KR100294724B1 - Wet type dust removing apparatus equipped with cyclone - Google Patents

Abstract

PURPOSE: A wet type dust removing apparatus equipped with a cyclone is provided which improves a dust collection efficiency by connecting a humidifier to the inlet side, thereby applying humid air into a gas containing powder and aerosol shaped dust. CONSTITUTION: In a dust removing apparatus comprising a cyclone(2), a hopper(21), an inner wall drying device(22) surrounding the cyclone(2) and the hopper(21), and a humidification means, the wet type dust removing apparatus equipped with a cyclone is characterized in that the humidification means is a humidifier(13) consisting of a container(23) in which water for humidification is contained, a line(5) one end of which is connected to an entrance conduit(4), and the other end of which is positioned at a position above the surface of the water inside the container(23) so as to supply bubbles generated inside the container(23) to the entrance conduit(4), a sealing cap(24) compressed and inserted into the upper end of the container so as to prevent leakage of bubbles into the outside of the container, an air pump(26) which is penetrated and inserted into the sealing cap(24), and connected to the opposite side to the container of the line(25) so that bubbles are generated in the water for humidification by the line(25), a switch valve(8) which is mounted on the middle of the line(25) so as to control an amount of air supplied into the container(23), and a heating means(27) heating the container(23) through the outer surface thereof, wherein the heating means(27) further comprises an outer container(29) surrounding the container(23) in the sealing state so as to form a heating fluid channel(30) between the heating means(27) and the outer circumferential surface of the container(23), and a thermostat(31) circulating a heating fluid into the channel(30) through a return line(10) connected to the upper end of the outer container(29) and a supply line(3) connected to the lower end of the outer container(29).

Description

Humidified Dust Removal Device with Cyclone

The present invention relates to a humidified dust removal device having a cyclone, and more specifically, by connecting a humidifier (humidifier) for controlling humidity to an inlet side, dust by applying wet air to a gas containing powder and aerosol-type dust The present invention relates to a humidified dust removing device having a cyclone applied to a general industrial facility, particularly a nuclear power plant, with improved collection efficiency.

Powder and aerosol-type dust from nuclear and general industrial installations is subject to strict regulations because of pollution to the respiratory system due to pollution of the environment as well as sewage. Therefore, each industry is trying to prevent the transition to the environment by installing a filtration device in the air conditioning system to remove dust generated in each process. Particularly where dust is generated, the cyclone is used as a pretreatment filter, and it is used in series by connecting them in series or in parallel.

However, through many studies and experiences so far, the cyclone-based dust removal device is characterized by its characteristic that fluids containing dust are induced into the cyclone, which separates the dust in the fluid flowing by centrifugal and frictional forces. In the case of large dust (more than 5㎛), the collection efficiency is over 90%, but the efficiency is lower for the dust below, so the intermediate filter is connected to the cyclone to remove even small dust. High Efficiency Particulate Air (HEPA) filter, which is a high-performance air filter that can remove even the dust of 99.97% or more, has been used.

One example of such a dust removal device is US Pat. No. 5,120,165. The excavation system disclosed in this patent is designed to separate and collect the excavation in the air flow carried by two cyclones arranged up and down, and to separate the toxic gas or dust in the exhaust gas by a separate HEPA filter It is supposed to be.

In addition, various methods have been sought to increase the dust collection efficiency of the cyclone, and for example, a dust removal device has been developed in which a spraying device is sprayed to spray water into the cyclone. An example is the microbial removal and air conditioning apparatus disclosed in US Pat. No. 4,295,343.

This device differs from the above mentioned excavation system in the application field, but has the same conceptual concept in removing microorganisms or dust in the air. However, by spraying water with a spray nozzle mounted therein, fine dust or microorganisms are attached to and removed from the inner wall of the cyclone, so that clean and moist air can be recycled to the room.

Another type of invention using a watering device is US Pat. No. 4,976,210. The hazardous waste treatment apparatus disclosed in this patent is adapted to remove impurity particles from the exhaust gas by spraying water on the baffle while generating a rotary airflow in the exhaust gas by a cyclone.

