Quantitative automatic adding device for solid caustic soda flakes

Abstract

The utility model discloses an automatic quantitative solid caustic soda flake adding device which comprises a nitrogen sealing hopper, a weightlessness metering scale arranged on the nitrogen sealing hopper, a flexible connection material pipe fixedly connected to the lower surface of the nitrogen sealing hopper, a spiral conveyor fixedly connected to the lower end of the flexible connection material pipe, a batch control instrument arranged on the spiral conveyor, and a control device arranged on the batch control instrument. The output end of the spiral conveyor is fixedly connected with a rotary discharging valve, the lower end of the rotary discharging valve is fixedly connected with a discharging line pipe, a stop valve is arranged on the discharging line pipe, the end, away from the rotary discharging valve, of the discharging line pipe is fixedly connected with a stirring and dissolving kettle, and the upper surface of the stirring and dissolving kettle is fixedly connected with a nitrogen line pipe. A nitrogen line pipe is fixedly connected to the upper surface of the dissolving kettle, a discharging line pipe is fixedly connected to the upper surface of the stirring and dissolving kettle, a liquid inlet line pipe is fixedly connected to the upper surface of the stirring and dissolving kettle, a discharging line pipe is fixedly connected to the lower surface of the stirring and dissolving kettle, control valves are arranged on the nitrogen line pipe, the discharging line pipe, the liquid inlet line pipe and the discharging line pipe, and by means of the devices, the subsequent dissolving efficiency and production quality can be improved.

Description

Technical Field

[0001] This utility model relates to the field of polyethylene glycol product manufacturing technology, and in particular to an automatic quantitative addition device for solid caustic soda flakes. Background Technology

[0002] The traditional method of adding solid catalysts requires dissolving them in water first, then pumping the dissolved alkali into the reactor. Because water can affect the product during the reaction, the material mixed with the catalyst needs to be vacuum dehydrated. This dehydration process also requires appropriate heating, which, due to its lengthy dehydration time, affects the production cycle, increasing energy consumption and extending production time. Furthermore, incomplete dehydration leaves residual moisture that reduces product performance. Therefore, a solid catalyst addition method was attempted, but manual addition is risky and uncontrollable. This invention achieves automatic addition and metering of solid catalysts, eliminating dehydration energy consumption, shortening the production cycle, and improving product quality. Utility Model Content

[0003] The purpose of this invention is to solve at least one of the technical problems existing in the prior art, and to provide a device for automatically adding solid caustic soda flakes. The device stores solid caustic soda flakes in a nitrogen-sealed hopper and uses a loss-in-weight scale to accurately measure the added weight, ensuring the accuracy of the addition. At the same time, the coordinated work of the flexible connecting pipe, screw conveyor and rotary discharge valve realizes the efficient and stable conveying of caustic soda flakes, and the caustic soda flakes are crushed during the conveying process, which improves the subsequent dissolution efficiency.

[0004] This utility model also provides an automatic quantitative addition device for solid caustic soda flakes, comprising: a nitrogen-sealed hopper, a loss-in-weight weighing scale mounted on the nitrogen-sealed hopper, a flexible connecting pipe fixedly connected to the lower surface of the nitrogen-sealed hopper, a screw conveyor fixedly connected to the lower end of the flexible connecting pipe, a batch control device mounted on the screw conveyor, a rotary discharge valve fixedly connected to the output end of the screw conveyor, a discharge line fixedly connected to the lower end of the rotary discharge valve, a shut-off valve mounted on the discharge line, a stirring and dissolving vessel fixedly connected to the end of the discharge line away from the rotary discharge valve, a nitrogen line fixedly connected to the upper surface of the stirring and dissolving vessel, a discharge line fixedly connected to the upper surface of the stirring and dissolving vessel, a liquid inlet line fixedly connected to the upper surface of the stirring and dissolving vessel, and an outlet line fixedly connected to the lower surface of the stirring and dissolving vessel. Control valves are mounted on the nitrogen line, discharge line, liquid inlet line, and outlet line. This device is beneficial for improving subsequent dissolution efficiency and production quality.

[0005] According to the present invention, a solid caustic soda flakes automatic quantitative addition device is provided. The stirring and dissolving kettle is equipped with a pressure sensor. The nitrogen pipeline, discharge pipeline, pressure sensor and control valve constitute a purging and venting system. Through the above device, it is beneficial to realize the effective introduction of nitrogen into the system and the venting of residual gas.

[0006] According to the present invention, a solid caustic soda flakes automatic quantitative addition device is provided. The stirring and dissolving vessel is equipped with a liquid level sensor. The liquid inlet pipe, the liquid level sensor, and the control valve constitute a liquid level control system. Through the above device, it is beneficial to monitor and control the liquid level in the vessel in real time and accurately.

