Integrated pumping station for explosive gas environment

Abstract

The present invention discloses an integrated pump station in an explosive gas environment, including a pump room, a control cabinet, an air compressor unit and several chemical pump units. The top surface of the pump room is provided with an exhaust pipe, an explosive gas detector, a third temperature probe and an air pressure sensor. The air compressor unit and the pump room are connected by an air pipe; a horizontal partition is provided at the lower part of the pump room, and the horizontal partition divides the pump room into two spaces arranged up and down, namely, an equipment room and a pressure equalizing room. The horizontal partition is provided with several evenly distributed pressure equalizing holes; the control cabinet and several chemical pump units are arranged in the equipment room and fixed on the horizontal partition; the air compressor unit is connected to the air pipe. The present invention reduces the danger level of the working environment, reduces the inflammable and explosive environment to a non-inflammable and explosive environment in the pump room; changes the original high-cost explosion-proof electrical appliances into low-cost non-explosion-proof electrical appliances, and improves the safety level at the same time.

Description

Technical Field

[0001] The invention relates to an integrated pump station, in particular to an integrated pump station in an explosive gas environment. Background Art

[0002] Petrochemical pumps are important equipment in the oil refining and petrochemical industries. The flow of any process fluid is inseparable from petrochemical pumps. In the oil refining and petrochemical industries, petrochemical pumps work in flammable and explosive gas environments. Inflammable and explosive gases such as hydrogen, methane, acetylene, ethane, ethylene, and propylene are often distributed in the air environment. In an explosive gas environment, electrical equipment such as the motor and control cabinet of the petrochemical pump is required to be explosion-proof electrical appliances, such as flameproof motors or increased safety motors.

[0003] However, the flameproof motors or increased safety motors used in existing petrochemical pumps have many defects. On the one hand, hundreds of petrochemical pumps may work at the same time in the same explosive gas environment. If a petrochemical pump equipped with an explosion-proof motor explodes due to a fault, it may cause a catastrophic accident in the entire explosive area, causing immeasurable losses. On the other hand, the initial cost and operating cost of explosion-proof motors and explosion-proof control cabinets are high, and the reliability is low, with only one safety protection measure. All explosion-proof electrical appliances need to be certified for explosion-proof, and both new and modified designs need to be type-tested and certified. The processing accuracy requirements of the equipment are high, which leads to a high initial cost of explosion-proof electrical appliances. In addition, the operating cost of explosion-proof electrical appliances such as explosion-proof motors is high. For example, due to long-term use, the flameproof joint surface of the explosion-proof motor is worn, the explosion-proof performance is reduced, and the cost of returning to the factory for repair is high, which may affect the normal operation of the chemical process. Explosion-proof electrical appliances such as explosion-proof motors have only one safety protection measure, and if it fails, it will cause immeasurable losses. Finally, the safety and reliability of explosion-proof control cabinets are also low.

[0004] In short, the explosion-proof electrical appliances used in existing petrochemical pumps are of high cost, low reliability and poor safety. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an integrated pump station in an explosive gas environment, which can effectively solve the many defects of the prior art explosion-proof electrical appliances such as high cost, low reliability and poor safety.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] An integrated pump station in an explosive gas environment includes a pump room, a control cabinet, an air compressor unit and several chemical pump units. The top surface of the pump room is provided with an exhaust pipe, an explosive gas detector, a third temperature probe and an air pressure sensor. The air compressor unit and the pump room are connected through an air pipe; the pump room adopts a fully sealed structure and is made of lightweight materials. A sealed door and a transparent window are provided on the side of the pump room; a horizontal partition is provided at the bottom of the pump room, and the horizontal partition divides the pump room into two spaces arranged up and down, namely, an equipment room and an equalizing pressure room. The horizontal partition is provided with several equalizing Evenly distributed pressure equalizing holes, the pressure equalizing holes connect the equipment room and the pressure equalizing chamber; the control cabinet and several chemical pump groups are arranged in the equipment room and fixed on the horizontal partition; the chemical pump group includes a pump head and a motor, the bearing position of the pump head is provided with a second temperature probe, and the bearing position of the motor is provided with a first temperature probe; the air compressor unit includes an air compressor, an air filter and a variable frequency motor, the air filter is connected to the inlet of the air compressor, the variable frequency motor is used to drive the air compressor, and the air compressor outlet is connected to the air pipe;

[0008] The control cabinet includes a programmable controller, a frequency converter and several AC contactors. The programmable controller is the controller of the integrated pump station, and the frequency converter is the driver of the variable frequency motor. The first temperature probe, the second temperature probe, the third temperature probe, the explosive gas detector and the air pressure sensor are all connected to the programmable controller through signal lines, the control end of the frequency converter is connected to the programmable controller, the power output cable of the frequency converter is connected to the variable frequency motor, the control end of the AC contactor is connected to the programmable controller, and the power output cable of the AC contactor is connected to the motor.

