Ethylene oxide sphere safety control system

Abstract

This utility model belongs to the technical field of ethylene oxide industrial equipment, and particularly relates to a safety control system for ethylene oxide spherical tanks. It includes a spherical tank group, with a feed pipeline connected to its feed end and a discharge pipeline connected to its discharge end. A large circulation pipeline is provided between the discharge pipeline and the feed pipeline. The system also includes at least two parallel ethylene oxide spherical tanks. At least the large circulation pipeline is equipped with a valve group, which includes manual valves and automatic valves, and a fireproof cover protecting the manual and automatic valves. The control module includes a remote control room and a field operation column, both connected to the valve group. The distance between the field operation column and the spherical tank group is less than the distance between the remote control room and the spherical tank group. This system has the advantage of combining on-site and remote control, ensuring safety in special circumstances such as fires.

Description

Technical Field

[0001] This utility model belongs to the technical field of ethylene oxide industrial equipment, and in particular relates to a safety control system for ethylene oxide spherical tanks. Background Technology

[0002] Traditional ethylene oxide (EO) spherical tank loading and unloading operations mainly rely on operators working on-site at the tank. This poses safety hazards due to prolonged exposure of operators to the ethylene oxide environment. Furthermore, on-site operations by operators are subject to response delays, and the delayed on-site handling, especially in the event of sudden malfunctions, also presents significant safety risks.

[0003] Based on the above shortcomings, some have proposed using remote control for the feeding and discharging of ethylene oxide spherical tanks. However, after actually implementing remote control, the following problems have been found: First, most current remote control systems for ethylene oxide spherical tanks rely solely on remote control, meaning that operators cannot manually intervene on-site. If the remote control system malfunctions, the inability to intervene manually on-site poses a significant safety hazard. Second, current remote control systems typically only consider the operational needs of routine work scenarios, lacking corresponding solutions for responding to and handling special situations, such as fire scenarios.

[0004] Based on the aforementioned shortcomings of the ethylene oxide remote control system, how to improve it has become an urgent problem to be solved. Utility Model Content

[0005] This utility model provides a safety control system for ethylene oxide spherical tanks, which combines on-site and remote control and can ensure safety in special circumstances such as fires.

[0006] The technical solution of this utility model includes: a safety control system for ethylene oxide spherical tanks, comprising: a spherical tank group, wherein the feeding end of the spherical tank group is connected to a feeding pipeline, the unloading end of the spherical tank group is connected to an unloading pipeline, a large circulation pipeline is provided between the unloading pipeline and the feeding pipeline, and the spherical tank group includes at least two ethylene oxide spherical tanks arranged in parallel; a valve group, wherein at least the large circulation pipeline is provided with the valve group, the valve group includes a manual valve and an automatic valve, and a fireproof cover is provided outside the manual valve and the automatic valve; and a control module, wherein the control module includes a remote control room and a field operation column, the field operation column and the remote control room are connected to the valve group, and the distance between the field operation column and the spherical tank group is less than the distance between the remote control room and the spherical tank group.

[0007] Preferably, the inlet end of the ethylene oxide spherical tank is connected to an inlet pipeline, the outlet end of the ethylene oxide spherical tank is connected to an outlet pipeline, and a small circulation pipeline is provided between the inlet pipeline and the outlet pipeline.

[0008] Preferably, the small circulation pipeline is equipped with a valve group, which is connected to the field operation column and the remote control room.

[0009] Preferably, the small circulation pipeline is equipped with a small circulation pump and a cooler, and the cooler contains a cooling medium to cool the ethylene oxide in the ethylene oxide spherical tank.

[0010] Preferably, the feed line is connected to the material supply line, and the discharge line is connected to the large circulation line.

[0011] Preferably, the feed pipeline is equipped with a valve assembly, which is connected to the remote control room and the field operation column.

[0012] Preferably, the large circulation pipeline is equipped with a large circulation pump, which is located near the connection between the unloading pipeline and the large circulation pipeline.

[0013] Preferably, the large circulation pipeline is equipped with valve groups both upstream and downstream of the large circulation pump.

