RU2225741C2 - Method to remove particles of impurities from a liquid - Google Patents

Abstract

FIELD: oil-producing industry and other branches of industry. SUBSTANCE: the invention presents a method to remove particles of impurities from a liquid. The method is dealt with technology of removal of particles of impurities from a liquid and may be used in oil producing and other industries, where purification of a liquid from impurities is required. The method provides for a liquid supply into a settling container, separation of particles of impurities under action of the volumetric (gravitational and Archimedean) forces, withdrawal of the purified liquid and removal of impurities. The liquid supplied into the container is distributed through separators representing packages of members with channels, the total area of the through passage section of which is more than the area of the container through passage section. The process of distribution of a liquid in the container through packages of members is combined with removal of the particles of impurities using redistribution of the particles of impurities in the volume of the separators near a zone of the impurities removal from the container. The technical result: the method allows to increase quality of purification of liquids from impurities. EFFECT: increased quality of purification of liquids from impurities. 2 dwg, 1 tbl

Description

The invention relates to a technology for removing particles of impurities from a liquid and can find application in the oil and other industries where it is necessary to clean the liquid from impurities.

A known method of removing particles of impurities from a liquid, including feeding a stream to a settling tank at the beginning of a sludge cycle, static sludge, phase selection at the end of a static sludge cycle [1].

A disadvantage of the known technique for removing impurity particles from a liquid is the duration of the process.

A known method of removing particles of impurities from a liquid, including dynamic liquid sludge in a settling tank and the withdrawal of purified liquid and impurities [2] (prototype method).

The disadvantage of this technique of removing impurity particles from a liquid is its limited throughput due to irrational use of the space of the tank.

The technical result of this invention is to increase the depth of purification of liquids from impurities and the capacity of the settling tank.

To achieve a technical result in a method for removing particles of impurities from a liquid, in which the liquid is supplied to a settling tank (hereinafter simply referred to as the tank), the particles are separated under the influence of volumetric (gravitational and Archimedean) forces of the impurities, the discharge of the purified liquid and impurities, according to the invention, is supplied to the liquid is distributed through separators, which are packages of elements with channels, the total passage area of which is greater than the area of the tank passage section, while definiteness liquid in the vessel through the cell stacks are combined to remove particles of impurities by redistributing particulate impurities in the bulk package for display zone impurities from the container.

In the inventive method, the depth of liquid purification from impurity particles is increased due to the fact that the redistribution of impurity particles to the zone of impurity removal from the tank occurs in those areas in which a significant decrease in the fluid flow rate in the tank is achieved, namely in the separators. A significant decrease in the fluid flow rate in the separators is due to the fact that the total area of the passage section of the channels of the packages of elements constituting the separators is larger than the passage section of the settling tank. A decrease in the flow velocity in the channels of the packet of elements and the redistribution of impurity particles in such regions of the container contributes to their enlargement and faster removal of impurity particles under the influence of bulk forces. As a result, the depth of liquid purification and the throughput of the settling tank are increased.

Thus, the implementation of the above operations of the proposed method will allow, in comparison with the prototype method [2], to increase the depth of liquid purification and the capacity of the settling tank.

The application of the proposed method will reduce the time of dynamic sludge, the depth of liquid purification.

The inventive method of removing particles of impurities from a liquid can be specifically applied, for example, in the oil fields in the preparation of oil.

The inventive method of removing particles of impurities from a liquid is as follows.

Liquid is supplied to the settling tank (hereinafter simply referred to as the tank) for removal from it by separation of impurity particles under the influence of the volumetric (gravitational and Archimedean) forces, while the liquid supplied to the tank is distributed through separators, which are packets of elements with channels, the total passage area which are larger than the passage area of the tank, and the process of distributing the liquid in the tank through packets of elements is combined with the removal of impurity particles by redistributing the particles of impurities in the bulk of the pack to the zone of the removal of impurities from the tank, the purified liquid and impurities are removed from the tank through separate nozzles.

The invention is illustrated by drawings.

Figure 1 presents one of the variants of the device for implementing the inventive method of removing particles of impurities from a liquid lighter than liquid.

