CN110963566A - Treatment device for high-nitrate-nitrogen wastewater and application thereof - Google Patents

Treatment device for high-nitrate-nitrogen wastewater and application thereof Download PDF

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Publication number
CN110963566A
CN110963566A CN201811148900.5A CN201811148900A CN110963566A CN 110963566 A CN110963566 A CN 110963566A CN 201811148900 A CN201811148900 A CN 201811148900A CN 110963566 A CN110963566 A CN 110963566A
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water outlet
filter
cleaning
anaerobic
water
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Chinese (zh)
Inventor
张宾
程学文
王珺
李海龙
莫馗
侯秀华
高凤霞
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Sinopec Beijing Research Institute of Chemical Industry
China Petroleum and Chemical Corp
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Sinopec Beijing Research Institute of Chemical Industry
China Petroleum and Chemical Corp
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Priority to CN201811148900.5A priority Critical patent/CN110963566A/en
Publication of CN110963566A publication Critical patent/CN110963566A/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
    • C02F3/2833Anaerobic digestion processes using fluidized bed reactors
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/15N03-N

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

The invention discloses a treatment device for high-nitrate-nitrogen wastewater, which comprises: a water supply device; the anaerobic fluidized bed reactor is connected with the water supply device; an anaerobic water outlet tank connected with the anaerobic fluidized bed reactor; and a circulation device connected with the anaerobic water outlet tank; the anaerobic fluidized bed reactor is provided with a first water inlet connected with a water supply device and a first water outlet connected with an anaerobic water outlet tank, the anaerobic water outlet tank is provided with a second water inlet connected with the first water outlet, a second water outlet connected with a circulating device and a third water outlet, the circulating device is provided with a self-cleaning filter and a circulating pump, the self-cleaning filter is provided with a third water inlet and a fourth water outlet, wherein the third water inlet is connected with the second water outlet, and the fourth water outlet is connected with the first water inlet through the circulating pump. The self-cleaning filter is arranged in front of the circulating pump to intercept solid impurities, so that the treatment device can stably operate for a long time.

Description

Treatment device for high-nitrate-nitrogen wastewater and application thereof
Technical Field
The invention relates to the field of high-nitrate-nitrogen wastewater treatment, in particular to a high-nitrate-nitrogen wastewater treatment device and application thereof.
Background
In recent years, nitrogen pollution has become one of the social hotspots in the field of water treatment. With the increasing of the eutrophication problem of the water body in China and the improvement of the sewage discharge standard in the future, the removal of nitrogen in water becomes one of the key problems concerned in the water treatment field. How to economically, efficiently and safely remove nitrate nitrogen from water and develop a high-efficiency and stable sewage enhanced denitrification technology becomes an urgent technical demand in the field of sewage treatment.
At present, sewage treatment is subject to high standard discharge requirements, such as the total nitrogen content (TN) of national effluent standards of America, Canada and the like is less than 3mg/L, and the total phosphorus content (TP) is less than 0.18 mg/L. The processes commonly used for denitrification of sewage at present comprise an activated sludge process, a suspended filler biofilm process, a biological filter and the like. The activated sludge process has low sludge concentration, can not treat high-load sewage, and has the advantages of easy expansion of sludge, large occupied area, large-scale sedimentation equipment and large amount of residual sludge. The suspended filler biofilm process is characterized in that a certain amount of filler with density close to that of water is added into a reactor to provide a habitat for the growth of microorganisms, so that the biomass and the biological species in the reactor can be improved, and the treatment efficiency of the reactor is further improved. The suspended filler biofilm denitrification process has the characteristics of high treatment efficiency, good denitrification effect, simple operation and the like. The method is to make the denitrifying bacteria attach to the filler medium in the reactor in the form of biological membrane.
