RU79535U1 - RESERVOIR FOR RECEIPT, STORAGE AND DISCHARGE OF RAW OIL CONTAINING MECHANICAL IMPURITIES - Google Patents

Abstract

The proposed utility model relates to means for receiving and storing liquid 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 on a vertical steel cylindrical tank (PBC) for dark petroleum products having additional equipment, which includes a tank for receiving, storing and dispensing crude oil containing dissolved gas, two sump filters are additionally installed in the PBC receiving pipe, made in in the form of a truncated cone connected in parallel and equipped with pressure gauges, pipelines with stop valves and valves to remove mechanical impurities. The utility model works as follows. Through the intake pipe and the corresponding valve, crude oil with mechanical impurities enters the first filter sump. Mechanical impurities due to gravitational forces are deposited at the bottom of the sump. The filling of the filter is determined using the difference in pressure gauges installed before and after the sump. When filling the first filter of the sump using valves, the oil is sent to the second filter. In this case, mechanical impurities from the first sump are removed through the pipeline by opening the corresponding valve. After passing the filter of the sump, crude oil enters the tank, in which, after preliminary deposition, the amount of mechanical impurities is significantly reduced. Upon receipt of crude oil with a high gas content in the tank, a foam layer forms, which, having reached the roof of the tank, raises the poppet valve and through the pipeline enters the rubber-fabric tank, where the oil foam settles and degasses.

Simultaneously with the receipt of crude oil by means of internal heaters, hot steam is supplied to the RVS. Due to its higher density, water is deposited on the bottom of the tank. After that, the drain valve opens for pumping water through the pipeline. Having determined the water level in the tank using siphon taps, the operator opens the corresponding valve for pumping crude oil. Preliminary removal of mechanical impurities in the sump filter, as well as pumping crude oil, separating and draining water into a separate tank, can reduce the overall oil level in the RCS, which significantly reduces the likelihood of the release of oil foam. The proposed utility model makes it possible to solve the problem of increasing the efficiency of reception and delivery of crude oil containing mechanical impurities, as well as increasing the useful capacity of the RCS, reducing the error in measuring the volume of oil and the time for cleaning the tank.

Description

The proposed utility model relates to means for receiving and storing oil and oil products, and can be used in the oil industry for the reception, storage and delivery of crude oil containing mechanical impurities.

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 mechanical impurities contained in the crude oil enter the tank and settle to its bottom. At the same time, a dense sediment layer is formed unevenly on the bottom of the tank. The height of the sediment, consisting of mechanical impurities, can reach values of more than one meter. The maximum height is observed near the receiving valve of the tank.

The sediment layer in the vertical steel tank (PBC) leads to the following negative consequences in the operation of the oil company:

1. Reduces the useful capacity of the tank;

2. Increases the error in measuring the amount of oil in the tank;

3. Increases tank cleaning time.

4. Increases the likelihood of oil overflow when filling the PBC. These shortcomings cause material damage to the oil company, complicate oil metering, and also increase the fire hazard of the facility.

Known reservoir for receiving, storage and separation of crude oil from water [2].

In this utility model, a tank for dark oil products equipped with heaters is additionally installed

dispensing pipes, siphon taps and drainage pipe. 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. The recommended values of the conditional passages of the nozzles are 100, 150, 200 and 250 mm [3]. 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 [4]. The use of the second and third additional dispensing nozzles located above the main dispensing nozzle allows us 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 the 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 crude oil is:

1. The absence of a device that significantly reduces the ingress of solids into the tank.

The proposed utility model allows us to solve the problem of increasing the efficiency of the reception of crude oil containing mechanical impurities in RCS in order to further prepare it for the production of commercial oil. Also, the sediment consisting of mechanical impurities at the bottom of the tank is significantly reduced.

The solution to this problem is achieved by the fact that the reservoir for receiving, storing and dispensing crude oil contains mechanical impurities having equipment installed on a vertical steel tank for dark petroleum products and additional equipment that includes a reservoir for receiving, storing and dispensing crude oil containing dissolved gas, according to a utility model, two sump filters are additionally installed on the receiving pipe of the tank, made in the form of a truncated cone connected in parallel and both udovannyh gauges, conduits with shut-off valves and valves for removing sludge in order directional movement of deposited particles due to gravitational forces down the settler and a filter significantly reducing ingress of solids into the reservoir.

These signs are essential for solving the utility model problem, since the efficiency of receiving crude oil containing mechanical impurities is increased, and the sediment content in the tank, the error in measuring the volume of oil and the time for cleaning the tank are reduced.

The essence of the utility model is illustrated by drawings (figure 1, figure 2), which depict: a section and a top view of the tank and filter sumps.

The proposed tank 1 having a receiving and distributing nozzles 2, a pipeline for the delivery of oil 3, valves 4, light and metering hatches

5,6, a ventilation pipe 7, a breathing valve 8, a pipe for water drainage 9 with a drain valve 13, a manhole 10, internal sectional heaters 11 with hot steam 14, siphon taps 12, two sump filters 16 are installed on the receiving pipe 15, with pressure gauges 17. Filters of sedimentation tanks are equipped with pipelines 18 and valves 19 to remove mechanical impurities 20. Valves 21 are installed on pipeline communications of filters of sedimentation tanks, which allow settling tanks to be filled with mechanical impurities and turn on the second sump.

The utility model works as follows. Through the intake pipe 15 and the corresponding valve 4, crude oil with mechanical impurities enters the first filter sump 16. Mechanical impurities 20 due to gravitational forces are deposited on the bottom of the filter sump. The filling of the filter is determined using the difference in the readings of the pressure gauges 17 installed before and after the sump. When filling the first filter of the sump using valves 21, the oil is sent to the second filter. In this case, mechanical impurities from the first sump are removed through the pipe 18 by opening the valve 19.

After passing the filter of the sump, crude oil enters the tank 1, which significantly reduces the amount of solids.

Simultaneously with the receipt of crude oil by means of internal heaters 11, hot steam 14 is supplied to the PBC. Water due to its higher density is deposited on the bottom of the tank. After that, the drain valve 13 is opened for pumping water through the pipeline 9. Having determined the water level 22 in the tank using siphon taps 12, the operator opens the necessary valve 4 of an additional dispensing pipe 2 for pumping crude oil.

In the process of oil delivery, the operator periodically determines the water level in the tank and regulates the oil pumping process using

additional and main dispensing pipes 2, corresponding valves 4.

Preliminary removal of solids in the filter sump, as well as pumping crude oil, separation and drainage of water into a separate tank can reduce the overall oil level in the RCS. The proposed utility model allows us to solve the problem of increasing the efficiency of reception and delivery of crude oil containing mechanical impurities. Purification of oil from mechanical impurities allows you to:

1. Increase the capacity of the PBC.

2. To reduce the error in measuring the volume of oil and the time of cleaning the tank.

3. To increase the economic efficiency of using the tank.

Literature

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

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

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

4. 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.

Claims (1)

A reservoir for receiving, storing and dispensing crude oil containing mechanical impurities, having equipment installed on a vertical steel tank for dark petroleum products, and additional equipment that includes a reservoir for receiving, storing and dispensing crude oil containing dissolved gas, characterized in that two filter sumps are additionally installed on the receiving pipeline of the tank, made in the form of a truncated cone, connected in parallel and equipped with pressure gauges, pipelines with pore valves and valves to remove sediment, with the aim of the directed movement of the deposited particles due to gravitational forces down the filter sump and significantly reduce the ingress of mechanical impurities into the tank.