Wet dust collector, wet dust collection method, and dust removal device

Abstract

To provide a wet-type dust collection device, a wet-type dust collection method, and a powder dust removal device with enhanced powder dust removal performance and sterilization performance.SOLUTION: A wet-type dust collection device includes: an ozone water generation device 2, a first mist sprayer 3, a second mist sprayer 4a, a second mist sprayer 4b, and a tube group type scrubber 5. The first mist sprayer 3, the second mist sprayer 4a, the second mist sprayer 4b, and the tube group type scrubber 5 are provided inside a wet-type dust collection chamber 1a. The ozone water generation device 2 is connected to the wet-type dust collection chamber 1a through a hose 2b, and an ejection part 2a is provided at the tip of the hose 2b. In the ozone water generation device 2, ozone is ejected into the water from the ejection part 2a at the tip through the hose 2b so that the ozone is dissolved into the water, and ozone water 21 is generated. Outside air is sucked from a suction port 71 by the actuation of a blower, and after dust removal and sterilization, the air is discharged from the exhaust port 72.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a technique for removing dust such as volcanic ash, iron powder, oil mist, pollen, and viruses contained in a gas or performing disinfection.

Background Art

[0002] As a technique for removing dust from a gas containing dust, the present inventors have already proposed a dust removal device including a gravitational dust collection means, a wet dust collection means, and an intake means (see Patent Document 1). The dust removal device of Patent Document 1 is operated by an intake means provided on the exhaust side of the wet dust collection means. The gravitational dust collection means causes dust to fall by gravity from a gas containing dust, and further, in the wet dust collection means, the gas is passed through a liquid to remove the dust in the gas. According to this, the dust removal performance can be maintained for a long period, maintenance is easy, and it can be used at a low cost. In the dust removal device of Patent Document 1, an example in which a virus disinfectant is contained in the liquid provided in the wet dust collection means is disclosed. However, in recent years, the need to further improve the disinfection performance has been increasing.

[0003] On the other hand, a wet dust collector that performs two-stage gas-liquid mixing treatment is known (see Patent Document 2). The wet dust collector of Patent Document 2 performs coarse dust treatment on a gas containing dust by a cyclone section, then contacts it with mist by a water spray duct, and further blows the dust onto the water surface by a secondary gas-liquid mixing mechanism to improve the dust collection efficiency. However, there is a problem that the two-stage gas-liquid mixing treatment is not sufficient to improve the disinfection performance. The wet dust collector of Patent Document 2 is originally intended for removing dust and is not intended to improve the disinfection performance, so it can be said that sufficient consideration has not been given to improving the disinfection performance.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] In view of these circumstances, the present invention aims to provide a wet dust collector, a wet dust collection method, and a dust removal device with improved dust removal performance and sterilization performance. [Means for solving the problem]

[0006] To solve the above problems, the wet dust collector of the present invention is a device that removes dust from a gas by introducing a gas containing dust and passing it through a liquid, and comprises: a scrubber water generating means that supplies an oxidizing agent or a reducing agent to the liquid in the device and generates scrubber water containing the oxidizing agent or a reducing agent; a first mist spraying means that sucks up the scrubber water, turns it into a mist, and sprays it onto the gas before it passes through the liquid; and a second mist spraying means that sucks up the scrubber water, turns it into a mist, and sprays it onto the gas after it has passed through the liquid. By incorporating a scrubber water generation means, the disinfecting performance of the liquid through which the gas passes can be enhanced. By incorporating a first mist spraying means, mist adheres to dust particles in the gas, enabling dust removal and disinfection. Furthermore, the adhesion of mist to dust particles makes dust removal or disinfection by passing the gas through the liquid more effective. By incorporating a second mist spraying means, mist can be further applied to fine dust particles that were not captured or disinfected by passing the gas through the liquid, enabling dust removal and disinfection. The oxidizing or reducing agents include a wide range of known oxidizing and reducing agents, and those that exist as gases, liquids, or solids at room temperature can be used. For example, ozone is an excellent oxidizing agent for sterilization and deodorization, while metal ions such as gold, silver, copper, platinum, and lead have strong sterilizing properties and are reducing agents.

