Solid-liquid separation and recovery system for hydrogen storage alloy

Abstract

The utility model discloses a solid-liquid separation and recovery system for hydrogen storage alloy, which comprises a hydrogen storage alloy wastewater production module, a wastewater filtering module, a recovered liquid storage module and a control module, and the wastewater filtering module comprises a waste liquid precipitation and separation device, a recovered liquid filtering device and a security filter; the output end of the hydrogen storage alloy wastewater production module is communicated with the input end of the waste liquid precipitation separation device, the output end of the waste liquid precipitation separation device is communicated with the input end of the recovered liquid filtering device, and the output end of the recovered liquid filtering device is communicated with the input end of the security filter; the output end of the security filter is communicated with the input end of the recovered liquid storage module, and the output end of the recovered liquid storage module is communicated with the input end of the hydrogen storage alloy wastewater production module. According to the scheme, the wastewater is subjected to multiple filtration treatment, so that the treated wastewater can be reused, and the problems that the environment is seriously polluted and the water resource is greatly wasted due to direct discharge of the traditional wastewater are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a solid liquid separation recovery system for hydrogen storage alloy technical field, specifically a solid liquid separation recovery system for hydrogen storage alloy. BACKGROUND

[0002] In today's hydrogen storage alloy production field, wet grinding technology is a commonly used incoming material processing means. Its basic principle is to use liquid medium and grinding medium interaction, so that the hydrogen storage alloy is gradually refined in the grinding process, to meet the subsequent production process requirements for its particle size and other characteristics.

[0003] When using the traditional wet grinding technology to process the hydrogen storage alloy incoming material, a large amount of powder solids are mixed in the water discharged after grinding. These powder solids mainly come from the peeling and crushing of hydrogen storage alloy in the grinding process, and they are uniformly dispersed in the water, forming a complex solid-liquid mixture. If the wastewater containing powder solids is not properly treated and directly discharged, it will not only cause serious pollution to the environment, but also cause great waste of water resources. UTILITY MODEL CONTENT

[0004] In view of the above-mentioned defects, the utility model provides a solid liquid separation recovery system for hydrogen storage alloy, which can be reused after multiple filtration treatment, solving the problem of traditional wastewater direct discharge causing serious pollution to the environment and great waste of water resources.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] A solid liquid separation recovery system for hydrogen storage alloy, comprising a hydrogen storage alloy wastewater production module, a wastewater filtration module, a recovery liquid storage module and a control module, the wastewater filtration module comprising a waste liquid precipitation separation device, a recovery liquid filtration device and a security filter;

[0007] The output end of the hydrogen storage alloy wastewater production module is in communication with the input end of the waste liquid precipitation separation device, the output end of the waste liquid precipitation separation device is in communication with the input end of the recovery liquid filtration device, the output end of the recovery liquid filtration device is in communication with the input end of the security filter, the output end of the security filter is in communication with the input end of the recovery liquid storage module, and the output end of the recovery liquid storage module is in communication with the input end of the hydrogen storage alloy wastewater production module.

[0008] The input end of the waste liquid precipitation separation device is located on the front wall of the waste liquid precipitation separation device, and the output end of the waste liquid precipitation separation device is located on the rear wall of the waste liquid precipitation separation device.

[0009] The waste liquid precipitation separation device is sequentially provided with mutually parallel baffles, a first filter screen and a second filter screen in the front-rear direction, and the left and right ends of the baffles, the first filter screen and the second filter screen are fixedly connected with the inner wall of the waste liquid precipitation separation device respectively;

[0010] The baffles have gaps with the bottom wall of the waste liquid precipitation separation device, and the first filter screen and the second filter screen are fixedly connected with the bottom of the waste liquid precipitation separation device.

[0011] The front wall of the waste liquid precipitation separation device is provided with a first solid waste collection box between the baffles, the baffles and the first filter screen are provided with a second solid waste collection box between the baffles and the first filter screen, the first filter screen and the second filter screen are provided with a third solid waste collection box between the first filter screen and the second filter screen, and the second filter screen and the rear wall of the waste liquid precipitation separation device are provided with a fourth solid waste collection box between the second filter screen and the rear wall of the waste liquid precipitation separation device.

