Reflux device of organic wastewater oxidation system

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a reflux device of an organic wastewater oxidation system, which comprises a feed pipe and a reaction tank, a water pump is arranged on the feed pipe, a reflux tank is arranged at one end of the feed pipe, a bubble generator is arranged on one side of the reflux tank, the bubble generator is communicated with the reaction tank, and the reaction tank is communicated with the water pump. An exhaust pipe is arranged at the top of the reaction tank; a drainage pipe is arranged on the middle upper side of the side wall of the reaction tank; the return tank comprises a connecting seat, a heat exchange tank and a U-shaped pipe, the U-shaped pipe is connected with the water pump and the bubble generator, and a reversing valve is arranged at one end of the drain pipe; the reflux tank is arranged and connected with the drain pipe, heat in drained water is recycled and used for heating inlet wastewater, meanwhile, the wastewater can be directly guided into the U-shaped pipe for reflux recycling and dilution of waste liquid to be treated, additional reaction tanks and corollary equipment are not needed, and the production cost and the equipment investment cost are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field especially relates to an organic wastewater oxidation system backflow device. BACKGROUND

[0002] In recent years, with the development of industrialization, the water resources on which human beings rely for survival are increasingly polluted. One of the main sources of water quality deterioration is the discharge of organic wastewater, especially the wastewater from the petroleum, pesticide and chemical industries. These wastewaters are difficult to remove due to their complex chemical composition, high toxicity, high COD content and other characteristics.

[0003] Currently, the organic wastewater is usually treated by the biological membrane method, the aerobic activated sludge method, the ozone oxidation technology, the wet oxidation process and the micro-evaporation liquid phase oxidation technology. The micro-evaporation liquid phase oxidation technology can be used to treat wastewater at low temperature and low pressure, the reaction pressure is 0.6 MPa, the reaction temperature is 159 DEG C, the reaction tank has low requirements, does not need a noble metal corrosion-resistant coating and has low production cost. However, the sewage treatment effect is limited by the oxidation process, high temperature needs to be maintained, energy consumption is increased, heat loss is caused and energy saving and environmental protection are not met. SUMMARY

[0004] The utility model discloses a kind of organic wastewater oxidation system backflow devices to solve the shortcomings in prior art.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] An organic wastewater oxidation system backflow device, comprising a feed pipe and a reaction tank, a water pump is provided on the feed pipe, a reflux tank is provided at one end of the feed pipe, a gas bubble generator is provided on one side of the reflux tank, the gas bubble generator is communicated with the reaction tank, an exhaust pipe is provided at the top of the reaction tank, and a drain pipe is provided on the upper side of the middle of the side wall of the reaction tank.

[0007] The reflux tank comprises a connecting seat, a heat exchange tank and a U-shaped pipe, the U-shaped pipe is connected with the water pump and the gas bubble generator, a reversing valve is provided at one end of the drain pipe, the two water outlets of the reversing valve are connected with the heat exchange tank and the U-shaped pipe respectively, and a drain valve is provided on one side of the bottom of the heat exchange tank.

[0008] Preferably, the U-shaped pipe is inverted, the water inlet is communicated with the water pump, and a connecting pipe is provided between the water outlet of the bottom of the U-shaped pipe and the gas bubble generator.

[0009] Preferably, a bypass pipe is connected with the top of the U-shaped pipe, the bypass pipe is communicated with the water outlet of the reversing valve, and the reversing valve is communicated with the top of the heat exchange tank.

[0010] Preferably, the U-shaped pipe penetrates through the heat exchange tank, and the heat exchange tank is fixedly connected with the connecting seat.

[0011] Preferably, the bubble generator is provided with an air inlet pipe, and the bubble generator is provided with a gas-liquid mixer and an ultrasonic generator.

[0012] Preferably, the reaction tank is provided with a heater outside, and the drain pipe is provided with a control valve.

[0013] The beneficial effects of the present application are as follows:

[0014] Compared with the prior art, the present application sets a reflux tank, connects a drain pipe, recycles heat in the drain water, heats the wastewater, directly introduces the wastewater into the U-shaped pipe, performs reflux recycling, dilutes the wastewater to be treated, does not need to increase additional reaction tanks and supporting equipment, ensures that the wastewater meets the discharge standard after treatment, reduces production cost and equipment investment cost, and realizes environmental protection and consumption reduction. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 A three-dimensional structure schematic view of the reflux device of the organic wastewater oxidation system is provided in the present application;

[0016] Fig. 2 A front view structure schematic view of the reflux device of the organic wastewater oxidation system is provided in the present application;

[0017] Fig. 3 A reflux tank structure schematic view of the reflux device of the organic wastewater oxidation system is provided in the present application.

