CN102493698A - Novel sink type oil storage device - Google Patents

Abstract

The invention discloses a novel sink type oil storage device. The conventional petroleum storage tanks are generally constructed in intertidal zones and are extremely easy to settle along the longitudinal arrangement direction of tank bodies, and the tank bodies can be distorted by differential settlement. The device comprises a storage tank, strengthening walls and strengthening buffer systems, wherein the strengthening walls are uniformly distributed at the periphery of the barrel-shaped storage tank; traction devices are arranged on the tops of the strengthening walls; and the strengthening buffer systems are arranged on the side walls of the strengthening walls and are arranged between the strengthening walls and the storage tank. The device has a simple structure and is convenient to use; an extremely deep foundation is not required to be specially constructed for the storage tank; and the normal use of the whole storage tank cannot be influenced even the foundation is subjected to the differential settlement.

Description

A new sunken oil storage device

technical field

The invention belongs to the technical field of petroleum storage and relates to a novel sunken oil storage device, which is mainly used for storage of petroleum and its processed products.

Background technique

All developed countries are building their own strategic oil reserves. The United States has the largest reserves in the world, exceeding 100 million tons. There are not only strategic oil reserves, but also commercial reserves, not only crude oil, but also refined oil reserves. The same is true for Japan, because almost all of Japan's energy sources depend on foreign countries, and the impact of foreign oil on the entire Japanese economy is very critical. Therefore, the amount stored in Japan is very large. The storage ratio is generally at least three months for these developed countries, and some reach half a year's entire import volume. China's reserves are still very small. To meet a safe standard, it needs to be stored for at least three months. Currently, the import volume is almost 200 million tons, and at least 50 million tons of imports are required to ensure the safety of our reserves. But three months is still not enough. Once there is a major turbulence in the world or the oil crisis like 1979 and 1971, only three months will not be enough to satisfy China's oil security. At the same time, only with sufficient reserves can we stabilize oil speculation and stabilize oil prices, which is of far-reaching significance to China as a major manufacturing country.

The strategic oil reserve is the most important part of a country's energy security system. China now imports more than 50% of its oil from abroad. If there is not enough oil stored, once there is a problem with the oil passage or oil supply, such as in Hall If a war breaks out in the Muzi Strait, a large amount of oil supply will be cut off, and China's economy will be paralyzed if there is not enough oil. Therefore, in order to ensure the safe, stable and continuous operation of the economy, it is necessary to ensure sufficient security strategic reserves, not only strategic reserves, but also commercial reserves.

At present, the main international factors that threaten my country's oil security are: increasing dependence on crude oil imports, increasing the risk of oil supply; due to various natural or man-made reasons, there may be short-term and partial international supply shortages; The threat or influence of competitors on our nation's oil supplies.

China's strategic oil reserve is to deal with emergencies and prevent oil supply risks, and it is one of the important measures to "ensure national energy security".

Since 2003, China began to prepare for the construction of oil reserve bases. The preliminary plan is to complete the construction of hardware facilities such as oil depots in three phases within 15 years. The reserves are roughly: the first phase is 10 million to 12 million tons, which is approximately equal to my country's 30-day net oil imports; the second and third phases are 28 million tons respectively. The real opening of the domestic strategic oil reserve should begin with the completion and delivery of the first national oil reserve base - Zhenhai Base in October 2006. The Zhenhai base is located in Ningbo City, Zhejiang Province, with a construction scale of 5.2 million cubic meters and a total of 52 oil storage tanks. In addition to Zhenhai, the Zhoushan, Huangdao and Dalian projects are also included in the first phase of the national plan, with storage capacities of 5 million cubic meters, 3.2 million cubic meters and 3 million cubic meters respectively.

Most of the country's oil reserve bases are built by the sea, and the transportation is convenient, which is conducive to oil imports. Most of the imported oil is transported by large tankers. At the port terminal, it is directly transported to the storage base through pipelines, which not only reduces costs, but also reduces the possibility of accidents during transportation. However, since oil imports are carried by large tankers, the port must be deep, so many oil storage tanks are built on tidal flats. Due to the relatively deep silt along the beach, the rock formation above the ground is also relatively deep (generally 70-120m), which is not conducive to piling. The pile foundation is slender and prone to lateral deflection. In addition, the pile foundations between adjacent tanks affect each other, which can easily cause serious longitudinal settlement along the tank body, making the settlement uneven and causing the tank body to twist. If the correction cannot be completed and the tank body is distorted, the oil storage operation cannot be carried out, resulting in the scrapping of the entire storage tank.

