An EOD production line feeding device

Abstract

The utility model belongs to the technical field of chemical production equipment, especially, relate to a kind of EOD production line feeding device, including pre-treatment kettle, kettle top connects kettle top feed line, kettle top feed line is equipped with pneumatic regulating valve and mass flowmeter, connects kettle top purge line;First feed line is connected with kettle top feed line, is equipped with first feed pump, connects first nitrogen tank;Feed group is connected with kettle top feed line, is equipped with feed pump, including second, third, fourth feed line arranged side by side, all are equipped with feed valve group;Feed purge line is connected with feed group, feed purge line connects feed nitrogen tank, is equipped with purge cut-off valve and purge check valve;Kettle purge line is connected with the kettle top of pre-treatment kettle, connects kettle nitrogen tank.It has the advantages of automatic feeding, high feeding efficiency, low safety hazard, and can prevent different media from mutual stringing, improve product quality.

Description

Technical Field

[0001] This utility model belongs to the field of chemical production equipment technology, and in particular relates to a feeding device for an EOD production line. Background Technology

[0002] Currently, in EOD (ethylene oxide derivatives) production lines, raw material loading is done manually. This involves using bulk containers to transfer raw materials from the tank area, followed by pumping the raw materials into the pretreatment reactor using a fixed pump. The main problems are: high operator workload, low efficiency, and safety hazards associated with manual material handling.

[0003] To address this practical difficulty, it is necessary to improve the feeding device of the EOD production line in order to improve feeding efficiency, reduce safety hazards, and enhance the quality of the production line. Utility Model Content

[0004] This utility model provides an EOD production line feeding device that automatically feeds materials, has high feeding efficiency, low safety risks, and can prevent cross-contamination between different media, thereby improving product quality.

[0005] The technical solution of this utility model includes: an EOD production line feeding device, comprising: a pretreatment vessel, the top of which is connected to a top feeding pipeline, the top feeding pipeline being equipped with a pneumatic regulating valve and a mass flow meter, and the top feeding pipeline being connected to a top purging pipeline; a first feeding pipeline connected to the top feeding pipeline, the first feeding pipeline being equipped with a first feeding pump, and the first feeding pipeline being connected to a first nitrogen tank; and a feeding group connected to the top feeding pipeline. The feeding group is equipped with a feeding pump. The feeding group includes a second feeding pipeline, a third feeding pipeline, and a fourth feeding pipeline arranged in parallel. Each of the second, third, and fourth feeding pipelines is equipped with a feeding valve group. A feeding purging pipeline is connected to the feeding group and is connected to a feeding nitrogen tank. The feeding purging pipeline is equipped with a purging shut-off valve and a purging check valve. A reactor purging pipeline is connected to the top of the pretreatment reactor and is connected to a reactor nitrogen tank.

[0006] Preferably, the feed valve assembly includes a ball valve, a shut-off valve, and a check valve.

[0007] Preferably, the feeding group further includes a feeding main pipe, which is connected to the end of the second feeding pipeline, the end of the third feeding pipeline and the end of the fourth feeding pipeline.

[0008] Preferably, the feed purging pipeline is connected to the beginning of the feed main pipe, and the end of the feed main pipe is connected to the feed pipeline at the top of the vessel.

[0009] Preferably, both the second and third feed lines are provided with a slope, which is minimized near the ends of the second and third feed lines.

[0010] Preferably, the first feed line has a slope, which is minimized near the connection point with the feed line to the top of the vessel.

[0011] Preferably, the feed line at the top of the vessel is sloped, with the slope being minimum near the connection point with the first feed line.

[0012] Preferably, the first feed line is connected to a drain port.

[0013] Preferably, the top of the pretreatment vessel is connected to an venting pipeline, and the pretreatment vessel is equipped with a pressure gauge and a level gauge.

[0014] Preferably, the pretreatment vessel is equipped with a stirring shaft, the stirring shaft is connected to a stirring motor, the stirring motor is located outside the pretreatment vessel, and the pretreatment vessel is equipped with a thermometer.

