Tail gas purification system for methyl mercaptan

Abstract

The utility model discloses a methyl mercaptan tail gas purification system which comprises a combustion chamber and a treatment chamber, a cooling channel is arranged between the combustion chamber and the treatment chamber in a communicated mode, an air inlet pipe is arranged between the cooling channel and the treatment chamber in a communicated mode, and a U-shaped pipe is arranged on the treatment chamber in a communicated mode. The U-shaped pipe comprises an inlet end communicated with the treatment chamber and an outlet end far away from the treatment chamber, the inlet end is higher than the gas inlet pipe, and the outlet end is lower than the inlet end. Excessive liquid in the treatment chamber can be discharged immediately, and the liquid is prevented from flowing into the air inlet pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of methyl mercaptan tail gas treatment, in particular to a methyl mercaptan tail gas purification system. Background Art

[0002] Methyl mercaptan is toxic and its odor threshold is extremely low. Even a very small amount of methyl mercaptan can be detected by humans, causing serious impacts on the surrounding environment and residents.

[0003] In order to treat methyl mercaptan tail gas, a Chinese patent application with publication number CN218962243U discloses a system for treating methyl mercaptan tail gas, which first burns the tail gas, then cools the burned tail gas, and passes the cooled gas into a treatment chamber, where it reacts with lime water sprayed in the treatment chamber and oxygen passed into the treatment chamber to obtain gypsum and purified flue gas.

[0004] However, the existing tail gas system cannot discharge the lime water in the treatment chamber in time, so the existing tail gas system cannot be used continuously for too long. The tail gas purification must be suspended at intervals to discharge the excess lime water and gypsum in the treatment chamber, otherwise there is a risk of lime water flowing into the air intake pipe on the treatment chamber. Utility Model Content

[0005] The utility model aims to provide a tail gas purification system for methyl mercaptan, which can discharge excessive liquid in a processing chamber in real time and prevent the liquid from flowing into an air intake pipe.

[0006] In order to solve the above technical problems, the utility model adopts the following solutions:

[0007] A tail gas purification system for methyl mercaptan includes a combustion chamber and a treatment chamber, a cooling channel is provided between the combustion chamber and the treatment chamber, an air intake pipe is provided between the cooling channel and the treatment chamber, a U-shaped tube is provided on the treatment chamber, the U-shaped tube includes an inlet end connected to the treatment chamber and an outlet end away from the treatment chamber, the height of the inlet end is higher than the height of the air intake pipe, and the height of the outlet end is lower than the height of the inlet end. The air intake pipe is arranged horizontally. A filter is arranged in the inlet end. The combustion chamber and the cooling channel are prior art and will not be described in detail. Its function is that, through the arrangement of the U-shaped tube and the design of the height of the inlet end and the outlet end, when the water level in the treatment chamber reaches the inlet end, the liquid enters the U-shaped tube through the inlet end and is discharged. Since the inlet pipe is higher than the inlet end, the liquid will not enter the inlet pipe. At the same time, since the outlet end is lower than the inlet end, the liquid in the U-shaped tube will not flow back from the inlet end into the treatment chamber.

[0008] Furthermore, a discharge hopper is provided at the bottom of the treatment chamber, a discharge pipe is provided below the discharge hopper, and a stop valve is provided on the discharge pipe. Its function is to prevent gypsum and liquid from being discharged from the discharge pipe during purification through the setting of the stop valve.

[0009] Further, an exhaust port is provided at the top of the treatment chamber. Its function is that through the setting of the exhaust port, the purified flue gas can be discharged.

[0010] Further, a spray head for spraying lime water is provided between the exhaust port and the gas outlet section.

[0011] Further, an air delivery pipe is provided in the treatment chamber. The air delivery pipe is communicated with the air inlet pipe. An air outlet is provided at one end of the air delivery pipe away from the air inlet pipe, and the height of the air outlet is higher than that of the inlet end. Its function is that through the setting of the air delivery pipe and the design of the height of the air outlet, the section of the air delivery pipe below the height of the inlet end will be immersed in the liquid in the discharge hopper, and the tail gas in the air delivery pipe can be further cooled.