[0018] In the figure: 1, feed pipe; 2, reflux tank; 21, connecting seat; 22, drain valve; 23, heat exchange tank; 24, U-shaped pipe; 3, bubble generator; 31, connecting pipe; 4, heater; 5, reaction tank; 6, exhaust pipe; 7, control valve; 8, drain pipe; 9, reversing valve; 91, bypass pipe; 10, water pump. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] REFERENCE Figs. 1-3The utility model provides an organic wastewater oxidation system backflow device, including feed pipe 1 and reaction tank 5, reaction tank 5 outside is equipped with heater 4, carries out heat preservation, ensures organic wastewater oxidation temperature, and organic wastewater is in micro -evaporation micro -boiling state, completes the oxidation decomposition of internal organic matter,

[0021] Feed pipe 1 is equipped with water pump 10 for pumping the organic wastewater to be treated into the oxidation system, one end of feed pipe 1 is equipped with backflow tank 2 for recycling the heat of discharged wastewater, reducing energy consumption and improving energy utilization, one side of backflow tank 2 is equipped with bubble generator 3, air inlet pipe is arranged on bubble generator 3, gas-liquid mixer and ultrasonic generator are arranged in bubble generator 3 for mixing oxygen or ozone into the organic wastewater to form micro-nano small bubbles and improve oxidation efficiency, bubble generator 3 is communicated with the bottom of reaction tank 5 to send the gas-liquid mixture into reaction tank 5, the organic wastewater mixed with oxygen or ozone is oxidized to make the organic matter and ammonia nitrogen in high-concentration and refractory wastewater be oxidized and decomposed into CO2, H2O and N2 and other harmless substances, exhaust pipe 6 is arranged on the top of reaction tank 5 to collect the exhaust gas and steam generated by oxidation and heat and carry out subsequent treatment and recover heat, drain pipe 8 is arranged on the upper side of the middle of the side wall of reaction tank 5, the wastewater in reaction tank 5 flows from bottom to top, and bubbles surge upwards, so the oxidation and decomposition degree of the wastewater in the upper layer is high, and the wastewater is discharged through drain pipe 8, control valve 7 is arranged on drain pipe 8 to control the drainage efficiency,

[0022] Backflow tank 2 includes connecting seat 21, heat exchange tank 23 and U-shaped pipe 24, U-shaped pipe 24 is inverted, the top of U-shaped pipe 24 is arranged at a height corresponding to drain pipe 8, the hydraulic characteristics are utilized to avoid the backflow of wastewater in reaction tank 5, separate feed pipe 1 from reaction tank 5 and avoid the backflow or reverse flow of wastewater in reaction tank 5 or feed pipe 1 after the equipment stops, ensure the smoothness and avoid the blockage caused by the use of one-way valve, U-shaped pipe 24 penetrates heat exchange tank 23, heat exchange tank 23 is fixedly connected with connecting seat 21, U-shaped pipe 24 is used for connecting water pump 10 and bubble generator 3, the water inlet at the bottom of U-shaped pipe 24 is communicated with water pump 10, connecting pipe 31 is arranged between the water outlet at the bottom of U-shaped pipe 24 and bubble generator 3 to complete the flow of waste liquid,

[0023] Drain pipe 8 is equipped with reversing valve 9 at one end, the two water outlets of reversing valve 9 are connected with heat exchange tank 23 and U-shaped pipe 24 respectively to switch the discharge direction of wastewater, bypass pipe 91 is connected with the top of U-shaped pipe 24, bypass pipe 91 is communicated with the water outlet of reversing valve 9, reversing valve 9 is communicated with the top of heat exchange tank 23, drain valve 22 is arranged on one side of the bottom of heat exchange tank 23, the wastewater treated by oxidation has heat, the wastewater is sent into heat exchange tank 23 to preheat the wastewater in U-shaped pipe 24, reduce the heating energy consumption of heater 4, in addition, when the COD content of wastewater is high and cannot be treated completely in single cycle, reversing valve 9 switches the water outlet to directly guide the wastewater into U-shaped pipe 24 to dilute the wastewater to be treated and improve the water temperature.

