阅读说明：本技术 气液两相流分配器与气液两相流分配方法 (Gas-liquid two-phase flow distributor and gas-liquid two-phase flow distribution method ) 是由 王以斌 郭维军 丁梅峰 曾波 于 2019-03-29 设计创作，主要内容包括：本发明公开了一种气液两相流分配器与气液两相流分配方法。分配器设有混合管(1)、分配腔筒体(6)、转动轴(10)。混合管内沿轴向设有螺旋板(3),混合管的入口附近设有节流孔板(2)、出口附近设有分布板(5),分配腔筒体的入口附近设有支架(7)。分配腔筒体的内表面上设有固定隔板(8),转动轴的外表面上设有转动隔板(9)。端板(13)上设有第一分配腔出口管(11)和第二分配腔出口管(12),第一分配腔出口管与第一分配腔相通,第二分配腔出口管与第二分配腔相通。本发明还公开了一种气液两相流分配方法,使用上述的气液两相流分配器。本发明可用于石油、化工、核工业等领域,实现气液两相流的按比例精确分配。(The invention discloses a gas-liquid two-phase flow distributor and a gas-liquid two-phase flow distribution method. The distributor is provided with a mixing tube (1), a distribution cavity cylinder (6) and a rotating shaft (10). The spiral plate (3) is arranged in the mixing pipe along the axial direction, the throttle orifice plate (2) is arranged near the inlet of the mixing pipe, the distribution plate (5) is arranged near the outlet, and the bracket (7) is arranged near the inlet of the distribution cavity cylinder. The inner surface of the cylinder body of the distribution cavity is provided with a fixed clapboard (8), and the outer surface of the rotating shaft is provided with a rotating clapboard (9). The end plate (13) is provided with a first distribution chamber outlet pipe (11) and a second distribution chamber outlet pipe (12), the first distribution chamber outlet pipe is communicated with the first distribution chamber, and the second distribution chamber outlet pipe is communicated with the second distribution chamber. The invention also discloses a gas-liquid two-phase flow distribution method, which uses the gas-liquid two-phase flow distributor. The invention can be used in the fields of petroleum, chemical industry, nuclear industry and the like, and realizes the proportional accurate distribution of gas-liquid two-phase flow.)

1. A gas-liquid two-phase flow distributor characterized by: the mixing device is provided with a mixing tube (1) and a distribution cavity barrel (6), an outlet of the mixing tube (1) is connected with an inlet of the distribution cavity barrel (6), an end plate (13) is arranged at the other end of the distribution cavity barrel (6), a spiral plate (3) is arranged in the mixing tube (1) along the axial direction, the inner side of the spiral plate (3) is connected with the outer surface of a rod piece (4), the outer side is connected with the inner surface of the mixing tube (1), two adjacent circles of spiral plates (3) and a spiral flow channel are formed between the outer surface of the rod piece (4) and the inner surface of the mixing tube (1), a throttle orifice plate (2) is arranged near the inlet of the mixing tube (1), a distribution plate (5) is arranged near the outlet of the mixing tube (1), a support (7) is arranged near the inlet of the distribution cavity barrel (6), a rotating shaft (10) is arranged along the axial lead of the distribution cavity barrel (6), one, the other end of the distribution cavity extends out of an opening on an end plate (13), a fixed partition plate (8) is arranged on the inner surface of a distribution cavity cylinder body (6) between a support (7) and the end plate (13), a rotating partition plate (9) is arranged on the outer surface of a rotating shaft (10), a space with a circular cross section is formed between the distribution cavity cylinder body (6), the rotating shaft (10) and the support (7), the space is divided into a first distribution cavity (151) and a second distribution cavity (152) by the fixed partition plate (8) and the rotating partition plate (9), a first distribution cavity outlet pipe (11) and a second distribution cavity outlet pipe (12) are arranged on the end plate (13), the first distribution cavity outlet pipe (11) is communicated with the first distribution cavity (151), and the second distribution cavity outlet pipe (12) is communicated with the second distribution cavity (152).

2. The gas-liquid two-phase flow distributor according to claim 1, wherein: the mixing pipe (1) is a reducing pipe and is in a truncated conical surface shape, the diameter of an inlet is larger than that of an outlet, and the included angle between a bus of the mixing pipe (1) and the axial lead is 3-10 degrees.