[0012] Further, the bottom end of the air delivery pipe is connected to the discharge hopper, the air inlet pipe is communicated with the side wall of the air delivery pipe, an air outlet section is provided at the top end of the air delivery pipe, the air outlet is provided at one end of the air outlet section away from the air delivery pipe, and the air outlet is arranged downward. Its function is that through the setting of the air outlet section, it can prevent the lime water from falling into the air outlet.

[0013] Further, a water passing port is provided at the bottom end of the air delivery pipe, the height of the water passing port is lower than that of the air inlet pipe, and a water blocking plate for isolating the exhaust pipe from the discharge hopper is provided in the air delivery pipe, and the height of the water blocking plate is lower than that of the air inlet pipe. Its function is that through the setting of the water passing port and the water blocking plate, the liquid can submerge the water blocking plate, and the tail gas in the area corresponding to the water blocking plate can be cooled.

[0014] Further, an air vent ring for introducing oxygen is provided between the spray head and the air outlet section.

[0015] Further, the air vent ring is in a circular ring shape, the bottom surface of the air vent ring is provided with air vent holes inclined from top to bottom towards the middle, and the air vent ring is communicated with an air delivery pipe for introducing oxygen into the air vent ring. Its function is that through the setting of the orientation of the air vent holes, the gypsum on the air outlet section can be blown off.

[0016] Further, the spray head is connected with a spray disc, the spray disc is connected with a spray pipe for inputting lime water, the spray disc is provided with a plurality of communicating pipes uniformly distributed in a circular ring shape extending along the radial direction of the spray disc and concentric with the spray disc, and the spray head is arranged on the bottom surface of the communicating pipe.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. Through the setting of the U-shaped pipe and the design of the heights of the inlet end and the outlet end, when the water level in the treatment chamber reaches the inlet end, the liquid enters the U-shaped pipe through the inlet end and then is discharged. Since the air inlet pipe is higher than the inlet end, the liquid will not enter the air inlet pipe. At the same time, since the outlet end is lower than the inlet end, the liquid in the U-shaped pipe will not flow back from the inlet end to the treatment chamber;

[0019] 2. Through the setting of the gas delivery pipe and the design of the outlet height, the section of the gas delivery pipe below the inlet end height will be immersed in the liquid in the discharge hopper, further cooling the tail gas in the gas delivery pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of Embodiment 1;

[0021] Figure 2 It is a top view structural diagram of the spray tray in Embodiment 1.

[0022] Reference numerals: 1, combustion chamber; 2, treatment chamber; 3, cooling channel; 4, intake pipe; 5, U-shaped pipe; 6, inlet end; 7, outlet end; 8, discharge hopper; 9, discharge pipe; 10, stop valve; 11, gas delivery pipe; 12, gas outlet section; 13, gas outlet; 14, water inlet; 15, water baffle; 16, exhaust port; 17, spray head; 18, ventilation ring; 19, ventilation hole; 20, ventilation pipe; 21, spray tray; 22, spray pipe; 23, connecting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will further describe the present utility model in detail in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present utility model are not limited thereto.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0025] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "provided with", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] Embodiment 1

[0027] A tail gas purification system for methyl mercaptan, as Figure 1 shown, which includes a combustion chamber 1 and a treatment chamber 2. A cooling channel 3 is communicatively provided between the combustion chamber 1 and the treatment chamber 2. An intake pipe 4 is communicatively provided between the cooling channel 3 and the treatment chamber 2. It is characterized in that: a U-shaped pipe 5 is communicatively provided on the treatment chamber 2. The U-shaped pipe 5 includes an inlet end 6 communicatively connected to the treatment chamber 2 and an outlet end 7 far from the treatment chamber 2. The height of the inlet end 6 is higher than that of the intake pipe 4, and the height of the outlet end 7 is lower than that of the inlet end 6. The intake pipe 4 is horizontally arranged. A filter screen is provided inside the inlet end 6. Its function is that through the setting of the U-shaped pipe 5 and the design of the heights of the inlet end 6 and the outlet end 7, when the water level in the treatment chamber 2 reaches the inlet end 6, the liquid enters the U-shaped pipe 5 through the inlet end 6 and then is discharged. Since the intake pipe 4 is higher than the inlet end 6, the liquid will not enter the intake pipe 4. At the same time, since the outlet end 7 is lower than the inlet end 6, the liquid in the U-shaped pipe 5 will not flow back from the inlet end 6 to the treatment chamber 2.

