Washing system for secondary aluminum ash treatment
By using a dual cooling system with spiral cooling pipelines and annular shower in the secondary aluminum ash treatment equipment, combined with external water source dilution and double cooling treatment of fin radiator, the heat overflow and ammonia generation problems caused by aluminum thermal reaction are solved. , protects equipment and realizes the secondary utilization of water resources.
Patent Information
- Application Number
- CN202420847138.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The existing secondary aluminum ash treatment equipment cannot effectively handle heat overflow and ammonia caused by aluminum thermal reaction during the washing process, resulting in changes in air pressure and damage to the tank wall.
A washing system including a scrubber, a fin radiator and a water tower was designed to achieve dual cooling and ammonia water recovery through spiral cooling lines and annular shower, dilute ammonia water with an external water source, and combine it with a fin radiator for double cooling treatment.
It effectively reduces the temperature in the scrubber, avoids the reduction of cooling effect, realizes the secondary utilization of water resources, and reduces ammonia emissions through dilution and cooling treatment, protects the equipment.
Smart Images
Figure CN222220698U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of secondary aluminum ash processing equipment, in particular to a washing system for secondary aluminum ash processing. Background Art
[0002] Aluminum ash is waste slag generated in the production process of the aluminum industry, and is divided into primary aluminum ash and secondary aluminum ash. Except for the difference in aluminum content, the two types of aluminum ash have similar material compositions, and their environmental hazard characteristics are both reactive. Some aluminum ashes also have leaching toxicity or release flammable gases when in contact with water. The treatment includes harmless processes and resource-based processes, among which the harmless process of aluminum ash hazardous waste disposal scheme: through acid leaching, alkali leaching, washing and other methods, the nitrides, fluorides, salts and other impurities in the secondary aluminum ash are removed to obtain harmless aluminum ash, which is then safely landfilled. Resource-based process: After removing toxic and hazardous substances, the secondary aluminum ash is processed through high temperature or cold processing to make different products such as steel claw protection rings, brown corundum abrasives, refining agents and water purifiers, or returned to the electrolytic cell as raw materials for electrolytic aluminum;
[0003] Among them, most of the existing treatment methods adopt the method of adding oxidizing agent and reducing agent, then smelting at high temperature in a rotary kiln, and then cooling, crushing and ball milling to obtain calcium aluminate powder. Calcium aluminate powder can be used as a blast furnace slag remover and fire extinguishing agent, and is a very economical material. This not only makes the secondary aluminum ash harmless, but also creates a certain economic effect. Among them, the waste aluminum ash will produce ammonia when it is placed in the air, which can be released in advance through water washing and purification to reduce pollution;
[0004] However, in actual use, during the washing process, an aluminum thermite reaction will occur. Although the heat generated will disappear quickly, a large amount of heat will overflow during the washing process and ammonia will be produced. The existing equipment can only be processed and collected through a washing tower, but the existing equipment does not have a good way to deal with the aluminum thermite phenomenon. A large amount of heat will cause the gas to expand, thereby increasing the air pressure. When the work is completed, the cooled gas will reduce the air pressure, causing damage to the tank wall. Utility Model Content
[0005] The utility model aims to provide a washing system for secondary aluminum ash treatment to solve the problems raised in the above background technology.
[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a washing system for secondary aluminum ash treatment, comprising a washing tower, a finned radiator and a water tower connected to a pipeline for conveying an external water source, the washing tower comprising an outer tower tube, a middle tower tube sleeved in the outer tower tube and an inner tower tube arranged in the middle tower tube, a cooling pipeline with an input end passing through the outer tower tube and connected to an output end of the finned radiator is spirally arranged on the outer wall of the middle tower tube, the output end of the cooling pipeline passes through the top of the outer tower tube and the top of the middle tower tube in turn, and is connected to the top of the inner wall of the inner tower tube, the top of the inner wall of the middle tower tube An annular showerhead sealedly connected to the top of the inner tower is provided, the annular showerhead is connected to the cooling pipeline through a diverter pipe penetrating the top of the inner wall of the middle tower, a plurality of exhaust holes are arranged at equal intervals along the circumferential direction on the outer wall of the inner tower at the bottom end of the annular showerhead, a discharge barrel penetrating through and extending out of the outer tower is provided at the bottom end of the middle tower, a discharge port penetrating through and extending out of the discharge barrel is provided at the bottom end of the inner tower, the output end of the discharge barrel is connected to the water tower through a reflux pipeline, the input end of the finned radiator is connected to the water tower through a water supply pipeline, and water supply pumps are provided on both the reflux pipeline and the water supply pipeline.
