JPS63107727A - Gas cleaning apparatus - Google Patents

Abstract

PURPOSE:To surely deodorize malodorous gas by a single apparatus, by dividing the interior of a casing of which the bottom part is set to a liquid sump part into a wet scrubbing chamber provided with a venturi scrubber and a dry adsorbing chamber equipped with a specific adsorbing filter material by a partition wall having an eliminator mounted to the lower part thereof. CONSTITUTION:The malodorous gas sent in from an inlet 6 passes through the gaps between the rod-shaped bodies 11 arranged in the vicinity of the venturi scrubber 13 in a wet scrubbing chamber 7 at a high speed. At this time, the absorbing solution injected from an upper spray nozzle is formed into a large amount of liquid droplets and the malodorous components in the malodorous gas are absorbed by said liquid droplets. Subsequently, the liquid droplets pass through an eliminator 4 while impinging against the zigzag wall surface thereof and fall to a lower liquid sump part 2. Further, the gas containing a very small amount of malodorous components passing through the eliminator 4 is introduced into a dry adsorbing chamber 9 and passes through an adsorbing filter material 15 to adsorb and collect the malodorous components. The adsorbing filter material 15 is formed by folding a cloth like (paper like) absorbing material into a cylindrical shape having a chrysanthemum like cross-section and has a large adsorbing area.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a gas cleaning device used for absorbing malodorous components in malodorous gas.

(Prior technology) Generally, malodorous gases can be perceived as an odor even at extremely dilute concentrations, so the usual pollution countermeasure is to remove most of the malodorous components using a wet cleaning device, and then dry cleaning in a separate dry adsorption device. It was common practice to adsorb the remaining malodorous components with an adsorbent. However, providing the wet cleaning device and the dry adsorption device separately in this way has the drawback of increasing equipment costs. In addition, in cases where foul-smelling gas is generated intermittently, the amount of adsorbent required may be small based on the adsorption and retention capacity, but in order to prevent short circuits in the gas flow, the thickness of the packed bed must be must be made thicker,
If the thickness of the packed bed is increased while the amount of adsorbent is kept constant, the gas passage cross-sectional area will become smaller and the pressure loss will increase. There was also the drawback that the amount of adsorbent needed to be filled was several tens of times that of the amount of adsorbent commensurate with the adsorption and retention capacity.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, and can absorb malodorous components in malodorous gas with a single unit. It was completed with the aim of creating a gas cleaning device that does not require the use of gas.

(Means for Solving the Problems) The present invention provides a wet cleaning chamber equipped with a Venturi scrubber and a cloth-like or It is characterized by being divided into a dry adsorption chamber equipped with an adsorption filter material made of a paper-like adsorbent folded into a cylindrical shape with a chrysanthemum-like cross section.

(Example) Next, the present invention will be explained in detail with reference to the illustrated example.
(1) is a casing with a liquid reservoir (2) at the bottom;
A malodorous component absorbing liquid is supplied to the liquid reservoir (2) from an injection valve (3) up to a predetermined liquid level. The inside of this casing (1) is divided into a wet cleaning chamber (7) on the inlet (6) side and a dry adsorption chamber (9) on the outlet (8) side by a partition wall (5) with an eliminator (4) at the bottom. has been done. As shown in the figure, the eliminator (4) has baffle plates with a zigzag cross section arranged in parallel to form a curved flow path, and is slightly inclined in the front-rear direction of the paper. The lowest part of the eliminator (4) is a hanging part Ql and is immersed below the liquid level of the liquid reservoir (2).

In the wet cleaning chamber (7), for example, a plurality of rod-shaped bodies (11) having circular, elliptical or polygonal cross sections are arranged in parallel and close to each other, and the gaps between the rod-shaped bodies (11) are used as venturi. A venturi scrubber (13) with a spray nozzle (12) arranged above is provided. The absorption liquid in the liquid reservoir (2) pumped up by the circulation pump (14) is supplied to the spray nozzle (12) and is sprayed toward the rod-shaped body (11). The Venturi scrubber (13) made of such a rod-shaped body (11) generates a large amount of droplets, and when malodorous gas is passed through it, it can efficiently absorb malodorous components. Moreover, it has the advantage that its characteristics can be freely changed by changing the type and gap of the rod-shaped body (11), but it goes without saying that other general types of Venturi scrubbers (13) may also be used. .