3. The gas-liquid two-phase flow distributor according to claim 2, wherein: the spiral plate (3) in the mixing pipe (1) is in a shape of a right circular cone spiral surface, and the number of turns of the spiral plate (3) is 2-5 turns on the length of the diameter of an inlet of one mixing pipe (1) along the axial direction of the mixing pipe (1).

4. The gas-liquid two-phase flow distributor according to claim 1, wherein: the diameter of an orifice on the orifice plate (2) is 1/3-1/4 of the diameter of the inlet of the mixing pipe (1).

5. The gas-liquid two-phase flow distributor according to claim 1, wherein: the first distribution chamber outlet pipe (11) and the second distribution chamber outlet pipe (12) are close to the fixed partition (8).

6. The gas-liquid two-phase flow distributor according to claim 1, 2 or 5, characterized in that: the volume ratio of the first distribution cavity (151) to the second distribution cavity (152) is 0.2-10.

7. The gas-liquid two-phase flow distributor according to claim 1, wherein: the support (7) consists of an inner ring (701), an outer ring (702) and a ribbed plate (703).

8. The gas-liquid two-phase flow distributor according to any one of claims 1 to 7, wherein: the gas-liquid two-phase flow distributor is arranged vertically or horizontally.

9. A gas-liquid two-phase flow distribution method is characterized in that the gas-liquid two-phase flow distributor disclosed by claim 1 is used, gas-liquid two-phase flow enters a mixing pipe (1), firstly flows through a throttling hole on a throttling orifice plate (2), the flow rate is increased, premixing is carried out, then the gas-liquid two-phase flow enters a spiral flow channel and flows spirally, further mixing is carried out fully, and a gas-liquid mixture in a uniform homogeneous flow state is formed, then the gas-liquid mixture flows through a distribution plate (5) and a support (7) and enters a first distribution cavity (151) and a second distribution cavity (152), the gas-liquid mixture in the first distribution cavity (151) flows out from an outlet pipe (11) of the first distribution cavity, and the gas-liquid mixture in the second distribution cavity (152) flows out from.

10. The method of claim 9, wherein: rotating the rotating shaft (10) to rotate the rotating shaft (10) and the rotating partition plate (9) around the axis of the rotating shaft (10) to change the volume ratio of the first distribution chamber (151) to the second distribution chamber (152).

Technical Field

The invention belongs to the technical field of gas-liquid two-phase flow and fluid distribution, and relates to a gas-liquid two-phase flow distributor and a gas-liquid two-phase flow distribution method.

Background

The gas-liquid two-phase flow pattern is more and non-uniform, and various flow patterns can appear under different gas-liquid flow rates. In certain flow regimes, particularly in the slug flow regime, there are often severe fluctuations in pressure and gas-liquid flow across the sections of the pipeline. Strictly speaking, a gas-liquid two-phase flow pipeline is always in an unstable flow state.

The method has corresponding application to proportional distribution and uniform sampling operation of gas-liquid two-phase flow in different industrial fields such as petroleum, chemical industry, nuclear industry and the like. The proportional distribution of a two-phase gas-liquid stream is more difficult than the proportional distribution of a single-phase stream. The existing Y-shaped or T-shaped gas-liquid two-phase flow distributor divides gas and liquid into two flows for output after mixing. Because the gas-liquid phase distribution of the gas-liquid two-phase flow is extremely uneven under most flow patterns (such as slug flow, stratified flow and bubble flow), the Y-shaped or T-shaped distributor is difficult to accurately distribute the gas-liquid two-phase flow in proportion, and the requirements of certain accurate reactors cannot be met.

Disclosure of Invention

The invention aims to provide a gas-liquid two-phase flow distributor and a gas-liquid two-phase flow distribution method, and aims to solve the problem that the gas-liquid two-phase flow cannot be accurately distributed in proportion in the existing distributor.

In order to solve the problems, the invention adopts the technical scheme that: a gas-liquid two-phase flow distributor characterized by: the mixing and distributing device is provided with a mixing pipe and a distributing cavity barrel, wherein an outlet of the mixing pipe is connected with an inlet of the distributing cavity barrel, an end plate is arranged at the other end of the distributing cavity barrel, a spiral plate is axially arranged in the mixing pipe, the inner side of the spiral plate is connected with the outer surface of a rod piece, the outer side of the spiral plate is connected with the inner surface of the mixing pipe, two adjacent circles of spiral plates form a spiral flow channel between the outer surface of the rod piece and the inner surface of the mixing pipe, a throttling pore plate is arranged near the inlet of the mixing pipe, a distributing plate is arranged near the outlet of the mixing pipe, a support is arranged near the inlet of the distributing cavity barrel, a rotating shaft is arranged along the axial lead of the distributing cavity barrel, one end of the rotating shaft is supported on the support, the other end of the rotating shaft extends out of an opening on the end, A space with a circular cross section is formed between the end plate and the support, the fixed partition plate and the rotary partition plate divide the space into a first distribution cavity and a second distribution cavity, a first distribution cavity outlet pipe and a second distribution cavity outlet pipe are arranged on the end plate, the first distribution cavity outlet pipe is communicated with the first distribution cavity, and the second distribution cavity outlet pipe is communicated with the second distribution cavity.

