Anaerobic treatment device for aquaculture wastewater

Abstract

The utility model belongs to the technical field of breeding wastewater, and particularly relates to a breeding wastewater anaerobic treatment device which comprises a tank body, the tank body is provided with a stirring device, the stirring device comprises a motor, a stirring shaft, an upper-layer paddle, a middle-layer paddle and a lower-layer paddle, the upper-layer paddle, the middle-layer paddle and the lower-layer paddle are arranged on the stirring shaft at intervals, and an output shaft of the motor is connected with the stirring shaft. The stirring shaft is arranged in the tank body along the vertical direction, the included angle between the blade inclined plane of the upper-layer paddle and the horizontal plane is 20-40 degrees, the included angle between the blade inclined plane of the middle-layer paddle and the horizontal plane is 90 degrees, and the included angle between the blade inclined plane of the lower-layer paddle and the horizontal plane is 20-40 degrees. The utility model has the beneficial effects that a plurality of hydraulic mixing and stirring areas are formed in the tank body through the plurality of layers of paddles which are designed in a combined manner, so that the purpose of fully mixing wastewater is achieved on the basis of reducing the stirring power as much as possible, the full contact reaction of pollutants and microorganisms is ensured, the cost is low, and the treatment effect is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of anaerobic treatment of aquaculture wastewater, and particularly relates to an anaerobic treatment device for aquaculture wastewater. Background Art

[0002] Due to the rapid development of water treatment technology in recent years, anaerobic treatment process has been widely used in the treatment of aquaculture wastewater due to its good treatment effect, low investment cost and high economic benefit. The completely mixed anaerobic reaction process is one of the main anaerobic processes for aquaculture wastewater treatment in China. For aquaculture wastewater with a small treatment volume, the use of a continuous stirred reactor system can usually achieve better results. The continuous stirred reactor system can also be called: a completely mixed anaerobic reactor (Continuous Stirred Tank Reactor, referred to as CSTR), which is an anaerobic treatment technology that keeps the fermentation raw materials and microorganisms in a completely mixed state. In the anaerobic treatment process of the wastewater, the full mixing and stirring of the anaerobic sludge particles and the wastewater in the reactor is considered to be one of the important process conditions for improving the efficiency of anaerobic treatment. Commonly used mixing and stirring methods in the reactor include mechanical stirring, biogas stirring and water circulation stirring. Among them, mechanical stirring has the advantages of low investment cost, simple process design, simple maintenance and repair, wide application range and large mixing range, so it has been more widely used in the anaerobic water treatment process of aquaculture wastewater. However, in the existing CSTR devices, there is a lack of mechanical stirring devices designed for the characteristics of aquaculture wastewater, such as solid-liquid mixing, high concentration of organic suspended matter, and high viscosity. How to design a suitable CSTR mixing and stirring device according to the characteristics of aquaculture wastewater and obtain the optimal solution in terms of cost, practicality and treatment effect has become a key issue that technicians in this field need to solve urgently. Utility Model Content

[0003] The utility model aims to provide an anaerobic treatment device for aquaculture wastewater with low cost and good treatment effect.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An anaerobic treatment device for aquaculture wastewater comprises a tank body, wherein the tank body is provided with a stirring device, wherein the stirring device comprises a motor, a stirring shaft, and an upper blade, a middle blade and a lower blade arranged at intervals on the stirring shaft, wherein the output shaft of the motor is connected to the stirring shaft, and the stirring shaft is arranged in the tank body along the vertical direction, the acute angle between the blade slope of the upper blade and the horizontal plane is 20° to 40°, the angle between the blade slope of the middle blade and the horizontal plane is 90°, the acute angle between the blade slope of the lower blade and the horizontal plane is 20° to 40°, and the inclination direction of the blade slope of the upper blade relative to the stirring shaft is opposite to the inclination direction of the blade slope of the lower blade relative to the stirring shaft.

[0006] The utility model has at least the following beneficial effects: through the combined design of the multi-layer blades, a plurality of hydraulic mixing and stirring areas are formed in the tank body, and the purpose of fully mixing the wastewater is achieved on the basis of reducing the stirring power as much as possible, ensuring the full contact reaction between the pollutants and the microorganisms, with low cost and good treatment effect.

