CN113307370A

CN113307370A - Barrel for water purification

Info

Publication number: CN113307370A
Application number: CN202110732302.8A
Authority: CN
Inventors: 张艺琼
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-08-27

Abstract

The invention discloses a cylinder for water purification, which comprises an upflow cylinder and a conical separation cylinder which are connected, wherein the peripheral side walls of the upper part of the upflow cylinder are respectively provided with a plurality of through holes, the bottom of the upflow cylinder is provided with an aerator, and the water body in the conical separation cylinder is respectively provided with a plurality of suspended fillers attached with biological films; the outer water bodies of the upflow cylinder and the conical separation cylinder are respectively provided with a plurality of elastic fillers which are vertically inserted into the water bodies, biological films are attached on the elastic fillers, and the upflow cylinder and the conical separation cylinder divide the water body in the area into an aerobic area outside the cylinder and an anoxic area inside the cylinder. The invention introduces the anoxic-aerobic biomembrane technology into the field of black and odorous water treatment by arranging double fillers, controls the filler area to form two relatively independent areas by utilizing the inverted conical separation barrel with small upper part and large lower part, and separates the biomembrane layer of the filler area into the anoxic and aerobic areas by utilizing the circulation effect formed by the aeration in the upflow barrel, thereby realizing the high-efficiency and low-energy-consumption water purification of the black and odorous water.

Description

Barrel for water purification

Technical Field

The invention relates to the technical field of water environment protection, in particular to a cylinder for purifying water, which can be used for purifying water quality of town slow-flow water or black and odorous water.

Background

The urban black and odorous water body not only brings extremely poor sensory experience to the masses, but also is an outstanding water environment problem which directly influences the production and life of the masses. The black odor of the urban water is mainly the result of imbalance of oxygen supply and oxygen consumption of the water due to excessive sewage receiving, and the sense of the water is very poor due to the fact that pollutants are converted and odorous substances such as ammonia nitrogen, hydrogen sulfide, volatile organic acid and the like and black substances such as iron and manganese sulfides are generated under the anoxic and anaerobic conditions of the water.

According to the working guideline for treating urban black and odorous water bodies, the treatment of the urban black and odorous water bodies is carried out according to the 'control of source, sewage interception and endogenous treatment'; circulating running water and supplying clean water; the basic technical route of water quality purification and ecological restoration is implemented. The existing treatment methods of the black and odorous water body are generally physical methods, chemical methods and biological methods, but the physical methods are high in investment cost and slow in effectiveness, the chemical methods are high in use cost and easily cause the problem of secondary pollution of the water body, the biological methods are widely applied to river black and odorous treatment, artificial wetland treatment, aquatic plant recovery, biological remediation and the like are mainly adopted, and the biological methods are slow in treatment speed at present.

Because the black and odorous water body is mostly a slow-flow water system and the pollutant load is large, the improvement of the self-purification capacity of the black and odorous water body has a decisive significance for maintaining long-acting water quality guarantee. The construction of the bank zone restoration ecosystem such as a grass planting ditch, an ecological bank protection, a permeable brick and the like has a certain significance for reducing pollution load, but has a very little effect of improving the self-purification capacity of the black and odorous water body. The artificial oxygenation improves the self-purification capacity of the water body, but is generally mainly suitable for maintaining the water quality of the urban water body after renovation, and has the water body reoxygenation function. For the black and odorous water body, particularly for the water body with larger pollution load after being controlled by various measures, obviously, the modes are not enough to maintain good water quality of the water body.

