KR20030018535A - Dust separator and incinerator using the separator - Google Patents

Abstract

PURPOSE: Harmful material in a high temperature gas is collected and discharged by a dust collecting device maximizing collecting efficiency. CONSTITUTION: A dust collecting device comprises a gas introducing port(4), a heat-resistant filter(12), a dust collecting bowl(8), a chimney(10), a water supplying portion, a waste water storing portion(24). A harmful gas of high temperature is flown into the gas introducing port. The harmful gas moves upward. The heat-resistant filter is installed in the middle of the passage. The dust collecting bowl is installed in upper part of the filter having a water injecting port(14) to inject water to the filter. The water collecting harmful material is stored in the waste water storing portion.

Description

Dust collector and incinerator using it {Dust separator and incinerator using the separator}

The present invention relates to a dust collector and an incinerator using the same, and more particularly, to a dust collector and a incinerator using the method of collecting and collecting the fine dust in the combustion products generated during the combustion of the waste with water vapor.

Conventional incinerators are generally equipped with a purifier for removing or neutralizing various harmful substances contained in the combustion chamber and the combustion products. As a purification method, there is a method of burning unburned noxious gas generated by providing a secondary combustion chamber, and there is a method of depositing dust using a cyclone. In some cases, as in Patent Application No. 1999-34211, it is possible to stack solid materials of different types, such as diatomaceous earth, zolite, activated clay, loess of loess, pass combustion gas therebetween, and cause catalyst or combustion to remove harmful substances. It has been proposed in one technique.

Alternatively, a wet dust collector may be employed, which collects dust and other particulate harmful compounds suspended in the combustion gas by spraying water vapor. However, according to this method, the collection efficiency was not satisfactory due to insufficient filtering means and injection method. In addition, there was a problem that a separate wastewater purification facility should be used by discharging the collected dust together with the wastewater.

The present invention has been made to provide an improved wet dust collector and an incinerator using the same. A more detailed object of the present invention is to provide a dust collecting device and an incinerator using the same, which can collect and discharge dust and other fine harmful compounds contained in a combustion product by improving the filtering method. Another object of the present invention is to maximize the collection efficiency by increasing the step of collecting dust.

1 is a block diagram of a dust collecting apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an incinerator in which the dust collector of FIG. 1 is introduced.

3 is a schematic configuration diagram of a combustion chamber of an incinerator according to the present invention.

4 is a schematic perspective view of an incinerator according to an embodiment of the present invention.

5 is a configuration diagram of the main combustion chamber of the incinerator according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

2 ; Dust collector 4; Gas inlet

6; Blower 8 (8a, 8b); Dust collector

12; Filter 14; Water jet

16; Water supply pipe 18; Air jet

22; Drain pipe 24; Wastewater Storage Department

28; Air supply pipe 30; incinerator

32,32 '; Main combustion chamber 34; Reburn chamber

36; Cyclone 38; Combustion chamber air nozzle

40; Ignition burner 42; Melt tube

43; Screw 48; mold

The above object is, the gas inlet is installed below so that the high temperature harmful gas containing the dust and other harmful compounds are introduced therein; It is installed in a passage where the harmful gas introduced through the gas inlet rises, and a heat resistant filter is installed over the entire passage, and water is sprayed onto the front of the filter so that water can be sprayed to the front of the filter. At least one continuously installed dust collecting container having a spray hole; A stack for exhausting the purified combustion gas following the dust collecting container; A water supply unit capable of supplying water through the water injection port; It is achieved by a dust collector, characterized in that it comprises a waste water storage unit is installed on the bottom of the gas inlet so that the water in the state of collecting the harmful substances such as dust falling down.

According to the present invention, the dust collecting apparatus includes: a main combustion chamber having a waste inlet, a burner, an air nozzle, and a combustion outlet; A blower for supplying air to the air nozzle; It may be installed in an incinerator including a reburn chamber for re-burning the gas flowing out of the main combustion chamber. This is made possible by allowing the combustion gas outlet of the reburn chamber to communicate with the combustion gas inlet.

According to the present invention, the filter used in the dust collector is formed by compressing a thin stainless steel wire or a chip thereof in the form of a thread to a predetermined thickness to the width of the passage. In addition, the particles of the filter may be set differently for each dust collecting step. For example, the bottom can be made relatively coarse using a rather thick stainless steel wire, and the top can be made denser by using a relatively thin steel wire.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 is a block diagram of a dust collecting apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating an incinerator in which the dust collector of FIG. 1 is introduced. 3 is an internal configuration diagram of a combustion chamber of an incinerator according to the present invention. 4 is a schematic perspective view of an incinerator according to an embodiment of the present invention. 5 is a configuration diagram of the main combustion chamber of the incinerator according to another embodiment of the present invention.

