CN221693615U - A continuous production device for 3,3-diaminodiphenyl sulfone - Google Patents

Abstract

The utility model provides a continuous production device of 3, 3-diaminodiphenyl sulfone, including first raw materials buffer tank, second raw materials liquid buffer tank and reaction ejection of compact cauldron, the inside vertical baffle that is provided with of reaction ejection of compact cauldron separates reaction ejection of compact cauldron into reaction zone and ejection of compact district, two district bottoms intercommunication are provided with first agitator and second agitator respectively in two districts, the stirring flabellum slope opposite direction on two agitators, and two agitators stirring opposite direction, first raw materials buffer tank, second raw materials liquid buffer tank are connected with the feed inlet on the reaction zone through the conveying pipeline respectively, be provided with first delivery pump and second delivery pump on two conveying pipelines respectively, be provided with the feeding valve on the pipeline that two delivery pumps are connected with two buffer tanks respectively, be provided with the overflow discharge gate on the discharge zone upper end lateral wall. The material baffle is additionally arranged in the reaction kettle, the reaction kettle is divided into a reaction zone and a discharge zone, and the two zones are provided with stirrers with different stirring directions, so that the system is uniformly stirred and mixed before discharging, and uniform discharging is ensured.

Description

A continuous production device for 3,3-diaminodiphenyl sulfone

Technical Field

The utility model relates to a continuous production device for 3,3-diaminodiphenyl sulfone, belonging to the technical field of chemical equipment.

Background Art

At present, the conventional production process of 3,3-diaminodiphenyl sulfone is a single-pot stirring reaction. After the reaction is completed, the reaction system in the reactor is removed and filtered to obtain the final product 3,3-diaminodiphenyl sulfone. Intermittent reaction affects the reaction efficiency. Continuous reaction overflow discharge solves the shortcomings of intermittent reaction. However, the reaction still adopts a single-pot reaction, but only adds an overflow port. It is found during the reaction that the sedimentation effect of 3,3-diaminodiphenyl sulfone is obvious after it is generated, and it gathers at the bottom of the reactor. It is impossible to achieve uniform discharge during overflow discharge, which brings trouble to subsequent solid-liquid separation.

Utility Model Content

The utility model provides a continuous production device for 3,3-diaminodiphenyl sulfone to overcome the drawbacks of the prior art. A material partition is added in a reaction kettle to separate the reaction kettle into a reaction zone and a discharging zone. Stirring paddles with different stirring directions are arranged in the two zones to stir and mix the system before discharging to ensure uniform discharging.

The technical solution adopted by the utility model to solve its technical problems is:

A continuous production device for 3,3-diaminodiphenyl sulfone, comprising a first raw material buffer tank, a second raw material liquid buffer tank and a reaction discharge kettle, wherein a partition is vertically arranged inside the reaction discharge kettle to separate the reaction discharge kettle into a reaction zone and a discharge zone, the two zones are connected at the bottom, a first agitator and a second agitator are respectively arranged in the reaction zone and the discharge zone, the stirring blades on the two agitators are inclined in opposite directions, and the two agitators stir in opposite directions, the first raw material buffer tank and the second raw material liquid buffer tank are respectively connected to a feed port on the reaction zone through a feed pipe, the two feed pipes are respectively provided with a first delivery pump and a second delivery pump, the pipelines connecting the two delivery pumps and the two buffer tanks are respectively provided with feeding valves, and an overflow discharge port is provided on the upper side wall of the discharge zone.

In the above-mentioned continuous production device of 3,3-diaminodiphenyl sulfone, a plurality of groups of stirring blades are arranged on the stirring rods of the first agitator and the second agitator from top to bottom at intervals, and each group of stirring blades on the first agitator has the same inclination direction and is arranged to be tilted downward from left to right; each group of stirring blades on the second agitator has the same inclination direction and is arranged to be tilted upward from left to right.

In the above-mentioned continuous production device of 3,3-diaminodiphenyl sulfone, a wedge-shaped plate is further arranged on the bottom surface of the reaction and discharge kettle, and the wedge-shaped plate is inclined downward from the reaction zone to the discharge zone.

In the above-mentioned continuous production device of 3,3-diaminodiphenyl sulfone, a perforated baffle is arranged at the front end of the overflow discharge port, the perforated baffle is vertically fixed on the side wall of the discharge area, and the aperture of the holes on the perforated baffle is larger than the particle size of the product.

The above-mentioned continuous production device of 3,3-diaminodiphenyl sulfone also includes a static mixer, the discharge ports of the first delivery pump and the second delivery pump are connected to the static mixer through pipelines, and the static mixer is connected to the feed port of the reaction zone through a feed pipeline, and a feed valve is provided on the feed pipeline.

