The way the joint collection, oil treatment and recycling, disposal of oily sludge

 

(57) Abstract:

The invention relates to the field of the oil industry and concerns the methods of collection, separation, oil treatment and recycling, disposal of oily sludge. The method includes the flow of production from wells on the separators of the first and second stages, the discharge of water from the reservoir preliminary water discharge, dehydration and desalting, the output of the intermediate layer from the reservoir preliminary water followed by heating it in a heat exchanger and implementation dividing it into oil, water and sludge at the site of separation of the phases. Before heating the intermediate layer in the heat exchanger shall mix it with oily sludge. Heating the mixture in the heat exchanger is carried out at a temperature of 90-135oC. as a node separation of the phases used fluidization installation, in which the heated mixture is injected tangentially under pressure 1.6 to 2 atmospheres. The technical result consists in increasing the quality of the oil and sludge, as well as in the reduction of energy consumption. 1 Il., table 1.

The invention relates to method of collection, separation and treatment of oil, and the processing and disposal of oily sludge and can be Ipoly in the system of collection and preparation of oil (SU, copyright certificate 1022983, CL 01 D 17/04, 1983). The method of collection and preparation of oil includes the flow of production from wells on the separators of the first and second steps, then into the tank preliminary water, away from where the formed intermediate layer by heating with subsequent supply to the node in the centrifugal separation of the phases connected to the slurry line with sludge trap and having a line output of oil and water.

The main disadvantages of this method of collection and preparation of oil are large energy costs associated with large volumes of oil, gas and water passing through the centrifuge, and not high enough output parameters on the quality of water and oil.

The known method of collection and preparation of oil (RU 2153382, 01 D 17/04, 2000). The method involves measurement of the volume of production wells, gas separation, introduction of demulsifier in the pipeline pumping production wells in the separator, separating the free formation water from the sump and the oil through the deep dehydration and desalting by adding hot water to it and dispersing it with subsequent separation and separation of phases. The demulsifier is injected in two stages, half of the standard, while the other half enter podgotovku oil carry not less than two tanks, providing a continuous flow of production from wells. Phase separation in a settling tank before and after the dispersion is carried out in the mode of thermal effects.

The known method of collection and preparation of oil provides increased performance and reduces capital costs by reducing the number of stages of dehydration and desalting gazoochistnoe emulsion.

The disadvantage of this method of collection and preparation of oil is that it is used in the oil fields with a small amount of oil and the low quality of the finished commodity oil.

The closest in technical essence and the achieved result of the present invention is a method of collection and preparation of oil that is implemented in the system of collection and preparation of oil (RU 2094082, 01 D 17/04, 1997). According to the invention, the system of collection and preparation of oil includes separators of the first and second stages and stage hot separation tank preliminary water discharge from the site forced fence of the intermediate layer, prepodavatel the intermediate layer and the node separation of the phases, executed in the form of a two-phase Cantatore and three-phase disc centrifuges, line feed sludge in the sludge trap and the first and second stages, discharge of water from the reservoir preliminary water discharge, dehydration and desalting, the output of the intermediate layer, the subsequent heating and split it in the node separation of the phases for oil, water and sludge, thus to improve the quality of commercial oil gradually injected reagent demulsifier: prior to being fed into the separator first stage, and then before heating oil emulsion in the oven. Thus formed intermediate layer from the reservoir preliminary water is directed into the heat exchanger for heating, and then it is sent on a two-stage separation in Cantatore and three-phase disc centrifuges for oil, water and sludge. which individual flows are directed to the hot stage separation system of reservoir pressure maintenance and sludge, respectively.

The main disadvantages of this method of collection and preparation of oil are large energy costs associated with two-stage water-gas separation of the emulsion in the host phase separation is not high enough output parameters on the quality of oil and water, as well as the presence in the waste sludge of oil and no possibility of recycling (disposal) of oily sludge.

Technical the and the obtained oil, water and sludge, as well as ensuring disposal of oily sludge.

The technical result is achieved in that in the method of the joint collection, oil treatment and recycling, disposal of oily sludge, including the flow of production from wells on the separators of the first and second stages, the discharge of water from the reservoir preliminary water discharge, dehydration and desalting, the output of the intermediate layer from the reservoir preliminary water followed by heating it in a heat exchanger and implementation dividing it into oil, water and sludge at the site of separation of the phases, before the heating of the intermediate layer in the heat exchanger shall mix it in the mixer with oily sludge, which is fed to the mixer intake device of neftechimautomatika, while heating the mixture in the heat exchanger is carried out at a temperature 90-135oAnd as a host phase separation using fluidization installation, in which the heated mixture is fed tangentially under pressure 1.6 to 2 atmospheres.

The invention is illustrated in the drawing, which shows a diagram of the collection, oil treatment and recycling, disposal of oily sludge.

