CN108355501A - A kind of demulsifier pipeline filling and mixing device - Google Patents

Abstract

The invention discloses a demulsifier pipeline filling and mixing device, which consists of a medicament distributor and a mixing chamber, and comprises a cylindrical pipe body connected in a fluid pipeline through a flange, wherein an annular dosing center distribution chamber is arranged at a channel inlet of the mixer, a plurality of evenly distributed dosing branch pipes which are communicated with the dosing center distribution chamber and are provided with medicament outlet holes are arranged around the inner wall of the dosing center distribution chamber and extend towards the center of the pipe body, and the dosing branch pipes are perpendicular to the incoming liquid direction of the pipe body and point to the center of the pipe body; the medicine feeding central distribution chamber is connected with a medicine feeding main pipe communicated with a medicine source; the medicine feeding branch pipes are uniformly distributed with medicine feeding holes, and the pipe openings are covered with sealing caps. The mixing chamber is made by the steel pipe of cask shape area slot, and this device can realize demulsifier and crude oil emulsion intensive mixing, simultaneously through reducing the crude oil emulsion emulsification scheduling problem that causes because factors such as pressure reduction when getting into the centralized processing ware seriously, through field test prove, can effectively reduce more than 20% demulsifier quantity after using this medicine mixing arrangement that adds.

Description

A kind of demulsifier pipeline filling and mixing device

technical field

The invention belongs to the field of oilfield crude oil demulsification and dehydration, and relates to a demulsifier pipeline filling and mixing device.

Background technique

Demulsification and dehydration of crude oil by adding demulsifiers has become the most common crude oil dehydration technology in the petroleum industry because of its high economic efficiency. The demulsifier achieves the purpose of dehydration by evenly distributing into the crude oil emulsion to break the interface film of the emulsified droplets to realize the coalescence and sedimentation of water droplets. The conventional demulsifier filling process results in a large amount of demulsifier being directly integrated into the water phase at the bottom of the pipeline due to the influence of gravity and hydrophilicity, and cannot be effectively dispersed into the oil-water emulsion in the middle and upper parts, resulting in the on-site demulsifier being effective. Low utilization. Realizing the uniform dispersion of the demulsifier in the crude oil emulsion is the key to improving the utilization rate of the demulsifier in the mine.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a demulsifier pipeline filling and mixing device, which can ensure that the demulsifier and the crude oil emulsion are fully mixed, and at the same time reduce the pressure drop change due to the fluid entering the dehydration device Influenced by non-uniform shearing, resulting in the secondary mixing and emulsification of the emulsion and the extracted water.

In order to achieve the above object, the present invention adopts the following technical solutions to achieve:

A demulsifier pipeline filling and mixing device, including a mixing cylinder installed at the front end of the crude oil dehydration system, the front end of the mixing chamber is the crude oil inflow inlet, and the rear end is the crude oil outflow outlet; the middle part of the mixing cylinder is provided with a mixing chamber, which is connected with the crude oil A demulsifier filling port is opened on the cylinder wall between the inflow ports, and a dosing chamber is inside the cylinder wall, and the dosing chamber communicates with the demulsifier filling port.

The further improvement of the present invention is:

The dosing chamber is a number of spray pipes radially distributed around the cylinder wall to the center.

The diameter of the spray pipe is 8mm, the length is 24mm, and a number of circular holes with a diameter of 0.8mm are evenly distributed on the surface.

The nozzle of the spray pipe is provided with a sealing cap.

The number of spray pipes is 8.

The mixing chamber is a hollow cylinder perpendicular to the mixing cylinder.

Several gaps are opened on the hollow cylinder.

The cylinder has a length of 154 mm, a diameter of 137 mm and a wall thickness of 7.1 mm.

The slot has a width of 3 mm and a length of 110 mm.

The gaps are slits, and there are six groups in total; among them, the fourth group is composed of 5 slits; the second group is composed of 16 slits.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention connects the cylindrical pipe body in the fluid pipeline through the flange, and an annular dosing center distribution chamber is arranged at the channel entrance of the mixer, and the inner wall of the dosing center distribution chamber extends to the center of the pipe body and is uniformly distributed around the dosing center distribution chamber. There are multiple dosing branch pipes with drug outlet holes connected to the distribution room of the dosing center. The dosing branch pipes are perpendicular to the direction of the incoming liquid of the pipe body and point to the center of the pipe body; the distribution room of the dosing center is connected to the drug supply connected to the drug source The main pipe; the dosing branch pipe evenly distributes the dosing holes, and the nozzle is covered with a sealing cap. The mixing chamber is made of a barrel-shaped steel pipe with slots. This device can realize the full mixing of the demulsifier and the crude oil emulsion. At the same time, it can reduce the serious emulsification of the crude oil emulsion caused by factors such as pressure drop when entering the centralized processor. The field test proves that the dosage of the demulsifier can be effectively reduced by more than 20% after the application of the dosing and mixing device.

Description of drawings

Fig. 1 is a structural schematic diagram of a demulsifier pipeline filling and mixing device;

Figure 2 is a left view of the demulsifier filling system.

Among them, 1-demulsifier filling port; 2-demulsifier filling system; 3-mixing chamber; 4-mixing cylinder.

