CN110606566B - Sludge fermentation coupling biological denitrification system - Google Patents
Sludge fermentation coupling biological denitrification system Download PDFInfo
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- CN110606566B CN110606566B CN201910942977.8A CN201910942977A CN110606566B CN 110606566 B CN110606566 B CN 110606566B CN 201910942977 A CN201910942977 A CN 201910942977A CN 110606566 B CN110606566 B CN 110606566B
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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
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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
Abstract
The invention provides a sludge fermentation coupling biological denitrification system. The sludge fermentation coupling biological denitrification system comprises a reaction mechanism, a water inlet mechanism, an aeration mechanism, a water bath mechanism, a stirring mechanism, a sensing mechanism and a detection mechanism, wherein the detection mechanism comprises a DO instrument body, a membrane frame, a liquid discharge pipe, a liquid discharge port, a first spring, a liquid storage chamber, a sealing plug and a fixed shell, the liquid exchange mechanism comprises an inner rod, an outer rod, a sealing column, a piston and a shell, and a cleaning mechanism, the cleaning mechanism comprises a conveying pipe, a sleeve, a fixing hole, a bump, a sponge wiper, a connecting frame and a second spring, the drainage mechanism comprises an electromagnetic valve, a water outlet, a fixing rod, a sphere, a rotating rod, a fluted disc, a water outlet, a rack, a sliding groove and a programmable PLC (programmable logic controller). The sludge fermentation coupling biological denitrification system provided by the invention has the advantages of convenience in replacing DO instrument filling liquid, convenience in cleaning a DO instrument ventilating film and capability of accurately controlling the dissolved oxygen range.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sludge fermentation coupling biological denitrification system.
Background
Nowadays, the eutrophication of the wastewater is increasingly serious, the nitrogen pollution is increasingly serious, and the research and development of a high-efficiency and low-consumption biological denitrification technology are imperative. At present, the denitrification effect of the urban sewage plant needs to be enhanced, the adjustment process of DO parameters is basically set by design experience, the optimal DO value of the treatment process is difficult to accurately control, and the realization of energy conservation and emission reduction is not facilitated. The dissolved oxygen concentration is taken as one of important influencing factors in biological denitrification of sewage, the denitrification efficiency can be effectively improved by controlling the dissolved oxygen concentration, the aims of improving the efficiency, saving energy and reducing the cost can be fulfilled, and more technical supports are provided for sewage treatment. In addition, the DO instrument is soaked in the muddy water mixture for a long time in the monitoring process, so that the sludge is attached to the breathable film at the front end of the DO instrument, the monitoring accuracy is influenced, the DO instrument generally needs to replace filling liquid once in half a month, and if the breathable film is frequently cleaned or the electrolyte is replaced, the working procedures are complicated, the internal biological environment of the reactor is influenced, and the research is not facilitated.
Therefore, it is necessary to provide a new sludge fermentation coupled biological denitrification system to solve the above technical problems.
Disclosure of Invention
In order to solve the technical problems, the invention provides the sludge fermentation coupling biological denitrification system which is convenient for replacing filling liquid of a DO instrument, cleaning a ventilated membrane of the DO instrument and accurately controlling the dissolved oxygen range.
The invention provides a sludge fermentation coupling biological denitrification system, which comprises: the device comprises a reaction mechanism, a water inlet mechanism, an aeration mechanism, a water bath mechanism, a stirring mechanism, a sensing mechanism, a detection mechanism, a liquid changing mechanism, a cleaning mechanism, a drainage mechanism and a programmable PLC (programmable logic controller);
the reaction mechanism comprises a cover, a reaction cavity and a hollow layer, the reaction cavity is of a hollow U-shaped structure, the hollow part is the hollow layer, and the top of the reaction cavity is connected with the cover in a clamping manner; the bottom of the reaction mechanism is communicated with a sewage draining outlet which penetrates through the reaction cavity and the hollow layer;
the water inlet mechanism is arranged at the top of the reaction cavity; preferably, the water inlet mechanism comprises a water inlet, a connecting water pipe and a water inlet pump, the water inlet penetrates through the cover and extends into the inner cavity of the reaction cavity, one end of the connecting water pipe is sleeved on the water inlet, and the other end of the connecting water pipe is communicated with the water inlet pipe through the water inlet pump.
The aeration mechanism is arranged at the bottom of the inner cavity of the reaction cavity; preferably, the aeration mechanism comprises an aeration disc and an aeration pump, the aeration disc is provided with the bottom of the inner cavity of the reaction cavity, and the aeration pump is communicated with the aeration disc.
The water bath mechanism is arranged at the bottom of the reaction cavity and is communicated with the hollow layer; preferably, the water bath mechanism comprises a hot water pipe, a booster pump, a water bath kettle and a circulating pipe, the water bath kettle is installed at the bottom of the reaction cavity, one end of the hot water pipe is communicated with the water bath kettle, the other end of the hot water pipe is communicated with the hollow layer, the booster pump is installed on one side of the hot water pipe, one end of the circulating pipe is communicated with the hollow layer, the other end of the circulating pipe is communicated with the water bath kettle, and the water bath mechanism is used for controlling the temperature inside the reaction cavity.
The stirring mechanism is arranged in the reaction cavity; preferably, the stirring mechanism comprises a stirring blade and a motor, the motor is fixedly mounted at the top of the cover, and the stirring blade is rotatably connected to the stirring motor and extends into the reaction cavity.
The sensing mechanism is arranged at the top end of the cover and extends to the inside of the reaction cavity; preferably, the sensing mechanism comprises a sampling pipe, a first liquid level sensor and a second liquid level sensor, the sampling pipe penetrates through the cover and extends to the inside of the reaction cavity, the first liquid level sensor and the second liquid level sensor penetrate through the cover and extend to the inside of the reaction cavity, the first liquid level sensor controls the opening and closing of the water inlet pump, the second liquid level sensor controls the opening and closing of the electromagnetic valve, the first liquid level sensor is used for controlling the highest liquid level inside the reaction cavity, and the second liquid level sensor is used for controlling the lowest liquid level inside the reaction cavity.