[0014] Preferably, the fireproof cover is a rigid fireproof cover or a flexible fireproof cover, and the manual valve includes an operating handwheel.

[0015] The beneficial effects of this utility model are as follows: By designing a remote control room and a local operation column in the control module, in addition to operation via the remote control room (which is farther away), operation can also be performed via the local operation column (which is closer away), achieving a combination of remote control and local operation. This provides more options for the operation of the ethylene oxide spherical tank, thereby improving the guarantee of operational safety. Furthermore, the design of manual and automatic valves allows for both manual and automatic operation. Besides controlling the automatic valves via the control module to achieve automatic opening and closing of pipelines and adjustment of opening size, manual valves can also be used for manual operation, avoiding the safety hazard of being unable to intervene manually when the control module fails or malfunctions. Additionally, fireproof covers are installed around the manual and automatic valves, and the three are designed as a modular structure for the valve assembly. This facilitates modular manufacturing and installation in the pipelines of the safety control system. Moreover, the fireproof covers ensure equipment safety in special circumstances such as fires, preventing secondary leakage caused by high-temperature damage to the valve structure, and improving the overall safety of the ethylene oxide spherical tank system. 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:

[0019] 1. Ethylene oxide spherical tank; 11. Feed pipeline; 12. Discharge pipeline; 13. Small circulation pipeline; 131. Small circulation pump; 132. Cooler; 14. Large circulation pipeline; 141. Large circulation pump.

[0020] 2. Valve assembly; 21. Manual valve; 22. Automatic valve; 23. Fireproof cover;

[0021] 100. Remote control room; 200. On-site operation column; 300. Material supply pipeline; 400. Material discharge pipeline. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] The ethylene oxide spherical tank safety control system of this embodiment is mainly proposed to address the shortcomings of existing ethylene oxide spherical tank systems that rely entirely on remote control.

[0025] Reference Figure 1 The ethylene oxide spherical tank safety control system of this embodiment includes: a spherical tank group, the feeding end of which is connected to a feeding pipeline 300, and the unloading end of which is connected to a unloading pipeline 400. Ethylene oxide is added to the spherical tank group for storage through the feeding pipeline 300. When production requires it, the ethylene oxide in the spherical tank group is supplied externally through the unloading pipeline 400, for example, to the required equipment or transport vehicle. A large circulation pipeline 14 is provided between the unloading pipeline 400 and the feeding pipeline 300. The advantage of designing the large circulation pipeline 14 is that when the amount of ethylene oxide discharged from the spherical tank group exceeds the required amount, it can be returned to the spherical tank group for storage through the large circulation pipeline 14, so as to achieve precise control of the amount of ethylene oxide used. On the one hand, it can reduce the loss of ethylene oxide, and on the other hand, it can reduce the risk of ethylene oxide leakage to the outside, thereby improving the safety of the entire system.

[0026] In this embodiment, the spherical tank group includes at least two ethylene oxide spherical tanks 1 arranged side by side. Integrating multiple ethylene oxide spherical tanks 1 into one system can improve the system's ethylene oxide storage capacity. (Refer to...) Figure 1 In the example given, the spherical tank group has three ethylene oxide spherical tanks 1 arranged side by side. It should be noted that this number is only an example and can be adjusted according to the production scale.

[0027] Valve assembly 2 is installed at least in the main circulation pipeline 14. Valve assembly 2 is used to open and close the main circulation pipeline 14 and adjust the amount of ethylene oxide flowing within it, i.e., to adjust the opening degree. Valve assembly 2 includes a manual valve 21 and an automatic valve 22, as well as a fireproof cover 23 covering the manual valve 21 and the automatic valve 22. Thus, the manual valve 21 can be manually operated by the operator, and the automatic valve 22 can be automatically controlled by the control module, achieving a combination of manual and automatic operation. This avoids the safety hazards and insufficient responsiveness issues of relying solely on the control module in case of malfunction. Furthermore, the fireproof cover 23 on the manual valve 21 and the automatic valve 22 improves the reliability of the two valves in a fire environment, preventing secondary leakage caused by high-temperature damage, and improving the safety and reliability of the system. Moreover, designing all three components as a modular structure for valve assembly 2 facilitates modular manufacturing and installation in various pipelines of this safety control system, reducing costs and installation time.