[0007] The wet dust collector of the present invention preferably further comprises a removal means for removing oxidizing or reducing agents contained in the gas after dust removal, downstream of the second mist spraying means. By providing the removal means, the dust-removed or sterilized gas can be discharged to the outside as a more safe gas. A wide range of known removal devices can be applied as the removal means. For example, when ozone is used as an oxidizing agent, an ozone removal device using activated carbon decomposition, catalytic methods, thermal decomposition, or chemical washing methods is preferably used.

[0008] In the wet dust collector of the present invention, it is preferable that an ammonia adsorbent made of a Prussian blue analog is placed inside the wet dust collector to remove ammonia from the gas. This improves the deodorizing effect. The location where the ammonia adsorbent is placed is inside the wet dust collector, but it does not necessarily have to be placed inside the wet dust collection chamber, which is the main body of the wet dust collector, and may be placed outside the wet dust collection chamber. Furthermore, if a gas-liquid separation means described later is provided, it is preferable that the ammonia adsorbent be placed downstream of the gas-liquid separation means. By placing it downstream of the gas-liquid separation means, it is possible to prevent liquid from adhering to the ammonia adsorbent, and the deodorizing effect is further improved.

[0009] In the wet dust collector of the present invention, it is preferable that a gas-liquid separation means is provided downstream of the second mist spraying means. Since the gas from which dust has been removed by the wet dust collector contains a small amount of moisture, the provision of a gas-liquid separation means makes it possible to remove the moisture from the gas. The gas-liquid separation means may have a mechanism that causes the liquid to fall using multiple louvers, or a mechanism that separates the gas and liquid by centrifugal force. It may also have a mechanism that removes moisture from the gas by causing it to meander up and down. It is preferable that the removed liquid is returned to the liquid in the device.

[0010] In the wet dust collector of the present invention, it is preferable that a plurality of partitions are provided at the bottom of the device in which the liquid is contained. By providing partitions, dust accumulates in the gaps formed by adjacent partitions, preventing the dust accumulated at the bottom from being blown up. As a result, dust is less likely to mix with the liquid sucked up by the first or second mist spraying means, and clogging of pipes and the like can be prevented.

[0011] In the wet dust collector of the present invention, the oxidizing agent or reducing agent broadly includes known oxidizing agents and reducing agents, but is preferably a known substance with high antibacterial performance, and more preferably the oxidizing agent is ozone gas and the scrubber water is ozonated water.

[0012] The dust removal device of the present invention is characterized in that a gravity-type dust collector is provided in front of any of the wet-type dust collectors described above. By providing a gravity-type dust collector, it becomes possible to remove relatively large dust particles in advance with the gravity-type dust collector before dust removal or disinfection by the wet-type dust collector, thereby reducing the deterioration of the performance of the liquid provided in the wet-type dust collector. The gravity-type dust collector may be configured to drop dust using multiple louvers (blades), or it may remove dust from the gas by making the gas meander up and down. The gravity-type dust collector is operated by the same gas introduction means as the gas introduction means that operates the wet-type dust collector.

[0013] The present invention provides a wet dust collection method for removing dust from a gas by introducing a gas containing dust and passing it through a liquid, comprising the following steps 1) to 3). 1) A scrubber water generation step in which an oxidizing agent or reducing agent is supplied to the liquid in the apparatus to generate scrubber water containing the oxidizing agent or reducing agent. 2) A first mist spraying step in which water is drawn up from the scrubber, turned into a mist, and sprayed onto the gas before it is passed through the liquid. 3) A second mist spraying step in which the scrubber water is drawn up, turned into a mist, and sprayed onto the gas that has passed through the liquid. [Effects of the Invention]

[0014] According to the wet dust collector, wet dust collection method, and dust removal device of the present invention, there is an effect that the dust removal performance and sterilization performance are enhanced.