Contents of the invention

The purpose of the present invention is to solve the problem that due to the relatively deep silt along the beach and the relatively deep rock formations (generally 70-120m) above the ground, it is not conducive to piling. The longitudinal settlement of the tank arrangement is relatively serious, which makes the settlement uneven and causes the problem of tank distortion. If the oil storage tank cannot complete the deviation correction and the tank body is distorted, the oil storage operation cannot be carried out, and the entire storage tank is scrapped.

The technical scheme that the present invention solves technical problem to take is:

A novel submerged oil storage device includes a storage tank, a centralizing wall, and a centralizing buffer system. A centralizing wall is evenly distributed around the barrel-shaped storage tank, an upper traction device is installed on the top of the centralizing wall, and a centralizing buffer system is installed on the side wall of the centralizing wall, and the centralizing buffer system is arranged between the centralizing wall and the storage tank.

The outer top of the storage tank is provided with an upper traction hole, the upper traction device is connected with the upper traction hole through a cable, the outer bottom of the storage tank is provided with a lower traction hole, and the lower traction hole is connected with the lower traction device arranged under the storage tank through a cable .

The righting buffer system includes a plurality of righting buffer devices arranged vertically, each righting buffer device includes a fixed pulley system and a spring buffer mechanism, the fixed pulley in the fixed pulley system contacts the storage tank, and the fixed pulley system The base of the fixed pulley in the pulley system is connected with one end of the spring buffer mechanism, and the other end of the spring buffer mechanism is connected with the centralizing wall.

The storage tank is equipped with an oil pump and an air pump, the oil pump is connected to the oil suction filter system at the bottom of the storage tank through a pipeline, and the air pump is connected to the nozzle at the top of the storage tank through a pipeline.

Beneficial effects of the present invention: the structure of the device is simple, easy to use, and there is no need to make a deep foundation for the storage tank. Even if the foundation subsides unevenly, it will not affect the normal use of the entire storage tank. Affects the use of the entire tank. The device also has the functions of cooling and heat-insulating the oil inside the storage tank and protecting against lightning. Since most of the storage tank is in the water, the overall temperature will not exceed the water temperature. In the scorching summer, there is no need to consider the explosion accident caused by the high temperature of the oil tank, and there is no need to spray the oil tank to cool down . Even if an accident occurs in this oil tank, it will not endanger the surrounding oil tanks. Because it is in an isolated water environment, even if there is oil leakage, it will not pollute the surrounding environment. A circle of fences can be arranged outside each oil tank. Oil boom, the oil will be trapped in the oil boom, which will not cause environmental pollution, and the construction workers will easily recycle it.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Figure 2 is a section view of the centralizing wall;

Figure 3 is a top view of the floating oil storage tank;

Figure 4 is a sectional view of a floating oil storage tank;

1- embankment, 2- water, 3- centralizing wall, 4- fixed pulley system, 5- centralizing buffer system, 6- cable, 7- cable hole, 8- storage tank, 9- cable, 10- fixed pulley system, 11 -fixed pulley base, 12-fixed pulley, 13-spring buffer mechanism, 14-fixed pulley, 15-fixed pulley base, 16-oil suction filter system, 17-oil pump, 18-oil suction pipe, 19-nitrogen nozzle, 20-nitrogen pipeline, 21-charge (pump) air pump, 22-nitrogen, 23-petroleum.

Detailed ways

The principle and structure of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1 and Figure 4, the sunken oil storage device is in an isolated water environment surrounded by a dam 1, where the water 2 can be seawater or fresh water. The entire oil storage process of the sunken oil storage device is as follows:

