Kitchen waste odor treatment system and method thereof

Abstract

The kitchen waste odor treatment system comprises an alkali rotational flow plate tower, an acid spraying packed tower, a plant liquid spraying packed tower, a photocatalytic oxidation device, an induced draft fan and a discharge port which are sequentially connected, and air inlets of the alkali rotational flow plate tower, the acid spraying packed tower and the plant liquid spraying packed tower are all formed in the lower portion; the exhaust port is formed in the top, a plurality of groups of rotational flow plates are sequentially arranged in the alkali rotational flow plate tower from top to bottom, the alkali rotational flow plate tower is connected with the large storage tank alkali dosing device, the acid spraying packed tower is connected with the large storage tank acid dosing device, the plant liquid spraying packed tower is connected with the large storage tank plant liquid dosing device, and the two groups of photocatalytic oxidation devices are arranged. The two groups of photocatalytic oxidation devices are arranged in parallel up and down between the plant liquid spraying packed tower and the induced draft fan, and a gas pollutant concentration online monitor is arranged at the discharge port. The system has the advantages that the service life of the whole system is prolonged, and meanwhile, the odor purification effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of restaurant waste treatment, and in particular to a restaurant waste odor treatment system and method. Background Art

[0002] Food waste treatment requires sealed negative pressure deodorization of both the treatment equipment and the entire food waste treatment plant. The odorous gases extracted from the food waste treatment plant under negative pressure carry a significant amount of grease, necessitating a significant air volume to maintain negative pressure throughout the entire plant. Removal of the grease in the odorous gases must be completed as the first step in the deodorization system, and the significant deodorization air volume results in a significant footprint for the deodorization system. In previous projects, photocatalytic oxidation lamps were often burned by water vapor introduced from the front-end spray tower. Summary of the Invention

[0003] The purpose of the present invention is to provide a restaurant waste odor treatment system and method, which can achieve large-volume restaurant waste odor treatment while occupying a small area. At the same time, it can remove water mist before photocatalytic oxidation, thereby increasing the service life of the entire system and improving the odor purification effect.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: A kitchen waste odor treatment system is characterized by comprising an alkali swirl plate tower, an acid spray packing tower, a plant liquid spray packing tower, a photocatalytic oxidation device, an induced draft fan and a discharge port connected in sequence, wherein the air inlets of the alkali swirl plate tower, the acid spray packing tower and the plant liquid spray packing tower are all arranged at the bottom, and the exhaust port is arranged at the top; the inside of the alkali swirl plate tower is sequentially arranged with multiple arrays of swirl plates from top to bottom; the alkali swirl plate tower is connected to a large storage tank alkali dosing device; the acid spray packing tower is connected to a large storage tank acid dosing device; the plant liquid spray packing tower is connected to a large storage tank plant liquid dosing device; two groups of photocatalytic oxidation devices are provided, and the two groups of photocatalytic oxidation devices are arranged in parallel up and down between the plant liquid spray packing tower and the induced draft fan; and an online monitor for gas pollutant concentration is provided at the discharge port.

[0005] Preferably, the alkali cyclone plate tower is also connected to an alkali liquid circulation device, the liquid inlet of the alkali liquid circulation device is connected to the bottom of the alkali cyclone plate tower through a pipeline, and the liquid outlet of the alkali liquid circulation device is connected to an array of alkali spray assemblies inside the alkali cyclone plate tower through a pipeline, and the arrays of alkali spray assemblies are correspondingly installed on the cyclone plates, and a temperature sensor and an online alkali pH meter are provided on the pipeline between the alkali liquid circulation device and the alkali spray assembly.

[0006] Preferably, a hot water heating coil is further provided at the bottom of the alkali cyclone plate tower below the air inlet, and the water inlet of the hot water heating coil is provided below the water outlet.

[0007] Preferably, the acid spray packed tower is also connected to an acid liquid circulation device, and two groups of acid spray packing layers are arranged in sequence from top to bottom inside the acid spray packed tower. The liquid inlet of the acid liquid circulation device is connected to the bottom of the acid spray packed tower through a pipeline, and the liquid outlet of the acid liquid circulation device is connected to two groups of acid spray components inside the acid spray packed tower through a pipeline. The two groups of acid spray components are correspondingly installed on the acid spray packing layers, and an online acid pH meter is provided on the pipeline between the acid liquid circulation device and the acid spray component.

[0008] Preferably, the plant liquid spray packing tower is also connected to two groups of independently arranged plant liquid circulation devices, and two groups of plant liquid spray packing layers are arranged in sequence from top to bottom inside the plant liquid spray packing tower. The liquid inlets of the two groups of plant liquid circulation devices are respectively connected through pipes and arranged at the bottom of the plant liquid spray packing tower, and the liquid outlets of the plant liquid circulation devices are connected to two groups of plant liquid spray components inside the plant liquid spray packing tower through pipes, and the two groups of plant liquid spray components are correspondingly installed on the plant liquid spray packing layers.

