CN112374706A - A circulation denitrification device for food industry waste water - Google Patents
A circulation denitrification device for food industry waste water Download PDFInfo
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- CN112374706A CN112374706A CN202110051491.2A CN202110051491A CN112374706A CN 112374706 A CN112374706 A CN 112374706A CN 202110051491 A CN202110051491 A CN 202110051491A CN 112374706 A CN112374706 A CN 112374706A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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Abstract
The invention discloses a circulating denitrification device for food industrial wastewater, which comprises an aerobic pool, a deoxidation pool, an anoxic pool and a semiconductor refrigeration sheet, wherein the aerobic pool, the deoxidation pool and the anoxic pool perform denitrification treatment on the food industrial wastewater through circulating flow, the semiconductor refrigeration sheet comprises a hot end and a cold end, and the hot end is close to the deoxidation pool and is used for increasing the temperature of reactants in the deoxidation pool to reduce the solubility of oxygen; the cold end is close to the anoxic tank and used for reducing the temperature of reactants in the anoxic tank. The invention can improve the efficiency of denitrification reaction and the nitrogen removal rate of the food industry wastewater.
Description
Technical Field
The invention relates to the field of treatment of food industrial wastewater, in particular to a circular denitrification system for food industrial wastewater and a circular denitrification device for food industrial wastewater.
Background
The nitrogen content of the general waste water of food industry is very high. With the increase of the national requirements for the discharge of industrial wastewater, when the organic pollution of the food industry wastewater is restrained, the nitrogen pollution becomes a main environmental problem, and the food industry wastewater needs to be subjected to denitrification treatment.
The currently common denitrification method comprises A/O biological denitrification treatment, the A/O biological denitrification treatment generally comprises ammoniation treatment, nitrification treatment and denitrification treatment, the ammoniation treatment is a process of converting organic nitrogen into ammonia nitrogen by ammoniation bacteria under an aerobic condition, and the reaction process is as follows: RCHNH2COOH+O2→RCOOH+CO2+NH3(ii) a The nitrification treatment is a process that nitrifying bacteria convert ammonia nitrogen into nitrate under the aerobic condition, and the reaction process is as follows: NH (NH)4++2O2→NO3 -+H2O+2H+(ii) a The denitrification treatment is a process that denitrifying bacteria reduce nitrite into nitrogen under the anaerobic condition, and the reaction process comprises 5C (organic carbon) +2H2O+4NO3 -→2N2+4OH-+5CO2. Converting nitrogen into nitrogen through A/O biological denitrification treatment to realize the treatment of the nitrogen, wherein in the treatment process, nitrified liquid and part of sludge after nitrification treatment need to flow back to a denitrification treatment section for treatment; because the nitrification treatment is carried out under aerobic conditions, the nitrified liquid is often rich in a large amount of oxygen, while the denitrification treatment is carried out under anaerobic conditions, and the oxygen carried in the nitrified liquid influences the efficiency of the denitrification treatment.
The invention patent application with the publication number of CN108373201A discloses a method for treating ammonia nitrogen wastewater with a low carbon-nitrogen ratio and a special device thereof, wherein the device directly reflows reactants after nitration reaction into a denitrification reactor, and oxygen carried by the reactants after nitration reaction can influence the efficiency in the denitrification reactor.
Disclosure of Invention
In order to improve the efficiency of the denitrification reaction process and reduce the oxygen solubility in the confluent nitrified liquid, the invention provides a circular denitrification system for food industry wastewater, and the specific technical scheme is as follows.
A cyclic denitrification system for food industry wastewater comprises
The aerobic tank provides an oxygen-enriched environment for aerobic bacteria, and the aerobic bacteria convert nitrogen into nitrate in the aerobic tank;
the deoxidation tank is of an open structure, is communicated with the aerobic tank and is used for receiving reactants in the aerobic tank and reducing the solubility of oxygen in the reactants;
the anaerobic tank is communicated with the deoxidation tank and the aerobic tank respectively and is used for receiving reactants in the deoxidation tank, the anaerobic bacteria reduce nitrate into nitrogen in the anoxic tank and discharge the reactants in the anoxic tank into the aerobic tank;
the pressurizing part is arranged between the anoxic tank and the aerobic tank and used for pumping the reactant in the anoxic tank into the aerobic tank; and
the semiconductor refrigeration piece comprises a hot end and a cold end, wherein the hot end is close to the deoxidation tank and is used for increasing the temperature of reactants in the deoxidation tank to reduce the solubility of oxygen; the cold end is close to the anoxic tank and used for reducing the temperature of reactants in the anoxic tank.
Further, the system also comprises a power generation part, wherein the power generation part comprises a first impeller part and a second impeller part, the first impeller part is arranged between the aerobic pool and the deoxidation pool, the first impeller part comprises a first impeller, and the first impeller rotates under the impact of the pressurized reactant; the second impeller part comprises a second impeller, a magnet arranged on a second impeller blade and a coil arranged on the outer side of the second impeller, the second impeller is in transmission connection with the first impeller, and the magnet rotates along with the second impeller to enable the coil to cut a magnetic induction line to generate electricity; the coil is connected with the semiconductor refrigerating piece and supplies power to the semiconductor refrigerating piece.
