JPH01203025A - Deodorizing method and device for gas containing smelly component - Google Patents

Abstract

PURPOSE:To deodorize efficiently by providing a contact layer constituted of an anticorrosion metal net as a contact filter medium in an intermediate section of a deodorizing column and flowing from the upper section downward treated gas, spraying water and decomposing and deodorizing solution of water soluble smelly component through said contact layer. CONSTITUTION:Domestic drain treatment gas containing a smelly component generated in a purifying treatment device is introduced into an upper space 3 of a deodorizing column 1 through a suction pipe 5. Then, a valve 9 is opened and the water in which air is mixed is jetted out of a spray opening 8, while a suction fan 14 of an exhaust pipe 13 is actuated to generate a downcoming air flow in the deodorizing column 1. As the treated gas containing smelly component passes through a contact layer 2, the smelly component comes in contact with spray water while passing through the mesh of a contact filter medium 6 to dissolve sulfur dioxide, ammonia gas and the like. Also, as a deodorizing solution to decompose a water insoluble smelly component is dropped from a deodorizing solution tank 10 onto the contact layer 2, the smelly component is decomposed and deodorized, and the deodorized gas is discharged out of a lower space 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for deodorizing gases containing odor components, and more specifically, to chain food chain stores,
A gas containing odor components that removes odor components from gases containing odors generated from domestic wastewater purification treatment equipment installed in restaurants, medical institutions, food manufacturing and other factories, offices, theaters, apartment complexes, etc. This invention relates to a deodorizing method and device.

[Conventional technology]

-G, domestic wastewater discharged from food factories, hospitals, chain food stores, and restaurants in food districts contains cooking and tableware washing water, food scraps, etc., and this domestic wastewater contains oils, fats, proteins, Contains ingredients such as starch that take a long time to be decomposed by microorganisms.

Therefore, in order to completely decompose these oils, fats, proteins, starches, etc., domestic wastewater is allowed to stay in purification treatment equipment for a long period of time. When decomposed, sulfur dioxide gas, ammonia gas, etc. are generated mainly from oils and fats, producing various odor components. If the treated gas that generates these odor components is discharged directly into the outside air, it will cause environmental pollution. Cause.

Therefore, as a measure to deal with such problems, attempts have been made to deodorize odor components by passing them through an activated carbon layer.

[Problem to be solved by the invention]

However, activated carbon loses its activity in a short period of time, and the activated carbon must be replaced with new one frequently, requiring a cumbersome replacement process, and the disposal of activated carbon requires time and effort. I can't do it.

[Means to solve the problem]

This invention was made to solve these problems, and in the purification treatment of domestic wastewater, oils, fats, proteins,
Processing gas containing odor components generated by decomposition of starch, etc. is introduced into the upper space of the deodorizing tower through the intake pipe, and water is sprayed from the upper space of the deodorizing tower onto a contact layer using a corrosion-resistant metal mesh as a contact filter medium. Then, the treated gas is brought into contact with spray water while passing through the contact layer to dissolve water-soluble odor components such as ammonia gas and sulfur dioxide gas, and a deodorizing liquid for decomposing water-insoluble odor components is dropped onto the contact layer. The water-insoluble odor components of the treated gas are decomposed by being diffused into the contact layer together with the spray water, and the deodorized gas after contacting the contact layer is discharged from the space below the contact layer through an exhaust pipe, so that the contact layer is made of activated carbon. Use it without replacing it as in the case,
From the processed gas generated from domestic wastewater purification equipment, etc.
This makes it possible to efficiently and completely remove odor components.

〔Example〕

Next, an explanation will be given with reference to the drawings showing an embodiment of the method and apparatus for deodorizing a gas containing odor components according to the present invention.

In FIG. 1, 1 is a deodorizing tower, and this deodorizing tower 1 is provided with a contact layer 2 in the middle part through which gas and liquid freely flow, and spaces 3 and 4 are formed above and below the contact layer 2. has been done. Reference numeral 5 denotes an intake pipe which is connected to the upper space 3 of the deodorizing tower 1 . Further, the contact layer 2 is filled with a wire made of a corrosion-resistant metal such as stainless steel having a mesh opening of about 2 mm as a contact filter medium 6.

7 is a water supply pipe arranged in the space 3 above the deodorizing tower 1;
A spray port 8 for spraying water onto the contact layer 2 is provided at the tip of the water supply pipe 7. The water supply pipe 7 is installed along the outer wall of the deodorizing tower 1, and air is sent in by a blower to raise the water to the top of the deodorizing tower 1 due to the air lift effect. Water is sprayed onto the contact layer 2.