[0009] Preferably, the filler of the upper plant liquid spraying filler layer is a multi-faceted hollow ball with a large surface area, and the filler of the lower plant liquid spraying filler layer is a ball ring structure.

[0010] Preferably, the upper and lower plant liquid spray components in the acid spray packed tower are separately arranged, the plant liquid spray component in the lower layer is in a normally open state, and the plant liquid spray component in the upper layer, the large storage tank plant liquid dosing device and the gas pollutant concentration online monitor are controlled in linkage.

[0011] Preferably, the air inlets of the two groups of photocatalytic oxidation devices are sequentially connected with a gas flow meter and an electric regulating valve.

[0012] A method for treating odor from kitchen waste, characterized by comprising the following steps: The odor of kitchen waste enters the lower part of the alkaline cyclone plate tower and is discharged from the top. It contacts the alkaline liquid film on the surface of the three-layer cyclone plate and the acidic odor is removed by the alkaline absorbent heated to 40℃. The odor discharged from the alkali cyclone plate tower enters the lower part of the acid spray packing tower and is discharged from the top, where the alkaline odor is removed by the acid absorbent; The odor discharged from the acid spray packed tower enters the lower part of the plant liquid spray packed tower and is discharged from the top. The plant liquid is used to fully absorb and decompose the odor pollutants. The exhaust gas from the plant liquid spraying packed tower enters the photocatalytic oxidation device, where it rapidly decomposes odor pollutants. The exhaust gas from the photocatalytic oxidation device is discharged into the atmosphere through the induced draft fan and the exhaust port.

[0013] Preferably, the air intake of the two groups of photocatalytic oxidation devices is automatically adjusted by the corresponding electric regulating valves through the feedback signal of the gas flow meter, so as to evenly distribute the air intake of the upper and lower groups of photocatalytic oxidation devices.

[0014] In summary, the present invention has the following beneficial effects: it can achieve large-volume kitchen waste odor treatment while occupying a small area, and can remove water mist before photocatalytic oxidation, thereby increasing the service life of the overall system and improving the odor purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the system structure of the present invention. DETAILED DESCRIPTION

[0016] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. This embodiment does not constitute a limitation to the present invention.

[0017] like Figure 1 The kitchen waste odor treatment system shown in the figure includes an alkali cyclone plate tower 1, an acid spray packing tower 2, a plant liquid spray packing tower 3, a photocatalytic oxidation device 4, an induced draft fan 5 and a discharge port 6 connected in sequence. The air inlets of the alkali cyclone plate tower 1, the acid spray packing tower 2 and the plant liquid spray packing tower 3 are all arranged at the bottom, and the exhaust port is arranged at the top. The alkali cyclone plate tower 1 is sequentially arranged with a plurality of cyclone plates 11 from top to bottom. The alkali cyclone plate tower 1 is connected to a large storage tank alkali dosing device 12, the acid spray packing tower 2 is connected to a large storage tank acid dosing device 21, and the plant liquid spray packing tower 3 is connected to a large storage tank plant liquid dosing device 31. There are two groups of photocatalytic oxidation devices 4, and the two groups of photocatalytic oxidation devices 4 are arranged in parallel between the plant liquid spray packing tower 3 and the induced draft fan 5, which greatly reduces the floor space and occupies only about 400m 2 An online gas pollutant concentration monitor 61 is installed at the discharge port 6. Each large storage tank can store a long-term dosage of medicine, and cooperate with automatic adjustment of air volume and automatic dosing to realize long-term unmanned automatic operation of the kitchen waste odor treatment system.

[0018] The alkali cyclone plate tower 1 is also connected to an alkali liquid circulation device 13. The liquid inlet of the alkali liquid circulation device 13 is connected to the bottom of the alkali cyclone plate tower 1 through a pipeline. The liquid outlet of the alkali liquid circulation device 13 is connected to an array of alkali spray components 14 inside the alkali cyclone plate tower 1 through a pipeline. The array of alkali spray components 14 is correspondingly installed on the cyclone plate 11. A temperature sensor 15 and an online alkali pH meter 16 are provided on the pipeline between the alkali liquid circulation device 13 and the alkali spray component 14 to effectively remove the grease carried in the odor of kitchen waste. The online alkali pH meter 16 monitors and realizes automatic dosing of the large storage tank alkali dosing device 12.

[0019] A hot water heating coil 17 is also provided at the bottom of the alkali cyclone plate tower 1 below the air inlet. The water inlet of the hot water heating coil 17 is provided below the water outlet. The temperature sensor 15 controls the hot water heating coil 17 to heat the alkaline absorbent to 40°C.

