CN212293213U

CN212293213U - Ammonia nitrogen-containing wastewater treatment device

Info

Publication number: CN212293213U
Application number: CN202020603806.0U
Authority: CN
Inventors: 包伟
Original assignee: Qiantong Environmental Technology Suzhou Co ltd
Current assignee: Qiantong Environmental Technology Suzhou Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2021-01-05
Anticipated expiration: 2030-04-21

Abstract

The utility model provides an contain ammonia nitrogen effluent treatment plant, contain ammonia nitrogen effluent treatment plant includes the box, sets up membrane module frame, setting in the box are in hollow fiber membrane silk, setting in the membrane module frame are in water inlet and delivery port, connection on the box the delivery port with outlet pipe, the setting of hollow fiber membrane silk are in nitrogen gas storage tank, connection outside the box are in the nitrogen gas storage tank with two-way gas booster pump between the box, set up the backwash interface of intercommunication outlet pipe on the box, the backwash connect with two-way gas booster pump links to each other, two-way gas booster pump forward pressure boost is in order to follow the air suction in the box, reverse pressure boost in order to air feed in the outlet pipe. The utility model discloses an contain ammonia nitrogen effluent treatment plant through setting up hollow fiber membrane silk to can filter the sewage of getting rid of the ammonia nitrogen.

Description

Ammonia nitrogen-containing wastewater treatment device

Technical Field

The utility model relates to an ammonia nitrogen-containing wastewater treatment device.

Background

High salt waste water and high ammonia nitrogen containing waste water, these two kinds of waste water all belong to the difficult processing waste water, if a kind of waste water has the pollution characteristic of high salinity and high ammonia nitrogen simultaneously, then the processing degree of difficulty of this kind of waste water can be bigger undoubtedly. In industries such as chemical industry, surface treatment, photovoltaic industry and the like, the wastewater with the two pollutants exists, and the treatment difficulty of the wastewater causes that the prior art is difficult to treat to reach a lower pollutant concentration level.

In the denitrification process, most of the technologies are realized by utilizing the biochemical action of microorganisms, and the method is the most economical and effective method at present. However, in this method, the removal of ammonia nitrogen by the metabolism of microorganisms requires nutrient conditions and living environment suitable for their growth. However, the high salinity of the wastewater can greatly inhibit the growth and metabolism of microorganisms, which ultimately results in the limited treatment capacity of the method (according to the research of related scholars, the metabolism of microorganisms is greatly influenced if the salt concentration in the water exceeds 5000 mg/L).

According to biological and kinetic principles, the reaction or metabolic rate is directly proportional to the substrate concentration (in the wastewater, the concentration of the contaminant to be degraded) and the number of microorganisms involved in the reaction or metabolism. That is, the wastewater is required to be denitrified more efficiently because the concentration of the pollutants is constant and the reaction rate is increased, and the optimal means is to increase the number of microorganisms. However, in the existing denitrification technologies, the methods for increasing the number of microorganisms have certain defects, and the most used method is to increase the volume of a reaction tank, which increases the occupied area and causes more obvious technical defects.

In addition, the ammonia nitrogen is finally removed from the wastewater through nitrogen generated by denitrification after the metabolism of the microorganisms and sludge discharge after the microorganisms are solidified in organisms. To realize the second mode, a sedimentation tank or other solid-liquid separation device is often added at the rear end of the biochemical reactor. The traditional sediment sludge discharge method has wide application range, but the limitation is also very obvious: the defects of low surface load (causing large occupied area), easy environmental influence, high effluent suspended matter and the like always restrict the denitrification efficiency.

At present, the traditional method for realizing denitrification treatment comprises the following steps: a denitrification filter tank and a synchronous nitrification/denitrification reactor. The devices all utilize the biological metabolism capability of nitrobacteria and denitrifying bacteria to remove ammonia nitrogen and reduce nitrate nitrogen and nitrite nitrogen in water. Both of these bacteria have high requirements on the salt content of the inlet water, and generally the salt content is required to be below 5000 mg/L. Research shows that bacteria can be cultured in water with the salt concentration of 10000mg/L at most for nitrification and denitrification reaction through certain microbial domestication. Meanwhile, the normally designed denitrification volume load range is 0.3-1.6 (kgNO3-N)/(m 3. d), the volume load limits the whole size of the equipment, and the denitrification filter tank is often used as a deep denitrification process, and is suitable for treating nitrate nitrogen with the concentration below 25mg/L, otherwise, the height and the floor area of the denitrification filter tank are greatly increased.

