CN209618933U

CN209618933U - A kind of dissolved air flotation device for sewage treatment

Info

Publication number: CN209618933U
Application number: CN201920305142.7U
Authority: CN
Inventors: 郭新会
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2019-11-12
Anticipated expiration: 2029-03-12

Abstract

The utility model is a kind of dissolved air flotation device for sewage treatment, including dissolving and flotation tank, and the water outlet of dissolving is connected with dissolved air release by the defeated pipe of dissolved air water, and dissolved air release is located in flotation tank；The filler being made of several inclined plates being parallel to each other or inclined tube is equipped in flotation tank, dissolved air release is located at filler influent side, the Slag Scraping Device for striking off dross is equipped at the top of flotation tank, Slag Scraping Device side is dross storehouse, dissolving includes inner canister and the outer tank for surrounding inner canister, outer tank is located at inner canister top, dissolved air release includes outgassing storehouse and surge bunker setting up and down, the utility model utilizes shallow pool principle caused by filler, while enhancing the removal rate to the suspended matter in sewage, the volume of flotation tank be significantly increased will not；Dissolving can produce eddy flow, increase molten gas ability, thus removal ability of the enhancing to suspended matter in water；Dissolved air release can remove blocking, prevent hang-up.

Description

A kind of dissolved air flotation device for sewage treatment

Technical field

The utility model relates to technical field of sewage more particularly to a kind of air-dissolving air-float dresses for sewage treatment It sets.

Background technique

Air floating water purification technology is to develop rapidly within nearly 30 years a kind of solid-liquid separation technique, and principle is under elevated pressure It dissolves in air in water, then discharges air under reduced pressure, generate a large amount of micro-bubbles, the phase interaction of micro-bubble and particulate matter With, including the complex processes such as absorption, flocculation and hydrodynamics.Make bubble adhesion on suspended particulate, forms whole specific gravity less than 1 Mixture form dross since buoyancy is greater than gravity mixture floating to the water surface, clear water then flows downward, and collects dross respectively And clear water, it realizes and is separated by solid-liquid separation, sewage is purified.In water treatment field, air floating water purification technology is at home and abroad applied very Extensively.

Air-dissolving air-float processing generally as advanced treatment of wastewater preliminary processes, presently, there are main problem be, for The removal rate of suspended matter in sewage is still relatively low, so that the subsequent processing heavy load of sewage, if it is possible at sewage It manages and removes more suspended matters early period, then the burden of sewage subsequent processing stage will mitigate significantly.

Summary of the invention

The utility model aims to solve the problem that the deficiencies in the prior art, and provides a kind of air-dissolving air-float dress for sewage treatment It sets.

In order to achieve the above object, the utility model adopts the following technical solutions: a kind of air-dissolving air-float for sewage treatment The water outlet of device, including dissolving and flotation tank, dissolving is connected with dissolved air release, dissolved air release by the defeated pipe of dissolved air water In flotation tank；

Be equipped with the filler being made of several inclined plates being parallel to each other or inclined tube in flotation tank, dissolved air release be located at filler into Water side, flotation tank top are equipped with the Slag Scraping Device for striking off dross, and Slag Scraping Device side is dross storehouse, and dross orlop portion is equipped with dross Outlet, dross outlet are equipped with valve, and the Slag Scraping Device other side is that clear water exports storehouse, and clear water exports one side bottom of storehouse and flotation tank clear water Outlet, another side bottom are equipped with clear water efferent duct, are communicated with return pipe on clear water efferent duct, return pipe be equipped with valve and Back water pump, flotation tank is in filler influent side and is respectively arranged below with the first sludge discharging pipe and the second sludge discharging pipe, and two sludge go out Valve is equipped on pipe, flotation tank is additionally provided with original water inlet in filler influent side, and original water inlet is connected with the defeated pipe of raw water, the defeated pipe of raw water Be equipped with raw water pump, be also connected with flocculant storehouse on the defeated pipe of raw water, flocculant the top of the warehouse be equipped with flocculant feed opening and tap water into Mouthful, running water inlet is connected with the first branch pipe of tap water, the pipeline and tap water first that flocculant orlop portion is connected to the defeated pipe of raw water Valve is equipped on branch pipe, the flocculant in flocculant storehouse is aluminium polychloride；

The water inlet of dissolving is connected with water inlet pipe, and water inlet pipe is connect by three-way connection with return pipe, and three-way connection is remaining Interface be connected with the second branch pipe of tap water, the second branch pipe of tap water is equipped with valve, the second branch pipe of tap water and tap water first The input end of branch pipe is connected to water main, and aeration tube is equipped in dissolving, and aeration tube stretches out dissolving and is connected with air compression Machine.

