Efficient silicon removal integrated device

Abstract

The utility model relates to an efficient silicon removal integrated device which comprises a reaction tank unit, a solid-liquid separation unit, a silicon carbide microfiltration unit and a water producing tank, the reaction tank unit comprises a first reaction tank, a first agent adding ring and a first stirrer are arranged in the first reaction tank, and the solid-liquid separation unit comprises an aeration tank and an effluent collecting tank. The bottom of the aeration tank is communicated with the first reaction tank, the top of the aeration tank is communicated with the effluent collecting tank, a pressurized dissolved air tank and a microbubble air releaser are arranged in the aeration tank, an effluent collector is arranged in the effluent collecting tank, and the silicon carbide microfiltration unit comprises a silicon carbide microfiltration membrane, a steam-water mixing pressure column and a water inlet pump. The silicon carbide micro-filtration membrane is connected with the effluent collecting tank through the water inlet pump, the gas-water mixing pressure column is used for cleaning the surface of the silicon carbide micro-filtration membrane, and the water producing tank is connected with the silicon carbide micro-filtration membrane and is suitable for receiving filtrate of a micro-filtration unit, so that the solid-liquid separation efficiency and the stability of the system are improved, and the effluent of the device is stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of silicon-containing wastewater treatment, and particularly relates to a high-efficiency silicon removal integrated device. BACKGROUND

[0002] At present, common treatment methods for silicon-containing wastewater include coagulation sedimentation, tubular membrane filtration and electric flocculation. In actual application, each method has respective shortcomings. Since the flocculation formed after adding a silicon removal agent to the silicon-containing wastewater is fine and light in quality, it is difficult to naturally settle or takes a long time to naturally settle, and the effluent quality is unstable, so it is generally necessary to add lime or PAM to assist in sedimentation, which undoubtedly increases the amount of reagent addition and the reagent addition equipment, and increases the economic investment. At the same time, a large amount of reagent affects the normal operation of the subsequent process or causes secondary pollution. Alternatively, mechanical filtration or membrane filtration devices are used for solid-liquid separation after the reagent is added and reacts, and the common problems of this type of method are that the filter material is scaled and the silicon scale is difficult to clean, or the membrane filtration is seriously blocked or has a large energy consumption. CONTENT OF THE UTILITY MODEL

[0003] To solve the problem of unstable effluent of the traditional device, the utility model provides a device which comprises:

[0004] a reaction pool unit comprising a first reaction pool, wherein a first reagent addition ring and a first stirrer are arranged in the first reaction pool;

[0005] a solid-liquid separation unit comprising an aeration tank and an effluent collection tank, wherein the bottom of the aeration tank is communicated with the first reaction pool, the top of the aeration tank is communicated with the effluent collection tank, a pressurized air dissolving tank and a micro-bubble air release device are arranged in the aeration tank, and an effluent collector is arranged in the effluent collection tank;

[0006] a silicon carbide microfiltration unit comprising a silicon carbide microfiltration membrane, a gas-water mixed pressure column and a water inlet pump, wherein the silicon carbide microfiltration membrane is connected with the effluent collection tank through the water inlet pump, and the gas-water mixed pressure column is used for cleaning the surface of the silicon carbide microfiltration membrane;

[0007] an effluent tank connected with the silicon carbide microfiltration membrane and suitable for receiving the filtrate of the microfiltration unit.

[0008] In a possible implementation manner, the reaction pool unit further comprises a second reaction pool.

[0009] the side wall bottom of the first reaction pool is communicated with the side wall bottom of the first reaction, and the inside of the first reaction pool is provided with a second reagent addition ring and a second stirrer.

[0010] In a possible implementation manner, the device further comprises an intermediate water tank.

[0011] The intermediate water pool is arranged between the solid-liquid separation unit and the silicon carbide microfiltration unit, and the intermediate water pool is connected with the intermediate water pool through the water outlet collector and connected with the silicon carbide microfiltration membrane through the water inlet pump.

[0012] In a possible implementation, the micro-bubble air release device is connected with the pressurized dissolved air tank, aerates the aeration tank, and the micro-bubble air release device is arranged at the bottom of the aeration tank.