Brief Description of the Drawings

[0015] [Figure 1] Functional block diagram of the wet dust collector of Example 1 [Figure 2] Schematic image diagram of the wet dust collector of Example 1 [Figure 3] Schematic flowchart of the wet dust collection method of Example 1 [Figure 4] Explanatory diagram of the wet dust collector of Example 1 [Figure 5] Functional block diagram of the wet dust collector of Example 2 [Figure 6] Schematic image diagram of the wet dust collector of Example 2 [Figure 7] Schematic image diagram of the wet dust collector of Example 3 [Figure 8] Image diagram of the gravity dust collector of Example 4 [Figure 9] Image diagram of the gas-liquid separator of Example 5 [Figure 10] Schematic image diagram of the wet dust collector of Example 6

Modes for Carrying Out the Invention

[0016] Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. Note that the scope of the present invention is not limited to the following examples and illustrated examples, and numerous changes and modifications are possible.

Examples

[0017] FIG. 1 shows a functional block diagram of the wet dust collector of Example 1. As shown in FIG. 1, the wet dust collector 100 includes a scrubber water generation means 200, a first mist spraying means 300, a second mist spraying means 400, and a bubbling means 500. Note that the wet dust collector 100 operates by generating a negative pressure in the bubbling means 500 by suction or compression by a gas introduction means (not shown). The scrubber water generating means 200 supplies an oxidizing agent or reducing agent to the liquid in the apparatus to generate scrubber water containing the oxidizing agent or reducing agent. The first mist spraying means 300 draws up the scrubber water generated by the scrubber water generating means 200, turns it into a mist, and sprays it onto the gas before it passes through the liquid. The second mist spraying means 400 draws up the scrubber water generated by the scrubber water generating means 200, turns it into a mist, and sprays it onto the gas after it has passed through the liquid. The bubbling means 500 removes dust from the gas by passing it through the liquid.

[0018] Figure 2 shows a schematic diagram of the wet dust collector of Example 1. As shown in Figure 2, the wet dust collector 1 consists of an ozone water generator 2, a first mist sprayer 3, second mist sprayers (4a, 4b), and a tube-type scrubber 5. The first mist sprayer 3 corresponds to the first mist spraying means 300 in the wet dust collector 100, and the second mist sprayers (4a, 4b) correspond to the second mist spraying means 400. The tube-type scrubber 5 corresponds to the bubbling means 500, and the ozone water generator 2 corresponds to the scrubber water generating means 200. The first mist sprayer 3, the second mist sprayers (4a, 4b), and the tube-type scrubber 5 are installed inside the wet dust collection chamber 1a. The ozone water generator 2 is connected to the wet dust collection chamber 1a via a hose 2b, and a nozzle 2a is provided at the end of the hose 2b. The ozone water generator 2 sprays ozone into the water from the nozzle 2a at the end of the hose 2b, causing the ozone to dissolve in the water and generating ozone water 21. The wet dust collector 1 uses a blower (not shown) to draw in outside air from the intake port 71, remove dust and disinfect it, and then discharge the air from the exhaust port 72. Although not shown in the diagram, the wet dust collector 1 may be installed on a trolley or the like, and may have a movable structure.

[0019] The wet dust collection chamber 1a contains ozonated water 21. The tubular scrubber 5 consists of piping 50 and a gas inlet pipe 51, and the gas inlet pipe 51 of the tubular scrubber 5 is inserted into the liquid ozonated water 21. The first mist sprayer 3 draws up ozonated water 21 contained in the wet dust collection chamber 1a through piping 6a, turns the ozonated water 21 into a mist, and sprays it onto the gas 8a introduced from the air intake port 71. Similarly, the second mist sprayer 4a draws up ozonated water 21 contained in the wet dust collection chamber 1a through piping 6b, and the second mist sprayer 4b draws up ozonated water 21 contained in the wet dust collection chamber 1a through piping 6c, turns the ozonated water 21 into a mist, and sprays it onto the gas 8c that has been dust-removed by the tube group scrubber 5.

