Tail gas water interception device and deodorization system

Abstract

The utility model discloses a tail gas water interception device and a deodorization system. The tail gas water interception device comprises a first interception chamber, a second interception chamber and a tail gas pipe, the first interception chamber is provided with a washing cavity, and washing liquid is contained in the washing cavity; the second interception chamber is provided with a filler cavity communicated with the upper part of the washing cavity, filler is accommodated in the filler cavity, and the filler cavity is provided with an exhaust port communicated with the outside; the tail gas pipe is provided with a gas inlet end extending into the washing cavity, and the gas inlet end is located below the liquid level of the washing liquid and used for guiding tail gas into the washing liquid. According to the tail gas purification device, after tail gas enters the washing liquid, part of liquid drops containing deodorant can be absorbed and diluted by the washing liquid, and the washing liquid can prevent the tail gas from flowing in the rising process of the tail gas, so that the tail gas can pass through the filler at a lower flow speed, and at the moment, the filler can deeply condense and intercept water vapor containing deodorant in the tail gas; therefore, the recovery efficiency of the deodorant in the tail gas is improved, and massive loss of the deodorant is avoided.

Description

Technical Field

[0001] This utility model relates to the field of deodorization technology, specifically to a tail gas water interception device and deodorization system. Background Technology

[0002] When a biological deodorization tower is in operation, waste gas is typically introduced into the tower through a duct. The waste gas comes into full contact with the deodorizing liquid sprayed inside the tower, resulting in an absorption and neutralization reaction, thereby purifying the waste gas. After purification, the waste gas is dehydrated and demisted by a demister plate before being discharged into the atmosphere by a fan.

[0003] CN205216574U discloses a biological filtration device for purifying odors, which includes a biological filter tower with an air inlet. A waste liquid treatment mechanism is provided below the air inlet, and a pre-rinsing component, a biological packing layer, a spray device, and a demisting component are installed sequentially on the upper part. Sprayers are arranged alternately on both sides above the biological packing layer, which greatly increases the spray coverage area. The demisting component removes water vapor containing deodorizing agent from the exhaust gas, thereby improving the recovery efficiency of the deodorizing absorption liquid.

[0004] Although existing deodorization systems have added demisting components for dehydration and demisting, in actual operation, when the fan is running at full frequency, the exhaust gas emission velocity is relatively high, which still causes a large amount of water vapor to be sprayed and lost at the tail end of the exhaust port along with the high-speed airflow, resulting in a large amount of deodorizing absorbent being lost. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a tail gas water interception device to solve the technical problem in the prior art that when the fan is running at full frequency, the tail gas emission velocity is relatively high, which still causes a large amount of water vapor to be sprayed and lost at the tail end of the exhaust port along with the high-speed airflow, resulting in a large amount of deodorizing absorption liquid being lost.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides a tail gas water interception device, comprising:

[0008] The first retention chamber has a washing chamber containing washing liquid;

[0009] The second retention chamber has a packing chamber connected to the upper part of the washing chamber, the packing chamber containing packing material and having an exhaust port connected to the outside; and

[0010] The exhaust pipe has an air inlet that extends into the washing chamber. The air inlet is located below the surface of the washing liquid and is used to introduce exhaust gas into the washing liquid.

[0011] In some embodiments, the second retention chamber further includes a diffusion cavity, which is located below the packing cavity and communicates with the packing cavity;

[0012] The washing chamber has a flow guide port, which is located above the liquid surface of the washing liquid and is connected to the diffusion chamber.

[0013] In some embodiments, the cross-sectional area of ​​the guide port is larger than the cross-sectional area of ​​the air inlet.

[0014] In some embodiments, the exhaust gas water interception device further includes a flow-guiding diffuser, which is located in the diffusion cavity and has an internal channel that communicates with the flow-guiding port. The inner diameter of the flow-guiding diffuser gradually increases in the direction away from the washing cavity.

[0015] In some embodiments, the bottom of the diffusion chamber and the bottom of the washing chamber are located on the same horizontal plane and are in communication with each other.

