CN2737778Y - Efficient deaminizating and denitrificating tower - Google Patents
Efficient deaminizating and denitrificating tower Download PDFInfo
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- CN2737778Y CN2737778Y CN 200420091999 CN200420091999U CN2737778Y CN 2737778 Y CN2737778 Y CN 2737778Y CN 200420091999 CN200420091999 CN 200420091999 CN 200420091999 U CN200420091999 U CN 200420091999U CN 2737778 Y CN2737778 Y CN 2737778Y
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- ammonia nitrogen
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- tower body
- waste water
- inlet pipe
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Abstract
The utility model relates to an efficient deaminizating and denitrificating tower for processing the industrial ammonia nitrogen wastewater, comprising a tower body, a wastewater inlet pipe fixedly arranged on the tower body, a treated water outlet pipe, an air inlet pipe and an exhaust stack. The tower body is orderly provided with a liquid distributing pipe, a demister, a column tray and an air distributor from top to bottom; the liquid distributing pipe is connected with the wastewater inlet pipe; the air distributor is connected with the air inlet pipe; the treated water outlet pipe is arranged on the bottom seal head of the tower body; the exhaust stack is arranged on a top seal head. The efficient deaminizating and denitrificating tower of the utility model can make the ammonia nitrogen wastewater whose concentration is larger than 5000mg/l eliminated to the state standard of effluent discharge and is principally used for processing the coking ammonia nitrogen wastewater, in addition being used for processing other industrial discharging ammonia nitrogen wastewater.
Description
Affiliated technical field
The utility model relates to a kind of treatment facility of trade effluent, specifically relates to a kind of tower of handling industrial ammonia nitrogen waste water.
Background technology
Nitrogen is the nutritive ingredient in the water body, but when ammonia nitrogen concentration increases in the water, just can cause the eutrophy contact scar of water body, its consequence is the mad growth of hydrobiont, and dead back is consumed a large amount of oxygen by microbiological degradation, thereby makes the water body severe depletion of oxygen, cause the hydrobiont mass mortality, putrid dead body causes a large amount of breedings of anerobe again, finally makes water body muddiness, stench, causes serious water pollution.Ammonia-nitrogen content can not surpass 25mg/L in the national regulation waste discharge.
Enterprises such as coking, chemical fertilizer, oil refining, chemical industry are the discharging rich anies influential family of high-concentration ammonia nitrogenous wastewater, wherein the coking ammonia nitrogen waste water is the waste water that produces in high temperature carbonization, gas purification and the Chemicals treating process by coal, mainly contain pollutents such as ammonia nitrogen, volatile phenol, prussiate, tar, COD, complicated component, the Pollutant levels height, be difficult to biochemical degradation, hazardness is big.Particularly ammonia nitrogen wherein is difficult to remove up to standard especially, becomes a crucial difficult problem of administering coking chemical waste water.
For many years, method for treating ammonia-nitrogen wastewater is carried out a large amount of research and development both at home and abroad, constantly sought the new way of removal of ammonia and nitrogen.Up to now, developed such as multiple treating methods such as nitration denitrification method, blow-off method, ion exchange method, break point chlorinations.Though method for treating ammonia-nitrogen wastewater is a lot, but all exist the shortcoming that initial cost is big, running cost is high, treatment capacity is little, the ammonia nitrogen removal index is difficult to reach the emission standard of national GB 8978-1996 " integrated wastewater discharge standard " regulation, and (the primary standard ammonia nitrogen is less than 15mg/L, the secondary standard ammonia nitrogen is less than 25mg/L), lack effective way especially for the ammonia nitrogen waste water of high density (greater than 5000mg/L).
CN1367147A discloses a kind for the treatment of method of high-concentration ammonia nitrogenous wastewater, be in waste water, to add alkaline compoundization agent unslaked lime and calcium peroxide and sodium hydroxide, Sodium peroxoborate and denitrfying agent successively, carry out aeration behind the stirring reaction, add flocculation agent at last, sedimentation under the effect of flocculation agent, separation.This denitrfying agent can be used to handle the following high-concentration ammonia nitrogenous wastewater of 6000mg/L.
The above-mentioned denitrfying agent that we use the contriver to provide has carried out lab scale, proof can be removed to trace with the ammonia nitrogen component in the high density coking ammonia nitrogen waste water really, and other pollutent in the water removed to greatest extent, handle the every index of back discharge water and reach country-level or secondary discharge standard.