The synchronous nitrification/denitrification reactor is a process widely used under higher ammonia nitrogen level, and has the following main advantages: low cost, simple operation, synchronous carbon and nitrogen removal, but has more defects. Because the nitrification/denitrification reactor has single strain and meets the requirement of synchronous carbon and nitrogen removal, the final treated effluent can hardly reach a higher level, and in some areas or industrial wastewater with higher discharge standard, a set of advanced treatment system is still added at the rear end of the nitrification/denitrification reactor, but the cost is increased. Similarly, the device cannot be used normally in high-salinity water.

Meanwhile, the effluent of the denitrification filter tank or the synchronous nitrification/denitrification reactor often has no better clarity, and a sedimentation system or a solid-liquid separation system is often required to be arranged at the rear end to separate the sludge from the liquid.

In view of the above, there is a need to improve the existing ammonia nitrogen containing wastewater treatment device to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an contain ammonia nitrogen effluent treatment plant to ammonia nitrogen is difficult to get rid of in solving prior art sewage, and still need additionally set up solid-liquid separation equipment after getting rid of the ammonia nitrogen and lead to the problem that the cost rises.

In order to realize the above purpose, the utility model provides an contain ammonia nitrogen effluent treatment plant includes the box, sets up membrane module frame, setting in the box are in hollow fiber membrane silk, setting in the membrane module frame are in water inlet and delivery port, connection on the box the delivery port with outlet pipe, the setting of hollow fiber membrane silk are in nitrogen gas storage tank, connection outside the box are in the nitrogen gas storage tank with two-way gas booster pump between the box, set up the backwash interface of intercommunication outlet pipe on the box, the backwash interface with two-way gas booster pump links to each other, two-way gas booster pump forward pressure boost is in order to follow the air suction in the box, reverse pressure boost in order to the air feed in the outlet pipe.

As a further improvement of the utility model, the bidirectional gas booster pump and the top of the box body are connected through the outlet duct, a plurality of exhaust valves are arranged on the outlet duct.

As a further improvement of the utility model, the box top is equipped with the gas collecting channel, the outlet duct with the gas collecting channel links to each other.

As a further improvement of the utility model, the top inner wall of the box is provided with a three-phase separator, so as to lead the air of the box into the gas collecting channel.

As a further improvement, the nitrogen storage tank is provided with a pneumatic triple piece for removing air impurities and an air-vent valve for controlling the box air supply pressure.

As a further improvement of the utility model, the outlet pipe includes a plurality of opening orientations the son water pipe of membrane group frame and with son water piping connection's mother water pipe, son water pipe with the upper end of hollow fiber membrane silk is linked together.

As a further improvement of the utility model, the outlet pipe is located the top of membrane group frame, female water pipe is located the son water pipe is kept away from the one end of membrane group frame, female water pipe with the delivery port is connected.

As a further improvement, in the box the membrane module below is equipped with row's mud landslide, sludge accumulation portion and sludge discharge pipe, the sludge discharge pipe with sludge accumulation portion connects for discharge mud, the slope of row's mud landslide sets up, has high-end and low side, sludge accumulation portion is located the below of low side.

As a further improvement of the utility model, the ammonia nitrogen-containing wastewater treatment device further comprises a water distribution plate, and the water distribution plate is positioned in the membrane group frame and between the water inlets, a plurality of water distribution holes are formed in the water distribution plate.

As a further improvement of the utility model, be equipped with on the box and wash water inlet clear water and wash the mouth to it is right to wash into the clear water hollow fiber membrane silk.

The utility model has the advantages that: the device for treating wastewater containing ammonia nitrogen can filter the sewage without ammonia nitrogen by arranging the hollow fiber membrane yarns; the sludge in the box body can be periodically removed by arranging the sludge discharge landslide, the sludge accumulation part and the sludge discharge pipe, so that the amount of microorganisms is controlled; through setting up nitrogen gas storage tank and two-way gaseous booster pump, can utilize the nitrogen gas that produces to carry out the backwash to hollow fiber membrane, and can not increase the interior oxygen content of box, improve the survival rate of microorganism.