The packing medium in the anoxic fluidized bed continuously moves in the sewage and is uniformly mixed with the sewage, the efficiency is far higher than that of a fixed bed, and the anoxic fluidized bed is the anoxic reactor with the highest organic matter load at present. The smaller the filler medium particles are, the larger the surface area of the filler medium particles is, and the higher the efficiency of the reactor is; the lower the packing density, the lower the upflow velocity required for fluidization and the lower the running cost, and therefore, many scholars prefer small and light substances as the packing for the anoxic fluidized bed. The existing downward flow reactor has large water inlet pressure, so that the operation cost is greatly increased, and the operation and maintenance are not facilitated; the water distribution system of the conventional anoxic denitrification fluidized bed treatment device needs to be cleaned frequently and kept smooth, and particularly when the reactor runs in an overload state, the phenomenon of filter material blockage is easy to occur, and the adverse effects on the water inlet distribution and the wastewater treatment effect are generated; the anoxic fluidized bed needs to be backwashed regularly to remove thicker biological membranes attached to the surface of the filler, and a large amount of small and light filler flows into a circulating pipeline in the air-water combined backwashing process, so that the pipeline is blocked, even a pump head is damaged, and the long-term stable operation of the reactor is seriously influenced.
Disclosure of Invention
In view of the problems in the prior art, an object of the present invention is to provide a device for treating high nitrate-nitrogen wastewater and an application thereof, in which a self-cleaning filter is disposed in front of a circulating pump to intercept solid impurities (such as biofilm or packing) in a denitrified material flow circulating back to an anaerobic fluidized bed reactor, so as to effectively prevent the solid impurities from blocking a circulating pipeline or a water distribution system of the anaerobic fluidized bed reactor, thereby enabling the treatment device to operate stably for a long time.
The invention provides a treatment device for high-nitrate-nitrogen wastewater, which comprises:
a water supply device;
the anaerobic fluidized bed reactor is connected with the water supply device;
an anaerobic water outlet tank connected with the anaerobic fluidized bed reactor; and
the circulating device is connected with the anaerobic water outlet tank;
the anaerobic fluidized bed reactor is provided with a first water inlet connected with the water supply device and a first water outlet connected with the anaerobic water outlet tank,
the anaerobic water outlet tank is provided with a second water inlet connected with the first water outlet, a second water outlet connected with the circulating device and a third water outlet,
the circulating device comprises a self-cleaning filter and a circulating pump, the self-cleaning filter is provided with a third water inlet and a fourth water outlet, the third water inlet is connected with the second water outlet, and the fourth water outlet is connected with the first water inlet through the circulating pump.
The inventor of the application finds in research that the self-cleaning filter is arranged in front of the circulating pump to intercept solid impurities (such as a biological film or filler) in a denitrification material flow circulating back to the anaerobic fluidized bed reactor, so that the solid impurities can be effectively prevented from blocking a circulating pipeline or a water distribution system of the anaerobic fluidized bed reactor, and further, the treatment device can stably run for a long time.
According to the invention, the remaining part of the denitrogenation stream can be discharged through the outlet conduit.
According to the invention, the high nitrate nitrogen wastewater refers to wastewater with nitrate nitrogen content of more than 1000 mg/L.
In a preferred embodiment of the present invention,
the water supply device is used for providing high-nitrate nitrogen wastewater;
the anaerobic fluidized bed reactor is used for carrying out denitrification treatment on the high-nitrate-nitrogen wastewater;
the anaerobic water outlet tank is used for receiving a denitrification material flow obtained through denitrification treatment;
the circulating device is used for circulating a part of denitrogenation material flow back to the anaerobic fluidized bed reactor.
In a preferred embodiment of the present invention, the self-cleaning filter includes a second speed reducer, a filter body, and a fixing member for fixing the filter body,
the filter main body comprises a hollow shell, a top cover arranged on the upper part of the shell and a settling tank arranged on the lower part of the shell, a second filter screen is arranged on the inner wall of the shell, a second central shaft is arranged along the central axis of the shell, at least one rotating rod is arranged on the second central shaft along the horizontal direction, second cleaning components are respectively arranged at two ends of the rotating rod,
the second speed reducer is fixed on the top cover of the filter main body, and the second middle shaft penetrates through the top cover to be connected with the second speed reducer, so that the second speed reducer drives the second middle shaft to rotate, and the rotating rod drives the second cleaning component to clean the biological filler attached to the second filter screen and collect the biological filler in the settling tank.