With reference to FIG. 1, the dust collecting apparatus 2 is demonstrated. The device has an upright structure due to the nature of the action. Hazardous gases of high temperature (hereinafter referred to as inlet gas) containing dust and other harmful compounds are introduced through the gas inlet 4 provided on the lower side of the apparatus. If the dust collector is applied to an incinerator similar to that shown in Figure 4, the temperature of the inlet gas will be about 700 ℃ to 850 ℃, if used in a chemical plant or foundry, the temperature may be lower. The blower 6 may be additionally installed at the gas inlet side to assist the rising air flow of the inlet gas. In other words, the inlet gas is introduced through the intake pipe of the blower.

The dust collecting container 8 is installed in a passage through which the harmful gas introduced through the gas inlet rises due to its high heat and / or wind pressure by the blower, and collects dust and the like contained in the harmful gas. The harmful gas passing through the dust collector is discharged to the atmosphere through the stack 10 in a state in which harmful substances are removed.

According to this embodiment, the dust collector is characterized in that the same or similar structure is repeatedly installed to be able to remove harmful substances over several times. As shown in FIG. 1, the dust collecting container 8 has a two-stage structure of the first dust collecting container 8a and the second dust collecting container 8b. In other words, not only the two-stage structure but also the one-stage structure as well as the three-stage or four-stage structure, depending on the state of use.

Hereinafter, the structure and operation of the dust collector (8) will be described. Two heat resistant filters 12a and 12b are provided spaced apart from one dust collector along a passage through which noxious gas passes. Several water jet holes 14 or nozzles are provided on the upper part of the upper filter 12a so as to spray water in a shower type. The water injection port is installed in such a state that water can be sprayed evenly over the front of the filter. The water injection port is supplied with water from a water source installed outside the apparatus by the water supply pipe 16.

Water is supplied in small droplets or in atomized form. Therefore, the rising harmful gas collides with the sprayed water, and in this process, the water absorbs or collects the harmful substances and condenses and falls downward.

According to the present invention, the filter 12 used above is made of stainless steel with high corrosion resistance. More specifically, the filter is formed in a compact form by compressing a thin wire or chip-shaped stainless steel wire into the passage area. The thickness will be sufficient to maintain its strength. If you want to double the effect of filtering can be formed to a thickness of more than 100mm. It should be noted that if the density is too high, no harmful gas can pass through the filter, so the stainless steel wire should be compressed properly.

The side of the dust collecting container 8 is provided with a door 20 for replacing or cleaning the filter 12. According to the filter according to the present embodiment, it can be easily cleaned and can be used semi-permanently because of its high corrosion resistance and chemical resistance.

The water supply pipe 16 extending to the side outer wall of the dust collecting container is connected to a water supply part such as a water supply tank, for example, indicated by reference numeral 17 of FIG. 4. The water supply will include a reservoir and a feeding means for pumping water from the reservoir. Since this can be easily configured by those skilled in the art, detailed descriptions and illustrations thereof will be omitted.

According to the present invention, a similar dust collecting process is repeated. Through this process, the following specific actions occur. That is, the water injected from the water injection port is evaporated by the high-temperature harmful gas rising from the lower side into a fine particle state. The dust contained in the noxious gas is fused to it by the characteristics of the suspended water in the form of particles. Thus, the mixture of larger water and dust adheres to the tight gap of the filter by weight, and gradually becomes a large particle state. The water, which has grown in the form of droplets, becomes larger by the surface tension and falls downward while descending downward along the gap of the filter.

Under the dust collecting container, the drain pipe 22 extends to the wastewater storage unit 24 in the form of a tank, and the wastewater containing dust is accumulated in the wastewater storage unit. According to this embodiment, the wastewater storage unit is provided with purification means. As the purification method employed, the specific gravity method may be general, but is not necessarily limited thereto. As an example of the purification means, the diaphragm 102 fixedly installed above the wastewater storage part primarily filters wastewater falling directly from the drain pipe. Wastewater is directed to the wastewater storage portion through the outlet 64 located above the diaphragm. Dust in the remaining waste water accumulates at the bottom of the waste water reservoir. Here, an auxiliary sorting means such as a wire mesh 66 may be employed as the outlet.

The waste water storage unit is provided with a purification water outlet 68 on the middle side wall so that the secondary purified water can be discharged. According to an embodiment of the present invention, the waste water storage unit may be provided with a circulation pump (not shown) connected to the purification water outlet 68 so that the purified water may be supplied to the water injection port of the dust collector again.

