RU74206U1 - RESERVOIR FOR RECEIPT, STORAGE AND DISCHARGE OF RAW OIL CONTAINING DISSOLVED GAS - Google Patents

Abstract

The proposed utility model relates to liquid storage means and can be used in the oil industry for receiving, storing and dispensing oil and viscous oil products. The solution to this problem is achieved by the fact that a vertical steel cylindrical tank (PBC) for dark oil products having additional equipment that includes a reservoir for storing the release and separation of crude oil from water; an additional pipe is installed vertically; it is equipped with a pipeline with a valve and a poppet valve SG and pillow container, which is sealingly connected to a conduit due to the flanges via the gasket and homuta.Rezervuar operates as follows. Through the inlet pipe and the corresponding gate valve, crude oil containing dissolved gas enters the PBC and is heated using internal heaters. After filling, the approximate water level in the tank is determined using siphon taps. Then opens the drain valve for pumping water. After that, the valve of the additional dispensing pipe opens, located above the water level, for pumping crude oil through the pipeline. The delivery of oil and water can reduce the overall level of oil in the tank, which significantly reduces the likelihood of an oil foam. The installation of additional equipment allows you to continuously receive and pump out crude oil with a high gas content in the tank. Oil foam in case of reaching the roof of the tank through the pipe, poppet valve, open valve and piping communications gets into rubber�

Description

The proposed utility model relates to means for storing oil and oil products, and can be used in the oil industry to receive, store and dispense crude oil containing dissolved gas.

The proposed utility model is most applicable when using crude oil. Crude oil refers to a liquid natural fossil mixture of hydrocarbons of a wide physicochemical composition, which contains water, dissolved gas, mineral salts, and mechanical impurities [1].

The gas dissolved in crude oil forms an oil foam, which is a dispersed two-phase system consisting of cells filled with gas and separated by oil films. The density of oil foam can vary widely from 0.5 to the density of the liquid to values close to the density of the gas. The height of the oil foam can reach several meters and depends on the content of dissolved gas in the oil, temperature, pressure, speed of oil supply to the tank, as well as other factors.

At certain points in time, when the oil level reaches 0.9-0.95% of the tank capacity, oil foam, through equipment leaks, flows to the roof and walls of the tank. In this case, material damage is caused to the oil company, the environment is polluted, and the fire hazard of the facility is also increased.

Known vertical cylindrical steel tank for dark petroleum products (PBC) [2]. This tank has a bottom, a wall and a fixed roof. For receiving and dispensing petroleum products, reservoirs of this type have acceptance pipes. From the outside, valves are connected to them. In order to provide “small and large” tank breaths, there is a breathing valve. On the roof of the tank

a metering hatch is installed, which serves to measure the level and take fuel samples.

To drain commercial water, a siphon valve is installed in the lower zone of the tank.

For the purpose of storing and dispensing viscous petroleum products, tanks for dark petroleum products can be equipped with internal sectional heaters.

Also on the tank there are monitoring and signaling devices (level gauges, samplers, level indicators, fire fighting devices) and other equipment (manhole, ventilation pipes, safety valves).

The disadvantages of this tank when receiving and issuing crude oil with a high gas content are:

1. Low efficiency of determining the level of the phase separation of oil-oil foam, as well as low productivity when pumping oil and water from the tank.

2. The absence of a device to prevent the release of oil foam on the roof and walls of the tank.

The closest in technical essence of the proposed utility model is a reservoir for receiving, storing and separating crude oil from water [3].

In this utility model, dispensing pipes, siphon taps and a drainage pipe are additionally installed on a tank for dark oil products equipped with heaters. In particular, instead of one dispensing pipe and one siphon valve, three dispensing pipes and three siphon valves are installed vertically at distances corresponding to the rules for constructing vertical, cylindrical, steel tanks for oil and oil products. Recommended values of conditional passages of nozzles are 100, 150,

200 and 250 mm [4]. The nozzles are equipped with valves of the corresponding diameter and piping communications.

At the same time, a drain pipe is welded to the bottom of the tank wall, which is equipped with a valve and a pipeline. Through the pipeline, water is pumped or by gravity to a separate tank, from where it is then pumped into a special well or tank.

Additional siphon taps are designed to determine the water level in the tank. The water level between siphon taps can be determined using a universal device for determining the levels of various liquids in tanks [5]. The use of the second and third additional dispensing pipes located above the main dispensing pipe allows you to solve the problem of more efficient delivery of crude oil from the proposed tank for further preparation. Installation of additional dispensing and drainage pipes, as well as siphon taps, allows continuous pumping of crude oil above the water level. In this case, simultaneously with pumping, accelerated separation of water from crude oil will occur due to the use of internal heaters, as well as drainage of water from the tank using a drain pipe, gate valve and pipeline communications.

This tank allows you to solve the problem of a constant decrease in the level of crude oil, due to the pumping of oil liquid and water using additional equipment.

The disadvantage of this tank when receiving and issuing crude oil with a high gas content is the lack of a device that prevents the release of oil foam on the roof and walls of the tank.