Further, the system also comprises an aeration part which is arranged in the aerobic tank and provides oxygen for the aerobic tank.
Has the advantages that: 1. according to the circulating denitrification system provided by the invention, before the reactant subjected to nitrification treatment flows back into the anoxic tank, the reactant is heated in the deoxidation tank under the open condition, so that the solubility of oxygen in the reactant in the deoxidation tank is reduced, and the denitrification treatment efficiency in the anoxic tank is improved. The invention enables the aerobic pool, the deoxidation pool and the anoxic pool to form the circular and reciprocating flow, thereby leading the nitrogen in the waste water of the food industry to be removed more thoroughly.
2. According to the circulating denitrification system provided by the invention, the semiconductor refrigeration sheet is adopted to heat the reactant in the deoxidation tank, meanwhile, the semiconductor refrigeration sheet not only comprises a hot end but also comprises a cold end, and the reactant in the anoxic tank is cooled by the cold end of the semiconductor refrigeration sheet, so that the denitrification reaction reaches a proper temperature, and the proper temperature of the denitrification reaction is 20-35 ℃.
3. The first impeller is arranged between the aerobic tank and the deoxidation tank, the pressure increased by pumping the reactants into the aerobic tank by the pressurization part is utilized, the first impeller is driven to rotate when the reactants are discharged into the deoxidation tank, the first impeller rotates to drive the second impeller to rotate, the magnet rotates, the coil performs cutting magnetic induction line motion, and therefore the semiconductor refrigeration piece is powered, and the utilization rate of energy is improved. When the reactant is pumped into the aerobic tank by the pressure pump, on one hand, the circulating power is provided for the circulating denitrification system, and on the other hand, the solubility of oxygen in the aerobic tank is increased through pressurization, so that the nitration reaction efficiency is improved.
The invention also provides a circular denitrification device for the food industrial wastewater, which reduces the oxygen solubility in the confluence nitrifying liquid and realizes the circular treatment of the food industrial wastewater, and the specific technical scheme is as follows:
a cyclic denitrification device for food industry wastewater comprises
The first shell comprises a first cavity with an open top end, and a feeding hole and a discharging hole which are communicated with the first cavity are respectively connected to the first shell;
the second shell is arranged in the first shell and comprises a second cavity and a third cavity which are separated from each other, the second shell further comprises a first side wall and a second side wall, and the second cavity is wrapped by the first side wall; the second cavity is positioned above the third cavity, the top of the second cavity is communicated with the first cavity, and a pressure pump for pumping reactants to the third cavity is arranged between the second cavity and the third cavity; the second side wall wraps the first side wall, and a fourth cavity surrounding the second cavity is arranged between the second side wall and the first side wall;
an aeration device for providing oxygen to the third cavity; and
the semiconductor refrigeration piece is arranged in the fourth cavity and comprises a hot end and a cold end, the hot end is attached to the second side wall, and the cold end is attached to the first side wall;
the second cavity is an anoxic pond and provides an anaerobic environment for anaerobic bacteria; the third cavity is an aerobic tank and provides an oxygen-enriched environment for aerobic bacteria; the first cavity is a deoxidation pool, and the solubility of oxygen in reactants is reduced.
Furthermore, a fifth cavity communicated with the first cavity is arranged at the bottom of the second shell, a first impeller is arranged in the fifth cavity, the third cavity is communicated with the fifth cavity through a plurality of jet water channels, water outlets of the jet water channels face to blades of the first impeller, and the water outlets of the jet water channels are arranged along the circumferential direction of the first impeller; the bottom of first casing is provided with the third casing, be provided with the second impeller in the third casing, the second impeller is connected with first impeller transmission, the blade tip fixedly connected with magnet of second impeller, around there being the coil on the inside wall of third casing, the coil is connected with the semiconductor refrigeration piece, works as when the second impeller rotates, the coil is made and is cut magnetic induction line motion.
Further, the blades of the first impeller are quarter spherical curved plates; the blades of the second impeller are straight plates.
Furthermore, a part of the pipeline of the jet water channel extends into the fifth cavity to form a bent part, so that the bent part is perpendicular to the axial direction of the first impeller, the extending direction of the bent part is intersected with the outer contour line of the first impeller, and a water outlet is formed in the tail end of the bent part.
Furthermore, a plurality of liquid inlet channels communicated with the first cavity and the second cavity are arranged at the top end of the second shell, and each liquid inlet channel comprises a first channel, a second channel, a third channel and a check cavity; one end of the first channel is communicated with the first cavity, and the other end of the first channel is communicated with the non-return cavity; one end of the second channel is communicated with the non-return cavity, the other end of the second channel is communicated with the second cavity, one end of the third channel is communicated with the non-return cavity, the other end of the third channel is communicated with the second cavity, and the second channel and the third channel are arranged in an inverted V shape; the small ball capable of moving in the check cavity is arranged in the check cavity, and the diameter of the small ball is larger than that of the first channel, the second channel and the third channel respectively.