For the way of water body reoxygenation, if a certain amount of active microorganisms exist in the reoxygenation area while the reoxygenation area is maintained, main pollutants entering the water body are removed through the metabolism of the microorganisms, which has fundamental significance for maintaining the water quality of the water body. According to the traditional biodegradation principle, if a certain microbial biomass is maintained and the alternate change of aerobic, anoxic and anaerobic conditions is controlled, various pollution factors such as organic matters, ammonia nitrogen, total nitrogen and the like in the water body can be effectively removed, and the total phosphorus also has a certain removal effect. The oxygen supply of the black and odorous water body is relatively simple, but no particularly effective method exists at present how to maintain a certain amount of microorganisms in the vicinity of the oxygen supply area without loss.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings of the prior art, and provides a cylinder for purifying water, wherein an anoxic-aerobic biomembrane technology is introduced into the field of black and odorous water treatment by arranging double fillers (elastic fillers and suspended fillers), a filler area is controlled to form two relatively independent areas by utilizing an inverted conical separation cylinder with a small upper part and a large lower part, and a biomembrane layer in the filler area is separated into an anoxic area and an aerobic area by utilizing a circulation effect formed by aeration in an upflow cylinder, so that the high-efficiency and low-energy-consumption water purification of the black and odorous water is realized.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a barrel for water purifies which characterized in that: the device comprises an upflow cylinder which is immersed in a water body, wherein the bottom end of the upflow cylinder is connected with a conical separation cylinder which is communicated with the upflow cylinder and has a small upper part and a large lower part, the peripheral side walls of the upper part of the upflow cylinder are respectively provided with a plurality of through holes, an aerator is arranged in the water body at the bottom of the upflow cylinder, a plurality of suspended fillers attached with biological membranes are respectively arranged in the water body in the conical separation cylinder, and an upper grid and a lower grid are respectively and correspondingly fixed in the conical separation cylinder above and below the suspended fillers; the water body in the area where the upflow cylinder and the conical separation cylinder are arranged is divided into an aerobic area outside the cylinder and an anoxic area inside the cylinder; during aeration, water in the upflow cylinder flows upwards under the driving of the upflow bubbles generated when the aerator works, overflows out of the cylinder from the top end of the upflow cylinder and the plurality of through holes or directly overflows out of the cylinder from the plurality of through holes, reaches the outside of the upflow cylinder, returns to the inside of the conical partition cylinder through the bottom end of the conical partition cylinder, and sequentially circulates to form circulating water flow.

Furthermore, a cross rod is arranged on the water surface of the water body where the upflow cylinder and the conical separation cylinder are located, the top end of the upflow cylinder is hung on the cross rod through a cable, and a gap is formed between the top end of the upflow cylinder and the cross rod.

Furthermore, the cross rod erect and be fixed in on the support, the lower extreme of support all is fixed in the bottom, and the surface of water is all stretched out to the upper end of support.

Furthermore, the top ends of the elastic fillers are respectively hung on the cross rod, and the bottom ends of the elastic fillers are connected with bearing balls.

Furthermore, the conical partition cylinder is formed by enclosing a plurality of partition plates which are obliquely arranged, and the included angle between each partition plate and the horizontal plane is 45-50 degrees; the diameter of the lower end opening of the conical separation cylinder is 2.5-3.5 m.

Further, the aerator adopts a disc type microporous aerator, and is positioned at the joint of the upflow cylinder and the conical separation cylinder; the central line of the aerator is positioned on the same straight line with the central lines of the upflow cylinder and the conical separation cylinder, and the outer diameter of the aerator is slightly smaller than the inner diameter of the upflow cylinder.

Furthermore, the aerator is connected with an air pump through an air pipeline.

Furthermore, the upper grid is in a V shape.

Furthermore, the diameters of the meshes of the upper grid and the lower grid are smaller than the average diameter of the plurality of suspended fillers.

Furthermore, the bottom end of the conical separation cylinder is fixedly connected with an annular flow baffle.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention introduces the anoxic-aerobic biomembrane technology into the black and odorous water body treatment field by arranging double fillers (elastic fillers and suspended fillers), controls the filler area to form two relatively independent areas by utilizing the inverted conical separation barrel with small upper part and large lower part, and separates the biomembrane layer of the filler area into the anoxic and aerobic areas by utilizing the circulation effect formed by the aeration in the upflow barrel, thereby realizing the high-efficiency and low-energy-consumption water quality purification of the black and odorous water body.

2. The invention has the advantages of simple structure, small total weight, lower cost, no blockage, reliable operation and good water quality purification effect, has better removal efficiency on BOD5, COD, total nitrogen and ammonia nitrogen, and also has the effect of removing or reducing the odor and the chromaticity of the water body.