[0012] The rear wall of the waste liquid precipitation separation device is sequentially provided with a first liquid level meter, a second liquid level meter and a third liquid level meter from top to bottom, and the first liquid level meter, the second liquid level meter and the third liquid level meter jointly identify the water level of the waste liquid precipitation separation device.

[0013] The output end of the waste liquid precipitation separation device is located between the second liquid level meter and the third liquid level meter, and the waste liquid precipitation separation device is provided with a first overflow pipe above the first liquid level meter.

[0014] The control module is electrically connected with the first liquid level meter, the second liquid level meter and the third liquid level meter respectively.

[0015] The recovery liquid filtering device comprises a hollow barrel and a hollow solid waste storage barrel, the bottom of the barrel and the top of the solid waste storage barrel are in communication with each other, and the bottom of the solid waste storage barrel is connected with a blowdown pipe;

[0016] The barrel is provided with a vertical partition plate and a horizontal filter screen, the vertical partition plate vertically separates the left and right ends of the barrel, the right end of the horizontal filter screen is connected with the vertical partition plate perpendicularly, and the left end of the horizontal filter screen is connected with the barrel wall perpendicularly.

[0017] The input end of the recovery liquid filtering device is located at the right end of the barrel.

[0018] The output end of the recovery liquid filtering device is located at the left end of the barrel.

[0019] The left end of the barrel is sequentially provided with a fourth liquid level meter, a fifth liquid level meter and a sixth liquid level meter from top to bottom, and the fourth liquid level meter, the fifth liquid level meter and the sixth liquid level meter jointly identify the water level of the barrel.

[0020] The output end of the recovery liquid filtering device is located between the fifth liquid level meter and the sixth liquid level meter; the top part of the right end of the barrel is provided with a second overflow pipe;

[0021] The control module is electrically connected with the fourth liquid level meter, the fifth liquid level meter and the sixth liquid level meter respectively.

[0022] The cross-sectional view of the solid waste accumulation barrel is a V-shaped structure.

[0023] The hydrogen storage alloy wastewater production module comprises a hydrogen storage alloy wet grinding device, a hydrogen storage alloy mixture buffer device and a hydrogen storage alloy alkali treatment device.

[0024] The input end of the hydrogen storage alloy wet grinding device is connected with the output end of the recovery liquid storage module, the output end of the hydrogen storage alloy wet grinding device is connected with the input end of the hydrogen storage alloy mixture buffer device, the output end of the hydrogen storage alloy mixture buffer device is connected with the input end of the hydrogen storage alloy alkali treatment device, and the output end of the hydrogen storage alloy alkali treatment device is connected with the input end of the waste liquid sedimentation separation device.

[0025] Further comprising a pure water storage device, the output end of the pure water storage device is connected with the input end of the hydrogen storage alloy wet grinding device.

[0026] The technical scheme of the utility model can have the following beneficial effects:

[0027] 1. The wastewater is subjected to multiple filtration treatment, so that the treated wastewater can be reused, solving the problem that traditional wastewater direct discharge can cause serious pollution to the environment and also cause great waste of water resources.

[0028] 2. The waste liquid sedimentation separation device can efficiently separate solid impurities in the recovery liquid through the baffles and double-layer filter screen structure arranged in sequence, improving the quality of the recovery liquid. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 is a schematic diagram of a solid-liquid separation and recovery system for hydrogen storage alloy according to one embodiment of the utility model;

[0030] Fig. 2 is a partial cross-sectional view of a waste liquid sedimentation separation device according to one embodiment of the utility model;

[0031] Fig. 3 is a partial cross-sectional view of a recovery liquid filtering device according to one embodiment of the utility model;

