JPH077724U - Waste air treatment equipment - Google Patents

Abstract

(57) [Summary] [Structure] An intake device 10 capable of sucking the waste gas is provided in the vicinity of the waste gas source where the waste gas is generated. A waste gas introduction pipe 11 having a tapered pipe portion 12 whose diameter is reduced toward the exhaust side in the intake device 10.
Connect. A pressure discharge device (13) capable of forming a high-speed dense air stream is connected to the waste gas introduction pipe (11). A waste gas outlet pipe 130 is connected to the pressure discharge device 13. The open end of the waste gas outlet pipe 130 on the exhaust side is arranged near the bottom of the closed water tank 14. The open end of the waste gas outlet pipe (130) is arranged in water in the water tank (14). [Effect] Air pollution and secondary pollution can be reliably prevented, and the work environment at the work place can be improved. Backflow can be prevented even when strong backwind occurs.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waste gas treatment device that treats waste gas such as harmful gas, steam, and smoke to prevent air pollution.In particular, a high-speed dense air flow is generated by a powerful vacuum pump or blower, The present invention relates to a device for preventing air pollution by inhaling waste gas by an air flow and forcing it into water for purification treatment.

[0002]

[Prior art]

 Conventionally, steam generated in food factories such as manju manufacturing plant, ash dust generated in cement factories, poisonous substances generated in the vicinity of plating furnaces in electronic factories, polyvinyl chloride (PVC) factories and foaming styrene factories and other chemical factories. Protect the health of workers who work in these places where toxic gases containing substances or various waste gases such as smoke (smoke) generated from pots and oils in kitchens of general homes and cafeterias are generated. For this reason, various waste air discharge devices are installed to purify the waste gas and discharge it into the atmosphere.

[0003]

[Problems to be solved by the device]

 However, the conventional waste air discharge device just discharges the waste gas in the room directly to the outside, and as a result, it has a problem that it pollutes the surrounding air and causes secondary pollution.

Further, conventionally, an exhaust fan generally provided as a waste air exhaust device in a kitchen such as a general household or a cafeteria has a large air volume and has a diffusion function and a low-pressure exhaust or intake function. Since high-pressure / high-speed dense exhaust air or intake airflow has not yet been constructed, if strong back wind occurs from the outside during use, the exhaust effect will be reduced, and sufficient exhaust will not be possible, and sometimes the atmosphere from the outside will return to the kitchen. There is a problem that it may occur when entering.

The present invention has been made in view of the above problems, and a high-speed dense airflow is generated by a powerful vacuum pump or blower, and the high-speed dense airflow reliably sucks waste gas into the device without backflowing. Then, it is forcibly pressed into water and purified in water, and then discharged into the atmosphere to reliably prevent air pollution and secondary pollution.It has a simple structure and is suitable for general households and factories. The purpose of the present invention is to provide a highly practical waste gas treatment device that is suitable for use in air conditioning.

[0006]

[Means for Solving the Problems]

 The waste gas treatment device according to the first aspect of the invention is an intake device provided near a waste gas source for generating waste gas and capable of sucking the waste gas, and a diameter reduction connected to the intake device toward an exhaust side. A waste gas introduction pipe having a tapered taper portion and a pressure discharge device connected to the waste gas introduction pipe and capable of forming a high-speed dense airflow, and a waste gas discharge pipe connected to the pressure discharge device The open end on the exhaust side of is disposed in water.

According to a second aspect of the waste gas treatment apparatus of the invention, in the waste gas treatment apparatus of the first aspect, a strainer is arranged in the waste gas outlet pipe.

According to a third aspect of the present invention, there is provided the waste gas treatment device according to the first or second aspect, wherein the intake device is a ventilation guide unit for collecting the waste gas and guiding it to the waste gas introduction pipe. There is something.

A waste air treatment device according to a fourth aspect of the invention is the waste air treatment device according to any one of the first to third aspects, wherein the intake device has an intake blower.

A waste gas treatment device according to a fifth aspect of the present invention is the waste gas treatment device according to any one of the first to fourth aspects, wherein the open end on the exhaust side of the waste gas lead-out pipe is arranged in sewer water in the sewer. It is a thing.

According to a sixth aspect of the waste gas treatment device of the present invention, in the waste gas treatment device according to any one of the first to fifth aspects, the pressure discharge device is a vacuum pump.