[0020] (Regarding ozonated water generation) Figure 3 shows a schematic flow diagram of the wet dust collection method of Example 1. As shown in Figure 3, first, an oxidizing agent or reducing agent is supplied to the liquid in the apparatus to generate scrubber water containing the oxidizing agent or reducing agent (step S01). In this example, ozone is used as the oxidizing agent, and ozonated water 21 is generated as scrubber water. Specifically, ozone is supplied from the ozonated water generator 2 via the hose 2b, and ozone is ejected from the ejection part 2a into the liquid contained in the wet dust collection chamber 1a, thereby dissolving ozone in the water and generating ozonated water 21. The ozonated water 21 is used for spraying mist 20 by the first mist sprayer 3, spraying mist 20 by the second mist sprayers (4a, 4b), and bubbling by the tube group type scrubber 5.

[0021] (Regarding the first mist spray) Next, as shown in Figure 3, the scrubber water is drawn up, turned into a mist, and sprayed onto the gas before it passes through the liquid (step S02). Figure 4 shows an explanatory diagram of the wet dust collector of Example 1. As shown in Figure 4, the first mist sprayer 3 draws up the ozonated water 21 contained in the wet dust collection chamber 1a through the piping 6a shown in Figure 2, turns the ozonated water 21 into a mist, and sprays it onto the dust-containing gas 8a introduced into the piping 50 from the air intake 71. As shown in Figure 4, the mist 20 is sprayed in opposition to the direction of travel of the gas 8a.

[0022] The dust-containing gas 8a introduced from the intake port 71 receives mist 20 from the first mist sprayer 3, and the mist 20 adheres to the dust, removing and disinfecting it. Furthermore, the gas 8a becomes more easily removed or disinfected by the tube-type scrubber 5 and the second mist sprayers (4a, 4b), and is sent to the gas introduction pipe 51. Thus, the first mist sprayer 3 not only possesses dust removal and disinfection capabilities itself, but also plays a role in making the dust removal or disinfection by the tube-type scrubber 5 installed further down the line more effective.

[0023] (Regarding dust removal or disinfection using a tubular scrubber) After the first mist spray, as shown in Figure 3, dust in the gas is removed by passing the gas through the liquid (step S03). As shown in Figure 4, the tube-type scrubber 5 has a mechanism that branches the gas sent from the piping 50 into multiple gas inlet pipes 51. Since the tips of the gas inlet pipes 51 are inserted into the ozonated water 21, when the wet dust collector 1 is activated, negative pressure is created inside the wet dust collection chamber 1a, and gas 8b is ejected from the tips of the gas inlet pipes 51 into the ozonated water 21. The ejected gas 8b becomes bubbles 80, and upon contact with the ozonated water 21, the fine dust contained in the bubbles 80 is adsorbed by the ozonated water 21, and the sterilizing effect of the ozonated water 21 also takes effect.

[0024] The dust adsorbed by the ozonated water 21 accumulates at the bottom of the wet dust collection chamber 1a, and the dust is removed by a discharge mechanism (not shown). Multiple partitions 52 are provided at the bottom of the wet dust collection chamber 1a, and dust 52b accumulates in the gaps 52a formed by adjacent partitions 52, preventing the dust 52b accumulated at the bottom from being stirred up.

[0025] Since gas 8b has already been sprayed with mist 20 once by the first mist sprayer 3, when it is ejected into the ozonated water 21 from the tip of the gas introduction pipe 51, the dust to which the mist 20 has adhered is more likely to come into contact with the ozonated water 21. This further improves the dust removal or sterilization performance of the tube group type scrubber 5. Furthermore, if the bubbles 80 are too large, the ozonated water 21 will not adequately capture the dust, so it is necessary to reduce the size of the bubbles to a certain extent. For this reason, a surfactant is added to the ozonated water 21 to increase its viscosity. In addition, although not shown in the diagram, an ammonia adsorbent made of a Prussian blue analog may be placed in the wet dust collection chamber 1a in which the ozonated water 21 is contained, to remove ammonia from the gas. This can improve the deodorizing and antibacterial effect.