[0009] The control cabinet, motor, variable frequency motor, explosive gas detector, first temperature probe, second temperature probe, third temperature probe and air pressure sensor are all non-explosion-proof electrical appliances.

[0010] The pump room is in an explosive gas environment, and the air compressor unit is in a non-explosive gas environment.

[0011] As a further improvement of the present invention, the air pressure in the pump room is slightly higher than the air pressure outside the pump room.

[0012] As a further improvement of the present invention, the sealed door and the transparent window are completely sealed from the pump room when the integrated pump station operates normally.

[0013] As a further improvement of the present invention, the exhaust pipe includes a rainproof cap and a hollow pipe; the hollow pipe is provided with a one-way valve, and the one-way valve only allows gas to flow from the pump room to the outside of the pump room.

[0014] As a further improvement of the present invention, the bottom surface and the top surface of the control cabinet are respectively provided with air inlet holes and air outlet holes.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. Reduce the danger level of the working environment: reduce the flammable and explosive environment in which the original equipment works to a non-flammable and explosive environment in the pump room.

[0017] 2. Reduced equipment costs: replaced the original high-cost explosion-proof electrical appliances with lower-cost non-explosion-proof electrical appliances.

[0018] 3. Improved safety level: Multiple measures are adopted to warn of danger or improve the safety level. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the principle of the present invention.

[0021] Figure 2 for Figure 1 A local enlarged view of point I.

[0022] Figure 3 It is a schematic diagram of the principle of the control cabinet of the present invention.

[0023] Figure 4 It is a top view of the air compressor unit of the present invention.

[0024] In the figure: 1, pump room, 2, chemical pump group, 3, control cabinet, 4, air compressor unit, 5, exhaust pipe, 6, explosive gas detector, 7, first temperature probe, 8, second temperature probe, 9, third temperature probe, 10, air pressure sensor, 11, sealed door, 12, transparent window, 13, equalizing pressure chamber, 14, equipment room, 15, horizontal partition, 16, equalizing pressure hole, 21, pump head, 22, motor, 31, programmable controller, 32, frequency converter, 33, AC contactor, 41, air compressor, 42, air filter, 43, frequency converter motor, 44, air pipe, 51, rain cap, 52, hollow tube. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; the mechanical connection can be welding, riveting, threaded connection or flange connection, etc.; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] like Figures 1 to 4As shown, the present invention provides an integrated pump station in an explosive gas environment, including a pump room 1, a control cabinet 3, an air compressor unit 4 and several chemical pump units 2. The top surface of the pump room 1 is provided with an exhaust pipe 5, an explosive gas detector 6, a third temperature probe 9 and an air pressure sensor 10. The air compressor unit 4 and the pump room 1 are connected through an air pipe 44. The pump room 1 adopts a fully sealed structure and is made of lightweight materials. A sealed door 11 and a transparent window 12 are provided on the side of the pump room 1. The sealed door 11 and the transparent window 12 are completely sealed from the pump room 1 when the integrated pump station is working normally. The pump room 1 with a fully sealed structure can completely separate the inside and outside of the pump room 1 and form two spatial environments. The sealed door 11 can ensure the strict sealing of the pump room 1 when it is closed, and the transparent window 12 can ensure that the situation inside the pump room 1 can be observed from the outside under the sealed condition, and at the same time, there can be a certain amount of lighting. A horizontal partition 15 is provided at the lower part of the pump room 1. The horizontal partition 15 divides the pump room 1 into two spaces arranged up and down, namely, the equipment room 14 and the equalizing pressure chamber 13. The horizontal partition 15 is provided with several evenly distributed equalizing pressure holes 16. The equalizing pressure holes 16 connect the equipment room 14 and the equalizing pressure chamber 13. The equalizing pressure holes 16 can make the compressed air in the equalizing pressure chamber 13 flow evenly into the equipment room 14. The control cabinet 3 and several chemical pump groups 2 are arranged in the equipment room 14 and fixed on the horizontal partition 15. The chemical pump group 2 includes a pump head 21 and a motor 22. The bearing position of the pump head 21 is provided with a second temperature probe 8, and the bearing position of the motor 22 is provided with a first temperature probe 7. If necessary, temperature probes can also be arranged on the motor windings and the core. The temperature probes including the first temperature probe 7 and the second temperature probe 8 can monitor the maximum temperature of the relevant parts. The air compressor unit 4 includes an air compressor 41, an air filter 42 and a variable frequency motor 43. The air filter 42 is connected to the inlet of the air compressor 41. The variable frequency motor 43 is used to drive the air compressor 41. The outlet of the air compressor 41 is connected to the air pipe 44. The air compressor unit 4 is a power source for generating compressed air. The variable frequency motor 43 can change the speed of the air compressor 41 to adjust the output flow and pressure.

