Full-automatic adding device and method for preventing liquid catalyst from easily crystallizing at low temperature

Abstract

The application discloses a kind of full-automatic adding device and method for preventing liquid catalyst low-temperature easy crystallization, including three-layer structure design from top to bottom in device main body, catalyst tank and hot water tank are arranged in bottom layer, middle layer is equipped with liquid inlet pump, liquid inlet flowmeter, solenoid valve, metering buffer cup, three-way solenoid valve, liquid outlet flowmeter and liquid outlet pump;Top layer is equipped with man-machine interface and control unit, and the working state of liquid inlet pump, liquid inlet flowmeter, solenoid valve, metering buffer cup, three-way solenoid valve, liquid outlet flowmeter and liquid outlet pump is controlled through man-machine interface and control unit.The application solves the problem of remote automatic addition of small-dose high-precision low-temperature easy-crystallization liquid catalyst in the production process of enterprise, which helps to improve production efficiency, improve the degree of automation of production line, reduce the safety risk of manual addition of catalyst by operating personnel on site, the whole device is accurate, stable and reliable in operation, easy to install and simple to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of adding liquid small-dose materials, and in particular to a fully automatic adding device and method for preventing a liquid catalyst from crystallizing easily at low temperatures. Background Art

[0002] In fine chemical production processes, various catalysts are often added to synthesize the final product. Years of field experience have revealed that catalysts used by companies primarily come in liquid, solid, or powdered forms. Liquid catalysts account for a larger proportion, but the dosage required is small, with some companies adding as little as 100ml per addition. These additions also require high precision, and some catalysts are prone to crystallization. These and other factors present challenges in fully automated catalyst addition in fine chemical processes, creating technical bottlenecks for achieving full process automation.

[0003] Currently, most fine chemical companies still manually add catalysts to the production process by opening the manhole of the reactor on-site and manually adding the catalyst. During production, the reactor interior is often hot and pressurized. Furthermore, most catalysts react violently upon contact with the material, releasing high-temperature or toxic or flammable gases. This poses a safety hazard to operators. Summary of the Invention

[0004] The object of the present invention is to provide a fully automatic adding device and method for preventing liquid catalyst from crystallizing at low temperature, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The application discloses a full-automatic adding device for preventing liquid catalyst from being easily crystallized at low temperature, which comprises a device main body, wherein the device main body is divided into three layers from top to bottom; a catalyst tank and a hot water tank are arranged in the bottom layer, the catalyst tank is close to the hot water tank, and a liquid accumulation groove is arranged at the bottom of the catalyst tank and the hot water tank; an inlet pump, an inlet flow meter, an electromagnetic valve, a metering buffer cup, a three-way electromagnetic valve, an outlet flow meter and an outlet pump are arranged in the middle layer of the device main body; one end of the inlet pump is connected with the catalyst tank through a pipeline, and the other end of the inlet pump is connected with the metering buffer cup through a pipeline; the inlet flow meter and the electromagnetic valve are installed on the connecting pipeline between the inlet pump and the metering buffer cup; the metering buffer cup is further connected with the outlet pump through a pipeline, and the three-way electromagnetic valve and the outlet flow meter are installed on the pipeline; the three-way electromagnetic valve is communicated with the hot water tank through a pipeline; a man-machine interface and a control unit are arranged on the top layer of the device main body, and the man-machine interface and the control unit are used for regulating and controlling the working states of the inlet pump, the inlet flow meter, the electromagnetic valve, the metering buffer cup, the three-way electromagnetic valve, the outlet flow meter and the outlet pump.

[0007] Further, a sewage outlet is arranged at the bottom of the device main body and communicated with the liquid accumulation groove; a pure water inlet is arranged on one side of the bottom layer of the device main body and communicated with the hot water tank; and a material outlet is arranged on one side of the middle layer of the device main body and communicated with the outlet end of the outlet pump.