[0026] (Regarding the second mist spraying) As shown in Figure 3, the scrubber water is drawn up, turned into a mist, and sprayed onto the gas after it has passed through the liquid (step S04). As shown in Figure 4, when the bubbles 80 that have risen to the surface of the ozonated water 21 burst, they become dust-free and sterilized gas 8c. The dust-free gas 8c, removed by the tube-type scrubber 5, receives mist 20 sprayed from the second mist sprayers (4a, 4b). The mist 20 adheres to any remaining dust in the gas 8c, further dust removal and sterilization occur, resulting in the gas 8d shown in Figure 2. As shown in Figure 4, the mist 20 is sprayed in opposition to the direction of travel of the gas 8c. The dust-free and sterilized gas 8d is discharged from the exhaust port 72 shown in Figure 2.

[0027] The spraying of mist 20 by the second mist sprayers (4a, 4b) is performed for the purpose of removing or disinfecting extremely fine dust and viruses that were not captured by the first mist sprayer 3 and the tube-type scrubber 5, since the mist 20 has already been sprayed once by the first mist sprayer 3 and further bubbling is performed by the tube-type scrubber 5. For this reason, the mist 20 sprayed by the second mist sprayers (4a, 4b) may consist of smaller particles than the mist 20 sprayed by the first mist sprayer 3. Conversely, in the case of a configuration that does not have a gas-liquid separation means, such as the wet dust collector 1, larger particles than the mist 20 sprayed by the first mist sprayer 3 may be sprayed in order to reduce the concentration of ozonated water 21 contained in the gas 8d discharged from the exhaust port 72. In this embodiment, the first mist sprayer 3 is installed in one location, and the second mist sprayers (4a, 4b) are installed in a total of two locations, but the location and number of mist sprayers are not limited to this.

[0028] Thus, in the wet dust collection apparatus and wet dust collection method of this embodiment, both the first mist sprayer 3 and the second mist sprayers (4a, 4b) use the same ozonated water 21 to spray mist 20 into the gas introduced into the wet dust collection chamber 1a. However, the first mist sprayer 3 aims to make dust removal or disinfection by the subsequent tube-type scrubber 5 more effective and efficient, in addition to its own dust removal and disinfection, whereas the second mist sprayers (4a, 4b) aim to remove dust and disinfect particles, viruses, etc. that are not collected by the dust removal or disinfection by the first mist sprayer 3 and the tube-type scrubber 5. In other words, the first mist sprayer 3 and the second mist sprayers (4a, 4b) each have their own unique purposes and effects, and by arranging them in the order of the first mist sprayer 3, the tube-type scrubber 5, and the second mist sprayers (4a, 4b), the dust removal or sterilization performance is improved.

[0029] Furthermore, the injection pressure and spray volume of the mist 20 sprayed by the first mist sprayer 3 or the second mist sprayer (4a, 4b) are adjusted according to the output of the gas introduction means, such as a blower, used. In other words, if the output of the gas introduction means is increased, the injection pressure of the mist 20 is increased or the spray volume is increased to prevent a reduction in the dust removal and sterilization effect. In addition to the size of the mist particles, the spray pressure and spray volume of the mist 20 may also be set differently between the first mist sprayer 3 and the second mist sprayers (4a, 4b). For example, by setting the spray pressure and spray volume of the mist 20 sprayed by the first mist sprayer 3 to be higher and larger than that of the mist 20 sprayed by the second mist sprayers (4a, 4b), it is possible to effectively adhere the mist 20 to the dust contained in the gas 8a. [Examples]

[0030] Figure 5 shows a functional block diagram of the wet dust collector of Example 2. As shown in Figure 5, the wet dust collector 101 comprises a scrubber water generating means 200, a first mist spraying means 300, a second mist spraying means 400, a bubbling means 500, a gas introduction means 700, a removal means 900, and a gas-liquid separation means. The wet dust collector 101 operates when negative pressure is generated in the bubbling means 500 by suction or compression by the gas introduction means 700. The removal means 900 removes oxidizing agents or reducing agents contained in the gas after dust removal. The gas-liquid separation means 1100 is provided between the second mist spraying means 400 and the removal means 900 and separates the liquid from the gas. The scrubber water generating means 200, the first mist spraying means 300, the second mist spraying means 400, and the bubbling means 500 are the same as those in the wet dust collector 100 of Example 1.

