A discharging device for polymerizing reactor used in chemical production

Abstract

A discharging device for a polymerization kettle for chemical production comprises a polymerization kettle, a discharging port at the bottom of the polymerization kettle is provided with a horizontally arranged spiral discharging machine, the spiral discharging machine is connected to the discharging device, the discharging device comprises a discharging box and an extrusion block, and the discharging box is provided with a storage cavity with an open top. The present invention belongs to the technical field of chemical equipment, and provides a discharging device for a polymerization kettle for chemical production. Compared with the existing discharging device for a polymerization kettle, the discharging device can quickly transport materials to the storage cavity of the discharging box, thereby avoiding long-term discharging blockage of the discharging pipe of the polymerization kettle, the discharging speed of the discharging box can be accurately controlled, the air and bubbles contained in the materials can be quickly collected, the material temperature at the discharging port can be stably controlled during discharging, and the air around the discharging port can be quickly collected and processed to avoid odor diffusion and pollution.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical production equipment, and in particular relates to a polymerizer discharging device for chemical production. Background Art

[0002] The polymerization kettle is generally a vertical cylindrical autoclave with a jacket so that steam or cold water can be passed in for heating or cooling. The kettle is usually equipped with an agitator, which is driven by an electric motor through a transmission device and a reducer to ensure that the reactants can be evenly mixed. The outer wall of the kettle is usually made of carbon steel, lined with a stainless steel pipe (other non-ferrous metals can also be used according to customer process requirements), and there are also enamel lined ones. In addition, the polymerization kettle is also equipped with accessories such as safety valves, thermometers, pressure gauges, inlets and outlets to ensure the safety and smooth progress of the reaction process. The working principle of the polymerization kettle is based on the chemical process of the polymerization reaction. Before the reaction starts, the required reactants, catalysts, solvents, etc. are added to the inner tank and evenly mixed by a stirring device. Next, according to the reaction requirements, the outer tank is heated to provide the required temperature conditions. In a higher pressure environment, it is usually carried out through a sealing system to keep the reaction process stable. During the reaction process, it is necessary to monitor the changes in temperature and pressure, and adjust the power and stirring speed of the heater in time to ensure that the reaction is carried out under suitable conditions.

[0003] After the polymerization reaction is completed in the polymerization kettle, the discharging process begins. The existing polymerization kettle mainly relies on the discharging pump at the discharging port to discharge the materials. Due to the different types of materials, the materials may be viscous with a small flow rate or sparse with a large flow rate. The discharging pump cannot accurately control the discharging speed, and the discharging may be too fast or too slow. Since chemical raw materials are generally viscous after heating, the discharging port of the polymerization kettle will cause the materials to stick to the discharging port when discharging for a long time, causing the discharging port to be blocked.

[0004] Patent announcement number CN 221015929 U discloses a polyethylene polymerization kettle discharge device, wherein the bottom of the processing tank is fixedly connected with a discharge pipe, the outer surface of the bottom of the processing tank is fixedly installed with an insulation pipe, and the discharge pipe penetrates and is fixedly installed inside the insulation pipe, the top surface of the discharge pipe is fixedly installed with a control valve, the outer surface of the bottom of the insulation pipe is fixedly installed with a limit plate, and the limit plate is located at the bottom of the sliding sleeve; the outer surface of the insulation pipe is slidably sleeved with a sliding sleeve, the outer surface of the sliding sleeve is fixedly installed with a connecting block, the outer surface of the connecting block is rotatably sleeved with a first connecting frame, the outer surface of the first connecting frame is fixedly installed with a connecting rod, the bottom surface of the connecting rod is fixedly installed with a second connecting frame, and the inner wall of the second connecting frame is rotatably installed with a connecting plate. This can prevent materials from clogging the inside of the discharge pipe and affecting the normal discharge of subsequent materials.

