CN2134219Y

CN2134219Y - Gas-liquid contactor

Info

Publication number: CN2134219Y
Application number: CN 92232700
Authority: CN
Inventors: 刘金成; 张立军; 聂锡田; 郭彦书
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-08
Filing date: 1992-09-08
Publication date: 1993-05-26
Anticipated expiration: 2002-09-08

Abstract

The utility model relates to a device for heat transfer of distillers, absorbing units, etc. by gas-liquid contact mass transfer in chemical industry, which comprises a top cover, a lateral wall and a horizontal tower tray, wherein, an ascension hole on the horizontal tower tray presents an upwards contracting shape, so that the ascension hole forms a nozzle hole form. Compared with the existing device, the utility model can reduce resistance by 1-11.5 times, the resistance of the whole tower is reduced by 40%, the internal and external static pressure difference of the device is increased, the liquid gas ratio of a mixture is enhanced, and the heat transfer effect of mass transfer is improved.

Description

Gas-liquid contactor

The utility model relates to the device that passes through gas-liquid contact mass transfer, heat transfer of distilling apparatus, absorption plant etc. in the chemical industry.

Day, special public clear 46-31321 disclosed a kind of gas-liquid contact apparatus, this device is installed in bubble column or the sieve-plate tower, includes top cover, sidewall and horizontal column plate, between sidewall and the horizontal column plate slit is arranged, have a plurality of holes on the sidewall, have air rising hole on the horizontal column plate.When the hot gas at the bottom of the tower rises, through the air rising hole on the column plate air-flow being produced shrinks, pressure can then partly be converted into kinetic energy, static pressure is reduced, liquid leans on the inside and outside differential static pressure of gas-liquid contact apparatus in the slit is pressed into device on the plate, contact the formation gas-liquid mixture with gas, thereby reach the purpose of mass transfer, heat transfer.Gas-liquid mixture subsequently upwards through top cover reflection back by the ejection of the hole on the sidewall, gas rises to the upper strata column plate at this moment, liquid prolongs sidewall and falls back on this layer column plate.Because existing air rising hole is common straight flange plate well, sudden contraction when gas is flowed through this hole enlarge then, so the resistance of air rising hole is very big, causes more energy loss.In addition, because the sudden contraction and the amplification of air-flow, make air rising hole to rise bore edges big to the disturbance of air-flow, can not form well " vena contracta " (gas speed highest point), it is insufficient to make pressure can be converted into kinetic energy, cause the inside and outside differential static pressure of mass transfer unit little, the amount of liquid that is pressed into participation gas-liquid contact in the device is little, and the effect of mass transfer, heat transfer is affected.

The purpose of this utility model just provides a kind of improved gas-liquid contact apparatus, to overcome above-mentioned shortcoming, cuts down the consumption of energy, and improves the effect of mass-and heat-transfer.

The utility model is achieved in that on the basis of existing gas-liquid contact apparatus, the hole wall of the air rising hole on the horizontal column plate made presented contraction-likely, makes air rising hole become the nozzle bore form.Make the out-of-date contraction gradually of air communication, reach the purpose that reduces resistance, improves gas-liquid contact effect.

Below in conjunction with description of drawings embodiment.

Fig. 1 is the part sectioned view of vapour-liquid contacting column, and wherein 1 is the tower wall, and 2 is horizontal column plate, and 3 is air rising hole, and 9 is downflow weir, and 10 is downspout, and 11 is gas-liquid contact apparatus.

Fig. 2 is that the A-A of Fig. 1 is to cutaway view.One group of gas-liquid contact apparatus is arranged on every layer of column plate.

Fig. 3 is a structural representation of the present utility model.

Fig. 4, Fig. 5, Fig. 6 are the partial structurtes figure of three kinds of embodiment.

As shown in Figure 3, top cover 4 of this device and sidewall 6 constitute the case shape, and the liquid level of sidewall 6 has many apertures 5 with the upper part, leaves slit 7 between sidewall 6 bottoms and the horizontal column plate 2.The gas that is risen by lower floor's column plate shrinks gradually through nozzle-type air rising hole 3, reaches the minimizing resistance, reduces energy consumption, improves the purpose of mass transfer effect.Air-flow reaches maximum in a certain position, column plate top gas speed behind the nozzle-type air rising hole, form " vena contracta ".Gas speed maximum and static pressure is minimum herein, liquid rely on that gas-liquid contact apparatus place portion and inner differential static pressure press-in device are interior to contact mixing, mass-and heat-transfer with gas.Gas drives the top cover 4 reflection backs of passing through on the liquid and sprays with level or downward-sloping direction by the aperture 5 on the sidewall 6.Gas rises to the upper strata column plate, and liquid forms bigger drop and falls back to this layer column plate in sidewall 6 outsides.Downflow weir 9 among Fig. 1 is kept the liquid layer on the column plate, and the downspout 10 that links to each other with downflow weir is guided liquid into the lower floor column plate from this layer column plate.

Fig. 4 to Fig. 6 provides three embodiment, and the air rising hole 3 among Fig. 4 on the horizontal column plate 2 is the bell mouth shape that protrudes to the column plate bottom, and this form is suitable for column plate and requires tighter situation than the height of liquid layer on thin and the column plate.The hypotenuse shape hole of air rising hole 3 for leaving on column plate among Fig. 5 on the horizontal column plate 2, this form is suitable for the thicker situation of column plate.The air rising hole 3 of horizontal column plate 2 is the last contraction-like hole of protruding to column plate top among Fig. 6, the less relatively situation of liquid-gas ratio during this form is suitable for operating.

The utility model is owing to adopt the nozzle type air rising hole, compare with flat-plate direct wall type air rising hole, air-flow flows into the resistance coefficient of air rising hole and is down to 0.04-0.25 by 0.5, resistance can reduce 1-11.5 doubly, full tower resistance can reduce by 40%, thereby capable of reducing energy consumption, and because the outside of contact device and the increase of inside static pressure difference, improved the inner liquid-gas ratio of device, the mass-and heat-transfer successful improves.

Claims

1, a kind of gas-liquid contact apparatus that is applicable in the chemical industry distillation or absorption plant, include top cover 4, sidewall 6 and horizontal column plate 2, between sidewall 6 and the horizontal column plate 2 slit 7 is arranged, have a plurality of holes 5 on the sidewall 6, have air rising hole 3 on the horizontal column plate 2, the hole wall that it is characterized in that the air rising hole 3 on the horizontal column plate is presented contraction-like, makes air rising hole become the nozzle bore form.

2, gas-liquid contact apparatus according to claim 1 is characterized in that the bell mouth shape of air rising hole 3 for protruding to the column plate bottom on the horizontal column plate 2.

3, gas-liquid contact apparatus according to claim 1 is characterized in that the hypotenuse shape hole of air rising hole 3 for leaving on the horizontal column plate 2 on column plate.

4, gas-liquid contact apparatus according to claim 1 is characterized in that the last contraction-like hole of air rising hole 3 for protruding to column plate top on the horizontal column plate 2.