Drawings

Fig. 1 is a schematic structural view of the present invention, in which the direction of arrows indicates the direction of water flow.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is an enlarged schematic view of the structure of part B in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a cylinder for water purification comprises an upflow cylinder 1 immersed in a water body, the bottom end of the upflow cylinder 1 is connected with a conical separation cylinder 2 which is communicated with the upflow cylinder 1 and has a small upper part and a large lower part, the peripheral side walls of the upper part of the upflow cylinder 1 are respectively provided with a plurality of through holes 3, an aerator 4 is arranged in the water body at the bottom of the upflow cylinder 1, the water body in the conical separation cylinder 2 is respectively provided with a plurality of suspended fillers 5 attached with biological membranes, and an upper grid 6 and a lower grid 7 are respectively and correspondingly fixed above and below the suspended fillers 5 in the conical separation cylinder 2; the external water bodies of the upflow cylinder 1 and the conical separation cylinder 2 are respectively provided with a plurality of elastic fillers 8 which are vertically inserted into the water bodies, the elastic fillers 8 are respectively attached with a biological film, and the upflow cylinder 1 and the conical separation cylinder 2 divide the water body in the area into an aerobic area 9 positioned outside the cylinder and an anoxic area 10 positioned in the cylinder; during aeration, water in the upflow cylinder 1 flows upwards under the driving of ascending bubbles generated when the aerator 4 works, overflows out of the cylinder from the top end of the upflow cylinder 1 and the plurality of through holes 3 or directly overflows out of the cylinder from the plurality of through holes 3, reaches the outside of the upflow cylinder 1, returns to the inside of the conical partition cylinder 2 through the bottom end of the conical partition cylinder 2, and sequentially circulates to form circulating water flow.

In the invention, a cross bar 11 is arranged on the water surface of a water body where the upflow cylinder 1 and the conical separation cylinder 2 are positioned, the top end of the upflow cylinder 1 is hung on the cross bar 11 through a cable 12, and a gap is arranged between the top end of the upflow cylinder 1 and the cross bar 11. Therefore, the upflow cylinder 1 and the conical separation cylinder 2 are fixed, and the upflow cylinder 1 and the conical separation cylinder 2 are immersed into the water body to be treated.

Correspondingly, the cross bar 11 is erected and fixed on a bracket (not shown in the figure, the same below), the lower ends of the bracket are fixed at the water bottom, and the upper ends of the bracket extend out of the water surface. Hereby, the mounting of the crossbar 11 is achieved, keeping it at the water surface, or above or below the water surface.

Correspondingly, the top ends of the elastic fillers 8 are respectively hung on the cross rods 11, and the bottom ends of the elastic fillers 11 are respectively connected with the bearing balls 13. Therefore, the stability of the elastic fillers 8 in the water body can be ensured, the influence of water flow on the elastic fillers is reduced, and the elastic fillers can be prevented from being intertwined.

In the invention, a conical partition cylinder 2 is enclosed by a plurality of obliquely arranged partition plates, and the included angle between each partition plate and the horizontal plane is 45-50 degrees; the diameter of the lower port of the conical separation cylinder 2 is 2.5-3.5 m.

In the invention, the aerator 4 adopts a disc type microporous aerator, and the aerator 4 is positioned at the joint of the upflow cylinder 1 and the conical separation cylinder 2; the central line of the aerator 4 is on the same straight line with the central lines of the upflow cylinder 1 and the conical separation cylinder 2, and the outer diameter of the aerator 4 is slightly smaller than the inner diameter of the upflow cylinder 1.

Accordingly, the aerator 4 is connected to an air pump (not shown, the same applies hereinafter) through an air pipe 15. Thereby, air can be supplied to the aerator 4 through the air pipe 15 by the air pump.

In the present invention, the upper grid 6 is in a V-shape. Therefore, on the premise of blocking a plurality of suspended fillers 5 and preventing the suspended fillers from entering the interior of the upflow cylinder 1, the resistance to the ascending water flow can be reduced, and the water circulation inside and outside the cylinder is facilitated.

In addition, the mesh diameters of the upper and

lower grids

6, 7 are smaller than the average diameter of the several suspended fillers 5. Therefore, the loss of a plurality of suspended fillers 5 can be furthest ensured.

The bottom end of the conical separation cylinder 2 is fixedly connected with an annular flow baffle plate 14.