[0028] The control module includes a remote control room 100 and a local operating column 200. Both the local operating column 200 and the remote control room 100 are connected to the valve group 2. Furthermore, the distance between the local operating column 200 and the spherical tank group is less than the distance between the remote control room 100 and the spherical tank group. Thus, in addition to operation via the more distant remote control room 100, operation can also be performed via the closer local operating column 200, achieving a combination of remote control and local operation. This provides more options for operating the ethylene oxide spherical tank 1, thereby improving the system's operational safety.

[0029] Reference Figure 1 The ethylene oxide spherical tank 1 has a feed line 11 connected to its inlet end and a discharge line 12 connected to its outlet end. A small circulation line 13 is provided between the feed line 11 and the discharge line 12. The advantage of designing the small circulation line 13 is that if the storage conditions of ethylene oxide in the ethylene oxide spherical tank 1 do not meet the requirements, such as if its temperature is too high, it can enter the small circulation line 13 from the discharge line 12, be treated to meet the conditions, and then enter the ethylene oxide spherical tank 1 from the feed line 11 for storage, thus avoiding safety hazards caused by abnormal storage.

[0030] Specifically, the small circulation pipeline 13 is equipped with a valve assembly 2, which consists of a manual valve 21, an automatic valve 22, and an external fireproof cover 23. Unless otherwise specified in the subsequent description of this embodiment, the valve assembly 2 adopts this structure and will not be repeated hereafter. The valve assembly 2 is connected to the field operation column 200 and the remote control room 100. By designing the valve assembly 2 in the small circulation pipeline 13, the precise control of the amount of ethylene oxide flowing within it can be improved. Furthermore, in the event of an emergency, the valve assembly 2 can be used for emergency shut-off to avoid the safety hazard of ethylene oxide leakage.

[0031] The small circulation pipeline 13 is equipped with a small circulation pump 131 and a cooler 132. The cooler 132 contains a cooling medium to cool the ethylene oxide in the ethylene oxide spherical tank 1. Using this cooling medium, the ethylene oxide flowing out of the ethylene oxide spherical tank 1 to the cooler 132 can be cooled down. After being cooled to the storage temperature, it re-enters the ethylene oxide spherical tank 1 for storage under the drive of the small circulation pump 131.

[0032] In this embodiment, the inlet pipeline 11 is connected to the feed pipeline 300, and the outlet pipeline 12 is connected to the large circulation pipeline 14. That is, ethylene oxide supplied from the feed pipeline 300 enters each ethylene oxide spherical tank 1 via the inlet pipeline 11. When it needs to be supplied externally, the ethylene oxide in the ethylene oxide spherical tank 1 flows out from the outlet pipeline 12, first entering the large circulation pipeline 14, and then the required amount of ethylene oxide is discharged from the discharge pipeline 400. If the amount of ethylene oxide discharged from the ethylene oxide spherical tank 1 is greater than the required amount, it then enters the ethylene oxide spherical tank 1 again via the large circulation pipeline 14, the feed pipeline 300, and the inlet pipeline 11. The advantage of this design is that some pipelines can be shared, and the number of interfaces in the ethylene oxide spherical tank 1 can be reduced, thus reducing the risk of ethylene oxide leakage from the interfaces.

[0033] The feed line 11 is equipped with a valve group 2, which is connected to the remote control room 100 and the field operation column 200. The remote control room 100 and the field operation column 200 are used to achieve dual control, which improves safety. In addition, the valve group 2 designed in the feed line 11 can accurately control the amount of ethylene oxide in each ethylene oxide spherical tank 1.

[0034] Specifically, the large circulation pipeline 14 is equipped with a large circulation pump 141, which is located near the connection between the discharge pipeline 400 and the large circulation pipeline 14. This is to improve the flowability of ethylene oxide under the drive of the large circulation pump 141. Furthermore, placing the large circulation pump 141 near the discharge pipeline 400 prevents a decrease in the flow force of ethylene oxide near the end of the pipeline, ensuring that all ethylene oxide in the pipeline is discharged, thus avoiding any safety hazards caused by its residue within the pipeline.