[0008] Further, a micro-distance camera is further arranged on the middle layer of the device main body and faces the metering buffer cup, and is used for remotely transmitting the image information in the metering buffer cup to the man-machine interface.

[0009] Further, the man-machine interface is in communication connection with the control unit, the control unit is provided with a material metering module, a temperature control module, a liquid level control module and an image processing module, and each module is in electric control connection with the inlet pump, the inlet flow meter, the electromagnetic valve, the micro-distance camera, the three-way electromagnetic valve, the outlet flow meter and the outlet pump.

[0010] Further, the hot water tank arranged on the bottom layer of the device main body is used for heating each component arranged on the middle layer of the device main body through a radiation temperature heating device, so as to prevent the catalyst from being crystallized at low temperature in the components and pipelines.

[0011] Further, the electric control components arranged on the top layer of the device main body are treated by a waterproof separation layer process and the components arranged on the middle layer of the device main body.

[0012] Further, the three-way electromagnetic valve is used for switching the catalyst pipeline and the hot water pipeline in each catalyst adding process.

[0013] The application further provides another technical scheme: an adding method of the full-automatic adding device for preventing liquid catalyst from being easily crystallized at low temperature, which comprises the following steps:

[0014] Step one: set the hot water tank on one side of the catalyst tank at the bottom of the device main body, for warming the catalyst material;

[0015] Step two: control the liquid inlet pump in the middle layer by the control unit at the top of the device main body, to extract the catalyst material to the metering buffer cup;

[0016] Step three: collect the image of the extracted material in the metering buffer cup by the macro camera, and upload it to the man-machine interface for display;

[0017] Step four: the operator observes the material quantity displayed on the man-machine interface, and controls the control unit according to the extraction quantity, which can be precisely fed by the control unit comprehensive control of the liquid inlet flowmeter, electromagnetic valve, three-way electromagnetic valve, liquid outlet flowmeter and liquid outlet pump.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] The full-automatic adding device and method for preventing liquid catalyst from crystallizing at low temperature can solve the problem of remote automatic addition of small-dose high-precision liquid catalyst that is easy to crystallize at low temperature in the production process of some enterprises, which helps to improve production efficiency, improve the degree of automation of production line, reduce the safety risk of manual addition of catalyst by operators on site, and the whole device is accurate, stable and reliable in measurement, easy to install and simple to operate. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 The whole device layout structure of the present application is shown in the figure;

[0021] Fig. 2 The device control principle diagram of the present application is shown in the figure.

[0022] In the figure: 102, catalyst tank; 103, hot water tank; 101, liquid accumulation tank; 201, liquid inlet pump; 202, liquid inlet flowmeter; 203, electromagnetic valve; 204, metering buffer cup; 205, three-way electromagnetic valve; 208, liquid outlet flowmeter; 206, liquid outlet pump; 207, macro camera; 301, man-machine interface; 302, control unit; 4, blowdown; 5, pure water inlet; 6, material outlet. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Please refer toFigs. 1-2 , an embodiment of the present invention provides a fully automatic adding device for preventing liquid catalyst from crystallizing at low temperature, including a device body, which is divided into three layers from top to bottom, a catalyst tank 102 and a hot water tank 103 are arranged in the bottom layer, the catalyst tank 102 is close to the hot water tank 103, which helps to heat up the catalyst material and prevent the catalyst from crystallizing at low temperature, and a liquid accumulation tank 101 is provided at the bottom of the catalyst tank 102 and the hot water tank 103; a liquid inlet pump 201, a liquid inlet flow meter 202, a solenoid valve 203, a metering buffer cup 204, a three-way solenoid valve 205, a liquid outlet flow meter 208 and a liquid outlet pump 206 are provided in the middle layer of the device body; with the temperature radiation of the hot water tank 103 in the bottom layer, when the external ambient temperature of the device is not too low, the device does not need to turn on the active heating system to ensure that the catalyst does not crystallize in these components, which not only enables the system to work stably but also helps to reduce energy consumption of the device; wherein One end of the liquid inlet pump 201 is connected to the catalyst tank 102 through a pipeline, and the other end is connected to the metering buffer cup 204 through a pipeline; the liquid inlet flowmeter 202 and the solenoid valve 203 are installed on the connecting pipeline between the liquid inlet pump 201 and the metering buffer cup 204; the metering buffer cup 204 is also connected to the liquid outlet pump 206 through a pipeline, and a three-way solenoid valve 205 and a liquid outlet flowmeter 208 are installed on the pipeline; the three-way solenoid valve 205 is connected to the hot water tank 103 through a pipeline; the top layer of the device body is provided with a human-machine interface 301 and a control unit 302, which are used to control the working states of the liquid inlet pump 201, the liquid inlet flowmeter 202, the solenoid valve 203, the metering buffer cup 204, the three-way solenoid valve 205, the liquid outlet flowmeter 208 and the liquid outlet pump 206, wherein the liquid inlet pump 201 and the liquid outlet pump 206 are both magnetic pumps.

