CN201578972U

CN201578972U - Structure of adsorber in pressure swing adsorption air separation equipment

Info

Publication number: CN201578972U
Application number: CN2009203515979U
Authority: CN
Inventors: 贺明星; 陈亮; 周志军; 陈志华; 黄光玉; 刘海龙
Original assignee: SHANGHAI RICH GAS EQUIPMENT CO Ltd
Current assignee: SHANGHAI TONGXUE INDUSTRIAL CO., LTD.
Priority date: 2009-12-30
Filing date: 2009-12-30
Publication date: 2010-09-15
Anticipated expiration: 2019-12-30

Abstract

The utility model relates to the structure of an adsorber in pressure swing adsorption air separation equipment, which comprises a body, a molecular sieve, a cyclone plate and an arch-shaped sieve plate, wherein the molecular sieve is arranged inside the body; the cyclone plate is arranged at an air inlet at the bottom end of the body; and the arch-shaped sieve plate is arranged between the air inlet and the molecular sieve. The structure has the following benefits: the speed and the direction of air flow can be effectively changed; when the air flow passes through the cyclone plate, both the direction and the speed of the air flow are changed under the action of the resistance of the blades of the cyclone plate; the movement manner of the air flow reduces the appearance of dead space in a tower, thus improving the utilization rate of the molecular sieve; simultaneously, the speed and the direction of the air flow are changed, thus avoiding the impact of high-pressure air flow to the molecular sieve, stopping the boiling of the molecular sieve in the adsorber, reducing the pulverization of the molecular sieve, and being beneficial to prolonging the service life of the molecular sieve; and the structure improves the adsorption performance of the molecular sieve, reduces energy consumption, and prolongs the service life of the molecular sieve.

Description

Adsorber structure in the pressure swing adsorption air separation plant

Technical field

The utility model relates to a kind of pressure swing adsorption air separation plant, relates in particular to adsorber structure in a kind of pressure swing adsorption air separation plant.

Background technology

Pressure swing adsorption air separation plant is a kind of equipment of isolating needed gas from air, is widely used in industries such as system nitrogen, system oxygen.

With making nitrogen by pressure swing adsorption gas is example, comprises that mainly air purifier, air reservoir, gas separate, product gas surge tank; It is formed schematic diagram and sees Fig. 1.

The effect of air purifier is dust, water and the oil of removing in the compressed air, for oxygen nitrogen separation assembly provides clean raw material; The effect of air reservoir is that assurance system usefulness gas is steady, prevents the too fast air purification effect that influences of moment air-flow velocity, improves the compressed air quality that enters absorber, helps prolonging the life-span of molecular sieve; It is the core component of equipment that gas separates, and it is a difference of utilizing the adsorption capacity of different components on adsorbent in the gas medium, and nitrogen and oxygen separation are come; Product gas surge tank its mainly to act on be to make nitrogen pressure and flow and purity steady.

Transformation absorption is a kind of physical change, utilizes the difference of molecular sieve to the adsorption capacity of nitrogen oxygen, and nitrogen and oxygen separation are opened.Generally be that air enters in the absorber, make molecular sieve adsorption oxygen under certain pressure, most nitrogen overflows by the space of molecular sieve, thereby collects the nitrogen that obtains corresponding purity, and desorb makes regenerating molecular sieve recycling when step-down.

As seen from Figure 2: existing adsorber structure is that air-flow 1 enters at the bottom of by tower, enters in the adsorption tower 3 through flat sieve plate 2; Among the figure: molecular sieve 4.Though such structure is simple, there are two problems: the first, leave over a large amount of " dead space "; Because air enters in the bottom cavity, the motion mode of air-flow be rapidly, single direction; So-called dead space promptly is that adsorbate can't reach or promptly enables to reach the space that also can't flow smoothly.As seen " dead space " can not be air-breathing, also just can not obtain utilizing; " dead space " is big more, and the utilization rate of molecular sieve is more little, causes waste more; The second, cause molecular sieve surface efflorescence easily; Because in variable-pressure adsorption equipment, because carbon molecular sieve is the object of particle, in the filling process, that can not load is definitely solid; Air-flow in the adsorption tower course of work to absorber in molecular sieve periodically impact, molecular sieve sinks loosening, thereby can produce the boiling effect; The boiling effect will inevitably cause molecular sieve and molecular sieve to collide mutually, and molecular sieve and container inner wall collide mutually, and the molecular sieve surface texture is peeled off or efflorescence; The gettering ability of molecular sieve descends, and performance reduces.