[0032] 1, hydrogen storage alloy wastewater production module; 11, hydrogen storage alloy wet grinding device; 12, hydrogen storage alloy mixture buffer device; 13, hydrogen storage alloy alkali treatment device; 2, wastewater filtration module; 21, waste liquid precipitation separation device; 2100, first overflow pipe; 210, baffle; 211, first filter screen; 212, second filter screen; 213, first solid waste collection box; 214, second solid waste collection box; 215, third solid waste collection box; 216, fourth solid waste collection box; 217, first liquid level meter; 218, second liquid level meter; 219, third liquid level meter; 22, recovery liquid filtration device; 220, blowdown pipe; 221, barrel; 222, solid waste storage barrel; 223, vertical partition plate; 224, horizontal filter screen; 225, fourth liquid level meter; 226, fifth liquid level meter; 227, sixth liquid level meter; 228, second overflow pipe; 23, safety filter; 3, recovery liquid storage module; 4, pure water storage device. DETAILED DESCRIPTION

[0033] The technical scheme of the present application will be further described below in combination with the drawings and through specific embodiments.

[0034] In the description of the present application, it should be understood that the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom" and the like indicate the orientation or positional relationship 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, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0036] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "splicing", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] The technical scheme of the present application will be further described below in combination with the drawings and through specific embodiments. Figs. 1 to 3 , a solid-liquid separation and recovery system for hydrogen storage alloy is described.

[0038] A solid-liquid separation and recovery system for hydrogen storage alloy waste water production module 1, waste water filtration module 2, recovery liquid storage module 3 and control module, the waste water filtration module 2 includes waste liquid precipitation separation device 21, recovery liquid filtration device 22 and security filter 23;

[0039] The output end of the hydrogen storage alloy waste water production module 1 is connected with the input end of the waste liquid precipitation separation device 21, the output end of the waste liquid precipitation separation device 21 is connected with the input end of the recovery liquid filtration device 22, the output end of the recovery liquid filtration device 22 is connected with the input end of the security filter 23, the output end of the security filter 23 is connected with the input end of the recovery liquid storage module 3, and the output end of the recovery liquid storage module 3 is connected with the input end of the hydrogen storage alloy waste water production module 1.

[0040] In the production process of hydrogen storage alloy, hydrogen storage alloy waste water production module 1 runs continuously and inevitably generates a large amount of waste water. If these waste waters are not properly treated and directly discharged, not only will it cause serious pollution to the environment, but also will cause great waste of water resources, so the present scheme is provided with waste water filtration module 2 to filter and treat the waste water.

[0041] Firstly, the waste water will flow into the waste liquid precipitation separation device 21, and due to the action of gravity, the solid impurities with larger particles in the waste water will gradually settle at the bottom of the waste liquid precipitation separation device 21, thereby realizing the preliminary separation from the liquid part. Then, the liquid after preliminary precipitation separation enters the recovery liquid filtration device 22. The recovery liquid filtration device 22 further improves the clarity and purity of the recovery liquid through its efficient filtration mechanism, so that the recovery liquid can better meet the requirements of the production process in the subsequent utilization process, and reduce the adverse effects on the production process.

[0042] Subsequently, the recovery liquid treated by the recovery liquid filtration device 22 enters the security filter 23. The security filter 23 adopts a filter membrane or filter core with extremely small pore size, which can lastly retain extremely small impurities in the recovery liquid. The water quality of the recovery liquid treated by the security filter 23 has reached a very high standard, which is almost close to the standard of pure process water, providing a solid guarantee for the subsequent recycling.

[0043] The output end of the recovery liquid storage module 3 is connected with the input end of the hydrogen storage alloy waste water production module 1, which realizes the recycling and closed loop of the waste water. The treated recovery liquid is transported back to the hydrogen storage alloy waste water production module 1, which can replace part of the fresh process water, greatly reducing the dependence on external water resources.

[0044] At the same time, the control module plays an indispensable role in coordinating and managing the entire system. It can monitor the running state of each module in real time, including the flow of wastewater, the pressure change of each filtration link, the storage capacity of the recovered liquid, and other key parameters. According to these monitoring data, the control module can accurately control the speed of each module operation, ensuring that the entire system is always in the best operating state, achieving efficient, stable, and sustainable wastewater recovery and recycling.