[0028] Specifically, as Figure 1 shown, a discharge hopper 8 is provided at the bottom end of the treatment chamber 2. A discharge pipe 9 is communicatively provided below the discharge hopper 8. A stop valve 10 is provided on the discharge pipe 9. Its function is that through the setting of the stop valve 10, it can avoid the discharge of gypsum and liquid from the discharge pipe 9 during purification.

[0029] Specifically, as Figure 1 shown, an exhaust port 16 is provided at the top end of the treatment chamber 2. Its function is that through the setting of the exhaust port 16, the purified flue gas can be discharged.

[0030] Specifically, as Figure 1 shown, a spray head 17 for spraying lime water is provided between the exhaust port 16 and the outlet section 12.

[0031] Specifically, as Figure 1 shown, an air delivery pipe 11 is provided inside the treatment chamber 2. The air delivery pipe 11 is communicatively connected to the intake pipe 4. An air outlet 13 is provided at one end of the air delivery pipe 11 far from the intake pipe 4. The height of the air outlet 13 is higher than that of the inlet end 6. Its function is that through the setting of the air delivery pipe 11 and the design of the height of the air outlet 13, the section of the air delivery pipe 11 below the height of the inlet end 6 will be immersed in the liquid in the discharge hopper 8 to further cool the tail gas in the air delivery pipe 11.

[0032] Specifically, as Figure 1 shown, the bottom end of the air delivery pipe 11 is connected to the discharge hopper 8. The intake pipe 4 is communicatively connected to the side wall of the air delivery pipe 11. An outlet section 12 is provided at the top end of the air delivery pipe 11. The air outlet 13 is provided at one end of the outlet section 12 far from the air delivery pipe 11, and the air outlet 13 is arranged downward. Its function is that through the setting of the outlet section 12, it can avoid the lime water from falling into the air outlet 13.

[0033] Specifically, as Figure 1 shown, a water inlet 14 is provided at the bottom end of the gas transmission pipe 11. The height of the water inlet 14 is lower than that of the air inlet pipe 4. A water baffle 15 for isolating the exhaust pipe from the discharge hopper 8 is provided in the gas transmission pipe 11, and the height of the water baffle 15 is lower than that of the air inlet pipe 4. Its function is that through the settings of the water inlet 14 and the water baffle 15, the liquid can submerge the water baffle 15 to cool the tail gas in the area corresponding to the water baffle 15.

[0034] Specifically, as Figure 1 shown, an air supply ring 18 for introducing oxygen is provided between the spray head 17 and the air outlet section 12.

[0035] Specifically, as Figure 1 shown, the air supply ring 18 is in a circular ring shape. The bottom surface of the air supply ring 18 is provided with air holes 19 that slope from top to bottom towards the middle. The air supply ring 18 is connected to an air supply pipe 20 for introducing oxygen into the air supply ring 18. Its function is that through the setting of the orientation of the air holes 19, the gypsum on the air outlet section 12 can be blown off.

[0036] Specifically, as Figure 2 shown, the spray head 17 is connected to a spray disc 21. The spray disc 21 is connected to a spray pipe 22 for inputting lime water. The spray disc 21 is provided with a plurality of communication pipes 23 that extend radially along the spray disc 21 and are evenly distributed in a circular ring shape concentric with the spray disc 21. The spray head 17 is arranged on the bottom surface of the communication pipe 23.