The invention is further described below with reference to the accompanying drawings:

the invention divides the water body of the filling area, namely the area where the upflow cylinder 1 and the conical separation cylinder 2 are positioned into two parts through the upflow cylinder 1 and the conical separation cylinder 2, the outside of the cylinder is provided with an aerobic area 9, the inside of the cylinder is an anoxic zone 10, the upflow cylinder 1 and the conical partition cylinder 2 naturally divide the water area into an outer cylinder area and an inner cylinder area, during aeration, the water in the upflow cylinder 1 flows upwards under the driving of the ascending bubbles, overflows out of the cylinder from the top end of the upflow cylinder 1 and a plurality of through holes 3 (when the water level is higher than the top end of the upflow cylinder 1) or directly overflows out of the cylinder from a plurality of through holes 3 (when the water level is lower than the top end of the upflow cylinder 1), reaches the outside of the upflow cylinder 1, returns to the inside of the conical separation cylinder 2 through the bottom end of the conical separation cylinder 2, and circulates in turn to form circulating water flow, namely, the water flow in the anoxic zone 10 flows away, and can enter the aerobic zone 9 without power through the flow rising cylinder 1, so that the circulation of the water flow is realized.

In order to ensure that the circulating water flow driven by the bubbles can form an anoxic zone 10 and an aerobic zone 9 inside and outside the cylinder, the air supply amount of the air pump, the rising flow rate of the upflow cylinder 1 determined by the air supply amount and the volume size of the filling area are key factors. If the aeration is too strong, the water flow is pushed to circulate once in a short time, the boundary between the anoxic zone and the aerobic zone of the biological membrane is not obvious, and the denitrification function is influenced; if the aeration intensity is too weak, the oxygen supply is insufficient, so that the aerobic zone is difficult to maintain the aerobic environment, the nitrification is difficult to complete, and if the aeration intensity is too weak, the promotion effect on water flow is weakened, and the circulation of oxygen deficiency and oxygen deficiency is difficult to realize. According to the requirement of biochemical reaction for dissolved oxygen concentration, the DO concentration of the anoxic zone 10 is preferably in the range of 0.2-0.5 mg/L, and the DO concentration of the aerobic zone 9 may be more than 2 mg/L.

It should be noted that the DO concentration theoretically required in the aerobic zone 9 is >2mg/L, but in biofilm systems the concentration of microorganisms is not particularly high and the DO concentration can be varied over a wide range without affecting the biological purification effect.

In the upflow cylinder 1, a large number of small micro-bubbles push the water flow to move upwards, the movement law of the micro-bubbles is similar to that of a density flow (the density of bubbles is less than that of water, and the density of formed gas-water mixed liquid is lower than that of water) and the shear flow (the large number of bubbles move upwards, and the water flow also moves upwards due to the shearing of the edge, but the flow velocity of the water flow is lower than that of the bubbles). The size of the diameter of the bubbles has large influence on the water flow, the diameter of the bubbles is small, the density flow effect is strong, and the shear flow effect is weak; and vice versa. In fact, because the bubbles are merged to a certain extent during the aeration process, the driving force of the actual water flow is mainly from the mixing of the heavy flow and the shear flow, and the heavy flow is weakened and the shear flow is gradually strengthened in the rising process (the rising speed of the bubbles is gradually accelerated). In addition, since it is difficult for the aerator 4 to accurately control the size of the aeration bubbles, the bubble size is usually distributed in a certain range, and the water depth and temperature directly affect the bubble size (the water depth is large, the pressure is large, and the bubble size is small, and the temperature is high, the bubble size is large), so that the situation is very complicated, and it is difficult to directly perform accurate theoretical analysis.

Therefore, through aeration simulation experiments, when a disc type microporous aerator (equipment parameters show that the diameter of aeration bubbles is 0.9-1.0 mm) is adopted, if the air supply amount of an air pump is controlled to be 50L/min, meanwhile, the diameter of an upflow cylinder is 300mm, the diameter of the aerator 4 is 260mm, and the aerator 4 is arranged in the water depth, namely about 2-3 m below the water surface, the flow velocity of the bubbles and water in an ascending channel (inside the upflow cylinder 1) can exceed 0.15-0.20 m/s, which is equivalent to the effect that the upflow flow is not lower than 10.6L/s. When the height of the conical partition cylinder 2 (the inner part is a filling area and a non-filling area) is 3.5m, and the diameter of the lower port of the conical partition cylinder 2 is 3.0m, considering that the backflow area actually also comprises a certain range outside the cylinder, considering that the volume of the non-filling area accounts for 50% of the volume of the filling area, the average time of water flow circulation once is 58.3min, which is quite ideal. When the oxygen utilization rate is considered as 15-18% (the high-quality aerator can reach 40% under the ideal condition, the aerator is arranged at a small depth, and the actual state is different from the ideal state, so that the value is low), the average oxygen supply intensity is 3.2-3.84 mg/L, namely the DO concentration of the water flowing back into the aerobic zone 9 is equivalent to the increment effect of 3.2-3.84 mg/L, and the method is also ideal.

