CN202297252U - Low-energy-consumption integrated nitrogen and phosphorus recycling device - Google Patents
Low-energy-consumption integrated nitrogen and phosphorus recycling device Download PDFInfo
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- CN202297252U CN202297252U CN2011203251145U CN201120325114U CN202297252U CN 202297252 U CN202297252 U CN 202297252U CN 2011203251145 U CN2011203251145 U CN 2011203251145U CN 201120325114 U CN201120325114 U CN 201120325114U CN 202297252 U CN202297252 U CN 202297252U
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Abstract
The utility model relates to a low-energy-consumption integrated nitrogen and phosphorus recycling device comprising a vertical tank body, wherein the bottom of the vertical tank body is provided with a water inlet jet device, a chemical dosing device and a water inlet pipe which is connected with the water inlet jet device, and one end of a clear water outlet pipe is communicated with the top of the vertical tank body. The low-energy-consumption integrated nitrogen and phosphorus recycling device is characterized in that the middle lower part of the interior of the vertical tank body is provided with a fluidization region, guanite seed crystal particles are arranged in the fluidization region, a diversion mixer is arranged at the center of the fluidization region, a tank body space below the diversion mixer is a water distribution region communicated with the water inlet jet device, hoisting equipment is arranged at the top of the vertical tank body, and the diversion mixer is arranged on the output shaft of the hoisting equipment. The low-energy-consumption integrated nitrogen and phosphorus recycling device provided by the utility model has the advantages that a system mass transfer process is sped up, the operating cost and the operating difficulty are greatly reduced, and the nitrogen phosphorus interception efficiency and the recycling effect are improved; the engineering design is simple and convenient, the construction installation period is short; no external backflow is required, internal backflow energy consumption is low, the frequency is variable and the speed can be regulated, a magnesium source added from the outside is easy to control, and the content of magnesium in effluent is low.
Description
Technical field
The utility model relates to a kind of integrated nitrogen and phosphorus recovery device with low energy consumption, is used for the nitrogen phosphoric is handled and reclaimed to nitrogenous phosphorus waste water, belongs to nitrogenous phosphorus wastewater treatment equipment technical field.
Background technology
Phosphorus is a kind of most valuable and rare Nonrenewable resources.It is predicted that global phosphorus ore reserves were only enough kept about 100 years, phosphorus will become the limiting factor of human and land vital movement.China's phosphate rock resource is abundant, and proven reserve occupy the 3rd in the world.But compare with other country, deposit the gap of following several respects at aspects such as ore quality, washability and Rock Phosphate (72Min BPL) exploitations: the firstth, rich ore is few, and middle low grade ore is many.In explored phosphorus ore reserves, P2O5 accounts for 8% of total reserves, and mainly concentrates on Yunnan Province and Guizhou Province greater than only 1,100,000,000 tons in 30% rich ore.The secondth, difficult ore dressing is many, and it is few to be prone to ore dressing.In explored reserves, the appositional pattern phosphorite accounts for 85% of China's total reserves, and major part is middle low grade ore, and the exploitation difficulty is quite big.Therefore, the real amount usable of China's phosphate rock resource is not abundant, and Ministry of Land and Resources classifies phosphorus ore as 2010 years can not guarantee one of mineral of demand.
What form sharp contrast with it is: the various phosphorous consumer's goods are after consumption; Most of phosphoric gets in the environment by all means; Wherein residual agricultural land soil about 4,990,000 tons/every year; Residual natural soil about 2,060,000 tons/every year, get into water body environment about 1,130,000 tons/every year directly, indirectly.Simultaneously, water body is more and more obvious owing to the excessive eutrophication phenomenon that causes of phosphorus element-containing, data presentation; About 1,130,000 tons (8,460,000 tons in signature ore deposits of phosphoric that China in 2002 gets into water body by all means; Be higher than national then phosphorus production desired raw material Rock Phosphate (72Min BPL) total amount), wherein 11.4% derive from phosphorus-containing detergent, 21.5% derives from widespread pollution from the overuse of fertilizers and pesticides in rural area; 54.6% enters water body by people and fowl and animal excrement causes, and all the other 12.5% derive from industrial pollution.Therefore, the sustainable use problem of phosphorus gravely is placed in front of us, and each link from produce, live realizes that the artificial recycling of phosphorus has become the managerial international hot research problem of resource and environment.