Reference numeral 10 denotes a deodorizing liquid tank installed above the exterior of the deodorizing tower 1, in which a deodorizing liquid capable of decomposing water-insoluble odor components is stored. dripped. As the deodorizing liquid, for example, a solution of a vegetable deodorizing liquid such as a camellia leaf extract liquid, or a chemical deodorizing agent such as chlorhexidine gluconate is used.

13 is an exhaust pipe that communicates with the lower space 4 of the deodorizing tower 1, and an intake fan 14 is provided in the middle of this exhaust pipe 13, and water droplets generated in the lower space 4 are diffused by the operation of the intake fan 14. It is sucked and rises inside the exhaust pipe 13. At this time,
A diffusion prevention filter 15 is installed in the exhaust pipe 13 to prevent water droplets from adhering to the intake fan 14 and causing corrosion.

Reference numeral 16 denotes a float valve provided in the lower space 4 of the deodorizing tower 1, and water is supplied through a water supply pipe 17 to keep the amount of water accumulated in the lower space 4 constant. 18 is a valve of the water supply pipe 17. 19 is an inspection port, and the float valve 16 inside the deodorizing tower 1
Used for inspection and repair of etc. Reference numeral 20 denotes a drain pipe, which is normally closed and is opened to drain the liquid accumulated in the lower space 4 when the deodorizing tower 1 is inspected or repaired.

The deodorizing device for gas containing odor components of the present invention is constructed in this way, and as shown in FIGS. 3 and 4, the suction pipe 5 of the deodorizing tower 1 is connected to the domestic wastewater purification device 21. Can be attached. At this time, the intake pipe 5 may be attached to any or all of the separation tanks 22, 23 and storage tanks 24 of the purification treatment device 21, and odor components generated in these various types can be introduced into the deodorizing tower 1. It is done like this.

The domestic wastewater purification treatment equipment 21 shown in Fig. 2 and below consists of a separation tank 2
2.23. Consists of a storage tank 24 and a flow rate adjustment tank 25. Domestic wastewater containing fats, oils, proteins, starches, etc. contaminated by cooking, washing dishes, etc. is removed from the flow rate adjustment tank after solids are removed. The liquid flows into the flow rate adjustment tank 25 from an inflow pipe 26 connected to the flow rate adjusting tank 25 .

Then, the inflow pump 27 supplies water to the separation tank 23 via the waste water supply pipe 28, and the water is supplied to the separation tank 23 through the communication hole 29.
2 is also supplied.

Next, the aeration pipe 30 placed at the bottom of the separation tank 22.23
Air is sent through the air supply pipe 31, and air is blown into the domestic wastewater from the air diffusion holes 32 of the air diffusion pipe 30. By blowing this air, oils, fats, proteins, starches, etc. contained in domestic wastewater are decomposed by aerobic microorganisms.

In addition, oils, proteins, starches, etc., which are dispersed in domestic wastewater with almost the same specific gravity as water, are floated to the surface of the water, and the floated oils, proteins, starches, etc. are sent to the air blowing pipe 34 of the discharge device 33. The air is sucked in from the collection port 35 by blowing air into the storage tank 2 through the discharge port 36 and the discharge pipe 37.
4 and stored for a predetermined period of time as stored water. This retention period.

During this time, oils, proteins, starches, etc. in the stored water are mainly decomposed by anaerobic microorganisms.

In this way, the stored water is gradually purified, and after a predetermined period of time, it is returned to the flow rate adjustment tank 25 via the return pipe 38 by the operation of the return pump 39. Then, the inflow pipe 2 is connected to the flow rate adjustment tank 25.
Together with the domestic wastewater newly introduced from 6, it is returned to the separation tank 23 via the wastewater supply pipe 28, and this circulation is repeated.

Due to this circulation, oils, proteins, starches, etc. that are not decomposed during the retention period in the storage tank 24 are returned undecomposed together with the stored water and are repeatedly decomposed, and the wastewater treated by this repeated decomposition is sent to the separation tank 24. It is discharged from a drain pipe 40 connected to.

In this way, when fats, oils, proteins, starches, etc. are decomposed, in addition to water-soluble odor components such as sulfur dioxide gas and ammonia, water-insoluble odor components are generated in the tank, and these odor components are directly discharged. This will cause environmental pollution problems, but in this invention, the odor components generated in the domestic wastewater purification treatment device are guided to the deodorizing tower 1 for treatment, so the odor components are completely removed and discharged. .

[Effect]

The method and device for deodorizing treated domestic wastewater gas of the present invention have the above configuration, and the treated gas containing odor components generated in the separation tanks 22, 23 and storage tank 24 of the purification treatment device 21 is brought into the intake air. It is introduced into the upper space 3 of the deodorizing tower 1 through the pipe 5.

