Open discharge system
By installing the open discharge pump on the deck in the open discharge system and installing a one-way valve in the open discharge caisson, combined with a pneumatic diaphragm pump and a cooling flushing pipeline, the high failure rate and maintenance difficulties of the open discharge pump in the open discharge caisson are solved, and convenient maintenance and safe maintenance are achieved.
Patent Information
- Application Number
- CN202422735489.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-08
AI Technical Summary
In the open discharge system, the open discharge pump in the open discharge caisson has a high failure rate and is difficult to repair. In particular, the lack of lifting lugs on the 8.5-meter deck makes it difficult to remove the pump for maintenance, posing a safety risk.
The open-drain pump is installed on the deck, and a one-way valve is installed in the open-drain caisson. The open-drain pump and the open-drain caisson are connected through a discharge pipeline. A pneumatic diaphragm pump is used as the open-drain pump, and it is maintained and protected in combination with a cooling flushing pipeline and a filter.
It simplifies the daily maintenance of the open-drain pump, reduces the failure rate, avoids the backflow of sewage in the open-drain pump inlet pipeline, ensures that the open-drain pump inlet pipeline remains full of liquid, and improves safety and maintenance convenience.
Smart Images
Figure CN223358234U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of offshore platforms, in particular to an open discharge system. Background Art
[0002] The open drain system receives hydrocarbon-containing open drains from the crude oil production system, produced water system, and other areas and equipment, as well as equipment cooling water, deck wash, and initial rainwater. Effluents from these areas and equipment are first collected in the open drain manifold and then flow into the open drain caisson (open drain caisson). The open drain system is a normal pressure system vented to the atmosphere.
[0003] The oily wastewater from the open discharge manifolds in hazardous and non-hazardous areas enters the open discharge caisson. After staying there for a period of time, the floating oil in the caisson accumulates to a certain level and is pumped into the closed discharge tank by the open discharge pump for further treatment. The water in the caisson is discharged into the sea through the discharge port at the bottom of the caisson.
[0004] The temperature of the caisson was around 96°C, and the difficulty in filling the inlet pipeline and the high temperature led to frequent pump failures. Since the caisson pump was suspended inside the caisson, each maintenance required the removal of the caisson cover flange, which caused great inconvenience in daily maintenance. Furthermore, there were no suitable lifting lugs on the 8.5-meter deck to remove the caisson pump for maintenance, which increased the difficulty and safety risks of pump removal. Utility Model Content
[0005] The technical problem to be solved by the present invention is to provide an improved open exhaust system.
[0006] The technical solution adopted by the utility model to solve the technical problem is to provide an open discharge system, including:
[0007] Open drainage caisson, set underwater, used to receive oily wastewater;
[0008] a one-way valve disposed in the open-discharge caisson, wherein the outlet of the one-way valve is cooperatively connected to the outlet of the open-discharge caisson, and the inlet of the one-way valve is in communication with the inner cavity of the open-discharge caisson;
[0009] Open discharge pump, installed on the deck;
[0010] A discharge pipeline is connected between the outlet of the one-way valve and the inlet of the open-discharge pump.
[0011] In some embodiments, the open-displacement pump is an air-operated diaphragm pump.
[0012] In some embodiments, the open discharge system further comprises an air source and an air source pipeline disposed on the deck; the air source pipeline is connected between the air source and the air source inlet of the open discharge pump.
[0013] In some embodiments, the open exhaust system further includes a filter disposed on the exhaust line.
[0014] In some embodiments, the filter is a basket filter.
[0015] In some embodiments, the open drainage system further comprises a first cooling flush line connected between a fresh water source and a water inlet of the open drainage caisson.
[0016] In some embodiments, the open drain system further comprises a second cooling flush line connected between a source of fresh water and the filter.