[0015] The beneficial effects of this utility model are as follows: By designing a first feeding pipeline and a feeding group, and designing a first feeding pump in the first feeding pipeline and a feeding pump in the feeding group, automatic feeding can be achieved, avoiding the low efficiency and safety hazards caused by manual feeding; and by designing a second, third, and fourth feeding pipeline arranged in parallel in the feeding group, independent pipeline feeding of multiple raw materials can be achieved; at the same time, a reactor purging pipeline is designed at the top of the reactor, which can purge the material in the pretreatment reactor with nitrogen after the reaction is completed, and a first nitrogen pump is designed in the first feeding pipeline. The gas tank can purge the material supplied in the first feeding pipeline with nitrogen after feeding is completed. The feeding group is designed with a feeding purging pipeline, which can purge the material conveyed in each feeding pipeline in the feeding group with nitrogen after feeding is completed. At the same time, a top purging pipeline is also designed on the top feeding pipeline, which can purge the material remaining in the top feeding pipeline with nitrogen. By using nitrogen purging at multiple pipelines, and with the valves designed in the pipeline, it can be ensured that the material supplied by the entire feeding device is independent, avoiding cross-contamination of different media and affecting the final product quality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an embodiment.

[0018] in: 1. Pretreatment vessel; 11. Stirring motor; 12. Drainage pipeline; 13. Pressure gauge; 14. Level gauge; 15. Vessel purging pipeline; 151. Vessel nitrogen tank; 2. First feed pipeline; 21. First nitrogen tank; 22. Drain port; 23. First feed pump; 3. Second feed pipeline; 4. Third feed pipeline; 5. Fourth feed pipeline; 6. Feed valve assembly; 61. Ball valve; 62. Shut-off valve; 63. Check valve; 7. Feed purging pipeline; 71. Feed nitrogen tank; 72. Purge shut-off valve; 73. Purge check valve; 8. Vessel top feed pipeline; 81. Vessel top purging pipeline; 82. Pneumatic regulating valve; 83. Mass flow meter; 9. Feed pump. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] In this document, terms such as "above," "below," "left," "right," "inner," and "outer" are established based on the positional relationships shown in the accompanying drawings. Depending on the drawings, these positional relationships may change; therefore, they should not be construed as absolute limitations on the scope of protection. Furthermore, relational terms such as "first" and "second" are merely used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components. In addition, in embodiments of this utility model, "above," "below," etc., include the stated number.

[0021] Reference Figure 1 The EOD production line feeding device in this embodiment includes a pretreatment vessel 1, into which various raw materials supplied by the feeding device enter for reaction. Figure 1 In the diagram, only the top part of the pretreatment vessel 1 is shown.

[0022] The top of the pretreatment vessel 1 is connected to a top feed line 8. This top feed line 8 is equipped with a pneumatic regulating valve 82 and a mass flow meter 83. The pneumatic regulating valve 82 can be used to adjust the opening, closing, and opening degree of the top feed line 8. The mass flow meter 83 can measure the raw material flowing through the top feed line 8 to achieve precise control of the feeding. For example, the flow rate value detected by the mass flow meter 83 is fed back to the control system. When the detected flow rate value reaches the set value, the control system controls the valve to take corresponding actions. The top feed line 8 is connected to a top purging line 81. Specifically, the top purging line 81 is filled with nitrogen to purge the raw material remaining in the top feed line 8.

[0023] The first feed line 2 is connected to the top feed line 8, thereby adding the raw materials supplied in the first feed line 2 into the pretreatment vessel 1 through the top feed line 8. The specific type of raw material supplied in the first feed line 2 can be selected and adjusted according to the specific EOD product, which will not be elaborated here. The first feed line 2 is equipped with a first feed pump 23, which enables automatic material feeding, avoiding the inefficiency and safety hazards of manual feeding. A first nitrogen tank 21 is connected to the first feed line 2. After feeding is completed, the nitrogen in the first nitrogen tank 21 is used to purge the first feed line 2.

[0024] The feeding group is connected to the top feeding pipeline 8. A feeding pump 9 is installed in the feeding group to automatically feed raw materials, avoiding the inefficiency and safety hazards of manual feeding. In this embodiment, the feeding group includes a second feeding pipeline 3, a third feeding pipeline 4, and a fourth feeding pipeline 5 arranged in parallel. These three parallel feeding pipelines can automatically feed various raw materials to meet the production needs of multiple EOD products and improve the equipment's applicability. Specifically, each of the second feeding pipeline 3, the third feeding pipeline 4, and the fourth feeding pipeline 5 is equipped with a feeding pump 9, and each of these pipelines is equipped with a feeding valve group 6. The feeding valve group 6 is used to adjust the opening, closing, and opening degree of the pipelines. Specifically, the feeding valve group 6 can be an automatic valve; that is, the switching of the feeding valve group 6 can be controlled by the control system of the entire production equipment, for example, controlled in the central control room of the equipment, such as using a DCS control system.