[0016] In some embodiments, the bottom of the washing chamber is provided with a plurality of connecting ports, which are arranged at horizontal intervals and respectively connect to the bottom of the diffusion chamber; and / or,

[0017] The connection between the bottom of the washing chamber and the bottom of the diffusion chamber is located below the air inlet.

[0018] In some embodiments, the diffusion chamber further includes an overflow port located below the guide port and above the highest liquid level of the washing liquid. The exhaust gas water interception device further includes an overflow valve located at the overflow port.

[0019] In some embodiments, the washing chamber further includes a liquid replenishment port, and the exhaust gas water interception device further includes a liquid replenishment pipe and a water float valve. The liquid replenishment pipe is connected to the liquid replenishment port for inputting washing liquid, and the valve core of the water float valve is located inside the liquid replenishment pipe, and its float is located inside the washing chamber.

[0020] In some embodiments, the exhaust gas water interception device further includes an interception tower and a baffle plate, the baffle plate being disposed in the inner cavity of the interception tower and the interception tower being spaced apart to form the first interception chamber and the second interception chamber.

[0021] Secondly, this utility model also provides a deodorization system, which includes the exhaust gas water interception device as described in any of the above claims.

[0022] Compared with the prior art, the exhaust gas water interception device provided by this utility model introduces the purified exhaust gas into the washing liquid in the first interception chamber through the exhaust gas pipe. After the exhaust gas enters the washing liquid, on the one hand, the gas and liquid in the exhaust gas separate under the action of inertia, so that some droplets containing deodorant can be absorbed and diluted by the washing liquid; on the other hand, as the exhaust gas rises, the washing liquid will hinder the flow of the exhaust gas, so that the flow rate of the exhaust gas decreases in a stepwise manner, allowing the exhaust gas to pass through the packing at a lower flow rate. At this time, the packing can deeply condense and intercept the water vapor containing deodorant in the exhaust gas. The treated exhaust gas is finally discharged through the exhaust port, thereby improving the recovery efficiency of deodorant in the exhaust gas and avoiding a large loss of deodorant. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the exhaust gas water interception device provided in this embodiment of the utility model;

[0024] Figure 2 yes Figure 1 A schematic diagram of the first and second retention chambers.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. First interception chamber; 1a. Washing chamber; 1b. Flow guide port; 1c. Connecting port; 1d. Liquid replenishment port; 2. Second interception chamber; 2a. Packing chamber; 2b. Exhaust port; 2c. Diffusion chamber; 2d. Overflow port; 2e. Vent port; 21. Packing; 3. Tail gas pipe; 31. Inlet end; 4. Overflow valve; 5. Water float valve; 6. Vent valve; 7. Interception tower; 8. Baffle plate. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] To address the technical problem in existing technologies where a large amount of water vapor is sprayed and lost at the exhaust port due to the high exhaust velocity when the fan is running at full frequency, resulting in a significant loss of deodorizing absorbent, this invention provides an exhaust gas water interception device. This device improves the recovery efficiency of deodorizing agent in the exhaust gas and prevents a large loss of deodorizing agent.

[0029] It should be noted that the exhaust gas water interception device described in this utility model is used in, but not limited to, deodorization systems. For ease of explanation, this utility model only uses the application of the exhaust gas water interception device in a deodorization system as an example. The principle of the exhaust gas water interception device in other types of equipment is essentially the same as that in the deodorization system, and will not be described in detail here.

[0030] Please see Figure 1 and Figure 2 , Figure 1 and Figure 2 This is a schematic diagram of the exhaust gas water interception device in one embodiment of the present invention. The exhaust gas water interception device includes a first interception chamber 1, a second interception chamber 2, and an exhaust pipe 3. The first interception chamber 1 has a washing chamber 1a, which contains washing liquid. The second interception chamber 2 has a packing chamber 2a connected to the upper part of the washing chamber 1a, which contains packing 21 and has an exhaust port 2b connected to the outside. The exhaust pipe 3 has an air inlet end 31 extending into the washing chamber 1a, which is located below the liquid surface of the washing liquid and is used to introduce exhaust gas into the washing liquid. Specifically, in this embodiment, the packing chamber 2a is located above the washing chamber 1a.

