CN111217446B - High-efficient good oxygen biological fluidized bed reactor - Google Patents

High-efficient good oxygen biological fluidized bed reactor Download PDF

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CN111217446B
CN111217446B CN201911199095.3A CN201911199095A CN111217446B CN 111217446 B CN111217446 B CN 111217446B CN 201911199095 A CN201911199095 A CN 201911199095A CN 111217446 B CN111217446 B CN 111217446B
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zone
aerobic
phase separation
anoxic
reactor
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CN111217446A (en
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陈小光
王延林
周伟竹
宋奇
张益榛
任志鹏
罗雨忻
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Donghua University
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Donghua University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds

Abstract

The invention relates to a high-efficiency aerobic biological fluidized bed reactor which is characterized by comprising a reaction zone and an activated sludge settling zone positioned above the reaction zone, wherein: the reaction zone comprises a second anoxic zone, an aerobic zone and a first anoxic zone which are sequentially arranged from bottom to top; one side of the lower part of the second anoxic zone is communicated with the sludge discharge pipe and the water inlet pipe, and the other side of the lower part of the second anoxic zone is communicated with the manhole; the aerobic zone is separated from the first anoxic zone and the second anoxic zone by the separation and guide pipe; the activated sludge settling zone includes a first settling chamber and a second settling chamber. Compared with the traditional aerobic biological fluidized bed reactor, the aerobic decarbonization, anoxic denitrification and sludge precipitation are integrated, the aerobic biological fluidized bed reactor has the advantages of compact structure, small occupied area, high volume load, good mass transfer effect, strong impact load resistance and the like, and is particularly suitable for the reconstruction and extension engineering of sewage treatment of small and medium-sized enterprises.