[0007] Furthermore, the top of the inner tower is configured in a conical shape.
[0008] Furthermore, a solenoid valve is provided on the delivery pipeline.
[0009] Furthermore, two upper and lower liquid level sensors are respectively provided on the outer wall of the water tower.
[0010] Furthermore, a shower head connected to the output end of the cooling pipeline is arranged at the top of the inner wall of the inner tower.
[0011] Furthermore, the bottom end of the shower head is arranged in an arc shape convex downward.
[0012] Furthermore, the bottom end of the washing tower is configured in a conical shape.
[0013] The beneficial effects achieved by the utility model are as follows: the washing tower is double cooled by the spirally arranged cooling pipeline and the flow of ammonia water, and the ammonia water is recovered and mixed and diluted with an external water source, thereby realizing the secondary utilization of water resources. At the same time, the double cooling of the mixed water by the water pipeline and the fin radiator also effectively avoids the problem of reduced cooling effect of the washing tower caused by the mixed water. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of a washing system for secondary aluminum ash treatment in an embodiment. DETAILED DESCRIPTION
[0015] The utility model is further described below in conjunction with the accompanying drawings.
[0016] like Figure 1 As shown, the utility model discloses a washing system for secondary aluminum ash treatment, comprising: a washing tower 1, a finned radiator 2 and a water tower 3 connected to a pipeline 4 for conveying an external water source, the washing tower 1 comprising an outer tower 11, a middle tower 12 sleeved in the outer tower 11 and an inner tower 13 arranged in the middle tower 12, a cooling pipeline 5 whose input end passes through the outer tower 11 and is connected to the output end of the finned radiator 2 is spirally arranged on the outer wall of the middle tower 12, the output end of the cooling pipeline 5 passes through the top of the outer tower 11 and the top of the middle tower 12 in turn, and is connected to the top of the inner wall of the inner tower 13, the top of the inner wall of the middle tower 12 is provided with an annular spiral connected to the top of the inner tower 13 Sprinkler 121, the annular shower 121 is connected with the cooling pipeline 5 through the shunt pipe 51 penetrating the top of the inner wall of the middle tower 12, a plurality of exhaust holes 132 are arranged at equal intervals along the circumferential direction on the outer wall of the inner tower 13 located at the bottom end of the annular shower 121, a discharge barrel 122 penetrating through and extending out of the outer tower 11 is arranged at the bottom end of the middle tower 12, a discharge port 131 penetrating through and extending out of the discharge barrel 122 is arranged at the bottom end of the inner tower 13, the output end of the discharge barrel 122 is connected with the water tower 3 through the reflux pipeline 6, the input end of the finned radiator 2 is connected with the water tower 3 through the water supply pipeline 7, the reflux pipeline 6 and the water supply pipeline 7 are both provided with water pumps, and the top of the water tower 3 is provided with an exhaust port for pressure relief.
[0017] Further, such as Figure 1 As shown, in order to prevent ammonia from being unable to be discharged into the middle tower in time, the top of the inner tower 13 is set in a cone shape. When ammonia gathers at the top of the inner tower 13, the cone-shaped top is conducive to guiding the ammonia to the exhaust hole 132.
[0018] Further, such as Figure 1 As shown, in order to control the water injection amount to the water tower 3 , a solenoid valve 41 is provided on the delivery pipeline 4 .
[0019] Further, such as Figure 1 As shown, in order to prevent the water level in the water tower from being too high / low, the water tower 3 is provided with an upper / lower liquid level sensor 31 / 32 which is electrically connected to the solenoid valve 123. When the upper liquid level sensor 31 is triggered, the solenoid valve 123 is closed, and when the lower liquid level sensor 32 is triggered, the solenoid valve 123 is opened.
[0020] Further, such as Figure 1 As shown, in order to make the water react evenly with the secondary aluminum ash, a shower head 133 connected to the output end of the cooling pipeline 5 is provided at the top of the inner wall of the inner tower 13 .
[0021] Further, such as Figure 1 As shown, in order to further guide the ammonia gas, the bottom end of the shower head 133 is arranged in a downwardly convex arc shape.
[0022] Further, such as Figure 1 As shown, in order to increase the centralized discharge effect of ammonia water and secondary aluminum ash, the bottom end of the washing tower 1 is set in a conical shape.
