JP2002045640A - Method and device for eliminating blue smog - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress dust such as blue smog generated in an asphalt manufacturing plant. SOLUTION: The method for eliminating the blue smog, or the like, comprises forcedly sucking oil smoke, or the like, generated in the plant into a blue smog elimination device by utilizing a negative pressure caused by a fan device provided at the rear of the blue smog elimination device, then separating the oil smoke, or the like, by the cyclone effect in the blue smog elimination device, simultaneously spraying a foamed liquid foamed by adding an air pressure to a mixed liquid of a foaming agent and a deodorant onto the oil smoke, or the like, being separated so as to collide and mix the foamed liquid with the oil smoke, or the like, and to cover the oil smoke, or the like, with the foam, separating the oil smoke, or the like, into a clear gas and a sludge material such as oil sludge, and discharging/exhausting them from the device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method and an apparatus for removing bluesmog generated in a factory and its odor.

[0002]

2. Description of the Related Art Conventionally, measures against bluesmog, which is a bluish smoke mixed with oil generated at an asphalt manufacturing plant, and its odor have been taken at a high facility cost, and even with equipment for eliminating bluesmog and odor. There is little expectation of the effect on the equipment, and at present, oil fumes generated in factories are provided with a cap-shaped cover at the end of the chimney of the factory, collected, and burned by a burner or the like for treatment.

[0003]

However, in particular, the smell is difficult to eliminate, and the local residents adjacent to the factory have been making noise as a pollution problem. On the other hand, legislation was enforced as a measure against smog, and some measures had to be taken into account. Smog generated during the manufacturing process of a factory must be countered at the factory. Some factories have installed large-scale smog elimination devices, but the cost has been a bottleneck.

The present invention has been made to solve the above-mentioned problems, and provides a gas-liquid separation device for capturing pollutants such as bluesmog generated in an asphalt refining process and separating the pollutants into sludge and clean gas. The purpose is to do.

[0005]

To achieve the above object, the invention of the bluesmog elimination method according to the first aspect of the present invention comprises:
It consists of a main body of a gas-liquid separator having a cyclone action, a fan device provided outside the main body, a foaming liquid supply device, and a compressor, and smokes bluesmog and the like generated in a factory by a negative pressure action of the fan device. The foaming liquid, which is a mixture of water, a foaming agent, and a deodorant, is guided from the foaming liquid supply device to the main body through a liquid pipe, and the foaming liquid is provided in the middle of the liquid pipe. In the foaming device, the liquid foaming liquid is changed to foamy foaming liquid by the air pressure of the compressor, and the foaming foaming liquid is sprayed in the main body in a spirally rotating oil fume or the like, and the oily foam and the like are foamed. The liquid and the liquid are impacted and mixed to increase the number of bubbles and surround or infiltrate the separating gas and liquid, such as oily smoke. Submerges oil fumes in the air, and brings oil fumes and gas Is Yu, the clean gas discharged from the upper opening through a screen provided above, was discharged sludge was accumulated under the body sludge tank.

According to a second aspect of the present invention, there is provided a bluesmog removing apparatus, wherein a main body is vertically arranged at a predetermined distance from an outer cylinder having a hopper portion integrally formed at a lower portion of a substantially cylindrical case. The upper end of the flue duct penetrating through the side of the outer cylinder is connected to the open end of the flue duct in the tangential direction. A pipe-shaped nozzle with a closed lower end that sprays the foaming liquid guided from the outside of the outer cylinder to the inner peripheral surface side of the inner cylinder through a plurality of injection holes provided on the side, and is fixed in the hopper with a predetermined distance from the lower end of the inner cylinder A reversing plate having a bowl-shaped cross section as a guide surface, a water supply pipe for supplying water into a hopper provided on the lower side of the outer cylinder, an exhaust duct for discharging gas and the like from the upper end of the outer cylinder, and a hopper. Drain sludge submerged in water from below into sludge tank Which is constituted by the discharge port.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a process diagram showing a process in which bluesmog generated in an asphalt refining plant is guided to a bluesmog removing device of the present invention and separated into sludge material and clean gas. FIG. 2 is a sectional view showing the inside of the main body of the bluesmog removing device. FIG. 3 is a sectional view taken along the line II of FIG. FIG. 4 is a general sectional view of a pipe-shaped nozzle. FIG. 5 is a sectional view taken along line II-II of the lower end of the pipe-shaped nozzle of FIG.