[0017] In some embodiments, the open discharge system further comprises a cooling and flushing main line; one end of the cooling and flushing main line is connected to a fresh water source, and the other end is provided with a tee joint;
[0018] The first cooling and flushing pipeline is connected between the water inlet of the open-row caisson and one joint of the three-way joint, and the second cooling and flushing pipeline is connected between the filter and the other joint of the three-way joint.
[0019] In some embodiments, the open exhaust system further includes a first ball valve disposed on the cooling and flushing main line, a second ball valve disposed on the first cooling and flushing line, and a third ball valve disposed on the second cooling and flushing line.
[0020] In some embodiments, the one-way valve includes a valve body and a valve ball movably arranged in the valve body; the opposite ends of the valve body are respectively provided with an inlet end and an outlet end, the inner side of the inlet end is provided with a spherical step that matches the outer periphery of the valve ball, and the position near the outlet end of the valve body is provided with a limiting step that restricts the valve ball in the valve body.
[0021] The beneficial effects of the utility model are as follows: the open-drain pump is arranged on the deck, which is convenient for daily maintenance, and solves the problems of high failure rate and difficult maintenance caused by the existing arrangement inside the open-drain caisson; a one-way valve is arranged in the open-drain caisson to avoid the problem of sewage backflow into the open-drain caisson from the inlet pipeline of the open-drain pump arranged at a high place, so that the inlet pipeline of the open-drain pump is kept full of liquid. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:
[0023] Figure 1 This is a schematic diagram of the connection structure of an open discharge system according to an embodiment of the present utility model;
[0024] Figure 2This is a schematic diagram of the internal structure of a one-way valve in an open discharge system according to an embodiment of the present invention;
[0025] Figure 3 yes Figure 2 Schematic diagram of the radial structure of the position of the limit step in the one-way valve shown. DETAILED DESCRIPTION
[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.
[0027] like Figure 1 As shown, an open drainage system according to one embodiment of the present invention may include an open drainage caisson 10, an open drainage pump 20, a one-way valve 30, and a discharge pipeline 40. The open drainage caisson 10 is located underwater and receives oily wastewater discharged from the open drainage manifold. The open drainage pump 20 is connected to the outlet of the open drainage caisson 10 via the discharge pipeline 40 and is used to discharge the floating oil accumulated in the open drainage caisson 10 into a closed drainage tank for further treatment.
[0028] In particular, the present invention installs the open-drain pump 20 on the deck of the seawater platform (typically an 8.5-meter deck), instead of installing it inside the open-drain caisson 10 as in the prior art. This reduces the frequent malfunctions and other issues associated with installations inside the open-drain caisson 10. When the open-drain pump 20 pumps out the floating oil, it pumps the floating oil inside the open-drain caisson 10 upward. To prevent the floating oil from flowing back into the open-drain caisson 10, a one-way valve 30 is installed inside the open-drain caisson 10.
[0029] The open displacement pump 20 is preferably an air-operated diaphragm pump.
[0030] The pneumatic diaphragm pump is powered by compressed air. As needed, the open discharge system may further include an air source 2 and an air source pipeline 50 located on the deck; the air source pipeline 50 is connected between the air source 2 and the air source inlet of the open discharge pump 20. The air source 2 may further include an air compressor, which delivers compressed air to the pneumatic diaphragm pump through the air source pipeline 50 to drive the pneumatic diaphragm pump.
[0031] Specifically, within the open-drain caisson 10, the outlet of a one-way valve 30 is matingly connected to the outlet of the open-drain caisson 10, while the inlet of the one-way valve 30 communicates with the inner cavity of the open-drain caisson 10. When the open-drain pump 20 is pumping, the floating oil in the open-drain caisson 10 enters the one-way valve 30 through its inlet, then flows through the outlet of the one-way valve 30 and the outlet of the open-drain caisson 10 into the discharge pipeline 40, and then along the open-drain pipeline into the open-drain pump 20. The outlet of the open-drain pump 20 can be connected to a closed-drain tank, where the floating oil is delivered to the closed-drain tank 1 for further processing.