[0029] The control cabinet 3 includes a programmable controller 31, a frequency converter 32 and several AC contactors 33. The programmable controller 31 is the controller of the integrated pump station, and the frequency converter 32 is the driver of the variable frequency motor 43. The first temperature probe 7, the second temperature probe 8, the third temperature probe 9, the explosive gas detector 6 and the air pressure sensor 10 are all connected to the programmable controller 31 through signal lines. The control end of the frequency converter 32 is connected to the programmable controller 31, the power output cable of the frequency converter 32 is connected to the variable frequency motor 43, the control end of the AC contactor 33 is connected to the programmable controller 31, and the power output cable of the AC contactor 33 is connected to the motor 22. The programmable controller 31 can process the signals received from the first temperature probe 7, the second temperature probe 8, the third temperature probe 9, the explosive gas detector 6 and the air pressure sensor 10, and make corresponding responses according to different signal values ​​by judging the signals, such as issuing an alarm, adjusting the speed of the variable frequency motor 43 or shutting down the motor 22. The programmable controller 31 starts and stops the motor 22 by controlling the AC contactor 33 , and changes the output frequency of the inverter 32 by sending instructions to the inverter 32 , thereby adjusting the rotation speed of the variable frequency motor 43 .

[0030] The control cabinet 3, the motor 22, the variable frequency motor 43, the explosive gas detector 6, the first temperature probe 7, the second temperature probe 8, the third temperature probe 9 and the air pressure sensor 10 are all non-explosion-proof electrical appliances. The explosion-proof electrical appliances (explosion-proof motors, explosion-proof control cabinets, etc.) of the prior art use complex technologies and require 3C certification and explosion-proof certification, so the cost is relatively high. Compared with the explosion-proof electrical appliances of the prior art, the non-explosion-proof electrical appliances used in this embodiment reduce the technical difficulty and cost of the equipment and improve the reliability and safety of the equipment.

[0031] The air pressure in the pump room 1 is slightly higher than the air pressure outside the pump room 1, which can ensure that the air containing explosive gas outside the pump room 1 will not flow back into the pump room 1, and a non-explosive gas environment is formed in the pump room 1. Although the outside of the pump room 1 is an explosive gas environment, the air compressor unit 4 is in a non-explosive gas environment, which can ensure that the air input into the pump room 1 through the air compressor unit 4 is non-explosive gas.

[0032] The exhaust pipe 5 includes a rain cap 51 and a hollow pipe 52. The hollow pipe 52 is provided with a one-way valve, which only allows gas to flow from the pump room 1 to the outside of the pump room 1, and can further ensure that the air containing explosive gas outside the pump room 1 will not flow back into the pump room 1.

[0033] The bottom and top surfaces of the control cabinet 3 are respectively provided with air inlet holes and air outlet holes, which can continuously replace the air in the control cabinet 3 .

[0034] The working principle of this embodiment:

[0035] The air compressor unit 4 in a non-explosive gas environment is a pure air boosting device. After the air is filtered by the air filter 42, the pure air enters the air compressor 41 for boosting, and the compressed air enters the equalizing chamber 13 at the bottom of the pump room 1 through the air pipe 44. Then the compressed air flows evenly into the equipment room 14 through a plurality of equalizing holes 16, replacing the air originally mixed with part of the flammable and explosive gas, and the original gas is discharged to the outside of the pump room 1 through the exhaust pipe 5. Therefore, the equipment room 14 is changed from an explosive gas environment to a non-explosive gas environment, so that the control cabinet 3 and the chemical pump group 2 placed in the equipment room 14 can use non-explosion-proof equipment, which greatly reduces the equipment cost. The explosive gas detector 6 is to monitor whether the gas in the pump room 1 contains a certain concentration of explosive gas. If the chemical pump group 2 that transports flammable and explosive media leaks, the gas in the equipment room 14 will be mixed with explosive gas. At this time, the explosive gas detector 6 will transmit the detected concentration value to the programmable controller 31 in the control cabinet 3. The programmable controller 31 increases the output frequency of the frequency converter 32 by sending instructions to the frequency converter 32, thereby increasing the speed of the variable frequency motor 43, and finally realizing that the air compressor unit 4 increases the flow rate and pressure of the compressed air. In this way, the gas in the equipment room 14 is quickly replaced, ensuring a non-explosive gas environment in the equipment room 14 to avoid explosion accidents. The first temperature probe 7 and the second temperature probe 8 are used to monitor the temperature of the equipment surface. If there is an abnormal over-temperature, the signal will be transmitted to the programmable controller 31, and the programmable controller 31 will control the alarm to sound an alarm or shut down the relevant equipment for maintenance. The first temperature probe 7 is used to monitor the overall temperature of the gas in the equipment room 14, which ensures the safety of the equipment in the pump room 1 from another aspect. When a staff member opens the sealed door 11 and enters the pump room 1, the gas in the pump room 1 quickly overflows from the inside to the outside of the pump room 1, and the pressure of the gas in the pump room 1 decreases. The air pressure sensor 10 installed on the top of the pump room 1 will transmit the air pressure value at this time to the programmable controller 31. The programmable controller 31 sends instructions to the frequency converter 32 to increase the output frequency of the frequency converter 32, thereby increasing the speed of the variable frequency motor 43, and finally realizing that the air compressor unit 4 increases the flow and pressure of the compressed air to balance the decrease in the air pressure in the pump room 1 until the air pressure reaches the original set value. It can be seen that multiple measures ensure the safety of the integrated pump station.