[0007] In one embodiment, the acute angle between the inclined surface of the blade of the upper layer and the horizontal plane is 30°, and the acute angle between the inclined surface of the blade of the lower layer and the horizontal plane is 30°.

[0008] In one embodiment, a gas exhaust valve is provided on the top of the tank.

[0009] In one embodiment, it also includes a water inlet pipe and a water outlet pipe, the water outlet end of the water inlet pipe is connected to the water inlet at the upper part of the tank body, the water inlet end of the water outlet pipe is connected to the water outlet at the lower part of the tank body, the water inlet pipe is provided with a water inlet pump and a water inlet valve, and the water outlet pipe is provided with a water outlet valve.

[0010] In one of the embodiments, a drain pipe is further included, the drain pipe is provided with a drain valve, the bottom of the tank body is provided with a drain port, and the water inlet end of the drain pipe is connected to the drain port.

[0011] In one embodiment, a flushing pipe is further included, on which a flushing valve is provided, the water inlet end of the flushing pipe is connected to the water inlet pipe, the water outlet end of the flushing pipe is connected to the drain port, and the water inlet end of the flushing pipe is located between the water inlet pump and the water inlet valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 This is a schematic diagram of the structure of the anaerobic treatment device for aquaculture wastewater according to an embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram of the hydraulic mixing and stirring area and approximate water flow direction of the anaerobic treatment device for aquaculture wastewater in an embodiment of the utility model.

[0015] Among them, the reference numerals in the figure are:

[0016] 1. Tank body; 2. Motor; 3. Agitator shaft; 31. Upper paddle blades; 32. Middle paddle blades; 33. Lower paddle blades; 4. Exhaust valve; 5. Water inlet pipe; 51. Water inlet pump; 6. Water outlet pipe; 7. Drain pipe; 8. Flushing pipe; 91. Water inlet valve; 92. Water outlet valve; 93. Drain valve; 94. Flushing valve. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-2As shown, the aquaculture wastewater anaerobic treatment device provided by the utility model comprises a cylindrical tank body 1, the tank body 1 is provided with a stirring device, the stirring device comprises a motor 2, a stirring shaft 3, and three layers of blades (upper blade 31, middle blade 32, lower blade 33) arranged at intervals on the stirring shaft 3, the motor 2 is installed outside the tank body 1, the output shaft of the motor 2 is connected to the stirring shaft 3, the stirring shaft 3 is arranged in the tank body 1 along the vertical direction, the upper blade 31 is located at a certain position in the upper part of the tank body 1, and the upper blade 33 is arranged at a certain position in the upper part of the tank body 1. The acute angle between the inclined surface of the blade of the upper paddle 31 and the horizontal plane is 20° to 40°; the middle paddle 32 is located in the middle of the tank body 1, and the angle between the inclined surface of the blade of the middle paddle 32 and the horizontal plane is 90°; the lower paddle 33 is located at a certain position in the lower part of the tank body 1, and the acute angle between the inclined surface of the blade of the lower paddle 33 and the horizontal plane is 20° to 40°, and the inclination direction of the inclined surface of the blade of the upper paddle 31 relative to the stirring shaft 3 is opposite to the inclination direction of the inclined surface of the blade of the lower paddle 33 relative to the stirring shaft 3.

[0022] The inclination direction of the blade slope of the upper blade 31 relative to the stirring shaft 3 is opposite to the inclination direction of the blade slope of the lower blade 33 relative to the stirring shaft 3, which means that: the upper end of the root chord of the upper blade 31 is located on the left side of the central axis of the stirring shaft 3, and the lower end of the root chord of the upper blade 31 is located on the right side of the central axis of the stirring shaft 3, the upper end of the root chord of the lower blade 33 is located on the right side of the central axis of the stirring shaft 3, and the lower end of the root chord of the lower blade 33 is located on the left side of the central axis of the stirring shaft 3.

