CN214528321U - Tandem type biological denitrification reactor - Google Patents
Tandem type biological denitrification reactor Download PDFInfo
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- CN214528321U CN214528321U CN202121446409.8U CN202121446409U CN214528321U CN 214528321 U CN214528321 U CN 214528321U CN 202121446409 U CN202121446409 U CN 202121446409U CN 214528321 U CN214528321 U CN 214528321U
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Abstract
The utility model belongs to the field of environmental protection water treatment and discloses a serial biological denitrification reactor. The reactor comprises a carbon source adding pipeline, a sewage adding pipeline, a water inlet channel, a water distribution channel, at least one anoxic tank, at least one aerobic tank, a water drainage channel and a water drainage pipeline; flushing and draining devices are arranged in each anoxic tank body and each aerobic tank body; a plurality of filler intercepting facilities are vertically arranged in each anoxic tank body; an upper layer of filler fixing facilities and a lower layer of filler fixing facilities are horizontally arranged in each aerobic tank; the structure of the multiple packing interception facilities, the structure of the upper-layer packing fixing facility and the structure of the lower-layer packing fixing facility are all groined grid frameworks with packing blocking nets. The utility model discloses collect biological denitrification, carbonization function in an organic whole, adopt biological filler to improve the biological quantity in the reaction tank to can effectively avoid denitrification gas that biomembrane method exists to block up, the incomplete problem of backwash.
Description
Technical Field
The utility model belongs to the field of environmental protection water treatment, more specifically relates to a serial-type biological denitrification reactor.
Background
The biological denitrification technology is widely applied due to high treatment efficiency, low operation cost and simple and convenient management. In the biological treatment process, the mixture is treated with nitreThe ammonian is converted into nitrate nitrogen in the chemical process, and then the nitrate nitrogen is converted into N by denitrification2Escape into the atmosphere.
Common biological denitrification processes include AO, short-cut nitrification and denitrification and deep bed denitrification filters. The AO process is used as a sewage treatment process which is most widely applied, and total nitrogen and ammonia nitrogen are respectively removed through an anoxic pond and an aerobic pond. The aerobic section is subjected to nitration reaction, and the mixed solution flows back to the anoxic section through the pump to be subjected to denitrification reaction. The structure volume is large, and the total nitrogen removal efficiency is about 60 percent generally.
The principle of short-cut nitrification and denitrification is to control the nitrification reaction to only proceed to NO by utilizing the inherent difference of nitrobacteria and nitrites on the kinetic characteristics2N stage, resulting in a large amount of NO2Accumulation of-N, followed by denitrification. The process reduces the tank volume through high sludge concentration, and has the advantages of saving energy, saving additional carbon source, reducing occupied area and the like compared with the traditional biological denitrification. However, the dissolved oxygen needs to be accurately controlled (generally controlled to be 0.5mg/L) during operation, and the system operation management is complex.
The deep bed denitrification filter tank is a commonly used post denitrification process, adopts quartz sand as a filter material, and has the functions of denitrification and filtration. Is generally used for the total nitrogen advanced treatment of the effluent of the secondary sedimentation tank. The process needs an additional carbon source to provide an electron donor for denitrifying bacteria, and the adding amount of the carbon source needs to be slightly excessive in order to ensure the total nitrogen removal effect. At the moment, in order to ensure that the COD reaches the standard, a decarbonization biological filter unit is added at the rear end for treatment. If ammonia nitrogen needs to be removed, a nitrifying biological filter is added at the front end.
The AO process and the short-cut nitrification and denitrification process are primary biochemical processes, belong to the category of an activated sludge method, and for sewage with high salt content and poor biodegradability, the activated sludge activity is difficult to maintain and cannot keep stable and reliable operation. For sewage with high content of nitrogen compounds, the total nitrogen of treated water can hardly reach the IV-class discharge standard of surface water environmental quality standard (GB 3838-2002).
The deep bed denitrification filter is commonly used as a secondary biochemical process, belongs to the category of biomembrane methods, and can solve the problems of deep treatment and standard discharge of total nitrogen. But the function is single, the ammonia nitrogen can not be synchronously removed, and the COD of the effluent water exceeds the standard due to excessive carbon source addition. For the problem of filter bed gas blockage caused by nitrogen production by denitrification, the backwashing nitrogen-driving effect is poor, and the bed resistance is reduced too much, so that the method is not suitable for occasions with the total nitrogen removal amount more than 10 mg/L.
Therefore, a new biological denitrification reactor is urgently needed to be provided for removing nitrogen compounds in sewage in the industries of petroleum, chemical industry, printing and dyeing, paper making and the like, particularly for removing total nitrogen and CODcr in the sewage.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a serial biological denitrification reactor aiming at the defects of the prior art. The utility model discloses collect biological denitrification, carbonization function in an organic whole, adopt biological filler to improve the biological quantity in the reaction tank to can effectively avoid denitrification gas that biomembrane method exists to block up, the incomplete problem of backwash.