The bluesmog elimination device A of the present invention forcibly sucks oil smoke and the like generated in a factory into the bluesmog elimination device by the negative pressure action of a fan device disposed behind the bluesmog elimination device A. The oil and smoke are separated into gas and liquid by the cyclone effect in the bluesmog elimination device.
Applying air pressure to a mixture of a foaming agent and a deodorant, and spraying a foamed foaming liquid into the separating oil fumes and the like by applying air pressure, the oil fumes and the like are wrapped in bubbles, and fine particles such as oil fumes, floating dust, and odors Is prevented from diffusing into the atmosphere, oily smoke and the like are separated into clean gas and sludge such as oily mud, and discharged from the apparatus.

Hereinafter, embodiments of the present invention will be described in detail. Bluesmog such as oil fumes generated from the distillation residue in the asphalt manufacturing plant is composed of ash, oil fumes of incompletely combusted dust, and special odors generated by chemical changes. As shown in FIG. 2, the bluesmog elimination device A of the present invention comprises:
Largely, an outer cylinder 1, an inner cylinder 5, a pipe-shaped nozzle 3
And a main body H composed of a reversing plate 4, a water supply pipe 17, and a duct 12, a device disposed around the main body, and the like.

First, a device disposed around the main body H will be described. The equipment is as follows. A flue duct 11 is guided to the side of the outer cylinder 1 of the main body H from the factory 20 side.
A liquid foaming liquid L is supplied from a foaming liquid supply device 26 such as a foaming agent by a foaming device 27, and an air pressure from a compressor 28 is applied thereto. A water supply pipe 17 is guided to the lower side of the outer cylinder 1, and in a subsequent process of the exhaust duct 12 of the main body H, oil smoke or the like is forcibly drawn from the flue duct 11 by a negative pressure action and exhausted from the exhaust duct 12. A fan device 19 is provided. The fan device 19 is a turbo fan, but may be a plate fan. Further, a sludge tank 15 for storing drainage is disposed via a discharge pipe 31 which is connected to the discharge port 21 at the bottom of the hopper section 2.

Next, the structure of the main body H will be described. As shown in the figure, the main body H is configured such that oil smoke and the like S are guided through a flue duct 11 provided on the ceiling side of a factory 20 and installed via a pedestal 25 adjacent to an asphalt manufacturing factory. It has a height of about 5 meters from the ground to the top of the outer cylinder.

The outer cylinder 1 of the main body H has a substantially cylindrical upper part and a slightly lower cylindrical part for mixing oil smoke and the like with the lower part. The lower hopper part 2 has a funnel-like shape at the lower end. Discharge port 21
Having. The hopper section 2 is provided with a sensor 32, which detects the state of accumulation of the heavy matter spontaneously settling in the hopper section 2 and drives the pump 30 provided in the middle of the discharge pipe 31 to remove the heavy matter O. As a method of extracting the heavy material O from the hopper section 2, there is a timer method in addition to the above-described sensor method. In the case of the timer method, the sludge time is measured in advance in the pump 30, and the time is set on a timer, and the pump is sequentially and repeatedly driven to remove the heavy material O.

The inner cylinder 5 is vertically arranged at a predetermined interval from the inside of the outer cylinder 1, the upper cylinder having a bottom is inverted, and the lower end forms an expanded guide portion 6 to form the outer cylinder 1. Is fixed inside. An intake port 9 is formed on the upper peripheral surface of the inner cylinder 5 so as to tangentially connect a flue duct 11 penetrating the upper peripheral surface of the outer cylinder 1. The reason why the suction port 9 is tangentially connected to the inner cylinder 5 is that the fluid such as the oil smoke flowing from the flue duct 11 is swirled and lowered in the inner cylinder 5 by utilizing centrifugal force and gravity. It is a known cyclone for separating fine particles in a fluid.

