JPS6126439Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a self-purifying flue gas treatment device for purifying the flue gas discharged from the soundproof tube of a pile driver.

Conventionally, in order to reduce noise during pile driving, the entire pile driving machine and the leader that guides the pile driving machine have been covered with a soundproof cylinder. This soundproof tube is a large cylindrical structure approximately 20 to 30 meters in height, and is equipped with various sound-absorbing materials inside, as well as a blower at the top of the soundproof tube for internal ventilation.

In addition, when using a soundproof tube, the exhaust smoke from the pile driver is concentratedly discharged from the top of the soundproof tube, so even if the flue gas emitted from the pile driver is at a low concentration, It is conspicuous when it is emitted, and the smoke is scattered over long distances, worsening the environment.

As a countermeasure to this problem, the present inventor has developed an impingement-type smoke exhaust treatment device shown in Fig. 1, a second
We tried the shower type flue gas treatment device shown in the figure, the filter type flue gas treatment device shown in Figure 3, and a combination type flue gas treatment device that combines the above three, but all of them had problems in terms of practicality. .

In other words, in the case of the collision type flue gas treatment device,
This method removes dust and mist in flue gas by colliding with a large number of collision plates 7 in the flue gas flow path to increase the particle size and weight of the dust and mist, but the removal efficiency is high. In order to do this, it is necessary to rapidly slow down the flow rate of the flue gas, so the external dimensions of the treatment device become significantly large, making it unsuitable for use on site with a pile driver.

In the case of a shower-type flue gas treatment device, a pump 9 driven by an electric motor 8 injects a cleaning liquid such as water or a solvent into the flue gas from a shower nozzle 10, thereby reducing the collision effect between the shower cleaning liquid and the flue gas. This method uses the particle falling effect, which is based on the enlargement of particles caused by splashes of shower cleaning fluid, to perform cleaning, but in order to improve the cleaning effect, the amount of cleaning fluid must be significantly increased, or the flow rate of exhaust gas must be considerably slowed down. This results in secondary scattering of sewage after cleaning, making the device bulky, and making it difficult to use at pile driving sites.

In the case of a filter-type treatment device, the exhaust gas is passed through a filter 11 made of mesh or paper, and since the filter 11 is housed in the exhaust gas flow path, the device can be made relatively compact and the treatment efficiency can be improved. Although it has the advantage of being expensive, the filter is easily clogged and maintenance is time-consuming. For this reason, as shown in FIG.
It is necessary to configure the system so that it is wound up or to circulate the filter for cleaning, but this makes the device large and difficult to use at pile driving sites.

In addition, in the case of a combination type processing device that combines the collision type, shower type, and filter type, high effectiveness can be expected, but maintenance is time-consuming and
Another disadvantage is that the device becomes large.

The object of this invention is to provide a self-cleaning flue gas treatment device for a pile driver that advantageously solves the above-mentioned problems.

Next, this invention will be explained in detail using illustrated examples.

5 to 7 show an embodiment of this invention, in which a circular end plate 17 is attached to the upper end of a vertical shaft 16 that is rotated by a drive device 1 consisting of an electric motor.
The central part of is fixed, and around the end plate 17,
The upper end of a vertical rotary filter 2 having a circular cylindrical cross section is fixed, and the rotary filter 2 is attached to the end plate 1.
An annular end plate 1 arranged around and below 7
8, an inner porous cylinder 20 with a circular cross section and an outer porous cylinder 21 with a circular cross section, arranged around the end plate 17 and between the annular end plate 18, and an inner porous cylinder 21 with a circular cross section. 20 and a cotton-like body 22 made of oil-resistant and oil-resistant fibers filled between the outer porous cylinder 21 and the upper and lower ends of the inner porous cylinder 20 and the outer porous cylinder 21, respectively. It is fixed to the plate 17 and the annular end plate 18.