[0023] Based on the above structure, Figure 1 As shown, when in use, the water tower is filled with water through the delivery pipeline 4, and then the secondary aluminum ash is injected into the inner tower 13, and at the same time, the water delivery pump on the water delivery pipeline 7 is started to inject the water in the water tower into the cooling pipeline 5 until it is delivered to the inner tower 12 to contact with the secondary aluminum ash and produce an aluminum heat reaction. Since the cooling pipeline 5 is spirally arranged, the water flow will carry part of the heat during the water delivery process;
[0024] Ammonia generated during the thermite reaction rises to the top of the inner tower 13 as a result of the vaporization reaction when water contacts the secondary aluminum, and is discharged into the middle tower 12 through the exhaust hole 132. When the cooling pipeline 5 transports water, part of the water is transported to the annular shower head through the shunt pipe 51, and the water is evenly sprayed into the middle tower 12 through the annular shower head to react with the ammonia, thereby producing ammonia water. Due to gravity, the ammonia water flows downward along the inner wall of the middle tower 12 and the outer wall of the inner tower 13, and further takes away the heat generated by the thermite reaction during the flow of the ammonia water.
[0025] As the ammonia water flows downward, it will eventually fall into the discharge barrel 122. At this time, the water pump on the reflux pipeline 6 will pump out the ammonia water in the discharge barrel 122, and transport it to the water tower to mix with the external water source, and then transport the water to the cooling pipeline 5 through the water pipeline 7 for secondary use (ammonia water is diluted after mixing with the external water source);
[0026] When the mixed water is transported to the cooling pipeline 5 , the outer wall of the water pipeline 7 comes into contact with the air, which cools the water in the pipeline. At the same time, the mixed water is further cooled when passing through the fin radiator 2 .
[0027] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.
Claims
1. A washing system for secondary aluminum ash treatment, comprising a washing tower (1), characterized in that: It also includes a finned heat sink (2) and a water tower (3) connected to a pipeline (4) for conveying an external water source. The washing tower (1) includes an outer tower (11), a middle tower (12) sleeved in the outer tower (11), and an inner tower (13) arranged in the middle tower (12). A cooling pipeline (5) is spirally arranged on the outer wall of the middle tower (12), the input end of which passes through the outer tower (11) and is connected to the output end of the finned heat sink (2). The output end of the cooling pipeline (5) passes through the top of the outer tower (11) and the top of the middle tower (12) in sequence, and is connected to the top of the inner wall of the inner tower (13). The top of the inner wall of the middle tower (12) is provided with an annular shower (121) which is sealed and connected to the top of the inner tower (13). The annular shower (121) is connected to the cooling pipeline (5) through a branch pipe (51) penetrating the top of the inner wall of the middle tower (12); a plurality of exhaust holes (132) are arranged at equal intervals along the circumferential direction on the outer wall of the inner tower (13) at the bottom end of the annular shower (121); a discharge barrel (122) penetrating and extending out of the outer tower (11) is arranged at the bottom end of the middle tower (12); a discharge port (131) penetrating and extending out of the discharge barrel (122) is arranged at the bottom end of the inner tower (13); the output end of the discharge barrel (122) is connected to the water tower (3) through a return pipeline (6); the input end of the finned heat sink (2) is connected to the water tower (3) through a water supply pipeline (7); and water supply pumps are arranged on both the return pipeline (6) and the water supply pipeline (7).
2. A washing system for secondary aluminum ash treatment according to claim 1, characterized in that: The top end of the inner tower (13) is arranged in a conical shape.
3. A washing system for secondary aluminum ash treatment according to claim 1, characterized in that: The delivery pipeline (4) is provided with a solenoid valve (41).
4. A washing system for secondary aluminum ash treatment according to claim 1, characterized in that: The outer wall of the water tower (3) is provided with upper and lower liquid level sensors (31 / 32) respectively.
5. The washing system for secondary aluminum ash treatment according to claim 1, characterized in that: A shower head (133) connected to the output end of the cooling pipeline (5) is provided at the top of the inner wall of the inner tower (13).
6. A washing system for secondary aluminum ash treatment according to claim 5, characterized in that: The bottom end of the shower head (133) is arranged in an arc shape that bulges downward.
7. A washing system for secondary aluminum ash treatment according to any one of claims 1 to 6, characterized in that: The bottom end of the washing tower (1) is arranged in a conical shape.