[0025] The feed purging line 7 is connected to the feed assembly, so that after each line of the feed assembly has finished feeding, each line is purged with nitrogen. The feed purging line 7 is connected to a feed nitrogen tank 71 to provide purging nitrogen. The feed purging line 7 is equipped with a purging shut-off valve 72 and a purging check valve 73. By using the cooperation of the two valves and the feed nitrogen tank 71, cross-contamination between different media in each line is prevented, thereby improving the quality of the final product.

[0026] The purging line 15 is connected to the top of the pretreatment vessel 1. The purging line 15 is connected to the nitrogen tank 151 to provide the nitrogen required for purging, so that the material in the pretreatment vessel 1 is purged with nitrogen after the reaction in the pretreatment vessel 1 is completed.

[0027] Specifically, the feed valve assembly 6 includes a ball valve 61, a shut-off valve 62, and a check valve 63. The ball valve 61 and the shut-off valve 62 are used to open, close, and adjust the opening degree of each pipeline. The check valve 63 is used in conjunction with nitrogen purging to prevent cross-contamination between different media.

[0028] The feeding assembly also includes a main feeding pipe, which is connected to the ends of the second feeding line 3, the third feeding line 4, and the fourth feeding line 5. The ends of the second feeding line 3, the third feeding line 4, and the fourth feeding line 5 are located near the raw material outlets of their respective lines. Thus, the material supplied from each line, driven by the feeding pump 9, first enters the main feeding pipe from its end, and then enters the top feeding line 8.

[0029] The feed purging line 7 is connected to the beginning of the feed main pipe, and the end of the feed main pipe is connected to the top feed line 8. In this way, the feed purging line 7 is used to purge the front ends of each line in the feed group with nitrogen, and the top purge line 81 is used to purge the ends of the lines with nitrogen, so as to achieve full nitrogen purging of the feed lines and avoid material residue in the pipeline sections that may affect the final product quality.

[0030] Specifically, both the second feeding pipeline 3 and the third feeding pipeline 4 are provided with a slope, which is the smallest near the end of the second feeding pipeline 3 and the third feeding pipeline 4, in order to improve the smooth conveying of raw materials in the pipeline, especially suitable for conveying certain raw materials with poor flowability.

[0031] Similarly, the first feed line 2 is sloped, with the slope being smallest near its connection with the top feed line 8, to improve the smooth flow of raw materials within the first feed line 2. The top feed line 8 is also sloped, with the slope being smallest near its connection with the first feed line 2, to improve the smooth flow of raw materials from the first feed line 2 into the top feed line 8, and to prevent raw materials from remaining at the connection point of the two lines and causing blockages.

[0032] The first feed line 2 is connected to a drain port 22, through which the raw materials can be drained. The top of the pretreatment vessel 1 is connected to a drain line 12, which empties the pretreatment vessel 1 before feeding, reducing the pressure to atmospheric pressure. The pretreatment vessel 1 is equipped with a pressure gauge 13 and a level gauge 14. The pressure gauge 13 is used to detect the pressure inside the pretreatment vessel 1, and the level gauge 14 is used to detect the liquid level of the raw materials added to the pretreatment vessel 1. The pretreatment vessel 1 is also equipped with a stirring shaft connected to a stirring motor 11, which is located outside the pretreatment vessel 1. The driving force of the stirring motor 11 drives the stirring shaft to stir the raw materials added to the pretreatment vessel 1. The pretreatment vessel 1 is also equipped with a thermometer to monitor the temperature inside the vessel.

[0033] The specific usage process of the EOD production line feeding device in this embodiment is as follows (taking the feeding of material from the second feeding pipeline 2 to the pretreatment tank 1 as an example): First, the mass flow meter 83 is set according to the amount of raw materials required for production. Then, in the DCS control system, when the cumulative value of the mass flow meter reaches the set value, the shut-off valve 62 of the second feed line 3 and the pneumatic regulating valve 82 are closed.

[0034] Next, check whether the feed pump 9 of the second feed line 3 is normal, check whether the liquid level meets the usage conditions, and check whether the corresponding raw material storage tank and feed pump 9 pipeline valves are correctly opened and closed; open the top vent valve of the pretreatment vessel 1 to release the pressure to atmospheric pressure.

