CN108314183A - A kind of operation method of denitrification deep-bed filter system - Google Patents

A kind of operation method of denitrification deep-bed filter system Download PDF

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Publication number
CN108314183A
CN108314183A CN201810204678.XA CN201810204678A CN108314183A CN 108314183 A CN108314183 A CN 108314183A CN 201810204678 A CN201810204678 A CN 201810204678A CN 108314183 A CN108314183 A CN 108314183A
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China
Prior art keywords
filter
backwash
water
bed filter
denitrification
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CN201810204678.XA
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Chinese (zh)
Inventor
薛开泉
杨柳
贾伯林
曹爱辉
卢建波
尤亚建
陈勇华
王伟
张建兵
沈杰
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TAIPINGYANG WATER TREATMENT ENGINEERING Co Ltd
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TAIPINGYANG WATER TREATMENT ENGINEERING Co Ltd
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Priority to CN201810204678.XA priority Critical patent/CN108314183A/en
Publication of CN108314183A publication Critical patent/CN108314183A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/14Maintenance of water treatment installations

Abstract

The present invention discloses a kind of operation method of denitrification deep-bed filter system, and specific steps include:(1)The structure of denitrification deep-bed filter system:Denitrification deep-bed filter system includes a mixed cell;One denitrification filter element;One backwash unit;(2)Filtering;(3)Nitrogen discharges;(4)Backwash.The invention has the advantages that:Filter tank can synchronize removal TN, SS, TP, and stable water outlet is up to standard, will build up the release of the nitrogen in filtering layer in an atmosphere by backwashing flow, the gas for effectively solving to occur during waste water filtering blocks up phenomenon, ensures the less energy consumption of denitrification deep-bed filter;By the lower section gate for adjusting clear water reserviors effluent weir, the liquid level difference of flexibly changing filter tank drop sluice position and clear water reserviors water outlet water level, increase filter head, filter tank anti-shock loading, filter tank overload operation ability, the applicability in filter tank can be promoted, the filter back washing period can effectively be extended, culture and the proliferation for being conducive to denitrifying bacteria, improve the treatment effeciency in filter tank.

Description

A kind of operation method of denitrification deep-bed filter system
Technical field:
The invention belongs to field of waste water treatment, specifically a kind of operation method of denitrification deep-bed filter system.
Background technology:
China came into effect in 1 day July in 2003《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) There is more stringent regulation to sewage disposal plant effluent BOD5, COD, SS, TN, NH3-N, TP and coliform group count.I The sewage treatment plant that state has built up, majority use traditional activated sludge process, ageing equipment to be faced with to carry marking to be transformed at present and ask Topic.
Currently, to implement《The People's Republic of China's Law on the Prevention and Treatment of Water Pollution》, reinforce to urban wastewater treatment firm construction and fortune Capable management, improves cities and towns quality of water environment, and environmental protection department's common demands at different levels sewage treatment plant of China wants strict implement 《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002)Level-one A standards, it is desirable that urban wastewater treatment firm is discharged When being discharged into country and saving the determining closing such as major river valley and lake, reservoir, semiclosed waters, the A standards of primary standard are executed.This Mean the implementation of level-one A standards in China, the especially major river valleys such as Taihu Lake, Chaohu, Dian Chi to a certain extent Urban wastewater treatment firm.Therefore built sewage treatment plant must will carry out upgrading to dephosphorization denitrogenation technology, wherein Maximum difficulty is exactly that TN indexs carry mark.The existing technique of sewage treatment plant is difficult the requirement for meeting TN and proposing mark upgrading, it is necessary to Using new strengthened denitrification technology.
