Acrylic acid production process auxiliary material automatic preparation device

Abstract

The utility model relates to the technical field of acrylic acid production, and solves the problems of low automation degree and poor production efficiency in the existing solute and solvent adding process. The automatic auxiliary material preparation device for the acrylic acid production process comprises a material preparation system for establishing a foundation for conveying solute and solvent to a preset position and completing preparation, and a material conveying system for establishing a passage for conveying a prepared solution to the preset position; the material preparation system comprises a solute conveying area and a solution preparation area, the solution preparation area comprises a preparation tank and a partition plate which is installed in the preparation tank and used for establishing an upper-layer inner cavity and a lower-layer inner cavity, and the upper-layer inner cavity is communicated with a communicating pipeline for filling solute into the upper-layer inner cavity and a filling pipeline for filling the solvent into the upper-layer inner cavity; and the upper-layer inner cavity and the lower-layer inner cavity are communicated through a liquid conveying pipeline and are connected with an external analyzer.

Description

Technical Field

[0001] This utility model relates to the field of acrylic acid production technology, specifically to an automatic configuration device for auxiliary materials in acrylic acid production processes. Background Technology

[0002] To inhibit polymer generation during acrylic acid production, reduce production consumption per unit, extend the stable operation cycle of the unit, and reduce maintenance costs, it is necessary to add specific polymerization inhibitors.

[0003] The current equipment for preparing auxiliary materials such as polymerization inhibitors is as follows: the preparation tank is a cylindrical vertical tank. To ensure that the concentration of polymerization inhibitor added to the system does not change during the preparation process, a baffle is installed in the middle of the tank, with connecting valves at the top and bottom. Level gauges are installed on both the upper and lower layers. The upper layer is the preparation layer, with a solute inlet, a solvent inlet, a stirrer, and a tail gas collection device at the top. The lower layer is the solution usage layer, equipped with a discharge pump to add the polymerization inhibitor to the system. Currently, the entire process, from solvent filling, preparation calculation, solute addition, stirring and dissolving, to solution dispensing, is entirely manual, resulting in low automation. Furthermore, each preparation cycle is once a day, leading to a huge workload for manual labor. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an automatic preparation device for auxiliary materials in the acrylic acid production process, which solves the problems of low automation and poor production efficiency in the current solute and solvent addition processes.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic preparation device for auxiliary materials in acrylic acid production processes, comprising:

[0006] A material preparation system, which establishes the basis for delivering solutes and solvents to preset locations and completing the preparation;

[0007] A material conveying system that establishes a pathway to deliver the prepared solution to a preset location;

[0008] The material preparation system includes a solute delivery area and a solution preparation area. The solution preparation area includes a dispensing tank and a partition installed inside the dispensing tank to form an upper inner cavity and a lower inner cavity. The upper inner cavity is connected to a connecting pipe for filling the solute and a filling pipe for filling the solvent. The upper inner cavity and the lower inner cavity are connected to an external analyzer through a liquid delivery pipe.

[0009] The material conveying system includes a filter connected to the lower inner cavity for screening the preparation solution and a conveying pump connected to the filter and conveying the preparation solution to a predetermined production location.

[0010] In one embodiment, the solute conveying zone is provided with a screw feeder for conveying solute. The conveying end of the screw feeder is connected to a hopper. The outlet of the hopper is opened at the lower end of the hopper and extends into the upper inner cavity through a conveying pipe. The conveying pipe placed in the upper inner cavity is connected to a filter screen. The conveying pipe and the filter screen constitute a connecting pipe for filling the solute into the upper inner cavity.

[0011] The upper end of the silo is connected to an overflow pipe that draws out exhaust gas, and the overflow pipe has a branch that connects to the upper inner cavity.

[0012] In one embodiment, the upper inner cavity is provided with a stirring rod for mixing the solute and solution, and an air inlet pipe for injecting compressed air into the upper inner cavity extends from the lower end of the stirring rod.

[0013] In one embodiment, level sensors for detecting the liquid level in both the upper and lower inner cavities are installed.

[0014] In one embodiment, a level sensor is installed on the hopper to detect the lowest and highest material levels in the hopper.

[0015] In one embodiment, a connecting valve is installed on the infusion pipeline, a star-shaped discharge valve is installed on the feed pipe, and a filling valve is installed on the filling pipeline.

[0016] Compared with the prior art, this utility model provides an automatic preparation device for auxiliary materials in the acrylic acid production process, which has the following advantages:

[0017] This invention combines the daily configuration needs of acrylic acid production equipment, rationally modifies existing facilities to achieve automated configuration, improve automated control, reduce labor costs, greatly improve work efficiency, reduce the possibility of misoperation, and achieve the goal of improving quality and efficiency.