[0025] In the above embodiment, the various components of the present invention are highly integrated in a box, which is easy to install and powered by AC220V. A sewage outlet 4 is provided at the bottom of the device body, which is connected to the liquid storage tank 101. A pure water inlet 5 is provided on one side of the bottom layer of the device body, which is connected to the hot water tank 103. A material outlet 6 is provided on one side of the middle layer of the device body, which is connected to the outlet end of the liquid pump 206.

[0026] In the embodiment of the present invention, a macro camera 207 is also provided on the middle layer of the device body. The macro camera 207 is facing the metering buffer cup 204 and is used to transmit the image information in the metering buffer cup 204 to the human-machine interface 301, so that the operator can visualize the actual metering value of the catalyst during the addition process, so that he can have a clear idea of ​​the value and use it with more confidence.

[0027] In the above embodiment, the human-machine interface 301 establishes a communication connection with the control unit 302. The control unit 302 is provided with a material metering module, a temperature control module, a liquid level control module and an image processing module. Each module is respectively connected to the liquid inlet pump 201, the liquid inlet flow meter 202, the solenoid valve 203, the macro camera 207, the three-way solenoid valve 205, the liquid outlet flow meter 208 and the liquid outlet pump 206. The entire device is compatible with other automatic control systems. The device body can reserve an Ethernet TCP communication interface, a modbus485 communication interface, and an OPC The UA communication interface facilitates the device to be integrated into the DCS control system, realizing full-process automation of the production process, and the material metering module makes material metering more accurate; the temperature control module ensures that the temperature of the hot water tank 103 is constant with the internal ambient temperature of the device, and the user can freely adjust the internal temperature of the device and the hot water control temperature based on the characteristics of the catalyst material. The liquid level control module ensures automatic water replenishment and alarm prompts for the liquid level of the hot water tank 103, and alarm prompts for the liquid level of the catalyst tank 102; the image processing module can accurately observe the actual liquid level in the metering buffer cup 204, making it convenient for operators to remotely and intuitively verify the accuracy of each additive amount in the central control room, stop the system work in time if any problems are found, and ensure that each addition of catalyst is accurate.

[0028] In the above embodiment, the hot water tank 103 arranged at the bottom layer of the device body heats up the components arranged in the middle layer of the device body by radiating temperature, which helps to maintain the internal temperature of the entire device and reduce the energy consumption increased by the operation of the active heating system inside the device.

[0029] In the embodiment of the present invention, a waterproof barrier process is used between the electronic control components arranged on the top layer of the device body and the components arranged on the middle layer to prevent water vapor from the bottom of the device from rising to the top layer and damaging the human-machine interface 301 and the control unit 302.

