Overflow system for alkali-containing wastewater

Abstract

The utility model discloses an alkali-containing wastewater overflow system which comprises a liquid supply assembly and a plurality of tank bodies, the tank bodies are suitable for storing washing liquid, the plurality of tank bodies are communicated in sequence, the upper part of each tank body is provided with an overflow port, the overflow port is communicated to the next tank body in sequence through an overflow pipe, the overflow port is provided with a filter screen, and the filter screen is connected with the tank body. A glass observation window is arranged at the lower part of the tank body, a valve is arranged at an outlet of the tank body, and the liquid supply assembly is suitable for inputting ammonia distillation wastewater to the lower parts of all the tank bodies. According to the invention, the low-alkalinity water washing liquid can be converted into the high-alkalinity solution, so that the high-alkalinity water washing liquid has a selling value and is low in treatment cost and high in efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of rare earth ore treatment equipment and relates to an overflow system for alkali-containing wastewater. Background Art

[0002] When treating rare earth residues by alkali roasting, the low-alkalinity washing liquid generated during multiple water washings contains a large amount of phosphate ions, fluoride ions and hydroxide ions. At present, evaporation and concentration are mostly used to increase the alkalinity so that it has sales value. However, this method has high treatment costs and low efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an overflow system for alkali-containing wastewater, which can convert low-alkalinity washing liquid into high-alkalinity solution, making it have selling value, with low treatment cost and high efficiency.

[0004] The technical solution adopted by the utility model is as follows:

[0005] An overflow system for alkali-containing wastewater includes a liquid supply component and several tanks. The tanks are suitable for storing washing liquid. The several tanks are connected in sequence. An overflow port is arranged at the upper part of the tank. The overflow port is connected to the next tank in sequence through an overflow pipe. A filter screen is arranged at the overflow port. A glass observation window is arranged at the lower part of the tank. A valve is arranged at the outlet of the tank. The liquid supply component is suitable for inputting ammonia-steaming wastewater to the lower parts of all the tanks.

[0006] Furthermore, the tank also includes a stirring device configured to stir the stored liquid.

[0007] Furthermore, the stirring device includes a motor and a stirrer connected to the driving end of the motor. The motor is mounted above the tank, and the stirrer extends into the tank.

[0008] Furthermore, the stirrer extends to the lower inner part of the tank.

[0009] Furthermore, the space above the lowest point stirred by the stirrer accounts for 80%-90% of the total space of the tank.

[0010] Furthermore, the space above the lowest point stirred by the stirrer accounts for 85±1% of the total space of the tank.

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

[0012] The overflow system of the present utility model includes a liquid supply component and several tanks. In the washing liquid stored in the tanks, there are a large number of phosphate ions, fluoride ions and hydroxide ions. When injecting ammonia distillation wastewater into the tanks through the liquid supply component, since there are relatively many calcium ions and hydroxide ions in the ammonia distillation wastewater, after being introduced into the tanks, the calcium ions are captured by the phosphate ions and fluoride ions to form precipitates, thereby releasing more hydroxide ions and increasing the alkalinity of the solution. Through the action of overflow, the calcium ion precipitates are continuously removed, thereby continuously increasing the alkalinity. It can convert the low-alkalinity washing liquid into a high-alkalinity solution, making it have a selling value, with low treatment cost and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings, where:

[0014] Figure 1 FIG. is a schematic structural diagram of an overflow system for alkaline wastewater in an embodiment of the present utility model.

[0015] Markings in the figure:

[0016] 10 - tank; 11 - overflow port; 12 - filter screen; 13 - overflow pipe; 14 - glass observation window;

[0017] 20 - stirring device; 21 - motor; 22 - stirrer;

[0018] 30 - liquid supply component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the detailed description of the embodiments of the present utility model provided in the following drawings is not intended to limit the scope of the claimed present utility model, but only represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0021] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0022] As described in the background art, when rare earth residue is treated by alkaline roasting, the washing liquid with low alkalinity produced by multiple washings contains more phosphate ions, fluoride ions and hydroxide ions. Currently, evaporation and concentration are often used to increase the alkalinity so that it has sales value. However, this treatment method is costly and inefficient.

[0023] Based on this, the inventors created an overflow system for alkaline wastewater of the present application to solve the above technical problems.