Therefore, when the equipment parameters are proper, the invention can simultaneously meet the ideal hydraulic retention time requirement of the reaction device on the basis of obtaining proper oxygen supply amount. The above parameters can also be flexibly adjusted according to the actual operation effect, because the supplied air quantity is easy to adjust.

Based on the above analysis, it is known that the height of the upflow cylinder 1 should not be too low in order to avoid the formation of short flows during aeration and to maintain a suitable oxygen utilization rate; in addition, in order to improve the water flow and control the volume ratio of the anoxic zone 10 to the aerobic zone 9 in a proper range, namely the volume ratio of the anoxic zone to the aerobic zone is 1: 2.5-1: 3.5, under the condition that the water depth allows, an annular flow baffle plate 14 can be arranged at the bottom end of the conical partition cylinder 2.

A plurality of elastic fillers 8 are arranged outside the cylinder and are vertically placed, the upper end of each elastic filler needs to be fixed, namely fixed on the cross rod 11, and the lower end of each elastic filler is vertical to the elastic filler by arranging the bearing balls 13. The filler is uniformly arranged in the whole range of the plane projection of the conical separation barrel 2. The filler of the anoxic zone 10 is a suspended filler, a plastic light material with a diameter of 30-50 mm can be adopted, and the apparent density of the filler and the density of water after the biofilm is formed are slightly higher than the density of water. Too high a density of the suspended filler will lead to the filler being concentrated in the area where the lower grid 7 is located, and too low a density of the filler will be concentrated in the area where the upper grid 6 is located, both of which will affect the mass transfer and thus the water purification effect. The purpose of setting up graticule mesh 6 and graticule mesh 7 is to intercept the filler, avoids losing to avoid the filler to flow out anoxic zone 10 or run off to peripheral waters.

Go up graticule mesh 6 and set up in the junction of upwelling section of thick bamboo 1 and toper separate a section of thick bamboo 2, and be located the below of aerator 4, the purpose is interception suspended filler, avoids suspended filler to run off along with water. Go up graticule mesh 6 and can be in the same place with aerator 4 integrated connection, when needs overhaul or change suspension and pack, move out the surface of water with aerator 4 together with last graticule mesh 6 is whole, then from the water that rises a class section of thick bamboo 1 and aspirate the anoxic zone (or carry out strong aeration also temporarily in the device bottom), the suspension that is in toper partition section of thick bamboo 2 is packed and can all flows along with water.

In operation, the air pump compresses air which is then delivered to the aerator 4 via the air conduit 15 for aeration. The water is supplied with oxygen by the micro bubbles generated by the aerator 4, the bubbles will rise gradually, and the bubbles and the water are generated because the aerator 4 is positioned at the bottom of the upflow cylinder 1Will rise through the upcomer shaft 1 until it reaches the aerobic zone 9. In the process, partial micro bubbles are gradually polymerized into small bubbles, the bubbles can be separated from water after reaching the water surface, and oxygen is supplied to the water in the rising process. The bubbles are broken and disappear after reaching the water surface, and the water flow enters the aerobic zone 9 due to the plug flow effect. Under the action of the water flow of the upflow cylinder 1, the water flow of the anoxic zone 10 is supplemented to the aerator 4, thereby forming continuous aerobic-anoxic circulation. Because a large amount of biological films are formed on the fillers, under the action of the biological films, organic matters and ammonia nitrogen are decomposed in the aerobic zone 9, and the organic matters are thoroughly mineralized and converted into CO₂And H₂O, etc., the nitrogen of ammonia nitrogen or nitrogen-containing organic substances is converted into nitrate and nitrite. After the water stream enters the anoxic zone 10, the nitrogen in the nitrates and nitrites is converted to nitrogen for removal. The biological membrane is increased to a certain degree and can fall off and precipitate to the water bottom, and the sediment accumulated to the bottom of the water body to a certain degree needs to be cleaned by sludge.