According to a seventh aspect of the waste air treatment device of the invention, in the waste air treatment device according to any one of the first to fifth aspects, the pressure discharge device is a blower.

The waste air treatment apparatus according to the invention as defined in claim 8 is the waste air treatment apparatus according to any one of claims 1 to 7, in which a closed type is provided in which an open end on the exhaust side of a waste gas lead-out pipe is arranged near a bottom portion. The water tank is provided, the exhaust side opening end of the waste gas outlet pipe is disposed in the water in the water tank, and the upper portion of the water tank is connected to the sewer.

According to a ninth aspect of the waste air treatment apparatus of the present invention, in the waste air treatment apparatus of the eighth aspect, a water tank is connected to a water tap and a flow rate adjusting outlet pipe, and the flow rate adjusting outlet pipe is connected to the water tank. It is connected to the sewer.

According to the waste air treatment apparatus of the invention as set forth in claim 10, in the waste air treatment apparatus according to claim 8 or 9, the operation of the water faucet connected to the water tank is synchronized with the operation of the pressurized discharge apparatus. It is provided with a tuning means for performing.

The waste air treatment device according to the eleventh aspect of the present invention is the waste air treatment device according to any one of the eighth to tenth aspects, wherein an appropriate amount of a cleaning agent is added to the water supplied from the water tap into the water tank. It is a thing.

[0017]

[Action]

 In the waste gas treatment device according to claim 1, the waste gas generated in the waste gas source is strongly sucked by the high-speed dense airflow generated by the pressure discharge device, and is sucked into the waste gas introduction pipe by the suction device. , The flow velocity is accelerated through a tapered pipe section that is reduced in diameter toward the exhaust side, is pressurized by the pressure discharge device and is further accelerated, and becomes a high-speed dense air collection flow in the waste gas discharge pipe, and waste gas discharge It is injected from the open end on the exhaust side of the pipe, forcibly pressed into water, purified in water, and then discharged to the outside. Therefore, air pollution is surely prevented. Further, since the waste gas is strongly sucked in by the high-speed dense air flow, the waste gas is reliably sucked into the waste gas introduction pipe without backflow even by a strong back wind.

According to the waste air treatment apparatus of the second aspect, in the waste air treatment apparatus of the first aspect, the waste gas is filtered and purified by a strainer.

In the waste air treatment device according to the third aspect, in the waste air treatment device according to the first or second aspect, the exhaust gas is generated in the ventilation guide unit by configuring the intake device with the ventilation guide unit. Since it is collected and guided to the waste gas introduction pipe, it is reliably sucked into the waste gas introduction pipe.

In the waste air treatment device according to claim 4, in the waste air treatment device according to any one of claims 1 to 3, the intake device has an intake blower, so that the exhaust gas is reliably discharged by the intake blower. It is sucked into the waste gas introduction pipe.

According to a fifth aspect of the present invention, in the waste gas treatment apparatus according to any one of the first to fourth aspects, the waste gas is discharged directly into the sewer in the sewer from the exhaust-side opening end of the waste gas outlet pipe. It is forcibly pressed in, purified by sewage treatment, etc., and then discharged to the outside, so air pollution is reliably prevented with a very simple structure.

According to a sixth aspect of the present invention, there is provided the waste gas treatment apparatus according to any one of the first to fifth aspects, wherein the pressurizing and discharging device is a vacuum pump, so that the waste gas outlet pipe has a high-speed dense air flow. Is reliably formed, and the waste gas is surely sucked into the waste gas introduction pipe and reliably forcedly injected into water.

In the waste air treatment apparatus according to claim 7, in the waste air treatment apparatus according to any one of claims 1 to 5, the pressurized discharge device is constituted by a blower, so that the waste gas outlet pipe is provided with a high-speed dense concentrated air flow. Is reliably formed, and the waste gas is surely sucked into the waste gas introduction pipe and reliably forced into the water.

In the waste air treatment apparatus according to the eighth aspect, in the waste air treatment apparatus according to any one of the first to seventh aspects, the waste gas is stored in a closed water tank from an opening end on the exhaust side of the waste gas outlet pipe. It is forcibly injected near the bottom of the water, purified in this water, and then discharged into the sewer from the top of the water tank.

In the waste air treatment device according to claim 9, in the waste air treatment device according to claim 8, a small amount of water is continuously supplied to the water tank by the water tap, and the water is discharged from the discharge pipe for flow rate adjustment. The water in the water tank is exchanged and purified by the overflow of water into the sewer.