The proposed utility model allows us to solve the problem of increasing the efficiency of reception and delivery of crude oil with a high content of gas from RVS in order to further prepare it for the production of commercial oil. This also prevents the release of oil foam onto the roof and walls of the tank.

The solution to this problem is achieved by the fact that on the roof of the tank for receiving, storing and separating crude oil from water, an additional nozzle with a poppet valve equipped with a pipeline with a valve, as well as a rubber-fabric tank MR-4 are additionally installed. The rubber-fabric tank is hermetically connected to the pipeline using gaskets and a clamp. The MP-4 tank allows you to hold 4000 liters of fluid. The response pressure of the poppet valve is set to 0.015 MPa, which is significantly lower than the response pressure of the breathing valves of the SMDK and PPR brands installed on the tanks / 6 /. It should be noted that gauging and skylights, ventilation pipes, as well as other devices installed on the roof of the tank, must be hermetically sealed.

Installation of additional equipment allows you to continuously receive and pump out crude oil with a high gas content in the tank. Oil foam in case of reaching the roof of the tank through a pipe, a poppet valve, an open gate valve and piping communications gets into the rubber-fabric tank, where it settles and degasses. In this case, there will be no emergency situation associated with the release of oil foam on the roof and walls of the tank, as well as with the stopping of pumping equipment.

These signs are essential for solving the problem of the utility model, since the efficiency of reception and delivery of crude oil containing dissolved gas is increased, and the environmental and fire hazard of the oil facility is also reduced.

The essence of the utility model is illustrated by drawings (figure 1, figure 2, figure 3), which depict: the tank in the context and sections of additional equipment in the initial and operating position.

The proposed tank 1 having a receiving and distributing nozzles 2, a pipe for receiving and dispensing oil 3, valves 4, light and metering hatches 5, 6, a ventilation pipe 7, a breathing valve 8, a pipe for draining water 9, a manhole 10, internal sectional heaters 11, siphon taps 12 are additionally vertically mounted pipe equipped with a pipe 13 with a valve 4 and a poppet valve 14, as well as rubber-fabric tank MP-4. The rubber-fabric tank 15 is hermetically connected to the pipeline due to the flanges 16, 17 using the gasket 18 and the clamp 19.

The utility model works as follows. Through the intake pipe 2 and the corresponding valve 4, crude oil with dissolved gas enters the tank 1.

Upon receipt of crude oil with a high gas content in the reservoir, a foam layer 20 of various heights is formed. Given the extremely low density of the foam and various heights of the foam layer, it is difficult for the operator to determine when the level of the foam will exceed the maximum allowable value. Foam, reaching the roof of the tank, lifts the poppet valve 14 and through the pipe 13 enters the rubber-fabric tank 15, which is hermetically connected to the pipe by means of flanges 16, 17, gaskets 18 and clamp 19. In the tank 15, oil foam is sedimented and degassed.

At the same time, with the help of internal heaters 11, hot steam is supplied to the PBC. After that, the drain valve 4 opens for pumping water through the pipeline 9. Having determined the water level 21 in the tank, the operator opens the necessary valve 4 of the additional dispensing pipe 2 for pumping crude oil through the pipe 3.

In the process of oil delivery, the operator periodically determines the water level in the tank and regulates the process of pumping oil with the help of additional and main dispensing pipes 2, corresponding valves 4 and pipeline 3.

Pumping crude oil, separating and draining water into a separate tank or well can reduce the overall oil level in the RCS, which significantly reduces the likelihood of oil foam being thrown into the proposed additional equipment. If the foam exceeds the permissible level, it enters the rubber-fabric tank. In this regard, there is no spillage of oil on the roof and walls of the tank.

Literature

1. GOST R 51858 Oil. General specifications. M .: GOSSTANDART, 2002.

2. L. A. Matskin et al. Operation of oil depots. M .: NEDRA, 1975 - 392 p.

3. I.A. Elansky, Yu.A. Matveev. Utility Model Patent No. 62909. A reservoir for storing the release and separation of crude oil from water.

4. Rules for the construction of vertical cylindrical steel tanks for oil and oil products. M. (Resolution of the Gosgortekhnadzor of Russia No. 76) 2003.

5. I.A. Elansky, Yu.A. Matveev and others. Patent for utility model No. 46352. Device for determining the level of produced water in the tank.

6. AN Volgushev et al. Equipment for gas stations. Tutorial. St. Petersburg: Watt, 2000 - 92 s.

Claims (1)

A tank for receiving, storing and dispensing crude oil containing dissolved gas having equipment mounted on a steel vertical tank for dark petroleum products, and additional equipment that includes a tank for receiving, storing and separating crude oil from water, characterized in that on the roof additionally, a pipe equipped with a pipeline with shutoff valves and a poppet valve, as well as a rubber-fabric tank MP-4, hermetically connected to the pipeline, are additionally vertically installed When a gasket and clamp flanges in order to receive the oil foam emissions.