Below the inner cylinder 5, there is provided a reversing plate 4 having a bowl-shaped cross section, which is a guide surface fixed in the lower portion of the cylinder or in the hopper 2 at a predetermined distance from the lower end of the inner cylinder 5. Similarly, the entire periphery of the lower peripheral surface of the inner cylinder 5 is provided with a flow restricting portion 7 which is a guide surface for reversing the contact bubbles that have wetted by reacting with oil smoke, floating dust, odor and the like from the reversing plate. . In the reversing plate 4, the foamy gas is smashed into the liquid to form droplets and the gas-liquid is mixed, and the foamed foamed liquid mixed by the force of the droplets (impact) is reversed on the side surface 4c of the reversing plate 4, and The bubbling of the foamed liquid wrapping the gaseous liquid by reversing at the squeezing section 7 is further assisted. Bottom 4a of reversing plate 4
Is made of a punching plate 4b, and water can freely enter and exit. At an intermediate position of the outer cylinder 1, a mesh screen 8 is provided along the inner periphery to prevent the bubbles f from flowing out to the upper duct.

From the upper bottom of the inner cylinder 5, it communicates with the liquid pipe 13 of the foaming liquid, penetrates the upper peripheral surface of the outer cylinder 1, bends, and further forms a small-diameter pipe penetrating the inner cylinder 5. The nozzle 3 is guided inside. This pipe-shaped nozzle 3 has an inner cylinder 5
It is fixed at the upper bottom. As shown in the figure, the pipe-shaped nozzle 3 has a plurality of ejection holes 10 for spraying in the circumferential direction of the inner surface of the inner cylinder 5 on the peripheral surface side, and a socket 18 on the peripheral surface side of each ejection hole 10. And fixed socket 1
The foaming nozzle 14 is screwed into the threaded through-hole provided at 8.
The foaming nozzle 14 is supplied with the foaming foaming liquid F flowing into the pipe-shaped nozzle 3 through the nozzle hole of the foaming nozzle 14.
Spreads out to the side. The three orifices 10 are provided on the same peripheral surface, and the intervals between the upper and lower orifices 10 are provided at predetermined intervals. A plug blind plug 32 is screwed into the opening 3a at the lower end of the pipe-shaped nozzle 3, as shown in FIG.

A blowing agent and a deodorant 2 are supplied to the pipe-shaped nozzle 3.
2 and water 23 are mixed with a liquid foaming liquid L,
Further, the foamed foaming liquid F which is foamed by the air pressure of the compressor 28 is further fed therein. The liquid chemical of the foaming agent and the deodorant are forcibly fed into the liquid pipe 13 by a pulse pump (diaphragm pump) provided in the middle of the branch pipes 23b, 22b, 24b. The foaming liquid F is supplied from a foaming liquid supply device 26 for foaming installed at a location away from the main body H. In this example, they are separated from each other, but they may be incorporated in the vicinity of or in the main body H. As shown in FIG. 1, the foaming liquid supply device 26 includes a water tank 23, a foaming agent tank 22 as a chemical, and a deodorant tank 24. Water pump 23a provided in water tank 23
Is a two-stage high-pressure pump (flow rate is 0.833 meters per second,
Use a lift of 32 meters). The foaming agent tank 22 and the deodorant tank 24 include a pulse pump (diaphragm pump) 22.
a and 24a are provided, and at a flow rate of the branch pipe 23b of the water pump, the branch pipes 22b and 24b are forcibly fed into the liquid pipe 13 and the mixed liquid is fed to the foaming device. In addition, each branch pipe 22
Check valves 22c, 23c, and 24c are provided in b, 23b, and 24b, respectively, so that the liquid drawn from each tank does not return.

The liquid foaming liquid L comprises water, a foaming agent 22 as a chemical, and a deodorant 24. The foaming agent, which is a chemical,
Use a drug with high foaming power and high foam stability. The foaming agent is based on α-olefin sulfonate (AOS), which is a synthetic surfactant, (99.9%), and further uses a foaming agent, a foam enhancer, and a stabilizer. Eporion N6C or N7C is used as a deodorant.

