An emergency quantitative addition device for polymerization inhibitor and a butadiene storage system

Abstract

The utility model provides an emergency quantitative addition device for polymerization inhibitor and a butadiene storage system, the emergency quantitative addition device for polymerization inhibitor comprises: a storage device; a metering pump, the input end of several metering pumps is connected to the outlet of the storage device; a buffer, the input end of the buffer is connected to the output end of several metering pumps; a flow meter, the input end of the flow meter is connected to the output end of the buffer, and the output end of the flow meter is provided with an outlet for sending out polymerization inhibitor; and a control system, the control system is electrically connected to the flow meter, and the control system is electrically connected to the metering pump to collect the flow signal monitored by the flow meter, and when the accumulated flow reaches the set amount, the metering pump is controlled to stop working. The equipment for quickly adding polymerization inhibitor in emergency situations provided by the utility model realizes the rapid emergency addition of polymerization inhibitor during the storage of butadiene, reducing or avoiding the occurrence of larger accidents.

Description

Technical Field

[0001] The utility model relates to the technical field of butadiene storage, in particular to an emergency quantitative addition device for polymerization inhibitor and a butadiene storage system. Background Art

[0002] Butadiene is a self-polymerizing product in the petrochemical industry, and it is very likely to catch fire or explode during the polymerization process, causing loss of life and huge property. Therefore, the storage of butadiene has strict requirements on storage temperature, storage pressure, and storage tank process.

[0003] However, during the storage of butadiene, there is a certain probability that local polymerization will occur in the blind corner of the storage equipment, or the refrigeration equipment supporting the storage will fail and stop and fail to cool the butadiene material, or the equipment will be shut down for maintenance and the material at the bottom of the tank will be stored for a long time. In the above abnormal situations, butadiene materials will cause local or large-scale self-polymerization, and it will also cause certain troubles in the emergency butadiene self-polymerization disposal time. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide an emergency quantitative addition device for an inhibitor and a butadiene storage system, which are used to solve the problem in the prior art that the inhibitor cannot be quickly and efficiently replenished when local or large-scale self-polymerization of butadiene materials occurs.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides an emergency quantitative addition device for an inhibitor, comprising: a storage device; a metering pump, wherein the input end of a plurality of metering pumps is connected to the outlet of the storage device; a buffer, wherein the input end of the buffer is connected to the output end of a plurality of metering pumps; a flow meter, wherein the input end of the flow meter is connected to the output end of the buffer, and the output end of the flow meter is provided with an outlet for sending out the inhibitor; and a control system, wherein the control system is electrically connected to the flow meter, and the control system is electrically connected to the metering pump, so as to collect the flow signal monitored by the flow meter, and control the metering pump to stop working when the accumulated flow reaches a set amount.

[0006] In one embodiment of the utility model, the storage device includes: a storage tank, which has a storage chamber for storing the inhibitor; and a pneumatic delivery pump, whose output end is connected to the input end of the storage tank to pump the external inhibitor into the storage tank.

[0007] In one embodiment of the utility model, the storage device also includes: an exhaust hole, which is arranged in the middle of the top of the storage tank; a breathing valve, which is arranged on one side of the top of the storage tank; a pressure gauge, which is arranged on one side of the top of the storage tank opposite to the breathing valve; a thermometer, which is arranged on the side surface of the storage tank; and a remote measuring liquid level gauge, which is installed on the side surface of the storage tank.

[0008] In one embodiment of the utility model, the remote measurement liquid level gauge includes an on-site magnetic flap liquid level gauge and a differential pressure remote transmission liquid level gauge, and the on-site magnetic flap liquid level gauge and the differential pressure remote transmission liquid level gauge are respectively arranged on both sides of the storage tank.

[0009] In one embodiment of the utility model, the input ends of a plurality of metering pumps are connected to one side of the bottom of the storage tank through a delivery pipeline, and a flow calibration column is installed on the delivery pipeline.

[0010] In one embodiment of the present invention, when one metering pump is in a working state, the other metering pumps are in a stopped state.

[0011] In one embodiment of the present invention, the metering pump is a double diaphragm metering pump.

