阅读说明：本技术 一种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),混合管内设有螺旋板(3)和节流孔板(2)。混合管的出口与开孔筒体(7)的内腔相通,开孔筒体设于分配腔筒体(6)的内腔中。转动板(10)上设有转动轴(15),分配腔筒体的内表面上设有固定隔板(8),开孔筒体(7)的外表面上设有转动隔板(9)。第一分配腔出口管(11)与第一分配腔(16)相通,第二分配腔出口管(12)与第二分配腔(17)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 pipe (1), and a spiral plate (3) and a throttling orifice plate (2) are arranged in the mixing pipe. The outlet of the mixing pipe is communicated with the inner cavity of the perforated cylinder (7), and the perforated cylinder is arranged in the inner cavity of the distribution cavity cylinder (6). The rotating plate (10) is provided with a rotating shaft (15), the inner surface of the distribution cavity cylinder is provided with a fixed clapboard (8), and the outer surface of the perforated cylinder (7) is provided with a rotating clapboard (9). The first distribution chamber outlet duct (11) communicates with the first distribution chamber (16) and the second distribution chamber outlet duct (12) communicates with the second distribution chamber (17). 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 tube is provided with a mixing tube (1), a spiral plate (3) is axially arranged in the mixing tube (1), the inner side of the spiral plate (3) is connected with the outer surface of a rod piece (4), the outer side of the spiral plate is connected with the inner surface of the mixing tube (1), a spiral flow channel is formed between the outer surface of the rod piece (4) and the inner surface of the mixing tube (1), a throttling pore plate (2) is arranged near the inlet of the mixing tube (1), a mixing tube outlet plate (5) is arranged at the outlet of the mixing tube (1), the outlet of the mixing tube (1) is communicated with the inner cavity of a perforated cylinder body (7), the perforated cylinder body (7) is arranged in the inner cavity of a distribution cavity cylinder body (6), one end of the distribution cavity cylinder body (6) is connected with the mixing tube outlet plate (5), an end plate (13) is arranged at the other end of the distribution cavity cylinder body (6), a circular groove is arranged on the end surface of the mixing tube outlet plate (5), the inlet end of the perforated cylinder (7) is inserted into the circular groove, the other end of the perforated cylinder (7) is connected with one end face of the rotating plate (10), the rotating plate (10) is provided with a rotating shaft (15), the inner surface of the distribution cavity cylinder (6) is provided with a fixed baffle plate (8), the outer surface of the perforated cylinder (7) is provided with a rotating baffle plate (9), the distribution cavity cylinder (6) and the perforated cylinder (7), a space with a circular cross section is formed between the mixing pipe outlet plate (5) and the rotating plate (10), the fixed partition plate (8) and the rotating partition plate (9) divide the space into a first distribution cavity (16) and a second distribution cavity (17), a first distribution cavity outlet pipe (11) and a second distribution cavity outlet pipe (12) are arranged on the distribution cavity cylinder body (6), the first distribution cavity outlet pipe (11) is communicated with the first distribution cavity (16), and the second distribution cavity outlet pipe (12) is communicated with the second distribution cavity (17).

2. 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).

3. The gas-liquid two-phase flow distributor according to claim 1 or 2, characterized in that: the volume ratio of the first distribution cavity (16) to the second distribution cavity (17) is 0.2-10.

4. A gas-liquid two-phase flow distributor according to claim 1, 2 or 3, wherein: along the axial direction of the mixing pipe (1), on the length of the diameter of one mixing pipe (1), the number of turns of the spiral plate (3) in the mixing pipe (1) is 2-5 turns.

5. 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 mixing pipe (1).

6. The gas-liquid two-phase flow distributor according to any one of claims 1 to 5, wherein: the gas-liquid two-phase flow distributor is arranged vertically or horizontally.

