CN212246311U

CN212246311U - Sump oil collecting system of water tank

Info

Publication number: CN212246311U
Application number: CN202020573780.XU
Authority: CN
Inventors: 连超; 刘文铁; 张宗超; 张仁君; 王军舰; 侯仲; 费振宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-12-29
Anticipated expiration: 2030-04-16

Abstract

The utility model discloses a sump oil collecting system of a water tank, which comprises a closed discharge cabin (T-551A), a first-level water treatment process cabin (T-301A), a second-level water treatment process cabin (T-301B), a discharge cabin (T-551B), a closed discharge cabin (T-551A) and a second-level water treatment process cabin (T-301B) which are respectively communicated with a sump oil pump (P-551C) and a sump oil pump (P-551B), according to the principle that sump oil in each water tank is settled and separated and oil-water density is poor, sump oil can float on the top of the water tank and sewage is on the lower part, therefore, a special sump oil pump and a matched pipeline are additionally arranged on the top of the water tank, the floating oil is directly pumped to the subsequent flow, the liquid level of each water tank caused by the original liquid transfer is thoroughly stopped to be greatly changed, the water tank is always kept stable in liquid level, thereby ensuring that the water quality of the whole water process, and the environmental protection risk is avoided.

Description

Sump oil collecting system of water tank

Technical Field

The utility model belongs to ocean oil gas operation field specifically relates to a dirty oil that is used for floating storage and offloading unit (FPSO) water feeding technology under-deck to offshore oil gas field carries out high-efficient collection and pump sending to follow-up process flow and handles.

Background

The operation process of collecting the dirty oil in the existing oil-gas field water process cabin (as shown in figure 1) is as follows: the lower tank water of the FPSO oil system firstly enters a primary water treatment process tank (T-301A), then enters a closed discharge tank (T-551A) from a skimming tank (T-301A) which is 16.8 meters away from the bottom, and then is back-pressed to the T-301B from a skimming pipeline of a secondary water treatment process tank (T-301B) to the T-551A, and finally is pumped to a water system by a production water pump (P-301). From the view of the process tank flow of the water system, T-301A is basically oil-free, the oil in the lower tank water is separated in T-551A, and a part of floating oil is accumulated in T-301B after a little long time. In order not to influence the normal operation of the water system, the liquid transferring work is carried out at intervals. Firstly, T-301A/B is communicated with a P-301 inlet pipeline, the liquid level of the T-301A/B is reduced to below 14.8 m of a T-301B oil skimming groove, T-551A is isolated independently and no liquid is fed, then P-551A is used for transferring all dirty oil in T-551A to T-101A, the liquid level of the T-301B is raised to above 14.8 m when the liquid level of the T-551A is lower than 14.8 m, floating oil on the upper portion of the T-301B is skimming into the T-551A, and a ruler is used for reducing the liquid level of the T-301B to below 14.8 m after determining that the upper portion of the T-301B is oilless.

And after the closed discharge cabin T-551A is evacuated, communicating the T-551A/B according to the situation to reduce the liquid level of the T-551B, then increasing the liquid level of the T-301A/B to supplement the liquid for the T-551A to a normal liquid level, disconnecting the hydraulic butterfly valve from the T-301A to the P-301, and recovering the flow of the water treatment process cabin. The whole liquid transferring process lasts for more than 12 hours, and in the period, because the water in the lower cabin enters a water system without fully settling, the water quality is too poor, so that great pressure is caused to the water system, and the discharged seawater faces the danger of exceeding the standard. Particularly, in recent years, along with the large pump extraction of oil fields, the frequency of liquid transfer is shortened from one month to one half month once, and then to the current one week once, in the liquid transfer process, the water quality fluctuation of the whole water system is very large, and great pressure is caused on whether the final seawater discharge can reach the standard or not.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a sump oil collecting system that treatment effect is good, the treatment effeciency is high, water stabilization.