[0018] The filling valve opens when the liquid level in the upper chamber reaches a preset position. When the liquid level in the upper chamber reaches a set value, the filling valve system automatically opens to begin filling. After filling and solute addition are complete, stirring automatically starts. Stirring stops when the upper solution reaches the target concentration, and the valve connecting the upper and lower chambers automatically opens to complete one dispensing operation. This reduces manual intervention time, automatically adds solute to solvent, increases the degree of automation, and improves work efficiency. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the solute delivery zone and solution preparation zone of this utility model;

[0022] Figure 3 This is a schematic diagram showing the location of the infusion pipeline in the solution preparation area of ​​this utility model;

[0023] Figure 4 This is a schematic diagram of the material conveying system of this utility model.

[0024] In the diagram: 1. Material preparation system; 11. Solute conveying area; 111. Screw feeder; 112. Hopper; 113. Conveying pipe; 114. Filter screen; 115. Overflow pipe; 116. Rotary rotary valve; 12. Solution preparation area; 121. Dosing tank; 122. Upper inner cavity; 123. Lower inner cavity; 124. Connecting pipe; 125. Filling pipe; 126. Liquid conveying pipe; 127. Stirring rod; 128. Air inlet pipe; 129. Liquid level sensor; 2. Material conveying system; 21. Filter; 22. Conveying pump. Detailed Implementation

[0025] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Figures 1-4This is one embodiment of the present invention, addressing the specific problem of the following: Currently, the auxiliary material configuration of the device is a cylindrical vertical tank. To ensure that the concentration of the polymerization inhibitor added during the preparation process remains unchanged, a partition is installed in the middle of the tank, with connecting valves at the top and bottom. Level gauges are installed on both the upper and lower layers. The upper layer is the preparation layer, with a solute inlet, solvent inlet, stirring, and exhaust gas collection device at the top. The lower layer is the solution usage layer, equipped with a discharge pump to add the polymerization inhibitor to the system. Currently, solvent filling, preparation calculation, solute addition, stirring and dissolving, and solution discharge are all purely manual operations, resulting in low automation. Furthermore, each preparation cycle is once a day, leading to a huge workload. To address the problems of low automation and poor production efficiency in the solute and solvent addition processes described above, this solution proposes an automatic preparation device for acrylic acid production process auxiliary materials. This device rationally modifies existing facilities to achieve automated preparation, improve automation control, reduce labor costs, significantly increase work efficiency, reduce the possibility of misoperation, and achieve the goal of improving quality and efficiency.

[0028] This solution describes an automatic preparation device for auxiliary materials in acrylic acid production, which specifically includes a material preparation system 1 and a material conveying system 2. The material preparation system 1 establishes the basis for conveying solute and solvent to a preset location and completing the preparation, while the material conveying system 2 establishes the pathway for conveying the prepared solution to the preset location.

[0029] The material preparation system 1 includes a solute conveying area 11 and a solution preparation area 12. The solution preparation area 12 includes a dispensing tank 121 and a partition installed inside the dispensing tank 121 to form an upper inner cavity 122 and a lower inner cavity 123. The upper inner cavity 122 is connected to a connecting pipe 124 for filling the solute and a filling pipe 125 for filling the solvent. The upper inner cavity 122 and the lower inner cavity 123 are connected to an external analyzer via a liquid delivery pipe 126. In this embodiment, the solute conveying area 11 is equipped with a screw conveyor 111 for conveying the solute. The conveying end of the screw conveyor 111 is connected to a hopper 112. The solute is transferred to the screw conveyor feeding position by a forklift. 11. The solute is conveyed to the silo 112 for later use. The outlet of the silo 112 is located at the lower end of the silo 112 and extends into the upper inner cavity 122 through the conveying pipe 113. The conveying pipe 113 in the upper inner cavity 122 is connected to the filter screen 114. The conveying pipe 113 and the filter screen 114 constitute a connecting pipe 124 for filling the solute into the upper inner cavity 122. The upper end of the silo 112 is connected to the overflow pipe 115 for drawing out exhaust gas. The overflow pipe 115 has a branch connecting to the upper inner cavity 122. The upper inner cavity 122 is equipped with a stirring rod 127 for mixing the solute and solution. The lower end of the stirring rod 127 extends into the upper inner cavity 122 and is connected to an air inlet pipe 128 for injecting compressed air into the upper inner cavity 122. Once the filling and solute addition are complete, the stirring system automatically starts. Simultaneously, the compressed air regulating valve automatically opens, introducing a certain amount of compressed air into the preparation tank 121. This not only facilitates the mixing of the polymerization inhibitor solution but also promotes the high polymerization inhibition effect of the aerobic type. The compressed air flow rate can be monitored and controlled using a rotor flow meter. Level sensors 129 are installed in both the inner cavity and the lower inner cavity 123 to detect the liquid levels in the upper inner cavity 122 and the lower inner chamber. When the upper liquid level reaches the set value, the filling valve system automatically opens to begin filling; when the upper liquid level reaches the set value again, the connecting valve automatically closes.