According to the present invention, by using the self-cleaning filter having the specific structure as described above, interception of solid impurities (e.g., biofilm or packing) in the denitrification stream circulated back to the anaerobic fluidized bed reactor is facilitated.
According to the invention, the housing is preferably a cylindrical housing.
In a preferred embodiment of the present invention, the second cleaning member includes a second brush fixing rod fixed to one end of the rotating rod and a second cleaning brush fixed to the brush fixing rod and disposed toward the second filter screen.
According to the invention, the second brush is made of stainless steel, and the length of the second brush is preferably 1-2 mm slightly penetrating through the meshes of the filter screen; the single running time of the brush is 20 s-60 s, and the intermittent time is 5 s-60 s.
According to the self-cleaning filter, the second cleaning component is driven by the second speed reducer to do circular motion, the second cleaning brush is composed of compact stainless steel wires which are transversely arranged in parallel, the tail ends of the stainless steel wires and the second filter screen form relative motion through the circular motion, so that meshes of the second filter screen are kept smooth, the purpose of cleaning the filter screen is achieved, and the normal operation of the self-cleaning filter is further ensured.
In a preferred embodiment of the present invention, the fixing member includes a fixing bracket connected to a lower portion of the housing and a base.
In a preferred embodiment of the present invention, the anaerobic fluidized bed reactor comprises a tower body and a tower head;
the tower head and the tower body are both of hollow cylinder structures, the tower head is positioned above the tower body, the diameter of the tower head is larger than that of the tower body,
the first water inlet and the air inlet are arranged on the side wall of the lower part of the tower body, the sludge discharge port is arranged on the side wall of the upper part of the tower body, the first water outlet is arranged on the side wall of the tower head,
the tower head is provided with a three-phase separator, one end of an exhaust port of the three-phase separator is positioned outside the top end of the tower head, the other end of the three-phase separator is positioned at the bottom end of the tower head,
and an overflow weir is arranged beside the first water outlet in the tower head.
According to the invention, a gas-water distributor is arranged in the tower body of the anaerobic fluidized bed reactor and above the water inlet of the anoxic fluidized bed, and is used for improving the uniformity of water distribution.
According to the invention, the gas-water distributor comprises: the gas-water distribution plate, the long-handle filter head and the support piece;
wherein the gas-water distribution plate is provided with reserved holes,
the long-handle filter head comprises an external thread water and air distribution pipe, a rubber pad, a filter joint and a filter cap, the filter cap is positioned at the top of the external thread water and air distribution pipe, the filter joint is positioned below the filter cap and sleeved on the external thread water and air distribution pipe, the rubber pad is positioned below the filter joint and sleeved on the external thread water and air distribution pipe,
the external thread water and gas distribution pipe is arranged in the reserved hole, the rubber pad is positioned above the reserved hole, the external thread water and gas distribution pipe is fixed on the gas-water distribution plate through an internal thread sleeve,
the gas-water distribution plate is horizontally arranged above the supporting piece.
According to the invention, the external thread water and gas distribution pipe is provided with a bottom water inlet, an overflowing seam and/or a gas-liquid balance hole; preferably, the width of the overflowing slit is 0.8 mm-1.2 mm; the length of the overflowing seam is 7.0 mm-8.0 mm; the number of the filter seams is 8-20; the width of the filter seam is 2.0 mm-2.5 mm.
According to the invention, the external diameter of the external thread water and air distribution pipe is 2mm 0-22 mm, and the length is 350 mm-450 mm.
According to the invention, the distance between the long-handle filter heads is 10cm-30 cm.
According to the invention, a window is arranged on the outer wall of the upper part of the tower body; and/or
Manholes are arranged on the side wall of the tower body and below the gas-water distributor.