It is more steady to flow the clear water of flotation tank clear water output outflow, the settlement action of Turbulent Flow Effects filler is avoided, One riser is set in clear water output storehouse, and the clear water efferent duct that flotation tank clear water output and clear water export storehouse is located at riser two Side, that is to say, that the water for flowing out flotation tank clear water output, which will cover, can just flow into clear water efferent duct at the top of riser, generate buffering Effect, turbulent flow of preventing.

To reduce cost, the Slag Scraping Device is the most commonly seen chain-plate type Slag Scraping Device in this field.

To guarantee that filler can make suspended particle rise and settle as early as possible, increase filler surface product, the filler is hexagonal The cellular inclined tube filler of shape.

Dissolving includes inner canister and the outer tank for surrounding inner canister, and outer tank is located at inner canister top, and one upper lateral part of outer tank is equipped with opening, This opening is the water inlet of dissolving；Inner canister bottom side is equipped with opening, this opening is the water outlet of dissolving；Inner canister quilt Spiral is equipped with inlet opening on the side wall that outer tank is surrounded, and inlet opening is all tilted in vertical and horizontal direction, and is inclined from outer tank to inner canister Obliquely, rubber pad is equipped at the top of inner and outer tank, compressing at the top of rubber pad has gland, and gland is connected by bolt and nut and outer tank It connects, through-hole is equipped in the middle part of gland and rubber pad, aeration tube passes through through-hole and protrudes into inner canister and be located at inner canister top, aeration tube and pressure Lid passes through seal with elastometic washer, and the aeration tube outside dissolving is connected with air compressor outlet, the aeration tube bottom end sealing in inner canister And side wall is evenly equipped with several stomatas, the design of the inlet opening of inner canister is so that the water into inner canister forms eddy flow, to greatly enhance Mixability with the gas sprayed in stomata.

Outer tank height is the 1/3-1/2 of inner canister, can guarantee that the water and gas in inner canister have sufficient mixed process in this way.

To guarantee the water in inner canister not via overhead reflux to outer tank, inner canister top surface is higher by 1-2 millimeters of outer tank top surface, this Sample, when gland is connect with outer tank, inner canister is embedded in rubber pad, guarantees leakproofness.

Dissolved air release includes outgassing storehouse and surge bunker setting up and down, and diaphragm plate, diaphragm plate middle part are equipped in outgassing storehouse Equipped with outgassing hole, through-hole is equipped in the middle part of outgassing silo roof wall, the defeated pipe of dissolved air water passes through through-hole and diaphragm plate is affixed, and the defeated pipe of dissolved air water It is connected to outgassing hole, is equipped with adjusting transverse slat moving up and down in outgassing storehouse below diaphragm plate, diaphragm plate bottom surface and adjusting are horizontal Plate top surface is staggeredly equipped with protrusion, and staggered to convex to form outgassing channel, outgassing channel is connected to outgassing hole, outgassing storehouse side bottom Equipped with several molten gas liberation ports, adjusts transverse slat bottom and be equipped with piston rod, piston rod slides through outgassing orlop wall and protrudes into adjusting In storehouse, by seal with elastometic washer, surge bunker is divided into two chambers up and down by the fixed plate in the middle part of itself for piston rod and outgassing orlop wall Body is set there are two piston on the piston rod in surge bunker, and two pistons are located in upper and lower cavities, and piston rod and fixed plate are logical Seal with elastometic washer is crossed, spring is equipped between the piston and fixed plate on top, the side wall of lower chamber, which is equipped with, adjusts port, and adjusts Port is located between the piston and fixed plate of lower part, adjusts port and is connected with adjusting tracheae, adjusts tracheae and air compressor exports It is connected, adjusts tracheae and be equipped with valve and a relief tube, also be provided with valve on relief tube, if there is suspended matter in flotation tank to block Outgassing channel, the openable valve adjusted on tracheae, moves down the piston of lower part, so that adjusting transverse slat be made to move down, increases outgassing Channel latus rectum goes out the suspended matter for blocking outgassing channel, closes the valve adjusted on tracheae later, opens the valve on relief tube Door is deflated, and is adjusted transverse slat and is moved up under the action of the spring, is restored normal, for the generation for avoiding stopping state, can periodically be opened adjusting Valve on tracheae repeats a upper process, it is noted that adjusting the time that the valve on tracheae is kept open must not exceed 5 seconds.