Way to share with is quaini 11 through piping 2 direct production wells, representing getvolumepathnamew mixture, on site measurement of production wells 3 for measuring the flow rate of each of the wells, where it served in the pipeline separator 1st stage 4 entered into the reagent-demulsifier (B)to improve the collection and preparation of oil. After the 1st stage of separation production wells arrives at the 2nd degree of separation 5. The selected gas (G) is sent to the host gas, and discharged from the separator water flow I in turn sent to the system reservoir pressure maintenance. Then oil-water emulsion from the separator 5 is supplied to the tank preliminary water discharge 6. Here there is a partial destruction of the emulsion into oil and water and the accumulation of highly concentrated emulsions in the intermediate layer. In order to avoid disrupting the preliminary dehydration in the tank 6 dehydrated oil to prepare take two threads.

The upper stream is dehydrated oil located above the intermediate layer, after entering it the reagent of demulsifier (R) forced by means of pump 9 is directed into the furnace heating 10, then at step deep dehydration 11, step deep demineralization 12 and the hot separation in the separator 13 for aceveda on long-distance transport. Between levels deep dehydration 11 and desalting 12 is injected fresh water wash (In) up to 10 vol.%.

The intermediate layer 7 (second stream of oil and water emulsion) using a suction device, driven in rotation with a drive 8, is sucked by the pump 16 and with it fed into the mixer 17, which simultaneously using necoho suction device 18 from Septenber 19 serves of oily sludge in a given number. Then the mixture (with a business need each component separately) is pumped through the heat exchanger 20 for heating the mixture to a temperature of 90-135oC. the Specified temperature range is set empirically and provides the greatest effect phase separation. The heated mixture is injected tangentially at a pressure equal to 1,6-2,0 bar (optimally valid), the node separation of the phases, executed in the form of fluidization installation 21 containing three chambers of cylindrical shape and a conical shape for separating a mixture of oil, water and sludge. The angle of introduction of the mixture into the installation 21 together with live steam which creates the effect of hitting the wall of the cylindrical chamber, and generates a rotation of the mixture in it at high speed on the principle of tube Ve which allows you to select from the oil components, non-hydrocarbons.

When oil gets into the conical part of the chamber installation 21, remove any remaining water. This effect is achieved by the combination of several factors, such as density, vacuum and coalescence of oil droplets in the cone of the cyclone. As a result of work fluidization installation 21 in its upper chamber is the dehydration of the mixture. For example, in its upper part are 99% of hydrocarbons, 1.0% water and sediment, and in its lower part is 90% of hydrocarbons, and 2.0% of a solid residue, and 8.0% of water.

Remove the water can be re-directed to re-clean or completely withdraw from the installation 21 in the system of reservoir pressure maintenance I.

The solid precipitate falls out of camera primary separation in the lower vacuum chamber fluidization installation 21. Refractory hydrocarbons present in the original raw material that has not been liquefied and climbed to the upper chamber, spun together with a solid precipitate. It's basically bitumovarochnye and asphaltic hydrocarbons with a high flash point. At the bottom of the camera they are subjected to live steam Stripping, followed by drying under vacuum.

The aqueous phase is removed from the conical chambers, is practically free from oil, unload the pallet in the form of hot wet mass, which quickly dries at ambient temperature, turning into a granular product that bitteroot for subsequent removal in the dumps 22 or use it as a building ballast.

The oil from the unit 21 is directed to a hot separation, which is carried out in the separator 13, and then in the product tank, and thence through pump 15 for further transportation of the finished oil.

The main process parameters and quality of oil to be achieved in the implementation of the present invention, shown in the table. The table lists the examples that are given different data on the composition of the raw material supplied to the plant 21, the quantitative ratio of the intermediate layer from the reservoir and Septenber 23, as well as the influence of temperature and pressure on the quality of the product - oil.

The way the joint collection, preparation and processing and disposal of oily sludge will reduce energy consumption, to improve the quality of the original product - oil, as well as receiving sludge without oily components and recycle at the same time oily sludge with a view to its util the equipment and heaters from salt deposition and coke, not only will improve the overall environmental situation on the subject of oil, but also improve its reliability and safety.

The way the joint collection, oil treatment and recycling, disposal of oily sludge, including the flow of production from wells on the separators of the first and second stages, the discharge of water from the reservoir preliminary water discharge, dehydration and desalting, the output of the intermediate layer from the reservoir preliminary water followed by heating it in a heat exchanger and implementation dividing it into oil, water and sludge at the site of separation of the phases, wherein before the heating of the intermediate layer in the heat exchanger shall mix it in the mixer with oily sludge, which is fed to the mixer intake device of neftechimautomatika, while heating the mixture in the heat exchanger is carried out at a temperature of 90-135oAnd as a host phase separation using the installation created in it by the effect of the hydrocyclone, coalescence and vacuum Stripping of hydrocarbon and solid parts of the mixture, in which the heated mixture is injected tangentially under pressure 1,6-2,0 atmosphere.