The detection mechanism is arranged at one end of the cover and extends into the reaction cavity, the detection mechanism comprises a DO instrument body, a membrane frame, a liquid discharge pipe, a liquid discharge port, a first spring, a liquid storage chamber, a sealing plug and a fixed shell, the fixed shell is arranged at the bottom of the cover and extends into the reaction cavity, and the DO instrument body is sleeved in the fixed shell and connected with the fixed shell through a set screw; the bottom of the DO instrument body is in threaded connection with the film frame, and a breathable film is mounted at the bottom of the film frame; the DO instrument body is internally provided with the liquid storage chamber, the top and the bottom of the liquid storage chamber are both provided with the liquid discharge ports, the inner cavity of each liquid discharge port is provided with a first spring, the bottoms of the two first springs are both connected with the sealing plugs which are clamped with the liquid discharge ports to form sealing, the liquid discharge ports arranged at the bottom of the liquid storage chamber are communicated with the liquid discharge pipe, and the liquid discharge pipe is a telescopic corrugated pipe; two metal electrodes are inserted in the liquid storage chamber.
The liquid changing mechanism is arranged in an inner cavity of the DO instrument body and comprises an inner rod, an outer rod, a sealing column, a piston and a shell, the liquid outlet arranged at the top of the liquid storage chamber is communicated with the shell, the piston with elasticity and an opening in the middle is connected in the shell in a sliding mode, the sealing column is clamped at the opening in the middle of the piston and forms sealing with the piston, the top of the sealing column is fixedly connected with the inner rod, and the top of the piston is connected with the outer rod positioned outside the inner rod; the top ends of the inner rod and the outer rod extend out of the shell, and the inner rod is higher than the outer rod; the shell is sleeved in the fixed shell, and the upper end of the shell extends out of the fixed shell;
the cleaning mechanism comprises a conveying pipe, a sleeve, a fixing hole, a convex block, a sponge wiper, a connecting frame and a second spring, wherein the connecting frame is connected with the side wall of the film frame in a clamping mode, the bottom of the connecting frame is rotatably connected with the sleeve which is of a hollow structure, the sponge wiper is arranged at the bottom of the breathable film on two sides of the sleeve, the fixing hole is formed in the surface of the sleeve, the top end of the fixing hole is connected with the liquid discharge pipe in a clamping mode, the conveying pipe is connected with the conveying pipe in a sliding mode inside the sleeve, the conveying pipe is sealed with the sleeve, an opening is formed in the surface of the conveying pipe, the bottom of the opening is movably provided with the convex block connected with the second spring, and the second spring is fixed at the position, corresponding to the inner side, of the opening of the conveying pipe. The lug is of a hollow structure, the upper end and the lower end of the lug are open, and the top end of the lug is of an arc structure at the same side as the arc end of the fixing hole;
the fixed hole is far away from the water outlet end and is positioned at the port of the inner side wall of the sleeve to form an arc structure, and the fixed hole is close to the water outlet end and is positioned at the port of the inner side wall of the sleeve to form a right-angled structure;
the drainage mechanism is communicated with the inside of the reaction cavity and comprises an electromagnetic valve, a water outlet, a fixed rod, a ball, a rotating rod, a fluted disc, a water outlet, a rack and a sliding groove, wherein the hollow conveying pipe is communicated with the rotating rod with a hollow cylindrical structure, one end of the conveying pipe deviating from the sleeve pipe is communicated with the rotating rod with a hollow cylindrical structure, the water outlet with a horn-shaped structure penetrates through the hollow layer and is communicated with the reaction cavity, the fixed rod is welded inside the water outlet and is a telescopic fixed rod, the bottom end of the fixed rod is rotatably connected with the rotating rod, one end of the rotating rod deviating from the conveying pipe is welded with the fluted disc, the ball which is matched and connected with the electromagnetic valve and is used for controlling drainage is rotatably connected with the water outlet, the electromagnetic valve is used for opening and closing the ball, and the inclined water outlet is arranged on the side surface of the ball, the side wall of the ball body is welded with the rack which is of an arc structure and meshed with the fluted disc, and the inner wall of the water outlet is provided with a contraction sliding chute which is in sliding connection with the rack;
the programmable PLC controller is in signal connection with the stirring mechanism, the sensing mechanism c, the water inlet mechanism, the aeration mechanism, the water bath mechanism, the electromagnetic valve and the DO instrument;
the operation mode of the sludge fermentation coupling biological denitrification system is as follows:
s1: conveying inoculated sludge into a reaction cavity from a sampling port, wherein the concentration of the inoculated sludge is 6-6.5mg/L, adding external sludge according to the molar ratio of C/N =3-5, adding a redox mediator riboflavin according to the concentration of 10-30 mu mol/L, adopting AOA reaction batch, stirring frequency is 80-120rpm, adding an external carbon source according to the molar ratio of C/N =2-4, sludge age is 50d, hydraulic retention time is 18-25h, and the internal temperature of the reactor is 28-32 ℃;
s2: the programmable PLC controller is used for controlling the starting and stopping of the water inlet pump, the aeration pump, the motor, the booster pump and the electromagnetic valve, and is also used for setting the reaction time of each AOA batch and the concentration interval of dissolved oxygen in the reaction cavity.
Compared with the related technology, the sludge fermentation coupling biological denitrification system provided by the invention has the following beneficial effects:
the invention provides a sludge fermentation coupled biological denitrification system, wherein the sludge fermentation provides a carbon source for denitrification reaction, and an oxidation-reduction mediator (riboflavin) strengthens the sludge in-situ fermentation in the coupled system and improves the denitrification efficiency; the ventilation film of the DO instrument is scrubbed in the drainage process, so that the monitoring accuracy is improved, and the complex process of frequently taking down the DO instrument for cleaning is avoided; the filling liquid in the DO instrument is replaced under the condition that the DO instrument is not taken down, so that time and labor are saved; the cleaning mechanism and the discharge structure of the filling liquid are integrally arranged, so that the space is saved.
