RU116856U1 - INSTALLATION FOR THE PROCESSING OF BARN HYDROCARBONS - Google Patents

Abstract

The proposed utility model relates to the oil industry and can be used to process obsolete hydrocarbons stored in open barns at oil production facilities. The purpose of the proposed utility model is to obtain salable oil from obsolete hydrocarbons. A barn hydrocarbon processing unit, including an open barn with feedstock, a line with a pump for supplying raw materials from the barn to a mixing tank with crude oil, a line with a heat exchanger for feeding into a mixing tank with crude oil, a line with a pump for pumping the mixture into a buffer tank with a heat exchanger for heating the compounded mixture, a line with a pump for feeding the heated mixture to the decanter, a line for discharging solid particles from the decanter, a line for draining oil from the decanter, a line for draining water from the above tanks and a deck tera, characterized in that the bypass line between the pump and the decanter is set high frequency current generator. Bibl. 2, Fig. 3

Description

The proposed utility model relates to the oil industry and can be used to process obsolete hydrocarbons stored in open barns at oil production facilities.

It is known that during oil production in the fields due to equipment accidents, gusts of pipelines, etc., accumulations of hydrocarbons are formed in the so-called barns. The storage period of these hydrocarbons is significant, in connection with which the hydrocarbons are oxidized and aged, various mechanical impurities, sand, humus, etc. are introduced into them. The processing of such hydrocarbons is a significant technological difficulty.

To obtain marketable oil from stored hydrocarbons, a technology is known based on their heating, mixing with low-watered crude oil (compounding), introduction of chemicals and centrifugation in industrial decanters / 1 /. According to this technology, hydrocarbons with heating up to 40 ... 50ºС are fed into a mixing tank, into which crude low-water crude oil is also heated up to 90ºС. A mixture of hydrocarbons with oil is fed into a buffer tank, in which it is additionally heated to a temperature of 90 ° C and pumped into a 3-phase decanter. Centrifugation allows you to separate the mechanical impurities and water from oil and feed the latter into the 2nd buffer tank and then again to another decanter, in which the previously introduced fresh water for desalination is separated.

The described technology of double centrifugation is ineffective in view of the fact that in order to obtain marketable oil, it is necessary to bring the viscosity of the feedstock before centrifugation to values of 40 ... 50 MPa s. Figures 1 and 2 show the effect of the viscosity of the liquid supplied to the decanter on the quality of the oil after centrifugation according to the content of water and suspended solids.

It can be seen that with a viscosity of more than 40 ... 50 mPas, the quality of the oil no longer corresponds to commodity indicators.

To process trap oils, a method is known for exposing them to high frequency currents (2.450 MHz) / 2 /. On the one hand, they significantly increase the temperature of the liquid when passing through the irradiators, on the other hand, they destroy the armor shells of water droplets in a hydrocarbon medium. However, exposure to obsolete hydrocarbons by electric fields alone does not allow them to be processed to marketable conditions and can only be used when combined with heat and a centrifugal field. This effect reinforces each other with the appearance of a synergistic effect.

The purpose of the proposed utility model is to increase the centrifugation efficiency of compound hydrocarbons.

This goal is achieved by the fact that in the known technology, including heating obsolete hydrocarbons in heat exchangers, mixing them with low-water crude oil, introducing demulsifiers and centrifuging in decanters, a bypass line with a high current generator is installed between the buffer tank for heating the compound mixture and the decanter frequency.

Figure 3 shows a diagram of a utility model. The scheme includes an open barn 1 with feedstock, a line 2 with a pump 3 for feeding into the mixing tank 4, a feed line 5 of crude oil with a heat exchanger 6, a pump 7 for feeding the mixture into a buffer tank 8 with a water discharge line 9, a heat exchanger 10 with a discharge line water 11, pump 12, feeding the heated mixture to the decanter 12, a high-frequency current generator 14, a line for discharging solid particles 15, water 16 and an oil outlet 17, a sampling line 18.

The operation of the installation is as follows.

Hydrocarbons from the barn 1 are taken through line 2 by a pump 3 to a tank 4. Into the same tank, through a heat exchanger 6, line 5 receives crude low-water crude oil at a temperature of about 90 ° C. Mixed hydrocarbons pump 7 is pumped into the buffer tank 8.

The partially separated aqueous phase of the heated mixture from the lower part of the tank 4 is discharged along line 9. In the buffer tank 8, the mixture is heated to 90 ° C also through the heat exchanger 10, and part of the water is discharged along the line 11. The heated compound mixture is pumped to the centrifugal 3-phase decanter by pump 12 13. On the bypass line between the pump 12 and the decanter 13, a high-frequency current generator 14 is installed. After a 3-phase decanter 13, solid particles are discharged along line 15, water is discharged through line 16, and oil is discharged through line 17. Water discharges 9, 11 16 connected to the outlet to the tank tertiary treatment (not shown in FIG. 3), and oil in the commodity tank (also not shown in FIG. 3). To control the viscosity of the raw materials in front of the decanter, there is a sampler 18.

When the viscosity of the mixture at the reception of the decanter is more than 50 mPas, a high-frequency current generator is turned on. At the same time, the generator strapping allows the liquid to pass through the electrodes and arrive at the decanter with the viscosity value of the required value and bring the oil at the outlet of the decanter to commercial quality.

The technical and economic advantage of the proposed scheme is the production of oil after a commercial quality decanter.

Literature

1. Pat. 2171700 RF. The method of processing trap oils of oil sludge pits / X. Reinhold, R.Kh. Fassakhov, RZ Minnigalimov and others (RF). - Publ. 08/10/2001. BI No. 22.

2. Pat. 2400523 RF. The method of dehydration of water-oil emulsions by the action of an electromagnetic field / L.A. Kovaleva, R.Z. Minnigalimov, P.P. Zinnatullin (RF). - Publ. 09/27/2010. BI No. 27.

Claims (1)

A barn hydrocarbon processing unit, including an open barn with feedstock, a line with a pump for supplying raw materials from the barn to the mixing tank, a line with a heat exchanger for feeding crude oil to the mixing tank, a line with a pump for pumping the mixture into a buffer tank with a heat exchanger for heating the compound mixtures, a line with a pump for feeding the heated mixture to the decanter, a line for discharging solid particles from the decanter, a line for draining oil from the decanter, water drains from the above tanks and decanter, characterized in that In the bypass line, a high-frequency current generator is installed between the pump and the decanter.