CN2756309Y

CN2756309Y - Pumping vortex type gas-liquid distributor

Info

Publication number: CN2756309Y
Application number: CN 200420115970
Authority: CN
Inventors: 王少兵; 张占柱; 渠红亮; 毛俊义; 曾祥根
Original assignee: Sinopec Research Institute of Petroleum Processing; China Petroleum and Chemical Corp
Current assignee: Sinopec Research Institute of Petroleum Processing; China Petroleum and Chemical Corp
Priority date: 2004-11-30
Filing date: 2004-11-30
Publication date: 2006-02-08
Anticipated expiration: 2014-11-30

Abstract

The utility model relates to a pumping vortex type gas-liquid distributor. The gas-liquid distributor is composed of a bubble cap (2), a central tube (3), a vortex structure (1), and a flange (4), wherein the bubble cap (2) is a cylinder with uniform cloth strip gaps (5) at the bottom, the vortex structure (1) is fixed at the top part of the central tube (3) in the bubble cap (2) by a screw bolt, the central tube (3) is fixed on the inner wall at the top part of the bubble cap (2) by a support ear (6) and a screw bolt, and the central tube (3) is welded with the flange (4). The distributor is capable of better dispersing and atomizing liquid phases so that gas liquid phase streams in the hydrogenation reactor bed can be uniformly distributed to a catalyst bed.

Description

A kind of suction cyclone-type gas-liquid allotter

Technical field

The utility model relates to the gas-liquid allotter of a kind of gas-liquid two-phase and stream, is particularly useful for the uniform distribution of biphase gas and liquid flow in the trickle bed hydrogenation reactor.

Background technology

In hydrogenation reactor, the fluid distribution performance directly influences the uniformity of reactant and catalyst time of contact, influence the inside and outside surface of catalyst by the wetting degree of liquid and since skewness form collude stream and short circuit etc., and finally can influence the distribution of bed temperature and the quality of product.Particularly reactor is to maximization, when product develops to the direction that becomes more meticulous, and the importance that fluid distributes is just more outstanding.Therefore, the design of good reactor inner member is and is important.Both at home and abroad the research and the engineering development of hydrogenation reactor inner member are paid much attention to always, many engineering companies have all developed the complete set technology of oneself.

Be uniform-distribution with many distributors on the distribution plate, each distributor is allocation units, and gas-liquid two-phase by distributor, is evenly distributed to beds jointly.The development of distributor is varied, and the distributor of present industrial application can be divided three classes by the liquid phase mode of entrance: overflow type, suction type and both mixed types.

US3, Fig. 3 of 524,731 are typical overflow type distribution plate, are made up of the length pipe, and when liquid phase exceeded short tube on the distribution plate, liquid phase entered bed with regard to overflow, and gas phase enters bed through long tube, the gas-liquid eddy flow.See that from the part gas-liquid distribution is irregular, but by many combinations to the length pipe on the whole distribution plate, can obtaining substantially uniformly, gas-liquid flow distributes.Overflow type distributor main feature is that pressure drop is little, is fit to high viscosity medium, but distributes performance very responsive to the distribution plate levelness, to distribution plate processing, installation requirement than higher.

US3,218, Fig. 2 of 249 is typical suction type, form by central tube and the bubble cap of opening bar seam, when liquid level is higher than the bubble cap lower edge, the high velocity air that enters from the bubble cap slot produces strong swabbing action in the annular space of bubble cap and central tube, cause liquid phase to be dashed and be broken into drop and enter central tube for ascending air carries, and realizes the even distribution of gas-liquid.The advantage of suction type distributor is to distribute performance low to distribution plate levelness sensitiveness, overall co-ordination distributes performance good, but shortcoming is to exist one all to be difficult for the center stream that disperses under the single gas-liquid allotter under any operating mode, and the liquid bad adaptability bigger to viscosity, and pressure drop is also big.

Fig. 1 of CN2355786Y is the combination of suction type and overflow type, adopting the enlarging form except the central tube end increases the liquid spraying area, mainly established spout hole newly, taken into account overflow type pressure and fallen little and the advantage suction type distributed uniform, also improved operating flexibility simultaneously in the central tube bottom.From the development trend of distribution plate, the combined distributor of suction type or suction type and overflow type is the target of developing from now on.

The more distributor of China's application at present mainly is US3,218,249 distributor shown in Figure 2, this distributor has the good whole distributing uniformity, but local allocation is also inhomogeneous: liquid phase material is normal distribution, and about 70% above liquid phase material concentrate be distributed in the distributor central tube under, cause liquid phase material can not be uniformly distributed on the catalyst bed layer cross section, influenced reaction fully, homogeneous carries out.

The utility model content

The purpose of this utility model is the shortcoming of confluxing at the ubiquitous center of present suction type gas-liquid allotter, design and a kind ofly distribute that performance is good, the suction cyclone-type gas-liquid allotter of stable operation, it is lower to make liquid phase be sprayed at the peak value of beds, fully contacts with catalyst to reach logistics.

