High-precision n-butyraldehyde dropwise adding and dynamic flow adjusting system

Abstract

The utility model relates to the technical field of chemical liquid dropwise adding, and discloses a high-precision n-butyraldehyde dropwise adding and dynamic flow adjusting system which comprises a raw material storage tank, a dropwise adding tank, a dropwise adding control unit, a flow adjusting and feedback unit, an automatic control module and a sensing monitoring module. The input end of the main pump is communicated with the interior of the raw material storage tank, the output end of the main pump is communicated with a main feeding tank, the input end of the auxiliary pump is communicated with the interior of the raw material storage tank, the output end of the auxiliary pump is communicated with an adjusting pipeline, and proportioning valves are installed outside the adjusting pipeline and the main feeding pipeline. According to the system, the double-pump flow dividing device is adopted, precise feeding and intelligent control are combined, efficient, stable and automatic material feeding is achieved in the PVB resin powder production process, the quality and efficiency of the production process are remarkably improved, and the system has wide industrial application value.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chemical liquid drop adding, specifically to a high-precision n-butyl aldehyde drop adding and dynamic flow regulation system. BACKGROUND

[0002] N-butyl aldehyde is an important chemical raw material and intermediate, which is widely used in organic synthesis, polymer production and resin material preparation. It plays an irreplaceable role in various chemical reactions, such as producing plasticizer, paint, synthetic rubber, pharmaceutical intermediates, etc. In the chemical synthesis process, the reaction characteristics of n-butyl aldehyde include high volatility, strong reactivity and easy self-polymerization, so the control of its drop rate and dosage is very important. In the production process of polyvinyl butyral resin powder, n-butyl aldehyde is one of the most important aldehyde reactants.

[0003] In actual production process, the synthesis of PVB resin powder requires highly precise n-butyl aldehyde drop control. If the drop amount is insufficient, the reaction is incomplete, which leads to the residue of unreacted PVA in PVB resin powder, and further causes the decrease of membrane transparency, unstable adhesion and other quality problems; if the drop amount is too much, it may produce side reactions, leading to excessive acetalization and deterioration of resin performance. In addition, n-butyl aldehyde has high volatility and irritating odor, and the traditional production process has the following main technical problems:

[0004] Firstly, the flow control precision of traditional equipment can only reach ±5%, which cannot meet the high precision requirement of n-butyl aldehyde drop in industrial synthesis process;

[0005] Secondly, the acetalization reaction speed of PVB resin is greatly affected by the dynamic changes of temperature and pressure, and the traditional drop system cannot quickly respond to process changes, which easily leads to reaction over-limit or deficiency;

[0006] Thirdly, long-term use will cause wear of metering pump, solenoid valve and other equipment, and the drop precision will decrease. For long-term production process of highly volatile medium, corrosion resistance and chemical degradation resistance become the key to equipment selection;

[0007] Fourthly, traditional equipment mostly uses manual adjustment, which has low production efficiency and poor process control stability, and cannot meet the intelligent requirement of large-scale automatic production line;

[0008] Fifthly, the high volatility of n-butyl aldehyde makes it easy to emit strong odor in the air, and the traditional open drop process cannot meet the increasingly strict environmental protection and safety standards.

[0009] Based on the above problems, aiming at the n-butyl aldehyde drop and flow regulation requirement in PVB resin powder synthesis process, the utility model provides a high-precision n-butyl aldehyde drop and dynamic flow regulation system. UTILITY MODEL CONTENTS

[0010] In view of the deficiencies of the prior art, the utility model provides a high accuracy n butyl aldehyde drop and dynamic flow regulation system to solve the problems mentioned in the foregoing background art.

[0011] In order to realize the above object, the utility model provides the following technical scheme: a high accuracy n butyl aldehyde drop and dynamic flow regulation system, including raw material storage tank, drop tank, drop control unit, flow regulation and feedback unit, automatic control module and sensing monitoring module, the drop control unit includes main pump, auxiliary pump and electromagnetic flowmeter, the input of main pump is linked with the inside of raw material storage tank, the output of main pump is connected with main feed tank, the input of auxiliary pump is linked with the inside of raw material storage tank, the output of auxiliary pump is connected with adjusting pipeline, the adjusting pipeline is linked with main feed pipeline, the inside of main feed pipeline is linked with the inside of drop tank, the outside of adjusting pipeline and main feed pipeline is equipped with proportional regulating valve, the electromagnetic flowmeter is installed in the inside of adjusting pipeline and main feed pipeline.