[0023] When the output shaft of the motor 2 rotates, it drives the stirring shaft 3 and the multi-layered blades thereon to interact with the wastewater, and converts the kinetic energy of the blades into the kinetic energy of the wastewater.

[0024] Figure 2It shows multiple hydraulic mixing and stirring areas and the approximate water flow direction generated in the tank body 1 during operation. Pig farm wastewater has a high concentration of organic suspended matter and high viscosity, and requires greater hydraulic stirring to fully mix the wastewater and prevent excessive sedimentation of suspended matter. The utility model uses a combination of multi-layer blades, wherein the acute angle between the blade slope of the upper blade 31 and the horizontal plane is 20° to 40°, the angle between the blade slope of the middle blade 32 and the horizontal plane is 90°, the acute angle between the blade slope of the lower blade 33 and the horizontal plane is 20° to 40°, and the inclination direction of the blade slope of the upper blade 31 relative to the stirring shaft 3 is opposite to the inclination direction of the blade slope of the lower blade 33 relative to the stirring shaft 3, so that the wastewater in the upper part of the tank body 1 is stirred in the upper layer. The wastewater in the middle of the tank body 1 flows obliquely upward away from the stirring shaft 3 under the push of the middle blades 32, and the wastewater in the lower part of the tank body 1 flows obliquely downward away from the stirring shaft 3 under the push of the lower blades 33. An axial flow from the upper and lower ends to the center is formed between the upper blades 31 and the lower blades 33 of the stirring shaft 3, thereby forming multiple hydraulic mixing and stirring areas in the tank body 1 to ensure sufficient contact reaction between pollutants and microorganisms.

[0025] The beneficial effects of the utility model are as follows: through the combined design of the multi-layer blades, a plurality of hydraulic mixing and stirring areas are formed in the tank body, and the purpose of fully mixing the wastewater is achieved on the basis of reducing the stirring power as much as possible, ensuring the full contact reaction between the pollutants and the microorganisms, with low cost and good treatment effect.

[0026] In one embodiment, the acute angle between the inclined surface of the upper blade 31 and the horizontal plane is 30°; the angle between the inclined surface of the middle blade 32 and the horizontal plane is 90°; the acute angle between the inclined surface of the lower blade 33 and the horizontal plane is 30°.

[0027] In one embodiment, an exhaust valve 4 is provided on the top of the tank body 1, and the exhaust valve 4 can be a mature diaphragm type automatic exhaust valve. The anaerobic gas generated during the reaction is temporarily stored in the upper part of the tank body 1, and the exhaust valve 4 can automatically open and release the pressure when the gas pressure reaches a certain level.

[0028] In one embodiment, the anaerobic treatment device for aquaculture wastewater also includes an inlet pipe 5 and an outlet pipe 6. The outlet end of the inlet pipe 5 is connected to the water inlet at the upper part of the tank body 1, and the inlet end of the outlet pipe 6 is connected to the water outlet at the lower part of the tank body 1. The inlet pipe 5 is provided with an inlet pump 51 and an inlet valve 91, and the outlet pipe 6 is provided with an outlet valve 92.

[0029] In one embodiment, the aquaculture wastewater anaerobic treatment device further includes an emptying pipe 7, an emptying port is provided at the bottom of the tank body 1, and the water inlet end of the emptying pipe 7 is connected to the emptying port at the bottom of the tank body 1. An emptying valve 93 is provided on the emptying pipe 7. When the tank body needs to empty the wastewater inside for maintenance and overhaul, the emptying valve 93 is opened to empty the wastewater in the tank, and all other valves are closed.

[0030] Furthermore, the aquaculture wastewater anaerobic treatment device further comprises a flushing pipe 8, on which a flushing valve 94 is provided. The water inlet end of the flushing pipe 8 is connected to the water inlet pipe 5, the water outlet end of the flushing pipe 8 is connected to the drain port at the bottom of the tank body, and the water inlet end of the flushing pipe 8 is located between the water inlet pump 51 and the water inlet valve 91.

[0031] Optionally, the water inlet valve 91, the flushing valve 94, and the water outlet valve 92 may be solenoid valves, and the drain valve 93 may be a manual valve.