In the waste air treatment device according to claim 10, in the waste air treatment device according to claim 8 or 9, the operation of the water faucet connected to the water tank by the synchronizing means is synchronized with the operation of the pressurized discharge device. Therefore, the waste gas treatment can be easily performed.

According to the waste air treatment apparatus of the invention as set forth in claim 11, in the waste air treatment apparatus according to any one of claims 8 to 10, a proper amount of the cleaning agent is added to the water supplied from the water tap into the water tank. As a result, the inside of the water tank and its drainage route are cleaned and maintained in a clean state.

[0028]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, reference numeral 1 denotes a waste air treatment device used in a kitchen of a general household. The waste air treatment device 1 is disposed in the vicinity of a waste air source, for example, in a space above a cooking range 40 in the kitchen. A ventilation guide unit 10 as an air intake device is arranged on the side and above the cooking range 40 so as to cover the cooking range 40. The ventilation guide unit 10 has a substantially L-shaped upper end portion. A letter-shaped waste gas introduction pipe 11 is connected.

Further, as shown in FIG. 2, the ventilation guide unit 10 has a trumpet-shaped top portion 10T which is spread downward and is formed in the upper portion, and a lower end portion of the top portion 10T is used. A rectangular rear guide plate portion 10B is formed on the rear portion located on the back side as viewed from the user, and left and right guide plate portions 10L and 10R are formed on the left and right sides of the rear guide plate portion 10B. A semi-open front guide plate 10F is formed at the front of the guide plates 10L and 10R. The guide plate portions 10B, 10L, 10R, and 10F are arranged so as to cover the side and upper spaces of the cooking range 40, and the cooking range 40 and the pan placed on the cooking range 40. Smoke generated from waste air sources such as cooking tools 30 and steam, and waste gases such as steam can be collected in a wide range and guided into the waste air treatment device 1.

Further, the waste gas introduction pipe 11 is arranged such that its introduction side penetrates the outer wall 2 of the kitchen in a substantially horizontal shape, and its exhaust side is arranged outdoors in a substantially vertical shape. A tapered tube portion 12 for accelerating the flow velocity is formed in the middle portion and is formed in a tapered shape with its diameter reduced downward.

At the lower end of the waste gas introducing pipe 11, a powerful vacuum pump 13 is connected as a pressurizing and discharging device capable of forming a high-speed dense air stream. A pipe 130 is connected, and an open end on the exhaust side of the waste gas outlet pipe 130 is arranged near the bottom of a sealed water tank 14 that stores water such as fresh water. That is, the open end of the exhaust gas outlet pipe 130 on the exhaust side is arranged in the water in the water tank 14.

A water tap 15 is disposed on the upper portion of the water tank 14, a flow control lead-out pipe 17 is connected to a side surface of the water tank 14, and a bottom side of the water tank 14 is connected. A drain plug 16 is provided in the part. Further, the flow rate adjusting outlet pipe 17 is arranged in the sewer 20 such as sanitary sewer.

Next, the operation of this embodiment will be described.

Waste gases such as smoke and steam exhausted from the kitchen cooking stove 40, the cooking utensil 30 and the waste air source such as oil in the cooking utensil 30 are used as guide plates at the bottom of the ventilation guide unit 10. Widely collected and guided by 10B, 10L, 10R, and 10F, the high-speed dense airflow generated by the vacuum pump 13 is sucked into the waste gas introduction pipe 11 via the top 10T. Next, when passing through the tapered pipe portion 12 of the waste gas introduction pipe 11, the flow velocity is accelerated by the structure of which the diameter is reduced toward the lower side of the tapered pipe portion 12, and is pressurized by the vacuum pump 13. Further, the waste gas outlet pipe 130 is further accelerated to form a high-speed dense air stream, which is injected from the open end of the waste gas outlet pipe 130 into the water contained in the water tank 14 and forcedly injected. Next, this waste gas is purified by the water in the water tank 14, and is discharged as purified gas into the sewer 20 from the upper flow rate adjusting outlet pipe 17.

That is, the structure of the lower part of the ventilation guide unit 10 promotes the intake of waste gas, and the vacuum pump 13 capable of forming a high-speed dense air flow and the intake / exhaust by the tapered pipe portion 12 for accelerating the flow velocity. Power increases. For this reason, the waste gas is reliably taken in, and is reliably discharged to the sewer 20 after the purification process, and the waste gas is not directly discharged into the atmosphere without being processed, and air pollution is reliably prevented, and the secondary pollution is prevented. Pollution is surely prevented.