[0007] According to the present invention, a solid caustic soda flakes automatic quantitative addition device is provided, wherein the nitrogen pipeline is provided with a nitrogen inlet and the nitrogen pipeline is connected to the nitrogen sealing hopper. The above device helps to ensure the flow of gas.

[0008] According to the present invention, a solid caustic soda flakes automatic quantitative addition device is provided, wherein a motor is installed on the screw conveyor, and an auger is fixedly connected to the output end of the motor. The above device helps to ensure the stable delivery of caustic soda flakes.

[0009] According to the present invention, an automatic quantitative addition device for solid caustic soda flakes is provided. The loss-in-weight weighing scale, flexible connecting pipe, screw conveyor, and rotary discharge valve constitute the addition system. Through the above device, it is beneficial to achieve accurate metering and stable delivery of solid caustic soda flakes.

[0010] According to the present invention, a solid caustic soda flakes automatic quantitative addition device is provided, wherein the inlet pipe is provided with a liquid inlet and the outlet pipe is provided with an outlet. The above device is beneficial to realize the convenient introduction of solvent (such as water) and the smooth discharge of the dissolved solution.

[0011] Compared with existing technologies, this automatic quantitative addition device for solid caustic soda eliminates the need to dissolve the solid catalyst in water, removes the heating and dehydration process, and greatly reduces energy consumption and shortens the production cycle. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0013] Figure 1 This is an overall structural diagram of the automatic quantitative addition device for solid caustic soda flakes of this utility model.

[0014] Legend:

[0015] 1. Nitrogen-sealed hopper; 2. Loss-in-weight weighing scale; 3. Screw conveyor; 4. Rotary discharge valve; 5. Flexible connecting pipe; 6. Shut-off valve; 7. Stirring and dissolving kettle; 8. Liquid level control system; 9. Purging and purging system; 10. Discharge line; 11. Nitrogen line; 12. Nitrogen inlet; 13. Discharge line; 14. Pressure sensor; 15. Control valve; 16. Liquid level sensor; 17. Liquid inlet line; 18. Liquid inlet; 19. Discharge line; 20. Discharge port. Detailed Implementation

[0016] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0017] Reference Figure 1 This utility model provides an automatic quantitative addition device for solid caustic soda flakes, comprising: a nitrogen-sealed hopper 1, a loss-in-weight weighing scale 2 mounted on the nitrogen-sealed hopper 1, a flexible connecting pipe 5 fixedly connected to the lower surface of the nitrogen-sealed hopper 1, a screw conveyor 3 fixedly connected to the lower end of the flexible connecting pipe 5, a motor mounted on the screw conveyor 3, an auger fixedly connected to the output end of the motor, a batch control device mounted on the screw conveyor 3, and a rotary discharge valve 4 fixedly connected to the output end of the screw conveyor 3. The loss-in-weight weighing scale 2, the flexible connecting pipe 5, the screw conveyor 3, and the rotary discharge valve 4 constitute an addition system. A discharge line pipe 10 is fixedly connected to the lower end of the rotary discharge valve 4, a shut-off valve 6 is mounted on the discharge line pipe 10, and a stirring and dissolving kettle 7 is fixedly connected to the end of the discharge line pipe 10 away from the rotary discharge valve 4.

[0018] Specifically, the nitrogen-sealed hopper 1 stores solid caustic soda flakes and isolates them from air to prevent them from reacting with moisture, carbon dioxide, etc. in the air, thus ensuring the quality and purity of the caustic soda flakes. At the same time, a loss-in-weight weighing scale 2 is installed on the nitrogen-sealed hopper 1 to accurately measure the added weight during the operation of the device. When the added weight reaches the set value, the upper end of the flexible connecting pipe 5 is fixedly connected to the lower surface of the nitrogen-sealed hopper 1, and the lower end is connected to the screw conveyor 3. It can use its own soft and deformable characteristics as a buffer component to transport the caustic soda flakes to the screw conveyor 3. The screw conveyor 3 starts the auger to rotate inside the screw conveyor 3 under the power provided by the motor. Under the pushing action of the auger's spiral blades, it moves forward along the trajectory of the spiral blades, realizing the conveying of caustic soda flakes from the nitrogen-sealed hopper 1 to the rotary discharge valve 4. During the conveying process, the rotation of the auger's spiral blades will generate a certain amount of squeezing and friction on the caustic soda flakes, further crushing the caustic soda flakes and improving the subsequent dissolution efficiency.