[0013] In a possible implementation, the solid-liquid separation unit further comprises a scum pool.

[0014] The aeration tank is further provided with a scum collector arranged at the top of the aeration tank, and the scum collector is connected with the scum pool to collect the scum in the aeration tank into the scum pool.

[0015] In a possible implementation, the bottom of the water outlet collection pool is provided with a sludge discharge pump.

[0016] The high-efficiency silicon removal integrated device has the advantages of improving the solid-liquid separation efficiency and the stability of the system, stabilizing the water outlet of the device, improving the reaction efficiency by adding the reagent in two steps through the two-stage reaction tank, reducing the waste of the reagent, replacing the traditional sedimentation with the micro-bubble air flotation separation, shortening the separation time by more than 50%, prolonging the service life of the silicon carbide membrane by cooperating with the high-pressure flushing, and avoiding the connection problems of multiple devices by the integrated design. Specifically, the first reaction tank and the second reaction tank are connected, the reagent and the silicon-containing wastewater are added together, and the mixer is used for stirring and mixing, so that the wastewater and the reagent are fully reacted, the liquid and the solid are separated in the solid-liquid separation unit, the solid is discharged, and the liquid is subsequently filtered and stored.

[0017] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and serve to explain the principles of the present application.

[0019] Figure 1 A schematic diagram of the main structure of the high-efficiency silicon removal integrated device is shown. DETAILED DESCRIPTION

[0020] Various exemplary embodiments, features, and aspects of the present application will be described herein below with reference to the accompanying drawings. The same reference numbers in different drawings indicate functionally similar or identical elements. Although various aspects of embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically noted.

[0021] It should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate relative or positional relationships based on the orientation or position shown in the drawings, and are used only for convenience of description or simplification of description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0022] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0023] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0024] In addition, in order to better illustrate the present application, a large number of specific details are given in the specific embodiments below. Those skilled in the art should understand that the present application can also be implemented without some specific details. In some examples, methods, means, elements and circuits well known to those skilled in the art are not described in detail, in order to highlight the main idea of the present application.

[0025] Figure 1 A schematic diagram showing the main structure according to an embodiment of the present application is shown. As Figure 1As shown, the high-efficiency silicon removal integrated device of the embodiment of the present application comprises a reaction tank unit, a solid-liquid separation unit, a silicon carbide microfiltration unit, and a water production tank 18. The reaction tank unit comprises a first reaction tank 1, and the first reaction tank 1 is provided with a first medicament adding ring 3 and a first stirrer 3. The solid-liquid separation unit comprises an aeration tank 8 and a water outlet collection tank 14. The bottom of the aeration tank 8 is communicated with the first reaction tank 1, the top of the aeration tank 8 is communicated with the water outlet collection tank 14, and the aeration tank 8 is provided with a pressurized dissolved gas tank 10 and a micro-bubble air release device 9. The water outlet collection tank 14 is provided with a water outlet collector 13. The silicon carbide microfiltration unit comprises a silicon carbide microfiltration membrane 17, a gas-water mixed pressure column 19, and a water inlet pump 16. The silicon carbide microfiltration membrane 17 is connected with the water outlet collection tank 14 through the water inlet pump 16. The gas-water mixed pressure column 19 is used to clean the surface of the silicon carbide microfiltration membrane 17. The water production tank 18 is connected with the silicon carbide microfiltration membrane 17 and is suitable for receiving the filtrate of the microfiltration unit.

[0026] In this specific embodiment, the solid-liquid separation efficiency and the stability of the system are improved, the water outlet of the device is stable, the reaction efficiency is improved by adding medicaments in two stages through two-stage reaction tanks, the waste of medicaments is reduced, the micro-bubble air flotation separation replaces the traditional sedimentation, the separation time is shortened by more than 50%, the silicon carbide membrane 17 is corrosion-resistant and anti-fouling, the service life of the membrane 17 is prolonged by cooperating with high-pressure washing, and the integrated design avoids the connection problems of multiple devices. Specifically, the first reaction tank 1 and the second reaction tank 4 are communicated, medicaments and silicon-containing wastewater are added together, and a stirrer is used for stirring and mixing, so that the wastewater and the medicaments are fully reacted, the separation of liquid and solid is completed after entering the solid-liquid separation unit, the solid is discharged, and the liquid is subsequently filtered and stored.

