A waste gas treatment device for scrap metal

Abstract

The utility model discloses a waste gas treatment device for scrap metal, including an air intake pipe and an exhaust pipe, a three-way valve is installed at the end of the air intake pipe, one outlet of the three-way valve is connected to a first connecting pipe, the other outlet of the three-way valve is connected to a second connecting pipe, the end of the first connecting pipe is connected to a first waste gas treatment tower, the second connecting pipe is connected to a second waste gas treatment tower, the outlet end of the first waste gas treatment tower is connected to a first induced draft fan, and the outlet of the second waste gas treatment tower is connected to a second induced draft fan. The utility model adopts the above structure: by setting the first waste gas treatment tower and the second waste gas treatment tower for replacement, and using the set three-way valve for conversion, when one of the waste gas treatment towers needs to be maintained, the other waste gas treatment tower can be converted for use, solving the problem that the filter component can only be shut down when replaced and maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of waste metal processing, in particular to an exhaust gas treatment device for waste metal. Background Art

[0002] Waste gas refers to toxic and harmful gases discharged by humans during production and life. Metals produce waste gas during processing. For example, metal electroplating uses a large amount of toxic and harmful materials, such as hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid, chromic acid, sodium hydroxide, sodium cyanide and a large number of metal salts. These chemical materials will emit different degrees of gas during storage and use. Some gases will irritate the eyes, nose, throat, and skin of people and cause inflammation. Therefore, patent application number CN202121007646.4 discloses "a waste gas treatment device for electroplated metal products", which mainly includes a waste gas treatment tower, an activated carbon adsorption layer is provided above the interior of the waste gas treatment tower, and a water vapor absorption layer is provided below the activated carbon adsorption layer. The waste gas from metal processing is filtered by the above-mentioned components and other methods.

[0003] However, the activated carbon adsorption layer, water vapor absorption layer and other filtering components of the above-mentioned waste gas treatment tower are components that need to be replaced frequently. When replacing and maintaining the internal activated carbon adsorption layer, water vapor absorption layer and other filtering components, the machine can only be shut down, which affects the normal work progress, and when replacing the filtering components, the air inlet and outlet are both in a closed state. As mentioned above, the waste gas from scrap metal processing contains a large amount of toxic and harmful substances. These harmful substances cannot be released in the closed treatment tower. When the staff opens the treatment tower for maintenance, it is harmful to the human body. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an exhaust gas treatment device for scrap metal to solve the problem that when the filter components are replaced and maintained, the machine can only be shut down and harmful substances cannot be released in the closed treatment tower, affecting the safety of the maintenance staff.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A waste gas treatment device for scrap metal, comprising an air intake pipe and an exhaust pipe, a three-way valve is installed at the end of the air intake pipe, one outlet of the three-way valve is connected to a first connecting pipe, the other outlet of the three-way valve is connected to a second connecting pipe, the end of the first connecting pipe is connected to a first waste gas treatment tower, the second connecting pipe is connected to a second waste gas treatment tower, the outlet end of the first waste gas treatment tower is connected to a first induced draft fan, the outlet of the second waste gas treatment tower is connected to a second induced draft fan, the exhaust end of the first induced draft fan is connected to the exhaust pipe, and the second induced draft fan is connected to the exhaust pipe;

[0007] The three-way valve includes a sleeve, a first air outlet and a second air outlet are respectively provided on both sides of the top of the sleeve, a first connecting pipe is connected to the first air outlet, and a second connecting pipe is connected to the second air outlet, an air inlet is provided at the bottom of the sleeve, and an air inlet pipe is connected to the air inlet, a central axis is movably connected in the sleeve, a first piston and a second piston are respectively fixedly installed on the central axis, the central axis is driven by a driving member, a first one-way valve is installed on one side of the sleeve, and a second one-way valve is installed on the other side of the sleeve.

[0008] Preferably, the driving member is configured as a cylinder.

[0009] Preferably, the front sides of the first exhaust gas treatment tower and the second exhaust gas treatment tower are both hinged with sealed doors.

[0010] To sum up, the beneficial effects of the utility model are as follows: the utility model provides a waste gas treatment device for scrap metal, which replaces the first waste gas treatment tower and the second waste gas treatment tower by setting a three-way valve, so when one of the waste gas treatment towers needs maintenance, the other waste gas treatment tower can be switched for use, which solves the problem that the filter component can only be shut down for replacement and maintenance. At the same time, a first one-way valve and a second one-way valve are set on the side of the three-way valve. When one of the waste gas treatment towers is not passing waste gas, fresh air can be introduced for dilution, which solves the problem that harmful substances cannot be released in a closed treatment tower, affecting the safety of maintenance workers, greatly facilitates the maintenance work of the waste gas treatment tower by the workers and improves the safety of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a basic structural schematic diagram of the utility model;

[0012] Figure 2 It is a schematic diagram of the structure of the three-way valve of the utility model.

[0013] Figure numerals: 1. air inlet pipe; 2. exhaust pipe; 3. three-way valve; 31. sleeve; 32. first air outlet; 33. second air outlet; 34. air inlet; 35. central axis; 36. first piston; 37. second piston; 38. first one-way valve; 39. second one-way valve; 310. driving member; 4. first connecting pipe; 5. second connecting pipe; 6. first exhaust gas treatment tower; 7. second exhaust gas treatment tower; 8. first induced draft fan; 9. second induced draft fan; 10. sealing door. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0016] like Figure 1 - Figure 2 As shown, the utility model provides an exhaust gas treatment device for scrap metal, comprising an air intake pipe 1 and an exhaust pipe 2, a three-way valve 3 is installed at the end of the air intake pipe 1, one outlet of the three-way valve 3 is connected to a first connecting pipe 4, the other outlet of the three-way valve 3 is connected to a second connecting pipe 5, the end of the first connecting pipe 4 is connected to a first exhaust gas treatment tower 6, the second connecting pipe 5 is connected to a second exhaust gas treatment tower 7, the outlet end of the first exhaust gas treatment tower 6 is connected to a first induced draft fan 8, the outlet of the second exhaust gas treatment tower 7 is connected to a second induced draft fan 9, the exhaust end of the first induced draft fan 8 is connected to the exhaust pipe 2, and the second induced draft fan 9 is connected to the exhaust pipe 2;

[0017] The three-way valve 3 includes a sleeve 31, and a first air outlet 32 ​​and a second air outlet 33 are respectively provided on both sides of the top of the sleeve 31. The first connecting pipe 4 is connected to the first air outlet 32, and the second connecting pipe 5 is connected to the second air outlet 33. An air inlet 34 is provided at the bottom of the sleeve 31, and the air inlet pipe 1 is connected to the air inlet 34. A central axis 35 is movably connected in the sleeve 31, and a first piston 36 and a second piston 37 are respectively fixedly installed on the central axis 35. The central axis 35 is driven by a driving member 310. A first one-way valve 38 is installed on one side of the sleeve 31, and a second one-way valve 39 is installed on the other side of the sleeve 31.

[0018] The waste gas from scrap metal processing is introduced from the air inlet pipe 1, and can be controlled to enter the first waste gas treatment tower 6 or the second waste gas treatment tower 7 through the three-way valve 3. When the filter screen of the first waste gas treatment tower 6 needs to be replaced or maintained, the first piston 36 and the second piston 37 can be driven by the driving member 310 to move so that the corresponding gas outlet is connected to the waste gas treatment tower and the other gas outlet is closed. Figure 2 As shown, the exhaust gas in the intake pipe 1 enters the sleeve 31 and is discharged from the second connecting pipe 5. The second connecting pipe 5 is connected to the second exhaust gas treatment tower 7. After the exhaust gas is treated, it is discharged by the second induced draft fan 9; when the second exhaust gas treatment tower 7 needs to be opened for maintenance, the driving member 310 is used to drive the first piston 36 and the second piston 37 to move to the left as a whole, so that the intake pipe 1 is connected to the first connecting pipe 4. At this time, the exhaust gas enters the first exhaust gas treatment tower 6 for exhaust gas treatment. At the same time, the first induced draft fan 8 and the second induced draft fan 9 are both in the open state. Since the second one-way valve 39 is unidirectionally connected to the sleeve 31, the second one-way valve 39 introduces fresh air into the second connecting pipe 5 and passes into the second exhaust gas treatment tower 7. After a period of fresh air injection, the exhaust gas concentration in the air in the second treatment tower is significantly reduced. If the staff performs maintenance at this time, the safety is greatly improved. When the first exhaust gas treatment tower 6 needs maintenance, the principle is the same as above.

