Efficient treatment and recycling system for organic wastewater in photovoltaic industry

Abstract

The utility model discloses an efficient treatment recycling system for organic wastewater in photovoltaic industry, which comprises an adjusting tank, a reaction tank and a sedimentation tank, the reaction tank is sequentially divided into a filter cavity, a pretreatment cavity, a micro-electrolysis cavity and a flocculation cavity from bottom to top through pore plates, an ultrasonic vibration plate is arranged in the pretreatment cavity, the micro-electrolysis cavity is filled with iron-carbon filler, and the flocculation cavity is filled with water. A plurality of flocculation balls are arranged in the flocculation cavity, a motor is mounted in the middle of the top of the reaction tank, a vertical shaft is concentrically arranged in the micro-electrolysis cavity, a vertical cylinder is concentrically arranged in the micro-electrolysis cavity through a supporting rod, filler circulation channels are reserved between the upper end and the lower end of the vertical cylinder and the corresponding pore plates respectively, and a spiral blade is arranged on the vertical shaft in the vertical cylinder; a jacket is arranged on the side wall of the reaction tank on the outer side of the water outlet, and the lower end of the jacket is obliquely arranged. In conclusion, the device disclosed by the utility model has the advantages of good denitrification effect, stability in operation, high repeated utilization rate of water and high working efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field, concretely relates to a kind of efficient treatment and reuse system of organic wastewater of photovoltaic industry. BACKGROUND

[0002] Photovoltaic industry is a new energy industry using solar photovoltaic effect to convert solar energy into electric energy, covering a complete industrial chain from raw material production to power generation system application. In the photovoltaic industry, due to the need of production, a kind of wastewater containing a large amount of nitrogen will be discharged. Discharging this wastewater into the natural environment can cause water eutrophication, affect water quality, and also cause waste of water resources and increase operating costs. In order to prevent environmental pollution and reduce waste of water resources, it is necessary to treat and reuse the organic wastewater discharged by the photovoltaic industry. Currently, people often use biological denitrification method to remove nitrogen. Nitrogen in wastewater is removed by ammonification, nitritation, nitrification and denitrification through the use of nitrification-denitrification biological denitrification method. The use of microbial metabolism removes nitrogen in wastewater. It is simple to operate and manage, cost-effective, and is the main method of wastewater denitrification.

[0003] The existing organic wastewater treatment and reuse system has low automation, high operation difficulty, high labor cost and high labor intensity. Secondly, it is difficult to maintain the wastewater treatment system in the best operating state continuously, and it is difficult to ensure that the effluent quality meets the standard. In addition, it is difficult to meet the reuse requirements after wastewater treatment, causing waste of water resources, low water reuse rate and high water resource use cost. Therefore, it is an objective need to develop an efficient treatment and reuse system for organic wastewater of photovoltaic industry with good denitrification effect, stable operation and high water reuse rate. UTILITY MODEL CONTENT

[0004] The utility model aims to provide an efficient treatment and reuse system for organic wastewater of photovoltaic industry with good denitrification effect, stable operation and high water reuse rate.

[0005] The purpose of this utility model is achieved as follows: it includes an equalization tank, a reaction tank, and a sedimentation tank. The reaction tank is divided into a filtration chamber, a pretreatment chamber, a micro-electrolysis chamber, and a flocculation chamber from bottom to top by a perforated plate. The outlet of the equalization tank is connected to the filtration chamber. An ultrasonic vibrating plate is installed in the pretreatment chamber. Iron-carbon filler is filled in the micro-electrolysis chamber. Several flocculants are installed in the flocculation chamber. A motor is installed in the middle of the top of the reaction tank. A vertical shaft is concentrically arranged in the micro-electrolysis chamber. The upper end of the vertical shaft is connected to the output shaft of the motor. A vertical cylinder is concentrically arranged in the micro-electrolysis chamber by a support rod. The upper and lower ends of the vertical cylinder are respectively provided with filler flow channels between them and the corresponding perforated plates. Spiral blades are installed on the vertical shaft in the vertical cylinder. A drain outlet is provided at the upper part of the flocculation chamber. A jacket is provided on the side wall of the reaction tank outside the drain outlet. The lower end of the jacket is inclined. The lower end of the jacket is connected to the sedimentation tank through a drain pipe.

[0006] Furthermore, there are multiple ultrasonic transducers, which are evenly distributed around the circumference of the pretreatment cavity.

[0007] Furthermore, there are multiple drainage outlets, which are evenly distributed around the circumference of the flocculation chamber, and a sludge-throwing plate is installed on the vertical axis at the same height as the drainage outlet.