7. A gas-liquid two-phase flow distribution method is characterized in that the gas-liquid two-phase flow distributor according to the claim (1) is used, the 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 improved, premixing is carried out, then the gas-liquid two-phase flow enters a spiral flow channel to carry out spiral flow, further sufficient mixing is carried out to obtain a gas-liquid mixture in a uniformly mixed homogeneous flow state, then the gas-liquid mixture flows out from an outlet of the mixing pipe (1), the gas-liquid mixture in the inner cavity of the perforated cylinder (7) flows out from the openings on the perforated cylinder (7) and enters a first distribution cavity (16) and a second distribution cavity (17), the gas-liquid mixture in the first distribution cavity (16) flows out from a first distribution cavity outlet pipe (11), and the gas-liquid mixture in the second distribution cavity (17) flows out from a second distribution cavity outlet pipe (12).

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 tube is provided with a mixing tube, a spiral plate is arranged in the mixing tube along the axial direction, the inner side edge of the spiral plate is connected with the outer surface of a rod piece, the outer side edge of the spiral plate is connected with the inner surface of the mixing tube, two adjacent circles of spiral plates and a spiral flow channel are formed between the outer surface of the rod piece and the inner surface of the mixing tube, a throttling orifice plate is arranged near the inlet of the mixing tube, a mixing tube outlet plate is arranged at the outlet of the mixing tube, the outlet of the mixing tube is communicated with the inner cavity of a perforated tube body, the perforated tube body is arranged in the inner cavity of a distribution cavity tube body, one end of the distribution cavity tube body is connected with the mixing tube outlet plate, an end plate is arranged at the other end of the distribution cavity tube body, a circular groove is arranged on the end surface of the mixing tube outlet plate, which is close to the inner cavity of the distribution cavity body, the outer surface of the perforated cylinder is provided with a rotary partition plate, a space with a circular cross section is formed among the distribution cavity cylinder, the perforated cylinder, the mixing pipe outlet plate and the rotary plate, the fixed partition plate and the rotary partition plate divide the space into a first distribution cavity and a second distribution cavity, the distribution cavity cylinder is provided with a first distribution cavity outlet pipe and a second distribution cavity outlet pipe, 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 flow spirally, further mixing is carried out fully, the gas-liquid mixture in a uniform homogeneous flow state is formed, then the gas-liquid mixture flows out of an outlet of the mixing pipe and enters an inner cavity of a perforated cylinder, the gas-liquid mixture in the inner cavity of the perforated cylinder flows out of a perforated hole on the perforated cylinder and enters a first distribution cavity and a second distribution cavity, the gas-liquid mixture in the first distribution cavity flows out of an outlet pipe of the first distribution cavity.

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 of the openings on the opening cylinder, and the flow rate of the gas-liquid mixture flowing out of each opening is basically equal. 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 perforated cylinder and the rotating partition plate around the axial line of the perforated cylinder to change the volume ratio of the first distribution cavity and the second distribution cavity, so that the flow ratio of the gas-liquid mixture entering the first distribution cavity and 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 sectional view a-a in fig. 1.

Figure 3 is a schematic view of a preferred arrangement of the outlet pipe of the first distribution chamber, the outlet pipe of the second distribution chamber and the fixed partition.

In fig. 1 to 3, the same reference numerals denote the same technical features. The perforated cartridge of fig. 1 is shown in partial section.

Detailed Description

Referring to fig. 1 and 2, 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 spiral plate 3 is provided in the mixing tube 1 in the axial direction. The inner side edge of the spiral plate 3 is connected (welded) with the outer surface of the rod piece 4, the outer side edge of the spiral plate is connected (welded) with the inner surface of the mixing pipe 1, and a spiral flow channel is formed between the outer surfaces of the spiral plate 3 and the rod piece 4 of two adjacent circles 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. The outlet of the mixing pipe 1 is provided with a mixing pipe outlet plate 5, the outlet of the mixing pipe 1 is communicated with the inner cavity of the perforated cylinder 7, and the perforated cylinder 7 is arranged in the inner cavity of the distribution cavity cylinder 6. The holes on the hole-opening cylinder 7 are generally circular holes (drilled by a drill), the diameter is generally 20-30 mm, and the same diameter is adopted; the open pores are uniformly distributed on the open pore cylinder 7, and the open pore rate is generally 60-65%. One end of the distribution cavity cylinder 6 is connected with the mixing pipe outlet plate 5, and the other end of the distribution cavity cylinder 6 is provided with an end plate 13.