[0035] Next, start the feed pump 9 of the second feed line 3, and adjust the pump outlet valve opening until the pump pressure reaches the normal operating pressure; confirm that the shut-off valves 62 of the third feed line 4 and the fourth feed line 5 are closed, open the ball valve 61 and shut-off valve 62 of the second feed line 3, and open the feed regulating valve and shut-off valve of the pretreatment vessel 1. The pretreatment vessel 1 will then begin feeding. During the feeding process, monitor whether the liquid level in the pretreatment vessel 1 rises normally, whether the feed flow rate is normal, and whether the feed pump is operating normally. If abnormal fluctuations in liquid level or flow rate, or abnormal pump operation occur, troubleshooting and handling should be carried out promptly.

[0036] Finally, when the cumulative flow value of the mass flow meter 83 reaches the set value, the control system closes the shut-off valve 62 and pneumatic regulating valve 82 of the second feed line 3, and manually stops the feed pump 9. The purge shut-off valve 72 and the top purge line 81 are opened to purge the feed line with nitrogen. After purging, the nitrogen is shut off, the feed valve is closed, and the vent valve of the pretreatment vessel 1 is closed. The rising liquid level in the pretreatment vessel 1 and the falling liquid level in the raw material storage tank are checked; if the checks are correct, the feeding is complete.

[0037] Where the embodiments do not contradict each other, at least some of the technical solutions in each embodiment can be recombine to form the essential technical solution of this utility model. Of course, the embodiments can also reference or include each other. Furthermore, it should be noted that adaptive adjustments and modifications made by those skilled in the art when recombinating the technical means described in the embodiments will also fall within the protection scope of this utility model.

[0038] The technical principles of this utility model have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. A feeding device for an EOD production line, characterized in that, include: A pretreatment vessel (1) is connected to a top feed line (8) at the top of the pretreatment vessel (1). The top feed line (8) is equipped with a pneumatic regulating valve (82) and a mass flow meter (83). The top feed line (8) is connected to a top purging line (81). The first feed line (2) is connected to the top feed line (8) of the reactor. The first feed line (2) is equipped with a first feed pump (23) and a first nitrogen tank (21) is connected to the first feed line (2). The feeding group is connected to the top feeding pipeline (8) of the reactor. The feeding group is equipped with a feeding pump (9). The feeding group includes a second feeding pipeline (3), a third feeding pipeline (4) and a fourth feeding pipeline (5) arranged in parallel. The second feeding pipeline (3), the third feeding pipeline (4) and the fourth feeding pipeline (5) are all equipped with a feeding valve group (6). The feed purging line (7) is connected to the feed group. The feed purging line (7) is connected to a feed nitrogen tank (71). The feed purging line (7) is equipped with a purging shut-off valve (72) and a purging check valve (73). The purging line (15) is connected to the top of the pretreatment vessel (1), and the purging line (15) is connected to a nitrogen tank (151).

2. The EOD production line feeding device according to claim 1, characterized in that: The feed valve assembly (6) includes a ball valve (61), a shut-off valve (62), and a check valve (63).

3. The EOD production line feeding device according to claim 1, characterized in that: The feeding group also includes a feeding main pipe, which is connected to the end of the second feeding line (3), the end of the third feeding line (4), and the end of the fourth feeding line (5).

4. The EOD production line feeding device according to claim 3, characterized in that: The feed purging line (7) is connected to the beginning of the feed main pipe, and the end of the feed main pipe is connected to the top feed line (8).

5. The EOD production line feeding device according to claim 1, characterized in that: Both the second feed line (3) and the third feed line (4) are provided with a slope, which is the smallest near the end of the second feed line (3) and the third feed line (4).

6. The EOD production line feeding device according to claim 5, characterized in that: The first feed line (2) has a slope, which is minimized near the connection with the feed line (8) at the top of the vessel.

7. The EOD production line feeding device according to claim 6, characterized in that: The feed line (8) at the top of the vessel is sloped, and the slope is minimized near the connection with the first feed line (2).

8. The EOD production line feeding device according to claim 1, characterized in that: The first feed line (2) is connected to a drain port (22).

9. The EOD production line feeding device according to claim 1, characterized in that: The top of the pretreatment vessel (1) is connected to an venting pipeline (12), and the pretreatment vessel (1) is equipped with a pressure gauge (13) and a level gauge (14).

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