[0032] The discharge line 40 also forms the inlet line of the open drainage pump 20, conveying the floating oil and other substances in the open drainage caisson 10 to the open drainage pump 20. The one-way valve 30 provided in the open drainage caisson 10 prevents the problem of sewage backflow from the inlet line of the open drainage pump 20 installed at a high altitude into the open drainage caisson 10, and keeps the inlet line of the open drainage pump 20 full of liquid.
[0033] In some embodiments, as Figure 2 and Figure 3 As shown, the one-way valve 30 may structurally include a valve body 31 and a valve ball 32 movably disposed within the valve body 31. The valve body 31 has an inlet end 311 and an outlet end 312 at opposite ends thereof, respectively. The inlet end 311 forms the inlet of the one-way valve 30, and the outlet end 312 forms the outlet of the one-way valve 30. The valve ball 32 may move back and forth between the inlet end 311 and the outlet end 312 within the valve body 31.
[0034] The inlet end 311 of the valve body 31 is provided with a spherical step 33 on the inner side thereof, which mates with the outer circumference of the valve ball 32. When the valve ball 32 moves to the inlet end 311, it abuts against the spherical step 33, closing the inlet end 311 and preventing liquid entering through the inlet end 311 from flowing back out of the inlet end 311. The valve body 31 is also provided with a limiting step 34 to constrain the travel of the valve ball 32. The limiting step 34 is located within the valve body 31 near the outlet end 312, preventing the valve ball 32 from moving against the outlet end 312 and affecting the discharge volume of the outlet end 312. There can be one or more limiting steps 34, which are provided on the inner wall of the valve body 31 and protrude toward the central axis of the valve body 31.
[0035] like Figure 3 As shown, it shows an embodiment of the limiting step 34. In this embodiment, the three limiting steps 34 are arranged radially, with gaps between adjacent limiting steps 34, and gaps are also left at the centers of the three limiting steps 34. While limiting the movement of the valve ball 32, the end will not be closed and the outflow of liquid will not be affected.
[0036] In some embodiments, Figure 1 As shown, the open discharge system further includes a filter 60 , which is disposed on the discharge pipeline 40 to filter the floating oil and other liquids passing through the discharge pipeline 40 , remove impurities therein, and protect the open discharge pump 20 at the rear end.
[0037] Preferably, the filter 60 is a basket filter.
[0038] In some embodiments, the open drainage system further includes a first cooling and flushing line 71 connected between the freshwater source 3 and the water inlet of the open drainage caisson 10. This first cooling and flushing line 71 is used to receive fresh water, which is then fed into the open drainage caisson 10 and mixed with the oily wastewater therein, thereby reducing the internal temperature of the open drainage caisson 10. This first cooling and flushing line 71 can also be used for routine maintenance of the open drainage caisson 10 by flushing it with fresh water.
[0039] The flushing outlet of the first cooling flushing pipeline 71 may be directly opposite to the inlet of the one-way valve 30 , and the one-way valve 30 may also be flushed to prevent the one-way valve 30 from being stuck and corroded.
[0040] The open discharge system also includes a second cooling and flushing line 72 connected between the freshwater source 3 and the filter 60. This line is used to receive fresh water, which is fed into the filter 60 through the water inlet at the top of the filter 60 to flush the filter 60. The fresh water can also reach the open discharge pump 20 through the discharge line 40, allowing for routine maintenance and servicing such as flushing the open discharge pump 20, thereby extending the service life of the open discharge pump 20.
[0041] To reduce installation costs, the first cooling and flushing pipeline 71 and the second cooling and flushing pipeline 72 are connected to the same fresh water source 3. Further preferably, the open discharge system may further include a cooling and flushing main line 70, which is connected between the fresh water source 3 and the first cooling and flushing pipeline 71 and the second cooling and flushing pipeline 72, and diverts the fresh water source 3 to the first cooling and flushing pipeline 71 and the second cooling and flushing pipeline 72.