In a preferred embodiment of the invention, a rotary slag remover is arranged in the tower head, the rotary slag remover comprises,
the first speed reducer is fixed above the top end of the tower head;
a first filter screen fixed on the inner wall of the tower head and positioned above the overflow weir,
the first middle shaft is arranged along the central axis of the tower head and connected with the first speed reducer;
the rotating beam is arranged at the lower end of the first middle shaft along the horizontal direction; and
first cleaning members vertically provided at both ends of the rotary beam;
wherein the first cleaning component comprises a first brush fixing rod and a first cleaning brush which is fixed at the lower part of the brush fixing rod and is arranged towards the first filter screen,
therefore, the first speed reducer drives the first middle shaft to rotate, and the rotating beam drives the first cleaning component to clean the biological filler attached to the first filter screen.
According to the invention, the rotary slag remover is arranged in the tower head of the anaerobic fluidized bed reactor, so that most biological fillers can be intercepted, and the filler is effectively prevented from being greatly lost in the normal operation or backwashing process of the device. In addition, the rotary slag remover also realizes the primary interception of solid impurities such as biological fillers, lightens the workload of the self-cleaning filter and improves the interception efficiency of the whole device to the solid impurities.
According to the invention, the first brush is made of stainless steel, and the length of the first brush is preferably 1-2 mm slightly penetrating through the meshes of the filter screen; the single running time of the brush is 20 s-60 s, and the intermittent time is 5 s-60 s.
According to the invention, the first cleaning component is driven by the first speed reducer to do circular motion, the first cleaning brush is composed of compact stainless steel wires which are transversely arranged in parallel, and the tail ends of the stainless steel wires and the first filter screen form relative motion through the circular motion, so that meshes of the first filter screen are kept smooth, the purpose of cleaning the filter screen is achieved, and the normal operation of the rotary slag remover is further ensured.
In a preferred embodiment of the present invention, the first filter has a mesh aperture of 1.5mm to 2.5 mm; the aperture of the meshes of the second filter screen is 0.7mm-1.5 mm.
According to the present invention, interception of solid impurities is facilitated by limiting the mesh aperture of the first filter and the second filter within the above range.
In a preferred embodiment of the present invention, the biological filler collected in the settling tank is recycled to the anaerobic fluidized bed reactor.
In a preferred embodiment of the present invention, the self-cleaning filter further includes a control device for operating the second cleaning member to clean the second filter screen when a pressure in the self-cleaning filter reaches a predetermined pressure threshold value.
According to the invention, the pressure threshold is 25kPa to 100 kPa.
According to the present invention, after the self-cleaning filter is continuously supplied with water for a certain time, the second filter screen is gradually clogged with the filler or the sludge, the internal pressure of the self-cleaning filter increases, and when the internal pressure reaches a predetermined pressure threshold, the second cleaning means starts to operate under the control of the control device to clean the second filter screen, thereby cleaning the filler or the sludge on the second filter screen.
The invention also provides application of the device in treating high nitrate nitrogen wastewater.
The treatment device for high nitrate nitrogen wastewater provided by the invention can stably run for more than half a year.
Drawings
FIG. 1 is a schematic view of an apparatus for treating high nitrate nitrogen wastewater according to example 1 of the present invention.
Fig. 2 shows an enlarged view of a portion of the rotary slag remover of fig. 1.
Figure 3 shows an enlarged partial view of the self-cleaning filter of figure 1.
