CN1654356A - Water quality improvement device for water pumping and aeration enhanced biological contact oxidation - Google Patents

Abstract

The present invention discloses one kind of combined water quality improving apparatus with aerating water and biological contact oxidation. The combined water quality improving apparatus includes water sprinkling aerator in the lower part, biological contacting oxidation stuffing unit in the upper par, and air distributing system in between. The water sprinkling aerator inflates oxygen into water with compressed air and distributes lower layer water to biological contacting oxidation stuffing area, and the air distributing system collects the tail air and distributes it to the biological stuffing area. The present invention is used in mixing upper and lower water layers in reservoir or lake to aerate water, oxidize and degrade organic matter, and oxidize and eliminating Fe and Mn.

Description

Water quality improvement device for water pumping and aeration enhanced biological contact oxidation

technical field

The invention relates to a water quality improvement device, in particular to a water quality improvement device combining a hydraulic mixing aeration device and a biological contact oxidation device.

Background technique

Reservoirs and lakes have large capacity, large water depth, and low fluidity, which bring some negative impacts. Due to the large water depth and low fluidity, it is easy to form water stratification phenomenon, that is, in summer, the water body with high temperature and light density is stably distributed in the upper layer, and the water body with low temperature and high density sinks to the bottom of the reservoir (lake); in winter, the opposite is true. Water bodies with extremely low temperature (less than 4°C) and light density are distributed in the upper layer of the water body, while water bodies with higher temperature (close to 4°C) and high density sink to the bottom of the reservoir (lake), resulting in relative stillness between the upper and lower water bodies. This will reduce the dissolved oxygen in the lower water body, and it will be in a state of hypoxia, which will deteriorate the aquatic ecological environment. Nitrogen, phosphorus, organic matter, iron, manganese and other substances in the sediment will dissolve and release into the water body, deteriorating the water quality. Due to the small fluidity, the algae can stay in the surface water stably, receive sufficient light and reproduce in large numbers, which brings about the problem of eutrophication of the water body and affects the water quality. The release of sediment organic matter, nitrogen, phosphorus and other nutrients caused by the lack of oxygen at the bottom provides sufficient nutrients for algae and other phytoplankton, which intensifies the eutrophication of water bodies. The patent No. 200310117900.6 that the applicant of this patent applied for on December 23, 2003 is a vertically installed straight cylinder, the cylinder inlet is close to the bottom of the reservoir (lake), and the outlet is close to the water surface. An aeration chamber and an air chamber are attached to the lower end of the straight cylinder. The aeration chamber is filled with water, and the compressed air is continuously passed into the lower part of the aeration chamber in the form of small bubbles. The bubbles contact the water during the rising process of the aeration chamber. , to dissolve oxygen into the water. The air chamber is located on the upper part of the aeration chamber, which is a half-closed chamber to collect the air bubbles from the aeration chamber. When the air chamber is filled with air, the gas in the air chamber is released to the straight cylinder in an instant, forming a large air bomb, and Floating rapidly, pushes the water body in the cylinder to flow upward, so that the bottom water flows to the surface, and the surface water is sucked downward, forming a circulation exchange between the upper and lower water bodies, and achieving the purpose of mixing the upper and lower water layers. The pumping aerator can fully mix the surface water and the bottom water, destroy the stratification of the water body, and at the same time supply oxygen to the water body to improve the anoxic state of the water body. The prior art biological contact oxidation device can oxidize and decompose organic matter in water into harmless inorganic matter under aerobic conditions, and at the same time can oxidize dissolved iron and manganese in water, causing them to precipitate and remove them. The existing biological contact oxidation device needs to be installed in a specific pool, and a special air supply system is set up to pump the raw water into the pool for treatment, so the cost is relatively high.

Contents of the invention

The purpose of the present invention is to provide a water quality improvement device based on the prior art based on the combination of the above prior art by pumping aeration and enhancing biological contact oxidation. This device can not only fully mix surface water and bottom water, but also destroy water body stratification At the same time, oxygenate the water body, improve the anoxic state of the water body, and use the biological contact oxidation technology to degrade the organic matter, iron oxide and manganese in the consumed water under the condition of water pumping and aeration.