Further performance history has but run into exceptional hardship, ammonia nitrogen removal need carry out abundant aeration, yet, above-mentioned denitrfying agent can produce a large amount of foams when aeration, these foams cover the waste water surface thickly, and reaction product can't in time be removed, and chemical reaction can't carry out thoroughly, not only have a strong impact on denitrification effect, also make wastewater treatment process be difficult to normal running.In addition, in the treating processes of waste water, also need the sufficiently long residence time, and back-mixing can not occur, otherwise the quality of water outlet can't guarantee in the retention period.Test the various wastewater treatment facility through us, all do not reached the test effect of lab scale far away, can't the scale amplification carry out industrial applications.
Summary of the invention
The purpose of this utility model is at the use properties of above-mentioned denitrfying agent and reaction characteristics, designs a kind of high performance tower for picking off ammonia nitrogen that is suitable for this denitrfying agent, so that high-concentration ammonia nitrogenous wastewater once is removed to emission standard.
Ammonia nitrogen removal tower of the present utility model comprises tower body and the waste water inlet pipe, treating water outlet pipe, air feed tube and the bleeder that are fixedly mounted on the tower body, be furnished with liquid distribution pipe, scum dredger, column plate and air-distributor in the tower body from top to bottom successively, liquid distribution pipe links to each other with the waste water inlet pipe, and air-distributor connects air feed tube.
Wherein the diameter of tower body can be according to the decision of the size of wastewater treatment capacity, but should satisfy the condition of the ratio H of tower body height and diameter: D=5～10: 1, and the material of tower body can be carbon steel, stainless steel, clad steel plate or carbon steel line with rubber etc.
Ammonia nitrogen removal tower of the present utility model adopts the plate column plank frame.The structure design of multilayer column plate has taken into full account the aeration characteristics of denitrfying agent, and gas-liquid mass transfer and aerated reaction process are strengthened, and has solved a series of problems such as foam, aerated reaction and product separation, makes the equipment can normal running and operation.On this basis, can adopt column plate such as various ways such as bubble-cap, float valve, sieve plate, ligulate, screens.
The utility model is connected with air-distributor on air feed tube at the bottom of the tower, to guarantee air being evenly distributed on tower section, simultaneously, the utility model is not provided with aeration head yet in tower, but utilizes column plate that gas is repeatedly distributed.Different with other tower, waste water inlet pipe of the present utility model and liquid distribution pipe have been arranged on the top of scum dredger, and such being provided with can prevent effectively that foam from spilling into outside the tower, make the equipment can normal running and operation.
The treating water outlet pipe that is used for emission treatment water is installed in the bottom (head) of tower body, and the bleeder of discharging waste gas is installed on the tower body cover head, and the diameter of bleeder and tower body diameter should satisfy the proportionlity of d: D=1～2: 5.
Ammonia nitrogen removal tower of the present utility model is mainly used in handles the coking ammonia nitrogen waste water, also can be used for the processing of other industrial discharge ammonia nitrogen waste water in addition.
Principle of work of the present utility model is: the coking ammonia nitrogen waste water that adds denitrfying agent and regulate pH value enters in the tower from cat head waste water inlet pipe, after liquid distribution pipe distributes, pass through scum dredger, drop on the column plate, behind repeatedly gas-liquid mass transfer and aerated reaction, last treating water flows out outside the tower from tower bottom reason water outlet pipe; Air is blasted in the tower from air feed tube by gas blower, distributes through air-distributor, upwards enters the column plate layer, pass through scum dredger and liquid distribution pipe again after, outside the cat head bleeder is discharged tower.In said process, ammonia nitrogen waste water fully carries out chemical reaction and aeration in tray surfaces, ammonium salt in the waste water is changed into free ammonia, countercurrent flow by gas-liquid, air constantly contacts and abundant gas-liquid mass transfer in tray surfaces with waste water, ammonia nitrogen in the waste water constantly is discharged in the gas, and ammonia nitrogen removes fully in the realization waste water.
Ammonia nitrogen removal tower of the present utility model can be with greater than the disposable trace that is removed to of the high-concentration ammonia nitrogenous wastewater of 5000mg/L, efficient reaches 100%, reach discharging standards fully, simultaneously, can also remove pollution substances such as phenol, cyanogen, COD to some extent, the efficient that removes phenol, cyanogen is about 60%, and the efficient that removes COD is greater than 50%.Behind the ammonia nitrogen removal, help the follow-up biochemical treatment of waste water, effective assurance is provided for water outlet is up to standard comprehensively.