A gas-liquid two-phase flow distribution method is characterized in that the gas-liquid two-phase flow distributor is used, gas-liquid two-phase flow enters a mixing pipe, firstly flows through a throttling hole on a throttling hole plate, the flow rate is increased, premixing is carried out, then the gas-liquid two-phase flow enters a spiral flow channel to spirally flow, further sufficient mixing is carried out, a gas-liquid mixture in a uniform homogeneous flow state is formed, then the gas-liquid mixture flows through a distribution plate and a support and enters a first distribution cavity and a second distribution cavity, the gas-liquid mixture in the first distribution cavity flows out from an outlet pipe of the first distribution cavity, and the gas-liquid mixture in the second distribution cavity flows.

The invention has the following beneficial effects: (1) the uneven gas-liquid two-phase flow becomes a gas-liquid mixture in a uniformly mixed homogeneous flow state after flowing through the orifice plate and the spiral flow channel; the phase distribution is single, which is beneficial to uniform distribution. The gas-liquid mixture flows out from the distribution holes on the distribution plate and is uniformly distributed on the cross section at the outlet of the mixing pipe. According to the volume ratio of the first distribution cavity to the second distribution cavity, the flow rates of the gas-liquid mixture entering the first distribution cavity and the gas-liquid mixture entering the second distribution cavity can be distributed in proportion relatively accurately, and the gas-liquid mixture in the two distribution cavities flows out from the outlet pipe of the first distribution cavity and the outlet pipe of the second distribution cavity respectively, so that the gas-liquid mixture is divided into two parts in proportion relatively accurately, and the distribution accuracy is higher than that of an existing Y-shaped or T-shaped distributor. (2) The rotating shaft can rotate the rotating shaft and the rotating partition plate around the axial line of the rotating shaft to change the volume ratio of the first distribution cavity to the second distribution cavity, so that the flow ratio of the gas-liquid mixture entering the first distribution cavity to the second distribution cavity is changed, the flow ratio of the two gas-liquid mixtures flowing out of the outlet pipe of the first distribution cavity and the outlet pipe of the second distribution cavity is adjusted, the distribution ratio of the two gas-liquid mixtures is adjusted, and different requirements are met. (3) The dispenser of the present invention is relatively simple in construction and operation and is suitable for industrial use.

The invention can be used in the fields of petroleum, chemical industry, nuclear industry and the like, and realizes the proportional accurate distribution of gas-liquid two-phase flow.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The drawings and detailed description do not limit the scope of the invention as claimed.

Drawings

FIG. 1 is a schematic diagram of the structure of a gas-liquid two-phase flow distributor according to the present invention.

Fig. 2 is a left side view of the stent of fig. 1.

Fig. 3 is a sectional view a-a in fig. 1.

In fig. 1 to 3, the same reference numerals denote the same technical features.

Detailed Description

Referring to fig. 1, 2 and 3, the gas-liquid two-phase flow distributor (simply referred to as distributor) of the present invention is provided with a mixing tube 1 and a distribution chamber cylinder 6, an outlet of the mixing tube 1 is connected with an inlet of the distribution chamber cylinder 6 through a flange, and the other end of the distribution chamber cylinder 6 is provided with an end plate 13. The mixing tube 1 is internally provided with a spiral plate 3 along the axial direction, the inner side edge of the spiral plate 3 is connected (welded) with the outer surface of the rod piece 4, and the outer side edge is connected (welded) with the inner surface of the mixing tube 1. Spiral flow channels are formed between the outer surfaces of the two adjacent circles of spiral plates 3 and the rod piece 4 and the inner surface of the mixing pipe 1. The rod 4 is a generally cylindrical steel rod. An orifice plate 2 is arranged near the inlet of the mixing pipe 1, and the orifice plate 2 is a standard part generally and is welded on the inner surface of the mixing pipe 1. A distribution plate 5 is arranged near the outlet of the mixing pipe 1, a bracket 7 is arranged near the inlet of the distribution chamber cylinder 6, and the distribution plate 5 and the bracket 7 are respectively welded on the inner surfaces of the mixing pipe 1 and the distribution chamber cylinder 6. The inlet of the spiral flow channel is close to the orifice plate 2, and the outlet is close to the distribution plate 5.