In the above-mentioned continuous production device of 3,3-diaminodiphenyl sulfone, the outer wall of the reaction discharge kettle is provided with steam heating and condensate cooling coils, the overflow discharge port is provided on the wall of the reaction discharge kettle above the steam heating and condensate cooling coils, and a discharge valve is provided on the discharge pipe connected to the overflow discharge port.

The beneficial effects of the utility model are as follows: a partition is arranged inside the reaction discharging kettle of the utility model, which separates the reaction discharging kettle into a reaction zone and a discharging zone, so that the reaction and discharging are carried out separately, and the discharging zone is stirred separately to avoid material sedimentation, ensure the uniformity of the discharging, and do not affect the reaction in the reaction zone, solving the problem of uneven discharging caused by serious material sedimentation in one reaction kettle. A wedge-shaped plate is arranged at the bottom of the reaction discharging kettle, which is conducive to the transfer of materials from the reaction zone to the discharging zone; a baffle with holes is arranged in front of the overflow port, so that the liquid level fluctuation caused by mechanical stirring is offset when the material overflows and discharges, ensuring stable discharging.

BRIEF DESCRIPTION OF THE DRAWINGS

The utility model will be further described below in conjunction with the accompanying drawings.

Figure 1 is a schematic diagram of the overall structure of the utility model;

Figure 2 is a schematic diagram of a group of stirring blades in the discharge area.

In the figure: 1. First raw material buffer tank; 2. Second raw material liquid buffer tank; 3. Reaction discharge kettle; 3-1. Reaction zone; 3-2. Discharge zone; 3-3. First agitator; 3-4. Second agitator; 3-5. Wedge plate; 3-6. Baffle plate with holes; 4. Partition; 5. First delivery pump; 6. Second delivery pump; 7. Overflow discharge port; 8. Static mixer; 9. Feed valve; 10. Steam heating and condensate cooling coil; 11. Discharge valve.

DETAILED DESCRIPTION

The utility model will be further described below in conjunction with the accompanying drawings.

Referring to Figures 1 and 2, the continuous production device of 3,3-diaminodiphenyl sulfone of the utility model comprises a first raw material buffer tank 1, a second raw material liquid buffer tank 2 and a reaction discharge kettle 3, wherein the sodium disulfide solution and the 3,3-dinitrodiphenyl sulfone suspension are respectively contained in the first raw material buffer tank and the second raw material buffer tank, and a partition plate 4 is vertically arranged inside the reaction discharge kettle 3 to separate the reaction discharge kettle into a reaction zone 3-1 and a discharge zone 3-2, and the bottoms of the two zones are connected, and the reaction zone 3-1 and the discharge zone 3-2 are respectively provided with a first A stirrer 3-3 and a second stirrer 3-4, the stirring blades on the two stirrers are tilted in opposite directions, and the stirring directions of the two stirrers are opposite. Specifically: a plurality of groups of stirring blades are arranged on the stirring rods of the first stirrer and the second stirrer from top to bottom, for example, three groups of stirring blades are arranged at intervals, and each group is circumferentially arranged with three blades. The first stirrer in the reaction zone stirs clockwise, and each group of stirring blades on the first stirrer has the same tilt direction, and the blades are tilted downward from left to right, so that the material is pressed down to the bottom of the kettle during stirring. The stirrer in the discharge zone stirs counterclockwise, and each group of stirring blades on the second stirrer has the same tilt direction, and the blades are tilted downward from right to left, so that the material is turned up during stirring. The first raw material buffer tank 1 and the second raw material liquid buffer tank 2 are respectively connected to the static mixer 8 through a feed pipe, and the two feed pipes are respectively provided with a first delivery pump 5 and a second delivery pump 6. The liquid outlet of the static mixer 8 is connected to the feed port on the reaction zone 3-1 through a feed pipe, and a feed pipe connecting the static mixer and the reaction zone is provided with a feed pipe. Valve 9 controls the retention time of the material in the kettle by controlling the pumping speed of the two delivery pumps, ensuring that the material has enough reaction time in the reaction kettle. An overflow discharge port 7 is arranged on the upper side wall of the discharge zone 3-2, and a perforated baffle 3-6 is arranged at the front end of the overflow discharge port 7. The perforated baffle 3-6 is vertically fixed on the side wall of the discharge zone 3-2. The aperture of the hole on the perforated baffle 3-6 is larger than the particle size of the product, so that the material can offset the liquid level fluctuation caused by mechanical stirring during overflow discharge, thereby ensuring stable discharge.