[0031] Figure 6 shows a schematic diagram of the wet dust collector of Example 2. As shown in Figure 6, the wet dust collector 10 consists of an ozone water generator 2, a first mist sprayer 3, second mist sprayers (4a, 4b), a tube-type scrubber 5, a blower 7, an ozone removal filter 9, and a gas-liquid separator 11. The blower 7 corresponds to the gas introduction means 700 in the wet dust collector 101, the ozone removal filter 9 corresponds to the removal means 900, and the gas-liquid separator 11 corresponds to the gas-liquid separation means 1100. The wet dust collector 10 is structured to draw in external gas 8a from the intake port 71 by the operation of the blower 7, perform dust removal and sterilization, separate the liquid from the gas by the gas-liquid separator 11, remove ozone by the ozone removal filter 9, and then discharge gas 8f from the exhaust port 72.

[0032] The structure of the gas-liquid separator 11 will now be explained. As shown in Figure 6, the gas 8d, which has been dust-removed and sterilized by ozonated water 21, is sent to the gas-liquid separator 11. Since the gas 8d, which has passed through the ozonated water 21 and been sprayed with mist 20, contains a small amount of moisture, the gas and liquid are separated using the gas-liquid separator 11. The gas-liquid separator 11 is equipped with multiple blades 11a, all of which are arranged with a slope from the upper left to the lower right. Because the blades 11a are arranged with a slope from the upper left to the lower right, the gas 8d that flows into the gas-liquid separator 11 is guided downwards.

[0033] Furthermore, because multiple blades 11a are provided, the incoming gas 8d does not fully ride the airflow whose direction is changed by the blades 11a, but instead collides with the left side of the blades 11a due to its own inertia. As a result, the ozonated water 21 particles contained in the gas 8d are more likely to fall downwards. The gas 8d guided downwards contains ozonated water 21 particles. These ozonated water 21 particles settle due to inertial collision and gravity, and are guided downwards, where the ozonated water 21 is recovered in the recovery section 11b. The gas 8e, from which the ozonated water 21 particles have been separated from the gas 8d, undergoes ozone removal by the ozone removal filter 9 before being discharged from the exhaust port 72. The ozonated water 21 separated from the gas 8d by the gas-liquid separator 11 is returned to the wet dust collection chamber 1a via the piping 6d. [Examples]

[0034] Figure 7 shows a schematic diagram of the dust removal device of Example 3. As shown in Figure 7, the wet dust collector 10a consists of an ozone water generator 2, a first mist sprayer 3, second mist sprayers (4a, 4b), a tube-type scrubber 5, a blower 7, an ozone removal filter 9, and a gas-liquid separator 110. The gas 8d, which has been dust-removed and sterilized by the ozone water 21, is sent to the gas-liquid separator 110. Since the gas 8d, which has passed through the ozone water 21 and been sprayed with mist 20, contains a small amount of moisture, the gas and liquid are separated using the gas-liquid separator 110. Although not shown in detail, the gas-liquid separator 110 is equipped with a mechanism that swirls the gas 8d flowing in from the piping 110a and uses the centrifugal force generated by this swirling to separate the liquid from the gas 8d. The liquid separated from the gas 8d by the gas-liquid separator 110 is returned to the wet dust collection chamber 1a through the piping 6d. The gas 8e from which the liquid has been separated passes through the piping 110b, undergoes ozone removal by the ozone removal filter 9, and is discharged from the exhaust port 72 as dust-free and sterilized gas 8f. [Examples]