A rotating shaft 10 is provided along the axis of the barrel 6 of the dispensing chamber, one end of the rotating shaft 10 being supported on the support 7 and the other end extending through an opening in the end plate 13, between which opening a seal 14 is provided. The outer end portion of the rotating shaft 10 has a regular hexagonal prism shape so that the rotating shaft 10 can be rotated by a wrench or other means.

Between the bracket 7 and the end plate 13, a fixed partition plate 8 is arranged on the inner surface of the distribution cavity cylinder 6, and a rotary partition plate 9 is arranged on the outer surface of the rotary shaft 10. A space having a circular cross section is formed between the distribution chamber cylinder 6, the rotary shaft 10, the end plate 13 and the support 7 (more specifically, a space having a circular cross section is formed between the inner surface of the distribution chamber cylinder 6, the outer surface of the rotary shaft 10, the end surface of the end plate 13 connected to the other end of the distribution chamber cylinder 6, and the side surface of the support 7 near the end surface), and the fixed partition plate 8 and the rotary partition plate 9 partition the space into a first distribution chamber 151 and a second distribution chamber 152. End plate 13 is provided with a first distribution chamber outlet pipe 11 and a second distribution chamber outlet pipe 12, first distribution chamber outlet pipe 11 communicating with first distribution chamber 151, and second distribution chamber outlet pipe 12 communicating with second distribution chamber 152. Rotating the rotating shaft 10 may rotate the rotating shaft 10 and the rotating partition 9 about the axis of the rotating shaft 10 to change the volume ratio of the first distribution chamber 151 to the second distribution chamber 152.

The mixing tube 1 may be a straight tube with a circular cross-section. However, the mixing tube 1 is preferably a tapered tube (as shown in fig. 1) having a frusto-conical shape with an inlet diameter greater than an outlet diameter. The included angle between the generatrix of the mixing tube 1 and the axial lead is generally 3-10 degrees. The ratio of the outlet diameter to the inlet diameter of the mixing tube 1 is generally 0.5 to 0.9, preferably 0.7 to 0.8. The diameter is the inner diameter.

The distribution chamber cylinder 6 is cylindrical, the end plate 13 is a circular flat plate, and the rotating shaft 10 is cylindrical, which are all arranged coaxially with the mixing tube 1. The distribution plate 5 is a circular flat plate and is uniformly distributed with distribution holes; the distribution holes are generally round holes with the same diameter, the diameter is generally 20-30 mm, and the aperture ratio is generally 50-60%. The fixed partition 8 and the rotating partition 9 are rectangular plates, the short sides of which are located generally radially of the axis of rotation 10 and the dispensing chamber cylinder 6. One long side of the fixed baffle plate 8 is welded on the inner surface of the barrel 6 of the distribution chamber, and the other long side is attached on the outer surface of the rotating shaft 10 (with clearance fit therebetween). One short side of the fixed baffle plate 8 is welded on the end surface of the end plate 13 connected with the other end of the distribution chamber cylinder 6, and the other short side is welded on the bracket 7. One long side of the rotary partition 9 is welded on the outer surface of the rotary shaft 10, and the other long side is attached to the inner surface of the barrel 6 of the distribution chamber (with clearance fit therebetween). One short edge of the rotary clapboard 9 is jointed on the end surface (clearance fit is formed between the end plate 13 and the end surface connected with the other end of the distribution cavity cylinder 6), and the other short edge is close to the bracket 7.

The spiral plate 3 in the mixing tube 1 is generally in the shape of a right-circular conical spiral and can rotate left or right. The number of turns of the spiral plate 3 is generally 2-5 turns along the axial direction of the mixing pipe 1 and over the length of the diameter of the inlet of one mixing pipe 1. The mixing pipe 1 adopts a tapered pipeline, the spiral plate 3 adopts a right-circular cone spiral surface shape, the cross-sectional area of a spiral flow passage from the inlet of the spiral flow passage to the outlet of the spiral flow passage can be continuously reduced, and gas-liquid two-phase flow continuously accelerates when flowing in the spiral flow passage, so that the gas-liquid full mixing and uniform distribution are facilitated.