[0008] Furthermore, an oxidation tank is installed on the pipeline connecting the outlet of the equalization tank to the filtration chamber.

[0009] Furthermore, a microbubble generator is installed at the bottom of the oxidation tank.

[0010] Furthermore, the perforated plate between the pretreatment chamber and the micro-electrolysis chamber is a concave cone shape.

[0011] Furthermore, the lower end of the ultrasonic transducer plate is connected to the perforated plate via a telescopic rod, and a spring is installed on the telescopic rod.

[0012] The utility model discloses a organic wastewater treatment device, including the filter cavity, the pretreatment cavity, the micro electrolysis cavity and the flocculation cavity of reaction jar, the filter cavity is provided with the hole board, the hole board is provided with the hole, the hole board is provided with the ultrasonic wave generator, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is 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vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plate, the hole board is provided with the ultrasonic wave vibration plateIn the utility model, the organic wastewater is preliminarily filtered first, then is treated by ultrasonic wave cooperated with iron-carbon micro electrolysis, the ultrasonic wave is used to preliminarily purify the organic wastewater, and simultaneously the ultrasonic wave can improve the iron-carbon micro electrolysis reaction rate and continuously update the surface of iron-carbon filler, guarantees the continuous, efficient and stable operation of the organic wastewater in the micro electrolysis cavity, then uses the divalent iron ion produced in the electrolysis process of iron-carbon as flocculant, uses the micro vortex flocculation principle to flocculate the solid suspended matter in the organic wastewater, finally carries out the sedimentation treatment to the organic wastewater, improves the water quality of final effluent, the whole treatment process has higher degree of automation, and the operation difficulty is small, can better continuously maintain the normal operation of wastewater treatment system, has better wastewater treatment effect, can recycle a large amount of water resources, improves the water reuse rate, reduces the use cost of enterprise water resources, the surface of iron-carbon filler is covered by the generated iron oxide after the system runs for a period of time, and the coagulation of the divalent iron ion produced in the electrolysis easily forms stable flocculation and gradually deposits on the surface of iron-carbon filler, causing the passivation of iron-carbon raw material and the inhibition of electrolysis reaction, the utility model is provided with a pretreatment cavity below the micro electrolysis cavity, the organic wastewater reaches the micro electrolysis cavity after ultrasonic treatment, the ultrasonic wave is used to improve the iron-carbon micro electrolysis reaction rate and continuously update the surface of iron-carbon filler, and the spiral blade is further provided, the spiral blade is driven to rotate by the motor, the spiral blade drives the iron-carbon filler in the vertical cylinder to move upwards, falls from the upper end of the vertical cylinder to the periphery, and then enters the vertical cylinder from the lower end after moving downwards, and continuously circulates, so that the iron-carbon filler is always in fluidized state, can improve the contact between the iron-carbon filler and the organic wastewater, improve the reaction efficiency, can remove the iron oxide and flocculation on the surface of the iron-carbon filler by the mutual friction between the iron-carbon fillers, effectively prevents the passivation of the iron-carbon filler, improves the treatment efficiency of the organic wastewater, and further guarantees the continuous, efficient and stable operation of the micro electrolysis cavity, improves the stability of system operation, continuously maintains the wastewater treatment system in the best operating state for a long time, and guarantees the water quality of effluent to reach the standard. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the whole structure schematic diagram of the utility model;

[0014] In the figure: 1-adjustment pool, 2-reaction tank, 3-settling tank, 4-orifice plate, 5-filtration cavity, 6-pre-treatment cavity, 7-micro electrolysis cavity, 8-flocculation cavity, 9-ultrasonic vibration plate, 10-iron-carbon filler, 11-flocculation ball, 12-motor, 13-vertical cylinder, 14-spiral blade, 15-jacket, 16-polling plate, 17-oxidation tank, 18-micro bubble generator, 19-telescopic rod, 20-spring. DETAILED DESCRIPTION

[0015] The utility model makes further explanation in combination with the drawings, but does not add any way to the utility model restricts, and any change or improvement based on the utility model, all belong to the protection scope of the utility model.