Furthermore, at least one spirally-surrounded groove is formed in the inner side wall of the first channel, the groove extends to the non-return cavity along the first cavity, and an included angle of 30-60 degrees is formed between the water outlet direction of the groove and the axial direction of the first channel.
Furthermore, 4 grooves spirally surrounded are arranged on the inner side wall of the first channel, and the interval between every two adjacent grooves is 90 degrees
Further, the aeration device comprises an air inlet pipeline and an aeration mechanism, wherein the air inlet pipeline sequentially penetrates through the first shell and the second shell and then extends into the third cavity; the aeration mechanism is arranged in the third cavity and comprises an air inlet cavity, a rotating shaft, a transmission blade and a diffusion blade; the rotating shaft is hollow, a plurality of through holes are formed in the side wall of the rotating shaft, one end of the rotating shaft is arranged in the air inlet cavity, the other end of the rotating shaft extends into the third cavity, the transmission blade is located in the air inlet cavity and fixedly connected with the rotating shaft, the diffusion blade is located in the third cavity and fixedly connected with the rotating shaft, and a plurality of aeration holes communicated with the through holes are formed in the diffusion blade; the air inlet pipeline is communicated with the air inlet cavity, and the air inlet direction of the air inlet channel is perpendicular to the axial direction of the rotating shaft.
Furthermore, one side of the diffusion blade, which is close to the second shell, is fixedly connected with a flexible scraper, and the flexible scraper is in contact with the second shell.
Has the advantages that: 1. according to the circulating denitrification device for the food industrial wastewater, the second shell is arranged in the first shell, the first cavity is arranged in the first shell, and the second cavity and the third cavity are arranged in the second shell, so that reactants in the circulating denitrification device can circularly flow under the action of the pressure pump and gravity to be treated, and the denitrification rate of the food industrial wastewater is improved.
2. According to the circulating denitrification device for the food industrial wastewater, the semiconductor refrigeration sheet is arranged in the fourth cavity in the second shell, so that the hot end of the semiconductor refrigeration sheet is attached to the second side wall, and reactants in the first cavity are heated; before the reactant of the first cavity flows into the second cavity, the oxygen solubility in the first cavity is reduced through heating, and the denitrification efficiency is improved; meanwhile, nitrogen and carbon dioxide generated by denitrification can be discharged to the outside when passing through the first cavity; the cold end of the semiconductor refrigeration piece is attached to the first side wall, and the reactant in the second cavity is cooled to reach the appropriate temperature of the denitrification reaction.
3. According to the circulating denitrification device for the food industry wastewater, the fifth cavity is arranged at the bottom of the second shell, the first impeller is arranged in the fifth cavity, a reactant in the third cavity drives the first impeller to rotate when being discharged into the fifth cavity through the jet water channel, the first impeller rotates to drive the second impeller to rotate so as to rotate the magnet, and the coil performs cutting magnetic induction line motion so as to supply power to the semiconductor refrigerating sheet, so that the utilization efficiency of energy is improved.
4. In the cyclic denitrification device for the food industry wastewater, gas sent into the gas inlet cavity by the gas inlet pipeline drives the transmission blade to drive the rotating shaft to rotate so as to drive the diffusion blade in the third cavity to rotate in the aeration process of the third cavity; meanwhile, the gas in the gas inlet cavity enters the hollow area of the rotating shaft through the through hole on the rotating shaft and enters the third cavity through the aeration hole of the diffusion blade to realize the aeration of the third cavity. The aeration of the third cavity is more sufficient through the rotation of the diffusion blades.
5. According to the circulating denitrification device for the food industry wastewater, the flexible scraper is arranged on one side, close to the second shell, of the diffusion blade, so that the diffusion blade is driven to be hung on the wall in the rotating process, and sludge is prevented from being adhered to the second shell.
6. According to the circulating denitrification device for the food industry wastewater, the top end of the second shell is provided with the plurality of liquid inlet channels communicated with the first cavity and the second cavity, each liquid inlet channel comprises the first channel, the second channel, the third channel and the non-return cavity, the non-return cavity is internally provided with the movable small balls, so that when reactants in the second cavity flow to the first cavity, the small balls block the first channel to prevent backflow, and when the reactants in the first cavity flow to the second cavity, at least the second channel or the third channel is ensured to be in a conduction state.
7. According to the circulating denitrification device for the food industrial wastewater, the first impeller and the diffusion blade are arranged, so that the sludge and liquid with strains are stirred in the rotating process of the first impeller or the diffusion blade, the reaction rate can be improved, and more sludge can be taken away when reactants in the first cavity converge to the second cavity.