When the water level of the water body is in a low water level state, all water circulates through a plurality of through holes 3 (the hole tops of which are 0.2-0.3 m lower than the lowest water level) arranged at the upper part of the upflow cylinder 1; when the water level of the water body is at a normal water level or a high water level, because the plurality of elastic fillers 8 and the upflow cylinder 1 are all in a submerged state, a part of bubbles and water overflow from the top end of the upflow cylinder 1 during aeration, and the water flow overflowing from the top end (the bubbles can be broken after overflowing) can diffuse around without the resistance of the fillers. If the water body has directional flow, the oxygen supply effect can be realized in a certain range under the directional flow; if the water body does not flow directionally, oxygen is supplied to the surface layer of the water body within a certain diameter range by taking the center of the device as a circle center. In this case, it is necessary to increase the aeration intensity and increase the amount of supplied air. The purpose of such arrangement is to ensure that the biological purification effect is obtained at the water body in a short distance of the device, and simultaneously oxygen supply can be obtained in a certain range outside the device to maintain the water quality, especially under the condition that lake flow is not obvious, in order to avoid the purification effect only on the surrounding water body in a short distance of the device, the large circulation of the water body can be promoted through overflow and diffusion, and the effective action range of the device is ensured to be larger.

The oxygen supply and the circulation flow rate must be able to meet the requirements of the microorganisms on the dissolved oxygen state (i.e., aerobic and anoxic states). And (4) analyzing the dissolved oxygen state, wherein the aerobic state is that the theoretical DO concentration is more than 2mg/L (the actual operation can be slightly lower than the value), and the anoxic state is that the DO concentration is about 0.20-0.50 mg/L. The air supply and the upflow rate determined by the air supply to the aerator 4 must be coordinated with the size of the single device module, otherwise the system will operate poorly or even fail. When the air supply amount of the aerator 4 is 50L/min and the depth of the aerator 4 in water is 2-3 m, the inner diameter of the upflow cylinder 1 can be 250-350 mm, so that the requirements of oxygen supply and reflux flow are met. If the depth of the polluted water body is large and the diameter of the upflow cylinder 1 takes a larger value, larger aeration air supply quantity can be adopted, and larger data can also be adopted for the flooding depth of aeration. The specific values can be comprehensively considered and arranged according to the water depth, lake flow and other conditions.

The invention is suitable for black and odorous water bodies with water depth of more than 4.0-4.5 m, and the water depth is more suitable in the range of 4-7 m. The operation control parameter of the invention is DO value, the probe of DO measuring instrument is arranged at the joint of the anoxic zone and the aerobic zone, namely the probe of DO measuring instrument is arranged at the bottom of the aerobic zone 9, namely the outer side surface of the annular flow baffle plate 14, when the DO value is monitored to be lower than 0.3 +/-0.1 mgL, the aeration air quantity is increased; when the monitored DO value is greater than 0.80 + -0.2 mgL, the amount of aeration air should be reduced.

The probe of the DO measuring instrument can be positioned in the water body outside the upflow cylinder 1 and the conical separation cylinder 2, namely in the aerobic zone 9, the probe of the DO measuring instrument is positioned outside the annular flow baffle plate 14 at the bottom end of the conical separation cylinder 2 as the optimal scheme, and when the monitored DO value is lower than 0.3 +/-0.1 mgL, the aeration air quantity is increased; when the monitored DO value is greater than 0.80 + -0.2 mgL, the amount of aeration air should be reduced.

