Esterification reaction kettle for fluorescent whitening agent

Abstract

The utility model relates to a fluorescent whitening agent esterification reaction kettle, which belongs to the technical field of chemical equipment and comprises a kettle body provided with a cavity and a feed port and a discharge port communicated with the cavity. The stirring assembly is arranged on the kettle body and extends into the cavity, the stirring assembly comprises a main stirring shaft and an auxiliary stirring shaft, the rotating axes of the main stirring shaft and the auxiliary stirring shaft are both in the vertical direction, the main stirring shaft is arranged in the center of the cavity, and stirring blades arranged in the vertical direction are arranged on a shaft body of the main stirring shaft; the auxiliary stirring shaft is arranged at the edge position of the cavity, and a spiral blade is arranged on a shaft body of the auxiliary stirring shaft; and the transmission assembly is connected to the main stirring shaft and the auxiliary stirring shaft. The reaction kettle disclosed by the utility model can greatly improve the stirring effect on fluid in the chamber.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a fluorescent whitening agent esterification reaction kettle. Background Art

[0002] Fluorescent whitening agent CBS has excellent resistance to chlorine bleaching, acid and alkali, and sunlight, and is an ideal additive for the textile and daily chemical industries. The traditional production process of fluorescent whitening agent CBS is to use dichlorobenzyl biphenyl, triethyl phosphite and sodium benzaldehyde sulfonate as the main raw materials, and mainly undergo esterification reaction and condensation reaction to obtain the crude fluorescent whitening agent CBS.

[0003] The esterification reaction process in the production process of fluorescent whitening agent CBS is to add biphenyl dichlorobenzyl into a reactor, heat it to melt it, add triethyl phosphite into the reactor loaded with biphenyl dichlorobenzyl, and then heat and reflux to obtain an esterified product.

[0004] The stirring system of the reactor has a very important influence on accelerating the reaction rate between biphenyl dichlorobenzyl and triethyl phosphite and improving the heat transfer efficiency. The existing esterification reactor usually adopts a radial flow stirring method, and the stirring method of the esterification reactor is relatively single, resulting in the working effect of the esterification reactor to be improved. In view of the above-mentioned technology, the inventors invented a new type of fluorescent whitening agent esterification reactor. Utility Model Content

[0005] The purpose of the utility model is to provide a fluorescent whitening agent esterification reaction kettle in view of the deficiencies in the prior art.

[0006] The utility model provides a fluorescent whitening agent esterification reaction kettle, which adopts the following technical scheme:

[0007] include,

[0008] The kettle body is provided with a chamber, and the kettle body is provided with a feed inlet and a discharge outlet communicated with the chamber;

[0009] A stirring assembly is arranged on the kettle body and extends into the chamber, the stirring assembly comprises a main stirring shaft and a secondary stirring shaft, both of which have vertical rotation axes, the main stirring shaft is arranged at the center of the chamber, the main stirring shaft body is provided with stirring blades arranged in the vertical direction, the secondary stirring shaft is arranged at the edge of the chamber, and the secondary stirring shaft body is provided with spiral blades;

[0010] A transmission assembly is connected to the main stirring shaft and the auxiliary stirring shaft.

[0011] Preferably, the transmission assembly includes a ring plate, a connecting plate and a gear, the ring plate is in a circular ring shape, the connecting plate is fixedly connected to the main stirring shaft body, the ring plate is horizontally fixedly connected to the connecting plate, the center line of the ring plate coincides with the center axis of the main stirring shaft, the gear is horizontally fixedly connected to the top of the auxiliary stirring shaft, and the circumferential inner wall of the ring plate is provided with a tooth groove that meshes with the gear.

[0012] Preferably, the bottom end of the auxiliary stirring shaft is rotatably arranged on the bottom wall of the chamber, and the side wall of the chamber is fixedly connected with a positioning plate, and the positioning plate is provided with a positioning hole for the auxiliary stirring shaft to pass through.

[0013] Preferably, the auxiliary stirring shafts are provided in a plurality of groups, and the plurality of groups of auxiliary stirring shafts are arranged in a circular array in the chamber.