[0019] The driving member 310 is configured as a cylinder.

[0020] The front of the first exhaust gas treatment tower 6 and the front of the second exhaust gas treatment tower 7 are both hinged with a sealing door 10. By opening the sealing door 10, it is convenient to replace the internal filter and other components.

[0021] Working principle: When in use, the exhaust gas in the intake pipe 1 enters the sleeve 31 and is discharged from the second connecting pipe 5. The second connecting pipe 5 is connected to the second exhaust gas treatment tower 7. After the exhaust gas is treated, it is discharged by the second induced draft fan 9; when the second exhaust gas treatment tower 7 needs to be opened for maintenance, the driving member 310 is used to drive the first piston 36 and the second piston 37 to move to the left as a whole, so that the intake pipe 1 is connected to the first connecting pipe 4. At this time, the exhaust gas enters the first exhaust gas treatment tower 6 for exhaust gas treatment. At the same time, the first induced draft fan 8 and the second induced draft fan 9 are both in the open state. Since the second one-way valve 39 is unidirectionally connected to the sleeve 31, the second one-way valve 39 introduces fresh air into the second connecting pipe 5 and passes into the second exhaust gas treatment tower 7. After a period of fresh air injection, the exhaust gas concentration in the air in the second treatment tower is significantly reduced. If the staff performs maintenance at this time, the safety is greatly improved. When the first exhaust gas treatment tower 6 needs maintenance, the same principle is used.

[0022] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An exhaust gas treatment device for scrap metal, comprising an air intake pipe (1) and an exhaust pipe (2), characterized in that: A three-way valve (3) is installed at the end of the air inlet pipe (1); one outlet of the three-way valve (3) is connected to a first connecting pipe (4); the other outlet of the three-way valve (3) is connected to a second connecting pipe (5); the end of the first connecting pipe (4) is connected to a first exhaust gas treatment tower (6); the second connecting pipe (5) is connected to a second exhaust gas treatment tower (7); the outlet end of the first exhaust gas treatment tower (6) is connected to a first induced draft fan (8); the outlet of the second exhaust gas treatment tower (7) is connected to a second induced draft fan (9); the exhaust end of the first induced draft fan (8) is connected to the exhaust pipe (2); and the second induced draft fan (9) is connected to the exhaust pipe (2); The three-way valve (3) comprises a sleeve (31), a first air outlet (32) and a second air outlet (33) are respectively provided on both sides of the top of the sleeve (31), a first connecting pipe (4) is connected to the first air outlet (32), and a second connecting pipe (5) is connected to the second air outlet (33), an air inlet (34) is provided at the bottom of the sleeve (31), and an air inlet pipe (1) is connected to the air inlet (34), a central shaft (35) is movably connected inside the sleeve (31), a first piston (36) and a second piston (37) are respectively fixedly mounted on the central shaft (35), and the central shaft (35) is driven by a driving member (310), a first one-way valve (38) is mounted on one side of the sleeve (31), and a second one-way valve (39) is mounted on the other side of the sleeve (31).

2. The waste gas treatment device for scrap metal according to claim 1, characterized in that: The driving member (310) is configured as a cylinder.

3. The waste gas treatment device for scrap metal according to claim 1, characterized in that: The front sides of the first exhaust gas treatment tower (6) and the second exhaust gas treatment tower (7) are both hingedly provided with sealing doors (10).

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