CN114436375B - Rural domestic sewage dosage self-adjusting disinfection device and method thereof - Google Patents
Rural domestic sewage dosage self-adjusting disinfection device and method thereof Download PDFInfo
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
- C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4618—Supplying or removing reactants or electrolyte
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
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Abstract
A rural domestic sewage dosage self-adjusting disinfection device is characterized by comprising an electrolysis mechanism, a water inlet mechanism, a disinfection mechanism, a controller and an external power supply. The electrolysis mechanism further comprises a cathode reactor for containing sodium chloride solution, an anode reactor for containing sodium chloride solution, a sodium chloride storage, a first siphon tube, a cathode electrode, an anode electrode and a conductivity detector, and the first conductor and the second conductor are conducted on the premise that water flows through the cathode reactor. The utility model also discloses a method for disinfecting rural domestic sewage. The sewage water inlet in the use process of the utility model does not need to meet uniform and continuous conditions, even when the sewage water inlet is restarted after a few days, the treatment effect of the device is not affected, and the utility model has wide adaptability to external conditions.
Description
Technical Field
The utility model relates to a sewage treatment device, in particular to a device applied to rural sewage treatment, and also relates to a sewage treatment method.
Background
Rural domestic sewage seriously affects rural water environment for a long time due to the reasons of dispersion, difficulty in collecting and stabilizing treatment and the like, and becomes one of bottleneck problems of new rural construction in China. However, with the progress of the times and the development of economy, rural domestic sewage treatment and recycling are paid attention to. According to statistics, the ratio of rural sewage treatment facilities in more than 60 ten thousand administrative villages in China is rapidly increased from 3% in 2007 to 25% in 2017, and as the facilities are put into operation, the problems that part of treatment facilities cannot reach the standard stably and the like occur, wherein the standard reaching rate of the escherichia coli group is the lowest. In addition, the water resource shortage in China and the water ecology have a worsening trend, the sewage recycling is an important way for solving the current shortage of the water resource in China, the key problem is the problem of water quality safety guarantee, disinfection is used as a necessary treatment process for guaranteeing the water use safety, preventing disease transmission and inactivating pathogenic microorganisms, and the method is the final guarantee of water quality safety. However, there are few reports on rural domestic sewage disinfection, so that related researches on rural domestic sewage disinfection technology are necessary.
The rural domestic sewage in China has the characteristics of dispersion, large fluctuation of water quality and water quantity, large variety and quantity of pathogenic microorganisms and the like. The common sewage disinfection methods at present include chlorine disinfection, ozone disinfection, ultraviolet disinfection, electrochemical disinfection and the like, but not all processes are applicable to rural domestic sewage disinfection. Liquid chlorine is inconvenient to store, the danger of explosion exists, and substances such as Trihalomethanes (THMs), triheddles and the like can be generated; chlorine dioxide needs to be prepared on site, and has complex system, complicated operation and safety problems; the ozone has poor stability, can not be stored for a long time, needs to be prepared on site, and has high energy consumption and high operation management difficulty; the operation cost and the maintenance cost of the ultraviolet disinfection equipment are high, and the ultraviolet disinfection equipment has no continuous sterilization and disinfection effect. None of the above methods is suitable for disinfection of rural domestic sewage. The electrochemical disinfection method has the advantages of no chemical agent, compact treatment device, small equipment, small occupied area, simple, safe and reliable operation and management, low power consumption, capability of removing various microorganisms in the wastewater at one time, continuous sterilization capability and the like, can effectively adapt to the drainage characteristics and pollution characteristics of rural domestic sewage, and is an ideal choice for rural domestic sewage disinfection treatment.
The prior art provides a plurality of technical references for the sewage treatment in a concentrated way, and the Chinese utility model patent with patent number ZL201820382845.5 (an automatic dosing and sterilizing device for domestic sewage) (with the authorized bulletin number of CN 208265900); this patent, through the setting of water pump, in the sewage after will filtering is carried into the reaction tank through the outlet pipe, through the setting of spray tube and shower nozzle, make sewage spray into the reaction tank, can make sewage and liquid medicine mixed more abundant, reach better disinfection effect, through the setting of inlet tube and medicament jar, can carry water and medicament into the explosive storage case, drive the puddler through the motor and rotate to drive stirring vane and rotate, carry out intensive mixing to the liquid medicine.