Drawings
FIG. 1 is a schematic view of a cyclic denitrification system in an embodiment;
FIG. 2 is a schematic sectional view of a cyclic denitrification apparatus in an embodiment;
FIG. 3 is an enlarged view of area A of FIG. 2;
FIG. 4 is a schematic cross-sectional view of the first passage;
fig. 5 is a schematic view of an aeration apparatus.
Reference numerals: 100-an aerobic tank; 200-deoxidation tank; 300-an anoxic pond; 400-pressing part; 500-semiconductor refrigeration piece; 600-a power generation section; 1-a first housing; 2-a first cavity; 3-a feed inlet; 4-a discharge hole; 5-a second housing; 6-a first side wall; 7-a second side wall; 8-a second cavity; 9-a third cavity; 10-a pressure pump; 11-a fourth cavity; 12-an aeration device; 14-a hot end; 15-cold end; 16-a fifth cavity; 17-a first impeller; 18-jet water channel; 19-a third housing; 21-a second impeller; 22-a magnet; 23-a coil; 24-a rotating shaft; 25-a scaffold; 26-a liquid inlet channel; 27-a first channel; 28-a second channel; 29-a third channel; 30-a check cavity; 31-a pellet; 32-grooves; 33-an air inlet duct; 34-an air inlet cavity; 35-a rotating shaft; 36-a driving blade; 37-a diffuser vane; 38-a through hole; 39-aeration holes; 40-flexible scraper.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in FIG. 1, the present embodiment provides a cyclic denitrification system for food industry wastewater, comprising
The aerobic tank 100 provides an oxygen-rich environment for aerobic bacteria, and the aerobic bacteria convert nitrogen into nitrate in the aerobic tank 100;
the deoxidation tank 200 is of an open structure, is communicated with the aerobic tank 100, and is used for receiving the reactant in the aerobic tank 100 and reducing the solubility of oxygen in the reactant;
the anoxic tank 300 is respectively communicated with the deoxidation tank 200 and the aerobic tank 100, and is used for receiving reactants in the deoxidation tank 200, reducing nitrate into nitrogen in the anoxic tank 300 by anaerobic bacteria, and discharging the reactants in the anoxic tank 300 into the aerobic tank 100;
the pressurizing part 400 is arranged between the anoxic tank 300 and the aerobic tank 100, and is used for pumping the reactant in the anoxic tank 300 into the aerobic tank 100 by the pressurizing pump 10; and
the semiconductor refrigeration sheet 500 comprises a hot end 14 and a cold end 15, wherein the hot end 14 is close to the deoxidation tank 200 and is used for increasing the temperature of reactants in the deoxidation tank 200 to reduce the solubility of oxygen; the cold end 15 is adjacent to the anoxic tank 300 and is configured to reduce the temperature of the reactants in the anoxic tank 300.
In this embodiment, the food industry wastewater is denitrified based on an a/O biological denitrification treatment technology, and the reactant in the anoxic tank 300 is pumped into the aerobic tank 100 by the pressure pump 10, so that a circulating flow treatment is formed among the aerobic tank 100, the deoxidation tank 200 and the anoxic tank 300, thereby improving the denitrification rate of the food industry wastewater; meanwhile, the pressure is increased by increasing the pumping of reactants through the booster pump 10, so that the solubility of oxygen is increased, the oxygen-enriched environment required by the nitration reaction is enhanced, and the nitration treatment efficiency is increased. In the circulating treatment process, reactants in the aerobic tank 100 enter the deoxidation tank 200, the deoxidation tank 200 is heated through the hot end 14 of the semiconductor refrigeration sheet 500, so that the oxygen solubility of the reactants is reduced, and final products such as nitrogen, carbon dioxide and the like contained in the reactants are removed; the reactant with the lowered oxygen solubility enters the anoxic tank 300 again for denitrification treatment, nitrate is converted into nitrogen by denitrifying bacteria in an anoxic environment, the hot end 14 of the semiconductor refrigeration sheet 500 heats the reactant in the deoxidation tank 200, and the cold end 15 of the semiconductor refrigeration sheet cools the reactant in the anoxic tank 300 to enable the reactant to reach the appropriate temperature for denitrification reaction, wherein the appropriate temperature for denitrification reaction is 20-35 ℃.
In this embodiment, the aerobic tank 100, the deoxidation tank 200, and the anoxic tank 300 are circulated, thereby increasing the denitrification rate of the wastewater from the food industry. The hot end 14 of the semiconductor refrigeration plate 500 is used for heating the reactant in the deoxidation tank 200, so that the solubility of oxygen in the reactant is reduced, and final products such as nitrogen, carbon dioxide and the like are removed; the reactant in the anoxic tank 300 is cooled by the cold end 15 of the semiconductor refrigeration sheet 500 to provide proper temperature for denitrification reaction; the efficiency of the denitrification reaction in the anoxic tank 300 is improved by the above manner.