Next, when the valve 9 is opened, the water mixed with air by the blower rises through the water supply pipe 7 erected along the outer wall of the deodorizing tower 1 due to the air lift effect, and is ejected from the spray port 8 . In addition, the deodorizing tower 1
A downward airflow is generated from the upper space 3 to the lower space 4, and the processing gas containing odor components flows through the contact layer 2, so that the odor components come into contact with the spray water while passing through the mesh of the contact filter medium 6. As a result, among the odor components, water-soluble odor components such as sulfur dioxide gas and ammonia gas are dissolved.

Further, a deodorizing liquid capable of decomposing water-insoluble odorous components is dripped onto the contact layer 2 from the deodorizing liquid tank 10, diffuses into the contact layer 2 together with spray water, comes into contact with the water-insoluble odorous components, and decomposes the odorous components. Makes it smell bad. After contact, the deodorizing gas flows through the exhaust pipe 13 from the space 4 below the contact layer 2, and is passed through the diffusion prevention filter 15.
The water droplets are removed and discharged through the exhaust pipe 13 by the suction force of the intake air amount 14.

〔Effect of the invention〕

According to the method and apparatus for deodorizing a gas containing odor components of the present invention, the treated gas containing odor components generated by the decomposition of fats, oils, proteins, starches, etc. is introduced into the upper space of the deodorization tower through the suction pipe, and deodorization is carried out. Water is sprayed from the upper space of the tower onto a contact layer using a corrosion-resistant metal mesh as a contact filter medium, and the treated gas is brought into contact with the sprayed water without passing through the contact layer to remove water-soluble odor components such as ammonia gas and sulfur dioxide gas. At the same time, a deodorizing liquid for decomposing water-insoluble odorous components is dropped onto the contact layer, and is diffused into the contact layer together with the sprayed water to decompose the water-insoluble odorous components of the treated gas, thereby deodorizing the water-insoluble odorous components after contacting the contact layer. Because the gas is discharged from the space below the contact layer through the exhaust pipe, it is generated in chain food stores, restaurants in the restaurant area, medical institutions, food manufacturing and other factories, offices, theaters, apartment complexes, etc. It is possible to efficiently and completely remove odor components generated by the decomposition treatment of oils and fats, white matter, starch, etc. in domestic wastewater purification equipment.

In particular, since odor components are removed by a contact layer using a corrosion-resistant metal mesh as a contact filter medium, the contact between the odor components and the spray water is good, and water-insoluble odor components dropped onto the contact layer are decomposed. Diffusion of the moist deodorizing liquid also improves, and deodorization by decomposition of water-insoluble odor components can be carried out efficiently. Furthermore, there is no need to replace the contact layer, odor components can be easily removed, and environmental pollution due to discharge of processing gas can be prevented.

[Brief Description of the Drawings] Fig. 1 is a longitudinal sectional view showing an example of the deodorizing device for domestic wastewater treated gas of the present invention, Fig. 2 is an internal plan view showing an example of the purification processing device, and Fig. 3 is the deodorizing device. FIG. 4 is a partially cross-sectional explanatory view of the attached purification device. FIG. 4 is a sectional view of the purification device attached with the deodorizing device. 1... Deodorizing tower, 2... Contact layer, 3... Upper space,
4... Lower space, 5... Intake pipe, 6... Contact filter medium, 7... Water supply pipe, 8... Spray nozzle, 10... Deodorizing liquid tank, 13... Exhaust pipe, 14...Intake fan patent applicant Hamamoto Equipment Industry Co., Ltd.

Claims (1)

[Claims] 1. Gas containing odor components is introduced into the upper space of the deodorizing tower through the intake pipe, and water is sprayed from the upper space of the deodorizing tower onto a contact layer using a corrosion-resistant metal mesh as a contact filter medium. Then, a deodorizing liquid that decomposes the water-insoluble odor components is dropped into the contact layer, and is diffused into the contact layer together with the spray water to dissolve the water-insoluble odor components of the gas. A method 2 for deodorizing a gas containing an odor component, characterized in that the odor component is decomposed and the deodorized gas after contact is discharged from the space below the contact layer through an exhaust pipe, an intake pipe is connected in communication with the space above the deodorization tower, A contact layer using a corrosion-resistant metal mesh as a contact filter medium is installed in the middle of the deodorizing tower.
A water supply pipe is installed in the space above the deodorizing tower, a spray port is provided at the tip of the water pipe to spray water onto the contact layer, and a water-insoluble deodorizing liquid for decomposing odor components is dripped above the outside of the deodorizing tower. A deodorizing device for gases containing odor components, characterized in that a deodorizing liquid tank is provided, an exhaust pipe is connected to the space below the deodorizing tower, and an intake fan is provided in the middle of the exhaust pipe.