Of the two types of fillers, the shape, density and size of the suspended filler are all very important. The suspended filler is spherical, and if other shapes are adopted, accumulation at the upper grid is easy to cause, so that the effect is influenced. The diameter of suspension filler is good with 30 ~ 50mm, and too big leads to the inside mass transfer of filler to receive the influence easily, and the mesh diameter of graticule mesh is very little then to the undersize, takes place to block up easily. Because the apparent density of the biofilm part of the suspended filler is about 1.01-1.02 (namely slightly higher than the density of water) after the biofilm is loaded (attached) on the suspended filler, the invention requires that the overall density (only a solid part, not including a water part in a gap) of the suspended filler loaded with the biofilm is slightly higher than the density of water, so the density of the suspended filler is preferably about 1.00. The whole density of the suspended filler loaded with the biological membrane is about 1.005-1.010, the suspended filler can sink in static or nearly static water, and the suspended filler can have enough mobility when water flow has certain disturbance or flow. When the load of the biological film is too large, temporary violent aeration can be adopted at the bottom of the device to cause the suspended filler to collide with the water flow rapidly, and the biological film which is excessively loaded can fall off.

The elastic filler has low requirements on parameters and arrangement, and only needs to maintain the inner sparse and the outer dense and be arranged according to a concentric circle shape. In order to keep water flow smooth and avoid the phenomenon of adhesion and agglomeration after the elastic filler loads a biological membrane, a certain gap needs to be reserved between the elastic fillers. The elastic filler weight of not hanging the membrane at the operation initial stage is very little, in order to avoid the initial stage to take place the winding, except keeping having certain distance between every elastic filler, still adopt the bottom to hang the mode of bearing ball, elastic filler just so need the upper end fixed, hang on horizontal pole 11 can, can directly take off an elastic filler when needs are overhauld, it is comparatively convenient to operate. The elevation arrangement of the elastic fillers 8 needs to meet the requirement that the upper ends of the elastic fillers are 0.2-0.3 m higher than the elevations of the through holes 3 on the upper part of the upflow cylinder 1, the elevation of the tops of the elastic fillers is consistent with the lowest water level, and even if the elastic fillers are just submerged when the elastic fillers are at the lowest water level.

The upper portion of rising a class section of thick bamboo 1 is equipped with a plurality of through-hole 3 in the below of minimum water level department, and the height of a plurality of through-hole 3 is preferred for being less than or equal to the diameter of rising a class section of thick bamboo 1, and the elevation of the upper portion of a plurality of through-hole 3 is less than minimum water level 0.2 ~ 0.3 m. The sum of the cross-sectional areas of the through holes 3 is preferably greater than or equal to 1.5 times of the cross-sectional area of the upflow cylinder 1. The highest elevation of the upflow cylinder 1 is preferably 0.2-0.3 m higher than the top elevation of the elastic fillers 8, and is substantially slightly lower than the normal water level.

The conical separation cylinder 2 is composed of a plurality of inclined arrangedThe partition boards can be in various shapes theoretically, the cross sections of the partition boards are circular, rectangular or polygonal, preferably, the included angle between each partition board and the horizontal plane is 45 degrees, each partition board is triangular, four partition boards are enclosed to form a quadrangular pyramid with the top end cut off, and the length of three sides of each partition board is 2.500 m, 2.165m and 2.165 m. The projection shape of the enclosed conical partition cylinder 2 on the plane is square, and the side length of the square is 2.50 m. After the top end of the conical separation cylinder 2 is cut off, a circular hole with the diameter of 300mm is reserved, the upward flow cylinder 1 is vertically installed, the height of the upward flow cylinder 1 is 3.0m, a plurality of through holes 3 are respectively arranged on four sides within the range of 2.00-2.20 m in height, and the total area of the plurality of through holes is 0.164m²And the cross-sectional area of the upflow cylinder 1 is 0.071m²。

The total height of the invention is 4.80m, wherein the height of the upflow cylinder 1 is 3.0m, the height of the conical separation cylinder 2 is 1.10m, and the height of the annular flow baffle plate 14 is 0.70 m. A gap of 0.40m is reserved between the bottom end of the annular flow baffle plate 14 and the water bottom, so that the depth of the water body is 5.20m at a high water level and 4.60m at a low water level. When the water level changes in other ranges, the height of the gap between the bottom end of the annular flow baffle plate 14 and the water bottom or the height of the upflow cylinder 1 can be adjusted to meet the requirement of water level change.

