JPH057754A - Gas-liquid contact apparatus - Google Patents

Abstract

PURPOSE:To easily take the balance of the amounts of air and a liquid and to efficiently bring air and liquid into contact with each other. CONSTITUTION:A rotor 12 is received in a casing 11 having a horizontal cylindrical body wall 21 extending in the horizontal direction thereof. The rotor 12 consists of the horizontal rotary shaft 31 arranged in coaxial relation to the body wall 21 and a plurality of the perforated vertical discs 32 attached to the rotary shaft 31 so as to provide intervals therebetween in the horizontal direction of the rotary shaft 31. Air is transferred while successively passed through the discs 32 from the disc 32 of the foremost end to the disc 32 of the rearmost end. A liquid is supplied in the casing 11 from the front end part thereof so as to form a liquid sump 13 for immersing the leading end parts of the discs 32 to be discharged from the rear end part of the casing 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for purifying air containing a relatively low concentration of NOx, such as ventilation air for road tunnels, in order to enhance the efficiency of denitration of air by zeolite, to cool and dehumidify the air. The present invention relates to a gas-liquid contact device used for

[0002]

2. Description of the Related Art As a conventional device of this type, as shown in FIG. 6, a filler 62 is arranged in the middle of the height of a tower-shaped casing 61, and a hot air inlet 63 is provided near the lower end of the peripheral wall of the casing 61.
However, a cold air outlet 64 is provided in the central portion of the top wall of the casing 61, a cold water inlet 65 is provided near the upper end of the peripheral wall of the casing 61, and the cold water inlet 65 is connected to the base end of a pipe 67 with a tip water spray nozzle 66. It is known that a hot water outlet 68 is provided at the center of the bottom wall of the casing 61, and cold water and hot air are brought into contact with each other to obtain hot water and cold air.

Further, as another conventional apparatus, as shown in FIG. 7, two packings 72 are arranged in upper and lower two stages in a casing 71, and an intermediate tray 73 is arranged between the two packings 72.
A warm air inlet 74 is provided near the lower end of the peripheral wall of the casing 71, and a cold air outlet 75 is provided at the center of the top wall of the casing 71, and the upper filling material 72 extends upward from the tray 73 and has a tip water spray nozzle 76 as the upper filling material. 72 is provided with an upper circulation pipe 77 facing from above, and the lower filling 72 is provided with a circulation pipe 77 extending upward from below to make the tip water spray nozzle 76 face the lower filling 72 from above. Known are known.

[0004]

In the device shown in FIG. 6,
It is desirable to keep the cold air temperature as low as possible and the hot water temperature as high as possible (ideally, the cold air temperature and the cold water temperature are equal,
Hot water temperature and hot air temperature are equal).

In principle, if the tower height L is sufficient, the above ideal is achieved. However, in this case, it is necessary to reduce the amount of water sprayed to the amount of air very much due to the air-water balance. If the tower diameter is too large for the amount of water sprayed,
Cold water does not flow evenly into the tower, gas-liquid contact becomes insufficient, and efficient heat exchange cannot be performed. On the contrary, if the tower diameter is too small with respect to the air flow rate, the pressure loss of the air flow is high, the air flow velocity is high, and the liquid is likely to be blown up (flatting phenomenon).

Although it depends on the operating conditions, it is difficult to design a device in which the air-water is balanced, and in reality, a design focusing on one of the cold air temperature and the hot water temperature is made.

In the apparatus shown in FIG. 7, air-water are balanced by sufficiently circulating the liquid for each packing 72 in each stage, but the problem is that the pressure loss at the intermediate tray 73 is large. There is. Further, since the liquid is completely mixed in each stage, there is a problem that the desired performance cannot be obtained unless the number of stages is reduced.

An object of the present invention is to provide a gas-liquid contact device that solves the above problems.

[0009]

A gas-liquid contact device according to the present invention includes a casing having a horizontal cylindrical barrel wall extending in the front-rear direction, a horizontal rotary shaft arranged concentrically with the axial center of the barrel wall, and A rotor consisting of a plurality of vertical discs made of porous material that are mounted at intervals in the front-rear direction, and gas transfer means that transfers gas while sequentially passing each disc from the frontmost disc to the rearmost disc, A liquid transfer means is provided for supplying a liquid to the front end of the casing and discharging the liquid from the rear end of the casing so as to form a liquid reservoir in which the front end of each disk is immersed in the casing.

[0010]

In the gas-liquid contact device according to the present invention, a casing having a horizontal cylindrical barrel wall extending in the front-rear direction, a horizontal rotary shaft arranged concentrically with the axial center of the barrel wall, and a space in the front-rear direction provided therebetween. Since there is provided a rotor composed of a plurality of vertical discs made of a porous body attached in advance, even if a sufficient amount of liquid is immersed in each disc, the above-mentioned flooding phenomenon does not occur, and the conventional device does not Since there is no such thing as an intermediate tray, the pressure loss is small.

Further, the apparatus is provided with gas transfer means for transferring gas while sequentially passing each disk from the foremost disk to the last disk, and a liquid reservoir for immersing the tip of each disk in the casing. As the liquid is supplied to the front end of the casing so as to form the liquid and the liquid transfer means for discharging the liquid from the rear end of the casing is provided, the gas flows in the casing from the front to the rear, and the tip of each disc The liquid flows from the back to the front in the liquid reservoir while being immersed, and the flows of the gas and the liquid are countercurrent.

[0012]

Embodiments of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the gas-liquid contact device comprises a casing 11 and a rotor 12 housed in the casing 11. A liquid reservoir 13 is formed in the casing 11, and the tip portion including the outer peripheral surface of the rotor 12 is immersed in the liquid reservoir 13.