[0027] In one specific embodiment, the reaction tank unit further comprises a second reaction tank 4, the sidewall bottom of the first reaction tank 1 is communicated with the sidewall bottom of the first reaction, and the inside of the first reaction tank 1 is provided with a second medicament adding ring 5 and a second stirrer 6. Specifically, the second reaction tank 4 is added to be connected in series with the first reaction tank 1, the second medicament adding ring 5 and the second stirrer 6 are arranged inside, medicaments and silicon-containing wastewater can be added together with the first reaction tank 1, NaAlO2 and PAM are added in stages, the flocculation process is optimized, the medicaments are prevented from interfering with each other, two-stage stirring ensures sufficient reaction, and the flocculation structure is dense.

[0028] In one specific embodiment, it further comprises an intermediate water tank 15, which is arranged between the solid-liquid separation unit and the silicon carbide microfiltration unit, and the intermediate water tank 15 is connected with the intermediate water tank 15 through the water outlet collector 13 and connected with the silicon carbide microfiltration membrane 17 through the water inlet pump 16. The intermediate water tank 15 connects the solid-liquid separation unit and the microfiltration unit, buffers the water flow and stabilizes the pressure, can avoid the fluctuation of the water inlet flow of the microfiltration unit, protects the silicon carbide membrane 17, and the intermediate water tank 15 serves as a transition to reduce the influence of system start-stop on the performance of the membrane 17.

[0029] In one embodiment, the micro-bubble air release device 9 is connected to the pressurized gas tank 10 to aerate the aeration tank 8, and the micro-bubble air release device 9 is arranged at the bottom of the aeration tank 8. The bottom aeration ensures uniform distribution of micro-bubbles, improves the efficiency of scum separation, and has strong adsorption capacity, reducing the dosage of reagents by 30%.

[0030] In one embodiment, the solid-liquid separation unit further comprises a scum tank 12, and the aeration tank 8 is further provided with a scum collector 11 arranged at the top of the aeration tank 8, and the scum collector 11 is connected to the scum tank 12 to collect the scum in the aeration tank 8 into the scum tank 12. The solid-liquid separation unit is additionally provided with the scum tank 12, and the scum is continuously removed by the scum collector 11. The scum is concentrated and treated to avoid secondary pollution, and the automatic scum removal reduces manual intervention and improves system stability.

[0031] In one embodiment, a sludge pump is arranged at the bottom of the effluent collection tank 14 to prevent sludge deposition from blocking the pipeline, ensure stable effluent quality, and reduce equipment maintenance frequency and prolong service life.

[0032] According to the above embodiment, the silicon-containing wastewater is sequentially sent to the first reaction tank 1 and the second reaction tank 4, and reagents are added through the reagent addition ring in the first reaction tank 1 and the second reaction tank 4. The wastewater and reagents are mixed and stirred by the stirrers in the first reaction tank 1 and the second reaction tank 4 to allow the wastewater to fully react with the reagents. The reaction liquid enters the aeration tank 8. The reaction liquid is aerated in the aeration tank 8 by the pressurized gas tank 10 and the micro-bubble release device. The aerated reaction liquid enters the effluent collection tank 14 for solid-liquid separation. A large number of fine flocs in the reaction liquid float to the liquid surface in the separation zone and enter the scum tank 12 through the scum collector 11. The larger particles of solid in the reaction liquid naturally settle at the bottom of the separation zone and are discharged through the sludge pump. The reaction liquid after separation of the solid is collected by the effluent collector 13 and enters the intermediate tank 15. The effluent from the intermediate tank 15 is sent to the silicon carbide micro-filtration device by the water inlet pump 16. The silicon carbide micro-filtration membrane 17 is pressure-filtered. The filtrate enters the water production tank 18. The surface of the silicon carbide micro-filtration membrane 17 is washed every 10-15 minutes by the steam-water mixed pressure column 19 to prevent the formation of silicon structure and blockage of the silicon carbide membrane 17.