Description

High-efficient good oxygen biological fluidized bed reactor
Technical Field
The invention relates to the field of organic wastewater treatment, in particular to a high-efficiency aerobic biological fluidized bed reactor.
Background
With the continuous promotion of the industrialization process, the discharge amount of industrial wastewater is increased year by year. According to the records of 'annual book of Chinese environmental statistics', the discharge amount of industrial wastewater in the whole country in 2015 is up to 199.5 hundred million tons, wherein the discharge amount of Chemical Oxygen Demand (COD) is up to 293.5 ten thousand tons, and the discharge amount of ammonia nitrogen is up to 21.7 ten thousand tons. In recent years, the discharge amount of wastewater is reduced, but the base number is still large, and the development of high-efficiency treatment equipment technology is urgently needed. The COD content of the high-concentration organic wastewater is generally above 2000mg/LSometimes even as high as tens of thousands or even hundreds of thousands, and the BOD content is low, the biodegradability is poor, the water body is easy to lack of oxygen, the direct discharge can cause serious damage to the natural water body, and the physical health of people is directly or indirectly influenced. General conventional wastewater treatment techniques, e.g. A2the/O, oxidation ditch and the like have the defects of large occupied area, low operation load, high operation cost and the like when being applied to the treatment of the wastewater. The aerobic biological fluidized bed reactor can lead microorganisms to be in a fluidized state under the action of external power aeration, adsorb and degrade bed pollutants, mineralize organic substrates and achieve the aim of removing organic pollutants.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to improve the efficiency of the aerobic biological fluidized bed, the material distribution is uniform, the interphase mass transfer effect is good, the organic load is high, the impact resistance is strong, the denitrification effect is good, the treatment efficiency is high, the hydraulic retention time is short, and the occupied area is small.
In order to solve the technical problem, the technical scheme of the invention is to provide a high-efficiency aerobic biological fluidized bed reactor, which is characterized by comprising a reaction zone and an activated sludge settling zone positioned above the reaction zone, wherein:
the reaction zone comprises a second anoxic zone, an aerobic zone and a first anoxic zone which are sequentially arranged from bottom to top; one side of the lower part of the second anoxic zone is communicated with the sludge discharge pipe and the water inlet pipe, and the other side of the lower part of the second anoxic zone is communicated with the manhole;
the aerobic zone is separated from the first anoxic zone and the second anoxic zone by a separation and diversion pipe, an aeration main pipe is arranged in the aerobic zone, the top end of the aeration main pipe extends out of the reactor through the activated sludge settling zone, the bottom end of the aeration main pipe is communicated with a plurality of circular aeration branch pipes, a disc-type aeration disc is arranged on each circular aeration branch pipe, and all disc-type aeration discs are uniformly distributed in the middle of the separation and diversion pipe;
the activated sludge settling zone comprises a first settling chamber and a second settling chamber; a first three-phase separator baffle surrounding the separation and flow guide pipe is arranged above the top of the separation and flow guide pipe, a second three-phase separation baffle and a third three-phase separation baffle surround the first three-phase separator baffle, and the second three-phase separation baffle is connected with the inner wall of the reactor; the first settling chamber is positioned among the first three-phase separator baffle, the second three-phase separator baffle and the third three-phase separator baffle; the second settling chamber is positioned between the three-phase separation baffle II, the three-phase separation baffle III and the inner wall of the reactor; the three tops of the three-phase separation baffle are embedded with a rhombic overflow weir, the lower part of the rhombic overflow weir is externally connected with a liquid receiving disc, the top of the liquid receiving disc is provided with a defoaming disc and a sawtooth overflow weir, and the side edge of the liquid receiving disc is communicated with a water outlet pipe penetrating through the outer wall of the reactor.
Preferably, the volume V of the reaction zoneReaction zoneVolume V of the activated sludge settling zoneSettling zoneVolume ratio of VSettling zone:V Reaction zone1, (4-6); volume V of the aerobic zoneAerobic zoneAnd the volume V of the anoxic zone consisting of the first anoxic zone and the second anoxic zoneAnoxic zoneVolume ratio of VAerobic zone:VAnoxic zone＝1:(1～3)。
Preferably, the separation and flow guide pipe is formed by connecting a hollow regular splayed cone body and a cylinder up and down, and the included angle between the regular splayed cone body and the cylinder is 120-150 degrees.
Preferably, the aeration main pipe is connected to the top of the reactor, and the height of the disc type aeration disc is adjustable.
Preferably, the first settling chamber has a surface load of q1The surface load of the second precipitation chamber is q2，q1≈q2＝(0.25～0.59)m3/(m2·h)。
Preferably, the first three-phase separation baffle is formed by connecting a hollow cylinder and a regular splayed cone, and the included angle is 90-180 degrees; the three-phase separation baffle II is an inverted splayed cone connected with the inner wall of the reactor, and the included angle between the inverted splayed cone and the inner wall of the reactor is 0-90 degrees; the three-phase separation baffle III is formed by connecting a cylinder and a regular splayed cone, and the included angle is 90-180 degrees.