Normal activity sludge processes have the organic concentration of water inlet and require when carrying out, unsuitable excessively high, and are aerated The volume in pond is big, and area occupied is wide, and the phenomenon that dissolving oxygen excess is susceptible in aeration tank, influences wastewater treatment efficiency, denitrogenation Phosphor-removing effect is poor, therefore after being ordinary activated sludge technique using deep-bed filter, collects physical filtering and biomembrane is oxidized to one The sewage treatment process of body is removed the SS pollutants based on activated sludge in a manner of physical filtering, while established preferably Biotic environment completes biological denitrification denitrogenation, can also synchronize and carry out tiny flocculation chemical dephosphorization.Wherein preferably culture and accumulation Denitrifying bacteria(Especially 15 DEG C or so of low temperature), nitric efficiency is improved, preferably playing the advantage of denitrification deep-bed filter is Research and develop the difficult point of denitrification deep-bed filter system.The operation method of existing denitrification deep-bed filter system has the disadvantage that:If Meter Inlet and outlet water liquid level is unadjustable, and anti-shock loading is low, when SS of intaking is fluctuated or water is promoted, can cause backwashing period The phenomenon that shortening or frequently backwashing, this is very unfavorable to the growth of microorganism(Especially in the system cultivation stage), especially exist 15 DEG C or so of winter low temperature is more difficult to improve treatment effeciency and realizes that the removal of TN is up to standard.Therefore, exploitation one more optimizes It is particularly important to create environment preferably for microorganism growth for the operation method of denitrification deep-bed filter system.
Invention content:
It is above the purpose of the invention is to overcome the shortcomings of, a kind of operation method of denitrification deep-bed filter system is provided, It can go out in clear water reserviors in the case of not large-scale damage, change original pond body when propose mark transformation to sewage treatment plant Gate is arranged in mill weir, and the adjusting to filter tank water inlet and the liquid level difference of clear water reserviors water outlet is realized by adjusting the high flexible of gate. When water inlet SS loads increase, water load increases or front process adds PAM when filter tank, make denitrification deep-bed filter water inlet wadding Body increases, and the viscosity of water body increases, and can change filter tank water inlet and clear water reserviors water outlet by adjusting clear water reserviors effluent weir tail gates Liquid level difference ensures the filtering of filter tank continuous-stable, improves the anti-shock loading in filter tank, promotes filter tank overload operation ability, have Effect extends backwashing period, is conducive to denitrifying bacteria culture and proliferation, increases filter tank treatment effeciency, ensures the SS, total of water outlet Nitrogen, total phosphorus meet level-one emission standard A.Meet existing sewage treatment plant carry mark transformation when, especially in front and back end, technique can not In the case of change, the applicability of denitrification deep-bed filter is promoted, the promotion and application of denitrification deep-bed filter are conducive to.
The purpose of the present invention is achieved through the following technical solutions:A kind of operation method of denitrification deep-bed filter system, Specific steps include
(1)The structure of denitrification deep-bed filter system:Denitrification deep-bed filter system includes
One mixed cell, mixed cell include that mixing pit, mixing pit water inlet pipe, carbon source supply device, medicament addition device, mixing are stirred Mix device, the downside of mixing pit water inlet pipe and mixing pit connects, carbon source supply device, medicament addition device and mixing agitator by The inside of mixing pit is stretched under;
One denitrification filter element, denitrification filter element include intake total canal, filter tank both sides inlet channel, drop weir, denitrification One end of deep-bed filter, total canal of intaking is connect with mixing pit, and the other end is connect with filter tank both sides inlet channel, filter tank both sides inlet channel By dropping, weir is connect with denitrification deep-bed filter, and drop weir is placed in the upside of denitrification deep-bed filter, denitrification deep-bed filter The supporting layer for being internally provided with cross-distribution and the filtering layer being placed in denitrification deep-bed filter;
One backwash unit, backwash unit includes gas flushing group and water flushing group;Gas flushing group include backwash wind turbine with And backwash gas pipeline, one end of backwash gas pipeline are connect with backwash wind turbine, the other end and denitrification deep-bed filter Lower end connection;Water flushing group includes clear water reserviors and discharge of wastewater pond, the upside of clear water reserviors under denitrification deep-bed filter Water inlet pipe is equipped between end, the upside of clear water reserviors is equipped with outlet pipe, and water inlet pipe is equipped with inlet valve, water outlet close to the position of clear water reserviors Pipe is equipped with outlet valve, and backwash pump is equipped in clear water reserviors, which is connect by backwashing branch pipe with water inlet pipe, It backwashes branch pipe and is equipped with back flush valves, discharge of wastewater pond is connect with total canal of intaking by backwash drainpipe, backwash row Water pipe is equipped with backwash water discharging valve, and clear water reserviors are equipped with effluent weir, and the lower section of effluent weir is equipped with gate, in discharge of wastewater pond Equipped with waste water lifting pump, which is connected with wastewater discharge pipe road and the outlet end on the wastewater discharge pipe road and extends to outside Portion;