[0014] Preferably, a flow guide cover is provided on the side wall of the chamber, and the flow guide cover is provided on the peripheral side of the auxiliary stirring shaft, and flow guide ports are respectively opened on the top and bottom of the flow guide cover.

[0015] Preferably, the kettle body comprises a main body and a kettle cover, the chamber is opened in the main body, and the kettle cover is arranged at the opening of the chamber.

[0016] Preferably, a support platform is provided on the bottom wall of the chamber, and an axis groove for partially embedding the auxiliary stirring shaft is provided on the upper surface of the support platform.

[0017] Preferably, the stirring assembly further comprises a driving motor, the driving motor is arranged at the top of the kettle body, and the output end of the driving motor is fixedly connected to the main stirring shaft.

[0018] In summary, the utility model includes the following beneficial technical effects:

[0019] 1. The stirring assembly in the present application includes a main stirring shaft and an auxiliary stirring shaft. The main stirring shaft drives the auxiliary stirring shaft to move through a transmission assembly, wherein a stirring blade is installed on the shaft wall of the main stirring shaft. Under the action of the main stirring shaft, the fluid flows along the radial direction of the rotation of the main stirring shaft. The shaft body of the auxiliary stirring shaft is provided with spiral blades, so that the fluid located on the peripheral side of the auxiliary stirring shaft flows up and down along the auxiliary stirring shaft. The reactor in the present application includes two stirring modes, which greatly improves the stirring effect on the fluid.

[0020] 2. The transmission assembly includes a ring plate, a connecting plate and a gear, wherein the ring plate is fixedly connected to the shaft wall of the main stirring shaft through the connecting plate, the gear is fixedly connected to the top end of the auxiliary stirring shaft, and a tooth groove meshing with the gear is provided on the circumferential inner side of the ring plate. When the main stirring shaft starts to rotate, the ring plate starts to rotate, and the gear drives the auxiliary stirring shaft to rotate under the action of the tooth groove provided on the circumferential inner side of the ring plate. The main stirring shaft and the auxiliary stirring shaft rotate at the same time and stir the fluid in the kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional structural schematic diagram of a fluorescent whitening agent esterification reaction kettle provided by an embodiment of the utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of the structure of area A in the middle.

[0023] Explanation of the accompanying drawings: 1. kettle body; 11. main body; 111. chamber; 112. discharge port; 113. support platform; 1131. shaft groove; 114. positioning plate; 1141. positioning hole; 115. flow guide cover; 1151. flow guide port; 12. kettle cover; 121. feed port; 2. stirring assembly; 21. main stirring shaft; 211. stirring blade; 22. auxiliary stirring shaft; 221. spiral blade; 23. driving motor; 3. transmission assembly; 31. ring plate; 311. tooth groove; 32. connecting plate; 33. gear. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-2 The utility model is described in further detail.

[0025] The utility model embodiment discloses a fluorescent whitening agent esterification reaction kettle. Figure 1 , including a kettle body 1, a stirring assembly 2 and a transmission assembly 3, the kettle body 1 includes a main body 11 and a kettle cover 12, the main body 11 is provided with a chamber 111, the kettle cover 12 is connected to the top of the main body 11 by bolts, the kettle cover 12 is provided with a feed inlet 121, and the bottom of the main body 11 is provided with a discharge port 112, the feed inlet 121 and the discharge port 112 are both connected to the chamber 111; wherein the stirring assembly 2 includes a driving motor 23, a main stirring shaft 21 and a secondary stirring shaft 22, wherein the main The rotation axes of the stirring shaft 21 and the auxiliary stirring shaft 22 are both in a vertical state. The driving motor 23 is fixedly installed on the top of the kettle cover 12 in a vertical downward direction. The main stirring shaft 21 and the auxiliary stirring shaft 22 both extend into the chamber 111. The output end of the driving motor 23 is fixedly connected to the main stirring shaft 21 and is coaxially arranged. The transmission assembly 3 is connected to the main stirring shaft 21 and the auxiliary stirring shaft 22. The auxiliary stirring shaft 22 is kept consistent with the main stirring shaft 21 under the transmission action of the transmission assembly 3.