[0036] Compared with the existing explosion-proof electrical appliances (explosion-proof motors, explosion-proof control cabinets, etc.) technology, the direction of the technical solution of this application is to transform the explosive gas environment into a non-explosive gas environment. The control cabinets, motors and other electrical equipment in the pump room are ordinary equipment (non-explosion-proof equipment) and do not require explosion-proof certification. The direction of the technical solution of existing explosion-proof electrical appliances (explosion-proof motors, explosion-proof control cabinets, etc.) is to transform the equipment itself to improve its explosion-proof performance, and 3C certification and explosion-proof certification are required.

[0037] Compared with the prior art explosion-proof equipment working in explosive gas environments, the integrated pump station in explosive gas environments described in this embodiment has significant advantages:

[0038] The danger level of the working environment has been reduced, and the flammable and explosive environment in which the original equipment works has been reduced to a non-flammable and explosive environment in pump room 1; the equipment cost has been reduced, and the original high-cost explosion-proof electrical appliances have been changed to low-cost non-explosion-proof electrical appliances; the safety level has been improved, and multiple measures have been adopted to warn of danger or improve the safety level.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Integrated pumping station for explosive gas environment, characterized by: It includes a pump room, a control cabinet, an air compressor unit and several chemical pump units. The top surface of the pump room is provided with an exhaust pipe, an explosive gas detector, a third temperature probe and an air pressure sensor. The air compressor unit and the pump room are connected by an air pipe. The pump room adopts a fully sealed structure and is made of lightweight materials. The side of the pump room is provided with a sealed door and a transparent window. The lower part of the pump room is provided with a horizontal partition, which divides the pump room into two spaces arranged up and down, namely an equipment room and a pressure equalizing room. The horizontal partition is provided with several evenly distributed pressure equalizing holes. , the pressure equalizing hole connects the equipment room and the pressure equalizing chamber; the control cabinet and several chemical pump groups are arranged in the equipment room and fixed on the horizontal partition; the chemical pump group includes a pump head and a motor, the bearing position of the pump head is provided with a second temperature probe, and the bearing position of the motor is provided with a first temperature probe; the air compressor unit includes an air compressor, an air filter and a variable frequency motor, the air filter is connected to the inlet of the air compressor, the variable frequency motor is used to drive the air compressor, and the air compressor outlet is connected to the air pipe; The control cabinet includes a programmable controller, a frequency converter and several AC contactors, wherein the programmable controller is the controller of the integrated pump station, and the frequency converter is the driver of the variable frequency motor; the first temperature probe, the second temperature probe, the third temperature probe, the explosive gas detector and the air pressure sensor are all connected to the programmable controller through signal lines, the control end of the frequency converter is connected to the programmable controller, the power output cable of the frequency converter is connected to the variable frequency motor, the control end of the AC contactor is connected to the programmable controller, and the power output cable of the AC contactor is connected to the motor; The control cabinet, motor, variable frequency motor, explosive gas detector, first temperature probe, second temperature probe, third temperature probe and air pressure sensor are all non-explosion-proof electrical appliances; The pump room is in an explosive gas environment, and the air compressor unit is in a non-explosive gas environment.

2. The integrated pump station for explosive gas environment according to claim 1, characterized in that: The air pressure in the pump room is slightly higher than the air pressure outside the pump room.

3. The integrated pump station for explosive gas environment according to claim 1, characterized in that: The sealed door and the transparent window are completely sealed from the pump room when the integrated pump station is operating normally.

4. The integrated pump station for explosive gas environment according to claim 1, characterized in that: The exhaust pipe comprises a rainproof cap and a hollow pipe; the hollow pipe is provided with a one-way valve, and the one-way valve only allows gas to flow from the pump room to the outside of the pump room.

5. The integrated pump station for explosive gas environment according to claim 1, characterized in that: The bottom surface and top surface of the control cabinet are respectively provided with air inlet holes and air outlet holes.

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