[0016] As Figure 1 The utility model discloses a kind of micro-electrolysis flocculation devices, including adjustment pool 1, reaction tank 2 and settling tank 3, reaction tank 2 is sequentially divided into filtration cavity 5, pre-treatment cavity 6, micro electrolysis cavity 7 and flocculation cavity 8 from below to above by orifice plate 4, the water outlet of adjustment pool 1 is communicated with filtration cavity 5, ultrasonic vibration plate 9 is provided in pre-treatment cavity 6, iron-carbon filler 10 is filled in micro electrolysis cavity 6, iron-carbon filler 10 is that the particle size meets standard iron, carbon, metal or non-metal catalyst, activator etc., according to certain proportion even mixing and compression molding, then sintering, can select spherical, oval or cylindrical shape etc., a plurality of flocculation balls 11 are provided in flocculation cavity 8, motor 12 is installed in the middle of the top of reaction tank 2, concentrically arranged vertical shaft in micro electrolysis cavity 7, the upper end of vertical shaft is drivingly connected with the output shaft of motor 12, vertical cylinder 13 is concentrically arranged in micro electrolysis cavity 7 by support rod, the upper end and the lower end of vertical cylinder 13 are respectively left with filler flow passage between corresponding orifice plate 4, spiral blade 14 is provided on the vertical shaft in vertical cylinder 13, the upper portion of flocculation cavity 8 is provided with drain, the lateral wall of reaction tank 2 outside drain is provided with jacket 15, the lower end of jacket 15 is obliquely arranged, the lower end of jacket 15 is communicated with settling tank 3 by drain pipe.

[0017] The utility model discloses a organic wastewater treatment device, including the reaction jar 2, the filter cavity 5, the pretreatment cavity 6, the micro electrolysis cavity 7 and the flocculation cavity 8 of reaction jar 2, the sedimentation tank 3, the ultrasonic vibration plate 9 and the hole board 4, the filter cavity 5, the pretreatment cavity 6, the micro electrolysis cavity 7 and the flocculation cavity 8 are connected to the reaction jar 2, the sedimentation tank 3 is connected to the filter cavity 5, the ultrasonic vibration plate 9 is connected to the filter cavity 5, and the hole board 4 is connected to the filter cavity 5.

[0018] In the utility model, the organic wastewater is preliminarily filtered first, then is treated by ultrasonic wave and iron-carbon micro electrolysis, the organic wastewater is preliminarily purified by ultrasonic wave, meanwhile, the ultrasonic wave can improve the iron-carbon micro electrolysis reaction rate and continuously update the surface of iron-carbon filler, guaranteeing the continuous, efficient and stable operation of the organic wastewater in the micro electrolysis cavity, then the ferrous ion produced in the electrolysis process is used as flocculant, the solid suspended matter in the organic wastewater is flocculated by micro vortex flocculation principle, finally, the organic wastewater is treated by precipitation, improving the water quality of the final effluent, the whole treatment process has high automation degree, small operation difficulty, can continuously maintain the normal operation of the wastewater treatment system, has good wastewater treatment effect, can recycle a large amount of water resources, improves the water recycling rate, reduces the use cost of enterprise water resources, the surface of iron-carbon filler 10 is covered by the generated iron oxide, meanwhile, the coagulation of the ferrous ion produced in the electrolysis process can form stable flocculation and gradually deposit on the surface of iron-carbon filler 10, causing the passivation of iron-carbon raw material 10 and inactivation, the electrolysis reaction is blocked, the utility model is provided with pretreatment cavity 6 below the micro electrolysis cavity, the organic wastewater reaches the micro electrolysis cavity 7 after ultrasonic treatment, the ultrasonic wave is used to improve the iron-carbon micro electrolysis reaction rate and continuously update the surface of iron-carbon filler 10, the spiral blade 14 is further provided, the motor 12 drives the spiral blade 14 to rotate, the spiral blade 14 drives the iron-carbon filler 10 in the vertical cylinder 13 to move upwards, falls from the upper end of the vertical cylinder 13 to the periphery, after moving downwards, enters the vertical cylinder 13 from the lower end, continuously circulates, so that the iron-carbon filler 10 is always in fluidized state, can improve the contact between the iron-carbon filler 10 and the organic wastewater, improve the reaction efficiency, can remove the iron oxide and flocculation on the surface of the iron-carbon filler 10 by mutual friction between the iron-carbon fillers 10, effectively prevent the passivation of the iron-carbon filler 10 and inactivation, improve the treatment efficiency of the organic wastewater, further guarantee the continuous, efficient and stable operation of the micro electrolysis cavity 7, improve the stability of the system operation, continuously maintain the wastewater treatment system in the best operation state for a long time, guarantee the effluent water quality to reach the standard.

[0019] In order to improve the preliminary purification effect of ultrasonic wave on the organic wastewater, the number of ultrasonic vibration plates 9 is multiple, and the multiple ultrasonic vibration plates 9 are circumferentially distributed in the pretreatment cavity 6.