Volume of anoxic zone 10 and aerobic zone 9: the total volume of the anoxic zone 10 is the sum of the volumes of the conical separation cylinder 2 and the annular flow baffle plate 14, and the volume of the conical separation cylinder 2 is as follows: 2.50 mx 1.25 mx 1/3-2.60 m³(ii) a The volume of the annular baffle plate 14 is: 2.50m × 2.50m × 0.70m ═ 4.38m³(ii) a The total is about 7.0m³. The volume of the aerobic zone 9 is the part corresponding to the lowest water level above the conical partition cylinder 2, and is as follows: 6.25m²×(1.25m×2/3+2.20+0.20)＝20.20m³(ii) a Thus, the volume ratio of the aerobic zone 9 to the anoxic zone 10 is: 20.20m³÷7.0m³＝2.89。

When the diameter of the upflow cylinder 1 is 300mm, the diameter of the aerator 4 is 260mm, which is easy to install, the air supply amount is 50L/min, the aerator 4 is arranged at the water depth of 2.40m (based on the lowest water level), the flow velocity of the bubbles and water in the upflow cylinder 1 is 0.20m/s, the average hydraulic retention time is about 48min, and the aerobic zone 9 is formedThe average residence time is 35.6min, the average residence time in the anoxic zone 10 is 12.4min, and the average residence time corresponds to the treatment circulation flow 1230m³(ii)/d, i.e. the daily treatment circulation flow rate is 1230m³。

Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.

Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. The utility model provides a barrel for water purifies which characterized in that: the device comprises an upflow cylinder which is immersed in a water body, wherein the bottom end of the upflow cylinder is connected with a conical separation cylinder which is communicated with the upflow cylinder and has a small upper part and a large lower part, the peripheral side walls of the upper part of the upflow cylinder are respectively provided with a plurality of through holes, an aerator is arranged in the water body at the bottom of the upflow cylinder, a plurality of suspended fillers attached with biological membranes are respectively arranged in the water body in the conical separation cylinder, and an upper grid and a lower grid are respectively and correspondingly fixed in the conical separation cylinder above and below the suspended fillers; the water body in the area where the upflow cylinder and the conical separation cylinder are arranged is divided into an aerobic area outside the cylinder and an anoxic area inside the cylinder; during aeration, water in the upflow cylinder flows upwards under the driving of the upflow bubbles generated when the aerator works, overflows out of the cylinder from the top end of the upflow cylinder and the plurality of through holes or directly overflows out of the cylinder from the plurality of through holes, reaches the outside of the upflow cylinder, returns to the inside of the conical partition cylinder through the bottom end of the conical partition cylinder, and sequentially circulates to form circulating water flow.

2. The water body purification cartridge according to claim 1, wherein: the water surface of the water body where the upflow cylinder and the conical separation cylinder are arranged is provided with a cross bar, the top end of the upflow cylinder is hung on the cross bar through a cable, and a gap is arranged between the top end of the upflow cylinder and the cross bar.

3. The water body purification cartridge according to claim 2, wherein: the cross rod is erected and fixed on the support, the lower end of the support is fixed at the water bottom, and the upper end of the support extends out of the water surface.

4. The water body purification cartridge according to claim 2, wherein: the top ends of the elastic fillers are respectively hung on the cross rods, and the bottom ends of the elastic fillers are connected with bearing balls.

5. The water body purification cartridge according to claim 1, wherein: the conical partition cylinder is formed by enclosing a plurality of obliquely arranged partition plates, and the included angle between each partition plate and the horizontal plane is 45-50 degrees; the diameter of the lower end opening of the conical separation cylinder is 2.5-3.5 m.

6. The water body purification cartridge according to claim 1, wherein: the aerator adopts a disc type microporous aerator and is positioned at the joint of the upflow cylinder and the conical separation cylinder; the central line of the aerator is positioned on the same straight line with the central lines of the upflow cylinder and the conical separation cylinder, and the outer diameter of the aerator is slightly smaller than the inner diameter of the upflow cylinder.

7. The water purifying cylinder according to claim 6, wherein: the aerator is connected with an air pump through an air pipeline.

8. The water body purification cartridge according to claim 1, wherein: the upper grid is in a V shape.

9. The water body purification cartridge according to claim 1, wherein: the mesh diameters of the upper grid and the lower grid are smaller than the average diameter of the plurality of suspended fillers.

10. The water body purification cartridge according to claim 1, wherein: the bottom end of the conical separation cylinder is fixedly connected with an annular flow baffle.