To make load and the treatment effeciency of flotation tank reach balance, the ratio between the flow of the flow and the defeated pipe of raw water of return pipe is 10%-30% is optimal with 30%.

The beneficial effects of the utility model are: the utility model is enhanced using shallow pool principle caused by filler in sewage Suspended matter removal rate while, the volume of flotation tank be significantly increased will not；Dissolving can produce eddy flow, increase molten Gas ability, thus removal ability of the enhancing to suspended matter in water；Dissolved air release can remove blocking, prevent hang-up.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is dissolving and dissolved air release connection schematic diagram；

Fig. 3 is the structural schematic diagram of dissolved air release；

Fig. 4 is vertical view distribution schematic diagram of the inlet opening in dissolving inner canister；

Fig. 5 is the inclined tube filler schematic diagram of hexagonal cell shape；

In figure: the defeated pipe of 1- raw water；2- flocculant storehouse；The first branch pipe of 3- tap water；4- water main；5- tap water second Branch pipe；6- water inlet pipe；7- return pipe；8- dross storehouse；9- Slag Scraping Device；10- clear water exports storehouse；11- riser；12- clear water efferent duct； 13- filler；14- flotation tank；The second sludge discharging pipe of 15-；The first sludge discharging pipe of 16-；17- dissolved air release；18- dissolved air water is defeated Pipe；The outlet of 19- dross；20- dissolving；21- air compressor；22- gland；23- rubber pad；24- outer tank；25- inner canister；26- Inlet opening；27- aeration tube；28- adjusts tracheae；29- relief tube；30- outgassing storehouse；31- surge bunker；32- outgassing hole；33- tabula Plate；34- outgassing channel；35- adjusts transverse slat；The molten gas liberation port of 36-；37- piston rod；38- piston；39- spring；40- fixed plate；

Attached drawing in the utility model is all schematic diagram, and size does not represent actual size；

It is described in detail below with reference to the embodiments of the present invention referring to attached drawing.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and examples:

As shown in fig. 1~fig. 5, a kind of dissolved air flotation device for sewage treatment, including dissolving 20 and flotation tank 14, The water outlet of dissolving 20 is connected with dissolved air release 17 by the defeated pipe 18 of dissolved air water, and dissolved air release 17 is located in flotation tank 14；

The filler 13 being made of several inclined plates being parallel to each other or inclined tube is equipped in flotation tank 14, dissolved air release 17 is located at 13 influent side of filler, the Slag Scraping Device 9 for striking off dross is equipped at the top of flotation tank 14, and 9 side of Slag Scraping Device is dross storehouse 8, dross 8 bottom of storehouse is equipped with dross outlet 19, and dross outlet 19 is equipped with valve, and 9 other side of Slag Scraping Device is that clear water exports storehouse 10, clear water output 10 1 side bottom of storehouse is connected to 14 clear water output of flotation tank, and another side bottom is equipped with clear water efferent duct 12, on clear water efferent duct 12 It is communicated with return pipe 7, return pipe 7 is equipped with valve and back water pump, and flotation tank 14 is in 13 influent side of filler and is respectively arranged below with First sludge discharging pipe 16 and the second sludge discharging pipe 15, valve is equipped on two sludge discharging pipes, and flotation tank 14 is intake in filler 13 Side is additionally provided with original water inlet, and original water inlet is connected with the defeated pipe 1 of raw water, and the defeated pipe 1 of raw water is equipped with raw water pump, also connects on the defeated pipe 1 of raw water There is a flocculant storehouse 2, be equipped with flocculant feed opening and running water inlet at the top of flocculant storehouse 2, running water inlet is connected with tap water the One branch pipe 3 is equipped with valve on the pipeline and the first branch pipe of tap water 3 that 2 bottom of flocculant storehouse is connected to the defeated pipe 1 of raw water, flocculates Flocculant in agent storehouse 2 is aluminium polychloride；