The end face of the mixing pipe outlet plate 5, which is close to the inner cavity of the distribution cavity cylinder 6, is provided with a circular groove, and the inlet end of the perforated cylinder 7 is inserted into the circular groove. This structure can function as a seal and support for the inlet end of the perforated cylinder 7. The end face and the side face of the inlet end of the perforated cylinder body 7 are in clearance fit with the bottom face and the side face of the circular groove respectively, and the rotation of the perforated cylinder body 7 is not hindered. The other end of the perforated cylinder 7 is connected (welded) to one end face of the rotating plate 10. The rotating plate 10 is provided with a rotating shaft 15, the rotating shaft 15 extends from an opening in the end plate 13, and a sealing member 14 is provided between the opening and the rotating shaft 15. The outer end portion of the rotating shaft 15 has a regular hexagonal prism shape so that the rotating shaft 15 is rotated by a wrench or other means.

The inner surface of the distribution cavity cylinder 6 is provided with a fixed clapboard 8, and the outer surface of the perforated cylinder 7 is provided with a rotating clapboard 9. A space with a circular cross section is formed between the distribution chamber cylinder 6, the hole opening cylinder 7, the mixing tube outlet plate 5 and the rotating plate 10 (more specifically, a space with a circular cross section is formed between the inner surface of the distribution chamber cylinder 6, the outer surface of the hole opening cylinder 7, the end surface of the mixing tube outlet plate 5 adjacent to the inner cavity of the distribution chamber cylinder 6 and the end surface of the rotating plate 10 connected with the other end of the hole opening cylinder 7), and the fixed partition plate 8 and the rotating partition plate 9 divide the space into a first distribution chamber 16 and a second distribution chamber 17. The distribution chamber cylinder 6 is provided with a first distribution chamber outlet pipe 11 and a second distribution chamber outlet pipe 12, the first distribution chamber outlet pipe 11 is communicated with the first distribution chamber 16, and the second distribution chamber outlet pipe 12 is communicated with the second distribution chamber 17. Rotating the rotating shaft 15 may rotate the perforated cylinder 7 and rotating diaphragm 9 about the axis of the perforated cylinder 7 to vary the volume ratio of the first distribution chamber 16 to the second distribution chamber 17.

The mixing tube 1, the perforated cylinder 7 and the distribution cavity cylinder 6 are all cylindrical and are coaxially arranged. The mixing pipe outlet plate 5 is a circular ring-shaped flat plate and is welded with the outlet of the mixing pipe 1 and one end of the distribution cavity cylinder 6; the other end of the distribution chamber cylinder 6 is welded to the end plate 13. The fixed partition 8 and the rotating partition 9 are rectangular plates whose short sides are generally located in the radial direction of the perforated cylinder 7 and the distribution chamber cylinder 6. One long edge of the fixed baffle plate 8 is welded on the inner surface of the cylinder body 6 of the distribution chamber, and the other long edge is attached on the outer surface of the cylinder body 7 with the holes (in clearance fit). One short side of the fixed baffle plate 8 is welded on the end surface of the rotating plate 10 connected with the other end of the perforated cylinder 7, and the other short side is welded on the end surface of the mixing pipe outlet plate 5 next to the inner cavity of the distribution chamber cylinder 6. One long edge of the rotary partition plate 9 is welded on the outer surface of the perforated cylinder 7, and the other long edge is attached to the inner surface of the distribution chamber cylinder 6 (in clearance fit). One short edge of the rotary partition plate 9 is attached to the end face of the rotary plate 10 connected with the other end of the perforated cylinder 7 (in clearance fit therebetween), and the other short edge is attached to the end face of the mixing tube outlet plate 5 adjacent to the inner cavity of the distribution chamber cylinder 6 (in clearance fit therebetween). The rotating plate 10 is a circular flat plate, the side surfaces of the rotating plate are attached to the inner surface of the distribution cavity cylinder 6 (clearance fit is formed between the rotating plate and the distribution cavity cylinder), and the rotating shaft 15 is welded at the center of the rotating plate 10.