[0019] The rotary valve 4, installed at the output end of the screw conveyor 3, has multiple evenly distributed feed troughs on its valve core. The caustic soda flakes conveyed from the screw conveyor 3 enter the feed troughs sequentially and are quantitatively fed into the feed line 10 as the valve core rotates. In addition, the rotation of the rotary valve 4 can also break up any bridging that may occur during the conveying process of the caustic soda flakes, preventing material blockage and ensuring that the caustic soda flakes can smoothly enter the mixing and dissolving kettle. The shut-off valve 6 is installed on the feed line 10. During normal feeding, the shut-off valve 6 is in the open state, allowing the caustic soda flakes to enter the mixing and dissolving kettle 7 through the feed line 10. When the amount of caustic soda flakes added reaches the set value, the batch controller sends a stop feeding signal, and the shut-off valve 6, screw conveyor 3, and rotary valve 4 will immediately close to prevent the caustic soda flakes from falling further and ensure the accuracy of the added amount.

[0020] Reference Figure 1 A nitrogen pipeline 11 is fixedly connected to the upper surface of the stirred dissolving vessel 7. The nitrogen pipeline 11 is provided with a nitrogen inlet 12 and is connected to the nitrogen sealing hopper 1. A discharge pipeline 13 is fixedly connected to the upper surface of the stirred dissolving vessel 7. A liquid inlet pipeline 17 is fixedly connected to the upper surface of the stirred dissolving vessel 7. A liquid inlet 18 is provided on the liquid inlet pipeline 17. A discharge pipeline 19 is fixedly connected to the lower surface of the stirred dissolving vessel 7. A discharge port 20 is provided on the discharge pipeline 19. A control valve 15 is provided on the nitrogen pipeline 11, the discharge pipeline 13, the liquid inlet pipeline 17, and the discharge pipeline 19. A pressure sensor 14 is provided on the stirred dissolving vessel 7. The nitrogen pipeline 11, the discharge pipeline 13, the pressure sensor 14, and the control valve 15 constitute a purging and cleaning system 9. A liquid level sensor 16 is provided on the stirred dissolving vessel 7. The liquid inlet pipeline 17, the liquid level sensor 16, and the control valve 15 constitute a liquid level control system 8.

[0021] Specifically, nitrogen line 11 has a nitrogen inlet 12 at one end and is connected to nitrogen sealing hopper 1 at the other end. Nitrogen enters nitrogen line 11 through nitrogen inlet 12 and is then delivered to stirring dissolving vessel 7 and nitrogen sealing hopper 1 respectively. Introducing nitrogen into stirring dissolving vessel 7 and nitrogen sealing hopper 1 effectively isolates air, preventing caustic soda flakes from reacting with moisture, carbon dioxide, etc., in the air during storage and dissolution, thus ensuring the quality and purity of caustic soda flakes. It also maintains stable pressure within the system, preventing corrosion of the equipment caused by external air. Liquid inlet line 17 has a liquid inlet 18, through which solvent (such as water) enters. The solvent is fed into the inlet pipe 17 and then into the stirred dissolving vessel 7. The stirred dissolving vessel 7 is equipped with a liquid level sensor 16, which monitors the liquid level in the vessel in real time and transmits the liquid level signal to the control system. When the liquid level is lower than the set lower limit, the control system opens the control valve 15 on the inlet pipe 17, and the solvent enters the stirred dissolving vessel 7 through the inlet pipe 17, and the liquid level gradually rises. When the liquid level reaches the set upper limit, the control system closes the control valve 15 and stops the addition of solvent, thereby achieving precise control of the liquid level inside the stirred dissolving vessel 7 and ensuring that the caustic soda flake dissolution process is carried out under suitable liquid level conditions.

[0022] The discharge line 19 is fixedly connected to the lower surface of the stirred dissolving vessel 7. The discharge line 19 has a discharge port 20. After the caustic soda flakes are completely dissolved in the stirred dissolving vessel 7 and after purging and other operations, the dissolved liquid can be discharged through the discharge line 19 from the discharge port 20 and enter the subsequent reaction vessel or other processing equipment. Control valves 15 are installed on the nitrogen line 11, discharge line 13, liquid inlet line 18, and discharge line 19. The control valves 15 are precisely controlled by the control system according to a preset program and signals from the liquid level sensor 17, pressure sensor 14, etc. During the purging and cleaning process, the nitrogen line is controlled... The control valves 15 on pipe 11 and discharge line pipe 13 enable the introduction of nitrogen gas and the venting of dissolved gas. Throughout the process, the control valves 15 on nitrogen line pipe 11, discharge line pipe 13, liquid inlet pipe 18, and discharge line pipe 19, as well as pressure sensor 14, liquid level sensor 17, and other equipment are connected to the PLC control system via circuits. The PLC control system receives signals from each sensor and, according to the preset program and parameters, precisely controls the control valves to achieve automated operation and precise control of the stirring dissolving tank, ensuring that the dissolution of caustic soda flakes and the transfer of the dissolved liquid proceed efficiently and stably.