[0045] Therefore, the solid-liquid separation and recovery system for hydrogen storage alloy can multiple filter the wastewater, so that the treated wastewater can be reused, solving the problem that traditional wastewater direct discharge will cause serious pollution to the environment and also cause great waste of water resources.

[0046] The input end of the waste liquid sedimentation separation device 21 is located on the front wall of the waste liquid sedimentation separation device 21, and the output end of the waste liquid sedimentation separation device 21 is located on the rear wall of the waste liquid sedimentation separation device 21.

[0047] The waste liquid sedimentation separation device 21 is sequentially provided with mutually parallel baffles 210, first filter screens 211 and second filter screens 212 in the front-rear direction, and the left and right ends of the baffles 210, the first filter screens 211 and the second filter screens 212 are respectively fixedly connected with the inner walls of the waste liquid sedimentation separation device 21.

[0048] The baffle 210 has a gap with the bottom wall of the waste liquid sedimentation separation device 21, and the first filter screen 211 and the second filter screen 212 are fixedly connected with the bottom of the waste liquid sedimentation separation device 21.

[0049] After the recovered liquid enters the input end of the front wall of the waste liquid sedimentation separation device 21, it will first encounter the baffle 210. Since the baffle 210 has a gap with the bottom wall of the waste liquid sedimentation separation device 21 and the left and right ends are fixedly connected with the inner wall of the groove, the baffle 210 can effectively slow down the flow rate of the recovered liquid, so that the recovered liquid will not directly impact the subsequent first filter screen 211 and second filter screen 212 after entering the waste liquid sedimentation separation device 21 due to too fast flow rate, avoiding excessive impact and wear on the first filter screen 211 and the second filter screen 212, thereby prolonging the service life of the first filter screen 211 and the second filter screen 212, reducing equipment maintenance cost and replacement frequency.

[0050] When the recovery liquid slowly bypasses the baffle 210, the recovery liquid passes through the first filter screen 211 and the second filter screen 212 in turn. The first filter screen 211 and the second filter screen 212 are parallel to each other, and the left and right ends are fixed to the inner wall of the waste liquid precipitation separation device 21, and the bottom of the first filter screen 211 and the second filter screen 212 is fixed to the bottom of the waste liquid precipitation separation device 21, forming a stable filtering structure. This multi-layer filtering structure can gradually purify the recovery liquid. The first filter screen 211 can preliminarily intercept larger impurities in the recovery liquid, such as larger metal particles, undissolved solid substances, etc., for rough filtration of the recovery liquid. The second filter screen 212 further filters the recovery liquid filtered by the first filter screen 211 for fine filtration, which can capture smaller impurities such as fine metal oxide powder, colloidal particles, etc., significantly improving the purity of the recovery liquid.

[0051] Through the front and rear baffle 210 and double-layer filter screen structure arranged in turn, the waste liquid precipitation separation device 21 can efficiently separate the solid impurities in the recovery liquid, improving the quality of the recovery liquid.

[0052] The first solid waste collection box 213 is arranged between the front wall of the waste liquid precipitation separation device 21 and the baffle 210; the second solid waste collection box 214 is arranged between the baffle 210 and the first filter screen 211, the third solid waste collection box 215 is arranged between the first filter screen 211 and the second filter screen 212, and the fourth solid waste collection box 216 is arranged between the second filter screen 212 and the rear wall of the waste liquid precipitation separation device 21.

[0053] The first solid waste collection box 213 collects large-particle impurities when the recovery liquid enters the waste liquid precipitation separation device 21, preventing damage to the subsequent first filter screen 211 and second filter screen 212.

[0054] The second solid waste collection box 214 prevents medium-sized impurities from accumulating between the baffle 210 and the first filter screen 211, ensuring uniform meshing of the recovery liquid, facilitating solid waste classification and process optimization. The third solid waste collection box 215 precisely collects fine impurities intercepted by the second filter screen 212 after the first filter screen 211, improving the purity of the recovery liquid.