Drawings
FIG. 1 is a schematic structural diagram of a preferred embodiment of a sludge fermentation coupled biological denitrification system provided by the present invention;
FIG. 2 is a schematic view of the connection between the cleaning mechanism and the detecting mechanism shown in FIG. 1;
FIG. 3 is a schematic cross-sectional view of the cleaning mechanism shown in FIG. 1;
FIG. 4 is a schematic view of the drain mechanism shown in FIG. 1;
FIG. 5 is an enlarged view of portion A of FIG. 4;
FIG. 6 is a schematic cross-sectional view of the drainage structure of FIG. 4;
FIG. 7 is a schematic diagram of the internal structure of the DO meter body shown in FIG. 1;
fig. 8 is an enlarged view of the portion B shown in fig. 7.
Reference numbers in the figures: 1. programmable PLC controller, 2, reaction mechanism, 21, cover, 22, reaction cavity, 23, hollow layer, 3, drainage mechanism, 31, electromagnetic valve, 32, water outlet, 33, fixing rod, 34, sphere, 35, rotating rod, 36, fluted disc, 37, water outlet, 38, rack, 39, chute, 4, stirring mechanism, 41, stirring blade, 42, motor, 5, water inlet mechanism, 51, water inlet, 52, connecting water pipe, 53, water inlet pump, 6, detection mechanism, 61, DO instrument body, 62, membrane frame, 62a, breathable membrane, 63, liquid outlet pipe, 64, liquid outlet, 65, first spring, 66, liquid storage chamber, 67, sealing plug, 68, fixing shell, 7, cleaning mechanism, 71, conveying pipe, 72, sleeve, 73, fixing hole, 74, bump, 75, sponge wiper, 76, connecting frame, 77, second spring, 8, aeration mechanism, 81, 75, sponge wiper, 76, connecting frame, 77, second spring, Aeration disc, 82, aeration pump, 9, water bath mechanism, 91, hot-water line, 92, booster pump, 93, water bath, 94, circulating pipe, 9a, drain, 9b, trade liquid mechanism, 91b, interior pole, 92b, outer pole, 93b, sealed post, 94b, piston, 95b, shell, 9c, sensing mechanism, 91c, sampling tube, 92c, first level sensor, 93c, second level sensor.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8, wherein fig. 1 is a schematic structural diagram of a preferred embodiment of a sludge fermentation coupled biological nitrogen removal system according to the present invention; FIG. 2 is a schematic view of the connection between the cleaning mechanism and the detecting mechanism shown in FIG. 1; FIG. 3 is a schematic cross-sectional view of the cleaning mechanism shown in FIG. 1; FIG. 4 is a schematic view of the drain mechanism shown in FIG. 1; FIG. 5 is an enlarged view of portion A of FIG. 4; FIG. 6 is a schematic cross-sectional view of the drainage structure of FIG. 4; FIG. 7 is a schematic diagram of the internal structure of the DO meter body shown in FIG. 1; fig. 8 is an enlarged view of the portion B shown in fig. 7.
The sludge fermentation coupling biological denitrification system comprises:
the reaction mechanism 2 comprises a cover 21, a reaction cavity 22 and a hollow layer 23, the hollow layer 23 is arranged on the inner side of the reaction cavity 22, the top of the reaction cavity 22 is connected with the cover 21 in a clamping manner, and the cover 21 and the reaction cavity 22 are sealed through water sealing; the bottom of the reaction mechanism 2 is communicated with a drain outlet 9a, the drain outlet 9a penetrates through the reaction cavity 22 and the hollow layer 23, and the drain outlet 9a is used for discharging all liquid mixtures in the reaction cavity 22;
the water inlet mechanism 5 is characterized in that the water inlet mechanism 5 is arranged at the top of the reaction cavity 22, the water inlet mechanism 5 comprises a water inlet 51, a connecting water pipe 52 and a water inlet pump 53, the water inlet 51 penetrates through the cover 21, the connecting water pipe 52 is sleeved on the water inlet 51, and the water inlet pump 53 is arranged at one end of the connecting water pipe 52. The wastewater is pumped by a water inlet pump 53 and transported to the reaction chamber 22 through a connecting water pipe 52.
The aeration mechanism 8 is arranged at the bottom of the inner cavity of the reaction cavity 22, the aeration mechanism 8 comprises an aeration disc 81 and an aeration pump 82, the aeration disc 81 is arranged at the bottom of the inner cavity of the reaction cavity 22 and penetrates through the bottom of the reaction cavity 22, and the aeration pump 82 is communicated with the aeration disc 81; when the aerobic biological reaction is performed in the reaction chamber 22, the aeration pump is turned on, and the interior of the reaction chamber 22 is aerated by the aeration plate 81.
The water bath mechanism 9 is arranged at the bottom of the reaction cavity 22, the water bath mechanism 9 is communicated with the hollow layer 23, the water bath mechanism 9 comprises a hot water pipe 91, a booster pump 92, a water bath 93 and a circulating pipe 94, the water bath 9 is arranged at the bottom of the reaction cavity 22, one end of the hot water pipe 91 is communicated with the water bath 93, the other end of the hot water pipe 91 is communicated with the hollow layer 23, the booster pump 92 is arranged at one side of the hot water pipe 91, one end of the circulating pipe 94 is communicated with the hollow layer 23, the other end of the circulating pipe 94 is communicated with the water bath 93, the water bath mechanism 9 is used for controlling the temperature inside the reaction cavity 22, the biological reaction inside the reaction cavity 22 needs proper temperature, the water is heated by the water bath 93, pressurized by the booster pump 92, flows to the hollow layer 23 through the hot water pipe 91, and then flows back the water in the hollow layer 23 to the water bath 93 through the circulating pipe 94, so as to ensure the constant temperature inside the reaction cavity 22, the water bath mechanism 9 is kept in operation all the time during the operation of the reaction batch.