[0030] The material conveying system 2 includes a filter 21 connected to the lower inner cavity 123 for screening the prepared solution, and a conveying pump 22 connected to the filter 21 and conveying the prepared solution to a predetermined production location. A level sensor is installed on the silo 112 to detect the minimum and maximum material levels in the silo 112. A connecting valve is installed on the liquid delivery pipe 126, and a star-shaped discharge valve 116 is installed on the material delivery pipe 113. A core discharge valve is installed at the bottom of the silo 112 to ensure the filling port is sealed. According to production needs, the amount of material added downwards from the silo 112 is controlled by the star-shaped discharge valve 116. A filling valve is installed on the filling pipe 125. The filling valve opens when the liquid level in the upper inner cavity 122 reaches a preset position. When the liquid level in the upper inner cavity 122 reaches a set value, the filling valve automatically opens, and the system begins filling. Once the filling and solute addition are complete, the stirring will start automatically. Stirring will stop once the upper solution reaches the target concentration, and the valve connecting the upper and lower layers will open automatically to complete one preparation operation. This reduces the time required for manual intervention, and the automatic addition of solute to solvent increases the degree of automation and improves work efficiency.

[0031] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0032] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic mixing device for auxiliary materials in acrylic acid production process, characterized in that, include: The material preparation system (1) establishes the basis for delivering solutes and solvents to preset locations and completing the preparation; Material conveying system (2), which establishes a pathway to deliver the prepared solution to a preset location; The material preparation system (1) includes a solute delivery area (11) and a solution preparation area (12). The solution preparation area (12) includes a dispensing tank (121) and a partition installed in the dispensing tank (121) to form an upper inner cavity (122) and a lower inner cavity (123). The upper inner cavity (122) is connected to a connecting pipe (124) for filling the solute into it and a filling pipe (125) for filling the solvent into it. The upper inner cavity (122) and the lower inner cavity (123) are connected to an external analyzer through a liquid delivery pipe (126). The material conveying system (2) includes a filter (21) connected to the lower inner cavity (123) for screening the preparation solution and a conveying pump (22) connected to the filter (21) and conveying the preparation solution to a predetermined production location.

2. The automatic mixing device for auxiliary materials in acrylic acid production process according to claim 1, characterized in that: The solute conveying zone (11) is equipped with a screw feeder (111) for conveying solute. The conveying end of the screw feeder (111) is connected to a hopper (112). The outlet of the hopper (112) is opened at the lower end of the hopper (112) and extends into the upper inner cavity (122) through a conveying pipe (113). The conveying pipe (113) placed in the upper inner cavity (122) is connected to a filter screen (114). The conveying pipe (113) and the filter screen (114) constitute a connecting pipe (124) for filling the solute into the upper inner cavity (122). The upper end of the hopper (112) is connected to an overflow pipe (115) for drawing out exhaust gas, and the overflow pipe (115) is provided with a branch that connects to the upper inner cavity (122).

3. The automatic mixing device for auxiliary materials in acrylic acid production process according to claim 1, characterized in that: The upper inner cavity (122) is provided with a stirring rod (127) for mixing solute and solution, and an air inlet pipe (128) for injecting compressed air into the upper inner cavity (122) extends from the lower end of the stirring rod (127).

4. The automatic mixing device for auxiliary materials in acrylic acid production process according to claim 3, characterized in that: Both the upper inner cavity (122) and the lower inner cavity (123) are equipped with level sensors (129) for detecting the liquid level in the upper inner cavity (122) and the lower inner cavity.

5. The automatic mixing device for auxiliary materials in acrylic acid production process according to claim 2, characterized in that: The hopper (112) is equipped with a level sensor to detect the lowest and highest material levels in the hopper (112).

6. The automatic mixing device for auxiliary materials in acrylic acid production process according to claim 1, characterized in that: A connecting valve is installed on the infusion pipeline (126), a star-shaped discharge valve (116) is installed on the feed pipe (113), and a filling valve is installed on the filling pipeline (125).

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