[0055] The fourth solid waste collection box 216 serves as the last line of defense, collecting a small amount of residual impurities to ensure the purity of the subsequent liquid, reduce damage to the system equipment, and ensure long-term stable operation of the system and reliable product quality.

[0056] When cleaning is needed, the operator can quickly locate and remove the corresponding solid waste collection box. Moreover, taking out from the top opening can facilitate inspection and maintenance of the specific solid waste collection box.

[0057] In addition, if the operator takes it from the bottom or side, it may cause the liquid in the device to flow out, causing pollution of the working area, and may also affect the liquid level in the device and the filtration process. While taking from the top, as long as attention is paid to avoid colliding with other structures inside the device during operation, the stability of the liquid in the device can be maintained to the greatest extent, and the entire waste liquid sedimentation separation device 21 can continue to work normally.

[0058] The rear wall of the waste liquid sedimentation separation device 21 is sequentially provided with a first liquid level meter 217, a second liquid level meter 218 and a third liquid level meter 219 from top to bottom, and the first liquid level meter 217, the second liquid level meter 218 and the third liquid level meter 219 collectively identify the water level of the waste liquid sedimentation separation device 21;

[0059] The output end of the waste liquid sedimentation separation device 21 is located between the second liquid level meter 218 and the third liquid level meter 219; and the waste liquid sedimentation separation device 21 is provided with a first overflow pipe 2100 above the first liquid level meter 217;

[0060] The control module is electrically connected with the first liquid level meter 217, the second liquid level meter 218 and the third liquid level meter 219 respectively.

[0061] The first liquid level meter 217, the second liquid level meter 218 and the third liquid level meter 219 work cooperatively to accurately and comprehensively monitor the water level condition in the waste liquid sedimentation separation device 21. The first liquid level meter 217 is located at a higher position, which functions to timely detect whether the recovered liquid approaches or reaches a high water level that may cause overflow risk. Once the water level reaches the threshold set by the first liquid level meter 217, the system will send a warning signal through the connection with the control module, and at the same time the first overflow pipe 2100 starts to work to orderly discharge the recovered liquid exceeding the safe water level, thereby effectively avoiding the overflow accident caused by excessive accumulation of recovered liquid, and ensuring the safety of the surrounding environment of the entire recovery system and the normal operation of the equipment without interference of liquid erosion.

[0062] Since the output end is located between the second liquid level meter 218 and the third liquid level meter 219, when the water level drops to the vicinity of the third liquid level meter 219, it indicates that the amount of recovered liquid in the waste liquid sedimentation separation device 21 is relatively low, and at this time the control module can flexibly adjust the inflow rate of the upstream wastewater to maintain the material balance and stable operation rhythm between the parts of the entire system. On the contrary, when the water level rises to the position of the second liquid level meter 218, it means that the recovered liquid has accumulated to an amount suitable for output for the next step of processing, and the system can ensure that the recovered liquid is delivered to the subsequent recovered liquid filtration device 22 at a stable flow rate and pressure, thereby ensuring the continuity and efficiency of the subsequent processing process.

[0063] The recovery liquid filtering device 22 comprises a hollow barrel 221 and a hollow solid waste storage barrel 222, the bottom of the barrel 221 and the top of the solid waste storage barrel 222 are in communication with each other, and the bottom of the solid waste storage barrel 222 is connected with a sewage pipe 220;

[0064] The barrel 221 is provided with a vertical partition plate 223 and a horizontal filter screen 224, the vertical partition plate 223 vertically separates the left and right ends of the barrel 221, and the right end of the horizontal filter screen 224 is connected with the vertical partition plate 223, and the left end of the horizontal filter screen 224 is connected with the barrel wall of the barrel 221;

[0065] The input end of the recovery liquid filtering device 22 is located at the right end of the barrel 221;

[0066] The output end of the recovery liquid filtering device 22 is located at the left end of the barrel 221.