[0012] Further, the flow regulation and feedback unit includes a mass flow controller, a flow detection sensor, and a data acquisition module.

[0013] Further, the automatic control module includes a PLC controller, a human-machine interface, and a remote monitoring module.

[0014] Further, the sensing monitoring module includes a temperature sensor, a pressure sensor, and a flow rate sensor.

[0015] Further, the inside of the raw material storage tank is provided with a temperature control device, and the temperature control device uses circulating water cooling.

[0016] Further, the top outer surface of the raw material storage tank is connected with a feed hopper, the inner wall of the feed hopper is fixedly connected with a receiving ring, the outer surface of the receiving ring is provided with a fixing ring, the inner ring of the fixing ring is provided with a filter screen, a plurality of positioning holes are formed in the outer surfaces of the receiving ring and the fixing ring, and positioning pins are arranged at the corresponding positioning holes of the receiving ring and the fixing ring.

[0017] Further, the outside of the raw material storage tank is installed with an airtight sealing valve and an explosion-proof safety valve.

[0018] Further, the inside of the raw material storage tank is installed with an ultrasonic liquid level sensor.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] 1. The high-precision n-butyraldehyde dropping and dynamic flow regulating system adopts bidirectional flow detection and closed-loop control, the flow precision reaches ±0.1%, realizes ultraprecise liquid delivery, the dynamic response time is less than 1 second, can quickly respond to production line changes, improves process stability and product consistency, is high in precision and fast in dynamic response.

[0021] 2. The high-precision n-butyraldehyde dropping and dynamic flow regulating system is configured with a PLC controller and a self-adaptive control algorithm, realizes full-automatic regulation and real-time optimal control, supports remote monitoring and data storage, displays historical data and alarm records in real time, is convenient for production management, and is high in intelligent degree.

[0022] 3. The high-precision n-butyraldehyde dropping and dynamic flow regulating system is equipped with multistage safety protection devices, including temperature, pressure, flow abnormality alarm and emergency shutdown systems, all key components adopt corrosion-resistant materials, is suitable for long-term operation of high-volatility chemical media, is safe and reliable, and is suitable for harsh environments.

[0023] 4. The high-precision n-butyraldehyde dropping and dynamic flow regulating system adopts modular design, is convenient to install and maintain, automatically operates, reduces manual intervention, significantly reduces the operation failure rate and maintenance cost, is low in maintenance cost, and is stable in operation.

[0024] 5. The high-precision n-butyraldehyde dropping and dynamic flow regulating system is suitable for various production processes such as fine chemical industry, medicine and chemical synthesis, is flexible in adaptation to different process flows and material characteristics, is widely applied, and is strong in compatibility. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole structure schematic view of the utility model;

[0026] Figure 2 It is a main pump structure schematic view of the utility model;

[0027] Figure 3 It is an auxiliary pump structure schematic view of the utility model;

[0028] Figure 4 It is a proportional regulating valve structure schematic view of the utility model;

[0029] Figure 5 It is a feeding hopper and related structure schematic view of the utility model;

[0030] Figure 6 It is a feeding hopper and related structure explosion schematic view of the utility model.

[0031] In the figure: 1, raw material storage tank; 2, main pump; 3, auxiliary pump; 4, regulating pipeline; 5, main feeding pipeline; 6, drop tank; 7, proportional regulating valve; 8, feeding hopper; 9, receiving ring; 10, fixing ring; 11, filter screen; 12, positioning pin. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0033] Embodiment 1:

[0034] Please refer to Figures 1-6 The utility model provides a kind of technical solutions: a high-precision n-butyraldehyde drop and dynamic flow regulation system, including raw material storage tank 1, drop tank 6, drop control unit, flow regulation and feedback unit, automatic control module and sensing monitoring module, drop control unit includes main pump 2, auxiliary pump 3 and electromagnetic flowmeter, the input end of main pump 2 is connected with the inside of raw material storage tank 1, the output end of main pump 2 is communicated with main feeding tank, the input end of auxiliary pump 3 is connected with the inside of raw material storage tank 1, the output end of auxiliary pump 3 is communicated with regulating pipeline 4, regulating pipeline 4 is communicated with main feeding pipeline 5, main feeding pipeline 5 is communicated with the inside of drop tank 6, the outside of regulating pipeline 4 and main feeding pipeline 5 is equipped with proportional regulating valve 7, electromagnetic flowmeter is installed in the inside of regulating pipeline 4 and main feeding pipeline 5, specifically, in normal operation mode, main pump 2 runs at constant flow rate, provides main material delivery, automatic control module receives flow rate and pressure data in real time, dynamically adjusts pump speed, keeps stable output, when main pump 2 runs abnormally or feeding flow rate fluctuates, enters automatic compensation mode, automatic control module immediately starts auxiliary pump 3, replenishes feeding through regulating pipeline 4, recovers system normal flow rate, if main pump 2 and auxiliary pump 3 fail simultaneously, enter emergency shutdown mode, system automatically stops, triggers alarm function, and records operation data, facilitate maintenance personnel to troubleshoot fault, the system adopts double pump shunt device to realize efficient, stable, automated material supply in PVB resin powder production process by the combination of precision feeding and intelligent control, significantly improve the quality and efficiency of production process, have extensive industrial application value.