As shown in fig. 1, in the present embodiment, the system further includes a power generation unit 600, the power generation unit 600 includes a first impeller portion and a second impeller portion, the first impeller portion is disposed between the aerobic tank 100 and the deoxidation tank 200, the first impeller portion includes a first impeller 17, and the first impeller 17 rotates under the impact of the pressurized reactant; the second impeller part comprises a second impeller 21, a magnet 22 installed on the blade of the second impeller 21 and a coil 23 arranged outside the second impeller 21, the second impeller 21 is in transmission connection with the first impeller 17, and the magnet 22 rotates along with the second impeller 17 to enable the coil 23 to cut magnetic induction lines to generate electricity; the coil 23 is connected with the semiconductor chilling plate 500 and supplies power to the semiconductor chilling plate 500.
In this embodiment, the first impeller 17 is installed between the aerobic tank 100 and the deoxidation tank 200, the pressure of the reactant in the aerobic tank 100 is increased by the action of the pressure pump 10, when entering the deoxidation tank 200, the reactant impacts the blades of the first impeller 17 to rotate the first impeller 17, the first impeller 17 is in transmission connection with the second impeller 21 to drive the second impeller 21 to rotate, when the second impeller 21 rotates, the magnets 22 installed on the blades of the second impeller 21 correspondingly rotate, the magnetic field changes in the rotation process of the magnets 22, and the coils 23 passively cut magnetic induction lines to generate electricity, so as to provide electric energy for the semiconductor refrigeration sheets 500. The utilization rate of energy is improved through the mode.
As shown in fig. 1, in the present embodiment, an aeration section is provided in the aerobic tank 100 to aerate the aerobic tank 100, thereby providing an oxygen-rich environment to the aerobic tank 100.
Example 2
As shown in FIG. 2, the present embodiment provides a cyclic denitrification apparatus for wastewater of food industry, comprising
The device comprises a first shell 1, wherein the first shell 1 comprises a first cavity 2 with an open top end, and a feeding hole 3 and a discharging hole 4 which are communicated with the first cavity 2 are respectively connected to the first shell 1;
the second shell 5, the second shell 5 is arranged in the first shell 1, the second shell 5 comprises a second cavity 8 and a third cavity 9 which are separated, the second shell 5 further comprises a first side wall 6 and a second side wall 7, and the first side wall 6 wraps the second cavity 8; the second cavity 8 is positioned above the third cavity 9, the top of the second cavity 8 is communicated with the first cavity 2, and a pressure pump 10 for pumping reactants to the third cavity 9 is arranged between the second cavity 8 and the third cavity 9; the second side wall 7 wraps the first side wall 6, and a fourth cavity 11 surrounding the second cavity 8 is arranged between the second side wall 7 and the first side wall 6;
an aeration device 12, said aeration device 12 being adapted to provide oxygen to the third chamber 9; and
the semiconductor refrigeration piece 500 is installed in the fourth cavity 11, the semiconductor refrigeration piece 500 comprises a hot end 14 and a cold end 15, the hot end 14 is attached to the second side wall 7, and the cold end 15 is attached to the first side wall 6;
wherein, the second cavity 8 is an anoxic tank 300 for providing an anaerobic environment for anaerobic bacteria; the third cavity 9 is an aerobic tank 100 and provides an oxygen-enriched environment for aerobic bacteria; the first cavity 2 is a deoxidation tank 200, and the solubility of oxygen in reactants is reduced.
In the present embodiment, the second housing 5 is disposed inside the first housing 1, and the first chamber 2 between the first housing 1 and the second housing 5 is used as a deoxidation tank 200 to reduce the solubility of oxygen in the reactant. A second cavity 8 and a third cavity 9 are respectively arranged in the second shell 5, the second cavity 8 is used as an anoxic tank 300 to provide an anoxic environment for denitrification reaction, and the third cavity 9 is used as an aerobic tank 100 to provide an oxygen-rich environment for nitrification reaction; the reactant in the second cavity 8 is pumped into the third cavity 9 through the pressure pump 10, and the reactant among the first cavity 2, the second cavity 8 and the third cavity 9 circularly flows under the action of the matched gravity, so that the nitration reaction and the denitrification reaction are circularly carried out, and the treatment rate of nitrogen in the food industry wastewater is improved. The booster pump 10 pumps the reactant to the third chamber 9, so that the pressure is increased to improve the solubility of oxygen, and the efficiency of the nitration reaction in the third chamber 9 is further enhanced.
In this embodiment, the semiconductor chilling plate 500 is installed in the fourth cavity 11 in the second housing 5, so that the hot end 14 of the semiconductor chilling plate 500 is attached to the second side wall 7, the reactant in the first cavity 2 is heated, the solubility of oxygen in the reactant is reduced, and the final products, nitrogen and carbon dioxide, are sent out, when the reactant in the first cavity 2 enters the second cavity 8, the reactant with low oxygen solubility provides a more suitable environment for denitrifying bacteria, thereby improving the efficiency of denitrification treatment; the cold end 15 of the semiconductor refrigeration sheet 500 is attached to the first side wall 6, so that the reactant in the second cavity 8 is cooled, and an appropriate temperature is provided for the denitrification reaction, and generally speaking, the appropriate temperature of the denitrification reaction is 20-35 ℃.