(2)Filtering:Sewage is passed through in mixing pit, and opens carbon source throwing device, medicament addition device, and carbon is put into mixing pit Source and PAC medicaments, the hybrid reaction in mixing pit are each led into after hybrid reaction into Shui Zongqu, filter tank both sides inlet channel, warp Drop weir enters denitrification deep-bed filter, is filtered by filtering layer, filtered water enters clear water reserviors;
(3)Nitrogen discharges:Filter tank both sides inlet channel, inlet valve, outlet valve are closed, backwash pump is started, opens backwash valve Door and backwash water discharging valve, backwash 1min-5min, and the nitrogen in filtering layer is discharged into the atmosphere by backwashing flow;It closes Backwash pump, back flush valves and backwash water discharging valve are closed, filter tank both sides inlet channel, inlet valve, outlet valve is opened, restores The operation of denitrification deep-bed filter;
(4)Backwash:First, air purge is carried out, water inlet is stopped, the liquid level in denitrification deep-bed filter reduces at this time, closes filter tank Both sides inlet channel, inlet valve, outlet valve open the backwash water discharging valve on backwash drainpipe, start backwash wind turbine, empty Gas backwashes 1min-5min;Secondly, it carries out air water to backwash simultaneously, opens back flush valves and backwash pump, air water are same When backwash 10min-18min;Again, it is washed, closes backwash wind turbine, continued water and individually backwash 5min-10min, The residual air and residual backwashing wastewater, backwashing wastewater removed in denitrification deep-bed filter enters in discharge of wastewater pond; Finally, back flush valves, backwash pump, backwash water discharging valve are closed, filter tank both sides inlet channel, inlet valve, water outlet are opened Valve restores the operation of denitrification deep-bed filter.
Further improvement of the present invention is:Step(4)The backwashing wastewater generated in backwash process is carried by waste water It rises pump and is back to progress circular treatment at front-end process grid.
Further improvement of the present invention is:Step(1)In the structure of denitrification deep-bed filter system, the filter of denitrification depth bed The liquid level difference ranging from 3m-3.6m of the water inlet water level in pond and the effluent weir water level of clear water reserviors.
Further improvement of the present invention is:Step(1)In the structure of denitrification deep-bed filter system, set in total canal of intaking There are open-channel meter, deflector.
Further improvement of the present invention is:Step(1)In the structure of denitrification deep-bed filter system, the filter of denitrification depth bed Pond uses water-gas distribution filter block, and the material of water-gas distribution filter block is high density polyethylene (HDPE) material.
Further improvement of the present invention is:Step(1)In the structure of denitrification deep-bed filter system, thickness of filter bed is 1.8m-2.2m, filtering layer is by grain size in 2-4mm, proportion >=2.6g/cm3, sphericity 0.8-0.9, the natural sea sand of sour solubility≤3% Composition, porosity 0.2-0.5, supporting layer are made of 3-19mm cobblestones, and the thickness of supporting layer is 400mm-600mm.
Further improvement of the present invention is:Step(1)In the structure of denitrification deep-bed filter system, medicament addition device Including dissolving case, liquid reserve tank, blender, metering pump a.
Further improvement of the present invention is:Step(1)In the structure of denitrification deep-bed filter system, carbon source throwing device Including carbon source fluid reservoir, metering pump b, discharging pump, on-line dilution device and full-automatic feeder.
Further improvement of the present invention is:Step(1)In the structure of denitrification deep-bed filter system, the filter of denitrification depth bed The depth in pond is 5.8m-6.6m.
Compared with the prior art, the present invention has the following advantages:
1, a kind of operation process of denitrification deep-bed filter of the present invention includes structure, filtering, the nitrogen of denitrification deep-bed filter system Gas discharges and four steps of backwash, and filtering layer filtering of the sewage through denitrification deep-bed filter retains a large amount of SS, can synchronize The step for except TN, SS, TP, stable water outlet is up to standard, and wherein nitrogen discharges is will build up in filtering layer by backwashing flow Nitrogen discharges in an atmosphere, recyclable to release nitrogen, and the gas for effectively solving to occur during waste water filtering blocks up phenomenon, keeps denitrification deep The less energy consumption in bed filter tank.
