An esterification kettle for producing a fluorescent whitening agent

Abstract

The utility model discloses a kind of esterification stills for producing fluorescent whitening agent, including still body and the still cover of fixed setting in the upper end of the still body, stirring shaft is rotatably arranged in the still body, a plurality of stirring vanes are arranged on the stirring shaft, stirring window is opened on the stirring vane, baffle is slidably arranged in the stirring window, for adjusting the size of the stirring window.In the utility model, the position of baffle in stirring window can be adjusted to adjust the flow area of stirring window, and the flow area of stirring window is different in the rotating process, and the resistance generated by stirring vane is also different, so that the material flow in the still body can be more turbulent in the rotating process, and the mixing effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of esterification reactor technology, and in particular to an esterification reactor for producing fluorescent whitening agents. Background Technology

[0002] Esterification is a type of organic chemical reaction, primarily involving the reaction of alcohols with carboxylic acids or inorganic oxyacids to form esters and water. In the production of fluorescent whitening agents, 4,4'-bis(diethoxyphosphonomethyl)biphenyl is required. This biphenyl is produced by the reaction of 4,4'-dichloromethylbiphenyl with triethyl phosphite under heating conditions, which requires an esterification reactor. During esterification, after the materials are added to the reactor, most reactors currently employ stirring to ensure thorough mixing. However, the stirring blades are mostly fixed and cannot be adjusted, resulting in a limited stirring method. This makes it difficult to match different dosages of materials added to the reactor, thus affecting the degree and speed of mixing. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing an esterification reactor for producing fluorescent whitening agents.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] An esterification reactor for producing fluorescent whitening agents includes a reactor body and a reactor cover fixedly disposed on the upper end of the reactor body. A stirring shaft is rotatably disposed inside the reactor body, and a plurality of stirring blades are disposed on the stirring shaft. A stirring window is opened on the stirring blades, and a baffle is slidably disposed in the stirring window for adjusting the size of the stirring window.

[0006] Preferably, the stirring blade has a slot, the slot is connected to the stirring window, and the baffle is slidably disposed in the slot.

[0007] Preferably, the bottom of the stirring blade is threaded with an adjusting bolt, which abuts against the baffle to drive the baffle to slide.

[0008] Preferably, a connecting rod is fixedly provided on the stirring shaft, and a scraper is provided at the end of the connecting rod away from the stirring shaft, the scraper abutting against the inner wall of the vessel.

[0009] Preferably, a spiral blade is fixedly provided at the lower part of the stirring shaft, and the spiral blade is located below the stirring blade.

[0010] Preferably, a heating chamber is provided on the side wall of the vessel body, and an oil inlet pipe and an oil outlet pipe are connected to the vessel body, and the oil inlet pipe and the oil outlet pipe are connected to the heating chamber.

[0011] Preferably, the side wall of the vessel is provided with a heating tube, which has a spiral structure and is an electric heating tube.

[0012] Preferably, the exterior of the vessel body is provided with a heat insulation layer for heat preservation.

[0013] Preferably, a drive motor is fixedly installed on the vessel lid, and the drive motor is connected to the stirring shaft in a transmission manner.

[0014] Preferably, a support frame is fixedly installed inside the vessel, and the lower end of the stirring shaft is rotatably connected to the support frame.

[0015] The beneficial effects of adopting the above technical solution are as follows:

[0016] 1. In this utility model, each stirring blade is provided with a stirring window. The stirring blade rotates in the vessel under the drive of the stirring shaft, and the material in the vessel can pass through the stirring window. The flow area of ​​the stirring window is adjusted by the sliding baffle so that the flow area of ​​each stirring window is different. Therefore, the resistance generated by each stirring blade during rotation is also different, which makes the material flow in the vessel more disordered, thereby improving the mixing effect.

[0017] 2. In this utility model, a spiral blade is fixedly connected to the lower part of the stirring shaft. When the stirring shaft rotates, it drives the spiral blade to rotate, which can drive the material in the lower part of the vessel to flow upward, avoiding the material from settling at the bottom of the vessel and causing stratification, thereby improving the mixing effect. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 This is a three-dimensional schematic diagram of the stirring blade of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model;

[0021] Figure 4 yes Figure 3 Enlarged view of part A;

[0022] Figure 5 This is a schematic diagram of another embodiment of the present invention;

[0023] Figure 6 yes Figure 5 Enlarged view of part B.