Summary of the invention

The utility model technical issues that need to address have provided adsorber structure in a kind of pressure swing adsorption air separation plant, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model comprises: body; In described body, settle molecular sieve; Air inlet place in the bottom of body also settles a cyclone plate; Between air inlet place and molecular sieve, also settle an arch sieve plate.

Compared with prior art, the beneficial effects of the utility model are: the speed and the direction that can change air-flow effectively; When air-flow process cyclone plate, all change in cyclone plate blade drag effect downstream direction and speed; This motion mode of air-flow has reduced the appearance of dead space in the tower, improves the utilization rate of molecular sieve; Change air velocity and direction simultaneously, avoid the impact of high pressure draught, checked molecular sieve and in absorber, seethed with excitement, reduce the efflorescence of molecular sieve, help prolonging the service life of molecular sieve molecular sieve; Improve the absorption property of molecular sieve, cut down the consumption of energy, prolonged the service life of molecular sieve.

Description of drawings

Fig. 1 is a pressure swing adsorption air separation plant principle schematic in the prior art;

Fig. 2 is an adsorber structure schematic diagram among Fig. 1;

Fig. 3 is the utility model structural representation;

Fig. 4 A is a cyclone plate structural representation among Fig. 3;

Fig. 4 B is the vertical view of Fig. 4 A.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described in further detail:

By Fig. 3, Fig. 4 A, Fig. 4 B as seen: the utility model comprises: body 3; In described body 3, settle molecular sieve 4; Air inlet place 1 in the bottom of body also settles a cyclone plate 10; Between air inlet place 1 and molecular sieve 4, also settle an arch sieve plate 20;

Described cyclone plate 10 by urceolus 101 and at least a slice flabellum 102 form; Urceolus 101 is bobbins that the cross section of one section sealing becomes the L type; Flabellum 102 welds with the inwall of urceolus 101.

Urceolus is the bobbin of the cross section one-tenth L type of one section sealing in the utility model, can be stuck between two flanges.Flabellum is similar with common fan leaf, and the angle of flabellum and urceolus is determined that by air quantity and wind speed the quantity of flabellum is determined by the size of cyclone plate.

The utility model is by movement velocity and the direction of motion of control air in absorber inside, to reduce the impact of air to absorber inside adsorbent.

For this reason the utility model in absorber air inlet specialized designs whirlwind disperser and sieve plate.

Cyclone plate is contained in absorber air inlet place, its effect be the very big air-flow of flow velocity is disperse, spiral entering in the absorber.Enter adsorption tower with traditional approach and compare, air-flow to tower at the bottom of the impulsive force of molecular sieve obviously reduce, adsorption bed play stable more, molecular sieve reduces, and effectively protects molecular sieve.Simultaneously the dispersing of air-flow, the spiral absorber that enters make air-flow can reach the unapproachable space of general fashion, have also promptly reduced " dead space ".In absorber inside the arch sieve plate is housed.A bigger space is arranged between arch sieve plate and the cyclone plate, and gas obtains buffering in this space, makes air-flow more steady through the speed of molecular sieve, and absorption property has raising.The air that enters tower inside sees through arc screening plate and exhales, and also can fill up absorber inside " dead space ", reaches the purpose that maximum is utilized molecular sieve.

Claims

1. adsorber structure in the pressure swing adsorption air separation plant comprises: body; In described body, settle molecular sieve; It is characterized in that: the air inlet place in the bottom of body also settles a cyclone plate; Between air inlet place and molecular sieve, also settle an arch sieve plate.

2. adsorber structure in the pressure swing adsorption air separation plant according to claim 1 is characterized in that: described cyclone plate by urceolus and at least a slice flabellum form; Urceolus is the bobbin that the cross section of one section sealing becomes the L type; The inwall welding of flabellum and urceolus.