First of all, when the storage tank 8 starts to input oil, the storage tank 8 floats above the water surface, the bottom is connected with the fixed pulley system 10 through the cable 9, and the top is connected with the fixed pulley system 4 through the cable hole 7, the cable 6 (by the fixed pulley base 11 and fixed pulley 12 form) together. By controlling the pulling force of the fixed pulley system 4, 10 on the storage tank, the buoyancy and gravity of the storage tank 8 can be balanced, and ensure that the pulling force of the fixed pulley system 4, 10 is in a relatively small range (relatively safe) In the range). The storage tank 8 can ensure its horizontal direction under the restraint of the buttressing wall 3, will not move, and is within a safe range. Petroleum 23 is injected into the storage tank 8 according to a certain flow through the oil pump 17 through the oil suction pipeline 18 and the oil suction filter system 16. At this time, the pulling force of the fixed pulley system 4 and 10 is guaranteed to be constant or within a safe range, and the air pump 21 passes through The nitrogen nozzle 19 and the nitrogen pipeline 20 are extracted by a certain amount of gas to ensure that the pressure in the storage tank 8 is normal (safety range). As the amount of oil in the storage tank 8 increases, the storage tank 8 will slowly sink, the oil and gas level will rise slowly, and the mixture of nitrogen 22 and oil and gas will be discharged slowly. After the oil is injected into the storage tank 8 rated range, stop injecting. At this time, ensure that the pulling force of the fixed pulley system 4, 10 is within a safe range.

Secondly, during the oil storage process, the air charging (exhausting) pump 21 adjusts the oil storage pressure inside the storage tank 8 . As the oil in the storage tank 8 increases, the gas pressure inside also increases. At this time, the exhaust (charge) air pump starts to work, and exhausts air at a certain flow rate to control the pressure inside to reach a certain safety range. During the process of storing oil, the storage tank 8 will be subjected to a certain amount of wind force, and the left and right displacements will occur. At this time, the centralizing wall 3 will play the role of buffering and centralizing the storage tank 8 . There are a lot of centralizing buffer systems 5 distributed on one side of the centralizing wall (composed of spring buffer mechanism 13, fixed pulley base 15 and fixed pulley 14), which can absorb the energy in the horizontal movement of storage tank 8 to ensure its stability.

Finally, when the storage tank 8 is in the process of outputting oil, the pulling force of the fixed pulley system 4, 10 is at a certain constant value or within a safe range, the oil is output through the oil pump 17, and the air pump 21 is charged (exhausted) and starts to work. Fill the storage tank with nitrogen, adjust the pressure inside to be within a safe range and facilitate some output. Storage tank 8 can rise slowly under the buoyancy of water and the effect of fixed pulley system 4,10. During the whole process, the fixed pulley system 4,10 is in a relatively safe tension range. Finally, when all the oil in the oil storage tank 8 is pumped out, it will be in a relatively stable and safe state.

As shown in Figure 2, the cross-sectional structure of the whole centralizing wall 3, it can be seen that one side of the centralizing wall is composed of a buffer mechanism and a block of pulleys. When the supporting wall 3 is impacted in the horizontal direction, the buffer spring structure will absorb the energy generated by the impact, so that the entire storage tank is in a relatively safe moving range. There is a fixed pulley system on the top of the centralizing wall 3, which is responsible for pulling the top of the oil storage tank.

As shown in Figure 3, the storage tank and the three centralizing walls are evenly distributed, and each centralizing wall has two rows of buffer mechanisms. There are two pulley system mechanisms on top of the butting wall.

As shown in Figure 4, the sectional view of the storage tank, the entire storage tank is in the shape of a barrel, with an oil pump 17 and an air filling (exhausting) pump 21 on the top. There are cable holes above and below the tank for pulling by the fixed pulley system.

Claims (1)

1. A new sunken oil storage device, comprising a storage tank, a centralizing wall, and a centralizing buffer system, characterized in that: centralizing walls are evenly distributed around the barrel-shaped storage tank, and upper traction devices are installed on the top of the centralizing wall, and centralizing The side wall of the wall is equipped with a centralizing buffer system, and the centralizing buffer system is arranged between the centralizing wall and the storage tank; The outer top of the storage tank is provided with an upper traction hole, the upper traction device is connected with the upper traction hole through a cable, the outer bottom of the storage tank is provided with a lower traction hole, and the lower traction hole is connected with the lower traction device arranged under the storage tank through a cable ; The righting buffer system includes a plurality of righting buffer devices arranged vertically, each righting buffer device includes a fixed pulley system and a spring buffer mechanism, the fixed pulley in the fixed pulley system contacts the storage tank, and the fixed pulley system The fixed pulley base in the pulley system is connected to one end of the spring buffer mechanism, and the other end of the spring buffer mechanism is connected to the centralizing wall; The storage tank is equipped with an oil pump and an air pump, the oil pump is connected to the oil suction filter system at the bottom of the storage tank through a pipeline, and the air pump is connected to the nozzle at the top of the storage tank through a pipeline.

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