Efficient ammonia nitrogen removal facility for high-concentration ammonia nitrogen sewage

Abstract

The utility model provides an efficient ammonia nitrogen removal facility for high-concentration ammonia nitrogen sewage, which comprises a sewage pool with anaerobic bacteria, the sewage pool is connected with a water inlet, a water outlet, an aerator pipe, an analyzer and a detector, the detector detects the pH value, the dissolved oxygen concentration and the temperature of the sewage, and the sewage pool is connected with the aerator pipe. The analyzer is used for detecting NH3-N concentration, NO2-N concentration, NO3-N concentration and chemical oxygen consumption of sewage, the sewage pool is connected with a first liquid adding tank used for adjusting the pH value of the sewage, the dissolved oxygen concentration of the sewage in the sewage pool is 0.4 + / -0.1 mg / L, a stirring paddle is rotatably connected in the sewage pool, the first liquid adding tank is connected with a first valve, and the first valve is connected with a second valve. The water inlet is connected with a second valve, the aeration pipe is connected with a third valve, the water outlet is connected with a fourth valve, and the purpose of efficiently removing ammonia nitrogen in sewage is achieved through treatment of the facility.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, especially, relate to a kind of high-concentration ammonia-nitrogen sewage high-efficiency removal ammonia-nitrogen facilities. BACKGROUND

[0002] The state has strict discharge standard to ammonia-nitrogen in sewage, and the discharge of ammonia-nitrogen exceeding standard limit not only violates the relevant standard regulations of the state, but also will lead to eutrophication of water body, and will produce toxic and destructive effect to the safety of aquatic ecosystem.

[0003] Traditional high-concentration ammonia-nitrogen in sewage is generally removed by using aerobic nitrification-anaerobic denitrification process, i.e. ammonia-nitrogen is oxidized to nitrite-nitrogen under aerobic condition, and then nitrite-nitrogen is further oxidized to nitrate-nitrogen, and finally nitrate-nitrogen is reduced to nitrogen gas by organic carbon in sewage under anaerobic condition, and the treatment efficiency of this method is not high. SUMMARY

[0004] Therefore, the utility model aims at providing a kind of high-concentration ammonia-nitrogen sewage high-efficiency removal ammonia-nitrogen facilities, by controlling the content of dissolved oxygen in sewage, ammonia-nitrogen is oxidized to nitrite-nitrogen, and then directly reacts with ammonia-nitrogen which has not been oxidized under the action of anaerobic bacteria to produce nitrogen gas and separate from sewage system, so as to achieve the purpose of high-efficiency removal of ammonia-nitrogen in sewage.

[0005] In order to solve the above technical problems, the technical scheme of the utility model is as follows: a kind of high-concentration ammonia-nitrogen sewage high-efficiency removal ammonia-nitrogen facilities, comprising a sewage tank with anaerobic bacteria, the sewage tank is connected with water inlet, water outlet, aeration pipe, analyzer, detector, the detector detects the pH value, dissolved oxygen concentration and temperature of sewage, the analyzer detects the NH3-N concentration, NO2 - -N concentration, NO3 - -N concentration and chemical oxygen demand of sewage, the sewage tank is connected with a first liquid tank for adjusting the pH value of sewage, the dissolved oxygen concentration of sewage in the sewage tank is between 0.4±0.1 mg / L, the sewage tank is rotatably connected with a stirring paddle, the first liquid tank is connected with a first valve, the water inlet is connected with a second valve, the aeration pipe is connected with a third valve, and the water outlet is connected with a fourth valve.

[0006] The above technical scheme is realized, the anaerobic bacteria is placed in the sewage tank in advance, the sewage is pumped into the sewage tank from the water inlet, the stirring paddle is rotated and the sewage is stirred uniformly after the sewage reaches a certain liquid level, the pH value, dissolved oxygen concentration and temperature of the sewage are detected by the detector after the sewage is stirred uniformly, and the NH3-N concentration, NO2 - -N concentration, NO3 -The concentration of N and the chemical oxygen consumption, when the pH value of the sewage is found to be not up to the requirements, the first valve is opened, the pH value of the sewage is adjusted by adding acid solution or alkali solution, according to the concentration of the dissolved oxygen of the sewage, compressed air is injected into the aeration pipe, the sewage is subjected to micro-aeration, and the concentration of the dissolved oxygen of the sewage is kept between 0.4±0.1 mg / L, after the concentration of NH3-N is reduced to the target value, the aeration pipe and the stirring paddle are closed, the sludge is settled, the fourth valve is opened, and the sewage is discharged or enters the next processing device.