On the other hand, in the dry adsorption chamber (9), a cartridge-shaped adsorption filter material (15) made by folding a cloth-like or paper-like adsorbent material into a cylindrical shape with a chrysanthemum-like cross section is provided hanging from the partition plate (16). . The adsorbent used for this adsorption filter medium (15) is one made by adhering carbon fibers to wool or felt, or adhering carbon fiber cloth, but is not necessarily limited thereto.

In addition, (17) is attached to each adsorption filter medium (
15) for backwashing installed opposite to the
18) is a nozzle pipe for blowing air for backwashing into each pentier (17), and (19) is a fan for sucking clean gas.

(Function) With this structure, if the malodorous gas is sent from the inlet (6), the malodorous gas will be removed from the venturi scrubbers (13) installed in the wet cleaning chamber (7). The gap between the rod-shaped body (11) is 50 to 100g + 7
It passes at a high speed of seconds, and at this time, the absorption liquid sprayed from the spray nozzle (12) above it becomes a large number of droplets, and the malodorous components are absorbed by these droplets. When the droplets generated here next pass through the eliminator (4), they collide with the zigzag wall surface due to inertia and are collected.
It falls into the liquid reservoir (2) at the bottom. Also Eliminator (4
) The gas containing trace amounts of malodorous components is transferred to a dry adsorption chamber (
9), the malodorous components in this gas are adsorbed and collected while passing through the adsorption filter medium (15). Adsorption filter medium (1
5) is a cloth-like or paper-like adsorbent folded into a cylindrical shape with a chrysanthemum-like cross section, which has a large adsorption area, and there is no risk of gas short-circuiting, so it efficiently adsorbs and removes malodorous components. The passing gas becomes clean gas and is discharged from the outlet (8).

If the malodorous gas contains dust, the dust will gradually accumulate on the surface of the adsorption filter medium (15) during use, increasing the pressure loss. 17) from the nozzle pipe (18) to blow off the dust.

Furthermore, in the second embodiment shown in FIG. 2, in addition to the structure of the first embodiment, the adsorption filter medium (
15) A shallow box-shaped precoat agent storage box (20) is provided on the bottom surface, and an adsorbent powder (21) such as activated carbon powder or zeolite powder is stored inside the box, and a downward nozzle is provided on the top surface. (22) is provided. In the apparatus of this second embodiment, when the malodorous gas components become concentrated or generated in large quantities and the adsorption capacity of the adsorption filter medium (15) is expected to be saturated in a short time, the solenoid valve (23) is used.
) can be opened to blow up the adsorbent powder (21) from the nozzle (22) and pre-coat the adsorbent powder (21) onto the surface of the adsorption filter medium (15). This makes it possible to extend the service life of the adsorption filter medium (15), and since the precoat can be removed by backwashing and precoated again, the adsorption filter medium (15) can be used for a long period of time without having to be replaced. It becomes possible. If the pre-coated adsorbent powder (21) is replaced with zeolite or the like, malodorous components that cannot be removed by activated carbon can also be adsorbed, making it possible to handle multi-component gases.

(Effects of the Invention) As is clear from the above description, the present invention is capable of deodorizing foul-smelling gas with a single device, and also converts a cloth-like or paper-like adsorbent into a cylindrical shape with a chrysanthemum-like cross section. By using a folded adsorption filter medium, malodorous gas components can be reliably adsorbed without using an unnecessarily large amount of adsorbent. Therefore, the present invention has extremely great practical value as it eliminates the problems of conventional gas purifying devices of this type.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of the present invention, and FIG. 2 is a sectional view showing a second embodiment. (1): Casing, (2): Liquid reservoir, (4): Eliminator, (5): Partition, (7): Wet cleaning chamber, (9):
Dry adsorption chamber, (13) + venturi scrubber.

Claims (1)

[Claims] The inside of the casing (1) with the bottom as the liquid reservoir (2),
A bulkhead (5) with a baffle plate-like eliminator (4) at the bottom.
) and a dry adsorption chamber (9) equipped with a wet cleaning chamber (7) equipped with a Venturi scrubber (13) and an adsorption filter material (15) made of cloth or paper-like absorbent material folded into a cylindrical shape with a chrysanthemum cross section. A gas purifying device characterized by being divided into.