[0031] In the exhaust gas water interception device provided by this utility model, the purified exhaust gas is introduced into the washing liquid in the first interception chamber 1 through the exhaust gas pipe 3. After the exhaust gas enters the washing liquid, on the one hand, the gas and liquid in the exhaust gas separate under the action of inertia, so that some droplets containing deodorant can be absorbed and diluted by the washing liquid; on the other hand, during the process of the exhaust gas rising, the washing liquid will hinder the flow of the exhaust gas, thereby causing the flow rate of the exhaust gas to decrease in a stepwise manner, so that the exhaust gas can pass through the packing 21 at a lower flow rate. At this time, the packing 21 can deeply condense and intercept the water vapor containing deodorant in the exhaust gas; and the treated exhaust gas is finally discharged through the exhaust port 2b, thereby improving the recovery efficiency of deodorant in the exhaust gas and avoiding a large loss of deodorant.

[0032] It should be noted that the packing material 21 can be in the form of a demister as in existing technologies, or it can be in the form of sand and gravel with a corresponding screen, or it can be in other forms. Specifically, in this solution, the packing layer adopts a combination structure of porous ceramic packing material 21 and PP (polypropylene) corrugated plate, with a packing density of 200-400 m² / m³. In addition, the washing liquid in this solution is water.

[0033] In one embodiment, the second retention chamber 2 further has a diffusion chamber 2c, which is located below the packing chamber 2a and communicates with the packing chamber 2a; the washing chamber 1a has a guide port 1b, which is located above the liquid surface of the washing liquid and communicates with the diffusion chamber 2c.

[0034] In this embodiment, a diffusion chamber 2c is also provided below the packing chamber 2a, and the guide port 1b of the washing chamber 1a, the diffusion chamber 2c, and the packing chamber 2a are sequentially connected. Thus, after the exhaust gas floats out of the washing liquid, it enters the diffusion chamber 2c through the guide port 1b, and then enters the packing 21 through the diffusion chamber 2c, allowing the exhaust gas to diffuse within the diffusion chamber 2c, further reducing the airflow velocity and improving the recovery efficiency of the deodorizing absorbent. Simultaneously, the droplets condensed on the packing 21 can drip into the diffusion chamber 2c for collection, facilitating recycling. Furthermore, separating the packing 21 from the washing liquid through the diffusion chamber 2c also prevents the washing liquid from splashing onto the packing 21 and affecting its filtration efficiency.

[0035] In one embodiment, the cross-sectional area of ​​the guide port 1b is larger than the cross-sectional area of ​​the air inlet 31.

[0036] In this embodiment, the cross-sectional area of ​​the guide port 1b is set to be larger than that of the inlet end 31, so that the exhaust gas can also be decelerated when passing through the guide port 1b. That is, in this solution, four-stage deceleration is achieved through the washing liquid, the guide port 1b, the diffuser chamber 2c, and the packing 21, further improving the deodorizing absorbent recovery efficiency. Specifically, in this solution, the cross-sectional area of ​​the guide port 1b is 1.5-3 times the cross-sectional area of ​​the inlet end 31. In addition, the inlet end 31 is inserted into the washing liquid to a depth of 50-300 mm.

[0037] In one embodiment, the exhaust gas water interception device further includes a flow guide diffuser located in the diffusion chamber 2c, and its internal channel is connected to the flow guide port 1b. The inner diameter of the flow guide diffuser gradually increases in the direction away from the washing chamber 1a.

[0038] In this embodiment, the guide diffuser is arranged to gradually expand in the direction away from the washing chamber 1a, which can guide the exhaust gas to diffuse further in the diffuser chamber 2c, so as to reduce the flow rate of the exhaust gas in the diffuser chamber 2c. On the one hand, it allows the low-speed airflow to come into contact with the condensate dripping from the packing 21 for separation; on the other hand, it also facilitates the packing 21 to trap the deodorant absorbent liquid in the low-speed airflow.

[0039] In one embodiment, the bottom of the diffusion cavity 2c and the bottom of the washing cavity 1a are located on the same horizontal plane and are connected to each other.

[0040] In this embodiment, the bottom of the diffusion chamber 2c is connected to the bottom of the washing chamber 1a so as to balance the deodorizing absorption liquid collected in the two chambers and facilitate its collection and discharge for recycling.