[0007] As a preferred scheme of the utility model, the sewage pool is connected with a second liquid adding tank for storing catalyst.

[0008] The above technical scheme is realized, the catalyst is injected into the sewage pool by opening the fifth valve, and the reaction speed is improved.

[0009] As a preferred scheme of the utility model, the catalyst comprises an iron ion containing solution.

[0010] The above technical scheme is realized, and the reaction speed can be significantly improved.

[0011] As a preferred scheme of the utility model, the aeration pipe is connected with an air compressor, and the third valve comprises an aeration flow regulating valve.

[0012] The above technical scheme is realized, so that the concentration of the dissolved oxygen in the sewage is controlled.

[0013] As a preferred scheme of the utility model, the sewage pool is connected with a sludge discharge port, the sludge discharge port is close to the bottom of the sewage pool, and the sludge discharge port is connected with a sixth valve.

[0014] The above technical scheme is realized, the sixth valve is opened, the aged or excessive sludge is discharged from the sludge discharge port, and meanwhile, the sewage pool can be overhauled through the sludge discharge port.

[0015] As a preferred scheme of the utility model, the stirring paddle comprises a motor, a rotating shaft and a paddle blade, the rotating shaft is driven and rotated by the motor, and the paddle blade is fixed to the rotating shaft and located in the sewage pool.

[0016] The above technical scheme is realized, the motor is started, the rotating shaft drives the paddle blade to rotate, so that the sewage is stirred.

[0017] In summary, the utility model has the following beneficial effects:

[0018] Compared with the traditional equipment, the equipment has the advantages of high processing efficiency, low operating cost, less residual sludge and the like, and is very favorable for energy saving and consumption reduction. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model discloses a structural schematic diagram;

[0020] Fig. 1, sewage pool 21, water inlet 22, water outlet 23, aeration pipe 24, analyzer 25, detector 31, first valve 32, second valve 33, third valve 34, fourth valve 35, fifth valve 36, sixth valve 4, stirring paddle 41, motor 42, rotating shaft 43, paddle 51, first liquid tank 52, second liquid tank 6, sludge outlet 7, air compressor. DETAILED DESCRIPTION

[0021] The utility model discloses a structural schematic diagram.

[0022] A kind of high concentration ammonia nitrogen sewage high-efficiency removal ammonia nitrogen facility, including the sewage pool 1 with anaerobic bacteria.

[0023] Sewage pool 1 is connected with water inlet 21, water outlet 22, aeration pipe 23, analyzer 24, detector 25. Among them, water inlet 21 is located in the lower left corner of sewage pool 1, and second valve 32 is connected on water inlet 21;Water outlet 22 is located in the middle of sewage pool 1, and fourth valve 34 is connected on water outlet 22. Aeration pipe 23 is located at the bottom of sewage pool 1 and is horizontally arranged. Aeration pipe 23 is communicated with air compressor 7, and air compressor 7 is located outside sewage pool 1. Third valve 33 is connected on aeration pipe 23, and third valve 33 is aeration flow regulating valve.

[0024] Detector 25 detects the pH value, dissolved oxygen concentration and temperature of sewage;Analyzer 24 detects the NH3-N concentration, NO2 - Concentration, NO3 - Concentration and chemical oxygen demand of sewage.

[0025] Sewage pool 1 is connected with first liquid tank 51 for adjusting the pH value of sewage, and first liquid tank 51 has acid solution or alkali solution. First valve 31 is connected on first liquid tank 51.

[0026] Stirring paddle 4 is rotatably connected in sewage pool 1, and stirring paddle 4 includes motor 41, rotating shaft 42 and paddle 43. Rotating shaft 42 is driven and rotated by motor 41, and motor 41 is fixed above sewage pool 1. Paddle 43 is fixed on rotating shaft 42 and located in sewage pool 1.

[0027] The lower end of sewage pool 1 is connected with sludge outlet 6, and sludge outlet 6 is close to aeration pipe 23. Sixth valve 36 is connected on sludge outlet 6.

[0028] The sewage tank 1 is connected with a second liquid tank 52 for storing catalyst, and the second liquid tank 52 is connected with a fifth valve 35. The catalyst is an iron ion-containing solution.

