CN212655657U

CN212655657U - High ammonia-nitrogen concentration effluent disposal system

Info

Publication number: CN212655657U
Application number: CN202021121850.4U
Authority: CN
Inventors: 苏小耀; 蔡剑; 姜永波
Original assignee: Hynar Water Group Corp
Current assignee: Hynar Water Group Corp
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-03-05
Anticipated expiration: 2030-06-16

Abstract

The utility model discloses a high ammonia nitrogen effluent disposal system, blow off device, water installations, ammonia absorption tank, transfer sour pond, good oxygen pond and oxygen deficiency pond including the aeration, water installations and ammonia absorption tank are installed respectively in the both sides that the aeration blows off the device, and sewage loops through the aeration and blows off the device, transfers sour pond, good oxygen pond and oxygen deficiency pond can get rid of the ammonia nitrogen toxicant in the sewage. The utility model discloses a high ammonia nitrogen wastewater treatment system utilizes biochemical combination technology to get rid of low water content high ammonia nitrogen waste water, reduces the impact to follow-up biochemical system, can satisfy the blowdown standard that has the limited requirement to the play water ammonia nitrogen.

Description

High ammonia-nitrogen concentration effluent disposal system

Technical Field

The utility model belongs to the technical field of sewage treatment, concretely relates to high ammonia-nitrogen wastewater treatment system.

Background

The high ammonia nitrogen wastewater mainly comes from chemical fertilizers, coking, petrifaction, pharmacy, foods, refuse landfills and the like, and a large amount of ammonia nitrogen wastewater is discharged into a water body, so that not only is the water body eutrophication caused, but also the water body is black and smelly, the difficulty and the cost of water supply treatment are increased, and even toxic action is generated on crowds and organisms. At present, with the rapid development of the industries such as chemical fertilizers, petrochemical industry and the like, the generated high ammonia nitrogen wastewater also becomes one of the industry development restriction factors; according to the report, red tide occurs up to 77 times in 2001 in China's sea area, ammonia nitrogen is one of important causes of pollution, in particular to pollution caused by high-concentration ammonia nitrogen wastewater. Therefore, the economic and effective control of high concentration pollution is also an important subject of current research by environmental protection workers, and is highly regarded by the industry.

The current general technology for treating ammonia nitrogen in sewage comprises the following steps:

a physical and chemical method: stripping, zeolite deamination, membrane separation, MAP precipitation, chemical oxidation, etc.

A biological denitrification method: AO method, short-cut nitrification and denitrification, anaerobic ammonia oxidation (ANAMMOX), and completely autotrophic nitrogen removal (CANON).

No matter ammonia distillation (steam stripping) or blowing-off + A/O or blowing-off + chemical precipitation, the pretreatment process with high investment and high operation cost can be avoided. The one-time investment of ammonia distillation is too large, and the power consumption of stripping is too large; the continuous A/O method has high investment, large occupied area and strict requirements on pretreated effluent (such as NH)₃N must be less than 300mg/l, and the stripping or blowing-off method cannot meet the requirement on high-concentration ammonia nitrogen wastewater more than 5000mg/l at all, so that the wastewater can be diluted only by times of clear water); although the investment and the occupied area of the successive chemical precipitation method are smaller than those of the A/O method, the consumption of the medicament is too large, and the ratio of N: p: the ratio of Mg is 1: 1.1-1.2, the cost of the treatment agent is too high, and the effluent can not reach the discharge standard required by the state.

SUMMERY OF THE UTILITY MODEL

To the problems existing in the prior art, the utility model provides a high ammonia nitrogen wastewater treatment system.

The technical scheme of the utility model is that:

the high ammonia nitrogen wastewater treatment system comprises an aeration stripping device, a water inlet device, an ammonia absorption box, an acid adjusting tank, an aerobic tank and an anoxic tank, wherein the water inlet device and the ammonia absorption box are respectively arranged at two sides of the aeration stripping device, and sewage can be sequentially subjected to the aeration stripping device, the acid adjusting tank, the aerobic tank and the anoxic tank to remove ammonia nitrogen toxicants in the sewage.

Preferably, the water inlet device comprises a water inlet pump, a water inlet pipe and a spray header, the water inlet pipe is installed in the aeration stripping device and connected with the water inlet pump, and the spray header is installed on the water inlet pipe.

Preferably, the side wall of the aeration stripping device is also provided with an induced draft fan for introducing air into the aeration stripping device.

Preferably, a stirrer is further installed in the acid adjusting tank.

Preferably, a flow pushing device is further installed in the anoxic tank.

Adopt the technical scheme of the utility model, following beneficial effect has:

1. the cost and investment cost are reduced;

2. the whole system runs stably, and the biochemical operation controllability is high;

3. the running cost is low, and the by-product can be retrieved and sold, reduces mud output.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, the utility model provides a high ammonia nitrogen effluent disposal system, blow off device 1, water installations 2, ammonia absorption tank 3, transfer sour pond 4, good oxygen pond 5 and oxygen deficiency pond 6 including the aeration, water installations 2 and ammonia absorption tank 3 are installed respectively in the both sides that the aeration blows off device 1, and sewage loops through the aeration and blows off device 1, transfers sour pond 4, good oxygen pond 5 and oxygen deficiency pond 6 can get rid of the ammonia nitrogen toxicant in the sewage. Preferably, the aeration stripping device comprises a tower-type stripping main body, a water outlet pipe and a gas outlet pipe, hollow polyhedral ball fillers are placed in the tower-type stripping main body, the induced draft fan and the water inlet device are used for feeding water and air into the tower-type stripping main body, the air and the wastewater to be treated are simultaneously introduced into stripping main body equipment, so that gas and liquid are fully contacted in a reaction area, and the generated gas enters the ammonia absorption tank through the gas outlet pipe; the sewage after reaction enters an acid adjusting pool through a water outlet pipe; the tower type air stripping main body is also provided with a visual window, so that observation is convenient.