In order to realize the aim, the utility model provides a serial biological denitrification reactor, which comprises a carbon source adding pipeline, a sewage adding pipeline, a water inlet channel, a water distribution channel, at least one anoxic tank, at least one aerobic tank, a water drainage channel and a water drainage pipeline;
the water inlet channel, the water distribution channel, the at least one anoxic tank, the at least one aerobic tank, the water drainage channel and the water drainage pipeline are sequentially connected; the water inlet channel is also connected with the carbon source adding pipeline and the sewage adding pipeline respectively;
flushing and draining devices are arranged in each anoxic tank body and each aerobic tank body;
a plurality of filler intercepting facilities are vertically arranged in each anoxic tank body and are used for fixedly intercepting the fillers in the anoxic tank bodies; a first emptying pipe and water distribution equipment are sequentially arranged at the bottom of each anoxic tank from bottom to top;
an upper layer of filler fixing facilities and a lower layer of filler fixing facilities are horizontally arranged in each aerobic tank body and are used for fixing the fillers in the aerobic tank bodies in the middle parts of the aerobic tank bodies; a liftable aeration device is arranged below the lower layer filler fixing facility; a second emptying pipe is arranged at the bottom of the aerobic tank body below the lifting aeration device;
the structure of the multiple packing interception facilities, the structure of the upper-layer packing fixing facility and the structure of the lower-layer packing fixing facility are all groined grid frameworks with packing blocking nets.
Preferably, the at least one anoxic pond is a plurality of anoxic ponds, and the anoxic ponds are connected in series.
Preferably, the at least one aerobic tank is multiple, and all the aerobic tanks are connected in series.
Preferably, the bottom of the water distribution channel is connected with water distribution equipment arranged at the bottom of the first anoxic pond through a water inlet pipe; a first manual valve is arranged on the water inlet pipe; the other anoxic tanks, the aerobic tanks and the anoxic tank and the aerobic tank connected with the anoxic tank are connected by a clapboard of which the upper part is provided with a flow guide device.
Preferably, the drainage channel is connected with the last aerobic tank through a partition plate with a drainage hole at the upper part.
Preferably, the flow guide device comprises a water through hole, a drainage groove and a drainage tube; the water through hole penetrates through the upper part of the partition board provided with the flow guide device; the drainage groove is connected with the water outlet end of the water through hole; one end of a drainage tube of the anoxic pond provided with the flow guide device is connected with the bottom of the drainage groove, and the other end of the drainage tube is connected with water distribution equipment at the bottom of the anoxic pond provided with the flow guide device; one end of the drainage tube of each aerobic tank is connected with the bottom of the drainage groove, and the other end of the drainage tube of each aerobic tank is close to the bottom of each aerobic tank.
Preferably, the water inlet port department of crossing the water hole is equipped with prevents throwing the material facility, prevent throwing the structure of material facility do lay the # -shaped net skeleton of packing block.
Preferably, the water inlet channel and the water distribution channel are connected through an overflow weir.
Preferably, the drain pipe is connected to the bottom of the drain channel.
Preferably, the flushing drainage device comprises a flushing drainage receiver, a flushing drainage pipe, a flushing air distribution device and a flushing air supply device;
one end of the flushing and draining container is plugged by a blind plate; the other end of the flushing and draining container is provided with a flange and is connected with the flushing and draining pipe for discharging flushing wastewater in the serial biological denitrification reactor; the flushing drain pipe is also provided with a second manual valve and a first automatic valve; the flushing gas distribution equipment is connected with flushing air supply equipment arranged outside the serial biological denitrification reactor through the flushing gas pipe; the flushing air pipe is also provided with a sixth manual valve and a third automatic valve;
in each anoxic tank body, a flushing drainage receiver is arranged in the middle of the anoxic tank body; the flushing gas distribution equipment is arranged at the bottom in the anoxic tank body and is positioned above the water distribution equipment;
in each aerobic tank, a flushing drainage container is arranged in the filler in the aerobic tank; the flushing gas distribution equipment is arranged at a position above the lower-layer filler fixing facility.
Preferably, 2-4 rows of strip-shaped holes are uniformly distributed on the circumferential direction of the pipe wall of the flushing and draining container, the width of each row of strip-shaped holes is 10-20mm, the length of each row of strip-shaped holes is 100-300mm, and the distance between every two strip-shaped holes in each row is 30-50 mm; the caliber of the flushing and draining container is DN100-DN 300; the material of the flushing and draining container is stainless steel or glass fiber reinforced plastic.
Preferably, the flushing gas distribution equipment is a perforated pipe gas distributor, the bottom of the flushing gas distribution equipment is provided with water distribution and gas distribution holes, the hole opening direction is 45 degrees inclined downwards from the right side or 45 degrees inclined downwards from the left side, the hole opening directions are alternately arranged, the interval between each water distribution and gas distribution hole is 50-150mm, and the hole diameter of each water distribution and gas distribution hole is phi 3-5 mm.
Preferably, the number of the plurality of packing intercepting facilities is 2 to 5.
Preferably, the filler in the anoxic tank body is a polyurethane or PVA biological filler, the specific gravity of the filler in the anoxic tank body is less than 1, and the surface of the filler in the anoxic tank body is a inoculated biological membrane.
Preferably, the filler in the aerobic tank body is polyurethane or PVA biological filler.
Preferably, the first emptying pipe is provided with a third manual valve.
Preferably, the second emptying pipe is provided with a fourth manual valve and a second automatic valve.
Preferably, the material of the filler barrier net is a stainless steel net and/or a nylon net, and the aperture of the filler barrier net is 10-20 mm.
Preferably, the material of the # -shaped grid framework is stainless steel and/or glass fiber reinforced plastic, and the side length of the grid of the # -shaped grid framework is 300-500 mm.