Preferably, the ratio of the diameter D1 of the cylinder of the first three-phase separation baffle to the diameter D2 of the cylinder of the third three-phase separation baffle is D1: D2: 1 (2-3).
Compared with the traditional aerobic biological fluidized bed reactor, the aerobic decarbonization, anoxic denitrification and sludge precipitation integrated reactor has the advantages of compact structure, small occupied area, high volume load, good mass transfer effect, strong impact load resistance and the like, is particularly suitable for the reconstruction and expansion engineering of sewage treatment of small and medium-sized enterprises, and has the following characteristics:
(1) the invention integrates the reaction zone and the activated sludge settling zone into a whole, has high integration, can simultaneously realize aerobic decarburization and nitrification, anoxic denitrification and sludge settling, and has the advantages of small occupied area, low energy consumption and good effect.
(2) The aeration pipe is connected from the top of the reactor, so that the head loss can be reduced; the height of the aeration disc is adjustable, the volume ratio of the aerobic zone to the anoxic zone can be adjusted according to the running condition, and the denitrification effect is controllable.
(3) The invention is internally provided with the separation and guide pipe which separates the aerobic zone and the anoxic zone and guides the fluid in the reactor to form a full mixing flow state, thereby generating vortex, reducing dead zones and strengthening the interphase mass transfer rate.
(4) The invention is provided with three-phase separation baffles to form a double-precipitation chamber, thereby enhancing the three-phase separation capability and the sludge retention capability.
(5) The invention overflows from the rhombic overflow weir to realize central water outlet and improve flow state, and is additionally provided with the sawtooth overflow weir to realize multi-position overflow, reduce short flow of a settling zone and promote uniform water outlet.
(6) The invention is provided with a defoaming plate at the liquid receiving plate to remove foam and suspended matters in the effluent.
(7) The water inlet of the invention is arranged in the second anoxic zone to provide sufficient carbon source for denitrification.
(8) The sludge discharge port of the invention is slightly inclined downwards, thus reducing the sludge resistance, preventing blockage and ensuring smooth sludge discharge.
Drawings
FIG. 1 is a schematic structural diagram of a high-efficiency aerobic biological fluidized bed reactor provided by the invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
As shown in figure 1, the high-efficiency aerobic biological fluidized bed reactor provided by the invention comprises a reaction zone I and an activated sludge settling zone II. Volume V of reaction zone IReaction zoneVolume V of activated sludge settling zone IISettling zoneVolume ratio of VSettling zone:VReaction zone＝1:(4～6)。
The reaction zone I comprises an aerobic zone I-1 and an anoxic zone. Volume V of aerobic zone I-1Aerobic zoneAnd volume V of the anoxic zoneAnoxic zoneVolume ratio of VAerobic zone:VAnoxic zone1 (1-3). The anoxic zone further comprises a first anoxic zone I-2 and a second anoxic zone I-3. The reaction zone I is respectively a second anoxic zone I-3, an aerobic zone I-1 and a first anoxic zone I-2 from bottom to top. The right side of the lower part of the second anoxic zone I-3 is provided with a sludge discharge pipe 2 and a water inlet pipe 3, and the left side is provided with a manhole 1. The water inlet pipe 3 is the water inlet pipe of the whole reactor. The aerobic zone I-1 is separated from the first anoxic zone I-2 and the second anoxic zone I-3 by a separation and guide pipe 4. The separation and guide pipe 4 is formed by connecting a regular splayed cone body and a cylinder, and the included angle between the regular splayed cone body and the cylinder is 120-150 degrees. An aeration main pipe 6 is arranged in the aerobic zone I-1, the aeration main pipe 6 is connected from the top of the reactor, the bottom of the aeration main pipe is connected with a round aeration branch pipe, and a disc type aeration disc 5 is arranged on the branch pipe. All the disc-type aeration □ discs 5 are uniformly distributed in the middle of the separation and guide pipe 4, and the height of the position is adjustable.
The activated sludge settling zone II is positioned at the upper part of the reactor and comprises a first settling chamber i and a second settling chamber ii. The first settling chamber i is positioned among the first three-phase separator baffle plate 7, the second three-phase separator baffle plate 8 and the third three-phase separator baffle plate 9, and has surface load q1. The second settling chamber ii is arranged between the second three-phase separating baffle 8, the third three-phase separating baffle 9 and the inner wall of the reactor, and has the surface load q2. In this example, q1≈q2＝(0.25～0.59)m3/(m2·h)。
The three-phase separation baffle I7 is formed by connecting a cylinder and a regular splayed pyramid, and the included angle is 90-180 degrees. The three-phase separation baffle II 8 is an inverted splayed cone connected with the inner wall of the reactor, and the included angle between the cone and the inner wall is 0-90 degrees. The three-phase separation baffle III 9 is formed by connecting a cylinder and a regular splayed pyramid, and the included angle is 90-180 degrees. The ratio of the diameter D1 of the cylinder of the first three-phase separating baffle 7 to the diameter D2 of the cylinder of the third three-phase separating baffle 9 is D1: D2 is 1 (2-3). The top of the three-phase separation baffle plate III 9 is embedded with a rhombic overflow weir 14, the lower part of the rhombic overflow weir 14 is externally connected with a liquid receiving disc 10, the top of the liquid receiving disc 10 is provided with a defoaming disc 12 and a sawtooth overflow weir 13, and the right side of the liquid receiving disc passes through the outer wall of the reactor and is provided with a water outlet pipe 11.