The idea of the present invention to solve the above-mentioned problems is: install a water pumping aerator and a biological contact oxidation device in combination in the reservoir (lake), the water pumping aerator is on the bottom, the biological contact oxidation device is on the top, and then add an air distribution device on the top of the water pumping aerator The system constitutes a water quality improvement device for water pumping aeration enhanced biological contact oxidation. In the pumping water aerator, the air bomb pushes the lower water body up and distributes it to the lower part of the biological contact oxidation device, while the air bomb is collected by the air distribution system and evenly distributed to the lower part of the biological contact oxidation device, and is sent to the biological contact oxidation device in the form of small bubbles. The filler is released, and the air bubbles continue to oxygenate the water body in the biological filler area, and agitate the water flow to provide dissolved oxygen and hydraulic conditions required for biological contact oxidation. The biological contact oxidation device is composed of biological filler and its fixed bracket. The biological filler is made of fibrous high molecular polymer elastic three-dimensional filler. The surface of the biological filler is an uneven structure. Under aerobic conditions, biofilm is attached to the surface of the filler, and the biofilm is mainly composed of bacteria, fungi, bacterial micelles and extracellular polymers produced by them. These microorganisms can use organic matter in water as nutrients for their metabolism, It can be oxidized and decomposed into harmless inorganic substances. At the same time, it can oxidize dissolved iron and manganese in water, causing them to precipitate and remove them.

In order to solve the technical problem of the present invention, the technical scheme of the present invention is: it comprises the pumping water aerator (4) that is vertically installed in water, the biological contact oxidation filler device (30), said water pumping aerator is below, biological contact oxidation The packing device is on top, and an air distribution system is arranged between the said pumping aerator and the biological contact oxidation packing device.

Said air distribution system is made up of air bomb collection chamber (6), pressure-stabilizing chamber (8), pressure-stabilizing pipe (23), air distribution dry pipe (10), air distribution branch pipe (11); said air bomb The collection chamber (6) is a cavity with an open lower end and is located at the upper end of the pumping aerator (4). Water pumping aerator water outlet (5); said plenum chamber (8) is located above the air bomb collection chamber (6), the two are connected and perforated therebetween; said plenum pipe (23) is a straight pipe , the lower end communicates with the plenum (8), and the upper end is provided with an outlet; the root of the air distribution main pipe (10) communicates with the plenum (8); the air distribution branch pipe (11) intersects the air distribution main pipe (10) And communicate, have eyelets on the air distribution branch pipe (11).

Said air bomb collection chamber (6) and plenum chamber (8) can be an integral structure, and the center is divided into upper and lower two chambers with perforated energy dissipation plate (7).

Said air bomb collection chamber (6) is a cylindrical cavity, and said plenum chamber (8) is a circular pie-shaped cavity.

Said pressure stabilizing pipe (23) lower end communicates with stabilizing chamber (8), and the upper end outlet is two, and a manual stop valve (27) is installed in an outlet, and an automatic air release valve (26) is installed in another outlet.

Said gas distribution dry pipe (10) communicates with the plenum chamber (8) with a rubber expansion joint (9).

Said air distribution main pipe (10) is at least two radial pipes, and air distribution branch pipe (11) is at least one annular pipe. The section of said gas distribution main pipe (10) is rectangular, and the gas distribution branch pipe (11) is a circular pipe.

Said biological contact oxidation device is composed of biological filler (14), upper and lower brackets (17, 13) and biological filler floats (20), suspended and fixed between the upper and lower brackets (17, 13), and the upper and lower brackets are fixed on the pumping aeration At the top of the device, the biological filler float (20) is used to provide buoyancy to ensure that the water-lifting aerator and the biological filler (14) can be suspended in the water, and the biological filler float (20) can be directly fixed on the water-lifting aerator and the upper bracket (17) on.