A vertical fixed filter 23 having a circular cylindrical cross section is disposed outside the rotary filter 2, and this fixed filter 23 has a number of connecting rods 26 connecting an annular upper end plate 24 and an annular lower end plate 25, and an annular Filled between the inner porous cylinder 27 with a circular cross section and the outer porous cylinder 28 with a circular cross section, which are arranged between the upper end plate 24 and the annular lower end plate 25, and the inner porous cylinder 27 and the outer porous cylinder 28. The inner porous cylindrical body 27 and the outer porous cylindrical body 2
Both upper and lower ends of 8 are fixed to an annular upper end plate 24 and an annular lower end plate 25.

The rotating filter 2 and the fixed filter 2
3 is housed in a casing 3, a flue gas supply pipe 4 communicating with the lower part of the rotary filter 2 is penetrated and fixed in the center of the lower part of the casing 3, and an outer periphery of the rotary filter 2 is fixed in the upper part of the casing 3. A clean air outlet 5 is provided on the inner periphery of the fixed filter 23, and the fixed filter 23
In the annular space 30 between the outer periphery of the casing 3 and the peripheral wall of the casing 3, a plurality of annular support plates 31 that are inclined diagonally downward from the inside to the outside are arranged at intervals in the vertical direction, and each annular support plate 31 is fixed to the peripheral wall of the casing 3 and the fixed filter 23, and the fixed filter 23 is supported by the peripheral wall of the casing 3 via an annular support plate 31, and a large number of through holes 32 are formed on the outer peripheral side of the annular support plate 31. It is provided.

At the center of the rotary filter 2, there is provided an annular cleaning liquid injection nozzle 6 having a large number of injection ports 33 around the periphery. An outlet side filter 38 is connected to the cleaning liquid tank 37 and provided at the upper part of the casing 3, and the outlet side filter 38 is connected to the casing 3.
It is composed of a cylinder 39 fixed to the cylinder body 39, a porous plate 40 fixed to the lower part of the cylinder body 39, and a cotton-like body 41 made of oil-resistant and lipophilic fibers filled in the cylinder body 39.

Inside the casing 3, a funnel-shaped drain receiving member 42 is disposed below the outlet side filter 38, and the drain receiving member 42 is fixed to the casing 3 via a mounting rod (not shown) and is connected to the drain. A drain pipe 43 connected to the lower part of the receiving member 42 passes through the casing 3 and is guided to the outside. An annular receiving gutter 45 located below is integrally provided, and the annular receiving gutter 45 is provided with a discharge port (not shown), and a drain discharge pipe 46 is connected to the lower part of the casing 3.

The self-cleaning flue gas treatment device configured as described above is mounted on the traveling vehicle 47 of the mobile pile driver,
Further, the smoke exhaust port at the upper part of the soundproof cylinder 48 surrounding the pile driver and the flue gas supply pipe 4 are connected via a smoke exhaust pipe 49.

Exhaust smoke is supplied from the soundproof cylinder 48 into the rotary filter 2 via the exhaust smoke conduit 49 and the exhaust smoke supply pipe 4,
When the flue gas passes through the rotary filter 2, dust and mist in the flue gas are collected by the rotary filter 2. The dust and mist adhering to the rotary filter 2 are cleaned by a cleaning liquid containing, for example, a surfactant, which is sprayed continuously or intermittently from the nozzle 6 toward the periphery of the rotary filter, and the cleaning liquid is The centrifugal force given by the rotation of the rotary filter 2 causes it to pass through the rotary filter 2, and the passing flow of this cleaning liquid washes away the dust and mist adhering to the rotary filter 2, and the contaminated cleaning liquid containing the dust and mist is The particles become large in the rotating filter 2, are blown away by centrifugal force, and are collected by the fixed filter 23.