Preferably, the liftable aeration device comprises an air trunk, a fifth manual valve, an air vertical pipe, a hose joint, a first hose fixer, a second hose fixer, a liftable microporous hose, a hose guiding fixer, a hose plug, a pool bottom tractor, a pool top tractor, a traction rope retainer, a traction rope, a movable pull ring, a traction bracket and aeration supply equipment;
the aeration supply equipment is arranged outside the serial biological denitrification reactor; one end of the air main pipe is connected with the aeration supply equipment, and the other end of the air main pipe is connected with one end of the fifth manual valve; the other end of the fifth manual valve is connected with one end of the air vertical pipe through a bolt; the air vertical pipe penetrates through a drainage pipe of the aerobic tank, the other end of the air vertical pipe is connected with one end of the hose connector, the other end of the hose connector is fixedly connected with one end of the liftable microporous hose through the first hose fixer, the liftable microporous hose is horizontally fixed at the bottom of the aerobic tank through the hose guide fixer arranged at the bottom of the aerobic tank, the other end of the liftable microporous hose is fixedly connected with one end of the hose plug through the second hose fixer, the other end of the hose plug is connected with one end of the traction rope, and the other end of the traction rope sequentially passes through the tank bottom tractor arranged at the bottom of the side wall of the water outlet side of the aerobic tank, the traction rope guard rings arranged on the upper layer filler fixing facility and the lower layer filler fixing facility and the tank top tractor arranged at the upper part of the side wall of the water outlet side of the aerobic tank, and the movable pull ring is movably connected with the movable pull ring arranged on the traction bracket arranged on the top of the side wall of the water outlet side of the aerobic tank.
The technical scheme of the utility model beneficial effect as follows:
1) the utility model discloses a serial-type bioreactor designs denitrification reaction section (oxygen deficiency pond) and decarbonization reaction section (good oxygen pond) according to sewage quality of water, realizes getting rid of total nitrogen, CODcr simultaneously. Effectively avoiding the problem of COD exceeding caused by excessive carbon source addition, and needing no subsequent decarburization process unit.
2) The utility model discloses load polyurethane or PVA biofilm carrier in the oxygen deficiency pond, the full play biomembrane method advantage improves microorganism quantity in the reactor, can adapt to the sewage condition that contains the salt content height, biodegradability is poor, and the total nitrogen of handling back effluent satisfies "surface water environmental quality standard" (GB 3838-.
3) The denitrification reaction section (anoxic tank) structure of the utility model adopts a fluidized bed (a plurality of filling interception facilities), thereby effectively avoiding the air blockage problem caused by the incomplete denitrification gas production and backwashing of the biomembrane method; the decarbonization reaction section (aerobic tank) adopts a fixed bed (an upper layer filler fixing facility and a lower layer filler fixing facility) to ensure the high-efficiency removal of CODcr and SS.
4) The utility model discloses a denitrification reaction section (oxygen deficiency pond) establishes multichannel filler interception facility and water distribution equipment, has effectively solved the fluidized bed filler toward the problem that the water side is piled up, rivers short flow.
5) The aeration in the decarburization reaction section (aerobic tank) of the utility model adopts the lifting aeration hose to realize the non-stop on-line maintenance of the aerator.
6) The utility model discloses to wash the middle part that the drainage receiver position was adjusted to every oxygen deficiency cell body and every good oxygen cell body from the packing layer top to adopt the bar hole to increase the water area, the accessible falls the liquid level and makes in every oxygen deficiency cell body and the packing layer in every good oxygen cell body descend when washing, has increased the relative motion between the stage of washing filler, has improved the flushing effect and has driven nitrogen effect.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 shows a schematic structural diagram of a serial biological denitrification reactor provided by the utility model.
Fig. 2 shows a schematic structural diagram of a liftable aeration device in an aerobic tank of a serial biological denitrification reactor provided by the utility model.
Fig. 3 shows a schematic structural diagram of a flushing and draining container of a flushing and draining device of a serial biological denitrification reactor provided by the utility model.
The reference numerals are explained below:
1-water inlet channel; 2-distributing the canal; 3-an anoxic tank; 4-an aerobic tank; 5-a drainage channel; 6-a drainage pipeline; 7-carbon source feeding pipeline; 8-sewage feeding pipeline; 10-a filler interception facility; 11-a first blow-down pipe; 12-water distribution equipment; 13-upper layer filler fixing facilities; 14-lower layer filler fixing facilities; 15-lifting aeration device; 16-a second blow-down pipe; 17-a water inlet pipe; 18-a first manual valve; 19-a drain hole; 20-water through holes; 21-a drainage groove; 22-a drainage tube; 24-anti-throwing facilities; 25-an overflow weir; 26-a flush drain receptacle; 27-flushing the drain pipe; 28-flushing trachea; 29-flushing gas distribution equipment; 30-flush air supply; 31-a second manual valve; 32-a first automatic valve; 33-strip-shaped holes; 34-a third manual valve; 35-a fourth manual valve; 36-a second automatic valve; 37-air dry pipe; 38-fifth manual valve; 39-air riser; 40-hose connection; 41-a first hose retainer; 42-a second hose retainer; 43-liftable microporous hose; 44-hose guide holder; 45-hose plug; 46-a pool bottom tractor; 47-pool top tractor; 48-a leash retainer; 49-a hauling rope; 50-a movable pull ring; 51-a traction support; 52-aeration supply means; 53-blind plate plugging; 54-a flange; 55-a sixth manual valve; 56-third automatic valve.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The utility model provides a serial biological denitrification reactor, which comprises a carbon source adding pipeline, a sewage adding pipeline, a water inlet channel, a water distribution channel, at least one anoxic tank, at least one aerobic tank, a drainage channel and a drainage pipeline;
the water inlet channel, the water distribution channel, the at least one anoxic tank, the at least one aerobic tank, the water drainage channel and the water drainage pipeline are sequentially connected; the water inlet channel is also connected with the carbon source adding pipeline and the sewage adding pipeline respectively;
flushing and draining devices are arranged in each anoxic tank body and each aerobic tank body;
a plurality of filler intercepting facilities are vertically arranged in each anoxic tank body and are used for fixedly intercepting the fillers in the anoxic tank bodies; a first emptying pipe and water distribution equipment are sequentially arranged at the bottom of each anoxic tank from bottom to top; the utility model discloses in, utilize water distribution equipment realizes the uniform water distribution, avoids short flowing.