[0035] In the embodiment, the flow regulation and feedback unit includes a mass flow controller, a flow detection sensor, and a data acquisition module. The flow detection sensor is installed outside the regulation pipeline 4 and the main feed pipeline 5. Specifically, the drop rate is accurately adjusted through the mass flow controller, the dynamic response time is less than 1 second, the inlet and outlet flow rates are monitored in real time through the flow detection sensor, high-precision control is ensured, real-time data acquisition and storage are realized through the data acquisition module, drop records are generated, and production management and quality tracing are facilitated.

[0036] In the embodiment, the automatic control module includes a PLC controller, a human-machine interface, and a remote monitoring module. Specifically, the PLC controller supports multi-parameter setting and automatic logic operation, accurately controls the drop process, and has built-in feed regulation algorithms and data analysis modules to realize automatic feed control and parameter adjustment. The human-machine interface supports operation state monitoring, parameter adjustment, and data export. The remote monitoring module supports remote monitoring and maintenance, and facilitates operators to monitor the equipment operation state in real time.

[0037] In the embodiment, the sensing and monitoring module includes a temperature sensor, a pressure sensor, and a flow rate sensor. The temperature sensor is installed inside the raw material storage tank 1, the pressure sensor is installed inside the main feed pipeline 5, and the flow rate sensor is installed inside the main feed pipeline 5 and the regulation pipeline 4. Specifically, the temperature sensor monitors the temperature of the feed material to ensure that the material is delivered within the target process temperature. The pressure sensor monitors the pressure in the feed pipeline to adjust the pump speed in a timely manner and prevent pipeline overpressure. The flow rate sensor detects the flow rate in the main feed and regulation pipeline 4 in real time to ensure feed accuracy.

[0038] In the embodiment, a temperature control device is arranged inside the raw material storage tank 1. The temperature control device uses circulating water cooling. Specifically, circulating water cooling is used to maintain the tank temperature at 25-30°C to prevent n-butyl aldehyde volatilization and self-polymerization.

[0039] In the embodiment, the top outer surface of the raw material storage tank 1 is connected with a feed hopper 8. The inner wall of the feed hopper 8 is fixedly connected with a receiving ring 9. The outer surface of the receiving ring 9 is provided with a fixing ring 10. The inner circle of the fixing ring 10 is provided with a filter screen 11. The outer surfaces of the receiving ring 9 and the fixing ring 10 are provided with a plurality of positioning holes. The receiving ring 9 and the fixing ring 10 are provided with a positioning pin 12 at the corresponding positioning holes. Specifically, the filter screen 11 is arranged to prevent solid impurities or large particles from entering the feed system, ensuring the safety of equipment operation. The positioning pin 12 is removed, and the fixing ring 10 is taken out, so that the filter screen 11 can be cleaned or replaced.

[0040] In the embodiment, airtight sealing valves and explosion-proof safety valves are installed outside the raw material storage tank 1. Specifically, the airtight drop device and explosion-proof design are used to reduce environmental pollution and safety hazards.

[0041] In the embodiment, an ultrasonic liquid level sensor is installed in the raw material storage tank 1, and specifically, the liquid level in the storage tank is monitored in real time through the ultrasonic liquid level sensor to ensure the continuity of the dripping process.