Further, as described above, since the intake / exhaust force is increased by the synergistic effect of the three constituent members of the ventilation guide unit 10, the tapered tube portion 12, and the vacuum pump 13, the waste gas is surely discharged. Even if the air is sucked into the building and the backflow to the kitchen is completely prevented even in the event of strong outdoor winds, cooks working in the kitchen can cook in clean air and maintain their health. It

Further, a small amount of water is continuously supplied to the water tank 14 by the water tap 15, and the purified gas and the water and the floating oil plaque are discharged from the flow rate adjusting outlet pipe 17 by the overflow. By discharging the water into the sewer 20, the water in the water tank 14 can be continuously replaced and the water can be continuously purified.

Although the water supply work with the water supply tap 15 may be performed manually, the operation of the water supply tap 15 is synchronized with the operation of the vacuum pump 13 and a small amount of fresh water is stored in the water tank 14. It is also possible to provide a synchronizing means (not shown) for supplying water and automatically adjust the amount of water discharged to the sewer 20.

Further, in order to facilitate the cleaning of the inside of the water tank 14, a proper amount of a cleaning agent is added to the water supplied from the water tap 15, and the waste gas outlet pipe 130 is formed by the vacuum pump 13 at the time of use. By using the high-speed dense airflow that is generated, that is, by using the water flow injected from the open end of the waste gas outlet pipe 130, the water in the water tank 14 is stirred and convected to automatically wash the inside of the water tank 14, It is also possible to use this convection to discharge the scales and the like floating on the surface of the water to the sewer 20 through the discharge pipe 17 for flow control.

Further, for example, if the upper end of the top 10T of the ventilation guide unit 10 is arranged as high as possible, the same effect as a chimney can be obtained, and even if the ventilation fan is not provided in the ventilation guide unit 10, the ventilation guide unit 10 does not have to be provided. The waste gas can be sufficiently sucked and discharged by the three synergistic effects of 10, the tapered tube portion 12, and the vacuum pump 13. Therefore, the noise of the air blower does not occur, the noise in the kitchen can be reduced to the minimum level, and the kitchen becomes a quiet and clean place as described above, and the cooking environment of the cook Improves and can cook comfortably.

Next, another embodiment will be described with reference to FIG.

Since the main constituent parts of this embodiment are the same as those in FIGS. 1 and 2, the same constituent parts are designated by the same reference numerals and the description thereof will be omitted.

The water tank 14, the water tap 15, the drain plug 16, and the flow rate adjusting outlet pipe 17 shown in FIG. 1 are eliminated, and the open end of the waste gas outlet pipe 130 connected to the vacuum pump 13 is directly connected to the sewer 20 A Inserted in the water.

With such a configuration, the waste gas passes through the ventilation guide unit 10, the waste gas introduction pipe 11, the taper-shaped portion 12, and the vacuum pump 13 and directly enters the water of the sewer 20 from the open end of the waste gas discharge pipe 130. As it is discharged, air pollution is reliably prevented with a very simple structure.

Next, still another embodiment will be described with reference to FIG.

Since the main constituent parts of this embodiment are the same as those in FIG. 3, the same constituent parts are designated by the same reference numerals and the description thereof will be omitted.

A strainer 18 in which a filter material such as a multilayer sea surface, a multilayer filter net or a multilayer fiber paper or cloth is arranged is provided above the open end of the waste gas outlet pipe 130 connected to the vacuum pump 13. is doing.

With such a configuration, when the waste gas passes through the strainer 18, smoke, ash dust, oil dust, and the like in the waste gas are adsorbed by the strainer 18 and filtered, and the waste gas is further purified to the sewer 20. Is discharged to. In addition, the purifying function can be improved by regularly replacing the filter medium to be used.

Next, still another embodiment will be described with reference to FIG.

Since the main constituent parts of this embodiment are the same as those in FIG. 1, the same constituent parts are designated by the same reference numerals, and the description thereof will be omitted.

Unlike FIG. 1, the lower guide plate portions 10B, 10L, 10R and 10F are not provided, and only the top 10A is arranged at a relatively higher position than the cooking utensil 30. Within the ventilation guide top 10A. An intake blower 9 as an intake device having a large air volume and a low pressure is provided. The intake blower 9 can further improve the intake force of the waste gas.