An upper layer of filler fixing facilities and a lower layer of filler fixing facilities are horizontally arranged in each aerobic tank body and are used for fixing the fillers in the aerobic tank bodies in the middle parts (fixed beds) in the aerobic tank bodies; a liftable aeration device is arranged below the lower layer filler fixing facility; a second emptying pipe is arranged at the bottom of the aerobic tank body below the lifting aeration device;
the structure of the multiple packing interception facilities, the structure of the upper-layer packing fixing facility and the structure of the lower-layer packing fixing facility are all groined grid frameworks with packing blocking nets.
The utility model discloses in, the carbon source is thrown and is thrown the pipeline and be used for throwing the required carbon source of denitrification reaction.
In one example, the at least one anoxic tank is a plurality of anoxic tanks, and the anoxic tanks are connected in series. The number of the at least one aerobic tank is multiple, and all the aerobic tanks are connected in series. The bottom of the water distribution channel is connected with water distribution equipment arranged at the bottom of the first anoxic tank through a water inlet pipe; a first manual valve is arranged on the water inlet pipe; the other anoxic tanks, the aerobic tanks and the anoxic tank and the aerobic tank connected with the anoxic tank are connected by a clapboard of which the upper part is provided with a flow guide device. The drainage channel is connected with the last aerobic tank through a partition plate with a drainage hole at the upper part.
In one example, the flow guide device comprises a water through hole, a drainage groove and a drainage tube; the water through hole penetrates through the upper part of the partition board provided with the flow guide device; the drainage groove is connected with the water outlet end of the water through hole; one end of a drainage tube of the anoxic pond provided with the flow guide device is connected with the bottom of the drainage groove, and the other end of the drainage tube is connected with water distribution equipment at the bottom of the anoxic pond provided with the flow guide device; one end of the drainage tube of each aerobic tank is connected with the bottom of the drainage groove, and the other end of the drainage tube of each aerobic tank is close to the bottom of each aerobic tank.
The utility model discloses in, according to above-mentioned mode, sewage is by lower supreme in each oxygen deficiency pond and good oxygen pond rivers direction, gets into the drainage canal until last good oxygen pond upper portion wash port, through the drainage pipe discharge serial-type biological denitrification reactor of drainage canal bottom.
In one example, the water inlet port of the water through hole is provided with a material throwing prevention facility, and the material throwing prevention facility is structurally a # -shaped grid framework for laying a filler block net. Avoid the filler to enter the next reaction tank.
In one example, the inlet channel and the distribution channel are connected by an overflow weir.
In one example, the drain line is connected to a bottom of the drain channel.
In one example, the flush drain includes a flush drain receptacle, a flush drain pipe, a flush air tube, a flush air distribution apparatus, and a flush air supply apparatus;
one end of the flushing and draining container is plugged by a blind plate; the other end of the flushing and draining container is provided with a flange and is connected with the flushing and draining pipe for discharging flushing wastewater in the serial biological denitrification reactor; the flushing drain pipe is also provided with a second manual valve and a first automatic valve; the flushing gas distribution equipment is connected with flushing air supply equipment arranged outside the serial biological denitrification reactor through the flushing gas pipe; the flushing air pipe is also provided with a sixth manual valve and a third automatic valve;
in each anoxic tank body, a flushing drainage receiver is arranged in the middle of the anoxic tank body; the flushing gas distribution equipment is arranged at the bottom in the anoxic tank body and is positioned above the water distribution equipment;
in each aerobic tank, a flushing drainage container is arranged in the filler in the aerobic tank; the flushing gas distribution equipment is arranged at a position above the lower-layer filler fixing facility.
In one example, 2-4 rows of strip-shaped holes are uniformly distributed on the circumferential direction of the pipe wall of the flushing and draining container, the width of each row of strip-shaped holes is 10-20mm, the length of each row of strip-shaped holes is 100-300mm, and the distance between every two strip-shaped holes in each row is 30-50 mm; the caliber of the flushing and draining container is DN100-DN 300; the material of the flushing and draining container is stainless steel or glass fiber reinforced plastic.
In one example, the flushing gas distribution equipment is a perforated pipe gas distributor, the bottom of the flushing gas distribution equipment is provided with water distribution and gas distribution holes, the hole opening direction is 45 degrees inclined downwards from the right side or 45 degrees inclined downwards from the left side, the hole opening direction is alternately arranged, the interval between the water distribution and gas distribution holes is 50-150mm, and the hole diameter of each water distribution and gas distribution hole is phi 3-5 mm.
In one example, the number of the plurality of filling material intercepting facilities is 2-5, and the filling materials in the anoxic tank body are intercepted in a fixed area in the anoxic tank in a segmented mode, so that short flow caused by the accumulation of the filling materials towards the water outlet side is avoided.
In one example, the filler in the anoxic tank body is polyurethane or PVA biological filler, the specific gravity of the filler in the anoxic tank body is less than 1, the filler becomes a floating state in sewage and floats on the water surface (is a fluidized bed) in an interval formed by a plurality of filler intercepting facilities; the surface of the filler in the anoxic tank body is a inoculated biological membrane.
In one example, the filler in the aerobic tank is a polyurethane or PVA biofilm filler.
In one example, a third manual valve is disposed on the first blow-down pipe.
In one example, a fourth manual valve and a second automatic valve are disposed on the second flare.
In one example, the material of the filler barrier net is a stainless steel net and/or a nylon net, and the pore diameter of the filler barrier net is 10-20 mm.
In one example, the material of the # -shaped grid framework is stainless steel and/or glass fiber reinforced plastic, and the side length of the grid of the # -shaped grid framework is 300-500 mm.
In one example, the liftable aeration device comprises an air trunk, a fifth manual valve, an air riser, a hose connector, a first hose retainer, a second hose retainer, a liftable microporous hose, a hose guide retainer, a hose stopper, a pool bottom tractor, a pool top tractor, a hauling rope retainer, a hauling rope, a movable pull ring, a hauling bracket and an aeration supply apparatus;
the aeration supply equipment is arranged outside the serial biological denitrification reactor; one end of the air main pipe is connected with the aeration supply equipment, and the other end of the air main pipe is connected with one end of the fifth manual valve; the other end of the fifth manual valve is connected with one end of the air vertical pipe through a bolt; the air vertical pipe penetrates through a drainage pipe of the aerobic tank, the other end of the air vertical pipe is connected with one end of the hose connector, the other end of the hose connector is fixedly connected with one end of the liftable microporous hose through the first hose fixer, the liftable microporous hose is horizontally fixed at the bottom of the aerobic tank through the hose guide fixer arranged at the bottom of the aerobic tank, the other end of the liftable microporous hose is fixedly connected with one end of the hose plug through the second hose fixer, the other end of the hose plug is connected with one end of the traction rope, and the other end of the traction rope sequentially passes through the tank bottom tractor arranged at the bottom of the side wall of the water outlet side of the aerobic tank, the traction rope guard rings arranged on the upper layer filler fixing facility and the lower layer filler fixing facility and the tank top tractor arranged at the upper part of the side wall of the water outlet side of the aerobic tank, and the movable pull ring is movably connected with the movable pull ring arranged on the traction bracket arranged on the top of the side wall of the water outlet side of the aerobic tank.
The utility model discloses in, swing joint's mode can be for on the activity pull ring with the other end ligature on pulling the support of haulage rope.
The utility model discloses in, be fixed in as the level when the liftable micro porous hose of good oxygen bottom of the pool portion need be overhauld or change, demolish the bolt on the fifth manual valve, untie the haulage rope of ligature on the activity pull ring, can upwards take out air riser, liftable micro porous hose this moment, overhaul or change. After the completion, the liftable microporous hose is fixed at the bottom of the pool again by pulling the traction rope at the other side, and finally, the bolt on the manual valve is installed and the traction rope is bound on the movable pull ring on the traction bracket. Therefore, the aerator is overhauled on line without stopping the vehicle.
The present invention will be described in detail with reference to examples.
Example 1
The present embodiment provides a serial biological denitrification reactor, as shown in fig. 1-3, the reactor includes a carbon source feeding pipeline 7, a sewage feeding pipeline 8, a water inlet channel 1, a water distribution channel 2, two anoxic tanks 3, two aerobic tanks 4 (only 1 aerobic tank 4 is shown in fig. 1), a water discharge channel 5 and a water discharge pipeline 6;
the water inlet channel 1, the water distribution channel 2, the two anoxic tanks 3, the two aerobic tanks 4, the drainage channel 5 and the drainage pipeline 6 are sequentially connected;
3 filling material intercepting facilities 10 are vertically arranged in each anoxic tank 3 and used for fixedly intercepting filling materials in the anoxic tank 3, the filling materials in the anoxic tank 3 are PVA biological filling materials, the specific gravity of the filling materials in the anoxic tank 3 is less than 1, and the surface of the filling materials in the anoxic tank 3 is an inoculated biological membrane; the bottom of each anoxic tank 3 is sequentially provided with a first emptying pipe 11 and a water distribution device 12 from bottom to top; a third manual valve 34 is arranged on the first emptying pipe 11;
an upper-layer filler fixing facility 13 and a lower-layer filler fixing facility 14 are horizontally arranged in each aerobic tank body 4 and are used for fixing the fillers in the aerobic tank body 4 in the middle of the aerobic tank body 4, and the fillers in the aerobic tank body 4 are PVA biological fillers; a liftable aeration device 15 is arranged below the lower-layer filler fixing facility 14; a second emptying pipe 16 is arranged at the bottom of the aerobic tank 4 below the liftable aeration device 15, and a fourth manual valve 35 and a second automatic valve 36 are arranged on the second emptying pipe 16;
flushing and draining devices are arranged in each anoxic tank 3 and each aerobic tank 4; the flushing drainage device comprises a flushing drainage container 26, a flushing drainage pipe 27, a flushing air pipe 28, a flushing air distribution device 29 and a flushing air supply device 30; one end of the flushing and draining container 26 is a blind plate plug 53; the other end of the flushing and draining container 26 is provided with a flange 54, is connected with the flushing and draining pipe 27 and is used for discharging flushing wastewater in the serial biological denitrification reactor; the flushing drain pipe 27 is also provided with a second manual valve 31 and a first automatic valve 32; the flushing gas distribution equipment 30 is connected with flushing air supply equipment 30 arranged outside the serial biological denitrification reactor through the flushing gas pipe 28; the flushing air pipe 28 is also provided with a sixth manual valve 55 and a third automatic valve 56;
in each anoxic tank 3, a flushing drainage receiver 26 is arranged in the middle of the anoxic tank 3; the flushing gas distribution equipment 29 is arranged at the bottom in the anoxic tank 3 and is positioned above the water distribution equipment 12;
in each aerobic tank 4, a flushing drainage receiver 26 is arranged in the filler in the aerobic tank 4; a flushing and gas distribution device 29 is arranged at a position above the lower packing fixture 14.