The plane of said upper and lower supports (17, 13) is a circle formed by splicing two semicircles, and said upper and lower supports (17, 13) are composed of at least one pair of radial angle steels and circumferential round steels (19). Support (17,13) is connected into a whole with contact angle steel (18).

The beneficial effects of the present invention are:

Since the present invention organically combines pumping aeration with biological contact oxidation, fully utilizes their respective functions and complementary effects, and realizes the optimal combination of water body oxygenation, mixing and biodegradation technologies. The water pumping aerator oxygenates the water body at the bottom where the water pressure is high and the oxygen content is low, and the oxygenation efficiency is high. The remaining air after oxygenation is released intermittently in the form of an air bomb, forming a plug flow, and the water lifting efficiency is high. The tail gas after water extraction is continued to be used for oxygenation and mixing in the biological filler area, eliminating the need for the gas supply system required for biological contact oxidation. The invention mixes the upper and lower water layers, solves the problem of stratification of water bodies, destroys the floating state of algae, forces them to migrate to deep water, and inhibits their growth; oxygenates the water body at the bottom, changes the anoxic environment, and improves the aquatic ecological environment at the bottom. It inhibits the dissolution and release of organic matter, phosphorus, ammonia nitrogen, iron, manganese and other substances in the sediment into the water; oxidizes and degrades the organic matter in the water, removes dissolved iron and manganese, and has the effect of stabilizing sediment and improving water quality. At the same time, the biological fillers installed on the upper layer of the water body objectively play a role in shading and blocking sunlight, which can greatly reduce the intensity of photosynthesis and reduce the productivity of algae.

Description of drawings

Fig. 1 is a structural diagram of an embodiment of the present invention.

In the figure: 1-compressed air pipe, 2-anchor pier, 3-inlet of water pumping aerator, 4-water pumping aerator, 5-exit of water pumping aerator, 6-air bomb collection chamber, 7-energy dissipation board, 8-plenum, 9-rubber expansion joint, 10-air distribution main pipe, 11-air distribution branch pipe, 12-fixing cable, 13-biological filler lower bracket, 14-biological filler, 15-bracket connector, 16- Cloth trachea float, 17-biological filler upper bracket, 18-angle steel, 19-round steel, 20-biological filler float, 21-flange, 22-lower sleeve, 23-voltage regulator tube, 24-upper sleeve, 25 -Buoy, 26-Automatic air release valve, 27-Manual shut-off valve, 28-Fixed plate, 29-Central rope, 30-Biological contact oxidation packing device

Detailed ways

The main body of the provided pumping aerator 4 is a straight cylinder, the inlet 3 of the pumping aerator is located at the bottom of the reservoir (lake), the outlet 5 of the pumping aerator is close to the surface layer of the reservoir (lake), and is located at the bottom of the biological contact oxidation device 30, The outlet 5 of the pumping aerator is in a horizontal direction. The pumping aerator 4 is fixed on the bottom of the reservoir (lake) with an anchor pier. The provided biological contact oxidation device 30 is composed of biological filler 14 , upper and lower supports 17 , 13 of biological filler and floater 20 of biological filler. The biological filler is a fibrous central rope type three-dimensional elastic filler, which is vertically suspended and fixed between the upper and lower supports of the biological filler. The planes of the upper and lower brackets are circular, and are composed of a series of radial angle steels 18 and circular round steels 19. The upper and lower brackets are connected by connecting angle steels to form a whole, and the brackets are fixed on the top of the pumping aerator. The said bio-fill float is a synthetic resin or buoy that can float in water, which is used to provide buoyancy to ensure that the water-lifting aerator and biological filler can be suspended in the water, and the bio-fill float can be directly fixed on the water-lifting aerator and filler on the upper support (the present invention is applicable to any biological contact oxidation device with filler structure). The air distribution system provided is composed of an air bomb collection chamber 6, a plenum chamber 8, a plenum pipe 23, an air distribution main pipe 10, and an air distribution branch pipe 11, and is located between the pumping aerator and the biological contact oxidation device. The air bomb collection chamber and the pressure stabilization chamber are located at the top of the water pumping aerator. The air bomb collection chamber is a cylindrical cavity with an open lower end and is located at the upper end of the water pumping aerator. The air bomb collection chamber is connected and communicated with the water pumping aerator. There is a gap between the two, that is, the water pumping aerator outlet 5; the plenum is a round cake-shaped cavity located above the air bomb collection chamber, the two are connected and there are perforations therebetween (the air bomb collection chamber and the plenum chamber are also It can be an integral structure, the middle is divided into upper and lower chambers by a perforated energy-dissipating plate, the lower chamber is an air bomb collection chamber, and the upper chamber is a pressure-stabilizing chamber). The regulator tube is a straight tube installed vertically, the bottom end communicates with the surge chamber, the top rises above the water surface, and there are two outlets at the top, one outlet is equipped with a manual stop valve, and the other outlet is equipped with an automatic air release valve. The air distribution main pipe is at least one radial pipe with a rectangular cross-section, arranged horizontally, the root is connected with the plenum, and the air distribution main pipe is connected with the plenum with a rubber expansion joint 9; the air distribution branch pipe is at least one The circular pipe intersects and communicates with the main pipe, and has a circular cross section. The upper side of the branch pipe is provided with holes with a diameter of 2mm.