[0041] In one embodiment, the bottom of the washing chamber 1a is provided with a plurality of connecting ports 1c, which are arranged at intervals in the horizontal direction and respectively connect to the bottom of the diffusion chamber 2c.

[0042] In this embodiment, multiple connecting ports 1c are provided at the bottom of the washing chamber 1a to facilitate the connection of washing liquid between the two chambers, thereby reducing the impact of liquid level fluctuations caused by the introduction of exhaust gas into the washing chamber 1a. Specifically, in this design, the connecting ports 1c are located below the air inlet 31 to further reduce the impact of liquid level fluctuations caused by the introduction of exhaust gas.

[0043] In one embodiment, the diffusion chamber 2c also has an overflow port 2d, which is located below the guide port 1b and above the highest liquid level of the washing liquid. The tail gas water interception device also includes an overflow valve 4, which is located at the overflow port 2d.

[0044] In this embodiment, when the liquid level in the diffusion chamber 2c is accidentally too high, the overflow valve 4 can be opened to drain the solution from the diffusion chamber 2c in a timely manner. Specifically, in this solution, the overflow valve 4 is a U-shaped water seal valve to achieve leakage while ensuring the airtightness of the diffusion chamber 2c. In addition, the overflow port 2d is at least 50 mm lower than the bottom of the guide port 1b. It should be noted that the specific structure and principle of the U-shaped water seal valve are existing technologies and will not be described in detail here. Furthermore, in this solution, the bottom of the diffusion chamber 2c is also provided with a vent port 2e, and a vent valve 6 is installed at the vent port 2e.

[0045] In one embodiment, the washing chamber 1a also has a liquid replenishment port 1d, and the exhaust gas water interception device also includes a liquid replenishment pipe and a water float valve 5. The liquid replenishment pipe is connected to the liquid replenishment port 1d and is used to input washing liquid. The valve core of the water float valve 5 is located in the liquid replenishment pipe, and its float is located in the washing chamber 1a.

[0046] In this embodiment, a replenishment port 1d is provided at the washing chamber 1a, and a float valve 5 is provided to automatically replenish washing liquid into the washing chamber 1a, improving convenience. It should be noted that the specific structure and principle of the float valve 5 are existing technologies and will not be described in detail here.

[0047] It should be noted that the first interception chamber 1 and the second interception chamber 2 can be set up as two independent containers, and the two containers are connected by corresponding pipes; or a container can be divided into two interception chambers.

[0048] In one embodiment, the exhaust gas water interception device further includes an interception tower 7 and a baffle 8. The baffle 8 is disposed in the inner cavity of the interception tower 7 and the interception tower 7 is spaced apart to form a first interception chamber 1 and a second interception chamber 2.

[0049] In this embodiment, the interception tower 7 is separated by a partition 8 to form a first interception chamber 1 and a second interception chamber 2, making the overall structure relatively compact. Specifically, in this solution, both the guide port 1b and the connecting port 1c are formed on the partition 8, thereby eliminating the need for external pipe connections and further improving the compactness of the device.

[0050] Furthermore, this utility model also provides a deodorization system, which includes the exhaust gas and water interception device described above. It should be noted that the detailed structure of the exhaust gas and water interception device in the deodorization system can be found in the embodiments described above, and will not be repeated here. Since the exhaust gas and water interception device described above is used in the deodorization system of this utility model, the embodiments of the deodorization system of this utility model include all the technical solutions of all embodiments of the exhaust gas and water interception device described above, and the achieved technical effects are completely the same, and will not be repeated here.

[0051] To better understand this utility model, the following is combined with... Figure 1 and Figure 2 The technical solution of this utility model is described in detail below:

[0052] When this scheme is implemented, the exhaust gas is sent into the washing liquid from the inlet 31 of the exhaust pipe 3, floats up from the washing liquid, and then enters the diffusion chamber 2c through the guide port 1b and the guide diffuser. Then, it diffuses and slows down in the diffusion chamber 2c, and finally, after the deodorizing absorption liquid is intercepted by the packing 21, it is discharged through the exhaust port 2b.