Next, still another embodiment will be described with reference to FIG.

Since the main components of this embodiment are the same as those in FIG. 5, the same symbols are used for the same components and the description thereof will be omitted.

As a pressurizing / discharging device, instead of the powerful vacuum pump 13 shown in FIG. 5, a powerful blower 13A such as a blast having a function of blowing at high pressure or at high speed is provided.

With such a configuration as well, a high-speed concentrated airflow can be formed in the waste gas discharge pipe 130 as in the vacuum pump 13 shown in FIGS. 1 to 4, and the same waste as in the embodiment shown in FIGS. It is possible to achieve the effect of gas intake and exhaust.

Next, still another embodiment will be described with reference to FIG.

Since the main constituent parts of this embodiment are the same as those of FIG. 6, the same constituent parts are designated by the same reference numerals and the description thereof will be omitted.

The top 10A of FIG. 6 is eliminated, and the intake blower 9 is slightly increased to directly install it on a wall or window, and the water tank 14 of FIG. 6 is eliminated, and a waste gas outlet pipe connected to the blower 13A. The open end of 130 is forcibly discharged directly into the water of sewer 20A, which has a water level.

Such a structure requires a treatment of waste gas so that there is no space for installing the top portion 10A of FIG. 6 and the ventilation guide unit 10 shown in FIGS. 1 and 2 and the like. It can be suitably used in a work place, for example, a work place in which a work table or the like is provided. By installing the air blower 9 for intake in accordance with the work place such as each work table, the effect of preventing air pollution can be further improved.

In each of the examples, the temperature of the waste air may be particularly high due to steam being discharged in a food factory that manufactures steamed buns, for example, but the temperature of the waste air is high. In this case, it is preferable that the coil and wiring of the motor such as the vacuum pump 13 and the blower 13A are formed of a heat-resistant material so as to cope with the environment under high temperature and thus have a long life.

Further, in each of the embodiments, the exhaust side of the waste gas introduction pipe 11, the vacuum pump 13, the blower 13A, etc. are all installed outdoors, but they are installed outdoors during actual use. If difficult, each of these components may be placed in a suitable location in the kitchen or indoors.

Further, in each of the embodiments, the vacuum pump 13 and the blower 13A are illustrated as the pressurizing and discharging device, but the present invention is not limited to this, and various other types having the same performance as the vacuum pump 13, the blower 13A, and the like. It is also possible to use the above-mentioned pressurized discharge device, for example, various high-speed / high-pressure discharge devices other than the normal low-pressure discharge device having a large air volume can be used.

[0064]

[Effect of device]

 According to the invention of claim 1, the waste gas generated in the waste air source is strongly sucked by the high-speed dense airflow generated by the pressure discharge device, and is sucked in the waste gas discharge pipe by the suction device, The flow velocity is accelerated through the tapered pipe part, pressurized by the pressure discharge device and further accelerated, and becomes a high-speed dense air flow in the waste gas discharge pipe, and is injected from the open end of the waste gas discharge pipe and forcedly injected into water. After being purified in water and discharged to the outside for treatment, air pollution can be reliably prevented and secondary pollution can be reliably prevented. In addition, the structure is very simple and easy to maintain, so it is suitable for use in ordinary households and factories. Further, even when strong back wind occurs, the waste gas is reliably sucked into the waste gas introduction pipe without flowing back, so that the working environment such as the kitchen or the work place can be improved.

According to the second aspect of the invention, in the first aspect of the invention, the waste gas can be purified by filtering with a strainer.

According to the third aspect of the invention, in the invention of the first or second aspect, since the waste gas is collected and guided in the waste gas outlet pipe by the ventilation guide unit, the waste gas outlet can be reliably discharged. Can inhale into the pipe.

According to the invention as defined in claim 4, in the invention as defined in any one of claims 1 to 3, the waste gas can be reliably sucked into the waste gas outlet pipe by the suction blower.

According to a fifth aspect of the invention, in the invention according to any one of the first to fourth aspects, the waste gas is forcibly press-fitted directly into the sewer in the sewer from the exhaust side opening end of the waste gas outlet pipe. After being purified by sewage treatment, etc., it is discharged to the outside, so air pollution can be reliably prevented with an extremely simple structure.

According to the invention as defined in claim 6, in the invention as defined in any one of claims 1 to 5, since the high-speed dense airflow can be reliably formed by the waste gas outlet pipe by the vacuum pump, the waste gas can be reliably discharged. It can be forcibly pressed into water by sucking air into the gas introduction pipe.

