Discharging device for liquid caustic soda and waste water treatment system of electrolytic aluminum factory
The liquid alkali unloading device, controlled by a negative pressure tank and sensors, solved the problem of residual liquid alkali in the wastewater treatment system of the electrolytic aluminum plant, realized a safe liquid alkali unloading process, and protected the safety of the staff.
Patent Information
- Application Number
- CN202423284977.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In the wastewater treatment system of an aluminum electrolytic plant, when tank trucks unload liquid alkali, residual liquid alkali in the delivery pipe can easily cause spillage, endangering the safety of workers.
The liquid caustic soda unloading device consists of a negative pressure tank, a sensor, an electric valve, and seals. The sensor detects the liquid level and controls the electric valve to achieve negative pressure delivery of liquid caustic soda and collection of residual liquid caustic soda, thus preventing liquid caustic soda from spilling.
This effectively avoids the residue and spillage of liquid alkali, protects the safety of workers, and reduces the dangers when disassembling the interface.
Smart Images
Figure CN223751577U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of special equipment for electrolytic aluminum plants, and particularly relates to a liquid caustic soda unloading device and an electrolytic aluminum plant wastewater treatment system applying the same. BACKGROUND
[0002] At present, in the electrolytic aluminum plant wastewater treatment system, when the tank car unloads liquid caustic soda, the tank car conveying pipe is directly connected with the unloading pump of the wastewater treatment system for conveying the liquid caustic soda. After the liquid caustic soda is conveyed, there is still some liquid caustic soda remaining in the tank car conveying pipe, and the staff may be injured by contacting the liquid caustic soda when disassembling the connection port. CONTENT OF THE UTILITY MODEL
[0003] The present application provides a liquid caustic soda unloading device and an electrolytic aluminum plant wastewater treatment system applying the same, which can avoid the liquid caustic soda remaining in the tank car conveying pipe to a certain extent. The specific technical scheme is as follows:
[0004] On one hand, the present application provides a liquid caustic soda unloading device, which comprises a negative pressure tank, a sensor and an electric valve connected electrically, a conveying pipe and a liquid caustic soda tank. The negative pressure tank has an unloading port for connecting with the unloading pipe of the liquid caustic soda tank car, and has an exhaust port at the top end. The sensor is arranged on the negative pressure tank, and is used for detecting the liquid level of the liquid caustic soda in the negative pressure tank, and controlling the opening and closing of the electric valve to open or close the exhaust port. One end of the conveying pipe is connected with the bottom of the negative pressure tank in communication. The top of the liquid caustic soda tank is connected with the other end of the conveying pipe in communication.
[0005] As an optional implementation, the liquid caustic soda unloading device provided by the present application further comprises a liquid level meter, which is arranged on the side wall of the negative pressure tank.
[0006] As an optional implementation, an unloading valve is arranged at the unloading port.
[0007] As an optional implementation, an inlet valve and an unloading pump are arranged on the conveying pipe.
[0008] As an optional implementation, a flow guide groove is arranged at the bottom of the conveying pipe, and the groove bottom wall of the flow guide groove extends downward in the direction close to the negative pressure tank.
[0009] As an optional implementation, the side wall of the flow guide groove is an inclined wall surface, and the lower end of the side wall of the flow guide groove extends obliquely in the direction close to the negative pressure tank.
[0010] As an optional implementation, a first sealing member is arranged between one end of the conveying pipe and the bottom of the negative pressure tank.
[0011] As an optional implementation, a second sealing member is arranged between the other end of the conveying pipe and the top of the liquid caustic soda tank.
[0012] As an optional embodiment, the first sealing member and the second sealing member are both sealing sleeves.
[0013] In another aspect, the application provides an electrolytic aluminum plant wastewater treatment system, comprising the above-mentioned caustic soda unloading device.
