Double-pump skid-mounted airtight oil unloading device

Abstract

The utility model discloses a double-pump skid-mounted airtight oil unloading device which comprises a base, a buffer tank, a basket filter, an unloading crane pipe and an oil unloading pump, the buffer tank is arranged above the base, the basket filter and the oil unloading pump are symmetrically arranged on the two sides of the buffer tank, the basket filter and the unloading crane pipe are both fixedly arranged above the base, and the oil unloading pump is arranged on the base. The unloading crane pipe is arranged above the base, two inlets are formed in the unloading crane pipe, the unloading crane pipe is connected with the basket type filter and the buffer tank, the output end of the basket type filter is connected with the buffer tank and the oil unloading pumps, the buffer tank is connected with the oil unloading pumps, the number of the oil unloading pumps is two, and the two oil unloading pumps are respectively a roots pump and a centrifugal pump. The utility model belongs to the technical field of crude oil treatment, and particularly provides a double-pump skid-mounted closed oil unloading device which is characterized in that when a main pump breaks down, a standby pump takes over work, continuous operation of a system is ensured, reliability and stability of the system are improved, and oil unloading efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to crude oil processing technical field, specifically point to a kind of double-pump skid-mounted closed oil unloading device. BACKGROUND

[0002] When crude oil is transported, the crude oil of oil-producing area is generally filled into tank truck, and then the tank truck pulls down to use place with crude oil. When the tank truck reaches the use place, the crude oil in the tank needs to be unloaded, at this time, the oil unloading pump is used, and in the ordinary oil unloading process, the pipeline of the oil unloading pump is directly connected with the pipeline of the tank loaded with crude oil to directly unload, so that air is easily punched into the pipe network in the oil unloading process. The existing skid-mounted closed oil unloading device only has one oil unloading pump, when the oil unloading pump fails, the oil unloading work is interrupted, which leads to low oil unloading efficiency. Therefore, there is an urgent need for a new double-pump skid-mounted closed oil unloading device to solve the above problems. CONTENT OF UTILITY MODEL

[0003] To solve the above problems, the utility model provides a double-pump skid-mounted closed oil unloading device, which can ensure the system continues to run, improve the reliability and stability of the system, and improve the oil unloading efficiency when the main pump fails.

[0004] The technical scheme adopted by the utility model is as follows: the utility model double-pump skid-mounted closed oil unloading device, including base, buffer tank, basket filter, unloading crane pipe and oil unloading pump, the buffer tank is located above the base, the basket filter and the oil unloading pump are symmetrically arranged on the two sides of the buffer tank, the basket filter and the unloading crane pipe are fixedly arranged above the base, the unloading crane pipe is arranged above the base, the unloading crane pipe is provided with two inlets, the unloading crane pipe is connected with the basket filter and the buffer tank, the output end of the basket filter is connected with the buffer tank and the oil unloading pump, the buffer tank is connected with the oil unloading pump, the oil unloading pump is provided with two, the two oil unloading pumps are Roots pump and centrifugal pump respectively.

[0005] Further, a liquid level meter is arranged in the buffer tank, a liquid level transmitter is arranged between the buffer tank and the oil unloading pump, and the liquid level transmitter is connected with the lower end of the buffer tank.

[0006] Further, the input end of the Roots pump and the centrifugal pump is connected with the liquid level transmitter, and the output end of the Roots pump and the centrifugal pump is connected with the outlet.

[0007] Further, a pressure transmitter is arranged between the unloading crane pipe and the buffer tank, and a temperature transmitter is arranged between the liquid level transmitter and the oil unloading pump.

[0008] Further, a flame arrester is arranged above the buffer tank, and a breather valve is arranged on one side of the flame arrester.

[0009] Further, the buffer tank is provided with a venting vertical pipe, and the venting vertical pipe is connected with the buffer tank and the flame arrester respectively.

[0010] Further, the buffer tank is provided with an electric heater.

[0011] Further, the base is provided with an explosion-proof power distribution cabinet and a PLC control cabinet.

[0012] The beneficial effects of the double-pump skid-mounted closed oil unloading device are as follows: the Roots pump and the centrifugal pump are used as backup for each other, the reliability and stability of the system are improved, when one of the oil unloading pumps fails, the other oil unloading pump continues to work, the continuous operation of the system is ensured, and the oil unloading efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 FIG. 1 is a front view of the double-pump skid-mounted closed oil unloading device;

[0014] Figure 2 FIG. 2 is a top view of the double-pump skid-mounted closed oil unloading device;

[0015] Figure 3 FIG. 3 is a sectional view of the double-pump skid-mounted closed oil unloading device.