[0067] After the recovery liquid enters from the right end of the barrel 221, it first enters the solid waste storage barrel 222 area under the guidance of the vertical partition plate 223. This initial path allows the recovery liquid to have a buffering and preliminary sedimentation process before entering the filtering link, so that larger particles or heavier impurities can be deposited in the solid waste storage barrel 222 bottom, reducing the subsequent filtering burden of the horizontal filter screen 224.

[0068] As the water level rises, the recovery liquid passes through the horizontal filter screen 224 and enters the left end of the barrel 221. The left and right ends of the horizontal filter screen 224 are respectively connected with the barrel 221 and the vertical partition plate 223, so that the recovery liquid must pass through the horizontal filter screen 224 to reach the output end of the recovery liquid filtering device 22. This design can prolong the sedimentation time of the recovery liquid, ensuring that even tiny solid impurities have a high probability of being intercepted by the filter screen, thereby greatly improving the filtering precision of the recovery liquid and making the finally discharged recovery liquid more pure.

[0069] The solid waste storage barrel 222 is located below the barrel 221 and is connected with it, and is specially used to collect solid impurities intercepted in the filtering process. Whether it is large particle impurities deposited at the bottom when the recovery liquid enters, or impurities falling after being intercepted by the horizontal filter screen 224, they can all enter the solid waste storage barrel 222. Its bottom is connected with the sewage pipe 220, which facilitates the periodic discharge of a large amount of solid waste, avoiding the disordered accumulation of solid impurities in the filter tank, which affects the filtering effect and normal operation of the equipment.

[0070] The left end of the barrel 221 is sequentially provided from top to bottom with a fourth liquid level meter 225, a fifth liquid level meter 226 and a sixth liquid level meter 227, and the fourth liquid level meter 225, the fifth liquid level meter 226 and the sixth liquid level meter 227 collectively identify the water level of the barrel 221;

[0071] The output end of the recovery liquid filtering device 22 is located between the fifth liquid level meter 226 and the sixth liquid level meter 227; the top part of the right end of the barrel 221 is provided with a second overflow pipe 228;

[0072] The control module is electrically connected with the fourth liquid level meter 225, the fifth liquid level meter 226 and the sixth liquid level meter 227 respectively.

[0073] Once the water level rises to the height set by the fourth liquid level meter 225, it means that the recovery liquid in the barrel 221 is close to full load, at this time the system quickly obtains information through the control module and starts the emergency response mechanism, and the second overflow pipe 228 provided at the top of the right end of the barrel 221 immediately plays a role, orderly discharging the excess recovery liquid, effectively avoiding the overflow accident caused by excessive accumulation of recovery liquid, and ensuring the safety and stability of the entire recovery system.

[0074] Because the output end of the recovery liquid filtering device 22 is located between the fifth liquid level meter 226 and the sixth liquid level meter 227, when the water level drops to the position of the sixth liquid level meter 227, it indicates that the recovery liquid in the barrel 221 has reached a low level, at this time the control module can flexibly adjust the drainage flow of the upstream equipment such as the waste liquid sedimentation and separation device 21, to maintain the material balance and stable cooperation between each part of the system.

[0075] Conversely, when the water level rises to the position of the fifth liquid level meter 226, it indicates that the recovery liquid has accumulated to an appropriate amount for output to the subsequent processing process, and the system can accurately control the output end to stably transport the recovery liquid to the subsequent recovery liquid storage module 3 or other related equipment with stable flow and pressure, ensuring that the subsequent processing link can continue to operate efficiently, avoiding the influence of the large fluctuation of the recovery liquid output flow on the overall efficiency and recovery quality of the entire solid-liquid separation recovery system, and ensuring that each link can operate under stable working conditions, thereby improving the reliability and stability of the entire system.

[0076] The cross-sectional view of the solid waste storage barrel 222 is a V-shaped structure.

[0077] The solid impurities intercepted during the recovery liquid filtering process will slide down to the narrowest part at the bottom along the slope of the V-shaped structure under the action of gravity, avoiding the dispersed accumulation of solid waste in the barrel, so that the solid waste can be more efficiently accumulated in one place, facilitating the subsequent unified cleaning and treatment of solid waste, and reducing the difficulty and workload of cleaning.