[0014] The caustic soda unloading device provided by the application and the electrolytic aluminum plant wastewater treatment system using the device can achieve the following effects: after the caustic soda tank truck arrives at the site, the unloading pipe is connected to the unloading port, when the liquid level reaches the high liquid level, the exhaust port is closed through the control relationship between the sensor and the electric valve, the caustic soda enters the caustic soda tank through the conveying pipe to complete the caustic soda unloading process, and after the caustic soda unloading is completed, the residual caustic soda in the conveying pipe can flow into the negative pressure tank along the conveying pipe, thereby avoiding the caustic soda from scattering on the ground and the workers from contacting the caustic soda, and to a certain extent, the harm to the workers is avoided. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 A structure diagram of the caustic soda unloading device provided by the embodiment of the application is shown in the figure.
[0016] Figure 2 A top view of the negative pressure tank in the caustic soda unloading device provided by the embodiment of the application is shown in the figure.
[0017] Figure 3 A connection structure diagram between the negative pressure tank and the conveying pipe in the caustic soda unloading device provided by the embodiment of the application is shown in the figure.
[0018] Figure 4 A structure diagram of the caustic soda unloading device provided by the embodiment of the application is shown in the figure. Figure 3 An enlarged schematic diagram of the local structure at A in the figure.
[0019] Figure 5 A structure diagram of the caustic soda unloading device provided by the embodiment of the application is shown in the figure. Figure 3 An enlarged schematic diagram of the local structure at B in the figure.
[0020] Figure 6 A connection structure diagram between the conveying pipe and the caustic soda tank in the caustic soda unloading device provided by the embodiment of the application is shown in the figure.
[0021] Figure 7 A structure diagram of the caustic soda unloading device provided by the embodiment of the application is shown in the figure. Figure 6 An enlarged schematic diagram of the local structure at C in the figure.
[0022] BRIEF DESCRIPTION OF DRAWINGS
[0023] 1, negative pressure tank; 2, conveying pipe; 3, caustic soda tank; 4, liquid level meter; 5, unloading valve; 6, feeding valve; 7, unloading pump; 8, first sealing member; 9, second sealing member;
[0024] 10, the alkali unloading device; 11, the discharge port; 12, the exhaust port; 13, the first sealing groove; 21, the flow guide groove; 31, the second sealing groove; 20, the sealing body; 30, the first sealing part; 40, the second sealing part. DETAILED DESCRIPTION
[0025] The technical solutions in the present application will be described in detail below with reference to the drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B: "and / or" in the text only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.
[0026] Hereinafter, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features.
[0027] At present, in the wastewater treatment system of the electrolytic aluminum plant, when the tank car unloads the liquid alkali, the tank car conveying pipe is directly connected with the unloading pump of the wastewater treatment system, and the liquid alkali is conveyed. After the liquid alkali is conveyed, there is still some liquid alkali remaining in the tank car conveying pipe, and the staff may be injured when disassembling the connecting port.
[0028] Therefore, the present application provides a kind of liquid alkali unloading device and the electrolytic aluminum plant wastewater treatment system using the device, which can avoid the liquid alkali remaining in the tank car conveying pipe to some extent.
[0029] The embodiments of the present application will be described in detail below with reference to the drawings and specific embodiments.
[0030] Please see Figure 1 and Figure 2 , Figure 1 the structure diagram of the liquid alkali unloading device provided by the embodiments of the present application, Figure 2 the top view of the negative pressure tank in the liquid alkali unloading device provided by the embodiments of the present application. As Figure 1 and Figure 2As shown, the embodiment provides a kind of unloading device 10 for liquid caustic soda, including negative pressure tank 1, electrically connected sensor (not shown in the figure) and electric valve (not shown in the figure), conveying pipe 2 and liquid caustic soda tank 3, negative pressure tank 1 has the unloading port 11 for with the unloading pipe of liquid caustic soda tank truck butt joint, and top end has a vent 12;Sensor is arranged on negative pressure tank 1, for detecting the liquid level of liquid caustic soda in negative pressure tank 1, and the opening and closing of electric valve is controlled, to open or close vent 12;Conveying pipe 2 one end is connected with the bottom of negative pressure tank 1 and communicates;The top of liquid caustic soda tank 3 is connected with the other end of conveying pipe 2 and communicates.