The phosphorus 80% of occurring in nature with regard to WWT, becomes traditional modern recovery that is treated to from the discharging of sewage, particularly from sewage, realizes the problem that phosphorus reclaims more and more obtaining the great attention of countries in the world scholar and government.Swedish government clearly stipulates, the medium-term goal before 2015 is from sewage, to reclaim to be no less than 60% phosphorus and to be used to produce land used, wherein is no less than 50% and is used for the arable land.
Utilize modern technique to realize that it is a large amount of approach that run off of an effective and feasible prevention phosphorus that waste water treatment plant's phosphorus reclaims, and meets the idea of development of recycling economy.During at present the waste water treatment plant of states such as Japan, Italy, Britain, Australia has begun, small-scale phosphorus reclaims, mostly recovery method is to the collected digested sludge of being rich in phosphorus, nitrogen, mud concentrated supernatant and dewaters to filtrate etc. to add Mg (OH)
2, add NaOH again or adopt CO
2Blow-off method is regulated the pH value, and the finished product are struvite.Struvite contains two kinds of nutritive elements of nitrogen phosphorus, can be directly as slowly discharging phosphate fertilizer or in fertiliser prodn, being utilized.And the struvite crystal seed be a kind of through simple technique with regard to fertile product, its molecular formula is MgNH
4PO
46H
2O is a kind of white crystal that is insoluble in water.Under the normal temperature, the solubility product of struvite crystal seed in water is 2.5 * 10
-13, through adding chemical reagent, can make ammonia and phosphoric acid salt in the waste water form struvite, remove when realizing nitrogen and phosphorus pollutants.
It is less relatively that present domestic phosphorus reclaims technical study, and focus mostly in, the lab scale stage, the content of research is lack of depth and range still, does not still have suitability for industrialized production equipment.
Summary of the invention
The purpose of the utility model provides a kind of cost is low, energy consumption is low, efficient is high integrated nitrogen and phosphorus recovery device with low energy consumption to alleviate the nitrogen and phosphorus load of biochemical processing process; Improve the stability and the safety of discharged wastewater met the national standard; Reduction equipment operation energy consumption makes integrated, the intelligent and simplification of operational management.
In order to achieve the above object, the technical scheme of the utility model has provided a kind of integrated nitrogen and phosphorus recovery device with low energy consumption, comprises vertical tank body; Be provided with into water ejector in the bottom of vertical tank body, chemicals dosing plant and water inlet pipe connect the water inlet ejector, and an end of clear water rising pipe is connected with the top of vertical tank body; It is characterized in that be provided with fluidization regions in the intravital middle and lower part of vertical tank, fluidization regions is built-in with the struvite seed particles; Be provided with the water conservancy diversion mixing tank at the center of fluidization regions; The tank body space of water conservancy diversion mixing tank below is provided with lift technique for connecting the water distribution zone of water inlet ejector at the top of vertical tank body, the water conservancy diversion mixing tank places on the output shaft of lift technique.
Further, said lift technique is that lift technique or air-lift unit equipment are stirred in frequency conversion.
Further, said chemicals dosing plant adds pipe for adding the magnesium source.
Further, said chemicals dosing plant is for adding alkali source and add pipe and adding the magnesium source and add pipe.
The utility model can realize that return of waste water is than control automatically through the VFC lift technique.Waste water (liquid) and NaOH and MgCl
2Get in the bed body through bottom water conservancy diversion mixing tank synchronously, whole device can change through system pH, realizes Automatic Dosing adjustment pH.In the water conservancy diversion mixing tank of center under the intensive mixing stirring action; Ammonia nitrogen in the waste water and soluble phosphate and add the magnesium source and carry out chemical precipitation reaction; Form the struvite layer at the struvite seed surface; Macrobead struvite layer comes off under the mixed solution rubbing effect in the struvite layer in the water conservancy diversion mixing tank outside descends the district, reach fixed nitrogen phosphorus and with the isolating purpose of treating water.
The utility model adds the struvite crystal seed and helps the sedimentary formation of struvite, and ammonia nitrogen, phosphoric acid salt and mg ion carry out flocculation precipitation reaction and continue to produce at seed surface; Along with thickening of seed surface struvite film, its unstable increases, and under reactor drum fluidisation state, forms the larger particles precipitate to reactor bottom.The particle diameter of this crystal seed is generally 0.2～1cm, and the less crystal seed of particle diameter is easy to precipitate struvite, particularly for the bigger waste water of concentration.