3 rows of strip-shaped holes 33 are uniformly distributed on the circumferential direction of the pipe wall of the flushing and draining container 26, the hole width of each row of strip-shaped holes 33 is 10mm, the length of each row of strip-shaped holes 33 is 200mm, and the distance between every two strip-shaped holes 33 in each row is 30 mm; the caliber of the flushing and draining container 26 is DN 200; the material of the flushing drain receiver 26 is stainless steel.
The flushing gas distribution equipment 29 is a perforated pipe gas distributor, the bottom of which is provided with water distribution and gas distribution holes, the hole opening direction is 45 degrees inclined downwards from the right side or 45 degrees inclined downwards from the left side, the hole opening directions are alternately arranged, the interval between the water distribution and gas distribution holes is 100mm, and the hole diameter of each water distribution and gas distribution hole is phi 3 mm.
The inlet channel 1, join in marriage ditch 2, two oxygen deficiency ponds 3, two good oxygen ponds 4, drainage canal 5 and drainage pipe 6 and connect gradually, specifically do:
the water inlet channel 1 is connected with the water distribution channel 2 through an overflow weir 25; the water inlet channel 1 is also respectively connected with the carbon source adding pipeline 7 and the sewage adding pipeline 8;
the two anoxic tanks 3 are connected in series; the two aerobic tanks 4 are connected in series;
the bottom of the water distribution channel 2 is connected with water distribution equipment 12 arranged at the bottom of the first anoxic pond 3 through a water inlet pipe 1; a first manual valve 18 is arranged on the water inlet pipe 17;
the two aerobic tanks 4, the aerobic tank 4 arranged on the first side and the anoxic tank 3 arranged on the second side are connected through a partition board with a flow guide device at the upper part; the flow guide device comprises a water through hole 20, a drainage groove 21 and a drainage tube 22; the water through hole 20 penetrates through the upper part of the partition board provided with the flow guide device; the drainage groove 21 is connected with the water outlet end of the water through hole 20; one end of a drainage tube 22 of the anoxic pond 3 provided with the flow guide device is connected with the bottom of the drainage groove 21, and the other end of the drainage tube is connected with the water distribution equipment 12 at the bottom of the anoxic pond 3 provided with the flow guide device; one end of the drainage pipe 22 of each aerobic tank 4 is connected with the bottom of the drainage groove 21, and the other end of the drainage pipe is close to the bottom of each aerobic tank 4; and a material throwing prevention facility 24 is arranged at the water inlet port of the water passing hole 20. The structure of the 3 filler intercepting facilities 10, the structure of the upper filler fixing facility 13, the structure of the lower filler fixing facility 14 and the structure of the material throwing prevention facility 24 are all groined grid frameworks (not shown) for laying filler blocking nets. The material of the filler blocking net (not shown) in the # -shaped grid framework for laying the filler blocking net is a stainless steel net, and the aperture of the filler blocking net is 15 mm; the # -shaped grid framework (not shown) is made of stainless steel, and the side length of the grid of the # -shaped grid framework is 300 mm.
The drainage channel 5 is connected with the aerobic pool 4 arranged on the second through a partition plate with a drainage hole 19 at the upper part;
the drainage pipeline 6 is connected with the bottom of the drainage channel 5.
The liftable aeration device 15 comprises an air trunk pipe 37, a fifth manual valve 38, an air vertical pipe 39, a hose joint 40, a first hose fixer 41, a second hose fixer 42, a liftable microporous hose 43, a hose guiding fixer 44, a hose stopper 45, a pool bottom tractor 46, a pool top tractor 47, a traction rope retainer 48, a traction rope 49, a movable pull ring 50, a traction bracket 51 and aeration supply equipment 52;
the aeration supply device 52 is arranged outside the serial biological denitrification reactor; one end of the air trunk pipe 37 is connected to the aeration supply means 52, and the other end is connected to one end of the fifth manual valve 38; the other end of the fifth manual valve 38 is connected with one end of the air vertical pipe 39 through a bolt; the air vertical pipe 39 passes through the drainage pipe 22 of the aerobic tank 4, the other end of the air vertical pipe is connected with one end of the hose connector 40, the other end of the hose connector 40 is fixedly connected with one end of the liftable microporous hose 43 through the first hose fixer 41, the liftable microporous hose 43 is horizontally fixed at the bottom of the aerobic tank 4 through the hose guide fixer 44 arranged at the bottom of the aerobic tank 4, the other end of the liftable microporous hose 43 is fixedly connected with one end of the hose plug 45 through the second hose fixer 42, the other end of the hose plug 45 is connected with one end of the traction rope 49, and the other end of the traction rope 49 sequentially passes through the tank bottom tractor 46 arranged at the bottom of the side wall at the outlet side of the aerobic tank 4, the traction rope retainer 48 arranged on the upper filler fixing device 13 and the lower filler fixing device 14 and the traction rope retainer 48 arranged at the upper part of the side wall at the outlet side of the aerobic tank 4 The pool top tractor 47 is movably connected with the movable pull ring 50 arranged on the traction bracket 51 arranged on the top of the side wall of the water outlet side of the aerobic pool 4.
In an embodiment, when the liftable microporous hose 43 horizontally fixed at the bottom of the aerobic tank 4 needs to be repaired or replaced, the bolt on the fifth manual valve 38 is removed, the pulling rope 49 tied on the movable pulling ring 50 is untied, and the air vertical pipe 39 and the liftable microporous hose 43 can be taken out upwards for repair or replacement. After completion, the liftable microporous hose 43 is fixed to the bottom of the tank again by pulling the pulling rope 49 at the other side, and finally the bolt on the fifth manual valve 38 is installed, and the pulling rope 49 is tied to the movable pulling ring 50 on the pulling bracket 51. Therefore, the online maintenance without stopping the vehicle of the aeration device 15 can be improved.
The serial biological denitrification reactor of the embodiment is used for treating the effluent of the advanced oxidation unit of a sewage treatment plant of a certain industrial park (CODcr is 52.56mg/L, NH)3And treating the wastewater at the temperature of 25-35 ℃ with the-N of 0.54mg/L, the total nitrogen of 18.32mg/L and the pH of 6-9, and lifting the wastewater to the serial biological denitrification reactor of the embodiment through a lifting pump and the sewage feeding pipeline 8, wherein the contact and residence time of the filler in the anoxic section is 2 hours, and the contact and residence time of the filler in the aerobic section is 2 hours. In the anoxic section, sodium acetate solution is used as a supplementary carbon source, the adding amount is 94mg/L, and the sodium acetate solution is added into the serial biological denitrification reactor through the carbon source adding pipeline 7. The aeration gas-water ratio of the aerobic section is 2.5: 1.
The effluent quality of the advanced oxidation unit of the sewage treatment plant of the certain industrial park, the effluent quality and the removal rate after treatment by the serial biological denitrification reactor of the embodiment are shown in the table 1. As shown in Table 1, the wastewater treated by the serial biological denitrification reactor of the embodiment has CODcr concentration of 23.25mg/L and total nitrogen concentration of 1.04mg/L, and reaches the IV-class discharge standard of environmental quality Standard for surface Water (GB 3838-2002).
TABLE 1
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A serial biological denitrification reactor is characterized in that the reactor comprises a carbon source adding pipeline, a sewage adding pipeline, a water inlet channel, a water distribution channel, at least one anoxic tank, at least one aerobic tank, a water drainage channel and a water drainage pipeline;
the water inlet channel, the water distribution channel, the at least one anoxic tank, the at least one aerobic tank, the water drainage channel and the water drainage pipeline are sequentially connected; the water inlet channel is also connected with the carbon source adding pipeline and the sewage adding pipeline respectively;
flushing and draining devices are arranged in each anoxic tank body and each aerobic tank body;
a plurality of filler intercepting facilities are vertically arranged in each anoxic tank body and are used for fixedly intercepting the fillers in the anoxic tank bodies; a first emptying pipe and water distribution equipment are sequentially arranged at the bottom of each anoxic tank from bottom to top;
an upper layer of filler fixing facilities and a lower layer of filler fixing facilities are horizontally arranged in each aerobic tank body and are used for fixing the fillers in the aerobic tank bodies in the middle parts of the aerobic tank bodies; a liftable aeration device is arranged below the lower layer filler fixing facility; a second emptying pipe is arranged at the bottom of the aerobic tank body below the lifting aeration device;
the structure of the multiple packing interception facilities, the structure of the upper-layer packing fixing facility and the structure of the lower-layer packing fixing facility are all groined grid frameworks with packing blocking nets.
2. The in-line biological denitrification reactor according to claim 1,
the anoxic tanks are connected in series;
all the aerobic tanks are connected in series;
the bottom of the water distribution channel is connected with water distribution equipment arranged at the bottom of the first anoxic tank through a water inlet pipe; a first manual valve is arranged on the water inlet pipe; the anoxic tanks arranged behind the first anoxic tank, the aerobic tanks and the anoxic tank and the aerobic tank connected with the anoxic tank are connected through partition plates of which the upper parts are provided with flow guide devices;
the drainage channel is connected with the last aerobic tank through a partition plate with a drainage hole at the upper part.
3. The in-line biological denitrification reactor according to claim 2, wherein the flow guide device comprises a water through hole, a drainage groove and a drainage tube; the water through hole penetrates through the upper part of the partition board provided with the flow guide device; the drainage groove is connected with the water outlet end of the water through hole; one end of a drainage tube of the anoxic pond provided with the flow guide device is connected with the bottom of the drainage groove, and the other end of the drainage tube is connected with water distribution equipment at the bottom of the anoxic pond provided with the flow guide device; one end of the drainage tube of each aerobic tank is connected with the bottom of the drainage groove, and the other end of the drainage tube of each aerobic tank is close to the bottom of each aerobic tank;
the water inlet port department of crossing the water hole is equipped with prevents throwing the material facility, prevent throwing the structure of material facility do lay the groined type net skeleton of filler block.