In order to solve the technical problem, the utility model discloses a technical scheme be: a sump oil collecting system for a water tank comprises a closed discharge tank (T-551A), a primary water treatment process tank (T-301A), a secondary water treatment process tank (T-301B) and an open discharge tank (T-551B), wherein the closed discharge tank (T-551A) and the secondary water treatment process tank (T-301B) are respectively communicated with a sump oil pump (P-551C) and a sump oil pump (P-551B).

Further, an outlet pipeline of the sump oil pump is communicated with a primary oil process tank (T-101A).

Implement the technical scheme of the utility model, dirty oil is through the settlement separation and because the principle of profit density difference according to each water bay, and dirty oil can float at the under-deck top, and sewage is in the lower part, so the design sets up special sump oil pump and supporting pipeline at the cabin top, directly extracts the oil slick to follow-up flow, thoroughly stops each water bay liquid level that originally changes liquid and cause and changes by a wide margin, makes the water bay remain the liquid level stability all the time to ensure that the quality of water at different levels of whole water technology system is up to standard, stop the environmental protection risk.

Drawings

Fig. 1 is a schematic structural diagram of a sump oil collecting system in a water tank in the prior art.

Fig. 2 is a schematic structural diagram of a sump oil collecting system of a water tank.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in figure 2, the sump oil collecting system of the water tank consists of a closed discharge tank (T-551A), a primary water treatment process tank (T-301A), a secondary water treatment process tank (T-301B), an open discharge tank (T-551B), a sump oil pump (P-551C) and a sump oil pump (P-551B). The closed discharge cabin (T-551A) and the secondary water treatment process cabin (T-301B) are respectively communicated with the dirty oil pump (P-551C) and the dirty oil pump (P-551B), the dirty oil pump is driven electrically, and a matched start-stop control screen is used as a main body of the dirty oil collecting device and also used for providing power for collecting dirty oil. The bilge is provided with a dirty oil pump (P-551C) and a dirty oil pump (P-551B) at the top and a dirty water pump (P-551) at the bottom.

The dirty oil pump suction inlet device is formed by modifying and upgrading a reserved port on the top of an original process cabin, and an inlet channel for collecting dirty oil by a dirty oil pump is realized through the combination of matched pipelines. According to the height of dirty oil moisture content, dirty oil pump export pipeline designs two to: when the water content is low, the first-stage oil process cabin (T-101A) is removed, and when the water content is high, the first-stage oil process cabin (T-551A) is removed, and after the continuous sedimentation and separation of the first-stage oil process cabin (T-551A), the first-stage oil process cabin (T-101A) is removed, and the first-stage oil process cabin (T-551A) is pumped to (.

The utility model discloses sump oil collecting system's in sump advantage is:

1. the efficiency of sump oil collection and treatment in the water process cabin is greatly improved, the original process needs to be finished for 12 hours each time, after the new device is applied, only 6 hours are needed each time, and the working efficiency is doubled;

2. greatly prolonging the period of sump oil collection treatment in the water process tank, and reducing the collection frequency from once per week to once per half month;

3. the operating liquid level of the water process cabin does not need to be greatly reduced, the effective cabin capacity of the water process cabin is fully utilized, and no negative influence is caused on the water quality in the cabin in the dirty oil collecting process, so that the stability of the water quality of the water process cabin and the subsequent process is ensured, and the generation of environmental protection accidents is fundamentally avoided;

4. in the process of collecting the dirty oil, the water quality of the system is stable, so that the extra and large amount of injected medicament is not needed, and the medicament injection cost is saved during the operation of collecting the dirty oil each time.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. The utility model provides a sump oil collecting system in sump, includes row's of shutting cabin (T-551A), first grade water treatment process cabin (T-301A), second grade water treatment process cabin (T-301B), drives row cabin (T-551B), its characterized in that: the closed discharge cabin (T-551A) and the secondary water treatment process cabin (T-301B) are respectively communicated with a dirty oil pump (P-551C) and a dirty oil pump (P-551B).

2. The sump oil collection system of claim 1, wherein: and an outlet pipeline of the sump oil pump is communicated with a first-stage oil process tank (T-101A).