[0005] Although the above technical solution solves the technical problem of discharge pipe blockage, the current polymerization kettle discharge device still has the following problems: the discharge speed of the polymerization kettle cannot be accurately controlled; the material discharged from the polymerization kettle contains bubbles, resulting in bubble holes or bubble cavities inside the material after solidification; the material temperature at the discharge port of the polymerization kettle cannot be stably controlled when discharging the material and the odor is strong; therefore, we propose a polymerization kettle discharge device for chemical production. Summary of the invention

[0006] Compared with the existing polymerization kettle discharging device, the polymerization kettle discharging device provided by the present invention can quickly transport materials to the storage cavity of the discharging box, thereby avoiding long-term discharging blockage of the discharging pipe of the polymerization kettle, and the discharging speed of the discharging box can be accurately controlled, the air and bubbles contained in the materials can be quickly collected, the material temperature at the discharging port can be stably controlled during discharging, and the air around the discharging port can be quickly collected and processed to avoid odor diffusion pollution.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A discharging device for a polymerization kettle for chemical production comprises a polymerization kettle, a discharging port at the bottom of the polymerization kettle is provided with a horizontally arranged screw discharging machine, the screw discharging machine is connected to the discharging device, the discharging device comprises a discharging box and an extrusion block, the discharging box is provided with a storage cavity with an open top, the extrusion block is slidably plugged into the top of the storage cavity, the extrusion block is tightly matched with the storage cavity, a mounting frame is provided on the top of the discharging box, a motor with a main shaft arranged downward is provided on the mounting frame, a screw rod is coaxially arranged on the main shaft of the motor, a connecting plate is provided on the connecting plate, a threaded hole is provided on the connecting plate, and the screw rod is threadedly connected to the threaded hole on the connecting plate; a feeding channel is provided on the left side of the storage cavity, the feeding channel is communicated with the screw discharging machine, and a pressure sensor and a first one-way valve are provided in the feeding channel;

[0009] A circulation channel is provided on the lower side of the storage cavity of the discharge box, a screw conveyor is provided in the circulation channel, a stop valve connected to the storage cavity upward is provided at the left end of the circulation channel, a second one-way valve connected to the storage cavity upward is provided at the right end of the circulation channel, the discharge direction of the second one-way valve is set downward, a vacuum joint and a discharge pipe are provided at the bottom of the discharge box, and valves are provided on the vacuum joint and the discharge pipe; a plurality of collecting holes are provided at the bottom of the extrusion block, and an air filter membrane is laid at the bottom of the extrusion block.

[0010] A cooling mechanism is provided at the bottom of the discharge box, and the cooling mechanism includes a recovery box and a cooling box. The recovery box is located on the upper side of the cooling box, and a first channel arranged in the up-down direction is provided on the recovery box. A first sleeve is provided downwardly of the first channel, and a circle of recovery holes is provided on the lower edge of the first sleeve. A second channel arranged in the up-down direction is provided on the cooling box, and the first sleeve is inserted in the second channel, and a circle of inwardly inclined cooling holes is provided on the lower edge of the second channel. The discharge pipe of the discharge box is penetrated through the first channel and the first sleeve, a connector for connecting to an external air recovery device is provided on the side of the recovery box, and a connector for connecting to external cold air is provided on the side of the cooling box.

[0011] A vacuum chamber is provided inside the extrusion block, the vacuum chamber is communicated with the collecting hole at the bottom of the extrusion block, a suction joint extending out of the extrusion block is provided upwardly of the vacuum chamber, and a valve is provided on the suction joint.

[0012] A filter screen is arranged on the lower side of the stop valve.

[0013] The recycling box and the cooling box are both metal boxes, and the recycling box and the cooling box are connected by a magnetic sheet.

[0014] The air filter membrane is a PTFE air filter membrane, and the thickness of the air filter membrane is 6mm-15mm.

[0015] A row of heating pipes is arranged on the side of the discharge box.

[0016] The motor is a forward and reverse reduction motor.

[0017] At least four discharge pipes are arranged at the bottom of the discharge box.

[0018] Beneficial Effects

[0019] By adopting the above technical solution, the beneficial effects of the present invention are:

[0020] The present invention provides a discharging device for a polymerization kettle for chemical production. After the materials in the polymerization kettle complete the polymerization reaction and meet the discharging requirements, the materials are quickly conveyed to the storage cavity of the discharging box, so as to avoid the discharging pipe of the polymerization kettle being blocked for a long time. After the materials enter the storage cavity, the stop valve between the circulation channel and the storage cavity is opened, and the screw conveyor is reversed to drive the materials to rotate clockwise between the storage cavity, the second one-way valve, the circulation channel and the stop valve. The suction joint on the top of the extrusion block is connected to the external negative pressure device to evacuate the vacuum cavity inside the extrusion block, and the collection hole generates negative pressure. The air and bubbles contained in the material during the circulation process enter the collection hole through the air filter membrane. When the air inside the material is collected, the screw conveyor is controlled to rotate forward, the extrusion block is squeezed downward, and the valve on the discharging pipe is opened at the same time, and the discharging box starts to accurately discharge the materials.