The purified air that has passed through the rotary filter 2 and the purified air that has passed through the fixed filter 23 flows upward, passes through the outlet filter 38, and is then released into the atmosphere from the clean air outlet 5. In addition, the dirty cleaning liquid collected by the fixed filter 23 is
The dirty cleaning liquid that has flowed onto the annular receiving gutter 45 and the annular support plate 31 and flowing into the annular receiving gutter 45 falls from the outlet at the bottom of the receiving gutter 45 to the bottom of the casing 3 and is discharged from the discharge pipe 46. , and the polluted cleaning liquid flowing onto the annular support plate 31 flows through the through holes 32.
After falling to the bottom of the casing 3, it is discharged from the discharge pipe 46.

As the material constituting each of the porous cylinders 20, 21, 27, 28, a rigid net-like body such as a bunching board or a rigid synthetic resin net is used, and the cotton-like bodies 22, 29 ,4
Examples of the fibers 1 include flocculent materials such as acetate fibers or polypropylene fibers.

Although the above embodiment is an example in which the rotating filter 2 and the fixed filter 23 are oriented vertically, this invention can also be implemented when the rotating filter 2 and the fixed filter 23 are oriented horizontally.

Furthermore, when implementing this invention, the fixed filter 23 and the outlet filter 38 may be omitted.

According to this invention, the flue gas supplied from the flue gas supply pipe 4 into the rotary filter 2 passes through the rotary filter 2.
When passing through the exhaust gas, dust and mist in the flue gas are collected by the rotary filter 2, and the dust and mist adhering to the rotary filter 2 are cleaned by a cleaning liquid sprayed from the nozzle 6, and the cleaning liquid is Its injection pressure and rotating filter 2
It passes through the rotating filter 2 due to the centrifugal force given by the rotation of the washing liquid, and the dust and mist adhering to the rotating filter 2 are washed away by the passing flow of the cleaning liquid, thereby preventing clogging of the rotating filter due to dust and mist. In addition, the exhaust gas treatment equipment itself has a filter self-cleaning function that combines the above-mentioned cleaning liquid injection and filter rotation, so there is almost no maintenance required. Since it does not take up much space and the device can be made smaller, it is suitable for use at pile driving sites.

[Brief explanation of the drawing]

1 to 4 are longitudinal sectional side views showing an embodiment of a conventional flue gas treatment device. Figures 5 to 7 show an embodiment of this invention,
FIG. 5 is a schematic side view showing the installed state of the flue gas treatment device, FIG. 6 is a partially vertical side view of the flue gas treatment device, and FIG. 7 is a sectional view taken along the line A--A in FIG. 6. In the figure, 1 is a drive device, 2 is a rotary filter, 3 is a casing, 4 is a flue gas supply pipe, 5 is a clean air outlet, 6 is a cleaning liquid injection nozzle, 16 is a vertical axis, 17 is an end plate, and 18 is an annular shape. End plate, 19 is a connecting rod, 20 is an inner porous cylinder, 21 is an outer porous cylinder,
22 is a cotton body, 23 is a fixed filter, 27 is an inner porous cylinder, 28 is an outer porous cylinder, 29 is a cotton body, 31 is an annular support plate, 32 is a through hole, 35 is a pump, and 37 is a cleaning liquid tank. , 38 is an outlet side filter, 41 is a cotton body, 42 is a drain receiving member, and 45 is an annular receiving gutter.

Claims (1)

[Scope of utility model registration request] A rotary filter 2 with a circular cross section that is rotated by a drive device 1 is provided in a casing 3, and the casing 3 includes a flue gas supply pipe 4 that supplies flue gas into the rotary filter 2, and a flue gas supply pipe 4 that supplies flue gas into the rotary filter 2. A clean air outlet 5 that communicates with the outside of the rotary filter 2 is provided, and a cleaning liquid injection nozzle 6 that sprays cleaning liquid toward the inner circumferential surface of the rotary filter 2 is provided in the space inside the rotary filter 2. A self-cleaning exhaust gas treatment device for pile driving machines.