drain port 15 can be connected and cooperated with an external air source (such as an air pump). During drying, the air pump transports the airflow from the drain port 15 to the bottom end of the drying kettle 6, which can make the material have a boiling effect. On the one hand, this improves the drying effect between the materials, and on the other hand, it can prevent the materials from adhering and accumulating at the bottom end of the drying kettle 6, thereby further promoting the drying uniformity of the materials.

[0061] As a further description of the above embodiment, Fig. 9 and Fig.10 As shown, the filter element 16 can adopt such a structure and installation method: a trough body connected to the drying kettle 6 is provided at the bottom end thereof, a bushing 17 is fixedly installed in the trough body, and the filter element 16 includes a filter cartridge, that is, a cylindrical structure, and the filter cartridge can be inserted into the bushing 17 for installation, which can facilitate the installation and disassembly of the filter element 16 at a later stage.

[0062] Specifically, Fig.10 As shown, the filter cartridge includes a mounting portion 1603, an integrally formed cylinder 1601 and a filter screen 1602. The filter screen 1602 is located at the top of the cylinder 1601, that is, the top of the cylinder 1601 is provided with filter holes arranged at equal distances to form the filter screen 1602; the mounting portion 1603 is provided at the outer bottom of the cylinder 1601. It can be understood that during installation, the cylinder 1601 can be inserted into the bushing 17 until the filter screen 1602 is matched with the inner bottom of the drying kettle 6, and then the mounting portion 1603 and the bushing 17 can be fixedly connected by screws.

[0063] It should be known that the outer shell of the drying kettle 6 has a certain thickness, and the installation of the filter 16 must be provided with a trough body at the bottom of the kettle. If the filter 16 is installed at the bottom of the trough body, materials will be accumulated in the trough body, which may form a drying dead corner or a material feeding dead corner; and if the filter 16 is installed at the top of the trough body and is flush with the inner bottom of the drying kettle 6, the trough body has a certain depth, which will cause certain difficulties in the later installation and removal of the filter 16. The above-mentioned cylindrical structural design can improve its disassembly efficiency while ensuring the installation effect. At the same time, the setting of the cylinder 1601 can also support the relatively weak filter screen 1602 at the top, greatly improving the strength and installation stability of the filter 16.

[0064] Further, such as Figure 6 As shown, since the drying kettle 6 is a horizontal structure, the material will easily accumulate on the top of the filter element 16 (i.e., the filter screen 1602), thereby causing the filter element 16 to be blocked. In order to solve this problem, as shown in FIG. Fig. 9 As shown, a plurality of stirring blades (such as the first stirring blade 201) that cooperate with the filter element 16 can be installed on the outside of the rotating shaft 1; that is, when the stirring structure is stirring the material, the stirring blade can clean the material on the filter element 16 under the driving action of the rotating shaft 1, thereby solving the problem of material accumulation and blockage, that is, the stirring blade at this time not only plays a stirring role but also plays a role of a "scraper 5".

[0065] Another aspect of the present application also provides a design method for a horizontal dehydration and drying device, comprising the following steps:

[0066] S100: First, the total conveying volume Q is determined according to the model and size of the drying kettle 6 and the material processing volume required for drying.

[0067] S200: Preliminarily determine the basic size of the stirring structure through the calculation formula of the conveying amount Q.

[0068] S300: From the above, it can be seen that Figure 6 As shown, the stirring structure can transport the material in the first direction and the second direction, which can be understood as transporting to the left and transporting to the right, so Q=Q 左 +Q 右 It should be noted that in order to maintain the dynamic balance of material transportation in the drying kettle 6, the material transportation amount in both directions is equal (i.e. Q 左 =Q 右 ), and then based on Q 左 =Q 右Then, the optimal size of the stirring structure is obtained, for example, the specific shape and structural parameters of the spiral ribbon (ie, the first stirring blade 201 and the second stirring blade 301) are adjusted.

[0069] S400: Substitute the obtained optimal size into the power calculation formula to obtain the total output power P of the stirring structure, and then select the motor model for driving the stirring structure; and then complete the design and selection of the stirring structure and the driving motor of the drying kettle 6.

[0070] Specifically, in step S300, the calculation formula for the conveying amount of the drying kettle 6 in a single direction (ie, to the left or to the right) is: Q 左 =Q 右 =Q'=47×β×σ×ρ×[π×(D 2 -d 2 ) / 4]×S×n×a. Among them, β is the inclination angle coefficient of the drying kettle, σ is the material capacity weight (charging coefficient), ρ is the material density, D is the major diameter of the spiral ribbon, d is the minor diameter of the spiral ribbon, S is the pitch of the spiral ribbon, n is the number of revolutions, and a is the continuity coefficient of the material.

[0071] It should be known that from the above formula, it can be concluded that the material conveying capacity mainly depends on the specific structural parameters of the spiral ribbon in the mixing structure, such as Fig.11 The specific parameter design of the major and minor diameters of the spiral ribbon is the key to the material conveying capacity. Therefore, by adjusting the parameters such as the diameter, pitch and rotation speed of the spiral ribbon, the conveying capacity and speed of the material in the drying kettle 6 can be accurately controlled to meet the drying requirements of different materials. Of course, in practical applications, the characteristics of the material, such as viscosity, density and other factors, must also be considered to ensure the rationality of the stirring structure design and maximize the drying efficiency.

[0072] Furthermore, in the actual use of the horizontal dehydration drying equipment, in order to facilitate the convenience of material unloading in the later stage, the drying kettle 6 is usually set at an angle. We can set the angle of inclination to θ, so that in the later unloading process, the material can be unloaded more thoroughly under the cooperation of gravity. Of course, the inclination setting will also affect the conveying effect in the left and right directions, so the inclination angle coefficient β will also change accordingly, as shown in the following table:

[0073]

[0074] In S400, the total output power of the stirring structure is P=P 左 +P 右 , and the output power in one direction (i.e. left or right) in the drying kettle is P'=P 左 =P 右=Q'×(ω×L+H) / 367+D×L / 20. Among them, ω is the resistance safety factor, L is the screw length, and H is the conveying height of the material.

[0075] It should be known that in the actual design process, if Figure 6 and Fig.11 As shown, the length L of the screw is actually adapted to the model size of the reactor 6, that is, it is generally a fixed value, ω is the resistance safety factor, which is generally a fixed value, and the material is only transported in the left and right directions, that is, the transport height is generally 0, so the power P still depends on the material transport volume Q', and then the specific parameter design of the stirring structure is particularly important for the design and selection of the entire equipment, thereby ensuring that when designing the horizontal dehydration and drying equipment, the parameters of the stirring structure can be accurately adjusted and optimized according to different material characteristics and production requirements. In this way, accurate control of the material transport volume and speed can be achieved, thereby improving the drying efficiency, reducing energy consumption, and ensuring the uniformity of the material during the drying process. In addition, by reasonably designing the shape and size of the stirring blades, the fluidity of the material can be further improved, the possibility of blockage can be reduced, and the continuous and stable operation of the equipment can be ensured. In practical applications, this design method is not only suitable for specific models of drying kettles, but also has a certain degree of versatility. It can be adjusted and applied according to different models of horizontal dehydration and drying equipment, thereby meeting the diverse industrial production needs.

[0076] In step S400, after calculating the total output power of the stirring structure, when selecting the motor, the rated power of the motor = kp, and k is the safety margin, where 1.2≤k≤2, that is, the corresponding motor model is selected under the consideration of a safety margin of at least 1.2 times the total output power to ensure that the motor will not be damaged due to overload during long-term operation. In practical applications, the specific value of the safety margin k is usually determined based on the frequency of use of the drying kettle 6 and the characteristics of the material. For example, for a drying kettle 6 with a high frequency of use or a material with high viscosity, a higher safety margin will tend to be selected to ensure the stability of the equipment and extend its service life.

[0077] In order to facilitate the understanding of the above design method, the following example is given:

[0078] According to the size of the drying kettle 6 and the actual demand, the total material conveying capacity required is 852m 3 / h, so Q 左 =Q 右 =Q 总 / 2=426m 3 / h, and then the data in the following table are obtained based on the properties of the drying kettle and the material.

[0079]

[0080] We can design the (left-hand) spiral belt as D=1.8, d=1.6, S=7.72, and the (right-hand) spiral belt as D=1, d=0.75, S=12. Then substitute the above data into the formula to get Q 左 ≈426.32m 3 / h,Q 右 ≈426.35m 3 / h. It should be known that the conveying amount in the left and right directions is mainly achieved by changing the parameters of the screw ribbon in the stirring structure, and in actual design, the specific parameters of the screw ribbon need to be adjusted multiple times until the conveying amount in the left and right directions is equal.

[0081] Then calculate the corresponding power according to the transmission amount, and substitute the corresponding value into the corresponding formula to obtain P 左 ≈14.7kW, P 右 ≈14.6kW, then the total power of the stirring structure P=P 左 +P 右 =29.3kW, and the rated power of the selected motor should take into account a safety margin of at least 1.2 times. Assuming k=1.5, 29.3kW×1.5≈45kW, so a motor with a rated power of 45kW can be selected.