A wedge plate 3-5 is also provided on the bottom surface of the reaction and discharge kettle 3, and the wedge plate 3-5 is inclined downward from the reaction zone 3-1 to the discharge zone 3-2, which is conducive to the transfer of materials from the reaction zone to the discharge zone. A steam heating and condensate cooling coil 10 is provided on the outer wall of the reaction and discharge kettle 3, and steam or condensate is introduced into the coil to control the temperature of the reaction system. The overflow discharge port 7 is provided on the wall of the reaction and discharge kettle 3 above the steam heating and condensate cooling coil 10, and a discharge valve 11 is provided on the discharge pipe connected to the overflow discharge port 7.

Working process: when feeding, open the feeding valve on the pipeline connecting the two delivery pumps and the two buffer tanks, and turn on the two delivery pumps (set the pumping speed of the delivery pumps in advance), so that the sodium disulfide solution and 3,3-dinitrodiphenyl sulfone suspension in the first raw material buffer tank and the second raw material buffer tank are fully mixed in the static mixer, and then open the feeding valve to transport the mixed material to the reaction zone of the reaction discharge kettle, and turn on the first agitator 3-3 and the second agitator 3-4 at the same time. The material entering the reaction zone is pressed downward to the bottom of the kettle under the stirring of the first agitator while reacting, and gradually enters the discharge zone at the bottom of the partition, and is turned up by the second agitator. After the system is stable, it reaches the overflow discharge port height, and the discharge valve is opened, and the flow adjustment of the regulating pump is coordinated to achieve continuous and uniform discharge of the product.

Claims (6)

1. A continuous production device of 3, 3-diamino diphenyl sulfone, which is characterized in that: the device comprises a first raw material buffer tank (1), a second raw material liquid buffer tank (2) and a reaction discharging kettle (3), wherein a baffle plate (4) is vertically arranged inside the reaction discharging kettle (3), the reaction discharging kettle is divided into a reaction zone (3-1) and a discharging zone (3-2), the bottoms of the two zones are communicated, a first stirrer (3-3) and a second stirrer (3-4) are respectively arranged in the reaction zone (3-1) and the discharging zone (3-2), the inclination directions of stirring blades on the two stirrers are opposite, the stirring directions of the two stirrers are opposite, the first raw material buffer tank (1) and the second raw material liquid buffer tank (2) are respectively connected with a feed inlet on the reaction zone (3-1) through a feed conveying pipeline, a first conveying pump (5) and a second conveying pump (6) are respectively arranged on two conveying pipelines connected with the two buffer tanks, and an overflow port (7) is arranged on the upper end side wall of the discharging zone (3-2).

2. The continuous production apparatus for 3, 3-diaminodiphenyl sulfone according to claim 1, characterized in that: a plurality of groups of stirring paddles are respectively arranged on stirring rods of the first stirrer (3-3) and the second stirrer (3-4) at intervals from top to bottom, and each group of stirring paddles on the first stirrer (3-3) are in the same inclination direction and are obliquely arranged from left to right and downwards; and each group of stirring blades on the second stirrer (3-4) are inclined in the same direction, and are obliquely arranged from left to right.

3. The continuous production apparatus for 3, 3-diaminodiphenyl sulfone according to claim 1, characterized in that: the bottom surface in the reaction discharging kettle (3) is also provided with a wedge-shaped plate (3-5), and the wedge-shaped plate (3-5) is inclined downwards from the reaction zone (3-1) to the discharging zone (3-2).

4. The continuous production apparatus for 3, 3-diaminodiphenyl sulfone according to claim 1, characterized in that: the front end of the overflow discharging hole (7) is provided with a perforated baffle plate (3-6), the perforated baffle plate (3-6) is vertically fixed on the side wall of the discharging area (3-2), and the aperture of the hole on the perforated baffle plate (3-6) is larger than the grain diameter of the product.

5. The continuous production apparatus for 3, 3-diaminodiphenyl sulfone according to claim 1, characterized in that: the device also comprises a static mixer (8), wherein the discharge ports of the first conveying pump (5) and the second conveying pump (6) are connected with the static mixer (8) through pipelines, the static mixer (8) is connected with the feed port of the reaction zone (3-1) through a feed pipeline, and a feed valve (9) is arranged on the feed pipeline.

6. The continuous production apparatus for 3, 3-diaminodiphenyl sulfone according to claim 1, characterized in that: the steam heating and condensate cooling coil pipe (10) is arranged on the outer wall of the reaction discharging kettle (3), the overflow discharging port (7) is arranged on the kettle wall of the reaction discharging kettle (3) above the steam heating and condensate cooling coil pipe (10), and the discharging pipe connected with the overflow discharging port (7) is provided with a discharging valve (11).