[0033] Specifically, the method comprises the following steps:

[0034] Step 1: The silicon-containing wastewater is pumped into the first reaction tank 1, NaAlO2 is added to the tank through the first reagent addition ring 3 arranged in the tank, and then the mixture is rapidly stirred by the first stirrer 3 and flows into the second reaction tank 4.

[0035] Step 2, after the waste water enters the second reaction tank 4, the PAM agent is added into the tank through the second agent adding ring 5, and the second stirrer 6 is used to stir slowly and uniformly, so that the silicon in the waste water reacts with NaAlO2 fully, and the PAM helps to generate flocculation. The solid-liquid mixture in the second reaction tank 4 flows into the aeration tank 8.

[0036] Step 3, after the mixture enters the aeration tank 8, the pressure gas solution in the pressurized gas tank 10 is injected into the mixture through the micro-bubble air release device 9, and the micro-bubbles adhered to the solid material float to the water surface, and the suspended matter in the water is sent to the water surface. The continuous operation of the scum collector 11 collects and removes the suspended matter, while the larger particle flocculation naturally settles to the bottom and is periodically discharged.

[0037] Step 4, the effluent collection area tank collects the effluent through the effluent collector 13 and enters the intermediate water.

[0038] Step 5, the effluent from the intermediate water tank 15 is pumped to the silicon carbide microfiltration membrane 17 through the microfiltration inlet pump 16 for filtration, and the filtered water enters the product water tank 18.

[0039] Step 6, the silicon carbide microfiltration membrane 17 is equipped with a steam-water mixed pressure column 19, which performs a 5s-15s rapid pressure flushing of the silicon carbide microfiltration membrane 17 every 10-15min to prevent surface scaling and blockage. The flushing water is discharged to the ditch.

[0040] The above has described the embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical applications, or improvements to the technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A high-efficiency silicon removal integrated device, characterized in that, The application relates to a water treatment device. The device comprises a reaction cell unit, a solid-liquid separation unit, a silicon carbide microfiltration unit, a water production cell and an intermediate water cell. The reaction cell unit comprises a first reaction cell, a second reaction cell, a first medicament adding ring and a first stirrer. The solid-liquid separation unit comprises an aeration tank and a water outlet collection tank. The aeration tank is connected with the first reaction cell at the bottom and connected with the water outlet collection tank at the top.

2. The high-efficiency silicon removal integrated device according to claim 1, characterized in that, The aeration tank is provided with a pressurized air dissolving tank and a micro-bubble air release device. The water outlet collection tank is provided with a water outlet collector.

3. The high-efficiency silicon removal integrated device according to claim 2, characterized in that, The silicon carbide microfiltration unit comprises a silicon carbide microfiltration membrane, a steam-water mixed pressure column and a water inlet pump. The silicon carbide microfiltration membrane is connected with the water outlet collection tank through the water inlet pump. The steam-water mixed pressure column is used for cleaning the surface of the silicon carbide microfiltration membrane.

4. The high-efficiency silicon removal integrated device according to any one of claims 1-3, characterized in that, The water production cell is connected with the silicon carbide microfiltration membrane and used for receiving the filtrate of the microfiltration unit.

5. The high-efficiency silicon removal integrated device according to claim 4, characterized in that, The reaction cell unit further comprises a second reaction cell. The sidewall bottom of the first reaction cell is connected with the sidewall bottom of the first reaction cell.

6. The high-efficiency silicon removal integrated device according to claim 5, wherein The first reaction cell is provided with a second medicament adding ring and a second stirrer. The intermediate water cell is arranged between the solid-liquid separation unit and the silicon carbide microfiltration unit. The intermediate water cell is connected with the water outlet collector and connected with the silicon carbide microfiltration membrane through the water inlet pump. The micro-bubble air release device is connected with the pressurized air dissolving tank and used for aerating the aeration tank. The micro-bubble air release device is arranged at the bottom of the aeration tank. The solid-liquid separation unit further comprises a dross tank. The aeration tank is further provided with a dross collector. The dross collector is arranged at the top of the aeration tank and connected with the dross tank. The bottom of the water outlet collection tank is provided with a sludge discharge pump.

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