The water inlet of dissolving 20 is connected with water inlet pipe 6, and water inlet pipe 6 is connect by three-way connection with return pipe 7, three-way connection Remaining interface is connected with the second branch pipe of tap water 5, and the second branch pipe of tap water 5 is equipped with valve, the second branch pipe of tap water 5 and originally The input end of the first branch pipe of water 3 is connected to water main 4, is equipped with aeration tube 27 in dissolving 20, aeration tube 27 stretches out molten gas Tank 20 is connected with air compressor 21.

To keep the clear water flowing of 14 clear water output of flotation tank outflow more steady, the sedimentation of Turbulent Flow Effects filler 13 is avoided to make With, it is exported in clear water and a riser 11 is set in storehouse 10, the clear water efferent duct 12 of 14 clear water output of flotation tank and clear water output storehouse 10 It is located at 11 two sides of riser, that is to say, that the water for flowing out 14 clear water output of flotation tank will cover 11 top of riser and can just flow into Clear water efferent duct 12 generates buffering effect, turbulent flow of preventing.

To reduce cost, the Slag Scraping Device 9 is the most commonly seen chain-plate type Slag Scraping Device in this field.

To guarantee that filler 13 can make suspended particle rise and settle as early as possible, increase 13 surface area of filler, the filler 13 For the inclined tube filler of hexagonal cell shape.

Dissolving 20 includes inner canister 25 and the outer tank 24 for surrounding inner canister 25, and outer tank 24 is located at 25 top of inner canister, outer tank 24 1 Upper lateral part is equipped with opening, this opening is the water inlet of dissolving 20；25 bottom side of inner canister is equipped with opening, this opening is as molten The water outlet of gas tank 20；Spiral is equipped with inlet opening 26 on the side wall that inner canister 25 is surrounded by outer tank 24, and inlet opening 26 is in vertical and water Square to all tilting, and diagonally downward from outer tank 24 to inner canister 25, rubber pad 23, rubber pad are equipped at the top of inner canister 25 and outer tank 24 23 tops, which compress, gland 22, and gland 22 is connect by bolt and nut with outer tank 24, is equipped in the middle part of gland 22 and rubber pad 23 logical Hole, aeration tube 27 pass through through-hole and protrude into inner canister 25 and be located at 25 top of inner canister, and aeration tube 27 is close by rubber ring with gland 22 It seals, the aeration tube 27 outside dissolving 20 is connected with the outlet of air compressor 21, the sealing of 27 bottom end of aeration tube and side in inner canister 25 Wall is evenly equipped with several stomatas, and the design of the inlet opening 26 of inner canister 25 is so that the water into inner canister 25 forms eddy flow, to increase The strong mixability with the gas sprayed in stomata.

24 height of outer tank is the 1/3-1/2 of inner canister 25, can guarantee that the water in inner canister 25 has sufficient mix with gas in this way Process.

To guarantee the water in inner canister 25 not via overhead reflux to outer tank 24,25 top surface of inner canister is higher by 24 top surface 1-2 of outer tank Millimeter guarantees leakproofness in this way, inner canister 25 is embedded in rubber pad 23 when gland 22 is connect with outer tank 24.