[0021] A cooling mechanism is provided at the bottom of the discharge box. The inwardly inclined cooling holes at the bottom of the cooling box spray cold air toward the outlet of the discharge pipe, so that the material is quickly cooled and formed when discharged. The collecting holes at the bottom of the first sleeve of the recovery box quickly recover the air at the outlet of the discharge pipe to avoid the spread of material odor.

[0022] In summary, the polymerization kettle discharging device provided by the present invention for chemical production, compared with the existing polymerization kettle discharging device, can quickly transport the material to the storage cavity of the discharging box, thereby avoiding long-term discharging blockage of the discharging pipe of the polymerization kettle, and the discharging speed of the discharging box can be accurately controlled. The air and bubbles contained in the material can be quickly collected, and the material temperature at the discharging port can be stably controlled during discharging. The air around the discharging port can be quickly collected and processed to avoid odor diffusion pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0024] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the structure of the present invention without installing a cooling mechanism;

[0026] Figure 4 for Figure 1 The main view of

[0027] Figure 5 It is a cross-sectional structural schematic diagram of the discharging device in the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the extrusion block in the present invention;

[0029] Figure 7 The structure of the cooling mechanism in the present invention is shown in FIG. Figure 1 ;

[0030] Figure 8 The structure of the cooling mechanism in the present invention is shown in FIG. Figure 2 .

[0031] Polymerization kettle 1, screw discharger 2, discharge box 3, extrusion block 4, storage chamber 5, mounting frame 6, motor 7, screw 8, connecting plate 9, feed channel 10, pressure sensor 11, first one-way valve 12, circulation channel 13, screw conveyor 14, stop valve 15, second one-way valve 16, vacuum joint 17, discharge pipe 18, collecting hole 19, air filter membrane 20, recovery box 21, cooling box 22, first sleeve 23, second channel 24, cooling hole 25, vacuum chamber 26, suction joint 27, filter screen 28, heating tube 29. DETAILED DESCRIPTION

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0034] like Figure 1-Figure 8 As shown, a discharging device of a polymerization kettle for chemical production comprises a polymerization kettle 1, a discharging port at the bottom of the polymerization kettle 1 is provided with a horizontally arranged screw discharging machine 2, the screw discharging machine 2 is connected to the discharging device, the discharging device comprises a discharging box 3 and an extrusion block 4, the discharging box 3 is provided with a storage cavity 5 with an open top, the extrusion block 4 is slidably plugged on the top of the storage cavity 5, the extrusion block 4 is tightly matched with the storage cavity 5, a mounting frame 6 is provided on the top of the discharging box 3, a motor 7 with a main shaft arranged downward is provided on the mounting frame 6, a screw 8 is coaxially arranged on the main shaft of the motor 7, a connecting plate 9 is provided on the connecting plate 9, a threaded hole is provided on the connecting plate 9, and the screw 8 is threadedly connected with the threaded hole on the connecting plate 9; a feeding channel 10 is provided on the left side of the storage cavity 5, the feeding channel 10 is communicated with the screw discharging machine 2, and a pressure sensor 11 and a first one-way valve 12 are provided in the feeding channel 10;

[0035] A circulation channel 13 is provided at the lower side of the storage chamber 5 of the discharge box 3, a screw conveyor 14 is provided in the circulation channel 13, a stop valve 15 connected to the storage chamber 5 upward is provided at the left end of the circulation channel 13, a second one-way valve 16 connected to the storage chamber 5 upward is provided at the right end of the circulation channel 13, the discharge direction of the second one-way valve 16 is set downward, a vacuum joint 17 and a discharge pipe 18 are provided at the bottom of the discharge box 3, and valves are provided on the vacuum joint 17 and the discharge pipe 18; a plurality of collecting holes 19 are opened at the bottom of the extrusion block 4, and an air filter membrane 20 is laid at the bottom of the extrusion block 4.

[0036] A cooling mechanism is provided at the bottom of the discharge box 3, and the cooling mechanism includes a recovery box 21 and a cooling box 22. The recovery box 21 is located on the upper side of the cooling box 22. A first channel arranged in the up-down direction is provided on the recovery box 21. A first sleeve 23 is provided downwardly of the first channel. A circle of recovery holes is provided on the lower edge of the first sleeve 23. A second channel 24 arranged in the up-down direction is provided on the cooling box 22. The first sleeve 23 is inserted in the second channel 24. A circle of inwardly inclined cooling holes 25 is provided on the lower edge of the second channel 24. The discharge pipe 18 of the discharge box 3 is passed through the first channel and the first sleeve 23. A connector for connecting to an external air recovery device is provided on the side of the recovery box 21, and a connector for connecting to external cold air is provided on the side of the cooling box 22.

[0037] A vacuum chamber 26 is provided inside the extrusion block 4 , and the vacuum chamber 26 is communicated with the collecting hole 19 at the bottom of the extrusion block 4 . A suction joint 27 extending out of the extrusion block 4 is provided upwardly in the vacuum chamber 26 , and a valve is provided on the suction joint 27 .

[0038] A filter screen 28 is provided at the lower side of the stop valve 15. When the material rotates clockwise, it passes through the filter screen 28, and the bubbles and air in the material are cut and separated by the filter screen 28, emerge upward from the material, and are collected by the collection hole 19 at the bottom of the extrusion block 4.

[0039] The recycling box 21 and the cooling box 22 are both metal boxes, which are connected by a magnetic sheet. The recycling box 21 is adsorbed to the bottom of the discharge box 3 by the magnetic sheet. The recycling box 21 and the cooling box 22 can be flexibly set according to the operation.

[0040] The air filter membrane 20 is a PTFE air filter membrane, and the thickness of the air filter membrane 20 is 6 mm-15 mm.

[0041] A row of heating pipes 29 are provided on the side of the discharge box 3. The heating pipes 29 are turned on according to the operation requirements to heat the materials in the discharge box 3 so that the materials maintain a stable temperature.

[0042] The motor is a forward and reverse reduction motor.

[0043] At least four discharge pipes 18 are provided at the bottom of the discharge box 3 .

[0044] In the existing discharging device of the polymerization kettle, after the materials in the polymerization kettle complete the polymerization reaction, the discharging operation is carried out using a discharging pipe. Only after the materials in the polymerization kettle are completely discharged, the polymerization reaction can be carried out again; after the materials in the polymerization kettle 1 in the present invention complete the polymerization reaction, the materials are quickly transported to the discharging box 3, and the polymerization kettle 1 can carry out the polymerization reaction again, and the operation efficiency is greatly improved. Example

[0045] The present invention adopts the cooperation of the discharge box 3 and the extrusion block 4. After the material in the polymerization kettle 1 completes the polymerization reaction and meets the discharge requirements, the extrusion block 4 is controlled to completely fill the storage chamber 5. The storage chamber 5 and the circulation channel 13 are evacuated through the vacuum joint 17 at the bottom of the discharge box 3. The spiral discharger 2 quickly transports the material to the storage chamber 5 through the feed channel 10. When the material is transported to the feed channel 10, the pressure sensor 11 in the feed channel 10 receives the material extrusion pressure. When the material extrusion pressure reaches the set value, the controller controls the motor 7 to operate, and the motor 7 drives the screw 8 to drive the extrusion block 4 to slide upward, and the material enters the storage chamber 5. The extrusion pressure received by the pressure sensor 11 in the feed channel 10 is lower than the set value After that, the extrusion block 4 stops moving; the stop valve 15 between the circulation channel 13 and the storage chamber 5 is opened, and the screw conveyor 14 is reversed to drive the material to rotate clockwise between the storage chamber 5, the second one-way valve 16, the circulation channel 13 and the stop valve 15. The suction joint 27 on the top of the extrusion block 4 is connected to the external negative pressure device to evacuate the vacuum chamber 26 inside the extrusion block 4. The vacuum chamber 26 is connected to the collecting hole 19 at the bottom of the extrusion block 4. The collecting hole 19 generates negative pressure. The air and bubbles contained in the material during the circulation process enter the collecting hole 19 through the air filter membrane 20; when the air inside the material is collected, the screw conveyor 14 is controlled to rotate forward, and the valve on the discharge pipe 18 is opened at the same time, and the discharge box 3 starts to discharge the material.