[0024] In this embodiment, the water pump 10 draws the wastewater to be treated through the feed pipe 1 into the pipeline, passes through the U-shaped pipe 24, stirs in oxygen or ozone by the bubble generator 3, and finally enters the reaction tank 5 to perform the oxidation reaction, while the heater 4 heats and keeps warm the reaction tank 5 to ensure normal oxidation;

[0025] After the organic matter in the organic wastewater is oxidized and decomposed, it is discharged through the drain pipe 8, and the reversing valve 9 controls the discharge direction. If the wastewater after treatment can reach the discharge standard, it is sent to the heat exchange tank 23 to heat the wastewater to be treated in the U-shaped pipe 24 with waste heat, thereby reducing the energy consumption of the heater 4. If the wastewater still cannot reach the discharge standard after the first oxidation reaction, the reversing valve 9 is adjusted to mix the discharged wastewater into the U-shaped pipe 24 for the second oxidation reaction, thereby diluting the wastewater to be treated and increasing the temperature of the wastewater, which can ensure the treatment reliability and reduce the COD concentration in the wastewater without increasing additional reaction tanks 5 in series.

[0026] According to the needs, the reversing valve 9 can be replaced by a flow divider to distribute the discharged wastewater into the heat exchange tank 23 and the U-shaped pipe 24 according to the proportion, so as to realize more refined control. Meanwhile, the drain pipe 8 can be provided with a detection device for detecting the COD concentration in the discharged wastewater in time, so as to automatically control the flow divider and change the flow distribution ratio.

[0027] The above describes only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

[0028] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0029] The foregoing description, for purposes of explanation, has taken a specific application of the subject matter for purposes of explanation. The patentable scope is not limited to the embodiments described herein, but is defined solely by the claims. The embodiments were chosen and described in order to explain the principles of the patentable scope and the practical application and to enable others skilled in the art to understand the patentable scope for various embodiments with various modifications as are suited to the particular use contemplated. Those skilled in the art will appreciate that the conception, unique aspects, specific embodiments disclosed can be readily utilized as a basis for the designing of other structures, methodologies and / or devices for carrying out the several purposes of the present patentable scope. It is important, therefore, that the objectives supported by the claims be attained and that considered includes structural and / or logical equivalents of the elements covered by the claims.

Claims

1. An organic wastewater oxidation system reflux device comprising a feed pipe (1) and a reaction tank (5), characterized in that, The feed pipe (1) is provided with a water pump (10), one end of the feed pipe (1) is provided with a reflux tank (2), one side of the reflux tank (2) is provided with a bubble generator (3), the bubble generator (3) is communicated with a reaction tank (5), the top of the reaction tank (5) is provided with an exhaust pipe (6), the upper side of the middle of the side wall of the reaction tank (5) is provided with a drain pipe (8); The reflux tank (2) comprises a connecting seat (21), a heat exchange tank (23) and a U-shaped pipe (24), the U-shaped pipe (24) connects the water pump (10) and the bubble generator (3), one end of the drain pipe (8) is provided with a reversing valve (9), two water outlets of the reversing valve (9) are connected with the heat exchange tank (23) and the U-shaped pipe (24) respectively, one side of the bottom of the heat exchange tank (23) is provided with a drain valve (22).

2. The reflux device of an organic wastewater oxidation system according to claim 1, characterized in that, The U-shaped pipe (24) is inverted, and the water inlet is communicated with the water pump (10), and the connecting pipe (31) is arranged between the water outlet of the bottom of the U-shaped pipe (24) and the bubble generator (3).

3. The reflux device of an organic wastewater oxidation system according to claim 2, characterized in that, The U-shaped pipe (24) is connected with a bypass pipe (91) at the top, the bypass pipe (91) is communicated with the water outlet of the reversing valve (9), and the reversing valve (9) is communicated with the top of the heat exchange tank (23).

4. The reflux device of an organic wastewater oxidation system according to claim 3, characterized in that, The U-shaped pipe (24) penetrates through the heat exchange tank (23), and the heat exchange tank (23) is fixedly connected with the connecting seat (21).

5. The system according to claim 1, wherein the system further comprises a reflux device. The bubble generator (3) is provided with an air inlet pipe, and the bubble generator (3) is provided with a gas-liquid mixer and an ultrasonic generator.

6. The reflux device of an organic wastewater oxidation system according to claim 1, characterized in that, The outer side of the reaction tank (5) is provided with a heater (4), and the drain pipe (8) is provided with a control valve (7).

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