According to the invention as defined in claim 7, in the invention as defined in any one of claims 1 to 5, since the high-speed dense airflow can be reliably formed by the waste gas outlet pipe by the blower, the waste gas can be reliably discharged. It can be forcibly pressed into water by sucking air into the introduction pipe.

According to the invention as defined in claim 8, in the invention as defined in any one of claims 1 to 7, the waste gas is forcedly injected into the water in the hermetically sealed water tank from the open end of the waste gas outlet pipe on the exhaust side. After being purified in this water, it is discharged from the upper part of the water tank into the sewer, so that waste gas treatment can be performed efficiently.

According to a ninth aspect of the invention, in the eighth aspect of the invention, a small amount of water is continuously supplied into the water tank by the water faucet, and the water overflows from the flow control outlet pipe. Then, the water in the water tank can be continuously exchanged and purified by being discharged into the sewer, and the waste gas treatment can be efficiently performed.

According to the invention of claim 10, in the invention of claim 8 or 9, the operation of the water faucet connected to the water tank by the tuning means is synchronized with the operation of the pressurizing and discharging device. Processing can be performed easily.

According to the invention of claim 11, in the invention of any one of claims 8 to 10, the water tank is provided by adding an appropriate amount of a cleaning agent to the water supplied from the water tap into the water tank. The interior and its drainage paths can be cleaned and kept clean.

[Brief description of drawings]

FIG. 1 is an explanatory view of a waste gas treatment device showing an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an explanatory view of a waste gas treatment device showing another embodiment of the present invention.

FIG. 4 is an explanatory view of a waste gas treatment device showing still another embodiment of the present invention.

FIG. 5 is an explanatory view of a waste gas treatment device showing another embodiment of the present invention.

FIG. 6 is an explanatory view of a waste gas treatment device showing still another embodiment of the present invention.

FIG. 7 is an explanatory view of a waste gas treatment device showing another embodiment of the present invention.

[Explanation of symbols]

 1 Waste air treatment device 9 Air blower as an air intake device 10 Ventilation guide unit as an air intake device 11 Waste gas introduction pipe 12 Tapered pipe section 13 Vacuum pump as a pressure discharge device 13A Blower as a pressure discharge device 14 Water Tank 15 Water tap 17 Flow rate control outlet 18 Strainer 20, 20A Sewer 130 Waste gas outlet

Claims (11)

[Scope of utility model registration request] 1. A waste device having an intake device provided near a waste gas source for generating waste gas and capable of sucking the waste gas, and a tapered pipe portion connected to the intake device and having a diameter reduced toward an exhaust side. A gas introduction pipe and a pressure discharge device that is connected to this waste gas introduction pipe and can form a high-speed dense airflow are provided. A waste air treatment device characterized by being provided. 2. The waste gas treatment apparatus according to claim 1, wherein a strainer is provided in the waste gas outlet pipe. 3. The waste gas treatment device according to claim 1, wherein the intake device is a ventilation guide unit that collects waste gas and guides it to the waste gas introduction pipe. 4. The waste air treatment device according to claim 1, wherein the intake device has an intake blower. 5. The waste gas treatment device according to claim 1, wherein the exhaust-side opening end of the waste gas outlet pipe is arranged in the sewer water of the sewer. 6. The waste gas treatment device according to claim 1, wherein the pressurized discharge device is a vacuum pump. 7. The waste air treatment device according to claim 1, wherein the pressure discharge device is a blower. 8. A closed water tank having an exhaust side opening end of the waste gas outlet pipe is provided near the bottom, and the exhaust side opening end of the waste gas outlet pipe is placed in the water in the water tank. The waste gas treatment device according to any one of claims 1 to 7, wherein the waste gas treatment device is installed and communicates with an upper part of the water tank to the sewer. 9. The waste gas treatment apparatus according to claim 8, wherein a water supply plug and a flow rate adjusting lead-out pipe are connected to the water tank, and the flow rate adjusting lead-out pipe is connected to the sewer. 10. The waste gas treatment apparatus according to claim 8 or 9, further comprising a synchronization means for synchronizing the operation of the water tap connected to the water tank with the operation of the pressure discharge device. 11. The waste gas treatment device according to claim 8, wherein an appropriate amount of a cleaning agent is added to the water supplied from the water tap into the water tank.