2, denitrification deep-bed filter includes mixed cell, denitrification filter element and backwashes unit, mixed cell In mixing pit, waste water is quickly mixed with the carbon source and medicament added, and is uniformly mixed by mixing agitator, then passes through water inlet Total canal and filter tank both sides inlet channel enter denitrification deep-bed filter and are filtered, and the clear water reserviors for backwashing unit are equipped with water outlet Weir, the lower section of effluent weir are equipped with gate, by adjusting the height of gate, can flexible modulation denitrification deep-bed filter water inlet water level with And the liquid level difference of clear water reserviors water outlet water level.
3, when water inlet SS loads in filter tank increase, can by adjusting clear water reserviors effluent weir tail gates, change filter tank water inlet with it is clear The liquid level difference of pond water outlet, increases the filtering cloth head in filter tank, ensures filter tank continuous and steady operation, promotes filter tank anti-shock loading.
4, sewage plant processing water load increase, can by adjust clear water reserviors effluent weir tail gates, change filter tank water inlet with The liquid level difference of clear water reserviors water outlet, increases the filtering cloth head in filter tank, ensures filter tank continuous and steady operation, promotes filter tank overload operation Ability.
5, when front process adds PAM, denitrification deep-bed filter water inlet flco is made to increase, the viscosity of water body increases, can By adjusting clear water reserviors effluent weir tail gates, change the liquid level difference of filter tank water inlet and clear water reserviors water outlet, increase filter tank crosses drainage Head ensures filter tank continuous and steady operation, promotes the applicability in filter tank.
6, at filter tank cultivation stage or raising nitric efficiency, it can pass through and adjust clear water reserviors effluent weir tail gates, change filter The liquid level difference that pond intakes with clear water reserviors water outlet, ensures filter tank continuous and steady operation, to effectively extend the filter back washing period, has Culture conducive to denitrifying bacteria and proliferation improve the treatment effeciency in filter tank.
7, step(4)The backwashing wastewater generated in backwash process is back to front-end process grid by waste water lifting pump Place carries out circular treatment, prevents secondary pollution.
8, operational mode is flexibly, it can be achieved that the mutual conversion of plurality of operating modes, denitrification deep-bed filter can be filtered directly Operation, efficiently removes SS;When total phosphorus is exceeded, it is adjusted to the operation of tiny flocculation deep-bed filter, effectively removes SS and TP;As water outlet TN When cannot be up to standard, carbon source be added, removal TN, SS, TP can be synchronized, it is ensured that the full item of effluent quality is up to standard, technologically advanced, stable water outlet Up to standard, operation is easy, and cost of investment is low.
9, total canal of intaking is interior to be equipped with open-channel meter, deflector, and open-channel meter can measure the water by total canal of intaking Amount, the deflector in total canal of intaking can be such that medicament is sufficiently mixed with sewage, extend the reaction time, further increase hybrid reaction Effect.
10, denitrification deep-bed filter uses water-gas distribution filter block, and the material of water-gas distribution filter block is high density polyethylene (HDPE) material Matter, it is ensured that water-gas distribution is uniformly and strength air water back washing, filter tank use water-gas distribution filter block, forms air circulation chamber, recoil Secondary gas distribution when washing, after so that air is sufficiently mixed with water, strength is spouting from adjacent gap, and air is uniformly divided with water Cloth in entire denitrification deep-bed filter region, do not blocked in operational process, not aging, not burn into without easy wearing detail, using the longevity Life length.
11, filtering layer by grain size in 2-4mm, proportion >=2.6g/cm3, sphericity 0.8-0.9, the natural sea of sour solubility≤3% Sand forms, and plays the role of filtering, retains a large amount of SS, when adding medicament can effective dephosphorization, add and grown thereon when carbon source Denitrifying bacterium can effectively remove nitrate nitrogen.
Description of the drawings:
Fig. 1 is a kind of structural representation of the denitrification deep-bed filter system of the operation method of denitrification deep-bed filter system of the present invention Figure.
Specific implementation mode:
In order to deepen the understanding of the present invention, below in conjunction with embodiment and attached drawing, the invention will be further described, the implementation Example is only used for explaining the present invention, is not intended to limit the scope of the present invention..