 

Same patents:

The invention relates to the dehydration of petroleum products, representing an emulsion type water in oil"

The invention relates to means for separating oil from its mixture with water

The invention relates to the field of nefteothodov, in particular to the technology of destruction and dehydration of oil-water emulsions

The invention relates to the technology of desalting and dehydration of oil and applied to the equipment and can be used in refineries and oil industries

The invention relates to methods of collection and preparation of oil at the oil fields with a small amount of oil

The invention relates to the oil industry and can find application, in particular in technological methods for the destruction of reservoir fluids into components - oil, gas, water (oil)

The invention relates to techniques for the separation of immiscible liquids, in particular to devices for separating and deep dehydration emulsified hydrocarbon media with a different type of emulsions in a wide range of water content, and can be used for deep dehydration of crude oil and petroleum products in the oil and gas and petrochemical industries

FIELD: oil industry.

SUBSTANCE: method includes mixing water-oil emulsion with drain water in line of inlet of first electric hydrator by dispersing drain water in volume 8-15% from volume of prepared oil at temperature 40-50°C. As washing water drain water is used from same oil deposit with mineralization less than saturation limit.

EFFECT: higher efficiency.

1 ex

FIELD: oil industry.

SUBSTANCE: method includes feeding oil emulsion to reservoir with flow 0,5-1 m3/hour through layer of drain water of same oil deposit with mineralization less than saturation limit at temperature 20-30°C and bed thickness of drain water 6-8 m. in reservoir oil is separated and directed to inlet of oil preparation plant.

EFFECT: higher efficiency, broader functional capabilities.

1 ex

FIELD: water treatment.

SUBSTANCE: invention relates to treatment of industrial and household waters, especially to separation of oil/water mixtures to remove coarsely dispersed and emulsified petroleum products therefrom. It is proposed to use styrene/divinylbenzene copolymer grains with fraction composition uniformity factor not higher than 1.6 as coalescent material to separated oil/water mixtures. In this case, price of material is lowered, oil/water separation efficiency is enhanced, and necessity of periodically washing material is omitted, whereas lifetime of material is prolonged, and efficiency temperature range is extended.

EFFECT: improved performance characteristics and reduced expenses.

2 dwg

FIELD: oil industry.

SUBSTANCE: method includes dispersing water in oil emulsion at input of accumulator. As water, drain-water of the same oil deposit is used with content of oil products no less than 60 mg/l and hard suspended particles no more than 50 mg/l in volume 8-15% of volume of prepared oil at a temperature 5-25°.

EFFECT: higher efficiency.

1 ex

FIELD: oil industry, particularly to prevent salt deposits in collector and measuring installations during oil production and transportation.

SUBSTANCE: method involves mixing product flows and transporting thereof, wherein compatible liquids are chosen for further mixing so that during mixing of above liquids oversaturated salt solution does not appear to prevent salt precipitation. Liquid for mixing is taken in amount enough to reduce salt concentration to value, which does not exceed saturated concentration and provides mineralization obtaining after liquid mixing. Mixing of liquid flows is performed out of process equipment and in tubes provided with release coating applied on inner tube surfaces.

EFFECT: increased simplicity due to elimination of chemical reagent usage and due to reduced number of stages.

4 ex

FIELD: dry chemical cleaning of clothing, in particular, separator and method for extracting of water from solvent in the process of dry chemical cleaning.

SUBSTANCE: separator has main chamber equipped with inlet for receiving mixture of siloxane solvent and water from dry cleaning system and including upper layer and lower layer separated from one another by gravity force and containing siloxane solvent and water, respectively, with water concentration in lower layer being greater than in upper layer, device for adjusting flow of said mixture delivered through said inlet into main chamber and feeding said mixture from main chamber into filter containing material facilitating in coalescence for receiving of mixture forced through by means of device for adjusting flow of said mixture, and additional chamber for further separation of siloxane solvent and water. Additional chamber is connected with filter and is equipped with first inlet adapted for removal from additional chamber of at least upper layer containing siloxane solvent, and second outlet adapted for discharge of water from lower layer of additional chamber onto bottom of main chamber and communicating with third outlet for discharge of water from main chamber. Method for separating of water from mixture of siloxane solvent and water produced after dry chemical cleaning of articles is performed by means of said separator.

EFFECT: increased efficiency in separating of water from siloxane solvent and water mixture through gravitational separation of two mixture components having insignificantly differing densities.

25 cl, 4 dwg

FIELD: oil industry, possible use for preparing oil emulsion at oil preparation plants.

