CN201299984Y - High-speed three-dimensional mass-transfer tower plate with super-large air flow - Google Patents

Abstract

A high-speed three-dimensional mass transfer tray with super large capacity. There are multiple caps installed on the upper part of the tray. A separation cover is arranged outside the cap. There is a downcomer at the inlet end and an overflow weir at the outlet end; The opening form is a swirl shutter, and the opening ratio is greater than that of the tray.

Description

A high-speed three-dimensional mass transfer tray with super large capacity

1. Technical field

The utility model relates to a high-speed three-dimensional mass-transfer tray with super large capacity, which belongs to the field of chemical machinery.

2. Background technology

In petrochemical, petroleum refining, chemical industry, light industry, environmental protection, medicine and atomic energy and other industrial sectors, trays and packing are widely used in chemical unit processes such as distillation, absorption, extraction, absorption, washing and cooling. Packing has the advantages of high separation efficiency, small pressure drop, and large processing capacity, but the cost is high, the operation flexibility is small, and the requirements for supporting column internals are high; the tray has high operation flexibility, anti-clogging, low cost, and relatively high separation efficiency , but the pressure drop will be larger and the processing capacity will be lower. Under the conventional gas-liquid ratio, the trays and packing can meet the needs of industrial applications, but for some special working conditions, some special structural internals are needed to meet the production needs, such as high liquid-gas ratio (stripping section), ultra-low liquid-gas ratio (such as absorption tower, scrubbing and defogging tower), high liquid residence time (such as reactive distillation tower, biochemical reaction tower). For flue gas desulfurization, ethylene quenching tower, coking fractionation tower, syngas liquid desulfurization and decarbonization tower and other working conditions with super large capacity, on the one hand, the tower diameter is too large to cause a sharp increase in equipment investment; on the other hand, under a reasonable liquid-gas ratio If the liquid flow intensity is too low, it is difficult to arrange the plate surface of the tray, and it is forced to increase the liquid flow intensity, resulting in increased energy consumption for separation. In addition, for the existing tower internals, the operating gas velocity of the empty tower is only about 1m/s, and the space in the tower is insufficiently utilized, making it difficult to expand and transform the processing capacity by doubling.

3. Contents of the invention

The purpose of this utility model is to provide a high-speed three-dimensional mass transfer tray with super large capacity, which is mainly composed of tray, cap, separation cover, downcomer, overflow weir, cap hole, center cylinder, air rise hole, etc. . The tray has a plurality of gas-lifting holes, a cap is installed on the upper part of the hole, a separation cover is arranged outside the cap, a downcomer is arranged at the inlet end, and an overflow weir is arranged at the outlet end. The air hole is in the form of a flat hole or a figure-eight shape, and the opening ratio accounts for 6% to 50% of the cross section of the tray. The gap between the cap (2) and the tray (1) is 3-10 mm or there are liquid inflow holes of the same area at the bottom of the cap; the gap between the cap and the separation cap is 10-50 mm; there is a cap on the top of the cap The hole is in the form of a swirl shutter, and the opening ratio is greater than that of the tray. The separation cover is a single-layer or double-layer drum.

The height of the overflow weir is 50-500mm higher, and the height of the downcomer is 200-600mm higher than the overflow weir.

4. Description of drawings

Accompanying drawing Figure 1 is a schematic diagram of the tray structure of the present invention, accompanying drawing 2 is a structural diagram of the inlet of the gas riser, accompanying drawing 3 is a schematic diagram of the structure of the cap hole, and accompanying drawing 4 is a schematic diagram of the structure of the separation cover.

The drawings of the accompanying drawings are set as follows:

1. Tray 2. Hood 3. Separation hood 4. Overflow weir 5. Downcomer 6. Center tube 7. Lift hole 8. Hood hole

The structural features of the utility model are described in detail below in conjunction with the accompanying drawings and embodiments.

5. Specific implementation

In the actual design and manufacture, the utility model is that the tray (1) has a plurality of air holes (7), the upper part of the hole is equipped with a cap (2), the cap (2) is provided with a separation cover (3), and the inlet There is a downcomer (5) at the end, and an overflow weir (4) is arranged at the outlet. The vent hole (7) is in the form of a flat hole or a figure-eight shape, and the opening ratio accounts for 6% to 50% of the section of the tray (1). The gap between the cap (2) and the tray (1) is 3-10 mm or the bottom of the cap has liquid inflow holes of the same area; the gap between the cap (2) and the separation cover (3) is 10-50 mm; (2) There is a cap hole (8) on the upper top, and the opening form is a swirl shutter, and the opening ratio is greater than or equal to the opening ratio of the tray (1), usually 2 to 3 times the opening ratio of the tray .

The separation cover (3) is a single-layer or double-layer rotary cylinder, and a central cylinder (6) is arranged on the top. The height of the overflow weir (4) is 50-500 mm, and the height of the downcomer (5) is 200-600 mm higher than that of the overflow weir (4).

(A) is a flat hole among the accompanying drawings 2, and (B) is a figure-eight hole.

Among the accompanying drawings 4, (A) is a single cylinder structure, and (B) is a double cylinder structure.

In actual operation, the liquid cross-flows through the tray (1), and the liquid enters the 2-20m/s gas lift that enters through the cap (2) and the air hole (7) from the gap or inflow hole at the bottom of the cap (2). , film pulling, crushing, stirring and mixing, and then swirled out from the cap hole (4), centrifuged in the separation cover (3), the gas flows out from the center tube (6) of the separation cover (3), and the liquid is separated along the The inner wall of the cover (3) flows back to the liquid layer downwards, realizing gas-liquid three-dimensional mass transfer at high gas velocity.

Claims (7)

1. the high speed combined trapezoid spray tray of a super large tolerance, mainly form by column plate, calotte, separation hood, downspout, downflow weir, calotte hole, central tube, air rising hole etc., technical characterictic is that column plate has a plurality of air rising holes, top, hole is equipped with calotte, the calotte outside is provided with separation hood, arrival end has downspout, and the port of export is provided with downflow weir.

2. according to the high speed combined trapezoid spray tray of a kind of super large tolerance that claim 1 provided, it is characterized in that the air rising hole form is flat hole or splayed, percent opening accounts for 6%～50% of column plate cross section.

3. according to the high speed combined trapezoid spray tray of a kind of super large tolerance that claim 1 provided, it is characterized in that calotte (2) and column plate (1) crack spacing are that 3～10mm or calotte bottom have liquid inflow port of the same area.

4. according to the high speed combined trapezoid spray tray of a kind of super large tolerance that claim 1 provided, it is characterized in that calotte and separation hood crack spacing are 10～50mm.

5. according to the high speed combined trapezoid spray tray of a kind of super large tolerance that claim 1 provided, it is characterized in that the calotte upper top has the calotte hole, open-cellular form is the eddy flow shutter, and percent opening is more than or equal to the percent opening of column plate.

6. according to the high speed combined trapezoid spray tray of a kind of super large tolerance that claim 1 provided, it is characterized in that separation hood is that individual layer or bilayer revolve tube.

7. according to the high speed combined trapezoid spray tray of a kind of super large tolerance that claim 1 provided, it is characterized in that the high 50～500mm of height of weir plate, downspout aspect ratio overflow height of weir 200～600mm.

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