[0020] The number of the drain outlets is multiple, the multiple drain outlets are uniformly distributed along the circumference of the flocculation cavity 8, and the dirt throwing plate 16 is arranged on the vertical shaft at the same height with the drain outlet. The dirt throwing plate 16 is arranged on the vertical shaft and rotates together, can quickly throw the formed alunite, and avoids that the alunite is gathered in the flocculation cavity 8.

[0021] The pipeline, in which the outlet of the adjusting tank 1 communicates with the filtering cavity 5, is provided with the oxidation tank 17. The oxidation tank 17 is used for oxidation of the organic wastewater. In the implementation, a certain oxidant can be added in the oxidation tank 17. The oxidant can be selected from ozone or hydrogen peroxide and the like, so as to improve the oxidation capacity of the organic wastewater. The oxidation of the organic wastewater can enhance the cavitation effect of the ultrasonic wave, further promotes the generation of the oxidizing substances such as hydroxyl radical and superoxide radical, and improves the oxidation intensity of the ultrasonic wave in degrading the pollutants.

[0022] The bottom of the oxidation tank 17 is provided with the micro-bubble generator 18. The micro-bubble generator 18 is an existing device and is arranged at the bottom of the oxidation tank 17. In use, the oxidation gas is introduced into the micro-bubble generator 18, so as to form the uniform micro-bubbles with small volume in the organic wastewater, and promote the oxidation efficiency of the organic wastewater.

[0023] The hole plate 4 between the pretreatment cavity 6 and the micro-electrolysis cavity 7 is in a conical shape with the middle part being concave downward. In the utility model, the running route of the iron-carbon filler 10 is as follows. The iron-carbon filler 10 is driven by the spiral blade 14 to move upward in the vertical cylinder 13, falls from the upper end of the vertical cylinder 13 to the surrounding, moves downward in the annular space between the vertical cylinder 13 and the reaction tank 2, and finally enters the vertical cylinder 13 from the lower end of the vertical cylinder 13, so as to realize the continuous circulation of the iron-carbon filler 10. In the actual use process, it is found that when the iron-carbon filler 10 is located at the bottom of the annular space, the iron-carbon filler 10 may be blocked due to the friction, so that the iron-carbon filler 10 cannot enter the vertical cylinder 13 from the lower end of the vertical cylinder 13. In order to solve this problem, the hole plate 4 is arranged in a conical shape, so that the iron-carbon filler 10 can smoothly enter the inside of the vertical cylinder 13 under the action of its own gravity, and the continuous circulation of the iron-carbon filler 10 is ensured.

[0024] The lower end of the ultrasonic vibration plate 9 is connected with the hole plate 4 through the telescopic rod 19, and the telescopic rod 19 is provided with the spring 20. The core component of the ultrasonic vibration plate 9 is the vibrator, which can convert the electric energy into the mechanical vibration energy, so that the molecules in the organic wastewater are vibrated at high speed. It can be seen that the ultrasonic vibration plate 9 is also in the vibration state. Through the arrangement of the telescopic rod 19 and the spring 20, the vibration can be absorbed and buffered, so that the vibration is not transmitted to the reaction tank 2, and the long-term stable operation of the reaction tank 2 is ensured.

[0025] Ultrasound is a kind of high frequency mechanical wave, the ultrasonic power is 0-8KW, the ultrasonic frequency is 20-80 kHz, the wavelength is short, the energy is concentrated, the strong energy of the load can cause liquid turbulence, which can be used for the intensification of various liquid-liquid, solid-liquid chemical reactions. For solid-liquid reaction system, the strong microjet and shock wave generated by the cavitation effect of ultrasound in the solution can scour the solid surface and release the reactive sites on the surface of the solid, at the same time, the liquid turbulence caused by ultrasound intensifies the degree of solid-liquid mixing, thereby improving the chemical reaction rate. Ultrasound causes cavitation effect in water, generating 4000K and 100MPa of instantaneous local high temperature and high pressure environment, and generating microjet and shock wave with strong impact force at a speed of about 110m / s. When water molecules reach supercritical state at the hot spot, they are decomposed into hydroxyl radicals, superoxide radicals and other oxidizing substances, so that the organic pollutants in wastewater undergo bond breaking, water phase combustion, high temperature decomposition, supercritical water oxidation, free radical oxidation and other reactions at the hot spot, and superimpose the particle vibration and secondary derivative wave in the sound field, so as to be converted into small molecular organic matter, even into carbon dioxide and water. The iron-carbon micro-electrolysis technology takes advantage of the difference between the oxidation and reduction potentials of iron and carbon to form countless micro primary cells in the reactor, which reduces and degrades the pollutants in organic wastewater.