The diameter (minimum diameter) of the throttling hole on the throttling orifice plate 2 is generally 1/3-1/4 of the diameter of the inlet of the mixing pipe 1.

The primary distribution chamber outlet pipe 11 and the secondary distribution chamber outlet pipe 12 are generally adjacent the fixed partition 8. The volume ratio of the first distribution chamber 151 to the second distribution chamber 152 is generally 0.2 to 10.

The support 7 shown in fig. 1 and 2 is composed of an inner ring 701, an outer ring 702, and ribs 703. The inner ring 701 and the outer ring 702 are short circular tubes and are coaxially arranged. The rib plates 703 are a plurality of rectangular plates, are arranged along the radial direction of the inner ring 701 and the outer ring 702, and are uniformly distributed around the circumferential direction of the inner ring 701 and the outer ring 702, so that the influence on the uniformity of the gas-liquid mixture flowing through the distribution plate 5 is reduced as much as possible. The space between two adjacent ribs 703 and between the inner ring 701 and the outer ring 702 can be flowed through by the gas-liquid mixture. One end of the rotating shaft 10 is inserted into a center hole of the inner ring 701 to be supported.

The distributor can be arranged vertically or horizontally, and the materials of all the parts are generally stainless steel.

The gas-liquid two-phase flow distribution method of the invention uses the gas-liquid two-phase flow distributor. The inlet of the mixing pipe 1 is connected to the upstream two-phase flow line via a flange, and the first distribution chamber outlet pipe 11 and the second distribution chamber outlet pipe 12 are connected to two lines leading to two ports of the precision reactor, respectively. In operation, a gas-liquid two-phase flow enters the mixing tube 1, first flows through the orifice on the orifice plate 2, the flow rate is increased and premixing is performed. The increased flow rate facilitates atomization of the liquid phase, thereby improving the gas-liquid premixing effect.

The throttled gas-liquid two-phase flow enters the spiral flow channel from the inlet of the spiral flow channel to spirally flow, is further fully mixed to form a uniformly mixed gas-liquid mixture in a homogeneous flow state, and flows out from the outlet of the spiral flow channel. The gas-liquid mixture then flows through the distribution holes of the distribution plate 5, is uniformly distributed on the cross section at the outlet of the mixing tube 1, then flows through the outlet of the mixing tube 1, the inlet of the distribution chamber cylinder 6 and the support 7, and enters the first distribution chamber 151 and the second distribution chamber 152. The gas-liquid mixture in the first distribution chamber 151 flows out of the outlet pipe 11 of the first distribution chamber and flows to a port of the precision reactor through a pipeline; the gas-liquid mixture in the second distribution chamber 152 flows out of the second distribution chamber outlet pipe 12 and flows through the pipeline to the other interface of the precision reactor. The flow rates of the two gas-liquid mixtures can be controlled in proportion relatively accurately, and reliable inlet conditions are provided for the operation of a precise reactor.

Rotating the rotating shaft 10 can rotate the rotating shaft 10 and the rotating partition plate 9 around the axis of the rotating shaft 10 to change the volume ratio of the first distribution chamber 151 to the second distribution chamber 152, thereby changing the flow rate ratio of the gas-liquid mixture entering the first distribution chamber 151 and the second distribution chamber 152, adjusting the flow rate ratio of the two gas-liquid mixtures flowing out of the first distribution chamber outlet pipe 11 and the second distribution chamber outlet pipe 12, and realizing adjustment of the distribution ratio of the two gas-liquid mixtures.

In the above operation process, the gas in the gas-liquid is generally chemical hydrocarbon gas to be reacted, and the liquid is generally chemical hydrocarbon liquid to be reacted or a liquid-phase additive. The pressure of the gas-liquid mixture in the outlet pipe 11 of the first distribution cavity and the outlet pipe 12 of the second distribution cavity is matched with the pressure of the precise reactor, and the gas-liquid volume ratio is generally 8-20. During operation, the gas-liquid mixture is sprayed from the distribution holes of the distribution plate 5, and all the cavities of the distribution plate 5 to the outlet pipes 11 and 12 of the first distribution chamber (including the first distribution chamber 151 and the second distribution chamber 152) are filled with the gas-liquid mixture.

The clearance fit of each part can cause gas-liquid leakage and cause a small amount of flow errors. This is inevitable and is allowed by the precision reactor.