The casing 11 is composed of a horizontal cylindrical body wall 21 extending in the front-rear direction, and front and rear end walls 22 and 23 that close the front and rear end openings thereof, respectively. A plurality of vertical partition plates 24 are provided at a lower end of the inner surface of the body wall 21 at predetermined intervals. A warm air inlet 25 is provided near the upper end of the front end wall 22, and a cold air outlet 26 is provided near the upper end of the rear end wall 23. A cold water inlet 27 is provided at the front end of the body wall 21 near the cold air outlet 26, and a hot water outlet 28 is provided at the lower end of the front end wall 22.

The rotor 12 has a horizontal rotary shaft 31 arranged concentrically with the axial center of the body wall 21, and a plurality of partition plates 24 adjacent to each other, so that the rotor 12 is positioned in the longitudinal direction of the rotary shaft 31. It consists of a plurality of vertical discs 32 mounted at intervals.
The rotating shaft 31 is supported by bearings 33 at appropriate positions in its length direction.

As shown in detail in FIGS. 2 and 3, the disc 32 is provided radially on the mounting boss 34 so as to make a pair with the mounting boss 34 fitted on the rotary shaft 31 and face each other in the front-rear direction. Between the paired arms 35 and the paired arms 35, and the ring-shaped water retention sponge 36 that is stopped at the tip of the paired arms 35 so as to be sandwiched between the paired arms 35 and the paired arms 35. It is composed of a plurality of annular corrugated wire nets 37 which are arranged between the mounting boss 34 and the water retaining sponge 36 so as to be overlapped and overlapped. The number of wire nets 37 is preferably 3 or more. The size of the mesh of the wire net 37 is preferably 10 mm or less, and most preferably 3 mm or less.

Warm air is introduced into the casing 11 through the warm air inlet 25, and cold air is led out through the cold air outlet 26, whereby an air flow from the front to the rear is generated in the casing 11.

On the other hand, cold water is introduced into the casing 11 through the cold water inlet 27, and hot water commensurate with the amount of cold water supplied is discharged from the casing 11 through the hot water outlet 28. As a result, a liquid flow from the rear to the front is generated in the liquid reservoir 13.

When the rotor 12 is rotated in the state where the air flow and the liquid flow are generated as described above, the tip end of the rotor 12 is sequentially dipped in the liquid reservoir 13, so that the rotor 12 is cooled with hot water (or hot water depending on the place). ) Is held and cold water flows down along the rotor 12 as the rotor 12 rotates,
The hot air comes into contact with the hot air and heat is exchanged, and the hot air becomes cold air.

4 and 5 show a modification of the disk.

The disk 42 according to this modification includes a mounting boss 44 fitted on the rotary shaft 31, a plurality of T-shaped arms 45 radially provided on the mounting boss 44, and a base of each arm 45. A pair of L-shaped brackets 46 and a plurality of arms 45
Inner / outer connecting member being passed between the adjacent ones of the same
47, 48, a plurality of corrugated wire nets 52, which are cantilevered between a front end of each arm 45 and a front end of the bracket 46 via a pair of small water retention sponges 51, and each arm 45. It is composed of a plurality of large water retention sponges 53 attached to the tip of the.

In the disk of this modification, the main frame portion of the disk 42 is formed by the combination of the T-shaped arm 45 and the bracket 46, so that a large-diameter disk can be easily formed.

[0023]

According to the present invention, even if a sufficient amount of liquid is dipped into each disk, the above-mentioned flooding phenomenon does not occur, and there is no intermediate tray of the conventional device, so that the pressure loss is reduced. Since it is small, it is easy to balance the amount of liquid flowing down along each disc with the amount of gas passing through each disc.

Further, the gas flows from the front to the rear in the casing, and the liquid flows from the rear to the front in the liquid reservoir while immersing the tip of each disk, and the flow of the gas and the liquid becomes a countercurrent. The liquid can be contacted efficiently.

[Brief description of drawings]

1 is a vertical longitudinal sectional view of a device according to the present invention.

FIG. 2 is a partially enlarged front view of a disk.

FIG. 3 is a partially enlarged sectional view of a disk.

FIG. 4 is a front view corresponding to FIG. 2 showing a modified example of the disk.

FIG. 5 is a cross-sectional view corresponding to FIG. 3 showing the modified example.

FIG. 6 is a vertical vertical sectional view of a conventional device.

FIG. 7 is a vertical longitudinal sectional view of another conventional device.

[Explanation of symbols]

 11 Casing 12 Rotor 13 Liquid reservoir 21 Casing body wall 31 Rotating shaft 32 Disc 42 Disc

Continuation of the front page (51) Int.Cl. ⁵ Identification code Reference number within the agency FI Technical display location F28C 1/00 7153-3L F28F 25/08 9141-3L // B01D 53/34 129 A 6953-4D

Claims (1)

Claim: What is claimed is: 1. A casing 11 having a horizontal cylindrical body wall 21 extending in the front-rear direction, a horizontal rotary shaft 31 arranged concentrically with the axis of the body wall 21, and a front-rear direction thereof. A rotor 12 composed of a plurality of vertical discs 32 made of a porous body mounted at intervals, and a gas transfer means for transferring gas while sequentially passing each disc 32 from the frontmost disc 32 to the rearmost disc 32. And a liquid reservoir for immersing the tip of each disk 32 in the casing 11.
A gas-liquid contactor comprising liquid transfer means for supplying liquid from the front end of the casing 11 so as to form 13 and discharging the liquid from the rear end of the casing 11.