[0035] Example 4 describes an example in which a gravity-type dust collector is installed in front of a wet-type dust collector (1,10,10a), etc. Figure 8 shows an image diagram of the gravity-type dust collector of Example 4. As shown in Figure 8, the gravity-type dust collector 12 consists of a first gravity-type dust collection chamber 12a and a second gravity-type dust collection chamber 12b, separated by a partition wall 13b. Both the first gravity-type dust collection chamber 12a and the second gravity-type dust collection chamber 12b are structured to purify the gas by guiding the gas flowing in from the top of the chamber downwards, causing the dust to fall due to gravity, and then guiding the gas from the bottom of the chamber upwards. Specifically, in the first gravity-type dust collection chamber 12a, gas is guided by partitions (13a, 13b) and an inclined plate 14a, and dust is made to fall by ejecting gas 8a at high pressure downward from the narrow section 16a formed by partitions 13a and the inclined plate 14a. Similarly, in the second gravity-type dust collection chamber 12b, gas 8g is guided by partitions 13b and an inclined plate 14b, and dust is made to fall by ejecting gas 8g at high pressure downward from the narrow section 16b formed by partitions 13b and the inclined plate 14b. The gas 8h purified in the second gravity-type dust collection chamber 12b is sent to the piping 50. The fallen dust 17 is removed from the openable / closable dust outlet 15.

[0036] The wet dust collectors (1,10,10a) described in Examples 1-3 can collect fine dust, but when the collected dust accumulates and the collection efficiency decreases, it is necessary to replace the ozonated water 21 itself to improve the collection efficiency, which is costly and time-consuming. In contrast, when a gravity dust collector 12 is provided in front of it, the gravity dust collector 12 can remove more than 90% of the dust contained in the gas 8a before sending the gas 8h to the wet dust collector (1,10,10a). Furthermore, when the collected dust 17 accumulates in the gravity dust collector 12, it is only necessary to remove the accumulated dust from the dust outlet 15, which has the advantage of being relatively cost-effective and time-efficient. [Examples]

[0037] The gas-liquid separator provided in the wet dust collector of the present invention is not limited to the configuration of the gas-liquid separators (11, 110) shown in Examples 2 and 3. Figure 9 shows an image diagram of the gas-liquid separator of Example 5. As shown in Figure 9, the gas-liquid separator 111 of Example 5 consists of a first gas-liquid separation chamber 111a and a second gas-liquid separation chamber 111b, both of which are structured to guide gas flowing in from the top of the chamber downwards and separate the gas and liquid by gravity and centrifugal force. The first gas-liquid separation chamber 111a is provided with an inclined plate 14c, and the second gas-liquid separation chamber 111b is provided with an inclined plate 14d. Furthermore, the first gas-liquid separation chamber 111a and the second gas-liquid separation chamber 111b are separated by a partition wall 13c. The partition wall 13c is bonded without gaps at the lower ends of the first gas-liquid separation chamber 111a and the second gas-liquid separation chamber 111b, but is not bonded to the upper ends of the first gas-liquid separation chamber 111a and the second gas-liquid separation chamber 111b, leaving a gap that serves as a gas flow path. The gas 8d that flows into the first gas-liquid separation chamber 111a is guided downward and centrifuged into gas and liquid by an inclined plate 14c with a V-shaped lower end. The gas 8i, from which the liquid has been separated, is guided into the second gas-liquid separation chamber 111b. The gas 8i that flows into the second gas-liquid separation chamber 111b is similarly guided downward and centrifuged into gas and liquid by an inclined plate 14d with a V-shaped lower end, becoming gas 8e from which the liquid has been separated. [Examples]

[0038] Figure 10 shows a schematic diagram of the wet dust collector of Example 6. As shown in Figure 10, the wet dust collector 10b is configured with an ammonia adsorbent 18 added to the wet dust collector 10 of Example 2. The ammonia adsorbent 18 is made of a Prussian blue analog and removes ammonia from the gas, thereby providing a deodorizing effect. The ammonia adsorbent 18 removes ammonia from the gas 8e after the liquid has been separated from the gas 8d by the gas-liquid separator 11. By placing the ammonia adsorbent 18 downstream of the gas-liquid separator 11, it is possible to prevent liquid from adhering to the ammonia adsorbent 18, thereby improving the deodorizing effect. Therefore, the location where the ammonia adsorbent 18 is placed is not limited to the location shown in Figure 10, and it may be placed, for example, between the ozone removal filter 9 and the blower 7. Thus, the wet dust collector 10a can be suitably used in livestock production sites such as pig farms and poultry farms, as it provides not only dust removal and sterilization effects but also deodorizing effects. [Industrial applicability]