[0024] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0025] Example

[0026] See also Figure 1, an overflow system for alkaline wastewater, comprising a liquid supply component 30 and several tanks 10, where the tanks 10 are suitable for storing washing liquid. Here, the washing liquid refers to the liquid generated during the multi - step washing of the roasted product after the alkaline roasting treatment of rare earth residues. The washing liquid generated in the previous several washes has a relatively high alkalinity, while the washing liquid generated in the subsequent several washes has a relatively low alkalinity. The washing liquid used this time is the washing liquid with a low alkalinity. For example, it can be the washing liquid from the third wash and subsequent washes. Several of the tanks 10 are connected in sequence. An overflow port 11 is provided at the upper part of the tank 10, and the overflow port 11 is connected to the next tank 10 in sequence through an overflow pipe 13. A filter screen 12 is provided at the overflow port 11. A glass observation window 14 is provided at the lower part of the tank 10. A valve is provided at the outlet of the tank 10. The liquid supply component 30 is suitable for inputting ammonia - stripping wastewater into the lower parts of all the tanks 10. Here, by setting the filter screen 12, the generated precipitate can be blocked to prevent it from entering the subsequent tanks 10. By setting the glass observation window 14, it is convenient to observe the position of the precipitate in the tank 10, so that the precipitate can be discharged through the valve in a timely manner. For example, the overflow system may further include a camera assembly and a controller. The camera assembly is arranged outside the glass observation window 14. The camera assembly can identify the liquid level of the precipitate. The input end of the controller is connected to the camera assembly, and the output end is connected to the valve, so as to automatically control the valve to discharge the precipitate.

[0027] The overflow system of the present utility model includes a liquid supply component 30 and several tanks 10. In the washing liquid stored in the tanks 10, there are a large number of phosphate ions, fluoride ions and hydroxide ions. When ammonia - stripping wastewater is injected into the tanks 10 through the liquid supply component 30, since the ammonia - stripping wastewater contains more calcium ions and hydroxide ions, after entering the tanks 10, the calcium ions are captured by the phosphate ions and fluoride ions to form precipitates, thereby releasing more hydroxide ions and increasing the alkalinity of the solution. Through the action of overflow, the calcium ions are continuously precipitated, so as to continuously increase the alkalinity, and the low - alkalinity washing liquid can be converted into a high - alkalinity solution, making it have a selling value, with low treatment cost and high efficiency.

[0028] In another embodiment, the tank 10 further includes a stirring device 20 configured to stir the stored liquid. By setting the stirring device 20, the mixing degree of the ammonia - stripping wastewater and the washing liquid can be improved, so as to achieve sufficient precipitation and displace more hydroxide ions.

[0029] In another embodiment, the stirring device 20 includes a motor 21 and a stirrer 22 connected to the driving end of the motor 21. The motor 21 is mounted above the tank 10, and the stirrer 22 extends into the tank 10. Preferably, the stirrer 22 extends to the lower inner part of the tank 10.

[0030] In another embodiment, the space above the lowest point stirred by the stirrer 22 accounts for 80%-90% of the total space of the tank body 10. In this way, during stirring, the upper space is in the main stirring area, and the disturbance to the lower space is small, which is convenient for the generated sediment to sink by standing still and is convenient for discharging. Preferably, the space above the lowest point stirred by the stirrer 22 accounts for 85±1% of the total space of the tank body 10.

[0031] The above are only the preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, and improvements made by those skilled in the art within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An overflow system for alkaline wastewater, characterized in that, It includes a liquid supply assembly and several tanks. The tanks are suitable for storing washing liquid. The several tanks are connected in sequence. An overflow port is provided at the upper part of the tank. The overflow port is connected to the next tank in sequence through an overflow pipe. A filter screen is provided at the overflow port. A glass observation window is provided at the lower part of the tank. A valve is provided at the outlet of the tank. The liquid supply assembly is suitable for inputting ammonia stripping wastewater into the lower parts of all the tanks.

2. The overflow system for alkaline wastewater according to claim 1, wherein The tank further includes a stirring device configured to stir the stored liquid.

3. The overflow system for alkaline wastewater according to claim 2, characterized in that, The stirring device includes a motor and a stirrer connected to the driving end of the motor. The motor is mounted above the tank, and the stirrer extends into the tank.

4. The overflow system for alkaline wastewater according to claim 3, characterized in that, The stirrer extends to the lower inner part of the tank.

5. An overflow system for alkaline wastewater according to claim 4, characterized in that, The space above the lowest point stirred by the stirrer accounts for 80%-90% of the total space of the tank.

6. The overflow system for alkaline wastewater according to claim 5, wherein The space above the lowest point stirred by the stirrer accounts for 85±1% of the total space of the tank.

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