[0053] Specifically, in one embodiment, when the exhaust gas enters the washing liquid at a speed of 12 m / s through the exhaust pipe 3 with an immersion depth of 150 mm, the gas bubbles burst after floating out of the washing liquid, and the gas velocity drops to 3 m / s. After passing through the guide port 1b with a cross-sectional area 2.5 times that of the inlet 31, it enters the diffusion chamber 2c, where the velocity drops to 1.2 m / s. Finally, in a composite packing layer with a filling density of 350 m² / m³, the velocity further drops to 0.5 m / s, resulting in a final purified gas moisture content of <100 mg / m³. During this process, the washing chamber 1a maintains a constant liquid level through the float valve 5, and the overflow water in the diffusion chamber 2c is returned to the circulation treatment system through a U-shaped water seal valve.

[0054] Thus, the exhaust gas in this scheme undergoes three-stage treatment: liquid seal washing, expansion and deceleration, and packing interception. Through a specific design of the ratio between the immersion depth of the exhaust pipe 3 and the cross-sectional area of ​​the guide port 1b, the airflow velocity is reduced in a stepwise manner. Specifically, the airflow velocity can be reduced from 12m / s to 0.5m / s, achieving efficient gas-liquid separation, effectively solving the problem of absorbent entrainment and loss, reducing the water content of the exhaust gas to below 100mg / m³, and simultaneously realizing water resource recycling. Moreover, the device has a compact structure and its operating cost is reduced by more than 40% compared to traditional equipment.

[0055] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A tail gas water interception device, characterized in that, include: The first retention chamber has a washing chamber, the washing chamber being filled with washing liquid; The second retention chamber has a packing chamber connected to the upper part of the washing chamber, the packing chamber is filled with packing material, and has an exhaust port connected to the outside; and The exhaust pipe has an air inlet that extends into the washing chamber. The air inlet is located below the surface of the washing liquid and is used to introduce exhaust gas into the washing liquid.

2. The exhaust gas water interception device according to claim 1, characterized in that, The second retention chamber also has a diffusion cavity, which is located below the packing cavity and communicates with the packing cavity; The washing chamber has a flow guide port, which is located above the liquid surface of the washing liquid and is connected to the diffusion chamber.

3. The exhaust gas water interception device according to claim 2, characterized in that, The cross-sectional area of ​​the guide port is larger than the cross-sectional area of ​​the air inlet.

4. The exhaust gas water interception device according to claim 3, characterized in that, The exhaust gas water interception device also includes a flow guide diffuser, which is located in the diffusion cavity and its internal channel is connected to the flow guide port. The inner diameter of the flow guide diffuser gradually increases in the direction away from the washing cavity.

5. The exhaust gas water interception device according to claim 2, characterized in that, The bottom of the diffusion chamber and the bottom of the washing chamber are on the same horizontal plane and are connected to each other.

6. The exhaust gas water interception device according to claim 5, characterized in that, The bottom of the washing chamber is provided with multiple connecting ports, which are arranged at horizontal intervals and respectively connect to the bottom of the diffusion chamber; and / or, The connection between the bottom of the washing chamber and the bottom of the diffusion chamber is located below the air inlet.

7. The exhaust gas water interception device according to claim 2, characterized in that, The diffusion chamber also has an overflow port, which is located below the guide port and above the highest liquid level of the washing liquid. The exhaust gas water interception device also includes an overflow valve, which is located at the overflow port.

8. The exhaust gas water interception device according to claim 1, characterized in that, The washing chamber also has a liquid replenishment port, and the exhaust gas water interception device further includes a liquid replenishment pipe and a water float valve. The liquid replenishment pipe is connected to the liquid replenishment port and is used to input washing liquid. The valve core of the water float valve is located inside the liquid replenishment pipe, and its float is located inside the washing chamber.

9. The exhaust gas water interception device according to claim 1, characterized in that, The exhaust gas water interception device also includes an interception tower and a baffle plate. The baffle plate is disposed in the inner cavity of the interception tower and the interception tower is spaced apart to form the first interception chamber and the second interception chamber.

10. A deodorization system, characterized in that, Includes the exhaust gas water interception device as described in any one of claims 1-9.

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