The operation mode of the pumping aeration enhanced biological contact oxidation water quality improvement device is: compressed air is passed into the lower part of the pumping aerator to oxygenate the lower water body, and periodically form air bombs to push the water flow in the pumping aerator to rise. The rising water flows through the outlet and sprays horizontally to the surroundings, and distributes to the lower part of the biological contact oxidation filler, while the air bombs rush straight up into the air bomb collection chamber. The air in the air bomb collection chamber enters the plenum chamber through the perforated energy dissipation plate, and then distributes to the lower part of the biological filler area through the air distribution main pipe and branch pipe. The air in the branch pipe rises in the filling area in the form of small bubbles, and continues to oxygenate the water body in the filling area, providing the oxygen required for the biodegradation of the biofiller; The water body with poor water quality at the bottom is brought into the filler area, which plays the role of water distribution and mixing; this process is repeated, so that the polluted water quality can be continuously purified; in addition, when the bubbles rise, they stir the water flow, which promotes the shedding and renewal of the aging biofilm on the surface of the biological filler. Ensure biofilm activity.

Below in conjunction with accompanying drawing, the present invention is described in further detail:

As shown in Figure 1: the main body of the water pumping aerator 4 is a rigid straight cylinder, the inlet 3 of the water pumping aerator is trumpet-shaped, and the outlet 5 of the upper part of the water pumping aerator is duck tongue-shaped. The compressed air pipe 1 is connected to the lower end of the water pumping aerator 4 . The pumping aerator is fixed on the bottom of the reservoir (lake) with the anchor pier 2. The top of the water pumping aerator 4 is connected with a short straight tube with a half opening, the bottom is open, and the top has a top cover. The short straight tube is divided into upper and lower parts by a circular perforated energy dissipation plate 7 , the lower part is an air bomb collection chamber 6 , and the upper part is a plenum chamber 8 . The air bomb collection chamber 6 is fixed on the top of the water-raising aerator 4 with eight fixed plates 28, leaving a gap therebetween to be the water-raising aerator outlet 5. The sides of the plenum 8 protrude at least two radial gas distribution main pipes 10 around, and the air distribution main pipes 10 are connected with the plenum 8 with rubber expansion joints 9 to ensure communication therebetween. At least one annular gas distribution branch pipe 11 is arranged in connection with the gas distribution main pipe 10 . The air distribution main pipe 10 has a rectangular section, and the air distribution branch pipe 11 is a round pipe. The two ends of the air distribution main pipe 10 are suspended on the air distribution pipe float 16 with fixed cables 12 to ensure that the air distribution pipeline is in a horizontal state. Stretch out the pressure-stabilizing pipe 23 on the top plate of the voltage-stabilizing chamber 8, the voltage-stabilizing pipe 23 is connected with the 8 flanges 21 of the voltage-stabilizing chamber, and guarantee that both communicate. The top of the pressure-stabilizing pipe 23 is divided into two outlets with a tee, and a manual shut-off valve 27 is installed in one outlet, and an automatic air release valve 26 is installed in the other outlet. The outer side of the upper end of the pressure-stabilizing pipe 23 is welded and fixed with a cylindrical buoy 25, which bears the weight of the aerator together with the buoy of the aerator itself, so that it is suspended in the water. The planes of the upper bracket 17 and the lower bracket 13 of the biological filler are two semicircles spliced into a circle, which are welded by radial angle steel 18 and circumferential round steel 19, and the angle steel 18 is welded to the upper casing 24 and lower on casing 22. The casing corresponds to the bracket and also consists of two semicircles. The semicircular sleeve and bracket are spliced into a circle on the outside of the voltage stabilizing tube 23 and fixed on the stabilizing tube 23 . The inner diameter of the upper sleeve 24 is slightly larger than the outer diameter of the buoy 25, and the inner diameter of the lower sleeve 22 is slightly larger than the outer diameter of the stabilizing tube 23, so that the upper and lower brackets 17, 13 are fixed on the stabilizing tube 23 and there is appropriate room for movement. The upper and lower supports 17, 13 are connected as a whole with connecting angle steel 15. Biological filler 14 is fixed on upper and lower support 17,13 with central rope 29. The top of the filling area is equipped with a synthetic resin biological filling float 20 to bear the weight of the entire filling area.