[0031] In this way, after liquid caustic soda tank truck reaches the scene, unloading pipe is butt jointed with unloading port 11, vent 12 is closed by the control relationship between sensor and electric valve when liquid level reaches high liquid level, liquid caustic soda enters liquid caustic soda tank 3 through conveying pipe 2 to complete liquid caustic soda unloading process, and residual liquid caustic soda in conveying pipe 2 can flow into negative pressure tank 1 along conveying pipe 2 after liquid caustic soda unloading is completed, to avoid liquid caustic soda scattering on the ground and contacting with workers, to avoid injury to workers to some extent.
[0032] And in order to make the staff outside also know the liquid level condition in negative pressure tank 1, the unloading device 10 for liquid caustic soda provided by the embodiment further includes liquid level gauge 4, and the liquid level gauge 4 is arranged on the side wall of negative pressure tank 1.In this way, the liquid level condition in negative pressure tank 1 can also be observed by workers through the arrangement of liquid level gauge 4, and vent 12 can be opened or closed in a manual mode when sensor fails.
[0033] Need to be explained is that the above-mentioned high liquid level can be understood as more than two-thirds position on liquid level gauge 4.
[0034] Generally, in order to make liquid caustic soda flow into liquid caustic soda tank 3 from unloading port 11 through conveying pipe 2, unloading valve 5 is arranged at unloading port 11, feeding valve 6 and unloading pump 7 are arranged on conveying pipe 2.
[0035] Specifically, after liquid caustic soda tank truck reaches the scene, unloading pipe is butt jointed with unloading port 11, unloading valve 5 and feeding valve 6 are opened after butt joint is completed, vent 12 is closed when the liquid level in negative pressure tank 1 reaches high liquid level, unloading pump 7 is started, liquid caustic soda enters liquid caustic soda tank 3 through conveying pipe 2 to complete liquid caustic soda unloading process, and residual liquid caustic soda in conveying pipe 2 can flow into negative pressure tank 1 along conveying pipe 2 after liquid caustic soda unloading is completed, to avoid liquid caustic soda scattering on the ground and contacting with workers, to avoid injury to workers to some extent.
[0036] In some specific embodiments, the negative pressure tank 1 can be made of 304 stainless steel, the conveying pipe 2 can be made of 304 stainless steel and the diameter can be 50 mm, and the discharge valve 5 and the feeding valve 6 are also made of 304 stainless steel and the diameter is 50 mm. In this regard, the material and size of the negative pressure tank 1, the conveying pipe 2, the discharge valve 5 and the feeding valve 6 are not specifically limited.
[0037] Please refer to Figure 3 and Figure 4 , Figure 3 the connection structure between the negative pressure tank and the conveying pipe in the liquid caustic soda unloading device provided by the embodiments of the present application, Figure 4 is Figure 3 the enlarged schematic view of the local structure at A in FIG. 1. In some embodiments, in order to enable more liquid caustic soda in the conveying pipe 2 to flow into the negative pressure tank 1, a flow guide groove 21 can be arranged at the bottom of the conveying pipe 2, and the groove bottom wall of the flow guide groove 21 extends downward in the direction close to the negative pressure tank 1. In this way, by arranging the flow guide groove 21, more liquid caustic soda in the conveying pipe 2 can flow into the negative pressure tank 1 more quickly, and the harm to the workers caused by the accumulation of liquid caustic soda in the conveying pipe 2 can be further avoided to a certain extent.
[0038] In order to enable the liquid caustic soda on the wall of the conveying pipe 2 to flow into the flow guide groove 21 quickly, in some embodiments, the side wall of the flow guide groove 21 is an inclined wall surface, and the lower end of the side wall of the flow guide groove 21 extends obliquely in the direction close to the negative pressure tank 1. In this way, the liquid caustic soda on the wall of the conveying pipe 2 can flow into the flow guide groove 21 quickly, and the accumulation of more liquid caustic soda in the conveying pipe 2 can be further avoided.