[0026] Reference Figure 1 and Figure 2The main stirring shaft 21 is arranged at the center of the chamber 111, and the main stirring shaft 21 is fixedly installed with stirring blades 211 arranged equidistantly in the vertical direction, the auxiliary stirring shaft 22 is arranged at the edge of the chamber 111, and the auxiliary stirring shaft 22 is fixedly installed with spiral blades 221; the auxiliary stirring shaft 22 is provided with multiple groups, and the multiple groups of auxiliary stirring shafts 22 are in a state of a circular array in the chamber 111. The auxiliary stirring shaft 22 in this embodiment is optimally arranged as two groups, and a support platform 113 is welded at the bottom of the chamber 111, and the upper surface of the support platform 113 The surface is provided with an axis groove 1131 for the auxiliary stirring shaft 22 to be partially embedded, and the support platform 113 supports the auxiliary stirring shaft 22. At the same time, a positioning plate 114 is welded to the side wall of the chamber 111, and the positioning plate 114 is provided with a positioning hole 1141 for the auxiliary stirring shaft 22 to pass through. The positioning plate 114 positions the auxiliary stirring shaft 22, so that the auxiliary stirring shaft 22 in the rotating state is more stable. The positioning plate 114 is located close to the top end of the auxiliary stirring shaft 22, that is, the positioning plate 114 will not affect the operation of the spiral blade 221.

[0027] Reference Figure 1 and Figure 2 The transmission assembly 3 includes a ring plate 31, a connecting plate 32 and a gear 33, wherein the ring plate 31 is in a circular ring shape, the connecting plate 32 is welded to the shaft body of the main stirring shaft 21, the ring plate 31 is horizontally fixedly connected to the connecting plate 32, the connecting plate 32 in the present embodiment is in a rod-shaped body, the bottom surface of the connecting plate 32 is connected to the top surface of the ring plate 31, and the center line of the ring plate 31 coincides with the center axis of the main stirring shaft 21, the gear 33 is horizontally fixedly connected to the top of the auxiliary stirring shaft 22, the gear 33 coincides with the center axis of the auxiliary stirring shaft 22, and the circumferential inner wall of the ring plate 31 is provided with a tooth groove 311 meshing with the gear 33, that is, when the main stirring shaft 21 starts to rotate, the main stirring shaft 21 starts to rotate, and the gear 33 drives the auxiliary stirring shaft 22 to rotate under the action of the tooth groove 311 provided on the circumferential inner side of the ring plate 31.

[0028] Reference Figure 1 and Figure 2 A flow guide cover 115 is welded to the side wall of the chamber 111, and the flow guide cover 115 is arranged on the peripheral side of the auxiliary stirring shaft 22, that is, the auxiliary stirring shaft 22 is in a state of being surrounded by the side wall of the chamber 111 and the flow guide cover 115. The flow guide cover 115 plays a role of gathering the fluid in the chamber 111, thereby facilitating the auxiliary stirring shaft 22 to drive the fluid to flow in the axial direction; in this embodiment, two groups of flow guide covers 115 are arranged, and the flow guide covers 115 and the auxiliary stirring shaft 22 are in a one-to-one correspondence. The top and bottom of the flow guide cover 115 are respectively provided with flow guide ports 1151, and the setting of the flow guide ports 1151 enables the fluid in the chamber 111 to flow normally.