[0020] The acid spray packed tower 2 is also connected to an acid liquid circulation device 22. Two groups of acid spray packing layers 23 are arranged in sequence from top to bottom inside the acid spray packed tower 2. The liquid inlet of the acid liquid circulation device 22 is connected to the bottom of the acid spray packed tower 2 through a pipeline. The liquid outlet of the acid liquid circulation device 22 is connected to two groups of acid spray components 24 inside the acid spray packed tower 2 through a pipeline. The two groups of acid spray components 24 are correspondingly installed on the acid spray packing layer 23. An online acid pH meter 25 is provided on the pipeline between the acid liquid circulation device 22 and the acid spray components 24. Automatic dosing of the large storage tank acid dosing device 21 is achieved through monitoring by the online acid pH meter 25.

[0021] The plant liquid spray packing tower 3 is also connected to two sets of independently arranged plant liquid circulation devices 32. Two sets of plant liquid spray packing layers 33 are arranged in sequence from top to bottom inside the plant liquid spray packing tower 3. The liquid inlets of the two sets of plant liquid circulation devices 32 are connected through pipes and are arranged at the bottom of the plant liquid spray packing tower 3. The liquid outlets of the plant liquid circulation devices 32 are connected to the inside of the plant liquid spray packing tower 3 through pipes and are connected to two sets of plant liquid spray components 34. The two sets of plant liquid spray components 34 are correspondingly installed on the plant liquid spray packing layer 33.

[0022] The filler of the upper plant liquid spraying filler layer 33 is a multi-faceted hollow ball with a large surface area, and the filler of the lower plant liquid spraying filler layer 33 is a ball ring structure.

[0023] The upper and lower plant liquid spray assemblies 34 in the acid spray packing tower 2 are separately arranged. The lower plant liquid spray assembly 34 is in a normally open state. The upper plant liquid spray assembly 34, the large storage tank plant liquid dosing device and the gas pollutant concentration online monitor 61 are linked and controlled. The lower plant liquid spray assembly 34 sprays plant liquid to absorb and decompose odor pollutants. The upper plant liquid spray assembly 34 does not open the spray system during normal operation. The corresponding upper plant liquid spray packing layer 33 is used as a demisting system to enhance defoaming, effectively remove water vapor entrained in the gas, prevent water vapor from entering the rear-end photocatalytic oxidation device 4, extend the service life of the photocatalytic oxidation device 4, and enhance the use effect of the photocatalytic oxidation device 4. When the gas pollutant concentration online monitor 61 detects that the odor concentration fluctuates to a high concentration, the upper plant liquid spray assembly 34 and the lower plant liquid spray assembly 34 are opened at the same time, and the plant liquid is used to fully absorb and decompose the odor pollutants.

[0024] The air inlets of the two groups of photocatalytic oxidation devices 4 are connected in sequence with a gas flow meter 41 and an electric regulating valve 42 .

[0025] A method for treating odor from kitchen waste comprises the following steps: The odor of food waste enters the lower part of the alkaline cyclone plate tower 1 and is discharged from the top, where it contacts the alkaline liquid film on the surface of the three-layer cyclone plate 11. The alkaline absorbent heated to 40°C removes acidic odors such as H2S, and effectively removes grease carried in the odor of food waste.

[0026] The odor discharged from the alkali cyclone plate tower 1 enters the lower part of the acid spray packed tower 2 and is discharged from the top, where alkaline odors such as NH3 are removed by acid absorbent.

[0027] The odor discharged from the acid spray packed tower 2 enters the lower part of the plant liquid spray packed tower 3 and is discharged from the top, and the plant liquid is used to fully absorb and decompose the odor pollutants.

[0028] The exhaust gas from the plant liquid spray packing tower 3 enters the photocatalytic oxidation device 4. The air intake of the two groups of photocatalytic oxidation devices 4 is fed back by the gas flow meter 41, which automatically adjusts the corresponding electric regulating valve 42 to evenly distribute the air intake of the upper and lower groups of photocatalytic oxidation devices 4, and quickly decomposes odor pollutants through the photocatalytic oxidation device 4.

[0029] The exhaust gas from the photocatalytic oxidation device 4 is discharged into the atmosphere through the induced draft fan 5 and the exhaust port 6, and the odor is finally completely purified and meets the emission standards.