A kind of operation method of denitrification deep-bed filter system of the present embodiment, as shown in Figure 1, specific steps include
(1)The structure of denitrification deep-bed filter system:Denitrification deep-bed filter system includes
One mixed cell, mixed cell include mixing pit 1, mixing pit water inlet pipe 2, carbon source throwing device 3, medicament addition device 4, Mixing agitator 5, mixing pit water inlet pipe 2 are connect with the downside of mixing pit 1, carbon source throwing device 3, medicament addition device 4 and Mixing agitator 5 from top to bottom stretches to the inside of mixing pit 1;
One denitrification filter element, denitrification filter element include intake total canal 6, filter tank both sides inlet channel 7, drop weir 8, anti-nitre Change deep-bed filter 9, the one end for total canal 6 of intaking is connect with mixing pit 1, and the other end is connect with filter tank both sides inlet channel 7, filter tank both sides Inlet channel 7 is connect by weir 8 of dropping with denitrification deep-bed filter 9, and drop weir 8 is placed in the upside of denitrification deep-bed filter 9, anti-nitre Change the supporting layer 10 for being internally provided with cross-distribution of deep-bed filter 9 and the filtering layer 11 being placed in denitrification deep-bed filter 9;
One backwash unit, backwash unit includes gas flushing group and water flushing group;Gas flushing group includes backwash wind turbine 12 And backwash gas pipeline 13, one end of backwash gas pipeline 13 are connect with backwash wind turbine 12, the other end and denitrification The lower end of deep-bed filter 9 connects;Water flushing group includes clear water reserviors 14 and discharge of wastewater pond 15, the upside of clear water reserviors 14 and anti-nitre Water inlet pipe 16 is equipped between the lower end of change deep-bed filter 9, the upside of clear water reserviors 14 is equipped with outlet pipe 17, and water inlet pipe 16 is close to clear water The position in pond 14 is equipped with inlet valve 18, and outlet pipe 17 is equipped with outlet valve 19, is equipped with backwash pump 20 in clear water reserviors 14, this is anti- Flush water pump 20 is connect by backwashing branch pipe 21 with water inlet pipe 16, and backwash branch pipe 21 is equipped with back flush valves 22, waste water Discharge pond 15 is connect with total canal 6 of intaking by backwash drainpipe 23, and backwash drainpipe 23 is equipped with backwash water discharging valve 24, clear water reserviors 14 are equipped with effluent weir 27, and the lower section of effluent weir 27 is equipped with gate 28, waste water lifting is equipped in discharge of wastewater pond 15 Pump 25, which is connected with wastewater discharge pipe road 26 and the outlet end on the wastewater discharge pipe road 26 and extends to outside;
(2)Filtering:Sewage is passed through in mixing pit 1, and opens carbon source throwing device 3, medicament addition device 4, is thrown in mixing pit 1 Enter carbon source and PAC medicaments, the hybrid reaction in mixing pit 1, each lead into after hybrid reaction into Shui Zongqu 6, filter tank both sides into Water channel 7, through dropping, weir 8 enters denitrification deep-bed filter 9, is filtered by filtering layer 11, filtered water enters clear water reserviors 14;
(3)Nitrogen discharges:Filter tank both sides inlet channel 7, inlet valve 18, outlet valve 19 are closed, backwash pump 20 is started, is opened anti- Flushing valve 22 and backwash water discharging valve 24, backwash 1min-5min, and the nitrogen in filtering layer 11 is by backwashing flow release Into air;It closes backwash pump 20, back flush valves 22 and backwashes water discharging valve 24, opening filter tank both sides inlet channel 7, Inlet valve 18, outlet valve 19 restore the operation of denitrification deep-bed filter 9;
(4)Backwash:First, air purge is carried out, water inlet is stopped, the liquid level in denitrification deep-bed filter 9 reduces at this time, closes filter tank Both sides inlet channel 7, inlet valve 18, outlet valve 19 open the backwash water discharging valve 24 on backwash drainpipe 23, start recoil Wind turbine 12 is washed, air recoil washes 1min-5min;Secondly, it carries out air water to backwash simultaneously, opens back flush valves 22 and recoil Wash water pump 20, air water backwashes 10min-18min simultaneously;Again, it is washed, closes backwash wind turbine 12, it is independent to continue water 5min-10min is backwashed, the residual air in removal denitrification deep-bed filter 9 and residual backwashing wastewater, backwashing wastewater Into in discharge of wastewater pond 15;Finally, back flush valves 22, backwash pump 20, backwash water discharging valve 24 are closed, filter is opened Pond both sides inlet channel 7, inlet valve 18, outlet valve 19 restore denitrification deep-bed filter 9 and run.