SUBSTANCE: method includes feeding oil emulsion received from oil fields into devices for preliminary water disposal, separating water part from oil emulsion in preliminary water disposal devices and draining of water part to cleaning structures, cold separation of gas from oil emulsion in buffer vessels, heating of oil emulsion in heat exchangers and in furnace, hot dehydration of oil emulsion at hot sediment stages, desalination of oil emulsion in electric dehydrators with feeding of fresh water into electric dehydrators through disperser, feeding of drainage water after hot sediment and electric dehydrators to beginning of process at devices for preliminary water disposal, feeding of processed oil from electric dehydrators through heat exchangers into buffer vessels for processed oil, hot separation of gas in buffer vessels for processed oil and feeding of oil to consumer. In accordance to invention devices for preliminary oil disposal are divided on two steps. First step is operated in normal mode with feeding of oil emulsion from oil fields into inlet and from preliminary water disposal devices into buffer vessels. Second step is bound in parallel to first step, feeding of oil emulsion from oil fields into inlet of second step of preliminary water disposal devices is prevented. Drainage water after hot sediment and electric dehydrators is fed to inlet of second step of preliminary water disposal devices, without mixing thereof with water-oil emulsion received from fields. From second step of preliminary water disposal devices part of water is fed into cleaning structures and oil emulsion is fed into inlet of buffer vessels. Influx of drainage water into inlet of second step of preliminary water disposal devices is performed through lower manifold-distributor of device below layer of water cushion, while technological process in second step of preliminary water disposal devices is performed at temperature of 50-80°C.

EFFECT: increased efficiency of separation of water-oil emulsion at preliminary dehydration stage onto oil and water, stabilization of hot dehydration stages operation, desalination of oil and prevention of growth of number of intermediate layers from stable emulsions.

1 ex

FIELD: chemical industry.

SUBSTANCE: device comprises straight hollow cylinder (1) that has wall (2) at one of its faces or is in a contact with the wall. Cylinder (1) has outlet port (3) made in its side and outlet port (4) made in the other face for the phase to be separated, and third port (5) for the second phase. The size of outlet port (4) is less than that of outlet port (3), and size of port (5) is intermediate between them.

EFFECT: enhanced reliability.

18 cl, 6 dwg, 1 tbl

FIELD: oil producing industry; installations for the fields oil treatment.

SUBSTANCE: the invention is pertaining to oil producing industry, in particular, to the installations for the fields oil treatment. The installation for the oil treatment includes: the oil pipeline, the first stage of the oil treatment with the end divider of the stages (EDS) and the tank of the water preliminary discharge connected with the treatment facilities by the water discharge pipeline; the second stage of the oil treatment with the pipeline of the withdrawal of the low-mineralized semi-commercial water, which is connected to the oil pipeline; the heat exchanger installed on the oil pipeline after the first stage. EDS is supplied with the water discharge pipeline, which is connected to the pipeline of the water discharge from the tank of the preliminary water discharge before the treatment facilities, and the pipeline of the withdrawal of the low-mineralized semi-commercial water is connected to the oil pipeline before the tank of the preliminary water discharge. The treatment facilities are additionally supplied with the oil withdrawal pipeline, which is also connected with the oil pipeline located before the tank of the preliminary discharge of the water. On the water discharge pipeline located before the treatment facilities and on the oil pipeline located between EDS and the preliminary water discharge tank correspondingly there are the first and second heat exchangers, which are accordingly and sequentially connected to the heat exchanger of the second stage. The technical result of the invention is cooling of the finished commercial oil to the temperature of 30°С before its transfer to the oil stock accounting site; the increased efficiency of operation of the preliminary water discharge tank up to the water share in the oil of no more than 0.5 %; the increased degree of treatment of the oil-field water, the reduced power input.

EFFECT: the invention ensures cooling of the finished commercial oil to the temperature of 30°С before its transfer to the oil stock accounting site; the increased efficiency of operation of the preliminary water discharge tank up to the water share in the oil of no more than half percent; the increased degree of treatment of the oil-field water; the reduced power input.

1 dwg

FIELD: oil-producing industry; oil-refining industry; oil treatment.

SUBSTANCE: the invention is pertaining to oil treatment, in particular, to destruction of the oil-water emulsions and may be used in oil-producing industry and oil-refining industry. The device includes the pipe duct, the central partition and the additional partitions in parallel and symmetrically mounted concerning the central partition. The technical result of the invention is reduction of the time necessary for the preliminary dehydration of the oil, the decreased metal input used for the oil treatment naphtha, decrease metal input used for the oil treatment, the decreased volume of the additional batching dosage of the demulsifying agent.

EFFECT: the invention ensures reduction of the time necessary for the preliminary dehydration of the oil, the decreased metal input used for the oil treatment, the decreased volume of the additional batching of the demulsifying agent.

2 cl, 5 dwg, 1 tbl

Up!