[0026] On the one hand, ultrasound can preliminarily purify organic wastewater, convert a small part of organic pollutants in wastewater into carbon dioxide, water and the like, and convert most of them into small molecular organic matter, which is conducive to the adsorption and decomposition of organic wastewater by the iron-carbon filler 10. On the other hand, the turbulence caused by ultrasound in water can improve the solid-liquid reaction rate of the iron-carbon filler 10 and wastewater, and the strong microjet and shock wave generated by cavitation effect can scour the iron oxide and flocculation formed on the surface of the iron-carbon filler 10 in long-term operation, release the reactive sites on the surface of the iron-carbon filler 10, and avoid the decrease of reaction rate.

[0027] The iron-carbon micro-electrolysis reaction consumes a large amount of H in water and produces a large amount of [OH], thereby increasing the pH value and creating conditions for subsequent flocculation reaction. In addition, the divalent iron ions produced by hydrolysis during the iron-carbon electrolysis process are good flocculants with high adsorption-flocculation activity. After the water flow enters the flocculation cavity 8 from the micro-electrolysis cavity 7, it repeatedly passes through the flocculation holes of the flocculation ball 11. Under the action of the flow velocity, flow direction change and friction resistance of the inner and outer walls, a large number of small eddies are formed. The flocculation ball 11 floats upward or rotates under the impact of the water flow. Since the specific gravity of the flocculation ball 11 is greater than that of water, it will not float out of the water surface, which is conducive to avoiding the phenomenon of mud accumulation and blockage.

Claims

1. A high-efficiency treatment and recycling system for organic wastewater in the photovoltaic industry, comprising a conditioning tank (1), a reaction tank (2) and a sedimentation tank (3), characterized in that: The reaction tank (2) is divided into filter cavity (5), pretreatment cavity (6), micro electrolysis cavity (7) and flocculation cavity (8) from bottom to top by orifice plate (4), the outlet of the adjusting tank (1) is communicated with the filter cavity (5), the ultrasonic vibration plate (9) is arranged in the pretreatment cavity (6), the iron-carbon filler (10) is filled in the micro electrolysis cavity (7), the flocculation cavity (8) is provided with a plurality of flocculation balls (11), the motor (12) is installed in the middle of the top of the reaction tank (2), the vertical shaft is arranged concentrically in the micro electrolysis cavity (7), the upper end of the vertical shaft is in transmission connection with the output shaft of the motor (12), the vertical cylinder (13) is arranged concentrically in the micro electrolysis cavity (7) through the support rod, the upper end and the lower end of the vertical cylinder (13) are respectively communicated with the corresponding orifice plate (4), the spiral blade (14) is arranged on the vertical shaft in the vertical cylinder (13), the upper part of the flocculation cavity (8) is provided with a drain outlet, the jacket (15) is arranged on the side wall of the reaction tank (2) outside the drain outlet, the lower end of the jacket (15) is arranged obliquely, the lower end of the jacket (15) is communicated with the sedimentation tank (3) through the drain pipe.

2. The efficient treatment and reuse system of organic wastewater in photovoltaic industry according to claim 1, characterized in that: The number of the ultrasonic vibration plate (9) is multiple, and the multiple ultrasonic vibration plates (9) are distributed uniformly in the circumference of the pretreatment cavity (6).

3. The efficient treatment and reuse system of organic wastewater in photovoltaic industry according to claim 1, characterized in that: The number of the drain outlet is multiple, and the multiple drain outlets are distributed uniformly along the circumference of the flocculation cavity (8), and the dirt throwing plate (16) is arranged on the vertical shaft at the same height with the drain outlet.

4. The efficient treatment and reuse system of organic wastewater in photovoltaic industry according to claim 1, characterized in that: The pipeline, which is communicated with the filter cavity (5) and the outlet of the adjusting tank (1), is provided with the oxidation tank (17).

5. The efficient treatment and reuse system of organic wastewater in photovoltaic industry according to claim 4, characterized in that: The bottom of the oxidation tank (17) is provided with the micro bubble generator (18).

6. The efficient treatment and reuse system of organic wastewater in photovoltaic industry according to claim 1, characterized in that: The orifice plate (4) between the pretreatment cavity (6) and the micro electrolysis cavity (7) is conical with the middle part being concave downward.

7. The efficient treatment and reuse system of organic wastewater in photovoltaic industry according to claim 1, characterized in that: The lower end of the ultrasonic vibration plate (9) is connected with the orifice plate (4) through the telescopic rod (19), and the spring (20) is arranged on the telescopic rod (19).

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