A device for removing particles of impurities from a liquid includes a settling tank 1, nozzles for introducing a liquid 2, an outlet for impurities 3 and a purified liquid 4, separators 5 from elements 6, which are a wave-like plate (Fig. 2). The upper part of the separators 5 is connected by perforated pipes 7 to the distributor 8 with pipes 9 embedded in the separators 5.

A device for removing particles of impurities from a liquid (Fig. 1) is intended for continuous removal of particles of impurities from a liquid entering pipe 1 through a nozzle 2. Pipes 3 and 4 are used to drain impurities and purified liquid from the tank 1, respectively. To clean the liquid, it flows through the nozzle 2 and is distributed through the separators 5 through the distributor 8 and through the nozzles 9. The separators 5, which are a package of plates 6, serve to distribute the liquid entering the tank 1 in the volume of this tank and redistribute the impurity particles into the impurity removal zone 10 and withdrawal of the purified liquid into zone 11.

A device for removing particles of impurities from a liquid (Fig. 1) works as follows.

Liquid is supplied to the settling tank 1 through the nozzle 2, which through the distributor 8 and the nozzles 9 enters the separators 5. On the plates 6 of the separators 5, under the influence of volume forces (gravitational and Archimedean forces), particles of light impurities move to the holes 12 and perforated pipes 9. From the perforated pipes 9, impurities under the influence of volume forces enter the region 10 and then through the pipe 3 are removed from the tank 1. At the same time, the purified liquid from the separators 5 enters the zone of the purified liquid 11. The purified liquid and impurities and are removed from the tank through pipes 4 and 3, respectively.

For testing, a device was used to remove impurity particles of lower density from a liquid (Fig. 1) with the parameters given below.

The diameter of the container is 1 - 1600 mm, the height is 2200 mm. The number of separators 5-19 pieces. The diameter of the plates is 6 - 280 mm, the thickness is 0.3 mm. The number of plates in one separator is 100 pieces. The number of holes 12 with a diameter of 30 mm in plates of 6-8 pieces made in diameter of 240 mm. Separator height 1300 mm. The through section of the separators 5 (FIGS. 1 and 2) amounted to more than 3 364 824 mm ² (this is the area of perforation of the nozzles 9, the perforation of the nozzles 9 is made at the location of the plates 6), the through section of the tank 1 - 2 009 600 mm.

Comparative tests of the proposed method were carried out using the method [2] and device [3] - the data are summarized in table. 1. The device is a prototype was the same tank 1 without separators 5 (figure 1).

The data in Table 1 confirm that when combining the processes of distributing the liquid in the container through packets of elements and removing particles of impurities by redistributing the particles of impurities in the volume of packets to the zone of removal from the container of impurities, a deeper purification of the liquid is achieved than using known techniques and technology. The inventive method and device allows for this to carry out the cleaning process with a larger dynamic loading of the sump (compare columns 4 and 6 of table 1).

Thus, the removal of particles of impurities from a liquid is more effective using the proposed method than the prototype [2].

The inventive method is industrially applicable - for its implementation, you can use the exploited settling tanks.

Sources of information

1. The method of removing particles of impurities from a liquid. Kasatkin A.G. Basic processes and apparatuses of chemical technology. - M .: Chemistry, 1973, p. 179, Fig. V-1.

2. A method for removing impurity particles from a liquid. Tronov V.P. Oil field preparation. - M .: Nedra, 1977, p. 86, fig. 36a.

3. A device for removing impurity particles from a liquid. Tronov V.P. Oil field preparation. - M .: Nedra, 1977, p. 86, fig. 36a.

Claims (1)

A method for removing impurity particles from a liquid, in which a liquid is supplied to a settling tank, separation of impurity particles under the influence of volumetric (gravitational and Archimedean) forces, removal of purified liquid and impurities, characterized in that the liquid supplied to the tank is distributed through separators, which are packets elements with channels, the total area of the passage section of which is greater than the area of the passage section of the container, while the process of distributing the liquid in the container through the packets of elements is combined with Dalen particulate impurities by particle redistribution of impurities in a screen separator output zone impurities from the container.

Images