[0030] The three-way solenoid valve 205 in the embodiment of the present invention is used to switch the catalyst pipeline and the hot water pipeline during each catalyst addition process. Specifically, after the catalyst in the metering buffer cup 204 is completely extracted by the liquid outlet pump 206, the liquid outlet pump 206 injects a certain amount of hot water into the reactor, and the liquid outlet flow meter 208 measures the hot water, thereby ensuring that after each catalyst addition is completed, there is no residual catalyst in the pipeline from the three-way solenoid valve 205, the liquid outlet flow meter 208, the liquid outlet pump 206 to the on-site reactor, which helps to prevent the residual catalyst from crystallizing in this section of the pipeline and the intermediate pipeline components, ensuring that each catalyst addition can be completed reliably.

[0031] In order to further better explain the embodiment of the present application, an adding method of the full-automatic adding device for preventing liquid catalyst from easily crystallizing at low temperature is also provided, which is mainly suitable for the production process of adding liquid catalyst or dissolving catalyst into liquid and then adding, and can also be suitable for the production process of small catalyst dosage and high metering accuracy each time, comprising the following steps:

[0032] Step one: a hot water tank 103 is arranged close to one side of the catalyst tank 102 at the bottom layer of the device main body, for heating the catalyst material;

[0033] Step two: the control unit 302 arranged at the top layer of the device main body controls the working of the liquid inlet pump 201 at the middle layer, so as to extract the catalyst material to the metering buffer cup 204;

[0034] Step three: the micro camera 207 collects the image of the extracted material in the metering buffer cup 204 and uploads it to the man-machine interface 301 for display;

[0035] Step four: the operator observes the material quantity displayed on the man-machine interface 301, controls the control unit 302 according to the extraction quantity, and the control unit 302 can accurately feed by comprehensively controlling the liquid inlet flowmeter 202, the electromagnetic valve 203, the three-way electromagnetic valve 205, the liquid outlet flowmeter 208 and the liquid outlet pump 206. The whole process can be completed by one key of the operator, and the operator only needs to add sufficient catalyst to the raw material barrel according to the process during use. The design of the raw material storage capacity can be adjusted according to the requirements of the user.

[0036] In summary: the full-automatic adding device and method for preventing liquid catalyst from easily crystallizing at low temperature provided by the present application has reasonable device structure layout, the hot water tank 103 is arranged close to one side of the catalyst tank 102, which is beneficial to the heating of the catalyst by the radiation temperature of the hot water tank 103, prevents the catalyst from crystallizing at low temperature, and helps to reduce the energy consumption required by the work of the active heating device in the cabinet; meanwhile, the liquid inlet pump 201, the liquid inlet flowmeter 202, the electromagnetic valve 203, the metering buffer cup 204, the three-way electromagnetic valve 205, the liquid outlet flowmeter 208 and the liquid outlet pump 206 are arranged at the second layer, which is beneficial to the heating of the components at the second layer by the radiation temperature of the hot water tank 103, prevents the catalyst from crystallizing at low temperature in these components and pipelines, and helps to reduce the energy consumption required by the work of the active heating device in the cabinet. The micro camera 207 is also provided in the device, the image information of the metering buffer cup 204 is remotely transmitted to the central control room through the micro camera 207, which helps the operator to intuitively see the catalyst addition quantity each time, plays the purpose of secondary verification, and makes the operator feel at ease.