[0032] When the water treatment is in progress, the water inlet valve 91 and the water outlet valve 92 are opened, the flushing valve 94 and the drain valve 93 are closed, the water inlet pump 51 is turned on and switched to a low-frequency state, the wastewater enters the tank body 1 from the water inlet, the motor 2 is in a medium-low speed state, and under the mixing and stirring action of the stirring shaft 3 and the multi-layer blades, the wastewater is fully mixed and reacted with the microorganisms, and the treated wastewater that meets the standards flows out from the water outlet. The anaerobic gas generated during the reaction is temporarily stored in the upper part of the tank body 1, and when the gas pressure reaches a certain level, the exhaust valve 4 automatically opens and releases the pressure.

[0033] When the flushing operation is in progress, the flushing valve 94 and the outlet valve 92 are opened, and the inlet valve 91 and the drain valve 93 are closed. The inlet pump 51 is turned on and switched to a high-frequency state, and a large flow of wastewater impacts the lower part of the tank body 1, dispersing the accumulated solids and mixing them with the wastewater. At the same time, the speed of the motor 2 is switched to a high-speed state. After the flushing reaches the preset time, the flushing valve 94 is closed, the inlet valve 91 is opened, and then the equipment enters the water treatment operation again.

[0034] The utility model provides pipelines and valves such as an inlet pipe 5, an outlet pipe 6, an emptying pipe 7, a flushing pipe 8, an inlet valve 91, a flushing valve 94, an outlet valve 92, and an emptying valve 93, and switches the water inlet path of the wastewater to periodically flush the sediment at the bottom of the tank body 1, thereby ensuring that the equipment has a strong self-cleaning ability while avoiding complex flushing pipeline design, thereby greatly reducing investment costs and operating costs.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anaerobic treatment device for aquaculture wastewater, characterized in that: The invention comprises a tank body, wherein the tank body is provided with a stirring device, wherein the stirring device comprises a motor, a stirring shaft, and an upper blade, a middle blade and a lower blade arranged at intervals on the stirring shaft, wherein the output shaft of the motor is connected to the stirring shaft, and the stirring shaft is arranged in the tank body along the vertical direction, the acute angle between the blade slope of the upper blade and the horizontal plane is 20° to 40°, the angle between the blade slope of the middle blade and the horizontal plane is 90°, the acute angle between the blade slope of the lower blade and the horizontal plane is 20° to 40°, and the inclination direction of the blade slope of the upper blade relative to the stirring shaft is opposite to the inclination direction of the blade slope of the lower blade relative to the stirring shaft.

2. The anaerobic treatment device for aquaculture wastewater according to claim 1, characterized in that: The acute angle between the inclined surface of the upper blade and the horizontal plane is 30°, and the acute angle between the inclined surface of the lower blade and the horizontal plane is 30°.

3. The anaerobic treatment device for aquaculture wastewater according to claim 1, characterized in that: An exhaust valve is arranged on the top of the tank body.

4. The anaerobic treatment device for aquaculture wastewater according to claim 1, characterized in that: It also includes a water inlet pipe and a water outlet pipe, the water outlet end of the water inlet pipe is connected to the water inlet at the upper part of the tank body, the water inlet end of the water outlet pipe is connected to the water outlet at the lower part of the tank body, the water inlet pipe is provided with a water inlet pump and a water inlet valve, and the water outlet pipe is provided with a water outlet valve.

5. The anaerobic treatment device for aquaculture wastewater according to claim 4, characterized in that: It also includes an emptying pipe, on which an emptying valve is arranged, and the bottom of the tank body is provided with an emptying port, and the water inlet end of the emptying pipe is connected to the emptying port.

6. The anaerobic treatment device for aquaculture wastewater according to claim 5, characterized in that: It also includes a flushing pipe, on which a flushing valve is provided, the water inlet end of the flushing pipe is connected to the water inlet pipe, the water outlet end of the flushing pipe is connected to the drain port, and the water inlet end of the flushing pipe is located between the water inlet pump and the water inlet valve.

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