Drawings

FIG. 1 is a schematic structural view of an ammonia nitrogen-containing wastewater treatment apparatus according to the present invention;

FIG. 2 is a schematic diagram of the internal structure of the ammonia nitrogen-containing wastewater treatment device of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 2, the utility model discloses an ammonia nitrogen-containing wastewater treatment device 100 includes box 1, sets up membrane stack frame 2, setting in the box 1 are in hollow fiber membrane silk 3, outlet pipe 4, setting in the membrane stack frame 2 are in nitrogen gas storage tank 5, the connection outside the box 1 nitrogen gas storage tank 5 with two-way gas booster pump 6, three-phase separator 7, water distribution board 8, row's mud landslide 9, mud portion of piling up 10, mud pipe between the top of box 1.

The box body 1 is provided with a water inlet 11, a water outlet 12, a circulating stirring inlet 13, a circulating stirring outlet 14, an access hole 15, a nutrient solution inlet 17, a cleaning water inlet 18, a chemical cleaning solution inlet 19, a sludge discharge port 20, a sampling port 21, a clear water flushing port 22 and a backwashing interface 24 connected with the water outlet pipe 4, and the top of the box body 1 is provided with a gas collecting hood 23. And microorganisms and sludge are arranged in the box body 1, and the microorganisms are used for decomposing ammonia nitrogen in the sewage.

The water inlet 11 is used for introducing sewage to be treated, particularly sewage containing ammonia nitrogen and high salt, and the water outlet 12 is connected with the water outlet pipe 4 and used for discharging water from which ammonia nitrogen is removed. The water inlet 11 is arranged below the membrane group frame 2 in the height direction, and the water outlet 12 is arranged above the membrane group frame 2 in the height direction. In other embodiments, the positions of the water inlet 11 and the water outlet 12 may be changed.

Circulation stirring import 13 and circulation stirring export 14 are used for connecting external agitating unit to the effect of stirring is carried out to the water in the box 1 to the realization, makes mud and microorganism and sewage contact more abundant.

Be equipped with transparent window 16 on access hole 15 to make things convenient for the staff to observe sewage in to box 1, transparent window 16 can open, and is right 1 internal installation of box overhauls.

The nutrient solution inlet 17 is used for introducing nutrient solution to assist the growth of microorganisms and improve the decomposition efficiency of the microorganisms; the cleaning water inlet 18 and the cleaning water flushing port 22 are used for introducing cleaning water to clean the hollow fiber membrane wires 3 and remove sludge adhered to the surfaces of the hollow fiber membrane wires 3, and the cleaning water inlet 18 and the cleaning water flushing port 22 are respectively arranged at one side close to and far away from the water inlet 11; the chemical cleaning liquid inlet 19 is used for introducing acid or alkali for cleaning the hollow fiber membrane wires 3, and chemical reagents are introduced after the operation is carried out for a long time, so that the deep cleaning of the hollow fiber membrane wires 3 can be realized.

The sludge discharge port 20 is communicated with the sludge discharge pipe, and the sludge discharge pipe is communicated with the sludge accumulation part 10 and is used for discharging sludge in the box body 1. The sampling port 21 is used for sampling the sewage in the box body 1. The time and interval for opening the sludge discharge port 20 are controlled, so that the effect of controlling the amount of sludge and microorganisms in the box body 1 can be realized.

The gas collecting hood 23 is used for connecting with the bidirectional gas booster pump 6 so as to collect the air in the box body 1 and guide the air into the nitrogen storage tank 5.

The backwashing connector 24 is connected with the bidirectional gas booster pump 6 through a gas inlet pipe.

The membrane group frame 2 is arranged in the middle of the box body 1 and fixed on the box body 1, preferably, the membrane group frame 2 is made of stainless steel materials and mainly plays a role in supporting the hollow fiber membrane wires 3.

The hollow fiber membrane filaments 3 are used for isolating microorganisms and sludge produced by the metabolism of the microorganisms. The produced water subjected to the filtration action of the hollow fiber membrane filaments 3 can enter the inside of the hollow fiber membrane filaments 3. The hollow fiber membrane yarn 3 of this embodiment has replaced the ordinary filler among the prior art, can get rid of the granule diameter in the sewage and be greater than 0.001 micron, through the water of hollow fiber membrane yarn 3 filtration can directly get into the rear end and carry out the advanced treatment, does not need other solid-liquid separation to handle in the middle of.