4. The in-line biological denitrification reactor according to any one of claims 1 to 3,
the water inlet channel is connected with the water distribution channel through an overflow weir;
the drainage pipeline is connected with the bottom of the drainage channel.
5. The in-line biological nitrogen removal reactor according to claim 1, wherein the flushing drain device comprises a flushing drain receiver, a flushing drain pipe, a flushing air distribution device and a flushing air supply device;
one end of the flushing and draining container is plugged by a blind plate; the other end of the flushing and draining container is provided with a flange and is connected with the flushing and draining pipe for discharging flushing wastewater in the serial biological denitrification reactor; the flushing drain pipe is also provided with a second manual valve and a first automatic valve; the flushing gas distribution equipment is connected with flushing air supply equipment arranged outside the serial biological denitrification reactor through the flushing gas pipe; the flushing air pipe is also provided with a sixth manual valve and a third automatic valve;
in each anoxic tank body, a flushing drainage receiver is arranged in the middle of the anoxic tank body; the flushing gas distribution equipment is arranged at the bottom in the anoxic tank body and is positioned above the water distribution equipment;
in each aerobic tank, a flushing drainage container is arranged in the filler in the aerobic tank; the flushing gas distribution equipment is arranged at a position above the lower-layer filler fixing facility.
6. The serial biological denitrification reactor as claimed in claim 5, wherein the tube wall of the flushing and draining container is circumferentially and uniformly provided with 2-4 rows of strip-shaped holes, the width of each row of strip-shaped holes is 10-20mm, the length of each row of strip-shaped holes is 100-300mm, and the distance between each strip-shaped hole in each row is 30-50 mm; the caliber of the flushing and draining container is DN100-DN 300; the material of the flushing and draining container is stainless steel or glass fiber reinforced plastic.
7. The in-line biological denitrification reactor according to claim 5, wherein the flushing gas distributor is a perforated pipe gas distributor with water distribution and gas distribution holes on the bottom, the hole opening direction is 45 degrees inclined downwards from the right side or 45 degrees inclined downwards from the left side, the hole opening directions are alternately arranged, the interval between the water distribution and gas distribution holes is 50-150mm, and the hole diameter of each water distribution and gas distribution hole is phi 3-5 mm.
8. The in-line biological denitrification reactor according to claim 1,
the number of the plurality of filling material intercepting facilities is 2-5;
the filler in the anoxic tank body is polyurethane or PVA biological filler, the specific gravity of the filler in the anoxic tank body is less than 1, and the surface of the filler in the anoxic tank body is an inoculated biological membrane;
the filler in the aerobic tank is polyurethane or PVA biological filler;
a third manual valve is arranged on the first emptying pipe;
and a fourth manual valve and a second automatic valve are arranged on the second emptying pipe.
9. The in-line biological denitrification reactor according to claim 1 or 5,
the filler blocking net is made of a stainless steel net and/or a nylon net, and the aperture of the filler blocking net is 10-20 mm;
the material of the # -shaped grid framework is stainless steel and/or glass fiber reinforced plastic, and the side length of the grid of the # -shaped grid framework is 300-500 mm.
10. The in-line biological denitrification reactor of claim 1 wherein the liftable aeration device comprises an air main, a fifth manual valve, an air riser, a hose connector, a first hose retainer, a second hose retainer, a liftable microporous hose, a hose guide retainer, a hose stopper, a pool bottom tractor, a pool top tractor, a hauling rope retainer, a hauling rope, a movable pull ring, a hauling bracket and an aeration supply apparatus;
the aeration supply equipment is arranged outside the serial biological denitrification reactor; one end of the air main pipe is connected with the aeration supply equipment, and the other end of the air main pipe is connected with one end of the fifth manual valve; the other end of the fifth manual valve is connected with one end of the air vertical pipe through a bolt; the air vertical pipe penetrates through a drainage pipe of the aerobic tank, the other end of the air vertical pipe is connected with one end of the hose connector, the other end of the hose connector is fixedly connected with one end of the liftable microporous hose through the first hose fixer, the liftable microporous hose is horizontally fixed at the bottom of the aerobic tank through the hose guide fixer arranged at the bottom of the aerobic tank, the other end of the liftable microporous hose is fixedly connected with one end of the hose plug through the second hose fixer, the other end of the hose plug is connected with one end of the traction rope, and the other end of the traction rope sequentially passes through the tank bottom tractor arranged at the bottom of the side wall of the water outlet side of the aerobic tank, the traction rope guard rings arranged on the upper layer filler fixing facility and the lower layer filler fixing facility and the tank top tractor arranged at the upper part of the side wall of the water outlet side of the aerobic tank, and the movable pull ring is movably connected with the movable pull ring arranged on the traction bracket arranged on the top of the side wall of the water outlet side of the aerobic tank.
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| CN202121446409.8U CN214528321U (en) | 2021-06-28 | 2021-06-28 | Tandem type biological denitrification reactor |
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| CN202121446409.8U CN214528321U (en) | 2021-06-28 | 2021-06-28 | Tandem type biological denitrification reactor |
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