As shown in fig. 2, in the present embodiment, a fifth cavity 16 communicated with the first cavity 2 is disposed at the bottom of the second casing 5, a first impeller 17 is disposed in the fifth cavity 16, the third cavity 9 and the fifth cavity 16 are communicated through a plurality of jet water channels 18, water outlets of the jet water channels 18 face the blades of the first impeller 17, and water outlets of the plurality of jet water channels 18 are arranged along the circumferential direction of the first impeller 17; the bottom of first casing 1 is provided with third casing 19, be provided with second impeller 21 in the third casing 19, second impeller 21 is connected with first impeller 17 transmission, the blade tip fixedly connected with magnet 22 of second impeller 21, it has coil 23 to wind on the inside wall of third casing 19, coil 23 is connected with semiconductor refrigeration piece 500, works as when second impeller 21 rotates, coil 23 makes cutting magnetic induction line motion.
In this embodiment, the bottom of the second casing 5 is connected to the first casing 1 through a plurality of brackets 25, so that a fifth cavity 16 is formed between the bottom of the second casing 5 and the first casing 1, the first impeller 17 is rotatably disposed in the fifth cavity 16, the first impeller 17 is in transmission connection with the rotating shaft 24, and the rotating shaft 24 extends outward from the bottom of the first casing 1 and is rotatably connected to the first casing 1 through a bearing. The bottom of the first shell 1 is also provided with a third shell 19, the second impeller 21 is arranged in the third shell 19, and the second impeller 21 is in transmission connection with a rotating shaft 24. When water in the third cavity 9 flows to the fifth cavity 16 through the jet water channel 18, the water flow impacts the first impeller 17, so that the first impeller 17 rotates to drive the second impeller 21 to rotate, the second impeller 21 rotates to drive the magnet 22 to rotate to generate magnetic field change, and the coil 23 passively cuts magnetic induction lines to generate current to supply power to the semiconductor chilling plate 500.
In the present embodiment, when the current generated by the coil 23 cutting the magnetic induction wire is not enough to heat or cool the reactant, the semiconductor cooling plate 500 can be powered by an external power source.
As shown in fig. 2, specifically, 6 jet water channels 18 are provided, the jet water channels 18 extend from the third cavity 9 to the fifth cavity 16, and a part of the pipeline of the jet water channel 18 extends into the fifth cavity 16 to form a curved portion, so that the curved portion is perpendicular to the axial direction of the first impeller 17, the extending direction of the curved portion intersects with the outer contour line of the first impeller 17, a water outlet is provided at the end of the curved portion, the water outlet faces the blades of the first impeller 17 through the curved portion, and the water outlets of the 6 jet water channels 18 are uniformly arranged in the circumferential direction of the first impeller 17 to drive the first impeller 17 to rotate.
In the present embodiment, in order to facilitate driving the first impeller 17 to rotate, the blades of the first impeller 17 are in the shape of quarter spherical curved plates; in order to ensure the stability of the magnetic field variation, the blades of the second impeller 21 are straight plates.
As shown in fig. 3, in the present embodiment, the top end of the second casing 5 is provided with a plurality of liquid inlet channels 26 communicating the first cavity 2 and the second cavity 8, and the liquid inlet channels 26 include a first channel 27, a second channel 28, a third channel 29 and a check cavity 30; one end of the first channel 27 is communicated with the first cavity 2, and the other end is communicated with the check cavity 30; one end of the second channel 28 is communicated with the non-return cavity 30, the other end of the second channel is communicated with the second cavity 8, one end of the third channel 29 is communicated with the non-return cavity 30, the other end of the third channel is communicated with the second cavity 8, and the second channel 28 and the third channel 29 are arranged in an inverted V shape; a small ball 31 which can move in the check cavity 30 is arranged in the check cavity 30, and the diameter of the small ball 31 is larger than that of the first channel 27, the second channel 28 and the third channel 29.
In this embodiment, by providing a plurality of liquid inlet channels 26 at the top end of the second casing 5, the reactant in the first cavity 2 enters the second cavity 8 through the liquid inlet channels 26 at the top end of the second casing 5 under the action of gravity. In order to prevent the liquid in the second cavity 8 from flowing back to the first cavity 2, the liquid inlet channel 26 comprises a first channel 27, a second channel 28, a third channel 29 and a check cavity 30; the first channel 27 is communicated with the check cavity 30 and the first cavity 2, the second channel 28 and the third channel 29 are respectively communicated with the check cavity 30 and the second cavity 8, and a small ball 31 is arranged in the check cavity 30; when the pressure pump pumps the reactant to the third cavity 9, the small ball 31 moves downwards under the action of the water flow pressure, so that the first channel 27 is communicated, and at least the second channel 28 or the third channel 29 can be communicated because the second channel 28 and the third channel 29 are arranged in an inverted V shape, so that the reactant enters the second cavity 8 from the first cavity 2; when the pressure pump stops pumping the reactant to the third chamber 9, the fluid pressure in the second chamber 8 is restored, and the ball 31 blocks the first channel 27 to prevent the reactant in the second chamber 8 from flowing back to the first chamber 2.