The suction cyclone-type gas-liquid allotter structure of the utility model design is as follows:

This suction cyclone-type gas-liquid allotter is to be made of bubble cap, central tube, cyclone structure and flanged plate, wherein bubble cap is the cylinder of the equal cloth seam in bottom, cyclone structure is by in the central tube of bolting in bubble cap, central tube is by journal stirrup and be bolted on the bubble cap top inner wall central tube and flanged plate welding.

The distributor of the utility model design can make liquid phase be disperseed better and atomize, makes the interior gas-liquid phase logistics of hydrogenation reactor bed be evenly distributed to beds.

Description of drawings

Accompanying drawing is the suction cyclone-type gas-liquid allotter schematic diagram of the utility model design.

The specific embodiment

More detailed structure is as follows for the suction cyclone-type gas-liquid allotter of the utility model design:

Bubble cap is the cylinder of the equal cloth seam in bottom, and the bubble cap top diameter is less than or equal to its base diameter.4-8 bar seam evenly is set in the bubble cap bottom, the bar seam be shaped as quadrangle or triangle, the preferred rectangle of quadrangle wherein, the preferred isosceles triangle of triangle.

Cyclone structure is made up of 4-6 spinning disk, is placed in the central tube, and the angle of spinning disk and central tube center line is 5-30 °.The cyclone structure effect is: when gas phase is carried liquid phase when entering central tube, cyclone structure makes the living eddy flow of gas-liquid mixed miscarriage in the central tube, fluid flows to the central tube inwall because of the centrifugal action part, increased the cross component of mixed flow, make the center stream that exists under the distributor be able to effective dispersion, help enlarging the distribution of liquid phase simultaneously.

Central tube is up-small and down-big taper flared tube or equal diameter pipe, and central tube top and bottom are all uncovered, and central tube is by journal stirrup and be bolted on the bubble cap top inner wall central tube and flanged plate welding.By flanged plate whole distributor and reactor gripper shoe are fixed.

Below in conjunction with accompanying drawing the suction cyclone-type gas-liquid allotter that the utility model designs is given further instruction.

This suction cyclone-type gas-liquid allotter is to be made of bubble cap 2, central tube 3, cyclone structure 1 and flanged plate 4, wherein bubble cap 2 is the cylinder of the equal cloth seam 5 in bottom, cyclone structure 1 is by in the central tube 3 of bolting in bubble cap 2, central tube 3 is by journal stirrup 6 and be bolted on bubble cap 2 top inner wall central tube 3 and flanged plate 4 welding.

Cyclone structure 1 is made up of 4-6 spinning disk, is placed in the central tube 3, and the angle of the center line of spinning disk and central tube 3 is 5-30 °.

Bar seam 5 evenly is set in bubble cap 2 bottoms, accompanying drawing discal patch seam be shaped as rectangle, also triangle or other quadrangle are as isosceles triangle or square.

The suction cyclone-type gas-liquid allotter operation principle of the utility model design is as follows:

Gas phase is mainly stitched 5 annular spaces that enter between bubble cap 2 and the central tube 3 by the bar of bubble cap 2; Liquid phase is aspirated the annular space that enters between bubble cap 2 and the central tube 3 by gas phase on the distributor central tube 3 inside and outside differential pressure effect distribution tray, is mixed together and enters central tube 3 tops with gas phase; Enter bubble cap 2 top gas-liquid mixture fluids impacts and go up the generation cyclonic action at spinning disk (maintaining static), the impact of rotary fluid phase factor centrifugal action and gas phase is crushed into drop, during to central tube 3 outlet because of the sudden enlargement of aisle spare, the gas-liquid two-phase mixed flow is taper and sprays downwards, thereby realizes the gas-liquid distribution.

The suction vortex type gas-liquid distributor of the utility model design compared with prior art has following characteristics:

1, distribution is more even, and its distribution curve peak value only is the 1/4-2/5 of prior art;

2, range of distribution is big, and its material range of distribution is the 120%-150% of prior art;

3, pressure drop and operating flexibility and prior art are suitable.

Claims

1, a kind of suction cyclone-type gas-liquid allotter, it is characterized in that this distributor is to be made of bubble cap (2), central tube (3), cyclone structure (1) and flanged plate (4), wherein bubble cap (2) is the cylinder of the equal cloth seam in bottom (5), cyclone structure (1) is by in the central tube (3) of bolting in bubble cap (2), central tube (3) is by journal stirrup (6) and be bolted on bubble cap (2) top inner wall central tube (3) and flanged plate (4) welding.

2,, it is characterized in that described bubble cap (2) top diameter is less than or equal to its base diameter according to the distributor of claim 1.

3, according to the distributor of claim 1, what it is characterized in that bar seam (5) that the bubble cap bottom evenly is provided with is shaped as quadrangle or triangle, and the number of bar seam is 4-8.

4, according to the distributor of claim 3, it is characterized in that described quadrangle is a rectangle, triangle is an isosceles triangle.

5, according to the distributor of claim 1, it is characterized in that described central tube is up-small and down-big taper flared tube or equal diameter pipe, central tube top, bottom are all uncovered.

6, according to the distributor of claim 1, it is characterized in that described cyclone structure is made up of 4-6 spinning disk, be placed on central tube (3) top.