Ammonia nitrogen removal tower of the present utility model is simple to operate, and working cost is low, and maintenance maintenance is convenient, and the scale of being convenient to carry out is amplified, and equipment is concentrated, saves space.Ammonia nitrogen removal tower of the present utility model has greatly been strengthened the aeration rate on the column plate when total vapour-liquid ratio reduces, both reduced power consumption and running cost, has improved treatment capacity again.Investigate through trial run after a while, stable equipment operation, reliable, the water outlet data can not rise and fall sharply and quickly, the ammonia nitrogen waste water of handling different concns all there is very strong adaptability, overcome the unfavorable factor of other type equipment, greatly having improved the operability of equipment, is a kind of brand-new coking ammonia nitrogen sewage treatment equipment.
Description of drawings
Fig. 1 is the structural representation of the utility model ammonia nitrogen removal tower.
Embodiment
The structure of ammonia nitrogen removal tower as shown in Figure 1, the tower body of being made by carbon steel 11 is fixedly connected on the bed-plate 6, upper and lower respectively with 8 sealings of cover head 14 and bottom (head), on bottom (head) 8, be installed with treating water outlet pipe 7 and stretch out outside the tower, cover head 14 is provided with bleeder 1 and leads in the atmosphere.
Centre in tower body 11 is provided with the board-like column plate 4 of multi-deck screen, and the downtake 3 of configuration on every layer of column plate 4, the below of column plate 4 is provided with air-distributor 5, and be fastened on air feed tube 10 on the tower body 11, after liquid distribution pipe 13 is fastened on waste water inlet pipe 2 on the tower body 11 equally, be arranged on cover head 14 belows in the tower body 11, scum dredger 12 is arranged between liquid distribution pipe 13 and the column plate 4, in the bottom of tower body 11 liquidometer 9 is installed also.
The coking ammonia nitrogen waste water that adds denitrfying agent and regulate pH value is fed in the towers from cat head waste water inlet pipe 2, distribute by liquid distribution pipe 13, and after passing scum dredger 12, drop on the column plate 4, and fall into down on one deck column plate 4 through downtake 3; Air is blasted in the tower from air feed tube 10 by gas blower, distributes through air-distributor 5, upwards enters the column plate layer, and the vapour-liquid ratio of feeding is less than 500.By the countercurrent flow of gas-liquid, air constantly contacts in tray surfaces with waste water, fully carries out chemical reaction and aeration, and the gas-liquid mass transfer through repeated multiple times constantly is discharged in the gas ammonia nitrogen in the waste water, and ammonia nitrogen removes fully in the realization waste water.The treating water outlet pipe for the treatment of water by all column plate layers at the bottom of the tower flows out outside the tower at last, after the gas that passes the column plate layer also passes through scum dredger 12 and liquid distribution pipe 13, discharges outside the tower from cat head bleeder 1.
Equipment of the present utility model is directly used in the residue ammonia nitrogen waste water before handling ammonia still process in Dong Sheng coke-oven plant, Shanxi province Taiyuan city Qingxu, remained ammonia-nitrogen content in the ammonia nitrogen waste water at that time up to 5832.42mg/L, it is once passed through the ammonia nitrogen removal tower, water outlet ammonia nitrogen index drops to 11.84mg/L, has reached national grade one discharge standard.
Claims (4)
1, a kind of ammonia nitrogen removal tower, comprise tower body and the waste water inlet pipe, treating water outlet pipe, air feed tube and the bleeder that are fixedly mounted on the tower body, it is characterized in that in tower body, being equipped with the column plate of multilayered structure, the column plate top is equipped with scum dredger, and liquid distribution pipe links to each other with the waste water inlet pipe, is installed in the top of scum dredger, air-distributor is connected with air feed tube, be installed in the below of column plate, the treating water outlet pipe is installed on the bottom (head) of tower body, and bleeder is installed on the cover head of tower body.
2, ammonia nitrogen removal tower according to claim 1 is characterized in that described column plate is a kind of in bubble-cap, float valve, sieve plate, ligulate, the screen.
3, ammonia nitrogen removal tower according to claim 1 is characterized in that the ratio H of tower body height and diameter: D=5～10: 1.
4, ammonia nitrogen removal tower according to claim 1 is characterized in that the ratio d of bleeder diameter and tower body diameter: D=1～2: 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420091999 CN2737778Y (en) | 2004-10-26 | 2004-10-26 | Efficient deaminizating and denitrificating tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420091999 CN2737778Y (en) | 2004-10-26 | 2004-10-26 | Efficient deaminizating and denitrificating tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2737778Y true CN2737778Y (en) | 2005-11-02 |
Family
ID=35347690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420091999 Expired - Fee Related CN2737778Y (en) | 2004-10-26 | 2004-10-26 | Efficient deaminizating and denitrificating tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2737778Y (en) |
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2004
- 2004-10-26 CN CN 200420091999 patent/CN2737778Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |