Secondary bioreactor

Abstract

The utility model relates to a secondary bioreactor which comprises a primary reaction water tank, an aeration pump, an aeration pipe, an aeration disc, an air inlet pipe and a secondary reaction water tank, the primary reaction water tank and the secondary reaction water tank are both provided with aeration holes and exhaust ports, the air inlet pipe is connected with the aeration pump and enters the reaction water tank through the aeration holes, the bottom end of the air inlet pipe is connected with the aeration disc, and the bottom end of the air inlet pipe is connected with the aeration disc. The aeration disc is connected with a horizontally arranged aeration pipe; a filter screen is connected between the primary reaction water tank and the secondary reaction water tank; a water inlet is formed in the top of the primary reaction water tank, and a water outlet is formed in the secondary reaction water tank; biological sponge fillers are arranged in the primary reaction water tank and the secondary reaction water tank. The device has the advantages that the moving bed bio-membrane reactor is adopted, two reaction water tanks are used for conducting secondary treatment on circulating wastewater, the problem of circulating water pollution in the vehicle leak detection process is solved, and secondary pollution to a tested vehicle is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of water treatment, especially relates to a two-stage moving bed biofilm reactor for treating and detecting vehicle leakage circulating water. BACKGROUND

[0002] The automobile production coating process introduces hollow wax and other chemicals, which makes the paint surface of the vehicle body bright, but the un-dried excess hollow wax and other chemicals are dissolved in the circulating water during the vehicle leakage detection process, which not only pollutes the circulating water and is difficult to remove, but also causes secondary pollution to the test vehicle.

[0003] The automobile production assembly plant has a high requirement for the utilization rate of building space, and the traditional water treatment process cannot efficiently treat sewage. The moving bed biofilm reactor process has the advantages of both traditional fluidized bed and biological contact oxidation method, and is a new type of efficient sewage treatment method.

[0004] The moving bed biofilm reactor uses the basic principle of biofilm method, adds a certain amount of suspended carrier to the reaction device, increases the biomass and biological species in the reaction device, and thus improves the treatment efficiency of the reaction device. This process is also affected by many factors. 1) The selection of suspended filler directly determines the removal rate of special pollutants in wastewater and the final water treatment effect; 2) The filler in the reaction device is in a fluidized state by aeration and water flow lifting, and in actual engineering, local filler accumulation phenomenon is prone to occur; 3) The control of aeration amount, in actual engineering, excessive or insufficient aeration is prone to occur. SUMMARY

[0005] The utility model discloses a two-stage biological reactor, solve the circulating water pollution problem in the vehicle leakage detection process, reduce the secondary pollution to the test vehicle.

[0006] To achieve the above object, the utility model discloses the following technical scheme:

[0007] A two-stage biological reactor, including primary reaction water tank, aeration pump, aeration pipe, aeration disc, air inlet pipe, secondary reaction water tank, primary reaction water tank, secondary reaction water tank are equipped with aeration hole, exhaust port, air inlet pipe is connected with aeration pump, and air inlet pipe enters into the reaction water tank through aeration hole, and the bottom end of air inlet pipe is connected with aeration disc, and aeration disc is connected with horizontally arranged aeration pipe;Filter screen is connected between primary reaction water tank and secondary reaction water tank;The top of primary reaction water tank is equipped with water inlet, and secondary reaction water tank is equipped with water outlet;Biological sponge filler is arranged in primary reaction water tank and secondary reaction water tank.

[0008] Filter screen is connected between primary reaction water tank and secondary reaction water tank.

[0009] The communicating pipe is connected to the upper part of the primary reaction water tank and the secondary reaction water tank.

[0010] The aeration disc is arranged at the bottom of the reaction water tank.

[0011] The primary reaction water tank and the secondary reaction water tank are both cylindrical.

[0012] The primary reaction water tank is more than two.

[0013] The exhaust port is connected with the exhaust pipeline.

[0014] The biological sponge filler is polyurethane biological sponge filler, and the biological sponge filler is rectangular.

[0015] The mesh of the filter screen is smaller than the size of the biological sponge filler.

[0016] The primary reaction water tank and the secondary reaction water tank are both provided with an observation window.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The secondary biological reactor adopts a moving bed biological membrane reactor, and the circulating wastewater is subjected to secondary treatment by two reaction water tanks, so that the circulating water pollution problem in the vehicle leak detection process is solved, and the secondary pollution to the test vehicle is reduced.

[0019] 2. The secondary biological reactor adopts biological sponge filler to aerate the circulating wastewater, without the need of additional chemical agents, which is friendly to operators and does not pollute the environment. Moreover, the service life of the biological sponge filler is 6-10 years, and it is basically maintenance-free.

[0020] 3. The primary reaction water tank and the secondary reaction water tank of the secondary biological reactor both adopt bottom aeration, and the bottom is not provided with a sludge discharge port. The sludge is lifted by aeration, and the treated circulating water and the sludge are pumped back together. The circulating water after filtering the sludge is sent into the recycled water tank, can be reused, and meets the requirement of high space utilization rate of the vehicle leak detection. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] In the drawing: 1-observation window 2-exhaust port 3-aeration hole 4-primary reaction water tank 5-air inlet pipe 6-aeration disc 7-aeration pipe 8-secondary reaction water tank 9-aeration bubble 10-biological sponge filler 11-filter screen 12-water outlet 13-aeration pump 14-water inlet. DETAILED DESCRIPTION

[0023] The utility model will be described in detail below in conjunction with the drawings of the specification, but it should be pointed out that the implementation of the utility model is not limited to the following embodiments.

[0024] See Figure 1 A secondary biological reactor, including primary reaction water tank 4, aeration pump 13, aeration pipe 7, aeration disc 6, air inlet pipe 5, secondary reaction water tank 8, primary reaction water tank 4, secondary reaction water tank 8 are equipped with aeration hole 3, exhaust port 2, air inlet pipe 5 is connected with aeration pump 13, air inlet pipe 5 enters into the reaction water tank through aeration hole 3, and the bottom end of air inlet pipe 5 is connected with aeration disc 6, aeration disc 6 is connected with horizontally arranged aeration pipe 7;Air inlet pipe 5 is connected with pressure gauge and valve, to detect the inlet pressure and adjust the air intake. Primary reaction water tank 4, secondary reaction water tank 8 are connected with filter screen 11. Primary reaction water tank 4 top is equipped with water inlet 14, and the circulating wastewater enters primary reaction water tank 4 by water inlet 14. The lower part of secondary reaction water tank 8 is equipped with water outlet 12, and the treated circulating water is discharged by water outlet 12. Primary reaction water tank 4, secondary reaction water tank 8 are filled with biological sponge filler 10, and the specific gravity of biological sponge filler 10 is similar to that of water, which can be suspended in circulating wastewater. Aeration disc 6 is arranged at the bottom of the reaction water tank. Exhaust port 2 is connected with exhaust pipe, which is used for discharging carbon dioxide and other gases discharged during the reaction process.

[0025] Primary reaction water tank 4, secondary reaction water tank 8 are connected with communication pipeline, and both ends of the communication pipeline are connected with filter screen 11. The mesh of filter screen 11 is smaller than the size of polyurethane biological sponge filler, which prevents biological sponge filler 10 from flowing out and blocking the pipeline. The communication pipe is connected to the upper part of primary reaction water tank 4 and secondary reaction water tank 8, which ensures that the circulating water in primary reaction water tank 4 flows into secondary reaction water tank 8 after sufficient aeration. Primary reaction water tank 4 and secondary reaction water tank 8 are cylindrical, which is convenient for fluidization and reduces the damage to the filler caused by sharp corners. Primary reaction water tank 4 and secondary reaction water tank 8 are made of PP material, and air inlet pipe 5 is a PP hard pipe with threads at the upper part, which is screwed with aeration hole 3. By screwing air inlet pipe 5, aeration disc 6 is lifted to the vicinity of the observation port, and the maintenance of aeration disc 6 and aeration pipe 7 is carried out.

[0026] According to different water quality and water quantity, primary reaction water tank 4 can be 2-5, which can be used in parallel and series, that is, the secondary biological reactor is used in parallel and series.

[0027] Biological sponge filler 10 is polyurethane biological sponge filler, and the specific gravity of biological sponge filler 10 is close to that of water, and the shape is rectangular, preferably a regular cube.

[0028] An observation window 1 is arranged beside the water inlet 14 of the primary reaction water tank 4, facilitating observation of the water inlet condition. An observation window 1 is arranged on the top of the secondary reaction water tank 8, close to the connection between the secondary reaction water tank 8 and the communication pipeline, facilitating observation of the water inlet condition of the secondary reaction water tank 8. In addition, a liquid level meter is arranged in the secondary reaction water tank 8, for detecting the liquid level in the secondary reaction water tank 8.