Step(1)In the structure of denitrification deep-bed filter system, the lower section of effluent weir 27 is equipped with gate 28.When denitrification depth When water inlet SS loads in bed filter tank 9 increase, it can pass through and adjust 14 effluent weir of clear water reserviors, 27 tail gates 28, change denitrification deep-bed filter The liquid level difference that 9 water inlets are discharged with clear water reserviors 14, increases the filtering cloth head of denitrification deep-bed filter 9, ensures denitrification deep-bed filter 9 Continuous and steady operation promotes filter tank anti-shock loading;When sewage plant processing water load increase, can be gone out by adjusting clear water reserviors 14 27 tail gates 28 of mill weir change the liquid level difference that denitrification deep-bed filter 9 is intake with the water outlet of clear water reserviors 14, increase the filter of denitrification depth bed The filtering cloth head in pond 9 ensures 9 continuous and steady operation of denitrification deep-bed filter, promotes filter tank overload operation ability;When leading portion work When skill adds PAM, the water inlet flco of denitrification deep-bed filter 9 is set to increase, the viscosity of water body increases, and opens 14 effluent weir 27 of clear water reserviors Tail gates 28 change the liquid level difference that denitrification deep-bed filter 9 is intake with the water outlet of clear water reserviors 14, increase denitrification deep-bed filter 9 Filtering cloth head ensures filter tank continuous and steady operation, promotes the applicability in filter tank;In the filter tank cultivation stage or improve nitric efficiency When, it opens and adjusts 14 effluent weir of clear water reserviors, 27 tail gates 28, change the liquid that denitrification deep-bed filter 9 is intake and clear water reserviors 14 are discharged Potential difference, ensure filter tank continuous and steady operation, to effectively extend the filter back washing period, be conducive to denitrifying bacteria culture and Proliferation, improves the treatment effeciency in filter tank.
Step(1)In the structure of denitrification deep-bed filter system, the depth of denitrification deep-bed filter 9 is 5.8m-6.6m;Instead Nitrify the liquid level difference ranging from 3m-3.6m of the water inlet water level and 27 water level of effluent weir of clear water reserviors 14 of deep-bed filter 9.
Step(1)In the structure of denitrification deep-bed filter system, open-channel meter, deflector are equipped in total canal 6 of intaking, it is bright Canal flowmeter can measure the water by total canal of intaking, and the deflector in total canal 6 of intaking can make medicament fully mixed with sewage It closes, extends the reaction time, further increase hybrid reaction effect.
Step(1)In the structure of denitrification deep-bed filter system, denitrification deep-bed filter 9 uses water-gas distribution filter block, gas The material of water distribution filter block is high density polyethylene (HDPE) material, it is ensured that water-gas distribution is uniformly and strength air water back washing, filter tank use Water-gas distribution filter block, forms air circulation chamber, when backwash secondary gas distribution, after so that air is sufficiently mixed with water, between adjacent Strength is spouting in gap, and air and water are evenly distributed in entire 9 region of denitrification deep-bed filter, do not blocked up in operational process Plug, not aging, burn into is not long without easy wearing detail, service life.
Step(1)In the structure of denitrification deep-bed filter system, 11 thickness of filtering layer is 1.8m-2.2m, and filtering layer 11 is by grain size In 2-4mm, proportion >=2.6g/cm3, sphericity 0.8-0.9, the natural sea sand of sour solubility≤3%, porosity 0.2-0.5, naturally Sea sand filtering layer plays the role of filtering, retain a large amount of SS, when adding medicament can effective dephosphorization, add and grown thereon when carbon source Denitrifying bacterium can effectively remove nitrate nitrogen;Supporting layer 10 is made of 3-19mm cobblestones, and the thickness of supporting layer 10 is 400mm- 600mm。
Step(1)In the structure of denitrification deep-bed filter system, medicament addition device 4 includes dissolving case, liquid reserve tank, stirring Machine, metering pump a, carbon source throwing device 3 include carbon source fluid reservoir, metering pump b, discharging pump, on-line dilution device and automatically add Glassware improves the degree of automation, technologically advanced, easy to operate.