During operation, the air enters the lower part of the water pumping aerator 4 through the compressed air pipe 1, and the water pumping aerator 4 uses the compressed air to oxygenate the water body, and forms air bombs intermittently to push the water to flow upward. The pumping aerator 4 sucks the bottom water body from 3 inlets of the pumping aerator, and sprays it horizontally through 5 outlets of the pumping aerator. The air bomb rising in the water pumping aerator 4 rushes into the air bomb collection chamber 6, and the gas enters the plenum chamber 8 through the holes on the energy dissipation plate 7, then passes through the air distribution main pipe 10, the air distribution branch pipe 11, and finally passes through the air distribution The small holes offered on the branch pipe 11 are released into the water in the form of small air bubbles. The small air bubbles rise into the biological packing area, oxygenate the packing area and drive the water flow into the packing area, agitating the water flow in the packing area. When the upward pulsating impact of the air bomb and the rising water flow of the pumping aerator is repeated, the air pressure in the air bomb collection chamber 6 will fluctuate, which will affect the uniformity of the air outlet. The effect of eliminating excessive air pressure and stabilizing the air pressure can be played with the energy dissipation plate 7 and the plenum chamber 8. If the pressure in the surge chamber 8 still has a pulsating high pressure, the automatic air release valve 26 on the top of the surge tube 23 will automatically open to vent, and will automatically close after the pressure drops. If the area of the biofiller area is large and the required gas volume is large, after all the gas in the gas bomb collection chamber 6 has been released and the next gas bomb has not arrived, the water flow in the ascending tube will enter the gas distribution pipeline and flow to the gas distribution pipe. until the next air bomb enters the air bomb collection chamber 6, and the gas distribution pipeline releases the gas again. If the area of the biological filler area is small and the required gas volume is small, when the next gas bomb arrives, there will still be more gas in the gas bomb collection chamber 6 that has not been released, and the excess gas will be released from the outlet of the canard-shaped water pumping aerator. 5 overflow, when the amount of overflowing gas is large, it will wash away the biological filler too much. Therefore, excess gas should be released safely, which can be adjusted by opening the manual shut-off valve 27 on the top of the pressure regulator pipe. After the biological contact oxidation filler 14 is installed in water and operated for a period of time, a layer of biofilm will grow on the surface of the filler 14 under the conditions of dissolved oxygen, hydraulic conditions and nutrients. The biofilm is composed of aerobic bacteria and their secretions. Aerobic bacteria oxidize and decompose organic matter in water, oxidize and precipitate dissolved iron and manganese, and purify water quality. After long-term operation, the old bacteria will gradually lose their activity and die, and the biofilm will age, while new bacteria will gradually grow to renew the biofilm. Proper water flushing can help the old biofilm fall off, which is conducive to the renewal of biofilm.