Rabbling mechanism 4, rabbling mechanism 4 is installed in the inside of reaction cavity 22, rabbling mechanism 4 includes stirring vane 41 and motor 42, motor 42 fixed mounting is in the top of lid 21, stirring vane 41 rotates and connects in motor 42 and extend to the inside of reaction cavity 22, for guaranteeing the inside muddy water misce bene of reaction cavity 22, the reaction effect is better, sets up rabbling mechanism 4, motor 42 drives stirring vane 41 and rotates, realizes muddy water misce bene in the reaction cavity 22.
The sensing mechanism 9c, the sensing mechanism 9c is installed at the top of the cover 21 and extends to the inside of the reaction chamber 22, the sensing mechanism 9c includes a sampling tube 91c, a first liquid level sensor 92c and a second liquid level sensor 93c, the sampling tube 91c penetrates through the cover 21 and extends to the inside of the reaction chamber 22, the first liquid level sensor 92c and the second liquid level sensor 93c penetrate through the cover 21 and extend to the inside of the reaction chamber 22, the first liquid level sensor 92c controls the opening and closing of the water inlet pump 53, the second liquid level sensor 93c controls the opening and closing of the electromagnetic valve 31, the first liquid level sensor 92c is used for controlling the highest liquid level inside the reaction chamber 22, and the second liquid level sensor 93c is used for controlling the lowest liquid level inside the reaction chamber 22.
The detection mechanism 6 is arranged at one end of the cover 21 and extends into the reaction cavity 22, the detection mechanism comprises a DO instrument body 61, a membrane frame 62, a liquid discharge pipe 63, a liquid discharge port 64, a first spring 65, a liquid storage chamber 66, a sealing plug 67 and a fixed shell 68, the fixed shell 68 is arranged at the bottom of the cover 21 and extends into the reaction cavity 22, and the DO instrument body 61 is sleeved in the fixed shell 68 and is connected with the fixed shell through a set screw; the bottom of the DO instrument body 61 is in threaded connection with a membrane frame 62, the bottom of the membrane frame 62 is provided with a breathable membrane 62a, a liquid storage chamber 66 is arranged inside the DO instrument body 61, the top and the bottom of the liquid storage chamber 66 are both provided with a liquid outlet 64, the inner cavity of the liquid outlet 64 is provided with first springs 65, the bottoms of the two first springs 65 are both connected with sealing plugs 67 which are clamped with the liquid outlet 64 to form sealing, the liquid outlet 64 arranged at the bottom of the liquid storage chamber 66 is communicated with a liquid outlet pipe 63, and the liquid outlet pipe 63 is a telescopic corrugated pipe; when the filling liquid in the liquid storage chamber 66 is normally replaced, the film frame 62 is unscrewed first, and the filling liquid is injected into the liquid storage chamber 66.
The working principle of the DO meter is as follows: two metal electrodes are inserted into a liquid storage chamber 66 in the DO meter body 61, and a filling liquid (serving as an electrolyte) is filled therein and is closed by a gas permeable membrane 62 a. The layer of gas permeable membrane 62a is impermeable to water and ions of soluble substances, but permeable to oxygen and certain amounts of other gases and hydrophilic substances. A potential difference is generated between the electrodes by the action of the galvanic cell or the application of an external voltage, and due to this potential difference, metal ions enter the solution at the anode, and oxygen permeating through the gas permeable membrane 62a is reduced at the cathode. The current thus generated is directly proportional to the rate of transfer of dissolved oxygen in the electrolyte through the gas permeable membrane 62a, and thus is proportional to the partial pressure of oxygen in the sample water at a given temperature.
The liquid changing mechanism 9b is installed in the inner cavity of the DO instrument body 61, the liquid changing mechanism comprises an inner rod 91b, an outer rod 92b, a sealing column 93b, a piston 94b and a shell 95b, a liquid outlet 64 installed at the top of the liquid storage chamber 66 is communicated with the shell 95b, the volume of the inner cavity of the shell 95b is larger than that of the inner cavity of the liquid storage chamber 66, the shell 95b is connected with an elastic piston 94b with a middle opening in a sliding mode, the sealing column 93b is clamped at the middle opening of the piston 94b and forms sealing with the piston 94b, the top of the sealing column 93b is fixedly connected with the inner rod 91b, and the top of the piston 94b is connected with the outer rod 92b located on the outer side of the inner rod 91 b; the top ends of the inner rod 91b and the outer rod 92b extend out of the shell, and the inner rod 91b is higher than the outer rod 92 b; the outer shell 95b is sleeved in the fixed shell 68, and the upper end of the outer shell extends out of the fixed shell;
when the DO instrument body 61 is fixed inside the fixing shell 68, the DO instrument body 61 is used for online monitoring of the dissolved oxygen concentration inside the reaction cavity 22, and the disassembly of the DO instrument body 61 is troublesome, and at this time, when the filling liquid needs to be replaced, the fastening screw for fixing the DO instrument body 61 is firstly loosened, the DO instrument body 61 is lifted upwards for a certain distance, then the DO instrument body 61 is fixed inside the fixing shell 68, the outer rod 92b is held, the inner rod 91b is pulled upwards or upwards, so that the sealing column 93b is not clamped inside the piston 94b, at this time, the internal air pressure of the outer shell 95b is equal to the outside, the inner rod 91b and the outer rod 92b can be simultaneously pulled out, and the filling liquid is injected into the inner cavity of the outer shell 95b until the filling liquid is full; after the piston 94b is cleaned, the piston is inserted into the housing 95b, the sealing column 93b is clamped into the piston 94b again, the top ends of the inner rod 91b and the outer rod 92b are held, the piston is pushed downwards by the inner cavity of the housing 95b, the sealing plug 67 can be moved downwards by the filling liquid in the housing 95b under the pressure of the piston 94b, the first spring 65 is stretched, the filling liquid in the liquid storage chamber 66 is discharged from the liquid discharge port 64, the filling liquid in the housing 95b can be replaced by the filling liquid in the liquid storage chamber 66 before, in the process, because the amount of the filling liquid in the housing 95b is larger than that in the liquid storage chamber 66, after the filling liquid in the liquid storage chamber 66 is discharged, the filling liquid in the housing 95b is continuously injected into the liquid storage chamber 66, the rinsing effect is provided for the liquid storage chamber 66, until the filling liquid in the housing 95b is completely injected, and the piston 94b stops being pressed downwards, the first spring 65 can contract to drive the sealing plug 67 to move upwards, and finally the liquid outlet 64 is blocked to realize sealing, so that the filling liquid replacing process is completed, the DO instrument body 61 is prevented from being detached during replacement of the filling liquid, and the operation is simple.