Specifically, as shown in fig. 4, 4 spirally-surrounding grooves 32 are arranged on the inner side wall of the first passage 27, the interval between adjacent grooves 32 is 90 °, the grooves 32 extend to the check cavity 30 along the first cavity 2, and the water outlet direction of the grooves 32 and the axial direction of the first passage 27 form an included angle of 30-60 °. The groove 32 is arranged, so that the water outlet of the groove 32 is staggered with the water outlet direction of the first channel 27, and the small ball 31 is rotated by the water flow in the direction of the groove 32, so that the sludge is prevented from being adhered between the water outlet end of the first channel 27 and the small ball 31.
As shown in fig. 5, the aeration device 12 includes an air inlet pipe 33 and an aeration mechanism, the air inlet pipe 33 sequentially passes through the first housing 1 and the second housing 5 and then extends into the third cavity 9; the aeration mechanism is arranged in the third cavity 9 and comprises an air inlet cavity 34, a rotating shaft 35, a transmission blade 36 and a diffusion blade 37; the rotating shaft 35 is hollow, a plurality of through holes 38 are formed in the side wall of the rotating shaft 35, one end of the rotating shaft 35 is arranged in the air inlet cavity 34, the other end of the rotating shaft extends into the third cavity 9, the transmission blade 36 is positioned in the air inlet cavity 34 and fixedly connected with the rotating shaft 35, the diffusion blade 37 is positioned in the third cavity 9 and fixedly connected with the rotating shaft 35, and a plurality of aeration holes 39 communicated with the through holes 38 are formed in the diffusion blade 37; the air inlet pipeline 33 is communicated with the air inlet cavity 34, and the air inlet direction of the air inlet channel is perpendicular to the axial direction of the rotating shaft 35.
In this embodiment, the air inlet direction of the air inlet pipe 33 is perpendicular to the axial direction of the rotating shaft 35, the airflow blown through the air inlet pipe 33 blows the driving blade 36 to rotate, the airflow enters the hollow area in the middle of the rotating shaft 35 through the through hole 38 formed in the rotating shaft 35 while pushing the driving blade 36 to rotate, and the diffusion blade 37 aerates the third cavity 9, so as to supplement the oxygen in the third cavity 9; the rotation of the driving blades 36 drives the diffusion blades 37 to rotate, so that the third chamber 9 is aerated more fully.
In the present embodiment, a flexible scraper 40 is fixedly connected to a side of the diffusion blade 37 close to the second housing 5, and the flexible scraper 40 is in contact with the second housing 5. The diffuser blades 37, during rotation, suspend the wall of the second casing 5 by means of the flexible scraper 40, avoiding the sludge from adhering to the side walls of the second casing 5.
In this embodiment, by arranging the rotating diffusion blade 37 in the third cavity 9 and the rotating first impeller 17 in the fifth cavity 16, sludge and liquid with bacteria are stirred in the rotation of the diffusion blade 37 and the rotation of the first impeller 17, which not only can improve the reaction rate, but also can bring away more sludge when the reactant in the first cavity 2 converges to the second cavity 8.
The circular denitrification device for the food industry wastewater provided by the embodiment enables the first cavity 2, the second cavity 8 and the third cavity 9 to form circular flow, so that the nitrification reaction and the denitrification reaction are carried out in a staggered mode, and the denitrification rate is improved. The hot end 14 of the semiconductor refrigerating sheet 500 heats the reactant in the first cavity 2, so that the solubility of oxygen in the reactant is reduced, a better oxygen-free environment is created for denitrifying bacteria of the denitrification reaction, and the efficiency of the denitrification reaction is improved; the reactant in the second cavity 8 is cooled by the cold end 15 of the semiconductor refrigeration sheet 500, and a proper temperature is provided for the denitrification reaction, so that the denitrification reaction efficiency is further improved. The first impeller 17 drives the second impeller 21 to rotate, so that the coil 23 performs cutting magnetic induction line motion to supply power to the semiconductor refrigeration sheet 500, and the utilization rate of energy is improved.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications can be made without departing from the spirit of the invention, and all the properties or uses are considered to be within the scope of the invention.