[0012] In one embodiment of the utility model, a remote pressure gauge PT, a field pressure gauge PG and a metering pump motor are provided on the metering pump, and a control system is electrically connected to the metering pump motor to control the on-off of the circuit between the metering pump motor and the power supply device.

[0013] In one embodiment of the utility model, the control system includes: an electric control box, which is electrically connected to the metering pump motor; and an automatic control box, whose input end is electrically connected to the flow meter, and whose output end is electrically connected to the electric control box, so that when the accumulated flow reaches a set amount, the electric control box is controlled to disconnect from the metering pump motor.

[0014] The utility model also provides a butadiene storage system, comprising the above-mentioned emergency quantitative addition equipment of polymerization inhibitor.

[0015] Beneficial effects of the utility model: The utility model proposes an emergency quantitative addition device for polymerization inhibitors and a butadiene storage system. The quantitative addition device and the butadiene storage system can realize the rapid addition of polymerization inhibitors to the butadiene storage system in emergency situations through the cooperation between the storage device, the metering pump, the flow meter and the control system. When the polymerization inhibitor needs to be added urgently, it can be quickly added without changing the original tank group process or stopping the existing machine pump. At the same time, the mixing of the polymerization inhibitor is realized by making the maximum use of the original process and original equipment of the storage tank, and there is no need to change the original storage design. Through the coordinated design between the buffer and the metering pump, because the double diaphragm metering pump has accurate dosage but poor flow linearity, the buffer can improve the linear capacity of the external flow, thereby more stably delivering the polymerization inhibitor.

[0016] In summary, the quantitative addition equipment of the utility model can quickly respond to special emergency situations of butadiene storage, and can accurately control the amount of polymerization inhibitor added, avoid or control the occurrence of butadiene or slow down the self-polymerization, and buy more time for further rescue and disposal. In addition, the processing flow is simple, the investment cost is low, and the implementation speed is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the quantitative adding equipment of the utility model.

[0018] Component number description

[0019] 1. Storage device; 2. Metering pump; 3. Buffer; 4. Flow meter; 5. Control system; 6. Delivery pipeline; 7. Flow calibration column; 11. Storage tank; 12. Pneumatic delivery pump; 13. Exhaust hole; 14. Breathing valve; 15. Pressure gauge; 16. Thermometer; 17. Remote measurement level gauge; 111. Storage chamber; 171. On-site magnetic flap level gauge; 172. Differential pressure remote transmission level gauge; 21. Remote pressure gauge PT; 22. On-site pressure gauge PG; 23. Metering pump motor; 41. Outlet; 51. Electric control box; 52. Automatic control box. DETAILED DESCRIPTION

[0020] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0021] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0022] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0023] See also Figure 1The utility model provides an emergency quantitative addition device for an inhibitor, comprising: a storage device 1, a metering pump 2, a buffer 3, a flow meter 4 and a control system 5. The input end of a plurality of metering pumps 2 is connected to the outlet of the storage device 1. The input end of the buffer 3 is connected to the output end of a plurality of metering pumps 2. The input end of the flow meter 4 is connected to the output end of the buffer 3, and the output end of the flow meter 4 is provided with an outlet 41 for sending out the inhibitor. The control system 5 is electrically connected to the flow meter 4, and the control system 5 is electrically connected to the metering pump 2 to collect the flow signal monitored by the flow meter 4, and when the accumulated flow reaches the set amount, the metering pump 2 is controlled to stop working.