[0030] The present invention can achieve large-volume kitchen waste odor treatment while occupying a small area. It can also remove water mist before photocatalytic oxidation, thereby increasing the service life of the entire system and improving the odor purification effect.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A system for treating odor from kitchen waste, characterized in that: It includes an alkali swirl plate tower, an acid spray packing tower, a plant liquid spray packing tower, a photocatalytic oxidation device, an induced draft fan and a discharge port which are connected in sequence, wherein the air inlets of the alkali swirl plate tower, the acid spray packing tower and the plant liquid spray packing tower are all arranged at the lower part, and the exhaust port is arranged at the top; the alkali swirl plate tower is provided with a plurality of swirl plates in sequence from top to bottom; the alkali swirl plate tower is connected to a large storage tank alkali dosing device; the acid spray packing tower is connected to a large storage tank acid dosing device; the plant liquid spray packing tower is connected to a large storage tank plant liquid dosing device; two groups of the photocatalytic oxidation device are arranged in parallel between the plant liquid spray packing tower and the induced draft fan; and an online monitor for gas pollutant concentration is arranged at the discharge port.

2. A kitchen waste odor treatment system according to claim 1, characterized in that: The alkali cyclone plate tower is also connected to an alkali liquid circulation device, the liquid inlet of the alkali liquid circulation device is connected to the bottom of the alkali cyclone plate tower through a pipeline, the liquid outlet of the alkali liquid circulation device is connected to an array of alkali spray components inside the alkali cyclone plate tower through a pipeline, and the arrays of alkali spray components are correspondingly installed on the cyclone plates, and a temperature sensor and an online alkali pH meter are arranged on the pipeline between the alkali liquid circulation device and the alkali spray component.

3. A kitchen waste odor treatment system according to claim 1, characterized in that: A hot water heating coil is also arranged at the bottom of the alkali cyclone plate tower below the air inlet, and the water inlet of the hot water heating coil is arranged below the water outlet.

4. A kitchen waste odor treatment system according to claim 1, characterized in that: The acid spray packing tower is also connected to an acid liquid circulation device. Two groups of acid spray packing layers are sequentially arranged inside the acid spray packing tower from top to bottom. The liquid inlet of the acid liquid circulation device is connected to the bottom of the acid spray packing tower through a pipeline. The liquid outlet of the acid liquid circulation device is connected to two groups of acid spray components inside the acid spray packing tower through a pipeline. The two groups of acid spray components are correspondingly installed on the acid spray packing layers. An online acid pH meter is arranged on the pipeline between the acid liquid circulation device and the acid spray components.

5. A kitchen waste odor treatment system according to claim 1, characterized in that: The plant liquid spray packing tower is also connected to two groups of independently arranged plant liquid circulation devices, and two groups of plant liquid spray packing layers are arranged in sequence from top to bottom inside the plant liquid spray packing tower. The liquid inlets of the two groups of plant liquid circulation devices are connected by pipes and arranged at the bottom of the plant liquid spray packing tower respectively, and the liquid outlets of the plant liquid circulation device are connected to two groups of plant liquid spray components inside the plant liquid spray packing tower through pipes, and the two groups of plant liquid spray components are installed correspondingly on the plant liquid spray packing layers.

6. A kitchen waste odor treatment system according to claim 5, characterized in that: The filler of the upper plant liquid spraying filler layer is a multi-faceted hollow ball with a large surface area, and the filler of the lower plant liquid spraying filler layer is a ball ring structure.

7. A method for treating odor from kitchen waste according to claim 5, characterized in that: The upper and lower plant liquid spray components in the acid spray packing tower are separately arranged, the lower plant liquid spray component is in a normally open state, and the upper plant liquid spray component, the large storage tank plant liquid dosing device and the gas pollutant concentration online monitor are linked and controlled.

8. The system for treating odor from kitchen waste according to claim 1, characterized in that: The air inlets of the two groups of photocatalytic oxidation devices are connected in sequence with a gas flow meter and an electric regulating valve.

9. A method for treating odor from kitchen waste, characterized in that: The steps include: The odor of kitchen waste enters the lower part of the alkaline cyclone plate tower and is discharged from the top. It contacts with the alkaline liquid film on the surface of the three-layer cyclone plate, and the acidic odor is removed by the alkaline absorbent heated to 40°C. The odor discharged from the alkaline cyclone plate tower enters the lower part of the acid spray packing tower and is discharged from the top, where the alkaline odor is removed by the acid absorbent; The odor discharged from the acid spray packing tower enters the lower part of the plant liquid spray packing tower and is discharged from the top, and the plant liquid is used to fully absorb and decompose the odor pollutants; The exhaust gas from the plant liquid spraying packing tower enters the photocatalytic oxidation device, where it rapidly decomposes odor pollutants; The exhaust gas from the photocatalytic oxidation device is discharged into the atmosphere through the induced draft fan and the exhaust port.

10. A method for treating odor from kitchen waste according to claim 9, characterized in that: The air intake of the two groups of photocatalytic oxidation devices is automatically adjusted by the corresponding electric regulating valves through the feedback signal of the gas flow meter, so as to evenly distribute the air intake of the upper and lower groups of photocatalytic oxidation devices.

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