Claims (7)
1. The utility model provides a circulation denitrification device for food industry waste water which characterized in that: comprises that
The device comprises a first shell (1), wherein the first shell (1) comprises a first cavity (2) with an open top end, and a feeding hole (3) and a discharging hole (4) which are communicated with the first cavity (2) are respectively connected to the first shell (1);
the second shell (5), the second shell (5) is arranged in the first shell (1), the second shell (5) comprises a second cavity (8) and a third cavity (9) which are separated, the second shell (5) further comprises a first side wall (6) and a second side wall (7), and the second cavity (8) is wrapped by the first side wall (6); the second cavity (8) is positioned above the third cavity (9), the top of the second cavity (8) is communicated with the first cavity (2), and a booster pump (10) for pumping reactants to the third cavity (9) is arranged between the second cavity (8) and the third cavity (9); the second side wall (7) wraps the first side wall (6), and a fourth cavity (11) surrounding the second cavity (8) is arranged between the second side wall (7) and the first side wall (6);
an aeration device (12), said aeration device (12) being adapted to provide oxygen to the third chamber (9); and
the semiconductor refrigeration piece (500) is installed in the fourth cavity (11), the semiconductor refrigeration piece (500) comprises a hot end (14) and a cold end (15), the hot end (14) is attached to the second side wall (7), and the cold end (15) is attached to the first side wall (6);
wherein the second cavity (8) is an anoxic tank (300) for providing an anaerobic environment for anaerobic bacteria; the third cavity (9) is an aerobic tank (100) and provides an oxygen-enriched environment for aerobic bacteria; the first cavity (2) is a deoxidation tank (200) and reduces the solubility of oxygen in the reactants.
2. The recycling denitrification apparatus for wastewater of food industry according to claim 1, wherein: a fifth cavity (16) communicated with the first cavity (2) is arranged at the bottom of the second shell (5), a first impeller (17) is arranged in the fifth cavity (16), the third cavity (9) is communicated with the fifth cavity (16) through a plurality of jet water channels (18), water outlets of the jet water channels (18) face to blades of the first impeller (17), and water outlets of the jet water channels (18) are arranged along the circumferential direction of the first impeller (17); the bottom of first casing (1) is provided with third casing (19), be provided with second impeller (21) in third casing (19), second impeller (21) are connected with first impeller (17) transmission, the blade tip fixedly connected with magnet (22) of second impeller (21), it has coil (23) to wind on the inside wall of third casing (19), coil (23) are connected with semiconductor refrigeration piece (500), work as when second impeller (21) rotate, cutting magnetic induction line motion is made in coil (23).
3. The recycling denitrification apparatus for wastewater of food industry according to claim 2, wherein: the blades of the first impeller (17) are quarter spherical curved plates; the blades of the second impeller (21) are straight plate-shaped.
4. The recycling denitrification apparatus for wastewater of food industry according to claim 2, wherein: and a part of pipeline of the jet flow water channel (18) extends into the fifth cavity (16) to form a bent part, so that the bent part is vertical to the axial direction of the first impeller (17), the extending direction of the bent part is intersected with the outer contour line of the first impeller (17), and the tail end of the bent part is provided with a water outlet.
5. The recycling denitrification apparatus for wastewater of food industry according to claim 1, wherein: the top end of the second shell (5) is provided with a plurality of liquid inlet channels (26) communicated with the first cavity (2) and the second cavity (8), and each liquid inlet channel (26) comprises a first channel (27), a second channel (28), a third channel (29) and a check cavity (30); one end of the first channel (27) is communicated with the first cavity (2), and the other end of the first channel is communicated with the check cavity (30); one end of the second channel (28) is communicated with the check cavity (30), the other end of the second channel is communicated with the second cavity (8), one end of the third channel (29) is communicated with the check cavity (30), the other end of the third channel is communicated with the second cavity (8), and the second channel (28) and the third channel (29) are arranged in an inverted V shape; a small ball (31) capable of moving in the check cavity (30) is arranged in the check cavity (30), and the diameter of the small ball (31) is larger than that of the first channel (27), the second channel (28) and the third channel (29).
6. The recycling denitrification apparatus for wastewater of food industry according to claim 5, wherein: at least one spirally-surrounding groove (32) is formed in the inner side wall of the first channel (27), the groove (32) extends to the check cavity (30) along the first cavity (2), and an included angle of 30-60 degrees is formed between the water outlet direction of the groove (32) and the axial direction of the first channel (27).
7. The recycling denitrification apparatus for wastewater of food industry according to claim 5, wherein: the inner side wall of the first channel (27) is provided with 4 spirally surrounding grooves (32), and the adjacent grooves (32) are spaced by 90 degrees.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115872573A (en) * | 2023-02-15 | 2023-03-31 | 山东普旭富中节能环保科技有限公司 | Medicine waste water is with circulation nitrogen removal device that has deoxidation function |
| CN117142547A (en) * | 2023-10-30 | 2023-12-01 | 中国建筑第四工程局有限公司 | Low-carbon construction wastewater harmless treatment device |
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| CN115872573B (en) * | 2023-02-15 | 2023-06-20 | 山东普旭富中节能环保科技有限公司 | Medical waste water is with circulation nitrogen removal device that has deoxidization function |
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| CN117142547B (en) * | 2023-10-30 | 2024-01-09 | 中国建筑第四工程局有限公司 | Low-carbon construction wastewater harmless treatment device |
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