[0023] Working principle: The solid caustic soda quantitative automatic addition device consists of an addition system, a purging and purging system 9, and a liquid level control system 8. The addition system includes a nitrogen-sealed hopper 1 (which stores solid caustic soda and isolates it from air to prevent deterioration, and a loss-in-weight weighing scale 2 on it accurately measures the added weight), a flexible connecting pipe 5 (which acts as a buffer to transport the caustic soda to the screw conveyor 3), a screw conveyor 3 (driven by a motor to rotate and push the caustic soda forward and crush it), a rotary discharge valve 4 (the valve core has a material trough to quantitatively transport the caustic soda to the discharge line 10 and prevent bridging and blockage), and a shut-off valve 6 (opens during normal addition, and closes together with the screw conveyor 3 and the rotary discharge valve 4 when the added amount reaches the set value to ensure accurate addition). The discharge line 10 connects the rotary discharge valve 4 to the stirring and dissolving kettle 7. The purging and purging system 9 consists of a nitrogen line 11 (which introduces nitrogen to isolate air and maintain stable pressure), a discharge line 13, a pressure sensor 14, and a control valve 15. The system consists of a nitrogen inlet 12 at one end of a nitrogen line 11 and a nitrogen sealing hopper 1 at the other end; a liquid level control system 8 consisting of an inlet pipe 17 (solvent enters from the liquid inlet 18 and is transported to the stirred dissolving vessel 7), a liquid level sensor 16 (which monitors the liquid level in the vessel in real time and transmits signals to the control system to achieve precise liquid level control), and a control valve 15; a discharge pipe 19 is connected to the lower surface of the stirred dissolving vessel 7 (after the caustic soda flakes are dissolved, the dissolved liquid is discharged from the discharge port 20 after purging and other operations); the control valve 15 on the nitrogen line 11, discharge pipe 13, inlet pipe 17, and discharge pipe 19, as well as the pressure sensor 14, liquid level sensor 16, and other equipment are connected to the PLC control system through wiring. The PLC control system receives the sensor signals and precisely controls the control valves according to the preset program and parameters to achieve automated operation and precise control of the stirred dissolving vessel, ensuring efficient and stable operation of the caustic soda flakes dissolution and dissolved liquid transfer process.

[0024] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A solid caustic soda dosing automatic adding device, characterized in that, Include: Nitrogen sealed hopper (1), the nitrogen sealed hopper (1) is provided with the loss of weight metering scale (2), the lower surface of nitrogen sealed hopper (1) is fixedly connected with soft connection material pipe (5), the lower end of soft connection material pipe (5) is fixedly connected with screw conveyor (3), the screw conveyor (3) is provided with batch control instrument, the output end of screw conveyor (3) is fixedly connected with rotary discharge valve (4), the lower end of rotary discharge valve (4) is fixedly connected with discharge line pipe (10), the discharge line pipe (10) is provided with cut-off valve (6), the end of discharge line pipe (10) away from rotary discharge valve (4) is fixedly connected with stirring dissolving kettle (7), the upper surface of stirring dissolving kettle (7) is fixedly connected with nitrogen line pipe (11), stirring dissolving kettle (7) is fixedly connected with discharge line pipe (13) on the upper surface, the upper surface of stirring dissolving kettle (7) is fixedly connected with liquid inlet line pipe (17), the lower surface of stirring dissolving kettle (7) is fixedly connected with discharge line pipe (19), nitrogen line pipe (11), discharge line pipe (13), liquid inlet line pipe (17), discharge line pipe (19) are all provided with control valve (15).

2. The solid caustic soda dosing device according to claim 1, characterized in that, The stirring dissolving kettle (7) is provided with pressure sensor (14), and the nitrogen line pipe (11), the discharge line pipe (13), the pressure sensor (14) and the control valve (15) constitute a purge exhaust system (9).

3. The solid caustic soda dosing device according to claim 1, characterized in that, The stirring dissolving kettle (7) is provided with liquid level sensor (16), and the liquid inlet line pipe (17), the liquid level sensor (16) and the control valve (15) constitute a liquid level control system (8).

4. The solid caustic soda dosing device according to claim 1, characterized in that, The nitrogen line pipe (11) is provided with a nitrogen inlet (12), and the nitrogen line pipe (11) is communicated with the nitrogen sealed hopper (1).

5. The solid caustic soda dosing device according to claim 1, characterized in that, The screw conveyor (3) is provided with a motor, and the output end of the motor is fixedly connected with an auger.

6. The solid caustic soda dosing device according to claim 1, characterized in that, The loss of weight metering scale (2), the soft connection material pipe (5), the screw conveyor (3) and the rotary discharge valve (4) constitute an adding system.

7. The solid caustic soda dosing device according to claim 1, characterized in that, The liquid inlet line pipe (17) is provided with a liquid inlet (18), and the discharge line pipe (19) is provided with a discharge port (20).

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