[0024] It is not difficult to find from the above content that during the storage of butadiene products, when polymerization occurs, emergency quantitative addition equipment is used to add polymerization inhibitors to butadiene products in an emergency to reduce or avoid the occurrence of larger accidents. When emergency addition of polymerization inhibitors is required, it can be quickly added without changing the original tank group process or stopping the existing machine pump. At the same time, the mixing of polymerization inhibitors is realized by making maximum use of the original process and original equipment of the storage tank, and there is no need to change the original storage design. Specifically, for example, purchased butadiene-specific polymerization inhibitors can be pre-stored in the storage device 1. The input ends of multiple metering pumps 2 are connected to the storage device 1, and the output ends are connected to the outlet 41 through the buffer 3 and the flowmeter 4. During operation, the metering pump 2 can be used in a one-use-multiple-reserve manner. By using the buffer 3 at the output end of the metering pump 2, the flow rate of the polymerization inhibitor can be linearly delivered, thereby achieving more stable delivery. Then, before the butadiene system is delivered after the buffer 3, the flow rate of the polymerization inhibitor is measured by the flowmeter 4. In order to ensure that the polymerization inhibitor can be delivered quickly and accurately, the control system 5 sets the amount of the amount to be added in the butadiene system, and uses the flow meter 4 to monitor the cumulative flow of the polymerization inhibitor. When it is detected that the cumulative flow reaches the set amount, the metering pump 2 will automatically stop working to stop the continuous delivery of the polymerization inhibitor. Of course, the amount of addition can also be input again according to the actual situation. After the addition is completed, the system automatically stops and closes the delivery system valve, that is, the delivery system valve corresponding to the outlet 41.

[0025] like Figure 1 As shown, the storage device 1 includes: a storage tank 11, in which a storage chamber 111 for storing an inhibitor is provided; and a pneumatic delivery pump 12, wherein the output end of the pneumatic delivery pump 12 is connected to the input end of the storage tank 11 to pump the external inhibitor into the storage tank 11.

[0026] In one embodiment of the utility model, the storage device 1 is connected to, for example, a purchased butadiene-specific polymerization inhibitor through a pneumatic delivery pump 12 during the storage process of the polymerization inhibitor. The pneumatic delivery pump 12 pumps the butadiene-specific polymerization inhibitor into the storage tube 11. Front and rear hand valves can also be provided on the input and output ends of the pneumatic delivery pump 12 to control and cut off the communication between the pneumatic delivery pump 12 and the storage tank 11 and the connecting pipeline of the butadiene-specific polymerization inhibitor. Specifically, the pneumatic delivery pump 12 can be a discharge valve.

[0027] Furthermore, the storage device 1 also includes: an exhaust hole 13, which is arranged in the middle of the top of the storage tank 11; a breathing valve 14, which is arranged on one side of the top of the storage tank 11; a pressure gauge 15, which is arranged on one side of the top of the storage tank 11 opposite to the breathing valve 14; a thermometer 16, which is arranged on the side surface of the storage tank 11; and a remote measuring liquid level gauge 17, which is installed on the side surface of the storage tank 11.

[0028] In one embodiment of the utility model, when the agent storage tank 11 is in use, it is also equipped with an exhaust hole 13, a breathing valve 14, a pressure gauge 15, a thermometer 16 and a remote measurement liquid level gauge 17. Specifically, a root hand valve is also installed between the exhaust hole 13 and the agent storage tube 11 to control the exhaust from the exhaust hole 13. A flame arrester is also installed between the breathing valve 14 and the agent storage tank 11. A regulating valve is also installed between the pressure gauge 15 and the agent storage tank 11. When the remote measurement liquid level gauge 17 is connected to the agent storage tank 11, its two ends are respectively connected to the upper and lower ends of the agent storage tank 11, and front and rear hand valves are respectively installed to close the communication between the inhibitor and the remote measurement liquid level gauge 17.

[0029] Furthermore, the remote measuring level gauge 17 includes an on-site magnetic flap level gauge 171 and a differential pressure remote level gauge 172, and the on-site magnetic flap level gauge 171 and the differential pressure remote level gauge 172 are respectively arranged on both sides of the storage tank 11. In this embodiment, the liquid level in the storage tank 11 is monitored by two different types of level gauges, namely, the on-site magnetic flap level gauge 171 and the differential pressure remote level gauge 172.

[0030] Preferably, the input ends of several metering pumps 2 are connected to the bottom side of the storage tank 11 through the delivery pipeline 6, and a flow calibration column 7 is installed on the delivery pipeline 6. In this embodiment, by using the flow calibration column 7, it is possible to measure the fluid volume of the inhibitor passing through the delivery pipeline 6 within a preset time, thereby calculating the flow rate of the inhibitor. Moreover, the flow calibration column 7 can also achieve a smoother and more stable dosing flow rate. Specifically, a root hand valve is also provided between the flow calibration column 7 and the delivery pipeline 6 to shut off the communication between the flow calibration column 7 and the delivery pipeline 6.