Dissolved air release 17 includes outgassing storehouse 30 setting up and down and surge bunker 31, is equipped with diaphragm plate 33 in outgassing storehouse 30, It is equipped with outgassing hole 32 in the middle part of diaphragm plate 33, through-hole is equipped in the middle part of 30 roof of outgassing storehouse, the defeated pipe 18 of dissolved air water passes through through-hole and tabula Plate 33 is affixed, and the defeated pipe 18 of dissolved air water is connected to outgassing hole 32, and being equipped with below diaphragm plate 33 in outgassing storehouse 30 can move up and down Adjusting transverse slat 35,33 bottom surface of diaphragm plate and adjust 35 top surface of transverse slat staggeredly is equipped with protrusion, it is staggered to convex to form outgassing channel 34, outgassing channel 34 is connected to outgassing hole 32, and 30 side bottom of outgassing storehouse is equipped with several molten gas liberation ports 36, adjusts 35 bottom of transverse slat Portion is equipped with piston rod 37, and piston rod 37 slides through 30 bottom wall of outgassing storehouse and protrudes into surge bunker 31, piston rod 37 and outgassing storehouse By seal with elastometic washer, surge bunker 31 is divided to by the fixed plate 40 in the middle part of itself for upper and lower two cavitys 30 bottom walls, in surge bunker 31 Piston rod 37 on set there are two piston 38, two pistons 38 are located in upper and lower cavities, and piston rod 37 and fixed plate 40 are logical Seal with elastometic washer to be crossed, spring 39 is equipped between the piston 38 and fixed plate 40 on top, the side wall of lower chamber, which is equipped with, adjusts port, And adjust port be located between the piston 38 and fixed plate 40 of lower part, adjust port be connected with adjust tracheae 28, adjust tracheae 28 and The outlet of air compressor 21 is connected, and adjusts tracheae 28 and is equipped with valve and a relief tube 29, also is provided with valve on relief tube 29, If there is suspended matter in flotation tank 14 to block outgassing channel 34, the openable valve adjusted on tracheae 28 makes under the piston 38 of lower part It moves, so that adjusting transverse slat 35 be made to move down, increases 34 latus rectum of outgassing channel, the suspended matter for blocking outgassing channel 34 is gone out, later The valve adjusted on tracheae 28 is closed, the valve opened on relief tube 29 is deflated, and it adjusts transverse slat 35 and is moved up under the effect of spring 39, Restore normal, for the generation for avoiding stopping state, can periodically open the valve adjusted on tracheae 28, repeat a upper process, but want Note that adjusting the time that the valve on tracheae 28 is kept open must not exceed 5 seconds.

To make load and the treatment effeciency of flotation tank 14 reach balance, the flow of the flow of return pipe 7 and the defeated pipe 1 of raw water it Than being optimal with 30% for 10%-30%.

When the utility model is used, first opening the valve on the second branch pipe of tap water 5 and return pipe 7, exported to clear water After pipe 12 starts water outlet, the valve on the second branch pipe of tap water 5 is closed, returns Water Soluble Gas using return pipe 7.The utility model Also make flotation tank 14 while enhancing the removal rate to the suspended matter in sewage using shallow pool principle caused by filler 13 Volume will not be significantly increased；Dissolving 20 can produce eddy flow, increase molten gas ability, thus removal energy of the enhancing to suspended matter in water Power；Dissolved air release 17 can remove blocking, prevent hang-up.

The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by The limitation of aforesaid way, if the method concept of the utility model and the various improvement of technical solution progress are used, or without Improvement directly applies to other occasions, both is within the protection scope of the present invention.

Claims

1. a kind of dissolved air flotation device for sewage treatment, including dissolving and flotation tank, the water outlet of dissolving passes through molten The defeated pipe of air water is connected with dissolved air release, and dissolved air release is located in flotation tank；It is characterized in that,

The filler being made of several inclined plates being parallel to each other or inclined tube is equipped in flotation tank, dissolved air release is located at filler water inlet Side, flotation tank top are equipped with the Slag Scraping Device for striking off dross, and Slag Scraping Device side is dross storehouse, and dross orlop portion goes out equipped with dross Mouthful, dross outlet is equipped with valve, and the Slag Scraping Device other side is that clear water exports storehouse, and clear water exports one side bottom of storehouse and flotation tank Graceful Mouthful connection, another side bottom are equipped with clear water efferent duct, return pipe are communicated on clear water efferent duct, and return pipe is equipped with valve and returns Water pump, flotation tank is in filler influent side and is respectively arranged below with the first sludge discharging pipe and the second sludge discharging pipe, two sludge discharging pipes On be equipped with valve, flotation tank is additionally provided with original water inlet in filler influent side, and original water inlet is connected with the defeated pipe of raw water, on the defeated pipe of raw water Equipped with raw water pump, flocculant storehouse is also connected on the defeated pipe of raw water, flocculant the top of the warehouse is equipped with flocculant feed opening and running water inlet, Running water inlet is connected with the first branch pipe of tap water, the first branch pipe of pipeline and tap water that flocculant orlop portion is connected to the defeated pipe of raw water On be equipped with valve；