Step(4)The backwashing wastewater generated in backwash process is back to by waste water lifting pump 25 to front-end process lattice Circular treatment is carried out at grid, prevents secondary pollution.
Influent waste water water quality and effluent quality comparison are as shown in the table under the present embodiment:
A kind of operation process of denitrification deep-bed filter of the present invention includes structure, filtering, the nitrogen of denitrification deep-bed filter system Release and backwash four steps, can synchronize removal TN, SS, TP, stable water outlet is up to standard, wherein nitrogen discharge the step for be The release of the nitrogen in filtering layer is will build up by backwashing flow in an atmosphere, it is recyclable to release nitrogen, effectively solve waste water filtering mistake The gas occurred in journey blocks up phenomenon, ensures the less energy consumption of denitrification deep-bed filter.
Denitrification deep-bed filter includes mixed cell, denitrification filter element and backwash unit, and the present invention is to sewage By filtering, nitrogen release and backwash processing, wastewater treatment efficiency is further increased, it is reasonable in design;Mixed cell Mixing pit 1 in, sewage is quickly mixed with the carbon source and medicament added, and is uniformly mixed by mixing agitator 5, then is passed through Intake total canal 6 and filter tank both sides inlet channel 7 enters denitrification deep-bed filter 9 and is filtered, and backwashes the clear water reserviors 14 of unit It is equipped with effluent weir 27, the lower section of effluent weir 27 is equipped with gate 28, and drop 8 water level of weir is adjusted and clear water reserviors 14 are discharged water level Liquid level difference can promote filter tank anti-shock loading, filter tank overload operation ability, the applicability in filter tank, it is anti-can effectively to extend filter tank Flushing cycle is conducive to culture and the proliferation of denitrifying bacteria, improves the treatment effeciency in filter tank.
It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, above-described embodiment and explanation Merely illustrating the principles of the invention described in book, without departing from the spirit and scope of the present invention, the present invention also has Various changes and modifications, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention It is defined by the appending claims and its equivalent thereof.

Claims (9)

1. a kind of operation method of denitrification deep-bed filter system, it is characterised in that:Specific steps include
(1)The structure of denitrification deep-bed filter system:The denitrification deep-bed filter system includes
One mixed cell, the mixed cell include mixing pit, mixing pit water inlet pipe, carbon source supply device, medicament addition device, mix Blender is closed, the downside of the mixing pit water inlet pipe and mixing pit connects, the carbon source supply device, medicament addition device and mixed Close the inside that blender from top to bottom stretches to mixing pit;
One denitrification filter element, the denitrification filter element include the total canal, filter tank both sides inlet channel, drop weir, anti-of intaking Deep-bed filter is nitrified, one end of the total canal of water inlet is connect with mixing pit, and the other end is connect with filter tank both sides inlet channel, the filter Pond both sides inlet channel is connect by weir of dropping with denitrification deep-bed filter, and the drop weir is placed in the upper of denitrification deep-bed filter Side, the supporting layer for being internally provided with cross-distribution of the denitrification deep-bed filter and the filter being placed in denitrification deep-bed filter Layer;
One backwash unit, the backwash unit includes gas flushing group and water flushing group;The gas flushing group includes recoil Wash wind turbine and backwash gas pipeline, one end of the backwash gas pipeline connect with backwash wind turbine, the other end with instead Nitrify the lower end connection of deep-bed filter;The water flushing group includes clear water reserviors and discharge of wastewater pond, the upside of the clear water reserviors Water inlet pipe is equipped between the lower end of denitrification deep-bed filter, the upside of the clear water reserviors is equipped with outlet pipe, and the water inlet pipe leans on The position of nearly clear water reserviors is equipped with inlet valve, and the outlet pipe is equipped with outlet valve, backwash pump is equipped in the clear water reserviors, should Backwash pump is connect by backwashing branch pipe with water inlet pipe, and the backwash branch pipe is equipped with back flush valves, the waste water Discharge pond is connect with total canal of intaking by backwash drainpipe, and the backwash drainpipe is equipped with backwash water discharging valve, institute It states clear water reserviors and is equipped with effluent weir, the lower section of effluent weir is equipped with gate, is equipped with waste water lifting pump in the discharge of wastewater pond, this is useless Water elevator pump is connected with wastewater discharge pipe road and the outlet end on the wastewater discharge pipe road and extends to outside;