Simultaneously; Although aerobic treatment, anaerobic biological treatment and physico-chemical processes etc. and various combination process thereof are to the treatment effect of high concentration N-P waste water clearly; But the device that adopts the utility model to provide; To the terminal supernatant of the anaerobism section of existing Waste Water Treatment, sludge digestion liquid supernatant and dehydration filtrating, livestock breeding wastewater, industry high-concentration is nitrogenous or phosphorus-containing wastewater is handled or pre-treatment is more effective; Can alleviate the nitrogen and phosphorus load of subsequent wastewater treatment technology greatly, improve the stability and the safety of nitrogen phosphorus qualified discharge.This device is combined in hybrid reaction, flocculation-deposition and discrete group in the reactor drum, has significantly reduced installation cost and floor space, has realized holding back in a large number and reclaiming of waste water nitrogen phosphorus again.
The concrete advantage applies of the utility model is: 1, this reactor drum combines automatic internal reflux, exogenously added alkali and magnesium source technically at the system uniform distribution and with struvite crystal seed fluidisation; Accelerated the system mass transfer process; Fundamentally solved the crystal growth of traditional struvite recovery system slowly and need add problem such as crystal seed continuously; And prolonged the struvite crystals PT; Macrobead struvite throw out is regularly got rid of simultaneously, reduces running cost and operation easier greatly, improves nitrogen phosphorus and holds back efficient and recovering effect; 2, whole apparatus structure is compact, and level of automation is high; 3, can be according to the fluidisation intensity and the reactor volume of different water treatment amounts and concrete water quality selecting reactor, so engineering design is easy, the construction and installation phase is short; 4, need not external reflux, the internal reflux energy consumption is low, the frequency conversion adjustable speed, and it is easy to control that the outside adds the magnesium source, and Mg content is low in the water outlet.
Description of drawings
The structural representation of a kind of integrated nitrogen and phosphorus recovery device with low energy consumption that Fig. 1 provides for the utility model.
Embodiment
Specify the utility model below in conjunction with embodiment.
Like Fig. 1; A kind of integrated nitrogen and phosphorus recovery device with low energy consumption structural representation for the utility model provides comprises vertical tank body 9, is provided with into water ejector 5 in the bottom of vertical tank body 9; Adding alkali source adds pipe 2, adds that the magnesium source adds pipe 3 and water inlet pipe 1 connects water inlet ejector 5; One end of clear water rising pipe 11 is connected with the top of vertical tank body 9, and the middle and lower part in vertical tank body 9 is provided with fluidization regions 7, and fluidization regions 7 is built-in with the struvite seed particles; Be provided with water conservancy diversion mixing tank 6 at the center of fluidization regions 7; The tank body space of water conservancy diversion mixing tank 6 belows is provided with discharge pipe 10 outside the struvite for connecting the water distribution zone of water inlet ejector 5 in the bottom of vertical tank body 9, outside struvite, be provided with on the discharge pipe 10 by diaphragm valve; Be provided with frequency conversion at the top of vertical tank body 9 and stir lift technique 8, water conservancy diversion mixing tank 6 places frequency conversion to stir on the output shaft of lift technique 8.
It is main that this reactor drum mainly adds with liquid magnesium source, the general magnesium chlorides that adopt more, and alkali lye adopts NaOH solution basically; Also can only add Natural manganese dioxide or Marinco H, and could use after being pre-mixed reaction, also can other form magnesium source dosing methods be set according to the waste water quality characteristics according to practical situation.
The working process of the utility model is: contain inorganic ammonia nitrogen, positive phosphorus waste water after pre-treatment; Through intake pump 4 water inlet, nitrogen, phosphorus mix under the pump high-speed stirring in the water inlet pipe of certain density alkali source and magnesium source entering intake pump 4 simultaneously, magnesium source and water; Get into reactor drum water distribution zone and water distribution uniformity through water inlet ejector 5; Under the promotion of continuously water inlet and mechanical stirring lift technique, get into that water conservancy diversion mixing tank 6 is laggard goes into fluidization regions 7, waste water is after fluidization regions 7 process fluidisation, reaction and the stops of certain hour; Most of return of waste water gets into water conservancy diversion mixing tank 6 through promoting again to reactor bottom.Struvite crystal seed in the fluidization regions 7 rests on fluidization regions 7 all the time through continuous circulation, and the macrobead struvite regularly effluxes simultaneously, and the solid struvite is collected.