Claims (10)

1, a kind of reinforced biological contacting oxidation water correction apparatus, it comprises the aerator that pumps up water (4), the bio-contact oxidation filler unit (30) that vertically is installed in the water, the said aerator that pumps up water is following, the bio-contact oxidation filler unit is characterized in that last: said aerator and the bio-contact oxidation filler unit of pumping up water is provided with gas distribution system between the two.

2, reinforced biological contacting oxidation water correction apparatus according to claim 1 is characterized in that: said gas distribution system is made up of gas bullet collecting chamber (6), pressure stabilizing chamber (8), voltage stabilizing tube (23), gas distribution main (10), gas distributionbranch pipe (11); Said gas bullet collecting chamber (6) is the cavity of lower ending opening, is positioned at the upper end of the aerator that pumps up water (4), and gas bullet collecting chamber (6) links to each other with the aerator that pumps up water (4) and communicates, and leaves the gap aerator water outlet (5) that promptly pumps up water between the two; Said pressure stabilizing chamber (8) is positioned at gas bullet collecting chamber (6) top, and both link to each other and are provided with perforation therebetween; Said voltage stabilizing tube (23) is a straight tube, and the lower end communicates with pressure stabilizing chamber (8), and the upper end is provided with outlet; Gas distribution main (10) root of saying communicates with pressure stabilizing chamber (8); Gas distributionbranch pipe (11) intersects with gas distribution main (10) and communicates, and gas distributionbranch pipe has eyelet on (11).

3, reinforced biological contacting oxidation water correction apparatus according to claim 2 is characterized in that: said gas bullet collecting chamber (6) and pressure stabilizing chamber (8) are an one-piece construction, and middle energy dissipating plate (7) with perforation is separated into two Room up and down.

4, according to claim 2 or 3 described reinforced biological contacting oxidation water correction apparatus, it is characterized in that: said gas bullet collecting chamber (6) is a circular cylindrical cavity, and said pressure stabilizing chamber (8) is the patty cavity.

5, reinforced biological contacting oxidation water correction apparatus according to claim 2, it is characterized in that: said voltage stabilizing tube (23) lower end communicates with pressure stabilizing chamber (8), the upper end outlet is two, hand stop valve (27) is installed in an outlet, and automatic snifting valve (26) is installed in another outlet.

6, reinforced biological contacting oxidation water correction apparatus according to claim 2 is characterized in that: said gas distribution main (10) communicates with pressure stabilizing chamber (8) with rubber expansion joint (9).

7, reinforced biological contacting oxidation water correction apparatus according to claim 2 is characterized in that: said gas distribution main (10) is an at least one looped pipeline at least two radial pipelines, gas distributionbranch pipe (11).

8, reinforced biological contacting oxidation water correction apparatus according to claim 7 is characterized in that: said gas distribution main (10) section is a rectangle, and gas distributionbranch pipe (11) is a circular pipe.

9, reinforced biological contacting oxidation water correction apparatus according to claim 1, it is characterized in that: said bio-contact oxidation device is made up of biologic packing material (14), last lower bracket (17,13) and biologic packing material float (20), suspension is fixed between the lower bracket (17,13), last lower bracket is fixed on the aerator top of pumping up water, said biologic packing material float (20) is used to provide buoyancy, assurance pump up water aerator and biologic packing material (14) can suspend with water in, biologic packing material float (20) can be directly fixed on pump up water aerator and the upper bracket (17).

10, reinforced biological contacting oxidation water correction apparatus according to claim 9, it is characterized in that: said upward lower bracket (17,13) plane is two circles that semicircle is spliced into, said go up lower bracket (17,13) by at least one pair of radially angle steel and hoop round steel (19) connect and form, last lower bracket (17,13) connects into an integral body with getting in touch angle steel (18).

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