(2)Filtering:Sewage is passed through in mixing pit, and opens carbon source throwing device, medicament addition device, and carbon is put into mixing pit Source and PAC medicaments, the hybrid reaction in mixing pit are each led into after hybrid reaction into Shui Zongqu, filter tank both sides inlet channel, warp Drop weir enters denitrification deep-bed filter, is filtered by filtering layer, filtered water enters clear water reserviors;
(3)Nitrogen discharges:Filter tank both sides inlet channel, inlet valve, outlet valve are closed, backwash pump is started, opens backwash valve Door and backwash water discharging valve, backwash 1min-5min, and the nitrogen in filtering layer is discharged into the atmosphere by backwashing flow;It closes Backwash pump, back flush valves and backwash water discharging valve are closed, filter tank both sides inlet channel, inlet valve, outlet valve is opened, restores The operation of denitrification deep-bed filter;
(4)Backwash:First, air purge is carried out, water inlet is stopped, the liquid level in denitrification deep-bed filter reduces at this time, closes filter tank Both sides inlet channel, inlet valve, outlet valve open the backwash water discharging valve on backwash drainpipe, start backwash wind turbine, empty Gas backwashes 1min-5min;Secondly, it carries out air water to backwash simultaneously, opens back flush valves and backwash pump, air water are same When backwash 10min-18min;Again, it is washed, closes backwash wind turbine, continued water and individually backwash 5min-10min, The residual air and residual backwashing wastewater, backwashing wastewater removed in denitrification deep-bed filter enters in discharge of wastewater pond; Finally, back flush valves, backwash pump, backwash water discharging valve are closed, filter tank both sides inlet channel, inlet valve, water outlet are opened Valve restores the operation of denitrification deep-bed filter.
2. a kind of operation method of denitrification deep-bed filter system according to claim 1, it is characterised in that:The step (4)The backwashing wastewater generated in backwash process is back at front-end process grid by waste water lifting pump and is carried out at cycle Reason.
3. a kind of operation method of denitrification deep-bed filter system according to claim 1, it is characterised in that:The step (1)In the structure of denitrification deep-bed filter system, the effluent weir water level of intake water level and the clear water reserviors of denitrification deep-bed filter Liquid level difference ranging from 3m-3.6m.
4. wanting a kind of 1 operation method of denitrification deep-bed filter system according to right, it is characterised in that:The step(1) In the structure of denitrification deep-bed filter system, open-channel meter, deflector are equipped in total canal of intaking.
5. a kind of denitrification deep-bed filter system according to claim 1, it is characterised in that:The step(1)Denitrification is deep In the structure of bed filter tank system, denitrification deep-bed filter uses water-gas distribution filter block, and the material of water-gas distribution filter block is high density Polyethylene material.
6. a kind of denitrification deep-bed filter system according to claim 1, it is characterised in that:The step(1)Denitrification is deep In the structure of bed filter tank system, thickness of filter bed 1.8m-2.2m, for filtering layer by grain size in 2-4mm, proportion >=2.6g/cm3 is spherical 0.8-0.9 is spent, the natural sea sand composition of sour solubility≤3%, porosity 0.2-0.5, the supporting layer is by 3-19mm cobblestone groups At the thickness of supporting layer is 400mm-600mm.
7. a kind of denitrification deep-bed filter system according to claim 1, it is characterised in that:The step(1)Denitrification is deep In the structure of bed filter tank system, medicament addition device includes dissolving case, liquid reserve tank, blender, metering pump a.
8. a kind of denitrification deep-bed filter system according to claim 1, it is characterised in that:The step(1)Denitrification is deep In the structure of bed filter tank system, carbon source throwing device includes carbon source fluid reservoir, metering pump b, discharging pump, on-line dilution device and complete Automatic feeder.
9. according to a kind of denitrification deep-bed filter system of claim 1 or 5, it is characterised in that:The step(1)Denitrification In the structure of deep-bed filter system, the depth of denitrification deep-bed filter is 5.8m-6.6m.
CN201810204678.XA 2018-03-13 2018-03-13 A kind of operation method of denitrification deep-bed filter system Pending CN108314183A (en)

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CN110697911B (en) * 2019-11-26 2021-09-28 南京大学 Water inlet rectifying weir plate of denitrification filter and installation and debugging method thereof

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