The cleaning mechanism 7, the cleaning mechanism 7 includes a conveying pipe 71, a sleeve 72, a fixing hole 73, a bump 74, a sponge wiper 75, a connecting frame 76 and a second spring 77, the connecting frame 76 is connected to the side wall of the membrane frame 62 in a clamping manner, the bottom of the connecting frame 76 is rotatably connected with the sleeve 72 which is of a hollow structure, the sponge wiper 75 located at the bottom of the breathable membrane 62a is arranged on two sides of the sleeve 72, the fixing hole 73 is formed in the surface of the sleeve 72, a liquid discharge pipe 63 is connected to the top end of the fixing hole 73 in a clamping manner, the conveying pipe 71 is connected to the inner portion of the sleeve 72 in a sliding manner, a seal is formed between the conveying pipe 71 and the sleeve 72, an opening is formed in the surface of the conveying pipe 71, the bump 74 with the bottom connected with the second spring 77 is movably arranged at the opening of the conveying pipe 71, and the second spring 77 is fixed at the corresponding inner side of the opening of the conveying pipe 71. The lug 74 is of a hollow structure, the upper end and the lower end of the lug are open, and the top end of the lug is of an arc structure at the same side position with the arc end of the fixing hole 73;
the fixing hole 73 is far away from the water outlet end and is positioned at the port of the inner side wall of the sleeve 72 and is of an arc structure, and the fixing hole 73 is close to the water outlet end and is positioned at the port of the inner side wall of the sleeve 72 and is of a right-angle structure;
the drainage mechanism 3, the drainage mechanism 3 is communicated with the inside of the reaction cavity 22, the drainage mechanism 3 includes an electromagnetic valve 31, a water outlet 32, a fixed rod 33, a sphere 34, a rotating rod 35, a fluted disc 36, a water outlet 37, a rack 38 and a sliding chute 39, one end of the hollow conveying pipe 71 deviating from the sleeve 72 is communicated with the rotating rod 35 with a hollow cylindrical structure, the water outlet 32 with a horn-shaped structure penetrates through the hollow layer 23 to be communicated with the reaction cavity 22, the water outlet 32 is flush with the bottom end of the second liquid level sensor 93c, liquid which is not removed can be effectively prevented from being in the reaction cavity 22 when the second liquid level sensor 93c fails, the fixed rod 33 is welded in the water outlet 32, the fixed rod 33 is a vertically telescopic fixed rod 33, the bottom end of the fixed rod 33 is rotatably connected with the rotating rod 35, the fluted disc 36 is welded at one end of the rotating rod 35 deviating from the conveying pipe 71, the sphere 34 which is rotatably connected with the electromagnetic valve 31 and is used for controlling drainage is rotatably connected in the water outlet 32, the electromagnetic valve 31 is used for opening and closing the ball 34, an inclined water outlet 37 is formed in the side face of the ball 34, a rack 38 which is of an arc structure and meshed with the fluted disc 36 is welded on the side wall of the ball 34, and a contraction sliding groove 39 which is in sliding connection with the rack 38 is formed in the inner wall of the water outlet 32;
after a complete AOA batch is run, after a period of time of precipitation, the electromagnetic valve 31 is opened to drive the ball 34 to rotate, supernatant inside the reaction cavity 22 is discharged from the water outlet 37, in the rotating process of the ball 34, the rack 38 drives the fluted disc 36 to rotate, the fluted disc 36 drives the rotating rod 35, the conveying pipe 71 and the sleeve 72 to rotate, so that the sponge wiper is driven to rotate 75 degrees and is contacted with the breathable film 62a in the rotating process of the sponge wiper 75 degrees to wipe the breathable film 62a, when the liquid level inside the reaction cavity 22 is lower than the second liquid level sensor 93c, the ball 34 returns, the water outlet 37 is closed, and the sponge wiper 75 wipes the breathable film 62a again. The problems of complex process and monitoring interruption caused by frequent taking down of the DO instrument body 61 due to cleaning of the breathable film 62a are effectively avoided.
When the electrolyte inside the liquid storage chamber 66 is replaced, the electrolyte is replaced when the liquid level inside the reaction cavity 22 is at a low liquid level, the DO instrument body 61 needs to be lifted first, the lifted DO instrument body 61 is not in contact with the liquid inside the reaction cavity 22, then the electromagnetic valve 31 is opened, when the DO instrument body 61 is lifted, the cleaning mechanism 7 is lifted, meanwhile, the fixing rod 33 is contracted, the conveying pipe 71 is pulled out from the sleeve 72 until the lug 74 is clamped into the fixing hole 73, the second spring 77 rebounds to clamp the lug 74 into the fixing hole 73, the filling liquid discharged inside the liquid storage chamber 66 is discharged inside the conveying pipe 71 from the lug 74, at the moment, the conveying pipe 71 in an inclined state conveys the filling liquid to the water outlet 37 to be discharged, the replacement filling liquid is effectively prevented from flowing into the reaction cavity 22, and influences are caused on the liquid inside the reaction cavity 22. After the filling liquid is replaced, the DO meter body 61 is moved down to return to the original position, and at the same time, since the edges of the projection 74 and the fixing hole 73 are both arc-shaped, the projection 74 moves right, the second spring 77 is pressed down, and finally the projection 74 is fixed in the sleeve 72.