[0039] This invention can be used as an emergency dust removal or disinfection device during disasters such as earthquakes and volcanic eruptions. It can also be used as a disinfection device for viruses such as influenza and as a deodorizing device for ammonia odors in livestock production sites such as pig farms and poultry farms. [Explanation of Symbols]

[0040] 1,10,10a,10b,100,101 Wet type dust collector 1a Wet dust collection room 2. Ozone water generator 2a Spout part 2b Hose 3. First mist sprayer 4a, 4b Second mist sprayer 5-tube scrubber Piping 6a~6d, 50, 110a, 110b 7. Blower 8a~8i Gas 9. Ozone removal filter 11,110,111 Gas-liquid separator 11a blade 11b Recovery section 12 Gravity type dust collector 12a First gravity dust collection chamber 12b Second gravity-type dust collection chamber 13a~13c Bulkhead 14a~14d Inclined plate 15 Dust outlet 16a,16b Narrow part 17,52b Dust 18 Ammonia adsorbent 20 Mist 21 Ozone water 51 Gas inlet tube 52 Partition section 52a Gap 71 Air intake 72 Exhaust vents 80 bubbles 111a First gas-liquid separation chamber 111b Second gas-liquid separation chamber 200 Scrubber water generation means 300 First mist spraying means 400 Second mist spraying means 500 bubbling methods 700 Gas introduction means 900 Removal means 1100 Gas-liquid separation means

Claims

1. In a device that removes dust from a gas by introducing a gas containing dust and passing it through a liquid, A scrubber water generating means that supplies an oxidizing agent or a reducing agent to the liquid in the apparatus and generates scrubber water containing the oxidizing agent or the reducing agent, A first mist spraying means that draws up the scrubber water, turns it into a mist, and sprays it onto the gas before passing it through the liquid, A bubbling means comprising piping and gas inlet pipes, wherein the gas supplied from the piping is branched into a plurality of gas inlet pipes, the tip of each gas inlet pipe is inserted into the liquid, and the gas after misting by the first mist spraying means is passed through the liquid to remove dust from the gas, A second mist spraying means that draws up the scrubber water, turns it into a mist, and sprays it onto the gas after it has passed through the liquid, Multiple partitions provided at the bottom of the apparatus in which the liquid is contained, A wet dust collector characterized by being equipped with the following features.

2. The wet dust collector according to claim 1, further comprising a removal means for removing the oxidizing agent or the reducing agent contained in the gas after dust removal, located downstream of the second mist spraying means.

3. The wet dust collector according to claim 1 or 2, characterized in that an ammonia adsorbent made of a Prussian blue analog is placed inside the wet dust collector to remove ammonia from the gas.

4. A wet dust collector according to any one of claims 1 to 3, characterized in that a gas-liquid separation means is provided downstream of the second mist spraying means.

5. The wet dust collector according to any one of claims 1 to 4, characterized in that the oxidizing agent is ozone gas and the scrubber water is ozonated water.

6. A dust removal device characterized in that a gravity-type dust collector is provided prior to any wet-type dust collector according to claim 1 to 5.

7. In a method for removing dust from a gas by introducing a gas containing dust and passing it through a liquid, A scrubber water generation step involves supplying an oxidizing agent or a reducing agent to the liquid in the apparatus to generate scrubber water containing the oxidizing agent or the reducing agent, A first mist spraying step involves drawing up the scrubber water, turning it into a mist, and spraying it onto the gas before passing it through the liquid. A bubbling step is performed to remove dust from the gas by branching the gas supplied from the piping into a plurality of gas introduction pipes, inserting the tips of the gas introduction pipes into the liquid, and passing the gas after the first mist spraying step through the liquid, A second mist spraying step involves drawing up the scrubber water, turning it into a mist, and spraying it onto the gas that has passed through the liquid. A step of depositing the dust in the gaps formed by a plurality of partitions provided at the bottom of the apparatus in which the liquid is contained, A wet dust collection method characterized by comprising the following:

Images