According to another embodiment of the present invention, air may be introduced into each dust collecting container together with water. It may be used to lower the temperature of the harmful gas of high heat, and sometimes may be used as a means to assist the rise of the harmful gas. According to the present embodiment, a pair of filters 12a and 12b are installed in one dust collector 8a or 8b and are spaced apart from each other, as shown in the figure, and the air injection holes 18 are vertically disposed in the space between the filter and the filter. Is installed. The air injection port 18 is connected to the air supply pipe 28, the dust collector can be supplied with air from the external blowing means through this. The blowing means may be by the blower 6 shown, or may be by a separate compressor (not shown) or the like.

The dust collector described above can be applied to the incinerator 30 as shown in the schematic diagram of FIG. 2 and the schematic perspective view of FIG. 4. That is, the incinerator 30 primarily uses combustion gas including a main combustion chamber 32, a reburn chamber 34 for burning unburned gas, etc. in the main combustion chamber, a large amount of dust discharged through an outlet of the reburn chamber, and the like. Cyclone 36 for purifying, and an air supply unit such as a blower 6 for supplying air to each combustion chamber. Since the cyclone 36 is widely used in the industry as a dust collecting means for removing dust by using the specific gravity difference between gas and dust, its detailed description is omitted.

The main combustion chamber includes a waste inlet for injecting waste (see FIG. 4), an ignition burner, an air injector (or nozzle), and a combustion product (gas) outlet. The combustion gas outlet 33 (see Fig. 3) of the main combustion chamber is connected to the reburn chamber. According to the present invention, air is forcibly supplied to the reburn chamber to increase the combustion efficiency.

The characteristic part of a combustion chamber is demonstrated with reference to FIG. 3 is a configuration diagram of a combustion chamber. The side wall of the main combustion chamber 32 may be constructed by a refractory brick to maintain fire resistance, but the present invention employs a water cooling type by a cooling water jacket or an air cooling type using a blower. Air spray nozzles 38 are installed in various places of the side walls. According to the present invention, the bottom bottom portion 32a of the main combustion chamber has an uneven shape. Each uneven part 32b is also provided with a plurality of air spray nozzles 38 '. This shape characteristic is to increase the combustion efficiency by increasing the contact surface area between the inner surface of the main combustion chamber and the waste. The supply pipe for supplying air to the air injection nozzle in each combustion chamber is abbreviate | omitted.

The gas generated in the main combustion chamber is directly introduced into the reburn chamber 34. According to this embodiment, the reburn chamber 34 has the shape of a flow path 80. The flow path 80 can double its function, for example, by using a circular pipe having an inner diameter of about 300 mm. That is, the combustion gas exiting through the narrow passage is burned again by the ignition burner 40 mounted to the rear of the passage. This structure is intended to increase the combustion efficiency by increasing the density of the gas discharged from the main combustion chamber.

The ceiling of the main combustion chamber 32 is rounded in an arc shape, in order to reduce the amount of gas remaining and to facilitate the discharge of the combustion gas. In the flat bottom of the main combustion chamber, the re-passing hole 76 is formed tightly to allow the combustion material to escape, and the back receiving space 78 is provided below the bottom.

According to the present invention, each combustion chamber may be of a double water-cooled jacket type, for which the cooling water pipe should be piped to the side wall of the combustion chamber.

According to this embodiment, one blower 6 is configured to supply air to the main combustion chamber, the reburn chamber and the dust collector, respectively, but two or more blowers may be provided to individually and efficiently supply air. .

FIG. 5 shows another embodiment of the present invention, and shows a side configuration of a main combustion chamber of an incinerator in which a regeneration device using high heat of the main combustion chamber is further installed. That is, the molten pipe 42 elongated in the longitudinal direction of the main combustion chamber penetrates. The screw 43 is rotatably installed in the melt pipe in the longitudinal direction thereof. The inlet of the melting pipe 42 may be introduced into the waste plastic waste material in pieces, the injected waste material is discharged toward the outlet 46 in the molten or molded state by the high heat of the combustion chamber. The outlet 46 may be configured to be formed in the shape of a rod elongated to the waste material. That is, the waste material is drawn through the molten tube and rolled to have a desired shape. To this end, the mold 48 may be installed in the discharge port of the melt tube to be replaced. Rotating means for rotating the screw is not shown, but may be a combination of a motor and a transmission means and will be able to be implemented by those skilled in the art.

Those skilled in the art will be able to make various changes and modifications without departing from the spirit of the present invention with reference to the disclosure. For example, it may be possible to change the method for spraying or supplying air or water. Alternatively, the wastewater purification device used in the dust collector may be replaced by another type, and additional devices may be installed in addition to the disclosed items.