[0042] Working principle: when the system is running, the main pump 2 works, the main pump 2 transports the n-butyl aldehyde liquid in the raw material storage tank 1 into the main feeding tank, when the main pump 2 abnormally operates, the auxiliary pump 3 is automatically started, the feeding flow rate is supplemented, the normal operation of the whole feeding system is maintained, through the feeding adjustment algorithm and data analysis built in the PLC controller, automatic feeding control and parameter adjustment are realized, and through the man-machine interface display interface, operation state monitoring, parameter adjustment and data export are carried out, in the normal operation mode, the main pump 2 operates at a constant flow rate to provide main material conveying, the automatic control module receives flow rate and pressure data in real time, dynamically adjusts the pump speed, and keeps stable output, when the main pump 2 abnormally operates or the feeding flow rate fluctuates, enters the automatic compensation mode, the automatic control module immediately starts the auxiliary pump 3, supplements the feeding through the adjusting pipe 4, restores the normal flow rate of the system, if the main pump 2 and the auxiliary pump 3 fail at the same time, enters the emergency shutdown mode, the system automatically stops, triggers the alarm function, and records operation data, so as to facilitate maintenance personnel to troubleshoot faults, the system adopts the double-pump shunt device to realize efficient, stable and automatic material feeding in the PVB resin powder production process, significantly improves the quality and efficiency of the production process, and has wide industrial application value.

[0043] The PLC controller is of the prior structure, and the internal control circuit can be realized through simple programming of those skilled in the art, which is the common knowledge in the art, and only the use is described, without modification, so the control mode and circuit connection are not described in detail.

[0044] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision n-butyraldehyde dropwise adding and dynamic flow regulating system, comprising a raw material storage tank (1), a dropwise adding tank (6), a dropwise adding control unit, a flow regulating and feedback unit, an automatic control module and a sensing and monitoring module, characterized in that: The drop control unit comprises a main pump (2), an auxiliary pump (3) and an electromagnetic flowmeter, the input end of the main pump (2) is communicated with the inside of a raw material storage tank (1), the output end of the main pump (2) is communicated with a main feeding tank, the input end of the auxiliary pump (3) is communicated with the inside of the raw material storage tank (1), the output end of the auxiliary pump (3) is communicated with an adjusting pipeline (4), the adjusting pipeline (4) is communicated with a main feeding pipeline (5), the main feeding pipeline (5) is communicated with the inside of a drop tank (6), the outside of the adjusting pipeline (4) and the main feeding pipeline (5) is respectively provided with a proportional adjusting valve (7), and the electromagnetic flowmeter is installed in the inside of the adjusting pipeline (4) and the main feeding pipeline (5).

2. The high-precision n-butyraldehyde dropping and dynamic flow regulating system according to claim 1, characterized in that: The flow regulation and feedback unit comprises a mass flow controller, a flow detection sensor and a data acquisition module, and the flow detection sensor is installed outside the adjusting pipeline (4) and the main feeding pipeline (5).

3. The high-precision n-butyraldehyde dropping and dynamic flow regulating system according to claim 1, characterized in that: The automatic control module comprises a PLC controller, a man-machine interface and a remote monitoring module.

4. The high-precision n-butyraldehyde dropping and dynamic flow regulating system according to claim 1, characterized in that: The sensing and monitoring module comprises a temperature sensor, a pressure sensor and a flow rate sensor, the temperature sensor is installed in the inside of the raw material storage tank (1), the pressure sensor is installed in the inside of the main feeding pipeline (5), and the flow rate sensor is installed in the inside of the main feeding pipeline (5) and the adjusting pipeline (4).

5. The high-precision n-butyraldehyde dropping and dynamic flow regulating system according to claim 1, characterized in that: The inside of the raw material storage tank (1) is provided with a temperature control device, and the temperature control device adopts circulating water cooling.

6. The high-precision n-butyraldehyde dropping and dynamic flow regulating system according to claim 1, characterized in that: The top outer surface of the raw material storage tank (1) is communicated with a feeding hopper (8), the inner wall of the feeding hopper (8) is fixedly connected with a receiving ring (9), the outer surface of the receiving ring (9) is provided with a fixing ring (10), the inner ring of the fixing ring (10) is provided with a filter screen (11), a plurality of positioning holes are formed in the outer surfaces of the receiving ring (9) and the fixing ring (10), and positioning pins (12) are arranged at the corresponding positioning holes of the receiving ring (9) and the fixing ring (10).

7. The high-precision n-butyraldehyde dropping and dynamic flow regulating system according to claim 1, characterized in that: The outside of the raw material storage tank (1) is installed with an airtight sealing valve and an explosion-proof safety valve.

8. The high-precision n-butyraldehyde dropping and dynamic flow regulating system according to claim 1, characterized in that: The inside of the raw material storage tank (1) is installed with an ultrasonic liquid level sensor.

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