The water outlet pipe 4 is positioned above the membrane group frame 2 and below the three-phase separator 7. The water outlet pipe 4 comprises a plurality of sub water pipes 41 which are opened towards the membrane group frame 2 and a mother water pipe 42 connected with the sub water pipes 41.

The water sub-pipes 41 extend in the vertical direction, and each water sub-pipe 41 is communicated with the upper ends of the hollow fiber membrane filaments 3 so as to transfer water in the hollow fiber membrane filaments 3 into the water sub-pipe 41.

The mother water pipe 42 is located the son water pipe 41 is kept away from the one end of the membrane group frame 2, the mother water pipe 42 is horizontally arranged, the side wall of the mother water pipe 42 is communicated with the son water pipes 41, one end of the mother water pipe 42 is connected with the water outlet 12, and the other end of the mother water pipe is provided with a mother pipe end enclosure 43 to seal the mother water pipe 42. The sub-water pipe 41 transfers the filtered water in the hollow fiber membrane filaments 3 into the mother water pipe 42 and discharges the water from the water outlet 12.

In the height direction, the water distribution plate 8 is located between the membrane module frame 2 and the water inlet 11, and a plurality of water distribution holes 81 are formed in the water distribution plate 8. The water distribution holes 81 are used for allowing sewage and sludge to pass through, and the arrangement of the plurality of water distribution holes 81 can enable the sewage to flow upwards more uniformly. So that the hollow fiber membrane filaments 3 at various positions can be sufficiently contacted with the sewage.

Mud discharging landslide 9, sludge accumulation portion 10, mud discharging pipe set up in box 1 below membrane stack frame 2, further, mud discharging landslide 9, sludge accumulation portion 10, mud discharging pipe are located in the direction of height the below of water inlet 11. The sludge discharge pipe is connected to the sludge accumulating portion 10 to discharge sludge. The sludge discharge landslide 9 is obliquely arranged and provided with a high end 91 and a low end 92, and the sludge accumulation part 10 is positioned below the low end 92, so that sludge falling on the sludge discharge landslide 9 can conveniently slide to the sludge accumulation part 10. The content of microorganisms in the box body 1 can be controlled by regularly discharging sludge.

The three-phase separator 7 is arranged on the inner wall of the top of the box body 1. The three-phase separator 7 separates solid and liquid gases to introduce the air in the box 1 into the gas-collecting hood 23, and further into the nitrogen storage tank 5 from the gas-collecting hood 23 for storage.

The bidirectional gas booster pump 6 is used for positively boosting to suck air out of the box body 1, the air in the box body 1 is air with high nitrogen content, and the nitrogen is obtained by decomposing ammonia nitrogen in sewage by microorganisms. When the bidirectional gas booster pump 6 is used for reversely boosting, nitrogen-containing air is injected into the water outlet pipe 4, and the air enters the hollow fiber membrane filaments 3 from the water outlet pipe 4 to escape from the interior of the hollow fiber membrane filaments 3, so that backwashing on the hollow fiber membrane filaments 3 is realized. Through to the air feed in the box 1 to can realize to the hollow fiber membrane silk 3 backwash effect, and can guarantee simultaneously the interior low oxygen environment of box 1 improves the quantity and the survival rate of microorganism, improves the decomposition capacity, makes the microorganism also can survive in the sewage of higher salinity.

The bidirectional gas booster pump 6 is connected with the gas collecting hood 23 on the top of the box body 1 through a gas outlet pipe 51. In this embodiment, the number of the gas collecting hoods 23 is plural, and the gas outlet pipe 51 is provided with a plurality of exhaust valves 52, and the exhaust valves 52 are used for exhausting part of the air led out from the box body 1.

The nitrogen storage tank 5 is provided with a pneumatic triple piece 53 and a pressure regulating valve 54 for controlling the pressure of the supplied gas into the tank 1. Pneumatic trigeminy piece 53 can play the effect of filtering impurity, air-vent valve 54 can control atmospheric pressure in the nitrogen gas storage tank 5 improves factor of safety.