As shown in fig. 1 and 2, the first dispensing chamber outlet conduit 11 and the second dispensing chamber outlet conduit 12 are coaxially disposed along a diameter of the dispensing chamber cylinder 6, with the first dispensing chamber outlet conduit 11 being adjacent the fixed partition 8. In a preferred form of the invention shown in fig. 3, the first outlet chamber pipe 11 and the second outlet chamber pipe 12 are close to the fixed partition 8; in this arrangement, the volume ratio of the first distribution chamber 16 to the second distribution chamber 17 is generally 0.2 to 10. Fig. 3 corresponds to a cross-sectional view taken at a position a-a in fig. 1.

The spiral plate 3 is generally in a shape of a right spiral and can rotate left or right. The number of turns of the helical plate 3 in the mixing tube 1 is generally 2-5 turns along the axial direction of the mixing tube 1 over the length of the diameter (inner diameter) of one mixing tube 1. 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 mixing pipe 1.

The dispenser of the present invention is preferably in a vertical arrangement (as shown in figure 1). The arrangement mode takes the gravity borne by the gas-liquid mixture in the inner cavity of the perforated cylinder 7 into consideration, and is favorable for the gas-liquid mixture to flow out more uniformly from the holes in the perforated cylinder 7 in the circumferential direction of the perforated cylinder 7. The dispenser of the present invention may also be a horizontal arrangement.

The materials of the components of the distributor are stainless steel generally.

The gas-liquid two-phase flow distribution method of the invention uses the gas-liquid two-phase flow distributor. The inlet of the distributor mixing pipe 1 is connected to the upstream two-phase flow pipe by a flange, and the first distribution chamber outlet pipe 11 and the second distribution chamber outlet pipe 12 are connected to two pipes 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 to spirally flow and is further fully mixed to form a gas-liquid mixture in a uniformly mixed homogeneous flow state. Then, the gas-liquid mixture flows out from the outlet of the mixing pipe 1 and enters the inner cavity of the perforated cylinder 7. The gas-liquid mixture in the inner cavity of the perforated cylinder 7 flows out of the perforations in the perforated cylinder 7 into the first distribution chamber 16 and the second distribution chamber 17. The gas-liquid mixture in the first distribution chamber 16 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 17 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.

The rotating shaft 15 is rotated to rotate the perforated cylinder 7 and the rotating partition 9 around the axial line of the perforated cylinder 7, so as to change the volume ratio of the first distribution chamber 16 to the second distribution chamber 17, thereby changing the flow ratio of the gas-liquid mixture entering the first distribution chamber 16 to the second distribution chamber 17, and adjusting the flow ratio of the two gas-liquid mixtures flowing out from the first distribution chamber outlet pipe 11 and the second distribution chamber outlet pipe 12, thereby adjusting 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 interior cavity of the perforated cylinder 7, the first distribution chamber 16, the second distribution chamber 17, the first distribution chamber outlet pipe 11 and the second distribution chamber outlet pipe 12 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. The gas-liquid mixture leaks from the gap between the side surface of the rotating plate 10 and the inner surface of the distribution chamber cylinder 6 to the space between the rotating plate 10 and the end plate 13, and when the space is filled, the gas-liquid mixture does not leak from the gap.