[0029] The implementation principle of a fluorescent whitening agent esterification reaction kettle in the utility model embodiment is as follows:

[0030] First, biphenyl dichloride is added into the kettle body 1 through the feed port 121, and after the drive motor 23 is started, triethyl phosphite is added into the kettle body 1 through the feed port 121. The main stirring shaft 21 starts to rotate under the action of the drive motor 23. The shaft wall of the main stirring shaft 21 is equipped with stirring blades 211. Under the action of the main stirring shaft 21, the fluid in the chamber 111 flows along the radial direction of the rotation of the main stirring shaft 21. At this time, the ring plate 31 is in a rotating state, and the gear 33 that is in a meshing relationship with the tooth groove 311 provided on the inner side of the ring plate 31 is in a self-rotating state, so that the auxiliary stirring shaft 22 and the gear 33 are in the same state, and the shaft body of the auxiliary stirring shaft 22 is provided with a spiral blade 221, so that the fluid located on the peripheral side of the auxiliary stirring shaft 22 flows up and down along the auxiliary stirring shaft 22. The reactor in the present application has two-way stirring methods for the fluid, which greatly improves the stirring effect on the fluid.

[0031] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A fluorescent whitening agent esterification reaction kettle, characterized in that: include, The kettle body (1) is provided with a chamber (111), and the kettle body (1) is provided with a feed inlet (121) and a discharge outlet (112) which are in communication with the chamber (111); A stirring assembly (2) is arranged on the kettle body (1) and extends into the chamber (111), the stirring assembly (2) comprising a main stirring shaft (21) and a secondary stirring shaft (22) both of which have rotation axes in vertical directions, the main stirring shaft (21) is arranged at the center of the chamber (111), the main stirring shaft (21) is provided with stirring blades (211) arranged in a vertical direction, the secondary stirring shaft (22) is arranged at the edge of the chamber (111), and the secondary stirring shaft (22) is provided with spiral blades (221); A transmission assembly (3), wherein the transmission assembly (3) is connected to the main stirring shaft (21) and the auxiliary stirring shaft (22).

2. A fluorescent whitening agent esterification reaction kettle according to claim 1, characterized in that: The transmission assembly (3) comprises a ring plate (31), a connecting plate (32) and a gear (33); the ring plate (31) is in a circular ring shape; the connecting plate (32) is fixedly connected to the shaft body of the main stirring shaft (21); the ring plate (31) is horizontally fixedly connected to the connecting plate (32); the center line of the ring plate (31) coincides with the center axis of the main stirring shaft (21); the gear (33) is horizontally fixedly connected to the top of the auxiliary stirring shaft (22); and a tooth groove (311) meshing with the gear (33) is provided on the circumferential inner wall of the ring plate (31).

3. A fluorescent whitening agent esterification reaction kettle according to claim 2, characterized in that: The bottom end of the auxiliary stirring shaft (22) is rotatably arranged on the bottom wall of the chamber (111), and a positioning plate (114) is fixedly connected to the side wall of the chamber (111). The positioning plate (114) is provided with a positioning hole (1141) for the auxiliary stirring shaft (22) to pass through.

4. A fluorescent whitening agent esterification reaction kettle according to claim 1, characterized in that: The auxiliary stirring shafts (22) are provided in a plurality of groups, and the plurality of groups of auxiliary stirring shafts (22) are arranged in a circular array in the chamber (111).

5. A fluorescent whitening agent esterification reaction kettle according to claim 4, characterized in that: The side wall of the chamber (111) is provided with a flow guide cover (115), the flow guide cover (115) is arranged on the peripheral side of the auxiliary stirring shaft (22), and the top and bottom of the flow guide cover (115) are respectively provided with flow guide ports (1151).

6. A fluorescent whitening agent esterification reaction kettle according to claim 5, characterized in that: The kettle body (1) comprises a main body (11) and a kettle cover (12); the chamber (111) is opened in the main body (11), and the kettle cover (12) is arranged at the opening of the chamber (111).

7. A fluorescent whitening agent esterification reaction kettle according to claim 3, characterized in that: The bottom wall of the chamber (111) is provided with a support platform (113), and the upper surface of the support platform (113) is provided with an axis groove (1131) for partially embedding the auxiliary stirring shaft (22).

8. The fluorescent whitening agent esterification reaction kettle according to claim 1, characterized in that: The stirring assembly (2) further comprises a driving motor (23), wherein the driving motor (23) is arranged at the top of the kettle body (1), and the output end of the driving motor (23) is fixedly connected to the main stirring shaft (21).

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