For specific high concentration N-P waste water; Can increase the dosage in magnesium source according to its characteristics, in reactor drum, strengthen the volume of fluidization regions 7, water conservancy diversion mixing tank 6 and stir lift technique 8 specifications; Also can reach the ideal effect of expection according to the number of actually operating condition on-off reaction device.
Claims (6)
1. integrated nitrogen and phosphorus recovery device with low energy consumption; Comprise vertical tank body (9), be provided with into water ejector (5) in the bottom of vertical tank body (9), chemicals dosing plant and water inlet pipe (1) connect water inlet ejector (5); One end of clear water rising pipe (11) is connected with the top of vertical tank body (9); It is characterized in that the middle and lower part in vertical tank body (9) is provided with fluidization regions (7), fluidization regions (7) is built-in with the struvite seed particles; Be provided with water conservancy diversion mixing tank (6) at the center of fluidization regions (7); The tank body space of water conservancy diversion mixing tank (6) below is provided with lift technique for connecting the water distribution zone of water inlet ejector (5) at the top of vertical tank body (9), water conservancy diversion mixing tank (6) places on the output shaft of lift technique.
2. a kind of integrated nitrogen and phosphorus recovery device with low energy consumption as claimed in claim 1 is characterized in that, said lift technique is that lift technique (8) or air-lift unit equipment are stirred in frequency conversion.
3. a kind of integrated nitrogen and phosphorus recovery device with low energy consumption as claimed in claim 2 is characterized in that, is provided with discharge pipe outside the struvite (10) in the bottom of said vertical tank body (9).
4. a kind of integrated nitrogen and phosphorus recovery device with low energy consumption as claimed in claim 3 is characterized in that, discharge pipe outside said struvite is provided with by diaphragm valve on (10).
5. like each described a kind of integrated nitrogen and phosphorus recovery device with low energy consumption in the claim 1 to 4, it is characterized in that said chemicals dosing plant adds pipe (3) for adding the magnesium source.
6. like each described a kind of integrated nitrogen and phosphorus recovery device with low energy consumption in the claim 1 to 4, it is characterized in that said chemicals dosing plant adds pipe (3) for adding alkali source and adding pipe (2) and add the magnesium source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203251145U CN202297252U (en) | 2011-09-01 | 2011-09-01 | Low-energy-consumption integrated nitrogen and phosphorus recycling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203251145U CN202297252U (en) | 2011-09-01 | 2011-09-01 | Low-energy-consumption integrated nitrogen and phosphorus recycling device |
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|---|---|
| CN202297252U true CN202297252U (en) | 2012-07-04 |
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ID=46366190
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|---|---|---|---|
| CN2011203251145U Expired - Lifetime CN202297252U (en) | 2011-09-01 | 2011-09-01 | Low-energy-consumption integrated nitrogen and phosphorus recycling device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103288242A (en) * | 2013-06-19 | 2013-09-11 | 陕西省环境科学研究院 | Ammonia nitrogen wastewater treatment method |
| CN103833164A (en) * | 2014-03-17 | 2014-06-04 | 顾建嗣 | Sewage precipitative filter tank |
| CN104828930A (en) * | 2015-04-27 | 2015-08-12 | 重庆市艳阳环保工程有限公司 | Low-energy-consumption multifunctional membrane biological treatment complete equipment |
-
2011
- 2011-09-01 CN CN2011203251145U patent/CN202297252U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103288242A (en) * | 2013-06-19 | 2013-09-11 | 陕西省环境科学研究院 | Ammonia nitrogen wastewater treatment method |
| CN103833164A (en) * | 2014-03-17 | 2014-06-04 | 顾建嗣 | Sewage precipitative filter tank |
| CN103833164B (en) * | 2014-03-17 | 2015-04-22 | 顾建嗣 | Sewage precipitative filter tank |
| CN104828930A (en) * | 2015-04-27 | 2015-08-12 | 重庆市艳阳环保工程有限公司 | Low-energy-consumption multifunctional membrane biological treatment complete equipment |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |