Anchor stirrer for production of dimethyl biphenyl ether

Abstract

The utility model relates to an anchor agitator for producing diphenyl dimethyl ether, comprising an agitator shaft, an anchor paddle arranged on the agitator shaft, the anchor paddle comprising a lower mounting sleeve fixedly arranged on the agitator shaft, and 2-4 L-shaped paddles uniformly arranged on the lower mounting sleeve along the circumference, the L-shaped paddles being formed by bending a steel plate, the steel plate comprising a first side plate arranged obliquely. The utility model solves the defect of uneven crystal size caused by poor mass transfer efficiency when the anchor agitator stirs at a low speed after crystallization begins.

Description

Technical Field

[0001] The utility model relates to a stirrer, in particular to an anchor stirrer used for producing diphenyl dimethyl ether. Background Art

[0002] Dimethyl biphenyl ether is a white crystal. The process usually used in the crystallization process is to first heat it in a solvent to form a supersaturated solution, and then cool it to crystallize and precipitate the crystals. In the cooling crystallization process, the agitator currently used is usually an anchor agitator, which consists of two L-shaped agitators arranged on the radial line of the anchor paddle motion trajectory. When in use, the outer edge of the L-shaped agitator abuts against the inner wall of the crystallization tank to facilitate scraping off the crystals adhered to the tank wall. However, it still has the following disadvantages: 1) When crystallization begins to occur, if a lower stirring rate is used, as the number of crystals increases, its mass transfer efficiency will deteriorate, thereby making the cooling rate of each part different, which not only affects the crystallization, but also causes the crystals to be of different sizes; 2) When crystallization begins to occur, if a higher stirring rate is used, although the mass transfer efficiency can be improved and the problem of different crystal sizes can be solved, it will cause the crystals to be generally small. Therefore, an anchor agitator for the production of dimethyl biphenyl ether is developed to improve its mass transfer efficiency at a lower stirring rate and solve the problem of uneven crystal size caused by poor mass transfer efficiency after crystallization occurs during low-speed stirring. Utility Model Content

[0003] The utility model aims to overcome the defect in the prior art that after crystallization begins, low-speed stirring of an anchor agitator will lead to uneven crystal size due to poor mass transfer efficiency, and provides an anchor agitator for the production of diphenyl dimethyl ether.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] An anchor agitator for producing dimethyl biphenyl ether comprises a stirring shaft and an anchor paddle arranged on the stirring shaft, wherein the anchor paddle comprises a lower mounting sleeve fixedly arranged on the stirring shaft, and 2-4 L-shaped paddle blades uniformly arranged on the lower mounting sleeve along the circumference, wherein the L-shaped paddle blades are formed by bending a steel plate, and the steel plate comprises a first side plate arranged obliquely.

[0006] As a further technical solution, the angle between the vertical portion of the first side plate and the radial line of the anchor paddle's motion trajectory is 40-70 degrees.

[0007] As a further technical solution, the steel plate also includes a connecting plate and a second side plate arranged at an angle, and the second side plate and the first side plate are symmetrically arranged on both sides of the connecting plate, so that the first side plate, the connecting plate and the second side plate are trapezoidal as a whole, and the trapezoid is narrow on the side close to the stirring shaft and wide on the side away from the stirring shaft.

[0008] As a further technical solution, a plurality of micro holes are provided on the connecting plate and the second side plate.

[0009] As a further technical solution, the pore size of the micropores is 1-20 microns.

[0010] As a further technical solution, a notch is formed at one end of the second side plate close to the stirring shaft.

[0011] As a further technical solution, the anchor paddle also includes an upper mounting sleeve fixedly disposed on the agitator shaft, and a cross bar disposed on the upper mounting sleeve, the number of the cross bars being equal to the number of the L-shaped blades, one end of the cross bar being disposed on the upper mounting sleeve, and the other end being disposed on the corresponding L-shaped blade.

[0012] As a further technical solution, an inclined mounting plate is provided on the cross bar, and the mounting plate is connected to the first side plate by bolts.

[0013] As a further technical solution, a circular hole and a strip hole are respectively arranged on the mounting plate and the first side plate, and the bolt comprises a screw rod and a nut, and one end of the screw rod passes through the circular hole and the strip hole and is threadedly connected with the nut.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1) The utility model breaks with the traditional technology that the first side plate of the L-shaped paddle coincides with the radial line of the motion trajectory of the anchor paddle, and sets the first side plate inclined to the radial line of the motion trajectory of the anchor paddle. The first side plate has a wider actual width under the same projection width, and is made of steel with good heat conduction. Therefore, the mass transfer rate of the anchor agitator paddle is improved, and the problem of increased crystals and reduced mass transfer efficiency of the solution after crystallization occurs is solved.

[0016] 2) The utility model further provides a second side plate and a connecting plate and micropores are provided on the second side plate and the connecting plate, so that when in use, the first side plate, the connecting plate, the second side plate and the inner wall of the crystallization tank can enclose an L-shaped channel, and the second side plate can be provided to keep large crystals out alone, and the micropores can allow the solvent to enter the L-shaped channel, thereby accelerating the mass transfer of the inner and outer solvents, improving the mass transfer efficiency, and solving the problem of the deterioration of the solvent mass transfer efficiency due to the increase of crystals after crystallization.

[0017] 3) The utility model provides a notch on the second side plate to facilitate the discharge of crystals precipitated in the L-shaped blade outside the L-shaped blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of an embodiment of the utility model;

[0020] Figure 3 for Figure 2 Cross-sectional view along AA direction;

[0021] Figure 4 for Figure 3 A magnified view of point B;

[0022] In the figure, 1. stirring shaft, 2. anchor paddle, 3. lower mounting sleeve, 4. L-shaped paddle, 5. first side plate, 6. motion trajectory of anchor paddle, 7. radial line, 8. second side plate, 9. connecting plate, 10. micropore, 11. notch, 12. upper mounting sleeve, 13. cross bar, 14. mounting plate, 15. strip hole, 16. screw, 17. nut. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solution of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The present invention will be described in further detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figure 1-4 The utility model shows an embodiment of an anchor agitator for the production of dimethyl biphenyl ether, comprising an agitator shaft 1, an anchor paddle 2 arranged on the agitator shaft 1, the anchor paddle 2 comprising a lower mounting sleeve 3 fixedly arranged on the agitator shaft 1, and 2-4 L-shaped paddle blades 4 uniformly arranged on the lower mounting sleeve 3 along the circumference, the L-shaped paddle blades being formed by bending a steel plate, the steel plate comprising an inclined first side plate 5. The utility model breaks the setting mode in the traditional technology of coinciding the first side plate 5 of the L-shaped paddle with the radial line 7 of the motion trajectory 6 of the anchor paddle, and sets the first side plate 5 inclined to the radial line 7 of the motion trajectory 6 of the anchor paddle. The first side plate 5 has a wider actual width under the same projection width, and is made of steel material with good heat conduction, thereby improving the mass transfer rate of the anchor agitator paddle, and solving the problem of reduced mass transfer efficiency of the solution due to an increase in crystals after crystallization occurs.

[0029] As an embodiment of the anchor agitator for producing dimethyl biphenyl ether of the utility model, the angle between the vertical portion of the first side plate 5 and the radial line 7 of the anchor paddle motion trajectory 6 is 40-70 degrees.

[0030] As an embodiment of the utility model of an anchor agitator for the production of dimethyl biphenyl ether, the steel plate also includes a connecting plate 9 and an inclined second side plate 8, and the second side plate 8 and the first side plate 5 are symmetrically arranged on both sides of the connecting plate 9, so that the first side plate 5, the connecting plate 9 and the second side plate 8 are trapezoidal as a whole, and the trapezoid is narrow on the side close to the stirring shaft 1 and wide on the side away from the stirring shaft 1; the utility model also arranges a second side plate 8 and a connecting plate 9 and arranges micropores 10 on the second side plate 8 and the connecting plate 9, so that when in use, the first side plate 5, the connecting plate 9, the second side plate 8 and the inner wall of the crystallization tank can be enclosed into an L-shaped channel, and the arrangement of the second side plate 8 can keep large crystals out alone, and the arrangement of the micropores 10 can allow the solvent to enter the L-shaped channel, thereby accelerating the mass transfer of the inner and outer solvents, improving the mass transfer efficiency, and solving the problem of the deterioration of the solvent mass transfer efficiency due to the increase of crystals after crystallization.

[0031] As an embodiment of the anchor stirrer for producing diphenyl dimethyl ether of the utility model, the connecting plate 9 and the second side plate are provided with a plurality of micro holes 10;

[0032] As an embodiment of the anchor stirrer for producing dimethyl biphenyl ether of the utility model, the pore diameter of the micropores 10 is 1-20 microns.

[0033] As an embodiment of an anchor stirrer for producing diphenyl dimethyl ether of the utility model, the second side plate 8 has a notch 11 at one end close to the stirring shaft 1. The utility model provides the notch 11 on the second side plate 8 to facilitate the discharge of crystals precipitated in the L-shaped blade out of the L-shaped blade.

[0034] As an embodiment of the utility model, an anchor agitator for the production of dimethyl biphenyl ether, the anchor paddle 2 also includes an upper mounting sleeve 12 fixedly arranged on the agitator shaft 1, and a cross bar 13 arranged on the upper mounting sleeve 12, the number of the cross bars 13 is equal to the number of the L-shaped blades 4, one end of the cross bar 13 is arranged on the upper mounting sleeve 12, and the other end is arranged on the corresponding L-shaped blade 4.

[0035] As an embodiment of the anchor agitator for producing dimethyl biphenyl ether of the utility model, an inclined mounting plate 14 is arranged on the cross bar 13, and the mounting plate 14 is connected to the first side plate 5 by bolts.

[0036] As an embodiment of the utility model of an anchor agitator for the production of dimethyl biphenyl ether, a circular hole and a strip hole 15 are respectively arranged on the mounting plate 14 and the first side plate 5, and the bolt includes a screw rod 16 and a nut 17, and one end of the screw rod 16 passes through the circular hole and the strip hole 15 and is threadedly connected with the nut 17.

[0037] The assembly method of the utility model is to first sleeve the upper and lower mounting sleeves 3 on the stirring shaft 1 respectively, then rotate the upper mounting sleeve 12 to make the mounting plate 14 abut against the first side plate 5, and then bolt the two together, and then fix the upper mounting sleeve 12 and the lower mounting sleeve 3 to the stirring shaft 1 respectively.

[0038] Technical effects of the utility model:

[0039] The anchor agitator of the utility model and the traditional anchor agitator (both are provided with a cross bar 13, and the projection width of the first side plate 5 of the utility model on the radial line 7 of the motion trajectory is the same as that of the traditional anchor agitator) are installed in a crystallization tank to perform crystallization operation. During the crystallization process, the stirring rate and other operations are completely consistent. The size of the diphenyl dimethyl ether crystals prepared by the utility model is in the range of 60-100 microns; while the size of the diphenyl dimethyl ether crystals produced by the traditional anchor agitator is in the range of 10-100 microns. When the stirring speed is increased, the size of the diphenyl dimethyl ether crystals produced by the traditional anchor agitator is in the range of 1-50 microns.

[0040] The above-mentioned embodiments are only preferred embodiments of the present invention, and are not exhaustive of the feasible implementations of the present invention. For those skilled in the art, any obvious changes made to the present invention without departing from the principle and spirit of the present invention should be considered to be included in the scope of protection of the claims of the present invention.

Claims

1. An anchor stirrer for producing dimethyl biphenyl ether, characterized in that: The invention comprises an agitator shaft (1), an anchor-type paddle (2) arranged on the agitator shaft (1), the anchor-type paddle (2) comprising a lower mounting sleeve (3) fixedly arranged on the agitator shaft (1), and 2 to 4 L-shaped paddle blades (4) uniformly arranged on the lower mounting sleeve (3) along the circumference, the L-shaped paddle blades being formed by bending a steel plate, and the steel plate comprising a first side plate (5) arranged obliquely.

2. An anchor stirrer for producing dimethyl biphenyl ether according to claim 1, characterized in that: The angle between the vertical portion of the first side plate (5) and the radial line (7) of the anchor paddle motion track (6) is 40-70 degrees.

3. An anchor agitator for producing dimethyl biphenyl ether according to claim 1, characterized in that: The steel plate further comprises a connecting plate (9) and a second side plate (8) which is arranged obliquely, wherein the second side plate (8) and the first side plate (5) are symmetrically arranged on both sides of the connecting plate (9), so that the first side plate (5), the connecting plate (9) and the second side plate (8) are trapezoidal in shape as a whole, wherein the side of the trapezoid close to the stirring shaft (1) is narrow and the side away from the stirring shaft (1) is wide.

4. An anchor stirrer for producing dimethyl biphenyl ether according to claim 3, characterized in that: The connecting plate (9) and the second side plate are provided with a plurality of micro holes (10).

5. An anchor stirrer for producing dimethyl biphenyl ether according to claim 4, characterized in that: The pore size of the micropore (10) is 1-20 micrometers.

6. An anchor stirrer for producing dimethyl biphenyl ether according to claim 3, characterized in that: The second side plate (8) is provided with a notch (11) at one end close to the stirring shaft (1).

7. An anchor agitator for producing dimethyl biphenyl ether according to claim 1, characterized in that: The anchor-type paddle (2) further comprises an upper mounting sleeve (12) fixedly mounted on the stirring shaft (1), and a cross bar (13) mounted on the upper mounting sleeve (12), wherein the number of the cross bars (13) is equal to the number of the L-shaped paddles (4), and one end of the cross bar (13) is mounted on the upper mounting sleeve (12), and the other end is mounted on the corresponding L-shaped paddle (4).

8. An anchor agitator for producing dimethyl biphenyl ether according to claim 7, characterized in that: The cross bar (13) is provided with an inclined mounting plate (14), and the mounting plate (14) is connected to the first side plate (5) by bolts.

9. An anchor stirrer for producing dimethyl biphenyl ether according to claim 8, characterized in that: A circular hole and a strip hole (15) are respectively provided on the mounting plate (14) and the first side plate (5); the bolt comprises a screw rod (16) and a nut (17); one end of the screw rod (16) passes through the circular hole and the strip hole (15) and is threadedly connected with the nut (17).

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