In addition, the air-carrying particle extraction device disclosed in US Patent No. 4,015,957 uses a watering device, which is uniformly dispersed in the form of a spray, such as water in the air and cyclone chamber containing particles By mixing, the particles in the air are removed by the porous particle collector.

Another dust removal device that increases the dust collection efficiency of the cyclone includes inventions such as a cyclone separator having a multi-vane gas inlet disclosed in US Pat. No. 3,969,096 and a cyclone separator having a flow guide blade disclosed in US Pat. No. 4,344,538. These inventions have multiple vanes or guide blades attached to the inlet portion to guide the gas containing impurities introduced into the cyclone separator through the inlet to improve the efficiency of removing impurities from the gas.

In addition, the dust removal efficiency can be increased by making the dust contained in the fluid soluble and enlarging the dust, making the walls of the cyclone into various materials to react the dust, or making the cyclone wall double to rotate the outer wall. Various types of exhaust gas purifiers have been developed to remove dust from polluted exhaust gases by using cyclones.

However, various types of dust removal devices as mentioned above have increased another waste due to the generation of secondary pollutants due to the use of liquid when using separate watering devices as in US Pat. Nos. 4,976,210 and 4,015,957. In the case of attaching a separate guide device to the gas inlet such as US Patent No. 3,969,096 or No. 4,344,538, the manufacturing process is complicated and the number of work is increased, and thus the manufacturing cost is high and it is not economical. there was. In addition, there was a problem that it is difficult to easily apply to the existing cyclone dust removal device of the basic form.

Accordingly, the present invention has been made to solve the problems of the conventional dust removal device having a cyclone as described above, the dust containing air flowing from the dust source through the humidifier connected to the inlet of the cyclone near the cyclone inlet To improve dust collection efficiency by increasing the centrifugal force of dust moving circularly inside the cyclone by humidifying before it is introduced into the cyclone to increase the weight of the dust itself by moisture adhesion and by causing the dust particles to aggregate together. The purpose is.

1 is a schematic view showing the configuration of each part of the dust removal apparatus according to the present invention.

2 is a detailed cross-sectional view of the humidifier shown in FIG.

3 is a schematic configuration diagram of an experimental apparatus for confirming the effect of the dust removal apparatus according to the present invention.

4 to 6 is a graph showing the dust collection efficiency by the dust removal apparatus of the present invention according to the type of dust,

4 is iron oxide dust.

5 is aluminum oxide dust.

6 shows the collection weight of chromium oxide dust according to the change of relative humidity.

* Explanation of symbols for main parts of the drawings

2: cyclone 4: inlet conduit

13: humidifier 20: dust removal device

21: Hopper 22: inner wall drying device

23 container 24 sealing cap

26 air pump 27 heating means

29: outer container 30: heating fluid flow path

31: thermostat

According to a feature of the present invention to achieve this object, a cyclone for separating and removing the dust from the dust containing gas sucked through the inlet conduit, and is mounted on the bottom of the cyclone to deposit the dust separated from the cyclone In the dust removal device comprising a hopper, an inner wall drying device which surrounds the cyclone and the hopper, and humidifying means connected to the inlet conduit to humidify before the dust-containing gas is introduced into the cyclone, The humidifying means is a container containing water for humidification therein, one end is connected to the inlet conduit to supply bubbles generated in the container to the inlet conduit, and the other end is located on the top of the water surface in the container; A crimping shovel on top of the container to prevent air bubbles from leaking out of the container An air pump connected to the container opposite to the line so as to generate air bubbles in the humidifying water by a sealing cap to be inserted, and a line penetrating into the sealing cap and extending to the bottom of the water surface, and mounted in the middle of the line. A humidifier comprising an on / off valve for regulating the amount of supply air to the furnace and heating means adapted to heat the vessel through an outer surface of the vessel; The heating means surrounds the container in a sealed state to form a heating fluid flow path between the outer circumferential surface of the container, the flow path through a supply line connected to a recovery line connected to an upper end of the outer container and a lower end. The present invention provides a humidified dust removing apparatus having a cyclone composed of a thermostatic bath configured to circulate a heating fluid.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Humidified dust removal device having a cyclone according to the present invention is a cyclone (2), the hopper 21 is installed at the lower end of the cyclone 2 as in the conventional dust removal device as shown in Figure 1 in Figure 1 And the inner wall drying apparatus 22 which surrounds the cyclone 2 and the hopper 21. Here, the cyclone (2) is to remove the dust from the dust containing gas flowing through the inlet conduit (4) from the dust source to discharge through the outlet conduit (1), the hopper 21 is a cyclone (2) It serves as a container for receiving and depositing dust separated and separated from the soil.