[0046] The present invention provides a discharging device for a polymerization kettle 1 for chemical production. Compared with the existing discharging device for a polymerization kettle, the present invention can quickly transport the material to the storage cavity 5 of the discharging box 3, thereby avoiding the discharging pipe 18 of the polymerization kettle 1 from being blocked for a long time. The discharging speed of the discharging box 3 can be accurately controlled, the air and bubbles contained in the material can be quickly collected, the material temperature at the discharging port can be stably controlled during discharging, and the air around the discharging port can be quickly collected and processed to avoid odor diffusion and pollution.

[0047] The PTFE air filter membrane 20 used in the present invention is conventional technology, and its structural features are not described in detail.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A discharging device for a polymerization kettle for chemical production, comprising a polymerization kettle, a discharging port at the bottom of the polymerization kettle is provided with a horizontally arranged screw discharging machine, the screw discharging machine is connected to the discharging device, and is characterized in that: The discharging device comprises a discharging box and an extrusion block, wherein the discharging box is provided with a storage cavity with an open top, the extrusion block is slidably inserted at the top of the storage cavity, the extrusion block is tightly matched with the storage cavity, a mounting frame is provided at the top of the discharging box, a motor with a main shaft arranged downward is provided on the mounting frame, a screw is coaxially arranged on the main shaft of the motor, the extrusion block is provided with a connecting plate, a threaded hole is provided on the connecting plate, and the screw is threadedly connected with the threaded hole on the connecting plate; a feeding channel is provided on the left side of the storage cavity, the feeding channel is connected with the spiral discharging machine, and a pressure sensor and a first one-way valve are provided in the feeding channel; A circulation channel is provided at the lower side of the storage chamber of the discharge box, a screw conveyor is provided in the circulation channel, a stop valve connected to the storage chamber upward is provided at the left end of the circulation channel, a second one-way valve connected to the storage chamber upward is provided at the right end of the circulation channel, the discharge direction of the second one-way valve is set downward, a vacuum joint and a discharge pipe are provided at the bottom of the discharge box, and valves are provided on the vacuum joint and the discharge pipe; a plurality of collecting holes are provided at the bottom of the extrusion block, and an air filter membrane is laid at the bottom of the extrusion block; A cooling mechanism is provided at the bottom of the discharge box, and the cooling mechanism includes a recovery box and a cooling box. The recovery box is located on the upper side of the cooling box, and a first channel arranged in the up-down direction is provided on the recovery box. A first sleeve is provided downwardly of the first channel, and a circle of recovery holes is provided at the lower edge of the first sleeve. A second channel arranged in the up-down direction is provided on the cooling box, and the first sleeve is inserted in the second channel. A circle of cooling holes inclined inwardly is provided at the lower edge of the second channel. The discharge pipe of the discharge box is passed through the first channel and the first sleeve. A joint for connecting an external air recovery device is provided on the side of the recovery box, and a joint for connecting an external cold air is provided on the side of the cooling box. A vacuum chamber is provided inside the extrusion block, which is connected to the collecting hole at the bottom of the extrusion block. A suction joint extending out of the extrusion block is provided upwardly from the vacuum chamber, and a valve is provided on the suction joint. A filter is provided at the lower side of the stop valve.

2. The discharging device of a polymerization reactor for chemical production according to claim 1, characterized in that: The recycling box and the cooling box are both metal boxes, and the recycling box and the cooling box are connected by a magnetic sheet.

3. The discharging device of a polymerization reactor for chemical production according to claim 2, characterized in that: The air filter membrane is a PTFE air filter membrane, and the thickness of the air filter membrane is 6mm-15mm.

4. The discharging device of a polymerization reactor for chemical production according to claim 3, characterized in that: A row of heating pipes is arranged on the side of the discharge box.

5. A discharging device for a polymerization reactor for chemical production according to claim 4, characterized in that: The motor is a forward and reverse reduction motor.

6. A discharging device for a polymerization reactor for chemical production according to claim 5, characterized in that: At least four discharge pipes are arranged at the bottom of the discharge box.

Images