Vacuum oven tail gas recovery device

Abstract

The utility model relates to the technical field of metal pigment production, and provides a vacuum oven tail gas recovery device which comprises a shell, a condensation barrel arranged in the shell, a liquid collection tank and a vacuum pump, an air inlet is formed in the upper end of the shell, and a water inlet cavity and a water return cavity are formed in the positions, located at the two ends of the condensation barrel, in the shell respectively. A plurality of liquid flowing channels are evenly formed in the barrel wall of the condensation barrel in the circumferential direction, the two ends of each liquid flowing channel communicate with the water inlet cavity and the water return cavity correspondingly, and a liquid guiding pipe is arranged between the lower end of the shell and the liquid collecting tank. Oven tail gas enters the shell through the gas inlet under the suction action of the vacuum pump, the tail gas at a certain temperature is condensed and liquefied under the action of the condensation barrel and enters the liquid collection tank through the liquid guide pipe, and due to the fact that the specific gravity of solvent oil is smaller than that of water, the water component in condensate sinks, the solvent oil component floats upwards to form layers, and then solvent oil recovery is achieved. And the tail gas of the oven is fully recycled, so that the environmental pollution is greatly reduced while resource waste is avoided.

Description

Technical Field

[0001] This utility model relates to the field of metal pigment production technology, specifically a vacuum oven exhaust gas recovery device. Background Technology

[0002] Baking solvent-based metallic pigments is an essential step in the production of metallic pigments. With the development of the industry and the increasing awareness of environmental protection, the problem of recovering the exhaust gas generated during baking has become a focus of attention. In the current technology, the exhaust gas (containing vaporized solvent oil) generated when baking solvent-based metallic pigments is mostly directly emitted without being recovered and reused, which wastes resources and seriously pollutes the environment.

[0003] Therefore, this utility model proposes a vacuum oven exhaust gas recovery device to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a vacuum oven exhaust gas recovery device to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A vacuum oven exhaust gas recovery device includes a shell, a condenser cylinder, a liquid collection tank, and a vacuum pump disposed within the shell. The upper end of the shell is provided with an air inlet communicating with the exhaust end of the oven. The condenser cylinder is provided with a water inlet chamber and a water return chamber at both ends of the shell, respectively. The water inlet chamber is provided with a water inlet pipe, and the water return chamber is provided with a water return pipe. The condenser cylinder wall is provided with multiple liquid flow channels evenly distributed circumferentially, and the two ends of the liquid flow channels are respectively connected to the water inlet chamber and the water return chamber. A liquid guide pipe is provided between the lower end of the shell and the liquid collection tank.

[0007] In one alternative: the housing is provided with a rotating shaft, the rotating shaft is provided with a propeller and the propeller is directly opposite the air inlet, the rotating shaft is also provided with a scraper, and the side of the scraper is in contact with and attached to the inner wall of the condenser cylinder.

[0008] In one alternative: the liquid collection tank has a transparent observation port on its wall for observing the liquid condition inside, and the liquid collection tank has a discharge port at its bottom.

[0009] In one alternative: the liquid guide tube is uniformly provided with flow-slowing baffles to reduce the flow rate of condensate; the liquid collection tank is provided with a hollow component; there is a gap between the side of the hollow component and the inner wall of the liquid collection tank; the side of the hollow component is uniformly provided with drain holes; and the end of the liquid guide tube away from the shell is connected to the interior of the hollow component.

[0010] In one alternative: the bottom of the hollow component has a conical protrusion.

[0011] Compared with the prior art, the beneficial effects of this utility model embodiment are as follows:

[0012] The exhaust gas from the oven is drawn into the shell through the air inlet by a vacuum pump. The exhaust gas at a certain temperature is condensed and liquefied by the condenser and enters the collection tank through the liquid guide pipe. Since the specific gravity of solvent oil is less than that of water, the water component in the condensate will sink, while the solvent oil component will float to the top and form a stratification, thereby realizing the recovery of solvent oil and fully recycling the exhaust gas from the oven. This avoids resource waste and greatly reduces environmental pollution.

[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram showing the arrangement between the shell and the condenser cylinder in this utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of the liquid collection tank and the liquid guide pipe in an embodiment of this utility model.

[0018] Figure label annotations: 1-shell, 2-condenser cylinder, 3-water inlet chamber, 4-water return chamber, 5-shaft, 6-propeller, 7-air inlet, 8-water return pipe, 9-scraper, 10-water inlet pipe, 11-liquid guide pipe, 12-liquid collection tank, 13-vacuum pump, 14-transparent observation port, 15-discharge port, 16-liquid flow channel, 17-hollow component, 18-drain hole, 19-slow flow baffle. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] Please see Figure 1 and Figure 2A vacuum oven exhaust gas recovery device includes a housing 1, a condenser cylinder 2, a liquid collection tank 12, and a vacuum pump 13 disposed in the housing 1. The upper end of the housing 1 is provided with an air inlet 7 that communicates with the exhaust end of the oven. The housing 1 is provided with a water inlet chamber 3 and a water return chamber 4 at both ends of the condenser cylinder 2, respectively. The water inlet chamber 3 is provided with a water inlet pipe 10, and the water return chamber 4 is provided with a water return pipe 8. The condenser cylinder 2 is provided with multiple liquid flow channels 16 evenly distributed around its circumferential wall, and the two ends of the liquid flow channels 16 are respectively connected to the water inlet chamber 3 and the water return chamber 4. A liquid guide pipe 11 is provided between the lower end of the housing 1 and the liquid collection tank 12.