[0037] The working principle of this embodiment is described as follows: During the process of purifying the tail gas in the treatment chamber 2, lime water is continuously sprinkled. The lime water gradually fills the discharge hopper 8 and causes the liquid level to rise to the inlet end 6. The lime water flows into the inlet end 6 and then into the U-shaped pipe 5 and flows out from the outlet end 7. The tail gas passes through the combustion chamber 1 and then is cooled through the cooling channel 3. After that, it flows through the water baffle 15 and the gas transmission pipe 11. The lime water outside the water baffle 15 and the gas transmission pipe 11 further cools the tail gas in the gas transmission pipe 11. The tail gas enters the treatment chamber 2 after passing through the air outlet 13 on the air outlet section 12 and reacts with the lime water sprayed by the spray head 17 and the oxygen discharged from the air supply pipe 20, and is purified into gypsum and clean flue gas.

[0038] The above is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Based on the technical essence of the present invention, any simple modification, equivalent replacement, and improvement made to the above embodiments within the spirit and principle of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A tail gas purification system for methanethiol, comprising a combustion chamber (1) and a treatment chamber (2). A cooling channel (3) is communicatively provided between the combustion chamber (1) and the treatment chamber (2). An intake pipe (4) is communicatively provided between the cooling channel (3) and the treatment chamber (2), characterized in that: A U-shaped tube (5) is connected and communicated above the treatment chamber (2). The U-shaped tube (5) includes an inlet end (6) communicated with the treatment chamber (2) and an outlet end (7) far from the treatment chamber (2). The height of the inlet end (6) is higher than that of the intake pipe (4), and the height of the outlet end (7) is lower than that of the inlet end (6).

2. The tail gas purification system for methyl mercaptan according to claim 1, characterized in that: A discharge hopper (8) is arranged at the bottom end of the treatment chamber (2). A discharge pipe (9) is connected and communicated below the discharge hopper (8), and a stop valve (10) is arranged on the discharge pipe (9).

3. The tail gas purification system for methanethiol according to claim 2, characterized in that: An exhaust port (16) is arranged at the top end of the treatment chamber (2).

4. The tail gas purification system for methyl mercaptan according to claim 3, characterized in that: A spray head (17) for spraying lime water is arranged between the exhaust port (16) and the air outlet section (12).

5. The tail gas purification system for methyl mercaptan according to claim 4, characterized in that: An air delivery pipe (11) is arranged in the treatment chamber (2). The air delivery pipe (11) is communicated with the intake pipe (4). An air outlet (13) is arranged at one end of the air delivery pipe (11) far from the intake pipe (4), and the height of the air outlet (13) is higher than that of the inlet end (6).

6. The tail gas purification system for methyl mercaptan according to claim 5, characterized in that: The bottom end of the air delivery pipe (11) is connected to the discharge hopper (8). The intake pipe (4) is communicated with the side wall of the air delivery pipe (11). An air outlet section (12) is arranged at the top end of the air delivery pipe (11). The air outlet (13) is arranged at one end of the air outlet section (12) far from the air delivery pipe (11), and the air outlet (13) is arranged downward.

7. The tail gas purification system for methyl mercaptan according to claim 6, characterized in that: A water passing port (14) is arranged at the bottom end of the air delivery pipe (11). The height of the water passing port (14) is lower than that of the intake pipe (4). A water baffle (15) for isolating the exhaust pipe from the discharge hopper (8) is arranged in the air delivery pipe (11), and the height of the water baffle (15) is lower than that of the intake pipe (4).

8. The tail gas purification system for methyl mercaptan according to claim 7, wherein: An air vent ring (18) for introducing oxygen is arranged between the spray head (17) and the air outlet section (12).

9. The tail gas purification system for methyl mercaptan according to claim 8, characterized in that: The air vent ring (18) is in a circular ring shape. Vent holes (19) inclined from top to bottom towards the middle are arranged on the bottom surface of the air vent ring (18). An air delivery pipe (20) for introducing oxygen into the air vent ring (18) is communicated with the air vent ring (18).

10. The tail gas purification system for methyl mercaptan according to claim 7, characterized in that: The spray head (17) is connected with a spray disc (21). The spray disc (21) is connected with a spray pipe (22) for inputting lime water. A plurality of communication pipes (23) extending along the radial direction of the spray disc (21) and evenly distributed in a circular ring shape concentric with the spray disc (21) are arranged on the spray disc (21). The spray head (17) is arranged on the bottom surface of the communication pipe (23).

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