The PLC controller 1 is connected with the stirring mechanism 4, the sensing mechanism 9c, the water inlet mechanism 5, the aeration mechanism 8, the water bath mechanism 9, the electromagnetic valve 32 and the DO instrument through signals; the programmable PLC controller 1 controls the stirring mechanism 4, the water inlet mechanism 5, the aeration mechanism 8, the water bath mechanism 9 and the electromagnetic valve 32 to be opened and closed, receives the liquid level data transmitted by the sensing mechanism 9c and receives the dissolved oxygen data transmitted by the DO instrument.
The operation mode of the sludge fermentation coupling biological denitrification system is as follows:
s1: conveying inoculated sludge into a reaction cavity 22 from a sampling port, wherein the concentration of the inoculated sludge is 6-6.5mg/L, adding external sludge according to the C/N =4, adding a redox mediator riboflavin according to the concentration of 10 mu mol/L, adopting an AOA reaction batch, the stirring frequency is 100rpm, an external carbon source is added according to the C/N =3, the sludge age is 50d, the hydraulic retention time is 22h, and the internal temperature of the reactor is 30 ℃;
s2: the programmable PLC controller 1 is used for controlling the starting and stopping of the water inlet pump 53, the aeration pump 82, the motor 42, the booster pump 92 and the electromagnetic valve 31, the programmable PLC controller 1 is also used for setting the reaction time of each AOA batch and the concentration interval of the dissolved oxygen in the reaction cavity 22, when the AOA batch finishes the current batch operation according to the sequence, the next batch operation is automatically carried out, when the dissolved oxygen concentration in the reaction cavity 22 is equal to the set maximum value, the programmable PLC controller 1 enables the aeration pump 82 to stop operating, and when the dissolved oxygen concentration in the reaction cavity 22 is equal to the set minimum value, the programmable PLC controller 1 enables the aeration pump 82 to start operating.
The following reaction procedures were set by the programmable PLC controller 1:
l1: and (3) water is fed, after the last complete reaction batch is completed, the Programmable Logic Controller (PLC) automatically turns on the water inlet pump 53, wastewater (mainly nitrogen-containing wastewater) enters the reaction cavity 22, and the programmable PLC 1 turns off the water inlet pump 53 until the water level reaches the position of the first liquid level sensor 92 c.
L2: in the first stage A, the programmable PLC controller 1 turns on the motor 4 to stir, and the denitrification reaction, the anaerobic ammonia oxidation reaction and the sludge fermentation reaction mainly occur in the reaction cavity 22.
L3: and step O, while stirring, the programmable PLC (programmable logic controller) 1 turns on the aeration pump 82, and sets a dissolved oxygen concentration interval which can be adjusted according to the effluent index until the optimal dissolved oxygen concentration interval is set, so that the nitrification reaction mainly occurs in the reaction cavity 22.
L4: in the second stage a, the programmable PLC controller 1 turns off the aeration pump 82 while stirring.
L5: in the idle stage, the Programmable Logic Controller (PLC) 1 turns off the motor, the interior of the reaction cavity 22 is in an idle state, and sludge fermentation is mainly performed in the reaction cavity 22.
L6: and (4) draining, wherein the programmable PLC (programmable logic controller) 1 opens the electromagnetic valve 31 and drains to the position of the second liquid level sensor 93c, and the electromagnetic valve 31 is closed.
In the reaction procedure, the reaction time of the first A stage is set to be 5h, the reaction time of the O stage is set to be 2.5h, the reaction time of the second A stage is set to be 2.5h, the idle time is set to be 12.5h, and finally the NO of the effluent is generated3 -The removal rate of-N was 76.63% and the removal rate of TN was 73.4%. In the case of a poor external carbon source (added as C/N = 3), the sludge fermentation provides a carbon source for denitrification reaction, and the redox mediator (riboflavin) enhances the sludge in-situ fermentation in the coupled system and improves denitrification efficiency.