[0031] Specifically, when one metering pump 2 is in working state, the other metering pumps 2 are in stopped working state. In this embodiment, when multiple metering pumps 2 are working, they can be used in a one-for-one and multiple-for-standby mode. Of course, it can also be a one-for-one and one-for-standby mode, that is, including two metering pumps 2. When the metering pump 2 as "one-for-one" is working, the other metering pumps 2 as "multiple-for-standby" or "one-for-standby" are all in stopped working state.

[0032] Preferably, the metering pump 2 is a double diaphragm metering pump. The double diaphragm metering pump mainly includes a pump head, a pump body and a diaphragm. When the double diaphragm metering pump is working, the accurate metering and delivery of the liquid is mainly based on the movement of the diaphragm. During the suction process of the pump, the diaphragm is subjected to the pressure of the piston, thereby deforming. At this time, the suction end valve of the pump is opened, and the liquid is sucked into the pump chamber, and the liquid in the pump chamber is pushed to the discharge end. During the discharge process of the pump, the diaphragm is subjected to external pressure, thereby deforming. At this time, the discharge end valve of the pump is opened, and the liquid is discharged from the pump chamber. As the discharge flow rate increases, the discharge end valve will continue to open until the flow rate stabilizes. By adjusting the movement frequency and amplitude of the pump head, the delivery amount of the fluid can be accurately controlled.

[0033] Furthermore, the metering pump 2 is provided with a remote pressure gauge PT21, an on-site pressure gauge PG22 and a metering pump motor 23, and the control system 5 is electrically connected to the metering pump motor 23 to control the on-off of the circuit between the metering pump motor 23 and the power supply device. Specifically, PT is a remote pressure gauge and PG is an on-site pressure gauge, both of which are used to detect the pressure of the metering pump 2 when the metering pump motor 23 drives the metering pump 2 to work. And when the pressure is lower than the preset value, it indicates that the diaphragm is ruptured. The situation where the pressure is lower than the preset value can also be fed back to the monitoring end for processing through the remote pressure gauge.

[0034] Among them, the control system 5 includes: an electrical control box 51, which is electrically connected to the metering pump motor 23; and an automatic control box 52, whose input end is electrically connected to the flow meter 4, and whose output end is electrically connected to the electrical control box 51, so that when the accumulated flow reaches a set amount, the electrical control box 51 is controlled to disconnect from the metering pump motor 23.

[0035] In one embodiment of the utility model, when the control system 5 controls the discharge flow of the polymerization inhibitor into the butadiene storage system, the flow condition that has been discharged into the butadiene storage system through the buffer 3 monitored by the flow meter 4 is collected through the automatic control box 52, that is, the cumulative flow is obtained. And when the cumulative flow reaches the preset value set by the automatic control box 52, the electric control box 51 will be further controlled to connect the metering pump motor 23 of the metering pump 2 with the power supply device, so that the metering pump 2 stops working.

[0036] The utility model also provides a butadiene storage system, comprising the above-mentioned emergency quantitative addition equipment of polymerization inhibitor.