The water inlet of dissolving is connected with water inlet pipe, and water inlet pipe is connect by three-way connection with return pipe, and three-way connection is remaining to be connect Mouth is connected with the second branch pipe of tap water, and the second branch pipe of tap water is equipped with valve, the first branch pipe of the second branch pipe of tap water and tap water Input end be connected to water main, aeration tube is equipped in dissolving, aeration tube stretches out dissolving and is connected with air compressor.

2. the dissolved air flotation device according to claim 1 for sewage treatment, which is characterized in that dissolving includes inner canister With the outer tank for surrounding inner canister, outer tank is located at inner canister top, and it is the water inlet for dissolving that one upper lateral part of outer tank, which is equipped with opening,；It is interior Pot bottom side is equipped with opening, is the water outlet for dissolving；Spiral is equipped with inlet opening on the side wall that inner canister is surrounded by outer tank, into Water hole is all tilted in vertical and horizontal direction, and diagonally downward from outer tank to inner canister, and rubber pad, rubber are equipped at the top of inner and outer tank Compressing at the top of rubber mat has gland, and gland is connect by bolt and nut with outer tank, and through-hole, aeration tube are equipped in the middle part of gland and rubber pad Inner canister top is protruded into inner canister and is located at across through-hole, and aeration tube and gland pass through seal with elastometic washer, the aeration tube outside dissolving It is connected with air compressor outlet, the sealing of aeration tube bottom end and side wall in inner canister are evenly equipped with several stomatas.

3. the dissolved air flotation device according to claim 2 for sewage treatment, which is characterized in that outer tank height is inner canister 1/3-1/2.

4. the dissolved air flotation device according to claim 2 for sewage treatment, which is characterized in that dissolved air release includes Outgassing storehouse setting up and down and surge bunker are equipped with diaphragm plate in outgassing storehouse, are equipped with outgassing hole in the middle part of diaphragm plate, in outgassing silo roof wall Portion is equipped with through-hole, and the defeated pipe of dissolved air water passes through through-hole and diaphragm plate is affixed, and the defeated pipe of dissolved air water is connected to outgassing hole, in outgassing storehouse Adjusting transverse slat moving up and down is equipped with below diaphragm plate, diaphragm plate bottom surface and adjusting transverse slat top surface are staggeredly equipped with protrusion, staggeredly Convex to form outgassing channel, outgassing channel is connected to outgassing hole, outgassing storehouse side bottom be equipped with several molten gas liberation ports, adjust Transverse slat bottom is equipped with piston rod, and piston rod slides through outgassing orlop wall and protrudes into surge bunker, piston rod and outgassing orlop wall By seal with elastometic washer, surge bunker is divided into two cavitys up and down by the fixed plate in the middle part of itself, sets on the piston rod in surge bunker There are two piston, two pistons are located in upper and lower cavities, and piston rod and fixed plate pass through seal with elastometic washer, the piston on top Spring is equipped between fixed plate, the side wall of lower chamber, which is equipped with, adjusts port, and adjust port be located at the piston of lower part with admittedly It between fixed board, adjusts port and is connected with adjusting tracheae, adjust tracheae and be connected with air compressor outlet, adjust tracheae and be equipped with valve With a relief tube, valve also is provided on relief tube.

5. the dissolved air flotation device of sewage treatment is used for described in any one of -4 according to claim 1, which is characterized in that return water The ratio between flow and the flow of the defeated pipe of raw water of pipe are 10%-30%.

6. the dissolved air flotation device according to claim 5 for sewage treatment, which is characterized in that the flow of return pipe with The ratio between flow of the defeated pipe of raw water is 30%.