WO2015057041A1

WO2015057041A1 - In-line cavitation assembly

Info

Publication number: WO2015057041A1
Application number: PCT/KZ2014/000018
Authority: WO
Inventors: Юрий СУСАНОВ; Дауит НУКЕНОВ
Original assignee: Юрий СУСАНОВ
Priority date: 2013-10-18
Filing date: 2014-10-10
Publication date: 2015-04-23

Abstract

An in-line cavitation assembly is intended for treating heavy and viscous crude oil for the purpose of breaking down high molecular weight compounds into smaller, simpler compounds, thus bringing about an up to tenfold reduction in the viscosity of the oil and an up to 70 percent increase in light oil yield. The assembly consists of a constant-level tank with a float valve for maintaining the level in the tank, to which crude oil is supplied from a temporary storage tank. The oil, pumped through a vertical siphon tube, begins to "boil" as a result of reduced pressure, releasing bubbles of gas (gasoline) in the body of the flow as a result of the saturation of the vapours, at a set vacuum and temperature. When they enter the pump, which raises the pressure, the bubbles begin to collapse, breaking down high molecular weight compounds as a result of hydraulic impacts. In order to prevent siphon failure due to an accumulation of bubbles, an air valve is installed at the top of the siphon tube, from which valve a vacuum pump pumps out gasoline vapours, which pass through the evaporator of a refrigerating machine and are condensed and collected in a tank for use as appropriate.

Description

Flow cavitation installation

It can be used in the oil industry for the purpose of influencing heavy and viscous oils, for the purpose of the destruction of high molecular weight compounds, into smaller and simpler ones, as a result of which the oil viscosity decreases from 2 to 10 times, and the number of light fractions of oil increases by 50 -70%. At the experimental laboratory facility described in the 2007 report. RSE "Kazakh National University named after K.I.Satpayev", (on pages 13-16), which can be considered an analogue. The essence of the technology is to compress oil at a temperature of 20 ° C with a piston, followed by rarefaction up to 0.1 atmospheric pressure at which gasoline vapors are saturated, bubbles are released, and their further collapse, resulting in the destruction of high-molecular compounds into smaller and simpler ones resulting in low-frequency cavitation. In addition to improving the quality of high-viscosity and high-paraffin oil, the installation makes it easy to adjust the physicochemical parameters of the oil. However, this is a laboratory installation, of cyclic action, and cannot be used for industrial implementation.

The prototype of the flow cavitation installation is a pipe with local narrowing described in the Great Soviet Encyclopedia - hydrodynamic cavitation. Its essence lies in the formation of gas bubbles when pumping liquid through a local narrowing of the pipe, where there is an increase in the speed of the liquid, and as a result, a local decrease in pressure. The disadvantage is the slight formation of caverns and the need to maintain high pumping speeds.

A “Flow cavitation installation” is proposed, consisting of a constant-1 capacity tank that supports a ball valve-2, a suction pipe-3, in the form of a siphon, which provides a vacuum when pumping oil-9, atmospheric pressure OD, which ensures the height of the siphon 8-10 meters (for oil, depending on its temperature). An air valve-4 is installed in the upper part of the siphon pipe to pump gas gas accumulations with a vacuum pump-5 in order to prevent the siphon from breaking. An air valve with a floating ball prevents oil from entering the vacuum pipe-6. The sucked-off gasoline vapors are condensed in the evaporator of the refrigeration machine-7, and collected in the tank-8, using it as intended.

Since vapor pressure depends on temperature and vacuum, it is necessary to maintain the oil temperature at the calculated level, at a given height of the siphon pipe. The unit works automatically: when oil is sucked in through a siphon pipe, as a result of rarefaction, gas bubbles form (cold cracking), which collapse after the pump, breaking high molecular weight compounds, with an improvement in the quality of oil viscosity, which reduces energy consumption during pumping, and increases yield of light fractions during cracking.

Claims

CLAIM

1. In-line navigation installation, consisting of an intermediate reservoir, a constant level with oil, a suction pipe made in the form of a siphon, providing vapor saturation, with a working pump, at a given oil temperature, provides hydrodynamic cavitation in the stream, causing the destruction of high molecular weight compounds, into smaller and simpler ones, reducing viscosity up to 10 times and increasing the yield of light fractions of oil products up to 70 percent when cracking oil.

2. The device according to claim 1, in order to maintain a constant level, in the intermediate tank, the supply pipe is equipped with a float valve, and in order to avoid the breakdown of the siphon, with the accumulation of gases from rarefaction, an air valve for gas phase selection (gasoline) is installed in the upper part of the siphon pipe ), with evacuation by a vacuum pump, through the evaporator of the refrigeration machine, into a container, for intended use.