[0035] In this embodiment, valve assemblies 2 are provided upstream and downstream of the large circulation pipeline 14. The fireproof cover 23 is a rigid fireproof cover or a flexible fireproof cover, and the manual valve 21 includes an operating handwheel.

[0036] The ethylene oxide spherical tank safety control system of this embodiment adopts a three-level protection system of remote control, local operation, and manual emergency response, avoiding the safety hazards of existing single remote control and achieving a comprehensive improvement in safety and efficiency. By designing both a manual valve 21 and an automatic valve 22 in valve group 2, operators can directly close the valve via manual valve 21 in the event of control module failure or interlocking malfunction, solving the problem of insufficient emergency response capability caused by the single control mode in existing systems, and reducing the risk of operation delay under extreme conditions by more than 90%. Simultaneously, the fireproof cover 23 designed outside the manual valve 21 and automatic valve 22 in valve group 2 improves reliability in fire environments and effectively avoids secondary leakage caused by high-temperature damage. Furthermore, the control module simultaneously designs a remote control room 100 and a local operation column 200 to control valve group 2, supporting a dual operation mode of remote command from the central control room and local one-button shut-off. Finally, the modular design of valve group 2 reduces the cost and time required to modify existing systems.

[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 safety control system for an ethylene oxide spherical tank, characterized in that, include: The spherical tank group has a feeding end connected to a feeding pipeline (300) and a discharging end connected to a discharging pipeline (400). A large circulation pipeline (14) is provided between the discharging pipeline (400) and the feeding pipeline (300). The spherical tank group includes at least two ethylene oxide spherical tanks (1) arranged in parallel. Valve assembly (2), at least the large circulation pipeline (14) is provided with the valve assembly (2), the valve assembly (2) includes a manual valve (21) and an automatic valve (22), and a fireproof cover (23) covering the manual valve (21) and the automatic valve (22). The control module includes a remote control room (100) and a field operation column (200). The field operation column (200) and the remote control room (100) are connected to the valve group (2). The distance between the field operation column (200) and the spherical tank group is less than the distance between the remote control room (100) and the spherical tank group.

2. The safety control system for an ethylene oxide spherical tank according to claim 1, characterized in that: The feed end of the ethylene oxide spherical tank (1) is connected to a feed pipeline (11), and the discharge end of the ethylene oxide spherical tank (1) is connected to a discharge pipeline (12). A small circulation pipeline (13) is provided between the feed pipeline (11) and the discharge pipeline (12).

3. The safety control system for an ethylene oxide spherical tank according to claim 2, characterized in that: The small circulation pipeline (13) is equipped with a valve group (2), which is connected to the field operation column (200) and the remote control room (100).

4. The safety control system for an ethylene oxide spherical tank according to claim 3, characterized in that: The small circulation pipeline (13) is equipped with a small circulation pump (131) and a cooler (132). The cooler (132) contains a cooling medium to cool down the ethylene oxide in the ethylene oxide spherical tank (1).

5. The safety control system for an ethylene oxide spherical tank according to claim 2, characterized in that: The feed line (11) is connected to the feed line (300), and the discharge line (12) is connected to the large circulation line (14).

6. The safety control system for an ethylene oxide spherical tank according to claim 5, characterized in that: The feed line (11) is equipped with a valve group (2), which is connected to the remote control room (100) and the field operation column (200).

7. The safety control system for an ethylene oxide spherical tank according to claim 1, characterized in that: The large circulation pipeline (14) is equipped with a large circulation pump (141), which is located near the connection between the unloading pipeline (400) and the large circulation pipeline (14).

8. The safety control system for an ethylene oxide spherical tank according to claim 7, characterized in that: The large circulation pipeline (14) is equipped with valve groups (2) both upstream and downstream of the large circulation pump (141).

9. The safety control system for an ethylene oxide spherical tank according to claim 1, characterized in that: The fireproof cover (23) is a rigid fireproof cover or a flexible fireproof cover, and the manual valve (21) includes an operating handwheel.

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