Reference numerals: 1-a water supply device; 11-a water inlet pipe; 12-a water inlet pump; 13-a flow meter; 2-anaerobic fluidized bed reactor; 3-a tower body; 31-a first water inlet; 32-an air inlet; 33-a window; 34-a manhole; 35-gas and water distributor; 36-a sludge discharge port; 4-tower head; 41-a first water outlet; 42-a three-phase separator; 43-a weir; 5-rotating a slag remover; 51-a first reducer; 52-a first filter; 53-first medial axis; 54-a rotating beam; 55-a first cleaning member; 551-first brush fixing lever; 552-first sweeping brush; 6-anaerobic water outlet tank; 61-a second water inlet; 62-a second water outlet; 63-a third water outlet; 7-a circulation device; 8-self-cleaning filter; 81-a second reducer; 82-a filter body; 83-a stationary part; 821-a housing; 822-a top cover; 823-settling tank; 824-a second filter; 825-a second medial axis; 826-rotating bar; 827 — a second cleaning member; 828-third water inlet; 829-fourth water outlet; 830-slag discharge port; 831-electromagnetic switch; 832-control means; 827 a-second brush fixing lever; 827 b-second cleaning brush; 9-circulating pump.
Detailed Description
The present invention will be described in detail below with reference to examples and the accompanying drawings, but the scope of the present invention is not limited to the following description.
Example 1
In this example, an apparatus for treating high nitrate nitrogen wastewater according to an embodiment of the present invention will be described with reference to fig. 1, 2 and 3.
The device for treating high nitrate-nitrogen wastewater as shown in figure 1 comprises:
the water supply device 1 comprises a water inlet pipeline 11, a water inlet pump 12 and a flow meter 13 and is used for providing high nitrate nitrogen wastewater, wherein the water inlet pump 12 and the flow meter 13 are arranged on the water inlet pipeline, and the flow meter 13 is arranged in the downstream direction of the water inlet pump 12;
the anaerobic fluidized bed reactor 2 is connected with the water inlet pipeline and is used for carrying out denitrification treatment on the high-nitrate nitrogen wastewater, wherein the anaerobic fluidized bed reactor 2 comprises a tower body 3 and a tower head 4 which are of hollow cylinder structures, the tower head 4 is positioned above the tower body 3, the diameter of the tower head 4 is larger than that of the tower body 3,
a first water inlet 31 (a water inlet pipeline is connected with the first water inlet 31) and an air inlet 32 are arranged on the lower side wall of the tower body 3, an air-water distributor 35 is arranged between the first water inlet 31 and the air inlet 32, a sludge discharge port 36 is arranged on the upper side wall of the tower body 3, a first water outlet 41 is arranged on the side wall of the tower head 4, a window 33 is arranged on the outer wall of the upper part of the tower body 3,
the tower head 4 is provided with a three-phase separator 42, one end of an exhaust port of the three-phase separator 42 is positioned outside the top end of the tower head 4, the other end of the three-phase separator 42 is positioned at the bottom end of the tower head 4,
an overflow weir 43 is arranged beside the first water outlet 41 in the tower head 4,
a manhole 34 is arranged on the side wall of the tower body 3 and below the gas-water distributor 35,
still be provided with rotatory slagging-off machine 5 in the tower head 3, as shown in fig. 2, it includes:
a first speed reducer 51 fixed above the top end of the tower head 3;
a first filter screen 52 with the mesh aperture of 1.5mm fixed on the inner wall of the tower head 3 and positioned above the overflow weir 43,
a first middle shaft 53 connected with a first speed reducer 51 and arranged along the central axis of the tower head 3;
a rotation beam 54 provided in the horizontal direction at the lower end of the first center shaft 53; and
first cleaning members 55 vertically provided at both ends of the rotary beam 54;
wherein the first cleaning member 55 includes a first brush fixing rod 551, and a first cleaning brush 552 fixed to a lower portion of the brush fixing rod 551 and disposed toward the first filter 52,
therefore, the first speed reducer 51 drives the first middle shaft to rotate, so that the rotating beam 54 drives the first cleaning component 55 to clean the biological filler attached to the first filter screen 52;
an anaerobic water outlet tank 6 connected to the first water outlet 41 through a pipe for receiving a denitrification material flow obtained by denitrification, wherein the anaerobic water outlet tank 6 is provided with a second water inlet 61, a second water outlet 63 and a third water outlet 62 connected to the first water outlet 41;