The programmable PLC controller 1, the solenoid valve 31, the motor 42, the water inlet pump 53, the DO meter body 61, the aeration pump 82, the booster pump 92, the water bath 93, the first liquid level sensor 92c, and the second liquid level sensor 93c all have external commercial power supplies. The model of the programmable PLC controller 1 is 6ES7288-2DR16-0AA0, the model of the electromagnetic valve 31 is XD _ ve7AH _7ihdliv1, the model of the motor 42 is 4RK25W, the model of the water inlet pump 53 is Lab UIP, the model of the DO instrument body 61 is DO-957F, the model of the aeration pump 82 is S-20, the model of the booster pump 92 is HQB-2000, the model of the water bath kettle 93 is HH-420, and the models of the first liquid level sensor 92c and the second liquid level sensor 93c are both EE-SPX 613.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A sludge fermentation coupling biological denitrification system is characterized by comprising: the device comprises a reaction mechanism, a water inlet mechanism, an aeration mechanism, a water bath mechanism, a stirring mechanism, a sensing mechanism, a detection mechanism, a liquid changing mechanism, a cleaning mechanism, a drainage mechanism and a programmable PLC (programmable logic controller);
the reaction mechanism comprises a cover, a reaction cavity and a hollow layer, the reaction cavity is of a hollow U-shaped structure, the hollow part is the hollow layer, and the top of the reaction cavity is connected with the cover in a clamping manner; the bottom of the reaction mechanism is communicated with a sewage draining outlet which penetrates through the reaction cavity and the hollow layer;
the water inlet mechanism is arranged at the top of the reaction cavity;
the aeration mechanism is arranged at the bottom of the inner cavity of the reaction cavity;
the water bath mechanism is arranged at the bottom of the reaction cavity and is communicated with the hollow layer;
the stirring mechanism is arranged in the reaction cavity;
the sensing mechanism is arranged at the top end of the cover and extends to the inside of the reaction cavity;
the detection mechanism is arranged at one end of the cover and extends into the reaction cavity, the detection mechanism comprises a DO instrument body, a membrane frame, a liquid discharge pipe, a liquid discharge port, a first spring, a liquid storage chamber, a sealing plug and a fixed shell, the fixed shell is arranged at the bottom of the cover and extends into the reaction cavity, and the DO instrument body is sleeved in the fixed shell and connected with the fixed shell through a set screw; the bottom of the DO instrument body is in threaded connection with the film frame, and a breathable film is mounted at the bottom of the film frame; the DO instrument body is internally provided with the liquid storage chamber, the top and the bottom of the liquid storage chamber are both provided with the liquid discharge ports, the inner cavity of each liquid discharge port is provided with a first spring, the bottoms of the two first springs are both connected with the sealing plugs which are clamped with the liquid discharge ports to form sealing, the liquid discharge ports arranged at the bottom of the liquid storage chamber are communicated with the liquid discharge pipe, and the liquid discharge pipe is a telescopic corrugated pipe; two metal electrodes are inserted into the liquid storage chamber;
the liquid changing mechanism is arranged in an inner cavity of the DO instrument body and comprises an inner rod, an outer rod, a sealing column, a piston and a shell, the liquid outlet arranged at the top of the liquid storage chamber is communicated with the shell, the piston with elasticity and an opening in the middle is connected in the shell in a sliding mode, the sealing column is clamped at the opening in the middle of the piston and forms sealing with the piston, the top of the sealing column is fixedly connected with the inner rod, and the top of the piston is connected with the outer rod positioned outside the inner rod; the top ends of the inner rod and the outer rod extend out of the shell, and the inner rod is higher than the outer rod; the shell is sleeved in the fixed shell, and the upper end of the shell extends out of the fixed shell;
the cleaning mechanism comprises a conveying pipe, a sleeve, a fixing hole, a convex block, a sponge eraser, a connecting frame and a second spring, wherein the side wall of the membrane frame is connected with the connecting frame in a clamping manner, the bottom of the connecting frame is rotatably connected with the sleeve in a hollow structure, the sponge eraser positioned at the bottom of the breathable membrane is arranged on two sides of the sleeve, the fixing hole is formed in the surface of the sleeve, the top end of the fixing hole is connected with the liquid discharge pipe in a clamping manner, the conveying pipe is connected with the inside of the sleeve in a sliding manner, a seal is formed between the conveying pipe and the sleeve, an opening is formed in the surface of the conveying pipe, the opening is movably provided with the convex block, the bottom of which is connected with the second spring, and; the lug is of a hollow structure, the upper end and the lower end of the lug are open, and the top end of the lug is of an arc structure at the same side as the arc end of the fixing hole;
the fixed hole is far away from the water outlet end and is positioned at the port of the inner side wall of the sleeve to form an arc structure, and the fixed hole is close to the water outlet end and is positioned at the port of the inner side wall of the sleeve to form a right-angled structure;
the drainage mechanism is communicated with the inside of the reaction cavity.
2. The sludge fermentation coupled biological nitrogen removal system of claim 1, wherein the water inlet mechanism comprises a water inlet, a connecting water pipe and a water inlet pump, the water inlet penetrates through the cover and extends into the inner cavity of the reaction cavity, one end of the connecting water pipe is sleeved on the water inlet, and the other end of the connecting water pipe is communicated with the water inlet pipe through the water inlet pump.
3. The sludge fermentation coupled biological nitrogen removal system as claimed in claim 1 or 2, wherein said aeration mechanism comprises an aeration disc and an aeration pump, said aeration disc is provided with the bottom of the inner cavity of said reaction chamber, said aeration pump is connected to said aeration disc.
4. The sludge fermentation coupled biological nitrogen removal system as claimed in claim 1 or 2, wherein the water bath mechanism comprises a hot water pipe, a booster pump, a water bath and a circulating pipe, the water bath is mounted at the bottom of the reaction chamber, one end of the hot water pipe is communicated with the water bath, the other end of the hot water pipe is communicated with the hollow layer, the booster pump is mounted at one side of the hot water pipe, one end of the circulating pipe is communicated with the hollow layer, the other end of the circulating pipe is communicated with the water bath, and the water bath mechanism is used for controlling the temperature inside the reaction chamber.
5. The sludge fermentation coupled biological nitrogen removal system as claimed in claim 1 or 2, wherein said stirring mechanism comprises a stirring blade and a motor, said motor is fixedly mounted on the top of said cover, said stirring blade is rotatably connected to said stirring motor and extends to the inside of said reaction chamber.
6. The sludge fermentation coupled biological denitrification system as claimed in claim 1, wherein the drainage mechanism comprises an electromagnetic valve, a drainage port, a fixed rod, a ball, a rotating rod, a fluted disc, a water outlet, a rack and a chute, one end of the conveying pipe with a hollow inner part, which is far away from the sleeve, is communicated with the rotating rod with a hollow cylindrical structure, the drainage port with a horn-shaped structure penetrates through the hollow layer and is communicated with the reaction cavity, the fixed rod is welded inside the drainage port, the fixed rod is a telescopic fixed rod, the bottom end of the fixed rod is rotatably connected with the rotating rod, the fluted disc is welded at one end of the rotating rod, which is far away from the conveying pipe, the ball which is matched with the electromagnetic valve and is used for controlling drainage is rotatably connected with the drainage port, and the electromagnetic valve is used for opening and closing the ball, the side of the ball body is provided with the inclined water outlet, the side wall of the ball body is welded with the rack which is of an arc structure and meshed with the fluted disc, and the inner wall of the water outlet is provided with a contraction sliding chute which is connected with the rack in a sliding way.