[0082] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A horizontal dehydration and drying equipment, characterized in that: include: A drying kettle, a rotating shaft, a first stirring component and a second stirring component, wherein the rotating shaft is horizontally rotatably mounted on the drying kettle and is coaxially arranged with the drying kettle, and the first stirring component and the second stirring component are both mounted on the rotating shaft; when stirring, the first stirring component is suitable for mixing the materials in the drying kettle and conveying them in a first direction, and the second stirring component is suitable for mixing the materials in the drying kettle and conveying them in a second direction, wherein the first direction and the second direction are opposite and are both parallel to the axis of the rotating shaft; The rotating shaft forms a connection with the inner side of the drying kettle, and an air blowing mechanism cooperating with the rotating shaft is installed on the outer side of the drying kettle; when stirring, the air blowing mechanism is suitable for spraying air from the outside of the rotating shaft, and then the air flow is driven by the rotating shaft to form an air curtain, and the air curtain is suitable for isolating the connection from the material; The outside of the rotating shaft is installed with a stirring rod perpendicular to the rotating shaft, the first stirring component includes a first stirring blade, the second stirring component includes a second stirring blade, the first stirring blade and the second stirring blade are both installed outside the stirring rod and are arranged at intervals, the first stirring blade and the second stirring blade are both inclined relative to the axis of the rotating shaft and the inclination directions of the two are opposite; and the first stirring blade and the second stirring blade both adopt a spiral structure to form a spiral belt; A flow channel is provided inside the rotating shaft, and the blowing mechanism includes an air inlet pipe and a sleeve. The sleeve is installed on the outside of the drying kettle and is rotatably sleeved with the rotating shaft. The air inlet pipe is installed outside the sleeve and is connected to the annular cavity in the sleeve. The first end of the flow channel is connected to the annular cavity, and the second end of the flow channel is located outside the rotating shaft and corresponds to the connection, and a one-way valve is provided at the second end of the flow channel.

2. The horizontal dehydration and drying equipment according to claim 1, characterized in that: The bottom of the drying kettle is provided with a plurality of drainage ports for drainage, and a filter element is detachably installed in the drainage port; the drainage port is also suitable for cooperating with an air source, and the air source is suitable for conveying airflow from the drainage port to the bottom of the drying kettle, so that the material boils; The bottom end of the drying kettle is connected and installed with a bushing, the filter element includes a filter cartridge, and the filter cartridge is plugged and installed in the bushing; the filter cartridge includes a mounting portion, an integrally formed cylinder body and a filter screen, the filter screen is located at the top end of the cylinder body, and the mounting portion is arranged at the outer bottom end of the cylinder body; during installation, the cylinder body is suitable for inserting the bushing until the filter screen cooperates with the inner bottom end of the drying kettle, and the mounting portion is detachably connected to the bushing.

3. The design method of the horizontal dehydration and drying equipment according to claim 1 or 2, characterized in that: The steps include: S100: obtaining the conveying volume Q based on the model and size of the drying kettle; S200: Preliminarily determine the basic size of the stirring structure through the calculation formula of the conveying amount Q; S300: The conveying volume Q includes the sum of the material conveying volumes in the two directions in the drying kettle, which are Q 左 and Q 右 , based on Q 左 =Q 右 Then the optimal size of the stirring structure is obtained; S400: Substitute the obtained optimal size into the power calculation formula to obtain the total output power P of the stirring structure, and then select the motor model for driving the stirring structure.

4. The design method of horizontal dehydration and drying equipment according to claim 3, characterized in that: In step S300, the formula for calculating the transport volume in one direction in the drying kettle is: Q'=47×β×σ×ρ×[π×(D 2 -d 2 ) / 4]×S×n×a; Among them, β is the inclination angle coefficient of the drying kettle, σ is the loading coefficient, ρ is the material density, D is the major diameter of the spiral ribbon, d is the minor diameter of the spiral ribbon, S is the pitch of the spiral ribbon, n is the number of revolutions, and a is the continuity coefficient of the material.

5. The design method of horizontal dehydration and drying equipment according to claim 4, characterized in that: The inclination angle range of the drying kettle is 0≤θ≤20°; when θ=0, β=1; when 0<θ≤5, β=0.9; when 5<θ≤10, β=0.8; when 10<θ≤15, β=0.7; when 15<θ≤20, β=0.

65.

6. The design method of horizontal dehydration and drying equipment according to claim 5, characterized in that: In step S400, the total output power P of the stirring structure is P 左 +P 右 , the output power in one direction in the drying kettle is P'=Q'×(ω×L+H) / 367+D×L / 20; Among them, ω is the resistance safety factor, L is the screw length, and H is the conveying height of the material.

7. The design method of the horizontal dehydration and drying equipment according to any one of claims 3 to 6, characterized in that: In step S400, the rated power of the motor=kp, k is a safety margin, wherein 1.2≤k≤2.

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