a circulation device 7 connected with the second water outlet 63 through a pipe for circulating a part of the denitrification material flow back to the anaerobic fluidized bed reactor 2, wherein the circulation device 7 comprises a self-cleaning filter 8 and a circulation pump 9, the self-cleaning filter 8 is provided with a third water inlet 828 and a fourth water outlet 829, wherein the third water inlet 828 is connected with the second water outlet 63, the fourth water outlet 829 is connected with the first water inlet 31 via the circulation pump 9, wherein, as shown in FIG. 3, the self-cleaning filter 8 comprises a second decelerator 81, a filter body 82 and a fixing part 83 for fixing the filter body 82,
the filter main body 82 includes a hollow housing 821, a top cover 822 disposed on the upper portion of the housing 821, and a settling tank 823 disposed on the lower portion of the housing 821, a second filter screen 824 having a mesh aperture of 1.0mm is disposed on the inner wall of the housing 821, a second central axis 825 is disposed along the central axis of the housing 821, at least one rotating rod 826 is disposed on the second central axis 825 along the horizontal direction, second cleaning members 827 are respectively disposed at both ends of the rotating rod 826,
the second cleaning member 827 includes a second brush fixing rod 827a and a second cleaning brush 827b fixed to the brush fixing rod 827a and disposed toward the second filter screen 824, the second brush fixing rod 827a being fixed to one end of the rotating rod 826.
The second speed reducer 81 is fixed on the top cover of the filter body 82, the second central shaft 825 penetrates through the top cover 822 to be connected with the second speed reducer 81, so that the second speed reducer 81 drives the second central shaft 825 to rotate, the rotating rod 826 drives the second cleaning component 827 to clean the biological filler attached to the second filter screen 824, the biological filler is collected in the sedimentation tank 823, and the collected biological filler is discharged through a slag discharge port 830 and an electromagnetic switch 831 which are arranged at the bottom of the sedimentation tank 823;
housing 821 of self-cleaning filter 8 is further provided with control device 832 for operating second cleaning member 827 to clean second filter screen 824 when pressure in self-cleaning filter 8 reaches a predetermined pressure threshold
Comparative example 1
The treating apparatus of comparative example 1 differs from that of example 1 only in that a self-cleaning filtration apparatus is not provided.
Test example 1
The treatment apparatuses of example 1 and comparative example 1 were used to treat high nitrate nitrogen wastewater (nitrate nitrogen content in wastewater is 3000mg/L), and specifically, the treatment apparatuses of example 1 and comparative example 1 were fed with high nitrate nitrogen wastewater to allow the apparatuses to operate normally. The result shows that the nitrate and nitrogen content of the effluent of the device in the example 1 is still below 100mg/L after the device runs stably for 180 days, while the device in the comparative example 1 runs for 5 days, the overflow seam is blocked, and the normal running of the device is influenced.
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not set any limit to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The invention can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the invention. Although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.

Claims (11)

1. A treatment device for high-nitrate-nitrogen wastewater comprises:
a water supply device;
the anaerobic fluidized bed reactor is connected with the water supply device;
an anaerobic water outlet tank connected with the anaerobic fluidized bed reactor; and
the circulating device is connected with the anaerobic water outlet tank;
the anaerobic fluidized bed reactor is provided with a first water inlet connected with the water supply device and a first water outlet connected with the anaerobic water outlet tank,
the anaerobic water outlet tank is provided with a second water inlet connected with the first water outlet, a second water outlet connected with the circulating device and a third water outlet,
the circulating device comprises a self-cleaning filter and a circulating pump, the self-cleaning filter is provided with a third water inlet and a fourth water outlet, the third water inlet is connected with the second water outlet, and the fourth water outlet is connected with the first water inlet through the circulating pump.
2. The processing apparatus according to claim 1,
the water supply device is used for providing high-nitrate nitrogen wastewater;
the anaerobic fluidized bed reactor is used for carrying out denitrification treatment on the high-nitrate-nitrogen wastewater;
the anaerobic water outlet tank is used for receiving a denitrification material flow obtained through denitrification treatment;
the circulating device is used for circulating a part of denitrogenation material flow back to the anaerobic fluidized bed reactor.