Next, the bluesmog removing device A of the present invention
The operation of will be described. Oil S such as bluesmog generated at the factory 20 is sucked from the flue duct 11 to the inner cylinder 5 in the outer cylinder 1 by the negative pressure of the turbofan 19 which is a fan provided downstream of the apparatus A. The oil and smoke and the like enter the tangential direction of the inner cylinder 5 through the pipe 9 and fall down while flowing in the inner cylinder 5 while swirling (cyclone). In this case, the flow velocity on the inner surface outside of the inner cylinder is faster than that on the inner surface inside. Heavy matter such as oily smoke S is pressed against the inner wall of the inner cylinder 5 by centrifugal force and gravity, and descends while separating from light matter. In that case,
The center is low pressure. A heavy substance is a substance of 10 μ or more, and a light substance is a substance of 10 μ or less.

On the other hand, a liquid foaming liquid L mixed with a foaming agent and a deodorant is converted into a foaming foaming liquid F by an air pressure in a foaming device 27, and the foaming is performed by the pressure of a water pump 23a and the air pressure of a compressor 28. Injection liquid 1 of the pipe-shaped nozzle 3
The foamed foaming liquid 14 is ejected in a diffusing manner from the foaming nozzle 14 provided at the position 0, and the foamed foaming liquid F collides with the inner wall of the inner cylinder 5 (impact) to further increase the foam f. The foam f intersects with the oil smoke S descending downward while swirling, and impacts and mixes with fine particles such as oil smoke and the like, floating dust, and odor, and adheres, wets, or surrounds, and forms a droplet, which rises downward. A part of the foam is broken by colliding with the surface of the water, which further promotes the increase of the foam, and the heavy matter of the fine particles in the foam penetrates into the water and melts, and precipitates as sludge. Others are splashed back into the air on the side face 4c of the reversing plate, which is the guide surface, and hit the upstream restraint section 7, which is also the guide surface. Increase the number. Repeatedly, a shock is applied to the foam to apply pressure to the foam, thereby deforming the foam and assisting gas-liquid separation of the oily smoke in the foam. The rising of the bubbles is suppressed by the screen 8 which is the upper filter, and the clean gas G and a part of the water vapor, etc., which do not have the bubbles passing through the screen 8, are discharged from the outlet 19a of the fan device 19 through the exhaust duct 12. . Many bubbles f have gas,
Fine particles of odor, oily smoke, and fine particles (dust) floating in gas enter to form bubbles. And the outer cylinder 1 inner screen 8
Stop below. The foam f is a close contact foam and has a high foaming power and a high foam stability. The size of the bubbles is not constant but varies.
A foaming liquid formed from a foaming liquid containing a foaming agent and a deodorant is usually difficult to cut and peel off due to close contact bubbles. Therefore, the gas,
Once the odor, oily smoke fine particles, and floating fine particles are once trapped in the bubbles to form bubbles, the bubbles are in close contact with each other and the bubbles are difficult to separate from each other, and there is no risk of oily smoke and the like leaking into the atmosphere. The foam is maintained for about 10 hours. When the foam disappears, the substance inside comes out as fine particles and gas adhering to the foam. gas,
As for the odor, the substance gets wet inside the foam inside the foam and
Reacts with the foaming agent of the foam and repeats chemical reactions such as oxidation, neutralization, decomposition, etc., gas and odor are discharged as clean gas, heavy particulates fall into the water, bubbles disappear and sludge becomes Settles in the sludge tank. The fine particles of light matter are foamy and wander in the air to rise.

The sludge from which bubbles have disappeared and settled out of the hopper portion 2 of the outer cylinder 1 is periodically drained from the discharge port to the sludge tank 15 via the discharge pipe 31. The sludge discharged from the hopper 2 may be separated by a classifier (not shown) by using fine particles having different sizes in the fluid by using a difference in sedimentation speed.
The water in the water supply pipe 17 is automatically replenished during the operation of the device A. The water level adjuster 16 adjusts the height of the water surface of the bluesmog removing device with a check valve or the like.