[0037] In summary, the utility model can realize the rapid addition of polymerization inhibitor to the butadiene storage system in an emergency situation through the mutual cooperation between the storage device 1, the metering pump 2, the flow meter 4 and the control system 5. And the cumulative flow pumped into the butadiene storage tank is monitored by the flow meter 4, and the control system 5 automatically controls the metering pump 2 to stop working according to the preset setting amount when the cumulative flow reaches the setting amount, so as to realize the quantitative monitoring of the addition of the polymerization inhibitor to the butadiene storage tank. By designing the buffer 3 at the outlet 41 to cooperate with the use of the metering pump 2, it can be realized that the polymerization inhibitor can be added to the butadiene storage tank linearly, and then a more stable external delivery is completed. And it is realized that when the metering pump 2 is a double diaphragm metering pump, the problem of poor flow linearity is solved. In the storage device 1, by installing the exhaust hole 13, the breathing valve 14, the pressure gauge 15, the thermometer 16 and the remote measurement liquid level gauge 17 on the storage tank 11, when in use, the use safety and liquid level monitoring of the storage tank 11 can be better guaranteed. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0038] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An emergency quantitative addition device for polymerization inhibitor, characterized in that: include: A storage device (1); A metering pump (2), wherein the input ends of a plurality of the metering pumps (2) are connected to the outlet of the storage device (1); A buffer (3), wherein an input end of the buffer (3) is connected to output ends of a plurality of the metering pumps (2); A flow meter (4), wherein the input end of the flow meter (4) is connected to the output end of the buffer (3), and the output end of the flow meter (4) is provided with an outlet (41) for delivering the polymerization inhibitor; and A control system (5), wherein the control system (5) is electrically connected to the flow meter (4), and the control system (5) is electrically connected to the metering pump (2) to collect the flow signal monitored by the flow meter (4), and control the metering pump (2) to stop working when the accumulated flow reaches a set amount.

2. The emergency quantitative addition equipment of polymerization inhibitor according to claim 1, characterized in that: The storage device (1) comprises: A storage tank (11), wherein the storage tank (11) is provided with a storage chamber (111) for storing the polymerization inhibitor; and A pneumatic delivery pump (12), wherein the output end of the pneumatic delivery pump (12) is connected to the input end of the storage tank (11) so as to pump the external polymerization inhibitor into the storage tank (11).

3. The emergency quantitative addition device of polymerization inhibitor according to claim 2, characterized in that: The storage device (1) further comprises: An exhaust hole (13), the exhaust hole (13) being arranged in the middle of the top of the storage tank (11); A breathing valve (14), the breathing valve (14) being arranged on one side of the top of the storage tank (11); a pressure gauge (15), the pressure gauge (15) being arranged on a top side of the storage tank (11) opposite to the breathing valve (14); a thermometer (16), the thermometer (16) being arranged on a side surface of the storage tank (11); and A remote measuring liquid level meter (17), wherein the remote measuring liquid level meter (17) is installed on a side surface of the storage tank (11).

4. The emergency quantitative addition device of polymerization inhibitor according to claim 3, characterized in that: The remote measurement liquid level meter (17) comprises an on-site magnetic flap liquid level meter (171) and a differential pressure remote transmission liquid level meter (172), and the on-site magnetic flap liquid level meter (171) and the differential pressure remote transmission liquid level meter (172) are respectively arranged on both sides of the storage tank (11).

5. The emergency quantitative addition device of polymerization inhibitor according to claim 2, characterized in that: The input ends of the plurality of metering pumps (2) are connected to one side of the bottom of the storage tank (11) through a delivery pipeline (6), and a flow calibration column (7) is installed on the delivery pipeline (6).

6. The emergency quantitative addition device of polymerization inhibitor according to claim 5, characterized in that: When one of the metering pumps (2) is in a working state, the other metering pumps (2) are in a stopped working state.

7. The emergency quantitative addition equipment of polymerization inhibitor according to claim 1, characterized in that: The metering pump (2) is a double diaphragm metering pump.

8. The emergency quantitative addition equipment of polymerization inhibitor according to claim 1, characterized in that: The metering pump (2) is provided with a remote pressure gauge PT (21), a field pressure gauge PG (22) and a metering pump motor (23); the control system (5) is electrically connected to the metering pump motor (23) to control the on-off of the circuit between the metering pump motor (23) and the power supply device.

9. The emergency quantitative addition device of polymerization inhibitor according to claim 8, characterized in that: The control system (5) comprises: An electric control box (51), the electric control box (51) being electrically connected to the metering pump motor (23); and An automatic control box (52), wherein an input end of the automatic control box (52) is electrically connected to the flow meter (4), and an output end of the automatic control box (52) is electrically connected to the electric control box (51), so that when the accumulated flow reaches the set amount, the electric control box (51) is controlled to disconnect from the metering pump motor (23).

10. A butadiene storage system, characterized in that: The invention comprises the emergency quantitative addition equipment of polymerization inhibitor as described in any one of claims 1 to 9.

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