3. The processing apparatus according to claim 1 or 2, wherein the self-cleaning filter includes a second speed reducer, a filter main body, and a fixing member that fixes the filter main body,
the filter main body comprises a hollow shell, a top cover arranged on the upper part of the shell and a settling tank arranged on the lower part of the shell, a second filter screen is arranged on the inner wall of the shell, a second central shaft is arranged along the central axis of the shell, at least one rotating rod is arranged on the second central shaft along the horizontal direction, second cleaning components are respectively arranged at two ends of the rotating rod,
the second speed reducer is fixed on the top cover of the filter main body, and the second middle shaft penetrates through the top cover to be connected with the second speed reducer, so that the second speed reducer drives the second middle shaft to rotate, and the rotating rod drives the second cleaning component to clean the biological filler attached to the second filter screen and collect the biological filler in the settling tank.
4. The treating apparatus according to claim 3, wherein the second cleaning member comprises a second brush holding lever fixed to one end of the rotating lever and a second cleaning brush fixed to the brush holding lever and disposed toward the second filter net.
5. The processing apparatus according to any one of claims 1 to 4, wherein the fixing member comprises a fixing bracket and a base, the fixing bracket being connected with a lower portion of the housing.
6. The processing plant according to any one of claims 1 to 5, characterized in that the anaerobic fluidized bed reactor comprises a tower body and a tower head;
the tower head and the tower body are both of hollow cylinder structures, the tower head is positioned above the tower body, the diameter of the tower head is larger than that of the tower body,
the first water inlet and the air inlet are arranged on the side wall of the lower part of the tower body, the sludge discharge port is arranged on the side wall of the upper part of the tower body, the first water outlet is arranged on the side wall of the tower head,
the tower head is provided with a three-phase separator, one end of an exhaust port of the three-phase separator is positioned outside the top end of the tower head, the other end of the three-phase separator is positioned at the bottom end of the tower head,
and an overflow weir is arranged beside the first water outlet in the tower head.
7. The processing apparatus according to any of claims 1-6, characterized in that a rotary slag remover is arranged in the tower head, the rotary slag remover comprising,
the first speed reducer is fixed above the top end of the tower head;
a first filter screen fixed on the inner wall of the tower head and positioned above the overflow weir,
the first middle shaft is arranged along the central axis of the tower head and connected with the first speed reducer;
the rotating beam is arranged at the lower end of the first middle shaft along the horizontal direction; and
first cleaning members vertically provided at both ends of the rotary beam;
wherein the first cleaning component comprises a first brush fixing rod and a first cleaning brush which is fixed at the lower part of the brush fixing rod and is arranged towards the first filter screen,
therefore, the first speed reducer drives the first middle shaft to rotate, and the rotating beam drives the first cleaning component to clean the biological filler attached to the first filter screen.
8. The processing apparatus according to claim 7, wherein the first filter has a mesh aperture of 1.5mm to 2.5 mm; the aperture of the meshes of the second filter screen is 0.7mm-1.5 mm.
9. The treatment plant according to any one of claims 1 to 8, characterized in that the biological filler collected in the settling tank is recycled to the anaerobic fluidized bed reactor.
10. The processing apparatus according to any one of claims 1 to 9, wherein the self-cleaning filter is further provided with a control device for operating the second cleaning means to clean the second filter when the pressure in the self-cleaning filter reaches a set pressure threshold value.
11. Use of a device according to any one of claims 1-10 for the treatment of high nitrate nitrogen wastewater.
CN201811148900.5A 2018-09-29 2018-09-29 Treatment device for high-nitrate-nitrogen wastewater and application thereof Pending CN110963566A (en)

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CN201811148900.5A CN110963566A (en) 2018-09-29 2018-09-29 Treatment device for high-nitrate-nitrogen wastewater and application thereof

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CN108275774A (en) * 2017-01-05 2018-07-13 中国石油化工股份有限公司 A kind of anoxic denitrification fluidized bed processor
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