[0037] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A fully automatic adding device for preventing liquid catalyst from crystallizing at low temperature, characterized in that: The invention comprises a device body, which is divided into three layers from top to bottom. A catalyst tank (102) and a hot water tank (103) are arranged in the bottom layer, the catalyst tank (102) is closely attached to the hot water tank (103), and a liquid accumulation tank (101) is provided at the bottom of the catalyst tank (102) and the hot water tank (103); a liquid inlet pump (201), a liquid inlet flow meter (202), an electromagnetic valve (203), a metering buffer cup (204), a three-way electromagnetic valve (205), a liquid outlet flow meter (208) and a liquid outlet pump (206) are provided in the middle layer of the device body; one end of the liquid inlet pump (201) is connected to the catalyst tank (102) through a pipeline, and the other end is connected to the metering buffer cup (204) through a pipeline; the liquid inlet flow meter (202), the electromagnetic valve (203) The device is installed on a connecting pipeline between a liquid inlet pump (201) and a metering buffer cup (204); the metering buffer cup (204) is also connected to a liquid outlet pump (206) through a pipeline, and a three-way electromagnetic valve (205) and a liquid outlet flow meter (208) are installed on the pipeline; the three-way electromagnetic valve (205) is connected to a hot water tank (103) through a pipeline; a human-machine interface (301) and a control unit (302) are provided on the top layer of the device body, and the human-machine interface (301) and the control unit (302) are used to control the working states of the liquid inlet pump (201), the liquid inlet flow meter (202), the electromagnetic valve (203), the metering buffer cup (204), the three-way electromagnetic valve (205), the liquid outlet flow meter (208) and the liquid outlet pump (206).

2. The fully automatic adding device for preventing liquid catalyst from crystallizing at low temperature according to claim 1, characterized in that: A sewage outlet (4) is provided at the bottom of the device body, and the sewage outlet (4) is communicated with the liquid storage tank (101). A pure water inlet (5) is provided on one side of the bottom layer of the device body, and the pure water inlet (5) is communicated with the hot water tank (103). A material outlet (6) is provided on one side of the middle layer of the device body, and the material outlet (6) is communicated with the outlet end of the liquid discharge pump (206).

3. The fully automatic adding device for preventing liquid catalyst from crystallizing at low temperature according to claim 1, characterized in that: A macro camera (207) is also provided in the middle layer of the device body. The macro camera (207) faces the metering buffer cup (204) and is used to transmit image information in the metering buffer cup (204) to the human-machine interface (301).

4. The fully automatic adding device for preventing liquid catalyst from crystallizing at low temperature according to claim 3, characterized in that: The human-machine interface (301) establishes a communication connection with the control unit (302); the control unit (302) is provided with a material metering module, a temperature control module, a liquid level control module and an image processing module; each module respectively establishes an electrical control connection with the liquid inlet pump (201), the liquid inlet flow meter (202), the solenoid valve (203), the macro camera (207), the three-way solenoid valve (205), the liquid outlet flow meter (208) and the liquid outlet pump (206).

5. The fully automatic adding device for preventing liquid catalyst from crystallizing at low temperature according to claim 1, characterized in that: The hot water tank (103) arranged at the bottom layer of the device body heats up the components arranged in the middle layer of the device body through radiation temperature, so as to prevent the catalyst from crystallizing at low temperature in the components and pipelines.

6. The fully automatic adding device for preventing liquid catalyst from crystallizing at low temperature according to claim 1, characterized in that: A waterproof barrier process is used between the electric control elements arranged on the top layer of the device body and the components arranged on the middle layer.

7. The fully automatic adding device for preventing liquid catalyst from crystallizing at low temperature according to claim 1, characterized in that: The three-way solenoid valve (205) is used to switch between the catalyst pipeline and the hot water pipeline during each catalyst addition process.

8. A method for adding a fully automatic adding device to prevent the liquid catalyst from crystallizing at low temperature as claimed in claim 4, characterized in that: The following steps are involved: Step 1: a hot water tank (103) is placed close to one side of the catalyst tank (102) at the bottom of the device body to heat the catalyst material; Step 2: The control unit (302) provided on the top layer of the device body controls the liquid inlet pump (201) in the middle layer to extract the catalyst material into the metering buffer cup (204); Step 3: The macro camera (207) collects the image of the material extracted from the metering buffer cup (204) and uploads it to the human-machine interface (301) for display; Step 4: The operator observes the material amount displayed on the human-machine interface (301) and controls the control unit (302) according to the extraction amount. The control unit (302) comprehensively controls the liquid inlet flow meter (202), the solenoid valve (203), the three-way solenoid valve (205), the liquid outlet flow meter (208), and the liquid outlet pump (206) to accurately feed the material.

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