[0029] The circulating wastewater after removal of large-particle pollutants by mechanical equipment (mainly filter) flows into the primary reaction water tank 4 through the water inlet 14 for biodegradation reaction. Air is pumped into the primary reaction water tank 4 by the aeration pump 13, flows through the air inlet pipe 5 and the aeration disc 6, and is discharged from the aeration pipe 7. The aeration bubbles 9 dissolve in water, and the aeration bubbles 9 hold up the biological sponge filler 10 in water. The biological sponge filler 10 is a square and hard polyurethane biological sponge. The aeration mode is intermittent aeration. The aeration enables the surface of the biological sponge filler 10 to perform aerobic reaction and form a biological membrane, which adsorbs organic pollutants and hollow wax in the wastewater. The interior of the biological sponge filler 10 performs anaerobic and anoxic reaction, effectively degrading insoluble organic matter, and removing nitrogen and phosphorus, thereby generating carbon dioxide and sludge. The carbon dioxide is discharged from the exhaust port 2. The effluent flows into the secondary reaction water tank 8 through the communication pipeline by gravity overflow, and further removes insoluble organic matter, hollow wax, nitrogen, phosphorus and other pollutants by the aeration system of the secondary reaction water tank 8. The wastewater is discharged from the water outlet 12 and pumped back to the reuse water tank. A filter is arranged before the reuse water tank, which can simultaneously remove sludge.

[0030] The primary reaction water tank 4 and the secondary reaction water tank 8 both adopt bottom aeration, and the bottom is not provided with a sludge discharge port. The sludge is held up by aeration, and the water pump pumps the treated circulating water and sludge back together. The circulating water after filtration of the sludge is sent to the reuse water tank.

[0031] The utility model adopts the mobile bed biological membrane reactor, utilizes two reaction water tanks to carry out two-stage treatment to the circulating wastewater, solves the problem of circulating water pollution in the vehicle leak detection process, and reduces secondary pollution to the test vehicle. Meanwhile, the two-stage treatment also reduces the space occupation area, and meets the requirement of high space utilization rate of vehicle leak detection. The utility model adopts the polyurethane biological sponge filler to carry out aeration treatment to the circulating wastewater, does not need to add chemical reagent, is friendly to the operator, and does not pollute the environment. In addition, the service life of the biological sponge filler 10 is 6-10 years, and it is basically maintenance-free.

[0032] Those skilled in the art can easily implement the present application through the above specific embodiments. However, it should be understood that the present application is not limited to the above specific embodiments. On the basis of the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to realize different technical solutions. Due to the limited length and in order to make the description brief, each solution formed by the combination of these technical features is not described one by one. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A two-stage bioreactor, characterized in that, The utility model provides a kind of biological aerated filter, including primary reaction water tank, aeration pump, aeration pipe, aeration disc, air inlet pipe, secondary reaction water tank, primary reaction water tank, secondary reaction water tank are equipped with aeration hole, exhaust port, air inlet pipe is connected with aeration pump, air inlet pipe enters into reaction water tank through aeration hole, and air inlet pipe bottom end is connected with aeration disc, aeration disc is connected with the aeration pipe of horizontal arrangement;Primary reaction water tank, secondary reaction water tank are connected with filter screen between;The top of the primary reaction water tank is equipped with water inlet, and the secondary reaction water tank is equipped with water outlet;Primary reaction water tank, secondary reaction water tank are equipped with biological sponge filling in.

2. A two-stage bioreactor according to claim 1, wherein, The primary reaction water tank, the secondary reaction water tank are connected with the communication pipeline, and the communication pipeline is connected with the filter screen at both ends.

3. A two-stage bioreactor according to claim 2, wherein, The communication pipe is connected to the upper part of the primary reaction water tank and the secondary reaction water tank.

4. The two-stage bioreactor of claim 1, wherein, The aeration disc is arranged at the bottom of the reaction water tank.

5. The secondary bioreactor of claim 1, wherein, The primary reaction water tank and the secondary reaction water tank are both cylindrical.

6. The secondary bioreactor of claim 1, wherein, The primary reaction water tank is more than two.

7. The secondary bioreactor of claim 1, wherein, The exhaust port is connected with the exhaust pipe.

8. The secondary bioreactor of claim 1, wherein, The biological sponge filling is polyurethane biological sponge filling, and the biological sponge filling is rectangular.

9. The secondary bioreactor of claim 1, wherein, The mesh of the filter screen is smaller than the size of the biological sponge filling.

10. The secondary bioreactor of claim 1, wherein, The top of the primary reaction water tank and the secondary reaction water tank are both equipped with an observation window.

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