The device can be used for purifying, disinfecting and recycling domestic sewage treatment (CN 113735379A) by referring to the Chinese patent application with application number 202111092174.1, and has the advantages of synchronous denitrification and dephosphorization by arranging a microorganism treatment tank and arranging a facultative anaerobic tank, an anaerobic tank and an aerobic tank inside, reasonable application of an A2/O process, application of the device for purifying, disinfecting and recycling domestic sewage treatment for advanced treatment, and good denitrification and dephosphorization effects. Through setting up purification and disinfection case to set up thick, thin filter screen and active carbon adsorbed layer inside, carry out further filtration to sewage, and adsorb smell and some harmful microorganism in the sewage, further purify quality of water, through adding antiseptic solution inside purification and disinfection pond, the effectual harmful germ in the sewage that kills makes quality of water obtain final purification, it is better to go out water quality of water, thereby carry out recycle, purification and disinfection pond inside is provided with agitating unit, can stir sewage, make sewage and antiseptic solution intensive mixing, improve quality of water disinfection purification's effect.
Disclosure of Invention
The first technical problem to be solved by the present utility model is to provide a rural domestic sewage dosage self-regulating disinfection device by using electrochemistry.
The second technical problem to be solved by the utility model is to provide a rural domestic sewage disinfection method by using electrochemistry aiming at the state of the art.
The technical scheme adopted by the utility model for solving the first technical problem is as follows: rural domestic sewage dosage self-regulating disinfection device is characterized by comprising
The electrolysis mechanism comprises a cathode reactor for containing sodium chloride solution, an anode reactor for containing sodium chloride solution, a sodium chloride storage, a first siphon, a cathode electrode, an anode electrode and a conductivity detector, wherein the cathode reactor is provided with an air outlet port and a liquid inlet port, the air outlet port is provided with an air outlet pipe, the air outlet pipe is provided with a first electromagnetic valve, the liquid inlet port is provided with a liquid inlet pipe, and the liquid inlet pipe is provided with a second electromagnetic valve; the sodium chloride storage is arranged in the cathode reactor, two ends of the first siphon pipe are respectively connected with the cathode reactor and the anode reactor, the cathode electrode is arranged at the position, close to the bottom, of the cathode reactor, the anode electrode is arranged at the position, close to the bottom, of the anode reactor, and the conductivity detector is arranged in the cathode reactor;
the water inlet mechanism comprises a water inlet groove, a metering groove and a water outlet groove which are sequentially connected, wherein a first conductor and a second conductor are arranged in the metering groove at intervals, the first conductor is connected with a cathode electrode, the second conductor is connected with an anode electrode, and the first conductor and the second conductor are conducted on the premise that water flows through the anode electrode;
the disinfection mechanism comprises a disinfection tank, a second siphon pipe and a vacuum breaker, wherein the water inlet end of the disinfection tank is connected with a water outlet tank, the water outlet end is provided with a liquid discharge pipe, the upper port of the second siphon pipe is connected with the anode reactor, the lower port of the second siphon pipe extends into the disinfection tank, and the vacuum breaker is arranged on the second siphon pipe;
the control output end of the controller is connected with the first electromagnetic valve and the second electromagnetic valve, and the signal output end of the conductivity detector is connected with the controller; and
an external power source is capable of supplying power to the cathode electrode and the anode electrode.
Preferably, the cathode electrode and the anode electrode are both mesh stainless steel sheets which are horizontally arranged.
Preferably, the bottom of the sodium chloride storage is net-shaped and is suspended on the solution in the cathode reactor.
Preferably, the measuring tank is a pasteurizing measuring tank, the first conductor and the second conductor are in plate shape and are all arranged at the upper position of the bottom of the contraction section of the pasteurizing measuring tank in a suspending manner, and the bottoms of the first conductor and the second conductor are flush and are lower than the tank top of the contraction section of the pasteurizing measuring tank. When the sewage flow rate of flowing through increases, the sewage level in the metering tank increases, the contact area between the first conductor and the second conductor and sewage increases, so that the resistance of the first conductor and the second conductor becomes smaller, the current increases, the electrolytic reaction of the anode electrode and the cathode electrode is quickened, the quantity of hydrogen and disinfectant generated in unit time increases, the disinfectant pressed into the disinfection tank by the second siphon pipe increases under the action of the hydrogen, and the disinfection treatment effect of the sewage is enhanced. The aim that the addition amount of the disinfectant can be increased or decreased spontaneously along with the change of the water amount is achieved.