Thus, the dust removal device 20 of the present invention having the structure of the basic cyclone dust removal device is different from the conventional dust removal device in the humidifier (wall) of the inlet conduit (4) where the dust containing gas flows into the cyclone (2) ( 13), the dust-containing gas is humidified before entering the cyclone (2).

For this humidification, a humidifier 13 is connected to the inlet conduit 4 via a line 5. The humidifier 13 is again a container 23 containing the water for humidification, a line 5 connecting the container 23 and the inlet conduit 4, and an intermediate portion of the line 5 is inserted through the container. A sealing cap 24 fitted in the inlet of the 23 in a sealed state, bubble generating means 26 for generating bubbles in the water in the container 23 and heating means 27 for heating the container 23. .

Here, the humidifying water contained in the container 23 is clean water such as distilled water. In addition, the line 5 connecting the vessel 23 and the inlet conduit 4 supplies bubbles generated in the vessel 23 to the inlet conduit 4, wherein the vessel 23 side of the line 5 is provided. The tip is to maintain a certain distance above the surface of the humidified water to facilitate the transport of bubbles.

In addition, as the bubble generating means for supplying the compressed air through the line (9) can be used a conventional air pump 26, the container by the on-off valve (8) mounted in the middle of the line (25) The amount of compressed air supplied to (23) can be adjusted.

As the heating means 27 which heats the container 23 from the outside, a heating element having a simple structure such as a heater or the like may be used. In addition, the heating means 27 encloses the outside of the container 23 in a sealed state, and an outer container (1) integrally installed with the container 23 so as to form a heating fluid flow path 30 between the outer peripheral surface of the container 23. 29) and a heating body composed of a water bath 31 for circulating the heating fluid in the heating fluid passage 30 may be used.

Here, the flow path 30 and the thermostat 31 are connected to circulate the heating fluid through the recovery line 10 connected to the upper end of the outer container 29 and the supply line 3 connected to the lower end, and the container 23 ) Is to be able to replenish or replace the humidified water inside the evaporated by the water supply line 15 and the opening and closing valve 32 connected to the lower end.

According to the dust removal apparatus of the present invention configured as described above, the heated water is simply put into the supply line 3 of the humidifier 13 through an existing thermostat or a heater to circulate through the recovery line 10, and The container 23 is filled with a predetermined amount of humidifying water, such as distilled water or water, heated by a heating fluid flowing through the flow path 30 formed between the outer container 29, and bubble generating means such as an air pump 26 is provided. A line 9 including an on / off valve 9 is positioned below the surface of the distilled water contained in the inner container 23 of the humidifier 13 to control the amount of air, thereby generating bubbles by supplying air. do. This bubble is connected to the line 5 that enters the inlet conduit 4 of the cyclone 2 and ultimately to control the humidity of the cyclone 2. In addition, the line 5 is located above the water surface to prevent air bubbles from directly entering the cyclone 2 in advance.

The outer container 29 of the humidifier 13 forms a heating means together with the thermostat 31, and the water heated by the thermostat 31 enters the supply line 3 and exits through the recovery line 10. It will cycle.

The vessel 23 generates bubbles by causing the pressurized air injected from the air pump 26 to flow through the line 9 to be introduced below the surface of the water in the vessel 23, and then generate the cyclone 2 through the line 5. Is supplied to the inlet conduit (4) to mix with gas containing dust.

When the humidified dust and the like are separated from the gas in the cyclone 2 and accumulated on the inner wall of the cyclone 2, high-speed injection of dry air into the inside of the cyclone 2 or the outer wall of the cyclone 2 to the inner wall drying device 22. By heating to an appropriate temperature by drying the inside of the cyclone (2) and then lightly hit the dust deposited in the cyclone (2) can be collected in the hopper (21).