The water inlet device 2 comprises a water inlet pump 201, a water inlet pipe 202 and a spray head 203, wherein the water inlet pipe 202 is arranged in the aeration stripping device 1 and is connected with the water inlet pump 201, and the spray head 203 is arranged on the water inlet pipe. Preferably, the water inlet device comprises a plurality of water inlet pipes and a spray device, and the water inlet pipes are uniformly distributed in the tower type air stripping main body.

And the side wall of the aeration stripping device 1 is also provided with an induced draft fan 7 for introducing air into the aeration stripping device.

And a stirrer 8 is also arranged in the acid adjusting tank 4.

And a flow impeller 9 is also arranged in the anoxic pond 6.

The utility model discloses the theory of operation does: the utility model discloses a high ammonia-nitrogen concentration effluent disposal system mainly used handles low water content high ammonia-nitrogen concentration waste water, and the reaction principle of its each process is:

aeration stripping device: the stripping method is a physical chemical deamination technology, has the advantages of simple process, easy operation and the like, and generally uses air for stripping at normal temperature. First step of adding base to NH₄ ⁺Conversion to NH₃Form, only NH₃The morphology has the potential to migrate from water into the gas phase; the second step promotes ammonia sewage into the stripping tower, and sewage and hollow polyhedral ball filler fully contact, blow off with the air adverse current, make ammonia escape from aqueous, absorb with the ammonia absorption box, and the by-product of production can be retrieved and sold etc.:

NH₄ ⁺+OH^-→NH₃+H₂O

in the process, air and wastewater to be treated are simultaneously introduced into the air stripping equipment, so that gas and liquid are fully contacted in a reaction area, gas and volatile solute dissolved in water enter a liquid stagnant film through a liquid-phase main body and then transfer to a gas phase through a gas-liquid contact interface, thereby achieving the purpose of removing pollutants. The hollow polyhedral ball filler is arranged in the device, a water-gas contact surface is increased by utilizing a double-membrane theory, the treatment effect is enhanced, and the hollow polyhedral ball is used as the filler with excellent mass transfer performance and has the characteristics of large flux and small resistance.

Acid adjusting section: the wastewater after stripping is added with acid to adjust the PH, and the effluent after passing through the aerobic section flows back to the acid adjusting section, so that the adjustment of a system is fully utilized, and the use of medicaments is reduced.

Aerobic stage/anoxic stage: the O/A process is characterized in that a front-stage aerobic section and a rear-stage anoxic section are connected in series, the DO of the A section is not more than 0.2mg/L, and the DO of the O section is 2-4 mg/L. Because the effluent of the stripping tower needs to be adjusted with acid, in order to reduce the dosage of acid medicament, the aerobic section can consume alkalinity and reduce PH, and the aerobic section can tolerate the characteristic of high PH range and is placed at the front end, and the aerobic effluent has sufficient nitrate nitrogen and enters the anoxic section, so that the power and the use of a reflux pump can be reduced, and the raw water can surpass the carbon source required by the anoxic section. The specific principle is as follows:

under the condition of sufficient oxygen supply, NH is nitrified by autotrophic bacteria in aerobic section₃-N(NH₄ ⁺) Oxidation to NO₃ ^-Flowing to anoxic tank, under anoxic condition, denitrifying by heterotrophic bacteria to convert NO₃ ^-Reduced to molecular nitrogen (N)₂) C, N, O, the ecological cycle is completed, and the sewage harmless treatment is realized.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. The utility model provides a high ammonia-nitrogen concentration effluent disposal system which characterized in that: the device comprises an aeration stripping device, a water inlet device, an ammonia absorption box, an acid adjusting tank, an aerobic tank and an anoxic tank, wherein the water inlet device and the ammonia absorption box are respectively arranged at two sides of the aeration stripping device, and the sewage can remove ammonia nitrogen toxicants in the sewage through the aeration stripping device, the acid adjusting tank, the aerobic tank and the anoxic tank in sequence.

2. The high ammonia nitrogen wastewater treatment system of claim 1, characterized in that: the water inlet device comprises a water inlet pump, a water inlet pipe and a spray head, the water inlet pipe is arranged in the aeration stripping device and is connected with the water inlet pump, and the spray head is arranged on the water inlet pipe.

3. The high ammonia nitrogen wastewater treatment system of claim 1, characterized in that: and the side wall of the aeration stripping device is also provided with an induced draft fan for introducing air into the aeration stripping device.

4. The high ammonia nitrogen wastewater treatment system of claim 1, characterized in that: and a stirrer is also arranged in the acid regulating tank.

5. The high ammonia nitrogen wastewater treatment system of claim 1, characterized in that: and a flow impeller is also arranged in the anoxic tank.