[0078] Secondly, the pollution discharge pipe 220 is connected at the bottom of the solid waste accumulation barrel 222, when the solid waste needs to be discharged, the V-shaped structure can promote the solid waste to flow to the pollution discharge pipe 220 smoothly under the action of small pressure or external force, and the situation that the solid waste is not easy to remain or block the pollution discharge port is avoided, the smooth progress of the pollution discharge process is ensured, thereby the influence of the solid waste accumulation too much or the unsmooth discharge on the operation stability of the whole recycling system is reduced, and the system can work continuously and stably.

[0079] The hydrogen storage alloy wastewater production module 1 comprises a hydrogen storage alloy wet grinding device 11, a hydrogen storage alloy mixture buffer device 12 and a hydrogen storage alloy alkali treatment device 13.

[0080] The input end of the hydrogen storage alloy wet grinding device 11 is connected with the output end of the recycling liquid storage module 3, the output end of the hydrogen storage alloy wet grinding device 11 is connected with the input end of the hydrogen storage alloy mixture buffer device 12, the output end of the hydrogen storage alloy mixture buffer device 12 is connected with the input end of the hydrogen storage alloy alkali treatment device 13, and the output end of the hydrogen storage alloy alkali treatment device 13 is connected with the input end of the waste liquid precipitation separation device 21.

[0081] The hydrogen storage alloy wet grinding device 11 is connected with the recycling liquid storage module 3, and can fully utilize the recycling liquid for grinding operation. Recycling of the recycling liquid reduces the demand for fresh water resources, reduces production cost and improves the utilization rate of water resources.

[0082] Secondly, the hydrogen storage alloy mixture buffer device 12 plays a buffering and adjusting role. The hydrogen storage alloy mixture buffer device 12 can temporarily store the mixture after wet grinding, so as to avoid material backlog or supply interruption caused by inconsistent production rates of the front and rear processes.

[0083] Further, the hydrogen storage alloy alkali treatment device 13 performs alkali treatment on the mixture, and the wastewater after alkali treatment flows into the waste liquid precipitation separation device 21. Since the previous pretreatment step is performed, the impurity components in the wastewater are relatively single and the concentration distribution is relatively uniform, which is beneficial to efficient solid-liquid separation operation in the waste liquid precipitation separation device 21, and reduces the working burden of the subsequent recycling liquid filter device 22 and the safety filter 23.

[0084] Further, the system further comprises a pure water storage device 4, and the output end of the pure water storage device 4 is connected with the input end of the hydrogen storage alloy wet grinding device 11.

[0085] When the amount of recycling liquid in the recycling liquid storage module 3 is insufficient, pure water can be supplemented in time to ensure that the hydrogen storage alloy wet grinding device 11 can stably operate.

[0086] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative efforts, and these embodiments will all fall within the protection scope of the present application.

Claims

1. A solid-liquid separation and recovery system for hydrogen storage alloys, characterized in that, The application relates to a hydrogen storage alloy wastewater production module, a wastewater filtering module, a recovery liquid storage module and a control module. The output end of the hydrogen storage alloy wastewater production module is connected with the input end of the waste liquid precipitation separation device, the output end of the waste liquid precipitation separation device is connected with the input end of the recovery liquid filtering device, the output end of the recovery liquid filtering device is connected with the input end of the security filter, the output end of the security filter is connected with the input end of the recovery liquid storage module, and the output end of the recovery liquid storage module is connected with the input end of the hydrogen storage alloy wastewater production module.

2. The solid-liquid separation and recovery system for hydrogen storage alloy according to claim 1, characterized by The input end of the waste liquid precipitation separation device is located on the front wall of the waste liquid precipitation separation device, and the output end of the waste liquid precipitation separation device is located on the rear wall of the waste liquid precipitation separation device. The waste liquid precipitation separation device is sequentially provided with a baffle, a first filter screen and a second filter screen which are parallel to each other in the front-rear direction, and the left and right ends of the baffle, the first filter screen and the second filter screen are fixedly connected with the inner wall of the waste liquid precipitation separation device. The baffle is provided with a gap with the bottom wall of the waste liquid precipitation separation device, and the first filter screen and the second filter screen are fixedly connected with the bottom of the waste liquid precipitation separation device.