[0016] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application. In the drawings: 1, base, 2, buffer tank, 3, basket filter, 4, unloading crane pipe, 5, oil unloading pump, 6, Roots pump, 7, centrifugal pump, 8, liquid level meter, 9, liquid level transmitter, 10, pressure transmitter, 11, temperature transmitter, 12, flame arrester, 13, breather valve, 14, venting vertical pipe, 15, electric heater, 16, explosion-proof power distribution cabinet, 17, PLC control cabinet. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application; based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0018] As Figures 1-3As shown, the double-pump skid-mounted closed oil unloading device provided by the present application comprises a base 1, a buffer tank 2, a basket filter 3, an unloading crane pipe 4 and an oil unloading pump 5. The buffer tank 2 is arranged above the base 1. The basket filter 3 and the oil unloading pump 5 are symmetrically arranged on the two sides of the buffer tank 2. The basket filter 3 and the unloading crane pipe 4 are both fixedly arranged above the base 1. The unloading crane pipe 4 is arranged above the base 1. The unloading crane pipe 4 is provided with two inlets. The unloading crane pipe 4 is connected with the basket filter 3 and the buffer tank 2. The output end of the basket filter 3 is connected with the buffer tank 2 and the oil unloading pump 5. The buffer tank 2 is connected with the oil unloading pump 5. The oil unloading pump 5 is provided with two, which are a Roots pump 6 and a centrifugal pump 7.

[0019] As shown in Figure 1 and Figure 2 The buffer tank 2 is provided with a liquid level meter 8. A liquid level transmitter 9 is arranged between the buffer tank 2 and the oil unloading pump 5. The liquid level transmitter 9 is connected with the lower end of the buffer tank 2. The input ends of the Roots pump 6 and the centrifugal pump 7 are both connected with the liquid level transmitter 9. The output ends of the Roots pump 6 and the centrifugal pump 7 are both connected with an outlet. A pressure transmitter 10 is arranged between the unloading crane pipe 4 and the buffer tank 2. A temperature transmitter 11 is arranged between the liquid level transmitter 9 and the oil unloading pump 5.

[0020] As shown in Figure 1 A flame arrester 12 is arranged above the buffer tank 2. A breather valve 13 is arranged on one side of the flame arrester 12. An emptying stand pipe 14 is arranged above the buffer tank 2. The two ends of the emptying stand pipe 14 are respectively connected with the buffer tank 2 and the flame arrester 12.

[0021] The buffer tank 2 is provided with an electric heater 15. An explosion-proof power distribution cabinet 16 and a PLC control cabinet 17 are arranged above one end of the base 1.

[0022] In specific use, crude oil flows into the basket filter 3 through the inlets of the unloading crane pipe 4. The basket filter 3 filters the crude oil. The filtered crude oil enters the buffer tank 2. When the liquid level meter 8 in the buffer tank 2 detects that the liquid level reaches the set liquid level, one of the two oil unloading pumps 5 is opened. When the liquid level meter 8 in the buffer tank 2 detects that the liquid level is lower than the set liquid level, the oil unloading pump 5 is closed. When the liquid level of the buffer tank 2 reaches the set maximum liquid level, the inlet valve is automatically closed to prevent liquid level from leaking due to top overflow.

[0023] When one of the oil unloading pumps 5 fails, the other oil unloading pump 5 is started to ensure the continuous operation of the system and improve the oil unloading efficiency. The Roots pump 6 and the centrifugal pump 7 are mutually standby to improve the reliability and stability of the system.

[0024] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0025] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A dual pump skid mounted closed drain oil unloading apparatus, characterized by: The device comprises a base, a buffer tank, a basket filter, a unloading crane pipe and an oil unloading pump, the buffer tank is arranged above the base, the basket filter and the oil unloading pump are symmetrically arranged on both sides of the buffer tank, the basket filter and the unloading crane pipe are fixedly arranged above the base, the unloading crane pipe is arranged above the base, the unloading crane pipe is provided with two inlets, the unloading crane pipe is connected with the basket filter and the buffer tank, the output end of the basket filter is connected with the buffer tank and the oil unloading pump, the buffer tank is connected with the oil unloading pump, the oil unloading pump is provided with two, the two oil unloading pumps are a Roots pump and a centrifugal pump respectively.

2. A dual pump skid mounted closed drain oil unloading apparatus as defined in claim 1, wherein: The buffer tank is provided with a liquid level meter, and a liquid level transmitter is arranged between the buffer tank and the oil unloading pump, and the liquid level transmitter is connected with the lower end of the buffer tank.

3. A dual pump skid mounted closed drain oil unloading apparatus as defined in claim 2 wherein: The input ends of the Roots pump and the centrifugal pump are connected with the liquid level transmitter, and the output ends of the Roots pump and the centrifugal pump are connected with the outlet.

4. A dual pump skid mounted closed drain oil unloading apparatus as defined in claim 3 wherein: A pressure transmitter is arranged between the unloading crane pipe and the buffer tank, and a temperature transmitter is arranged between the liquid level transmitter and the oil unloading pump.

5. A dual pump skid mounted closed drain oil unloading apparatus as defined in claim 1 wherein: A flame arrester is arranged above the buffer tank, and a breathing valve is arranged on one side of the flame arrester.

6. A dual pump skid mounted closed drain oil unloading apparatus as defined in claim 5, wherein: A venting stand pipe is arranged above the buffer tank, and the venting stand pipe is connected with the buffer tank and the flame arrester at both ends.

7. A dual pump skid mounted closed drain oil unloading apparatus as defined in claim 1 wherein: An electric heater is arranged in the buffer tank.

8. A dual pump skid mounted closed drain oil unloading apparatus as defined in claim 1 wherein: An explosion-proof power distribution cabinet and a PLC control cabinet are arranged above one end of the base.

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