In order to prove this by experiment, the results were taken by directly photographing the filter paper in order to see the visual change of the collection efficiency according to the humidity change.The balance can be weighed precisely to 4 decimal places to see the change in weight gain. Using to measure the weight before and after each experiment of the filter paper to ensure the reliability of the efficiency increase. According to the experimental results, not only the effect of the collection with the change of humidity was clearly visually distinguished, but also the clear result was obtained when the original filter weight without dust collection and the weight of the filter containing dust were measured.

The configuration of the experimental apparatus for proving this is shown in FIG. 3, and when 3g of dust is injected into the cyclone inlet, the collection efficiency results are based on the amount of dust accumulated in the filter paper located at the outlet. As shown in FIG. 6, as shown in the figure, the collection efficiency was greatly improved according to the change of humidity for all the dust used in the experiment. When the dust collected in the dust collector was analyzed by the Coulter Multisizer, which was manufactured by Coulter Electronics, it was found that even fine dust was collected together with the coarse dust.

As such, the dust removal system according to the present invention can be applied as it is to the conventional dust removal apparatus, and in this case, even fine dust of 5 μm or less can be removed with high collection efficiency, which brings about a reduction in dust removal cost.

In addition, despite the humidification performance, the structure of the cyclone itself maintains its simple form, so that the frequency of obstacles to dust removal, such as failure, breakage, or blockage, is greatly reduced, thereby increasing the reliability of the filtration device. do. In addition, since the amount of dust deposited on the intermediate filter and HEPA filter can be greatly reduced, it can be used for a long time without changing or replacing the filtration system.

In particular, the removal of dust with radioactive and toxic substances requires another process to remove the used filter itself as a waste, but according to the present invention it is possible to drastically reduce the amount of contaminated filter waste. Secondary environmental pollution due to this can be prevented.

When the dust removal efficiency decreases due to the dust deposited on the cyclone wall, the drying air is injected into the cyclone at high speed, or the cyclone outer wall is heated to an appropriate temperature to be dried, and then lightly hit the outer wall to remove the dust mass easily. Therefore, it is possible to perform a continuous dust removal operation more effectively.

While the invention has been shown and described with respect to particular embodiments, those skilled in the art will recognize that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the appended claims. Anyone can easily know.

Claims (2)

A cyclone (2) for separating and removing dust from the dust-containing gas sucked through the inlet conduit (4), and mounted on the lower end of the cyclone (2) to deposit dust separated from the cyclone (2) A hopper 21, an inner wall drying device 22 which surrounds the cyclone 2 and the hopper 21, and an inlet conduit 4 are connected to the gas containing dust into the cyclone 2. In the dust removal apparatus 20 including a humidifying means to be humidified before being introduced, the humidifying means is a container 23 containing a humidifying water therein, and the bubbles generated inside the container 23 One end is connected to the inlet conduit 4 to supply the inlet conduit 4, and the other end of the line 5 is located at the upper surface of the water in the container 23, and bubbles leak out of the container 23. Is pressed into the top of the container to prevent Air connected to the container 23 of the line 25 opposite the vessel 23 to generate air bubbles in the humidifying water by the rod cap 24 and the line 25 inserted into the sealing cap 24 and extending to the bottom of the water surface. The container 23 is connected through a pump 26, an on-off valve 8 mounted in the middle of the line 25 to regulate the amount of supply air to the container 23, and an outer surface of the container 23. A humidifier 13 composed of heating means 27 adapted to heat; The heating means 27 surrounds the container 23 in a sealed state to form a heating fluid flow path 30 between the outer circumferential surface of the container 23 and the outer container ( 29 is characterized in that it consists of a thermostat 31 is configured to circulate the heating fluid in the flow path 30 through the recovery line 10 connected to the upper end and the supply line 3 connected to the lower end. Humidification type dust removal device equipped with a cyclone. According to claim 1, wherein the container 23 is provided with a cyclone, characterized in that the water supply line 15 and the opening and closing valve 32 connected to the lower end to replenish and replace the water for humidification. Humidifying dust removal device.