3. The solid-liquid separation and recovery system for hydrogen storage alloy according to claim 2, characterized by The front wall of the waste liquid precipitation separation device is provided with a first solid waste collection box between the baffle and the front wall, the baffle is provided with a second solid waste collection box between the baffle and the first filter screen, the first filter screen is provided with a third solid waste collection box between the first filter screen and the second filter screen, and the second filter screen is provided with a fourth solid waste collection box between the second filter screen and the rear wall of the waste liquid precipitation separation device.

4. The solid-liquid separation and recovery system for hydrogen storage alloy according to claim 3, characterized by The rear wall of the waste liquid precipitation separation device is sequentially provided with a first liquid level meter, a second liquid level meter and a third liquid level meter from top to bottom, and the first liquid level meter, the second liquid level meter and the third liquid level meter jointly identify the water level of the waste liquid precipitation separation device. The output end of the waste liquid precipitation separation device is located between the second liquid level meter and the third liquid level meter, and the waste liquid precipitation separation device is provided with a first overflow pipe above the first liquid level meter. The control module is electrically connected with the first liquid level meter, the second liquid level meter and the third liquid level meter.

5. The solid-liquid separation and recovery system for hydrogen storage alloy according to claim 1, characterized by The recovery liquid filtering device comprises a hollow barrel and a hollow solid waste storage barrel, the bottom of the barrel is connected with the top of the solid waste storage barrel, and the bottom of the solid waste storage barrel is connected with a blowdown pipe. The barrel is provided with a vertical partition plate and a horizontal filter screen, the vertical partition plate vertically divides the left and right ends of the barrel, the right end of the horizontal filter screen is vertically connected with the vertical partition plate, and the left end of the horizontal filter screen is vertically connected with the barrel wall. The input end of the recovery liquid filtering device is located at the right end of the barrel. The output end of the recovery liquid filtering device is located at the left end of the barrel.

6. The solid-liquid separation and recovery system for hydrogen storage alloy according to claim 5, characterized by The left end of the barrel is sequentially provided with a fourth liquid level meter, a fifth liquid level meter and a sixth liquid level meter from top to bottom, and the fourth liquid level meter, the fifth liquid level meter and the sixth liquid level meter jointly identify the water level of the barrel. The output end of the recovery liquid filtering device is located between the fifth liquid level meter and the sixth liquid level meter; the top part of the right end of the barrel is provided with a second overflow pipe; The control module is electrically connected with the fourth liquid level meter, the fifth liquid level meter and the sixth liquid level meter respectively.

7. The solid-liquid separation and recovery system for hydrogen storage alloy according to claim 6, characterized by The cross-sectional view of the solid waste accumulation barrel is V-shaped structure.

8. The solid-liquid separation and recovery system for hydrogen storage alloy according to claim 1, characterized by The hydrogen storage alloy wastewater production module comprises a hydrogen storage alloy wet grinding device, a hydrogen storage alloy mixture buffer device and a hydrogen storage alloy alkali treatment device. The input end of the hydrogen storage alloy wet grinding device is connected with the output end of the recovery liquid storage module, the output end of the hydrogen storage alloy wet grinding device is connected with the input end of the hydrogen storage alloy mixture buffer device, the output end of the hydrogen storage alloy mixture buffer device is connected with the input end of the hydrogen storage alloy alkali treatment device, and the output end of the hydrogen storage alloy alkali treatment device is connected with the input end of the waste liquid precipitation separation device.

9. The solid-liquid separation and recovery system for hydrogen storage alloy according to claim 8, characterized by Further comprising a pure water storage device, the output end of the pure water storage device is connected with the input end of the hydrogen storage alloy wet grinding device.

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