Claims (5)

1. A high-efficiency aerobic biological fluidized bed reactor, which is characterized by comprising a reaction zone (I) and an activated sludge settling zone (II) positioned above the reaction zone (I), wherein:
the reaction zone (I) comprises a second anoxic zone (I-3), an aerobic zone (I-1), a first anoxic zone (I-2) and a partition and guide pipe (4), wherein an aeration main pipe (6) is arranged in the partition and guide pipe (4), the top end of the aeration main pipe (6) extends out of the reactor through an activated sludge settling zone (II), the bottom end of the aeration main pipe (6) is communicated with a plurality of circular aeration branch pipes, a plurality of disc-type aeration discs (5) are arranged on each circular aeration branch pipe, all the disc-type aeration discs (5) are uniformly distributed in the partition and guide pipe (4), the aerobic zone (I-1) is separated from the first anoxic zone (I-2) by the partition and guide pipe (4), and the aerobic zone (I-1) is arranged in the partition and guide pipe (4) and above the disc-type aeration discs (5); the first anoxic zone (I-2) is positioned at the periphery of the aerobic zone (I-1), and the second anoxic zone (I-3) is positioned below the aerobic zone (I-1) and the first anoxic zone (I-2); one side of the lower part of the second anoxic zone (I-3) is communicated with the sludge discharge pipe (2) and the water inlet pipe (3), and the other side of the lower part is communicated with the manhole (1);
the activated sludge settling zone (II) comprises a first settling chamber (i) and a second settling chamber (ii); a first three-phase separation baffle (7) surrounding the separation and flow guide pipe (4) is arranged above the top of the separation and flow guide pipe (4), a second three-phase separation baffle (8) and a third three-phase separation baffle (9) surround the first three-phase separation baffle (7), and the second three-phase separation baffle (8) is connected with the inner wall of the reactor; the first settling chamber (i) is positioned among the three-phase separation baffle I (7), the three-phase separation baffle II (8) and the three-phase separation baffle III (9); the second settling chamber (ii) is positioned between the second three-phase separation baffle (8), the third three-phase separation baffle (9) and the inner wall of the reactor; a rhombic overflow weir (14) is embedded at the top of the three-phase separation baffle III (9), the lower part of the rhombic overflow weir (14) is externally connected with a liquid receiving disc (10), a defoaming disc (12) and a sawtooth overflow weir (13) are arranged at the top of the liquid receiving disc (10), and the side edge of the liquid receiving disc (10) is communicated with a water outlet pipe (11) penetrating through the outer wall of the reactor;
the separation and draft tube (4) is formed by connecting a hollow splayed cone body and a cylinder up and down, and the included angle between the splayed cone body and the cylinder is 120-150 degrees; the aeration main pipe (6) is connected from the top of the reactor, and the height of the disc type aeration disc (5) is adjustable.
2. A highly efficient aerobic biological fluidized bed reactor according to claim 1, whereby the volume V of the reaction zone (i) isReaction zoneWith the volume V of the activated sludge settling zone (II)Settling zoneVolume ratio of VSettling zone:VReaction zone=1 (4-6); volume V of the aerobic zone (I-1)Aerobic zoneAnd the volume V of the anoxic zone consisting of the first anoxic zone (I-2) and the second anoxic zone (I-3)Anoxic zoneVolume ratio of VAerobic zone:VAnoxic zone= 1:(1~3)。
3. A high efficiency aerobic biological fluidized bed reactor according to claim 1, whereby the first settling chamber (i) has a surface load of q1(iii) the surface load of the second settling chamber (ii) is q2，q1≈q2=(0.25~0.59)m3/(m2•h)。
4. The efficient aerobic biological fluidized bed reactor as claimed in claim 1, wherein the first three-phase separation baffle (7) is formed by connecting a hollow cylinder and a right-splayed cone, and the included angle is 90-180 degrees; the second three-phase separation baffle (8) is an inverted splayed cone connected with the inner wall of the reactor, and the included angle between the inverted splayed cone and the inner wall of the reactor is 0-90 degrees; the three-phase separation baffle III (9) is formed by connecting a cylinder and a splayed pyramid, and the included angle is 90-180 degrees.
5. The efficient aerobic biofluid reactor according to claim 4, wherein the ratio of the diameter D1 of the cylinder of the first three-phase separating baffle (7) to the diameter D2 of the cylinder of the third three-phase separating baffle (9) is D1: D2=1 (2-3).
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CN206298424U (en) * 2016-11-09 2017-07-04 泓天(大连)环境科技发展有限公司 Mixed liquor, sludge can automatic back flow small-sized integrated sewage-treatment plant

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Publication number Priority date Publication date Assignee Title
CN105923771A (en) * 2016-06-17 2016-09-07 华北水利水电大学 Self-circulation biological denitrification reactor
CN206298424U (en) * 2016-11-09 2017-07-04 泓天(大连)环境科技发展有限公司 Mixed liquor, sludge can automatic back flow small-sized integrated sewage-treatment plant

Non-Patent Citations (1)

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