[0029] A control panel is connected to the detector 25. The control panel is electrically connected with the first valve 31, the second valve 32, the third valve 33, the air compressor 7, the fourth valve 34, the fifth valve 35 and the sixth valve 36.

[0030] The dissolved oxygen concentration of the sewage in the sewage tank 1 is always kept between 0.4±0.1 mg / L.

[0031] The operation procedure is as follows:

[0032] 1. The sewage with high ammonia nitrogen to be treated is pumped into the sewage tank 1 from the water inlet 21 to a certain liquid level, and a certain amount of anaerobic bacteria is left in the sewage tank 1;

[0033] 2. After the liquid level of the sewage reaches a preset height, the second valve 32 is closed, and the motor 41 is started to mix the sewage in the sewage tank 1 uniformly due to the rotation of the paddle 43;

[0034] 3. After the sewage is mixed uniformly, the pH value, dissolved oxygen, temperature, NH3-N, NO2 - , NO3 - -N and chemical oxygen demand of the sewage in the sewage tank 1 are detected;

[0035] 4. If the pH value of the sewage is found to be not required, the first valve 31 is opened, and an acid solution or a base solution is added to the sewage for adjustment, and then the fifth valve 35 is opened to add catalyst to the sewage;

[0036] 5. According to the concentration of the dissolved oxygen of the sewage, the air compressor 7 is started to perform micro-aeration on the sewage with a dissolved oxygen concentration lower than the required concentration, and the dissolved oxygen concentration of the sewage is always kept between 0.4±0.1 mg / L by adjusting the aeration flow adjusting valve;

[0037] 6. If the NH3-N concentration is reduced to the target value, the air compressor 7 and the motor 41 are closed, the sludge is settled, the fourth valve 34 is opened, and the sewage is discharged or enters the next treatment device; if necessary, the sixth valve 36 is opened, and the sludge is discharged from the sludge outlet 6.

[0038] Of course, the above is only a typical example of the present application, and in addition to this, the present application can have other various specific implementation manners, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A highly efficient ammonia nitrogen removal facility for high-concentration ammonia nitrogen wastewater, characterized by: The utility model relates to a sewage tank (1) with anaerobic bacteria, which is connected with a water inlet (21), a water outlet (22), an aeration pipe (23), an analyzer (24) and a detector (25), the detector (25) detects the pH value, dissolved oxygen concentration and temperature of sewage, the analyzer (24) detects the NH3-N concentration, NO2 - -N concentration, NO3 - -N concentration and chemical oxygen demand of sewage, the sewage tank (1) is connected with a first liquid tank (51) for adjusting the pH value of sewage, the dissolved oxygen concentration of sewage in the sewage tank (1) is between 0.4±0.1 mg / L, the sewage tank (1) is rotatably connected with a stirring paddle (4), the first liquid tank (51) is connected with a first valve (31), the water inlet (21) is connected with a second valve (32), the aeration pipe (23) is connected with a third valve (33), and the water outlet (22) is connected with a fourth valve (34).

2. The facility for efficiently removing ammonia nitrogen from high-concentration ammonia-nitrogen wastewater according to claim 1, characterized in that: The sewage tank (1) is connected with a second liquid tank (52) for storing catalyst, and the second liquid tank (52) is connected with a fifth valve (35).

3. The facility for efficiently removing ammonia nitrogen from high-concentration ammonia-nitrogen wastewater according to claim 2, characterized in that: The catalyst comprises an iron ion-containing solution.

4. The facility for efficiently removing ammonia nitrogen from high-concentration ammonia-nitrogen wastewater according to claim 1, characterized in that: The aeration pipe (23) is connected with an air compressor (7), and the third valve (33) comprises an aeration flow adjusting valve.

5. The facility for efficiently removing ammonia nitrogen from high-concentration ammonia-nitrogen wastewater according to claim 1, characterized in that: The sewage tank (1) is connected with a sludge discharge port (6), the sludge discharge port (6) is close to the bottom of the sewage tank (1), and the sludge discharge port (6) is connected with a sixth valve (36).

6. The facility for efficiently removing ammonia nitrogen from high-concentration ammonia-nitrogen wastewater according to claim 1, characterized in that: The stirring paddle (4) comprises a motor (41), a rotating shaft (42) and a paddle blade (43), the rotating shaft (42) is driven and rotated by the motor (41), and the paddle blade (43) is fixed to the rotating shaft (42) and located in the sewage tank (1).

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