Detailed ways

The present invention is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 1 and Fig. 2, the demulsifier pipeline filling and mixing device of the present invention includes a mixing cylinder 4 installed on the crude oil pipeline, the front end of the mixing chamber 3 is the crude oil inflow inlet, and the rear end is the crude oil outflow outlet; the middle part of the mixing cylinder 4 A mixing chamber 3 is provided; the mixing chamber 3 is a hollow cylinder perpendicular to the mixing cylinder 4 . Several gaps are opened on the hollow cylinder. The dosing chamber is a dosing spray pipe radially distributed around the outer wall of the pipe to the center of the pipe; the dosing spray pipe extends perpendicular to the axial direction to the center of the pipe body and is evenly distributed; the shape of the mixing chamber is a cylindrical pipe vertically connected to the pipe body; the mixing chamber is composed of a slotted steel pipe body, and the steel pipe body is designed with slots of a certain width. There are 8 dosing spray pipes distributed radially around the outer wall of the pipe to the center of the pipe. Each spray pipe is 24mm long and 8mm in diameter. There are 10 round holes with a diameter of 0.8mm evenly distributed on it. At the same time, the nozzle cover is sealed. cap. The dosing spray pipe extends vertically to the center of the pipe body and distributes evenly. The cylinder has a length of 154 mm, a diameter of 137 mm and a wall thickness of 10 mm. The mixing chamber is designed with a pressure-stabilizing mixing device that can be manually adjusted according to the fluid pressure in the pipeline. The mixing device is made of a cylindrical steel pipe with an outer diameter of 127mm and a wall thickness of 7.1mm. The pipe body is distributed with gaps of specific width and length. The slits distributed by the mixing device have a width of 3 mm and a length of 110 mm. There are 6 groups of slots in the mixing device, of which 4 groups of slots are composed of 5 slots with a width of 3 mm and a length of 110 mm, and two groups of slots are composed of 16 slots with a width of 3 mm and a length of 110 mm.

Principle of the present invention:

In the present invention, 8 dosing spray pipes are radially distributed around the outer wall of the pipe to the center of the pipe. Each spray pipe is 24mm long and 8mm in diameter, and 10 round holes with a diameter of 0.8mm are evenly distributed on it. With sealing cap. The mixing chamber is a cylinder with a length of 154 mm, a diameter of 137 mm and a wall thickness of 10 mm. The mixing chamber is designed with a pressure-stabilizing mixing device that can be manually adjusted according to the fluid pressure in the pipeline. The mixing device is made of a cylindrical steel pipe with an outer diameter of 127mm and a wall thickness of 7.1mm. The pipe body is distributed with gaps of specific width and length. There are 6 groups of slots in the mixing device, of which 4 groups of slots are composed of 5 slots with a width of 3 mm and a length of 110 mm, and two groups of slots are composed of 16 slots with a width of 3 mm and a length of 110 mm.

Working process of the present invention:

When working, the invention is installed on the front end of the crude oil dehydration system through the flange. The demulsifier filling system is designed with 8 dosing spray pipes radially distributed around the outer wall of the pipeline to the center of the pipeline, so that the generated jet can make the demulsifier as much as possible. Evenly dispersed into the crude oil emulsion in the pipeline, the fluid filled with demulsifier then enters the mixing chamber, and the inlet of the mixing chamber is designed to achieve high shear flow conditions, so as to achieve the purpose of low or moderate pressure drop. At the outlet of the mixing chamber, the outlet channel is designed so that the multiphase flow mixture is evenly distributed in the pipeline, thereby avoiding the generation of new oil-water emulsion droplets.

The above content is only to illustrate the technical ideas of the present invention, and cannot limit the protection scope of the present invention. Any changes made on the basis of the technical solutions according to the technical ideas proposed in the present invention shall fall within the scope of the claims of the present invention. within the scope of protection.

Claims (10)

1. a kind of demulsifier pipeline fills mixing arrangement, which is characterized in that the mixing including being installed on crude oil dehydrating system front end The front end of cylinder (4), mixing chamber (3) is crude oil inflow entrance, and rear end is crude oil outflux；Mixing drum is provided with mixing in the middle part of (4) Room (3) offers demulsifier filler (1) on barrel between mixing chamber (3) and crude oil inflow entrance, be dosing room (2) in barrel, Dosing room (2) is connected with demulsifier filler (1).

2. demulsifier pipeline according to claim 1 fills mixing arrangement, which is characterized in that dosing room (2) are around cylinder Wall is to the radially distributed several spray tubes (6) in center.

3. demulsifier pipeline according to claim 2 fills mixing arrangement, which is characterized in that spray tube (6) it is a diameter of 8mm, length 24mm, and surface is evenly distributed with the circular hole of several a diameter of 0.8mm.

4. demulsifier pipeline according to claim 2 or 3 fills mixing arrangement, which is characterized in that the nozzle of spray tube (6) It is provided with seal cap.

5. demulsifier pipeline according to claim 2 or 3 fills mixing arrangement, which is characterized in that the quantity of spray tube (6) It is 8.

6. demulsifier pipeline according to claim 1 fills mixing arrangement, which is characterized in that mixing chamber (3) be perpendicular to The hollow cylinder of mixing drum (4).

7. demulsifier pipeline according to claim 1 fills mixing arrangement, which is characterized in that offered on hollow cylinder Several gaps.

8. demulsifier pipeline described according to claim 6 or 7 fills mixing arrangement, which is characterized in that the length of cylinder is 154mm, a diameter of 137mm, wall thickness 7.1mm.

9. demulsifier pipeline according to claim 7 fills mixing arrangement, which is characterized in that the width in gap is 3mm, long Degree is 110mm.

10. the demulsifier pipeline according to claim 7 or 9 fills mixing arrangement, which is characterized in that gap is slot, altogether Offer six groups；Wherein, it is made of 5 slots for four groups；Two groups are made of 16 slots.