[0039] Please refer to Figures 5 to 7 , Figure 5 is Figure 3 the enlarged schematic view of the local structure at B in FIG. 1, Figure 6 the connection structure between the conveying pipe and the liquid caustic soda tank in the liquid caustic soda unloading device provided by the embodiments of the present application, Figure 7 is Figure 6 the enlarged schematic view of the local structure at C in FIG. 1. In the conveying process of the liquid caustic soda, in order to avoid the leakage of the liquid caustic soda from the connection between the conveying pipe 2 and the negative pressure tank 1 or from the connection between the top of the conveying pipe 2 and the liquid caustic soda tank 3 to a certain extent, a first sealing member 8 is arranged between one end of the conveying pipe 2 and the bottom of the negative pressure tank 1, and a second sealing member 9 is arranged between the other end of the conveying pipe 2 and the top of the liquid caustic soda tank 3. In this way, by arranging the first sealing member 8 and the second sealing member 9, the leakage of the liquid caustic soda from the connection between the conveying pipe 2 and the negative pressure tank 1 or from the connection between the top of the conveying pipe 2 and the liquid caustic soda tank 3 can be avoided to a certain extent.
[0040] In some embodiments, the first seal 8 and the second seal 9 can each be a sealing sleeve, and the first seal 8 and the second seal 9 can have the same shape.
[0041] For example, the first seal 8 and the second seal 9 can each include a sealing body 20 in the shape of a ring, a first sealing portion 30 connected to an inner circumferential wall of the sealing body 20, and a plurality of first sealing portions 30 spaced apart along an axial direction of the sealing body 20, and a second sealing portion 40 connected to an outer circumferential wall of the sealing body 20.
[0042] The first seal 8 is provided with the plurality of first sealing portions 30 abutting against the outer wall surface of the delivery pipe 2 and the second sealing portion 40 abutting against a groove bottom wall of the first sealing groove 13. The second seal 9 is provided with the plurality of first sealing portions 30 abutting against the outer wall surface of the delivery pipe 2 and the second sealing portion 40 abutting against a groove bottom wall of the second sealing groove 31. The shapes of the first seal 8 and the second seal 9 are not limited.
[0043] The embodiment also provides an electrolytic aluminum plant wastewater treatment system including the caustic soda unloading device 10 in the above-described embodiments. The caustic soda unloading device 10 has been described in detail in the above-described embodiments, and thus is not described herein.
[0044] It should be noted that the electrolytic aluminum plant wastewater treatment system provided by the embodiment further includes other modules or devices, which are not limited herein.
[0045] In the drawings of the embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right” are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary description, and cannot be understood as a limitation on the present patent, and for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.
[0046] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A discharge device for liquid caustic, characterized by, The device comprises: a negative pressure tank having a discharge port for being connected with a discharge pipe of a liquid caustic soda tank truck, and having an exhaust port at a top end thereof; an electrically connected sensor and electrically operated valve, the sensor being arranged on the negative pressure tank for detecting a liquid level of the liquid caustic soda in the negative pressure tank, and the electrically operated valve being controlled to open or close the exhaust port; a conveying pipe having one end connected with and communicated with a bottom of the negative pressure tank; and a liquid caustic soda tank having a top end connected with and communicated with the other end of the conveying pipe.
2. The unloading device for liquid caustic according to claim 1, characterized by A liquid level gauge is further arranged on a side wall of the negative pressure tank.
3. The alkali unloading device according to claim 1, wherein A discharge valve is arranged at the discharge port.
4. The alkali unloading device according to claim 1, wherein An inlet valve and a discharge pump are arranged on the conveying pipe.
5. The alkali-liquid unloading device according to any one of claims 1 to 4, characterized by The bottom of the conveying pipe is provided with a flow guide groove, and a groove bottom wall of the flow guide groove extends downward in a direction close to the negative pressure tank.
6. The alkali unloading device according to claim 5, wherein A side wall of the flow guide groove is an inclined wall surface, and a lower end of the side wall of the flow guide groove extends obliquely in a direction close to the negative pressure tank.
7. The alkali-liquid unloading device according to any one of claims 1 to 4, characterized by A first sealing member is arranged between one end of the conveying pipe and the bottom of the negative pressure tank.
8. The alkali unloading device according to claim 7, wherein A second sealing member is arranged between the other end of the conveying pipe and the top of the liquid caustic soda tank.
9. The alkali unloading device according to claim 8, wherein The first sealing member and the second sealing member are both sealing sleeves.
10. An electrolytic aluminium plant wastewater treatment system characterised in that, The device comprises the discharge device for liquid caustic soda according to any one of claims 1 to 9.