The utility model discloses an contain 100 working processes of ammonia nitrogen effluent treatment plant as follows:

sewage is introduced into the box body 1 through the water inlet 11, an external stirring device stirs the sewage in the box body 1, so that sludge and microorganisms in the box body 1 are in full contact reaction with the sewage, and the treated water enters the water outlet pipe 4 through the filtering action of the hollow fiber membrane wires 3 and is discharged from the water outlet 12; the generated nitrogen is separated by a three-phase separator 7, enters a gas-collecting hood 23 and finally enters a nitrogen storage tank 5 for storage; when backwashing is needed, air in the nitrogen storage tank 5 is introduced into the tank body 1; when sludge needs to be discharged, the sludge discharge port 20 is opened, and the sludge discharge time is controlled, so that the amount of sludge and microorganisms in the box body 1 can be controlled; when the hollow fiber membrane wires 3 need to be cleaned, the cleaning water inlet 18 and the clean water flushing port 22 are opened, water is supplied inwards, and the surfaces of the hollow fiber membrane wires 3 can be cleaned.

The device 100 for treating wastewater containing ammonia nitrogen of the utility model is provided with the hollow fiber membrane filaments 3, so that the wastewater without ammonia nitrogen can be filtered; the sludge in the box body 1 can be periodically removed by arranging the sludge discharge landslide 9, the sludge accumulation part 10 and the sludge discharge pipe, so that the amount of microorganisms is controlled; through setting up nitrogen gas storage tank 5 and two-way gas booster pump 6, can utilize the nitrogen gas of production to carry out the backwash to hollow fiber membrane, and can not increase 1 interior oxygen content of box, improve the survival rate of microorganism.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides an contain ammonia nitrogen effluent treatment plant which characterized in that: the ammonia nitrogen-containing wastewater treatment device comprises a box body, a membrane group frame arranged in the box body, hollow fiber membrane filaments arranged in the membrane group frame, a water inlet and a water outlet arranged on the box body, a water outlet pipe connected with the water outlet and the hollow fiber membrane filaments, a nitrogen storage tank arranged outside the box body, and a bidirectional gas booster pump connected between the nitrogen storage tank and the box body, wherein a backwashing interface communicated with the water outlet pipe is arranged on the box body, the backwashing interface is connected with the bidirectional gas booster pump, and the bidirectional gas booster pump is used for positively boosting to suck air out of the box body and reversely boosting to supply air into the water outlet pipe.

2. The apparatus for treating wastewater containing ammonia nitrogen according to claim 1, characterized in that: the bidirectional gas booster pump is connected with the top of the box body through an air outlet pipe, and a plurality of exhaust valves are arranged on the air outlet pipe.

3. The apparatus for treating wastewater containing ammonia nitrogen according to claim 2, characterized in that: the top of the box body is provided with a gas collecting hood, and the gas outlet pipe is connected with the gas collecting hood.

4. The apparatus for treating wastewater containing ammonia nitrogen according to claim 3, characterized in that: and a three-phase separator is arranged on the inner wall of the top of the box body so as to guide the air of the box body into the air collecting hood.

5. The apparatus for treating wastewater containing ammonia nitrogen according to claim 1, characterized in that: and the nitrogen storage tank is provided with a pneumatic triple piece for removing air impurities and a pressure regulating valve for controlling the air supply pressure to the tank body.

6. The apparatus for treating wastewater containing ammonia nitrogen according to claim 1, characterized in that: the water outlet pipe comprises a plurality of sub water pipes with openings facing the membrane group frame and a mother water pipe connected with the sub water pipes, and the sub water pipes are communicated with the upper ends of the hollow fiber membrane filaments.

7. The apparatus for treating wastewater containing ammonia nitrogen according to claim 6, characterized in that: the water outlet pipe is located above the membrane group frame, the mother water pipe is located at one end, away from the membrane group frame, of the child water pipe, and the mother water pipe is connected with the water outlet.

8. The apparatus for treating wastewater containing ammonia nitrogen according to claim 1, characterized in that: in the box be equipped with mud slide, mud accumulation portion and sludge discharge pipe below the membrane module frame, the sludge discharge pipe with mud accumulation portion connects for discharge mud, mud slide slope sets up, has high-end and low-end, mud accumulation portion is located the below of low-end.

9. The apparatus for treating wastewater containing ammonia nitrogen according to claim 1, characterized in that: the ammonia nitrogen-containing wastewater treatment device further comprises a water distribution plate, wherein the water distribution plate is positioned between the membrane group frame and the water inlet in the height direction, and a plurality of water distribution holes are formed in the water distribution plate.

10. The apparatus for treating wastewater containing ammonia nitrogen according to claim 1, characterized in that: and a clean water flushing port of a clean water inlet is arranged on the box body so as to flush clean water to clean the hollow fiber membrane yarn.