7. The sludge fermentation coupled biological denitrification system as claimed in claim 6, wherein the sensing mechanism comprises a sampling tube, a first level sensor and a second level sensor, the sampling tube penetrates through the cover and extends to the inside of the reaction chamber, the first level sensor and the second level sensor penetrate through the cover and extend to the inside of the reaction chamber, the first level sensor controls the opening and closing of the water inlet pump, the second level sensor controls the opening and closing of the electromagnetic valve, the first level sensor is used for controlling the highest liquid level inside the reaction chamber, and the second level sensor is used for controlling the lowest liquid level inside the reaction chamber.
8. The sludge fermentation coupled biological nitrogen removal system as claimed in claim 6, wherein said programmable PLC controller is in signal connection with said stirring mechanism, said sensing mechanism, said water inlet mechanism, said aeration mechanism, said water bath mechanism, said electromagnetic valve and said DO meter.
9. The method for operating a sludge fermentation coupled biological nitrogen removal system according to any one of claims 1 to 8, characterized by comprising the following steps:
s1: conveying inoculated sludge into a reaction cavity from a sampling port, wherein the concentration of the inoculated sludge is 6-6.5mg/L, adding exogenous sludge according to the C/N =3-5, adding a redox mediator riboflavin according to the concentration of 10-30 mu mol/L, adopting an AOA reaction batch, stirring at the frequency of 80-120rpm, adding an external carbon source according to the C/N =2-4, keeping the sludge age at 50d, and keeping the hydraulic retention time at 18-25h, wherein the internal temperature of the reactor is 28-32 ℃;
s2: programmable logic controller is used for controlling opening of intake pump, aeration pump, motor, booster pump, solenoid valve and stops, and programmable logic controller still is used for setting up the reaction time of each batch of AOA, reaction cavity dissolved oxygen's concentration interval, specifically is:
l1: water is fed, after the last complete reaction batch is completed, the programmable PLC controller controls the water feeding pump to be started, wastewater enters the reaction cavity, and the programmable PLC controller controls the water feeding pump to be closed until the water level reaches the detection position of the first liquid level sensor;
l2: in the first stage A, a Programmable Logic Controller (PLC) controls a motor to stir, and denitrification reaction, anaerobic ammonia oxidation reaction and sludge fermentation reaction mainly occur in a reaction cavity;
l3: step O, while stirring, the programmable PLC controller controls the aeration pump to be turned on, and the aeration pump can be debugged according to the water outlet index until the optimal dissolved oxygen concentration range is reached; nitration reaction mainly occurs in the reaction cavity;
l4: in the second stage A, the programmable PLC controller controls the aeration pump to be closed while stirring;
l5: in the idle stage, the programmable PLC controller controls the motor to be closed; sludge fermentation is mainly used in the reaction cavity;
l6: and (4) draining, wherein the programmable PLC controls the electromagnetic valve to be opened, and the electromagnetic valve is closed when the water level is controlled at the detection position of the second liquid level sensor.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4786399A (en) * | 1987-09-28 | 1988-11-22 | Allied-Signal Inc. | Seal means for isolated grounded O2 sensor |
| WO2002063289A1 (en) * | 2001-02-02 | 2002-08-15 | Matsushita Electric Industrial Co., Ltd. | Gas density detector and fuel cell system using the detector |
| CN1523348A (en) * | 2003-02-21 | 2004-08-25 | 中国科学院海洋研究所 | Dissolved oxygen monitoring sensor |
| JP2012063345A (en) * | 2010-08-19 | 2012-03-29 | Denso Corp | Gas sensor control device |
| CN103382051A (en) * | 2013-07-06 | 2013-11-06 | 北京工业大学 | Apparatus and method used for enhancing low-temperature bio-nitrification effects |
| CN104280525A (en) * | 2014-10-21 | 2015-01-14 | 中山欧麦克仪器设备有限公司 | Dissolved oxygen sensor with automatic cleaning function |
| CN109912030A (en) * | 2019-04-02 | 2019-06-21 | 北京工业大学 | The method and apparatus of heterotrophism and autotrophy coupling depth denitrogenation synchronous sludge decrement are realized in AOA-SBR |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614419A (en) * | 2013-04-28 | 2015-05-13 | 天和自动化科技（苏州）股份有限公司 | High precision dissolved oxygen detector |
-
2019
- 2019-09-30 CN CN201910942977.8A patent/CN110606566B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4786399A (en) * | 1987-09-28 | 1988-11-22 | Allied-Signal Inc. | Seal means for isolated grounded O2 sensor |
| WO2002063289A1 (en) * | 2001-02-02 | 2002-08-15 | Matsushita Electric Industrial Co., Ltd. | Gas density detector and fuel cell system using the detector |
| CN1523348A (en) * | 2003-02-21 | 2004-08-25 | 中国科学院海洋研究所 | Dissolved oxygen monitoring sensor |
| JP2012063345A (en) * | 2010-08-19 | 2012-03-29 | Denso Corp | Gas sensor control device |
| CN103382051A (en) * | 2013-07-06 | 2013-11-06 | 北京工业大学 | Apparatus and method used for enhancing low-temperature bio-nitrification effects |
| CN104280525A (en) * | 2014-10-21 | 2015-01-14 | 中山欧麦克仪器设备有限公司 | Dissolved oxygen sensor with automatic cleaning function |
| CN109912030A (en) * | 2019-04-02 | 2019-06-21 | 北京工业大学 | The method and apparatus of heterotrophism and autotrophy coupling depth denitrogenation synchronous sludge decrement are realized in AOA-SBR |
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