[0024] In the diagram: 1 is the vessel body, 2 is the vessel lid, 3 is the stirring shaft, 4 is the stirring blade, 5 is the stirring window, 6 is the baffle, 7 is the adjusting bolt, 8 is the connecting rod, 9 is the scraper, 10 is the spiral blade, 11 is the heating chamber, 12 is the oil inlet pipe, 13 is the oil outlet pipe, 14 is the drive motor, 15 is the insulation layer, 16 is the support frame, 17 is the heating tube, 18 is the slot, and 19 is the base plate. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] like Figure 1 and Figure 2As shown, an esterification reactor for producing fluorescent whitening agents includes a reactor body 1 and a reactor cover 2 fixedly mounted on the upper end of the reactor body 1. The reactor body 1 and the reactor cover 2 are detachably fixedly connected by bolts. A feed pipe is fixedly mounted on the reactor cover 2, and a valve is provided on the feed pipe to control the opening and closing of the feed pipe. A stirring shaft 3 is rotatably mounted inside the reactor body 1. The stirring shaft 3 is vertically mounted, and multiple sets of stirring blades 4 are arranged from top to bottom on the stirring shaft 3. Stirring windows 5 are opened on both sides of the stirring blades 4, and baffles 6 are slidably mounted inside the stirring windows 5 to adjust the size of the stirring windows 5. In this utility model, the raw materials for synthesizing fluorescent whitening agents are added into the reactor body 1 through the feed pipe. The stirring shaft 3 rotates inside the reactor body 1, driving the stirring blades 4 to rotate inside the reactor body 1, thereby stirring the raw materials in the reactor body 1. By adjusting the position of the baffles 6 inside the stirring windows 5, the flow area of ​​the stirring windows 5 is made different, so the resistance generated by each stirring blade 4 is also different, thereby making the material flow in the reactor body 1 turbulent and improving the mixing effect of the material.

[0029] In another embodiment, a stirring window 5 is provided on the stirring blade 4. No baffle is provided in the stirring window 5. The flow area of ​​the stirring window 5 on each stirring blade 4 is different, which can also play the role of different resistance.

[0030] Furthermore, a slot 18 is provided on the stirring blade 4. The slot 18 is vertically arranged on the stirring blade 4 and is connected to the stirring window 5. The upper end of the slot 18 passes through the upper end of the stirring blade 4, and a base plate 19 is fixedly provided at the lower end of the slot 18. A baffle 6 is vertically slidably arranged in the slot 18. By adjusting the position of the baffle 6 in the slot 18, the flow area of ​​the stirring window 5 can be adjusted.

[0031] Furthermore, such as Figure 2 As shown, an adjusting bolt 7 is threadedly connected to the bottom of the stirring blade 4. The adjusting bolt 7 is threadedly connected to the base plate 19 at the lower end of the slot 18. The upper end of the adjusting bolt 7 abuts against the baffle 6, which is used to drive the baffle 6 to slide. In this embodiment, by rotating the adjusting bolt 7, the adjusting bolt can be raised or lowered in the slot 18, thereby driving the baffle 6 to slide vertically in the slot, and thus adjusting the flow area of ​​the stirring window 5.

[0032] It should be noted that the adjusting bolt 7 is threaded with a locking nut. After the adjusting bolt 7 is rotated to the correct position, the locking nut on the adjusting bolt 7 is rotated so that the locking nut abuts against the lower end of the stirring blade 4, thereby locking the adjusting bolt 7 in place and preventing the adjusting bolt 7 from rotating during the rotation of the stirring blade 4.

[0033] Furthermore, a connecting rod 8 is fixedly mounted on the stirring shaft 3. The connecting rod 8 is horizontally positioned above the stirring blades 4. A scraper 9 is provided at the end of the connecting rod 8 away from the stirring shaft 3, and the scraper 9 abuts against the inner wall of the vessel body 1. In this embodiment, the rotation of the stirring shaft 3 can drive the connecting rod 8 and the scraper 9 to rotate. The scraper 9 scrapes away material from the inner wall of the vessel body 1, preventing material from adhering to the inner wall of the vessel body 1.

[0034] It should be noted that multiple through holes are provided on the scraper 9, allowing the material to flow through the through holes, reducing the resistance of the scraper 9 during rotation, and playing an energy-saving role.

[0035] Furthermore, a spiral blade 10 is fixedly provided at the lower part of the stirring shaft 3, and the spiral blade 10 is located below the stirring blade 4. In this embodiment, when the stirring shaft 3 rotates, it can drive the spiral blade 10 to rotate, thereby enabling the material located at the bottom of the vessel 1 to be transported to the top of the vessel 1, avoiding the material from stratifying in the vessel 1, and further enhancing the mixing effect.

[0036] Furthermore, such as Figure 3 and Figure 4 As shown, a heating chamber 11 is provided on the side wall of the vessel body 1. An oil inlet pipe 12 and an oil outlet pipe 13 are connected to the vessel body 1. The oil inlet pipe 12 and the oil outlet pipe 13 are connected to the heating chamber 11. The oil inlet pipe 12 is used to introduce hot oil into the heating chamber 11. After the heating chamber 11 is filled, the hot oil is discharged from the oil outlet pipe 13, completing the circulation of hot oil. The hot oil can heat the material in the vessel body 1 so that the temperature can reach the reaction temperature of the esterification reaction. The hot oil can heat the material in the vessel body 1 more evenly.

[0037] It should be noted that the oil inlet pipe 12 is located below the vessel body 1, and the oil outlet pipe 13 is located above the vessel body 1. The hot oil enters the heating chamber 11 from the bottom of the vessel body 1 and is then discharged from the oil outlet pipe 13 at the top of the vessel body 1. This can prolong the residence time of the hot oil in the heating chamber 11, thereby improving the heating effect.