[0022]

Since the present invention has the above-described structure, the following effects can be obtained.

Since the bluesmog and the odor are suppressed in the foam formed by mixing the foaming agent and the deodorant, the outside air is not polluted. Ideal for pollution control.

A large amount of bluesmog can be suppressed with a relatively small amount of foam, and is economical without secondary pollution.

The equipment is simple and the equipment cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a flowchart of a method for removing bluesmog according to the present invention.

FIG. 2 is a general sectional view showing a bluesmog removing apparatus.

FIG. 3 is a sectional view taken along the line II of FIG. 2;

FIG. 4 is a general sectional view of an end of a pipe-shaped nozzle.

FIG. 5 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

 A Blue Smog Elimination Device H Main Body S Oily Smoke L Liquid Foaming Liquid F Foamed Foaming Liquid G Clean Gas O Heavy Material W Water f Foam 1 Outer Cylinder 2 Hopper 3 Pipe Nozzle 3a End 4 Reversing Plate 5 Inner Cylinder 6 Guide Part 7 Suppression part 8 Screen 9 Suction port 10 Injection hole 11 Flue duct 12 Exhaust duct 13 Liquid pipe 14 Socket 15 Sludge tank 16 Water level adjuster 17 Water supply pipe 18 Foaming nozzle 19 Fan device 19a Blow outlet 20 Factory 21 Discharge port 22 Foaming agent tank 22a Pump 23 Water tank 24 Deodorant tank 25 Stand 26 Foaming liquid supply device 27 Foamer 28 Compressor 29 Air hose 30 Pump 31 Drainage 32 Plug blind plug

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01D 47/04 53/77 F-term (Reference) 4D002 AA40 AB02 BA02 BA16 CA01 CA04 DA35 DA64 DA70 EA13 HA01 4D032 AA02 AC03 AC09 AE01 BA03 BA06 BB18 DA01

Claims (2)

[Claims] The apparatus comprises a main body of a gas-liquid separator having a cyclone action, a fan device provided outside the main body, a foaming liquid supply device, and a compressor. By pressure action, it is led into the main body through a flue duct, while a foaming liquid obtained by mixing water, a foaming agent and a deodorant from a foaming liquid supply device is guided to the main body through a liquid pipe, and the foaming liquid is a liquid. In the foaming device provided in the middle of the pipe, the liquid foaming liquid is changed to foamy foaming liquid by the air pressure of the compressor, and the foaming foaming liquid is sprayed into the spiral smoke that descends in the spiral in the main body, and the oily smoke, etc. This foamy foam liquid is colliding and mixed to increase the number of bubbles and surround or infiltrate the gas liquid such as oil fumes that are being separated, and splatter splashes on the water surface and the guide surface stored in the main body, and Submerge the oil smoke in the foam of the heavy material, and the oil smoke and gas in the foam of the light material. Floats on the water surface, discharges clean gas from the exhaust duct through the screen provided above,
A method for eliminating bluesmog, wherein the sludge accumulated under the main body is discharged into a sludge tank. 2. An outer cylinder having a main body integrally formed with a hopper at a lower portion of a substantially cylindrical case, and a flue duct which is vertically disposed at a predetermined interval from the inside of the outer cylinder, and penetrates a side surface of the outer cylinder. Tangentially connected to each other, an inner cylinder with a bottom at the top and an expanded bottom at the bottom, and penetrates the side of the outer cylinder and hangs down from the top of the inner cylinder to the inside, and the foaming liquid guided from the outside of the outer cylinder to the side A pipe-shaped nozzle having a closed lower end for blowing the inner peripheral surface of the inner cylinder from the plurality of injection holes provided, and a reversing dish having a bowl-shaped cross section that is a guide surface fixed in the hopper with a predetermined interval from the lower end of the inner cylinder, A water supply pipe that supplies water into the hopper provided on the lower side of the outer cylinder, an exhaust duct that discharges gas and the like from the upper end of the outer cylinder, and a discharge port that discharges sludge submerged in water from below the hopper. And a bluesmog elimination device.