CN215208681U - High-speed contact biochemical reaction sewage treatment device - Google Patents

Abstract

The utility model provides a high-speed contact biochemical reaction's sewage treatment plant, relates to water treatment technical field, and it includes: the biochemical system, the grid sedimentation tank and the sludge collection system are sequentially communicated; the biochemical system comprises a contact biochemical reaction area and an oxygen increasing area. The treatment device has compact structure, simpler and more efficient process route, can reduce equipment investment and operation energy consumption, has low treatment cost, and has good environmental benefit and economic benefit.

Description

High-speed contact biochemical reaction sewage treatment device

Technical Field

The utility model belongs to the technical field of the water treatment technique and specifically relates to a sewage treatment plant of high-speed contact biochemical reaction is related to.

Background

The concept of biochemical treatment is proposed as opposed to ecological treatment. Biochemical processes generally include two important elements: 1. supplying oxygen to the water by a large amount of aeration to support the survival of microorganisms; 2. the microorganisms are used for decomposing organic matters in the sewage, thereby purifying the sewage. The biochemical treatment is the core of most of the traditional sewage treatment processes, and most of municipal sewage treatment plants in China adopt the biochemical treatment technology to treat domestic sewage of urban residents.

At present, the biochemical process mainly comprises A²0 process, SBR process, oxidation ditch, MBR process, oxidation pond and the like, the process is applied to various sewage treatments, and according to the current operation condition, A²The 0 process is limited by the age of sludge, dissolved oxygen and nitrate nitrogen in the returned sludge, the phosphorus removal effect is not very ideal, and meanwhile, the denitrification effect depends on the reflux ratio of the mixed liquor, and the reflux ratio of the AAO method is not too high (generally not more than 200%), so the denitrification effect cannot meet the higher requirement; the SBR process is operated intermittently and periodically, the automatic control cost and the labor cost are high, and meanwhile, the process is operated in a variable water level mode, so that the energy consumption is high; compared with the traditional biochemical process, the oxidation ditch and the oxidation pond have large occupied area and high investment cost, and filamentous bacterial sludge expansion is easily caused when the content of N, P is unbalanced, the pH value is low, the sludge load in the oxidation ditch is too high, the dissolved oxygen concentration is insufficient, the sludge discharge is not smooth and the like when the carbohydrate in the wastewater is more; although the MBR process has good treatment effect and higher impact resistance, the membrane module has high manufacturing cost and large investment, which leads to the fact that the work cost is highThe investment of the process is increased by about 30 to 50 percent compared with the conventional treatment method; high-strength aeration, and high energy consumption caused by large membrane driving pressure for increasing flow speed and separating mud and water to reduce membrane pollution; the membrane module generally has a service life of about 5 years and needs to be replaced due to the expiration, so that the operation cost is high.

Therefore, it is necessary to design a sewage treatment apparatus which can contact biochemical reaction at high speed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the sewage treatment device with high-speed contact biochemical reaction is designed, and has the advantages of high integration, high efficiency, small occupied area and low cost.

The utility model provides a pair of high-speed contact biochemical reaction's sewage treatment plant, include: the biochemical system, the grid sedimentation tank and the sludge collection system are sequentially communicated; the biochemical system comprises a contact biochemical reaction area and an oxygen increasing area.

Preferably, the contact biochemical reaction area comprises a plurality of reaction tanks, the number of the reaction tanks is even, and every two reaction tanks are a group and are connected through a communicating pipe; the oxygenation area comprises a plurality of oxygenation pools and an aeration system for introducing air into the oxygenation pools; the multiple groups of reaction tanks are sequentially connected through the aeration tank, a water inlet pipe is arranged on the first reaction tank of the first group, and the second reaction tank of the last group is connected with the grid sedimentation tank through the aeration tank; all be equipped with the mud pipe on this a plurality of reaction ponds and with collection mud headtotail, also be equipped with the mud pipe on the net sedimentation tank and with collection mud headtotail, be equipped with the outlet pipe on the net sedimentation tank.

Preferably, all be equipped with three-dimensional resilient means, partition wall, collection mud hole in every reaction tank, three-dimensional resilient means is including setting up a plurality of vertical filler connecting rope in the reaction tank and entangling the biofilm carrier on vertical filler connecting rope, is equipped with at least one partition wall between the water inlet to the delivery port of reaction tank, and the reaction tank bottom is equipped with collection mud hole, and collection mud hole passes through mud pipe and collection mud headtotail.

Preferably, the aeration system comprises an aeration main pipe, aeration coil pipes and aeration discs, wherein at least one aeration coil pipe is arranged in each aeration tank, a plurality of aeration discs are arranged on each aeration coil pipe, and the plurality of aeration discs are distributed at the bottom of the aeration tank.

Preferably, an L-shaped partition wall is arranged between the water inlet and the water outlet of the first oxygen increasing pool, and the last oxygen increasing pool is connected with a medicine adding system through a medicine adding pipe and used for adding medicine into the oxygen increasing pool.

Preferably, the grid sedimentation tank comprises a plurality of sedimentation units which are connected in sequence, at least one sedimentation unit is provided with a grid device, the first sedimentation unit is connected with the last aeration tank, and the last sedimentation unit is provided with a water outlet pipe.

Preferably, the mud collecting system includes mud pipe, mud discharging system, mud collecting channel and mud collecting tank, and mud collecting tank and mud collecting channel intercommunication, biochemical system and net sedimentation tank are connected with mud collecting channel or mud collecting tank through the mud pipe respectively, and mud discharging system sets up in mud collecting tank for the mud extraction in the mud collecting tank is discharged.

The utility model discloses a device uses sewage as the raw water, and the raw water passes through the inlet tube and gets into anaerobism 1# and 2# reaction tank in, sets up three-dimensional resilient means in the pond, and the microorganism adheres to and forms the biomembrane on its surface, and sewage is at the flow carrier surface in-process, and the biomembrane decomposes the pollutant through the effects such as absorption of organic nutrient, the inside diffusion of biomembrane and the biological oxidation that takes place in the membrane. The water after anaerobic treatment enters a first oxygenation tank of an oxygenation zone, the oxygen content of raw water is improved through an aeration system of the oxygenation zone, then the water rich in oxygen enters a facultative reaction tank 3, a biological membrane on a carrier carries out aerobic treatment on the raw water by consuming oxygen, and the oxygen content of the raw water is suddenly reduced along with the consumption of the oxygen to form an anoxic state; the raw water in an anoxic state enters a subsequent anoxic 4# reaction tank, and the pollutants in the water are further removed through the actions of denitrification reaction, adsorption of organic nutrients and the like through a biological membrane on a carrier in the 4# reaction tank; the raw water after the first-stage biochemical treatment enters an oxygenation 5# reaction tank, and is sequentially and repeatedly circulated to carry out multi-stage biochemical treatment so as to achieve the aim of sewage purification; and then the SS of the treated raw water is further removed through a mesh sedimentation tank, and the treated raw water is discharged after reaching the standard. Wherein the residual sludge contacting the biochemical reaction area and the mesh sedimentation tank is uniformly collected and discharged through a sludge system.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the device changes the prior structural form by efficiently and reasonably co-building each treatment structure, thereby saving civil engineering investment and occupied area;

2. the device spontaneously forms an anaerobic zone, an anoxic zone, a facultative zone and an aerobic zone by depending on the change of the consumption of dissolved oxygen in the biochemical treatment process of raw water, and achieves the biochemical treatment effect on the raw water. Compared with the traditional biochemical process, the process does not need to be provided with an anoxic tank and an aerobic tank independently, so that the process route is simpler and more efficient; the equipment investment is less; the system operation control is simple;

3. the device adopts a multi-gallery and baffled structure, increases the contact specific surface area and the contact degree of raw water and a biological membrane, and is matched with the characteristics that the concentration of microorganisms in a biological membrane reactor is high, and the amount of microorganisms in a unit volume reactor can be 5-20 times as high as that of an activated sludge method, so that the reaction efficiency is greatly improved, and the hydraulic retention time is shortened;

4. the contact biochemical reaction system of the device comprises a multi-stage biochemical reaction process, so that the nitrogen removal capability is greatly improved, and the phosphorus removal effect is further ensured by matching a dosing system and a grid sedimentation tank; the process has low suspended sludge content and less residual sludge, so that an internal circulation system is not required, and the equipment investment and the operation energy consumption are reduced;

in conclusion, the device has low energy consumption, low treatment cost and good environmental and economic benefits.

Drawings

FIG. 1 is a plan view of a high-speed biochemical reaction-contacting sewage treatment apparatus according to a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of an oxygenation zone in a preferred embodiment of the present invention;

FIG. 3 is a schematic view of a part of the structure of a reaction tank according to a preferred embodiment of the present invention;

fig. 4 is a plan view of a mesh settling tank in accordance with a preferred embodiment of the present invention;

fig. 5 is a schematic structural view of a mud collecting system according to a preferred embodiment of the present invention;

the reference numbers illustrate:

1. a contact biochemical reaction area 11, a reaction tank 12, a communicating pipe 13, a water inlet pipe 14, a mud collecting pit 15, a three-dimensional elastic device 151, a connecting rope 152, biological stuffing 16 and a partition wall,

2. an oxygenation area 21, an oxygenation tank 22, an aeration system 23, an aeration main pipe 24, an aeration coil pipe 25, an aeration plate 26, an L-shaped partition wall 27 and a dosing pipe,

3. a grid sedimentation tank 31, a sedimentation unit 32, a water outlet pipe,

4. mud collection system, 41, mud pipe, 42, mud discharge system, 43, mud collection channel, 44, mud collection pond.

Detailed Description

The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 5, the present embodiment provides a high-speed biochemical reaction-contacting sewage treatment apparatus, including: a biochemical system, a grid sedimentation tank 3 and a sludge collection system 4 which are communicated in sequence; the biochemical system comprises a contact biochemical reaction area 1 and an oxygen increasing area 2.

In the device, all unit structures are built into a whole, the plane structure is rectangular, in the embodiment, the length of the device is preferably larger than the width, the structure is preferably a reinforced concrete structure, and the structural characteristics are favorable for increasing the rigidity and the stability of the device, have higher economic benefit and save the occupied area.

As shown in fig. 1 to 3, the contact biochemical reaction area 1 includes a plurality of reaction cells 11, the number of the reaction cells 11 is an even number, every two reaction cells 11 are in a group and connected by a communicating pipe 12, in this embodiment, 10 reaction cells 11 are provided, as shown in fig. 1, 1# to 10#, and 5 groups, and the two reaction cells 11 of each group are connected by a communicating pipe 12.

Meanwhile, the oxygen increasing zone 2 comprises a plurality of oxygen increasing ponds 21 and an aeration system 22 for introducing air into the plurality of oxygen increasing ponds 21. The reaction tanks 11 of the plurality of groups are sequentially connected through the aeration tanks 21, a water inlet pipe 13 is arranged on the first reaction tank 11 of the first group, namely the No. 1, and the second reaction tank 11 of the last group, namely the No. 10, is connected with the grid sedimentation tank 3 through the aeration tank 21. All be equipped with mud pipe 41 on these a plurality of reaction tank 11 and be connected with collection mud system 4, also be equipped with mud pipe 41 on the net sedimentation tank 3 and be connected with collection mud system 4, be equipped with outlet pipe 32 on the net sedimentation tank 3, water up to standard after biochemical system and the net sedimentation tank 3 handle can go out through outlet pipe 32.

Wherein, a three-dimensional elastic device 15, a partition wall 16 and a mud collecting pit 14 are arranged in each reaction tank 11. The stereoscopic elastic device 15 comprises a plurality of longitudinal packing connecting strings 151 disposed in the reaction tank 11 and biological packing 152 tangled on the longitudinal packing connecting strings 151. The biological filler 152 can be uniformly spread in a three-dimensional and all-directional manner in the effective area, so that sewage and a biological membrane are fully mixed, infiltrated, contacted and exchanged, the biological membrane can be uniformly implanted on each strand, good activity and gap variability are kept, a larger and larger specific surface area can be obtained in the operation process, and good metabolism can be carried out. In brief, the device mainly has the effects of facilitating film formation, retaining microorganisms and facilitating full contact reaction of sewage and sludge. The distribution distance of the longitudinal filler connecting ropes 151 is 150-250mm, and the height is 2.5-4.5 m.

At least one partition wall 16 is arranged between a water inlet and a water outlet of the reaction tank 11, two partition walls 16 are arranged in parallel along the water flow direction in the implementation, the two partition walls are arranged in a front-back staggered mode, the width of each partition wall 16 is 350mm smaller than that of the biochemical treatment unit tank body, the height of the bottom of each partition wall 16 is 200mm higher than that of the bottom of the biochemical treatment unit tank body, and the height of the upper portion of each partition wall is consistent with that of the tank body. The path of water flowing through the reaction tank 11 can be greatly increased, the contact time with the biological filler 152 is increased, and the reaction efficiency is improved. Simultaneously, 11 bottoms in reaction tank are equipped with collection mud hole 14, and collection mud hole 14 passes through mud pipe 41 and is connected with collection mud system 4, and collection mud hole 14 position sets up in 11 bottoms in each reaction tank, is close to collection mud system 4, and the degree of depth should be 500mm, and 11 bottoms in reaction tank are equipped with towards the slope that collection mud pond 44 inclines, and about 1 degree of slope, mud in the reaction tank 11 will flow gradually to in the collection mud pond 44, the collection of the mud of being convenient for and shift through mud pipe 41.

Meanwhile, a water outlet and a water inlet are arranged in the aeration tank 21 and are respectively connected with the reaction tanks 11 in front of and behind the aeration tank, the water outlet and the water inlet are arranged in a staggered mode from top to bottom, and the size of the opening is 300mm to 300 mm. The difference is that an L-shaped partition wall 26 is arranged between the water inlet and the water outlet of the first oxygen increasing tank 21, the height of the L-shaped partition wall is consistent with the height of the tank body, one end of the L-shaped partition wall is parallel to the direction of water flow, the distance between the L-shaped partition wall and the top tank wall of the oxygen increasing zone 21# is 350mm, the height of the L-shaped partition wall is consistent with the height of the tank body, the retention time of sewage in the oxygen increasing tank 21 is prolonged, and the oxygen increasing efficiency of the L-shaped partition wall is improved. The last oxygen increasing tank 21 is connected with a medicine adding system through a medicine adding pipe 27, the medicine adding system is used for adding medicine into the oxygen increasing tank 21, and the pipe diameter of the medicine adding pipe 27 is DN 25.

Further, the aeration system 22 includes an aeration main pipe 23, aeration coil pipes 24 and aeration discs 25, at least one aeration coil pipe 24 is provided in each aeration tank 21, a plurality of aeration discs 25 are provided on each aeration coil pipe 24, and the plurality of aeration discs 25 are distributed at the bottom of the aeration tank 21. When the aeration system 22 is started, a large amount of outside air is distributed to the aeration coil pipes 24 and the aeration discs 25 arranged on the aeration coil pipes 24 through the aeration main pipe 23, the aeration discs 25 are uniformly distributed at the bottom of the aeration tank 21, dissolved oxygen in the aeration tank 21 is increased, and the water body is in an aerobic environment, so that the subsequent aerobic stage treatment of the water body is promoted. In this embodiment, the distance between the aeration discs 25 is 150mm and 250 mm.

As shown in fig. 1 and 4, the mesh sedimentation tank 3 includes a plurality of sedimentation units 31 connected in sequence, at least one of the sedimentation units 31 is provided with a mesh device, the first sedimentation unit 31 is connected with the last aeration tank 21, and the last sedimentation unit 31 is provided with a water outlet pipe 32. In this implementation, the grid device is the net bars of parallel precipitation unit 31 bottom, is located precipitation unit 31 middle part, and precipitation unit 31 has the flocculation effect, and grid device's bars width 5mm-80mm, bars interval 20mm-120mm are unsettled to be arranged in precipitation unit 31, improve the turbulent motion state of rivers, increase little vortex quantity, can increase substantially energy utilization to improve coagulating sedimentation's efficiency. The grid device is arranged parallel to the bottom of the sedimentation unit 31 and is 2.5 meters away from the bottom of the tank; if a double-layer grid device is arranged, the distance between the double-layer grid device and the grid device is 1.0-1.2 meters.

In this embodiment, the mesh sedimentation tank 3 comprises ten groups of sedimentation units 31a, b, c, d, e, f, g, h, i, j, k, o and a water outlet area, the sedimentation unit 31a area is communicated with the b area, the upper part of the sedimentation unit is provided with openings which are 200mm to 200 mm; the region b and the region c of the precipitation unit 31 are communicated, the lower part of the precipitation unit is provided with an opening, and the size of the opening is 200mm to 200 mm; by analogy, the positions of the openings of the partition walls 16 of the sedimentation units 31 are staggered up and down. This precipitation unit 31 is formed by the combination of the many check that turn over from top to bottom, and rivers form efflux and vortex alternating flow field form after hanging in the grid device that precipitation unit 31 set up many times to reinforcing vortex, improving flocculation effect, have simple structure, save material, the head loss is little (0.1 ~ 0.15m) and flocculation excellent characteristics such as effectual.

Wherein, two layers of grid sedimentation devices are arranged on the sedimentation units 31 a-j, the grid sedimentation devices are not arranged on the sedimentation unit 31k and the sedimentation unit 31o, and the two sedimentation units 31 are provided with sludge discharge pipes 41 connected with the sludge collecting channels 43.