[0038] In another embodiment, such as Figure 5 and Figure 6 As shown, a heating tube 17 is provided on the side wall of the vessel body 1. The heating tube 17 has a spiral structure and is an electric heating tube. The heating tube 17 is wound around the outer wall of the vessel body 1 and is in close contact with the outer wall of the vessel body 1. The heating tube 17 can heat the material in the vessel body 1 so that the esterification reaction can reach the reaction temperature.

[0039] Furthermore, the exterior of the vessel body 1 is provided with a heat insulation layer 15 for heat preservation of the vessel body 1. The heat insulation layer 15 covers the outside of the vessel body 1 and is made of rock wool material, which has a good heat preservation effect and prevents heat loss from the vessel body 1.

[0040] It should be noted that when the outer wall of the vessel body 1 is wrapped with heating tubes 17, the insulation layer 15 covers the vessel body 1 and heating tubes 17 to prevent heat loss.

[0041] Furthermore, a drive motor 14 is fixedly installed on the lid 2. The drive motor 14 is connected to the stirring shaft 3, that is, the output shaft of the drive motor 14 is fixedly connected to the upper end of the stirring shaft 3. After the drive motor 14 is started, it can drive the stirring shaft 3 to rotate inside the lid 1.

[0042] It should be noted that, in order to increase the torque of the stirring shaft 3 and make the stirring shaft 3 rotate more smoothly in the material inside the vessel body 1, a reducer is provided between the drive motor 14 and the stirring shaft 3. The reducer is fixedly installed at the upper end of the vessel cover 2. The drive motor 14 is fixedly connected to the reducer, the output shaft of the drive motor 14 is fixedly connected to the input shaft of the reducer, and the output shaft of the reducer is fixedly connected to the upper end of the stirring shaft 3.

[0043] Furthermore, a support frame 16 is fixedly installed inside the vessel body 1. The support frame 16 has a cross-shaped structure and is fixedly connected to the inner wall of the vessel body 1. The connection can be made by welding. The lower end of the stirring shaft 3 is rotatably connected to the middle part of the support frame 16, which makes the stirring shaft 3 more stable during rotation and prevents the stirring shaft 3 from shaking.

[0044] Furthermore, a discharge pipe is fixedly installed at the bottom of the vessel body 1, and a valve is installed on the discharge pipe to control the opening and closing of the discharge pipe. The bottom of the vessel body 1 adopts an arc-shaped structure, and the discharge pipe is located at the lowest point of the bottom of the vessel body 1, which can completely discharge the material in the vessel body 1 and reduce the material residue in the vessel body 1.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An esterification reactor for producing fluorescent whitening agents, characterized in that, It includes a vessel body (1) and a vessel cover (2) fixedly installed on the upper end of the vessel body (1). A stirring shaft (3) is rotatably installed inside the vessel body (1). Multiple stirring blades (4) are installed on the stirring shaft (3). A stirring window (5) is opened on the stirring blade (4). A baffle (6) is slidably installed inside the stirring window (5) for adjusting the size of the stirring window (5).

2. The esterification reactor for producing fluorescent whitening agents according to claim 1, characterized in that, The stirring blade (4) has a slot, which is connected to the stirring window (5), and the baffle (6) is slidably disposed in the slot.

3. The esterification reactor for producing fluorescent whitening agents according to claim 2, characterized in that, The bottom of the stirring blade (4) is threaded with an adjusting bolt (7), which abuts against the baffle (6) to drive the baffle (6) to slide.

4. The esterification reactor for producing fluorescent whitening agents according to claim 1, characterized in that, A connecting rod (8) is fixedly installed on the stirring shaft (3). A scraper (9) is provided at one end of the connecting rod (8) away from the stirring shaft (3). The scraper (9) abuts against the inner wall of the vessel body (1).

5. The esterification reactor for producing fluorescent whitening agents according to claim 1, characterized in that, A spiral blade (10) is fixedly installed at the lower part of the stirring shaft (3), and the spiral blade (10) is located below the stirring blade (4).

6. The esterification reactor for producing fluorescent whitening agents according to claim 1, characterized in that, The side wall of the vessel body (1) is provided with a heating chamber (11). An oil inlet pipe (12) and an oil outlet pipe (13) are connected to the vessel body (1). The oil inlet pipe (12) and the oil outlet pipe (13) are connected to the heating chamber (11).

7. The esterification reactor for producing fluorescent whitening agents according to claim 1, characterized in that, The side wall of the vessel body (1) is provided with a heating tube (17), which has a spiral structure and is an electric heating tube.

8. The esterification reactor for producing fluorescent whitening agents according to claim 1, characterized in that, The vessel body (1) is provided with an insulation layer (15) on the outside for heat preservation of the vessel body (1).

9. The esterification reactor for producing fluorescent whitening agents according to claim 1, characterized in that, A drive motor (14) is fixedly installed on the lid (2), and the drive motor (14) is connected to the stirring shaft (3) for transmission.

10. An esterification reactor for producing fluorescent whitening agents according to claim 1, characterized in that, A support frame (16) is fixedly installed inside the vessel body (1), and the lower end of the stirring shaft (3) is rotatably connected to the support frame (16).

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