[0021] It should be noted that in this application, the cooling water is supplied from the outside. The cooling water enters the water inlet chamber 3 through the water inlet pipe 10, and then flows into the liquid flow channel 16 for heat exchange. The cooled water after heat exchange is collected in the return water chamber 4 and transported to the outside for cooling and reuse through the return water pipe 8. This is prior art and will not be described in detail here.

[0022] The exhaust gas from the oven enters the shell 1 through the air inlet 7 by the suction action of the vacuum pump 13 (the interior of the shell 1 and the collection tank 12 are connected by the liquid guide pipe 11). The exhaust gas at a certain temperature is condensed and liquefied by the condenser 2 and enters the collection tank 12 through the liquid guide pipe 11. Since the specific gravity of solvent oil is less than that of water, the water component in the condensate will sink, while the solvent oil component will float to the top and form a stratification, thereby realizing the recovery of solvent oil and fully recycling the exhaust gas from the oven. This avoids resource waste and greatly reduces environmental pollution.

[0023] Furthermore, the liquid collection tank 12 is provided with a transparent observation port 14 on its tank wall for observing the internal liquid condition. The bottom of the liquid collection tank 12 is provided with a discharge port 15, and the discharge port 15 is provided with a switch valve. After the oven exhaust gas recovery work is completed or the condensate in the liquid collection tank 12 reaches a certain amount, after the condensate in the liquid collection tank 12 has completely separated into layers, the lower layer of water component is discharged through the discharge port 15 first. During the discharge, the transparent observation port 14 is used for observation. After the water component is discharged, the solvent oil component is discharged to achieve recovery.

[0024] Please see Figure 1 In one embodiment of the present invention, the housing 1 is provided with a rotating shaft 5, the rotating shaft 5 is provided with a propeller 6, and the propeller 6 is directly opposite to the air inlet 7. The rotating shaft 5 is also provided with a scraper 9, and the side of the scraper 9 is in contact with and attached to the inner wall of the condenser cylinder 2.

[0025] In this embodiment, when the exhaust gas from the oven enters the housing 1, the airflow impacts the propeller 6, thereby driving the rotating shaft 5 to rotate. The rotation of the rotating shaft 5 causes the scraper 9 to revolve in contact with the inner wall of the condenser cylinder 2, thereby scraping off the condensate adhering to the inner wall of the condenser cylinder 2 and preventing the condensate from adhering and affecting the subsequent exhaust gas condensation effect.

[0026] Please see Figure 3 In one embodiment of the present invention, the liquid guide tube 11 is provided with a flow-slowing baffle 19 that slows down the flow rate of the condensate. The liquid collection tank 12 is provided with a hollow component 17. There is a gap between the side of the hollow component 17 and the inner wall of the liquid collection tank 12. The side of the hollow component 17 is provided with drain holes 18 evenly distributed around its circumference. The end of the liquid guide tube 11 away from the shell 1 is connected to the interior of the hollow component 17.

[0027] In this embodiment, the flow rate of the condensate is slowed down by the flow-slowing baffle 19, and then it enters the hollow part 17 and is discharged through the drain hole 18. The discharged condensate flows downward along the inner wall of the collection tank 12 to avoid the condensate dripping directly with a large impact force, which would cause the oil and water that have gradually separated to remix.

[0028] Furthermore, in this embodiment, the bottom of the hollow component 17 is conical, which allows the condensate entering the hollow component 17 to flow quickly to the drain hole 18 and be discharged.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vacuum oven exhaust gas recovery apparatus, characterized by, The utility model relates to a condenser, including shell (1), be located in condensing cylinder (2) in shell (1), liquid collecting tank (12) and vacuum pump (13), the upper end of shell (1) is equipped with with the air inlet (7) of communicating with the exhaust end of oven, the both ends of condensing cylinder (2) in shell (1) are equipped with water inlet chamber (3) and backwater chamber (4) respectively, wherein water inlet chamber (3) is equipped with water inlet pipe (10), backwater chamber (4) is equipped with backwater pipe (8), the circumferential of condensing cylinder (2) wall is equipped with multiple liquid walk passageways (16) evenly, and the both ends of liquid walk passageway (16) are communicated with water inlet chamber (3) and backwater chamber (4) respectively, the lower end of shell (1) is equipped with with the liquid guide pipe (11) between liquid collecting tank (12).

2. The vacuum oven exhaust gas recovery apparatus according to claim 1, characterized by The shell (1) is equipped with the pivot (5), the pivot (5) is equipped with the propeller (6), and the propeller (6) is opposite to the air inlet (7), the pivot (5) is further equipped with the scraping strip (9), and the side of scraping strip (9) is in contact with the inner wall of condensing cylinder (2).

3. The vacuum oven exhaust gas recovery apparatus according to claim 1, characterized by, The tank wall of liquid collecting tank (12) is equipped with transparent observation port (14) for observing the liquid condition in it, and the bottom of liquid collecting tank (12) is equipped with discharge port (15).

4. The vacuum oven exhaust gas recovery apparatus according to claim 1, characterized by, The inside of liquid guide pipe (11) is uniformly provided with slow-flow baffle (19) for slowing down the flow rate of condensate, the hollow part (17) is arranged in the liquid collecting tank (12), there is a gap between the side of hollow part (17) and the inner wall of liquid collecting tank (12), the side of hollow part (17) is uniformly provided with drainage hole (18) in the circumferential direction, and the end of liquid guide pipe (11) away from the shell (1) is communicated with the inside of hollow part (17).

5. The vacuum oven exhaust gas recovery apparatus according to claim 4, wherein The inner bottom of hollow part (17) is conical convex.

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