[0042] Specifically, if Figure 1 As shown, one end of the cooling and flushing main line 70 is connected to the fresh water source 3, and the other end is provided with a tee joint. One end of the tee joint is connected to the cooling and flushing main line 70, and the other two joints are used to connect a first cooling and flushing line 71 and a second cooling and flushing line 72, respectively. Specifically, the first cooling and flushing line 71 is connected between the water inlet of the open-discharge caisson 10 and one end of the tee joint, and the second cooling and flushing line 72 is connected between the filter 60 and the other end of the tee joint.
[0043] Furthermore, a first ball valve 81 is provided on the cooling and flushing main line 70 to control the on / off and flow rate of the cooling and flushing main line 70. A second ball valve 82 is provided on the first cooling and flushing line 71 to control the on / off and flow rate of the first cooling and flushing line 71. A third ball valve 83 is provided on the second cooling and flushing line 72 to control the on / off and flow rate of the second cooling and flushing line 72.
[0044] The pipelines in the open discharge system of the present invention, including the discharge pipeline 40, are preferably made of stainless steel pipes, and more preferably SS316 stainless steel pipes.
[0045] When using the open drainage system of the present invention, the suction section of the open drainage pump 20 (including the discharge line 40) is completely filled with water before the pump is started. After the pump is started, the floating oil in the open drainage caisson 10 is pumped out, and the oil contaminated by the seawater platform is promptly recovered, eliminating the possibility of leakage into the sea and preventing the potential for major environmental pollution accidents.
[0046] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. An open exhaust system, characterized in that: include: Open drainage caisson, set underwater, used to receive oily wastewater; a one-way valve disposed in the open-discharge caisson, wherein the outlet of the one-way valve is cooperatively connected to the outlet of the open-discharge caisson, and the inlet of the one-way valve is in communication with the inner cavity of the open-discharge caisson; Open discharge pump, installed on the deck; A discharge pipeline is connected between the outlet of the one-way valve and the inlet of the open-discharge pump.
2. The open exhaust system according to claim 1, characterized in that: The open-displacement pump is a pneumatic diaphragm pump.
3. The open exhaust system according to claim 2, characterized in that: The open discharge system further comprises an air source and an air source pipeline arranged on the deck; the air source pipeline is connected between the air source and the air source inlet of the open discharge pump.
4. The open exhaust system according to any one of claims 1 to 3, characterized in that: The open exhaust system further includes a filter disposed on the exhaust line.
5. The open exhaust system according to claim 4, characterized in that: The filter is a basket filter.
6. The open exhaust system according to claim 4, characterized in that: The open discharge system also includes a first cooling flush line connected between a fresh water source and a water inlet of the open discharge caisson.
7. The open exhaust system according to claim 6, characterized in that: The open drain system also includes a second cooling flush line connected between a fresh water source and the filter.
8. The open exhaust system according to claim 7, characterized in that: The open discharge system also includes a cooling and flushing main line; one end of the cooling and flushing main line is connected to a fresh water source, and the other end is provided with a three-way joint; The first cooling and flushing pipeline is connected between the water inlet of the open-row caisson and one joint of the three-way joint, and the second cooling and flushing pipeline is connected between the filter and the other joint of the three-way joint.
9. The open exhaust system according to claim 8, characterized in that: The open discharge system further includes a first ball valve disposed on the cooling and flushing main line, a second ball valve disposed on the first cooling and flushing line, and a third ball valve disposed on the second cooling and flushing line.
10. The open exhaust system according to any one of claims 1 to 3, characterized in that: The one-way valve comprises a valve body and a valve ball movably arranged in the valve body; An inlet end and an outlet end are respectively provided at opposite ends of the valve body. A spherical step that matches the outer circumference of the valve ball is provided on the inner side of the inlet end. A limiting step that restricts the valve ball in the valve body is provided near the outlet end.