In addition, the water supplied to the dust collector may be passed through the combustion chamber to be more evaporated. This may be useful when the temperature of the harmful gas entering the dust collector is relatively low.

In addition, an automatic control system may be employed to automatically control the supply of air, the supply of cooling water, and the like based on information such as the temperature of the combustion chamber.

According to an embodiment of the present invention, there is provided a wet collecting device of an improved form and an incinerator using the same. As a result, various harmful substances contained in harmful gases are precisely and safely removed or collected. According to another embodiment of the present invention, water or any other substance discharged from the dust collector or the incinerator will minimize the content of compounds harmful to the environment.

According to another embodiment of the present invention, it is more advantageous to have a multifunctional, such as recycling the thermoplastic material to make a useful recycled article. In addition, according to the structural improvement of the main combustion chamber has the effect that the combustion heat efficiency is increased.

Claims (9)

A gas inlet (4) installed below the high temperature harmful gas containing dust and other harmful compounds to be introduced thereinto and elevated therein; It is installed in the passage that the harmful gas introduced through the gas inlet, the heat-resistant filter 12 is installed over the entire passage, the upper portion of the filter to spray the water in the shower type on the front of the filter. One or more continuously installed dust collectors 8 provided with a water injection port 14 so as to be provided; A stack 10 through which the purified combustion gas is discharged after the dust collecting container; A water supply unit capable of supplying water through the water injection port; Dust collecting device, characterized in that it comprises a waste water storage unit 24 is installed in the bottom of the gas inlet so that the water in the state of collecting the harmful substances such as dust falling down. The dust collecting device according to claim 1, wherein the filter (12) is formed by compressing a thin stainless steel wire or a chip thereof in a thread shape to a predetermined thickness to the width of the passage. 2. The filter (12) according to claim 1, wherein the filter (12) is formed by compressing a thin stainless steel wire or a chip thereof in a thread shape to a predetermined thickness to the width of the passage. Dust collector is installed spaced apart from each other in the one dust collector (8) to be a pair, between which is supplied air from the outside through the air injection port (18). According to claim 1, Purification apparatus for purifying the waste water stored in the waste water storage unit 24; Dust collecting device, characterized in that it further comprises a circulation pump for supplying the water passed through the purification device to the water supply again. A main combustion chamber 32 provided with a waste inlet, a burner, a combustion chamber air nozzle and a combustion product outlet; A reburn chamber (34) for re-burning the gas flowing out of the main combustion chamber; A blower (6) for supplying air to the combustion chamber air nozzle; A cyclone (36) for firstly purifying the combustion gas passing through the reburn chamber; It is for trapping or removing fine dust and other harmful compounds contained in the combustion gas passing through the cyclone; A gas inlet 4 connected to an outlet of the cyclone; It is installed in the passage that the harmful gas introduced through the gas inlet, the heat-resistant filter 12 is installed over the entire passage, the upper portion of the filter to spray the water in the shower type on the front of the filter. One or more continuously installed dust collectors 8 provided with a water injection port 14 to be provided; A stack 10 through which the purified combustion gas is discharged after the dust collecting container; A water supply unit capable of supplying water through the water injection port; Dust collecting device, characterized in that it comprises a waste water storage unit 24 is installed in the bottom of the gas inlet so that the water in the state of collecting the harmful substances such as dust falling down; Incinerator comprising a. The incinerator according to claim 5, wherein an uneven portion is formed in the bottom 32a of the main combustion chamber, and a combustion chamber air nozzle 38 'is installed in the uneven portion for supplying air to the main combustion chamber. . 6. The reburn chamber (34) is shaped like a cylindrical passage (80) so that the combustion gas passing through the main combustion chamber (32) can be efficiently burned in a dense state, and the ignition burner behind the passage. Incinerator, characterized in that 40 is installed. The method of claim 5, wherein the plurality of air injection holes 18 are installed inside the dust collector to supply air to the dust collector (8), the air injection port is characterized in that the air is supplied from the blower through a pipe Incinerator 6. An elongated melt tube (42) according to claim 5, further comprising: an elongated molten tube (42) passing through an inner upper side of said main combustion chamber (32 '); A screw (43) rotatably installed in the longitudinal direction in the melt tube; The thermoplastic waste material introduced through the inlet of the melting pipe 42 is melted while passing through the main combustion chamber, and then the screw can be processed into a desired shape by the outlet 46 and the mold 48 connected thereto. An incinerator further comprising a plastic regeneration device composed of rotating means for rotating.