As shown in fig. 1 and 5, the sludge collecting system 4 includes a sludge discharge pipe 41, a sludge discharge system 42, a sludge collection channel 43 and a sludge collection tank 44, the sludge collection tank 44 is communicated with the sludge collection channel 43, the biochemical system and the mesh sedimentation tank 3 are respectively connected with the sludge collection channel 43 or the sludge collection tank 44 through the sludge discharge pipe 41, and the sludge discharge system 42 is disposed in the sludge collection tank 44 and is used for pumping and discharging sludge in the sludge collection tank 44.

The mud channel is 1.2m high, and the mud collecting pool 44 is 3.5m-4.5m deep. One end of the sludge discharge pipe 41 extends into the sludge collection pool 44 or the sludge collection channel 43, and the other end extends into the corresponding sludge collection pit 14 or the corresponding sedimentation unit 31k or the corresponding sedimentation unit 31o of the reaction pool 11, and is provided with a bell mouth, and the pipe diameter is preferably 150 mm. The sludge collecting tank 44 uniformly discharges collected sludge into a sludge disposal system through the sludge discharge system 42, and the sludge discharge system 42 is arranged in the sludge collecting tank 44 and comprises a sludge discharge pump, a sludge discharge pipe 41, pipe fittings and the like.

The treatment device has compact structure, simpler and more efficient process route, can reduce equipment investment and operation energy consumption, has low treatment cost, and has good environmental benefit and economic benefit.

Novel solutions, not limitations thereof; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (7)

1. A sewage treatment device for high-speed contact biochemical reaction is characterized by comprising: the biochemical system, the grid sedimentation tank and the sludge collection system are sequentially communicated; the biochemical system comprises a contact biochemical reaction area and an oxygen increasing area.

2. The apparatus for treating wastewater by high-speed biochemical reaction according to claim 1, wherein: the contact biochemical reaction area comprises a plurality of reaction tanks, the number of the reaction tanks is even, and every two reaction tanks are a group and are connected through a communicating pipe; the oxygenation area comprises a plurality of oxygenation pools and an aeration system for introducing air into the oxygenation pools; the multiple groups of reaction tanks are sequentially connected through the aeration tank, a water inlet pipe is arranged on the first reaction tank of the first group, and the second reaction tank of the last group is connected with the grid sedimentation tank through the aeration tank; all be equipped with the mud pipe on this a plurality of reaction ponds and with collection mud headtotail, also be equipped with the mud pipe on the net sedimentation tank and with collection mud headtotail, be equipped with the outlet pipe on the net sedimentation tank.

3. The apparatus for treating wastewater by high-speed biochemical reaction according to claim 2, wherein: all be equipped with three-dimensional resilient means, partition wall, collection mud hole in every reaction tank, three-dimensional resilient means is including setting up a plurality of vertical filler connecting rope in the reaction tank and the biofilm carrier of tangle on vertical filler connecting rope, is equipped with at least one partition wall between the water inlet to the delivery port of reaction tank, and the reaction tank bottom is equipped with a collection mud hole, and a collection mud hole passes through mud pipe and a collection mud headtotail.

4. The apparatus for treating wastewater by high-speed biochemical reaction according to claim 2, wherein: the aeration system comprises an aeration main pipe, aeration coil pipes and aeration disks, wherein at least one aeration coil pipe is arranged in each aeration tank, a plurality of aeration disks are arranged on each aeration coil pipe, and the plurality of aeration disks are distributed at the bottom of the aeration tank.

5. The apparatus for treating wastewater by high-speed biochemical reaction according to claim 4, wherein: an L-shaped partition wall is arranged between the water inlet and the water outlet of the first oxygen increasing pool, and the last oxygen increasing pool is connected with a medicine adding system through a medicine adding pipe and used for adding medicine into the oxygen increasing pool.

6. The apparatus for treating wastewater by high-speed biochemical reaction according to claim 1, wherein: the grid sedimentation tank comprises a plurality of sedimentation units which are connected in sequence, at least one sedimentation unit is internally provided with a grid device, the first sedimentation unit is connected with the last aeration tank, and the last sedimentation unit is provided with a water outlet pipe.

7. The apparatus for treating wastewater by high-speed biochemical reaction according to claim 1, wherein: the mud collecting system comprises a mud discharging pipe, a mud discharging system, a mud collecting channel and a mud collecting pool, wherein the mud collecting pool is communicated with the mud collecting channel, the biochemical system and the grid sedimentation pool are respectively connected with the mud collecting channel or the mud collecting pool through the mud discharging pipe, and the mud discharging system is arranged in the mud collecting pool and used for extracting and discharging the mud in the mud collecting pool.

Images