Preferably, the bottoms of the first conductor and the second conductor are 2-5 mm away from the bottom of the pasteurization tank.
The utility model solves the second technical problem by adopting the technical proposal that: a method of disinfection, comprising the steps of:
rural domestic sewage to be treated enters a metering tank through a water inlet tank, and when the first conductor and the second conductor are in contact with the sewage, the circuits of the anode electrode and the cathode electrode are connected and respectively start electrolytic reaction;
electrolytic sodium chloride solution in anode reactor to produce chlorine gas, which is partially dissolved in water to produce water containing HClO and ClO -1 Is a disinfectant of (a); a cathode reactor electrolyzes sodium chloride solution to generate hydrogen; the generated hydrogen increases the internal pressure of the cathode reactor, and the solution in the cathode reactor enters the anode reactor through the first siphon pipe so as to further press the disinfection solution generated in the anode reactor into the second siphon pipe; the disinfectant flows into the disinfection tank through the second siphon pipe to disinfect the sewage; the sodium chloride consumed in the anode reactor and the cathode reactor is supplemented by a sodium chloride storage;
when no sewage enters the metering tank, the first conductor and the second conductor are not contacted with water, the circuit of the anode electrode and the cathode electrode is disconnected, the electrolytic reaction is stopped, and the disinfection treatment in the disinfection tank is interrupted;
if the conductivity detector in the cathode reactor cannot detect the conductivity, discharging the hydrogen in the cathode reactor and adding water into the cathode reactor;
and if the conductivity monitored by the conductivity detector in the cathode reactor is lower than the threshold value, supplementing sodium chloride solid into the sodium chloride storage.
Further, when rural domestic sewage flow to be treated increases, the sewage level in the metering tank increases, the contact area between the first conductor and the second conductor and sewage increases, the resistance of the first conductor and the second conductor becomes smaller, the current increases, the electrolytic reaction of the anode electrode and the cathode electrode is accelerated, the quantity of hydrogen and disinfectant generated in unit time increases, the disinfectant pressed into the disinfection tank by the second siphon increases under the action of the hydrogen, and the disinfection treatment effect of the sewage is enhanced. The aim that the addition amount of the disinfectant can be increased or decreased spontaneously along with the change of the water amount is achieved.
Compared with the prior art, the utility model has the advantages that: the reaction solution is sodium chloride solution, the chlorine generated by electrolysis can be partially dissolved and used as disinfectant to disinfect sewage, redundant chlorine and hydrogen can be periodically collected, and the whole reaction process can not generate toxic and harmful substances, so that the method has the advantages of safety, high efficiency and the like; the sewage inflow in the use process does not need to meet uniform and continuous conditions, even the sewage is restarted after a few days of dead water, the treatment effect of the device is not affected, the adaptability to external conditions is wide, and the method is particularly suitable for treating rural domestic sewage with large water quantity variation; the whole operation is simple, the maintenance is convenient, only occasional deflation and sodium chloride addition are needed, and no long-term personnel watching is needed; the device has simple structure and convenient installation, and can be produced in a complete set; the utility model can generate hydrogen in the using process, can be collected as new energy for use, and is energy-saving and environment-friendly.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment.
Fig. 2 is an enlarged schematic view of the internal structure of the anode reactor.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1, the rural domestic sewage dosage self-adjusting sterilizing apparatus in the present embodiment includes an electrolysis mechanism 1, a water inlet mechanism 3, a sterilizing mechanism 2, a controller 5, and an external power source 4.
The electrolysis mechanism 1 in this embodiment includes a cathode reactor 11 for containing sodium chloride solution, an anode reactor 12 for containing sodium chloride solution, a sodium chloride storage 13, a first siphon 17, a cathode electrode 15, an anode electrode 16 and a conductivity detector 14, the cathode reactor 11 has an air outlet port and a liquid inlet port, the air outlet port is provided with an air outlet pipe 51, the air outlet pipe 51 is provided with a first electromagnetic valve 53, the liquid inlet port is provided with a liquid inlet pipe 52, the liquid inlet pipe 52 is provided with a second electromagnetic valve 54, and the liquid inlet end of the liquid inlet pipe 52 is connected with the water storage tank 6. The sodium chloride storage 13 is arranged in the cathode reactor 11, two ends of the first siphon pipe 17 are respectively connected with the cathode reactor 11 and the anode reactor 12, the cathode electrode 15 is arranged at a position, close to the bottom, of the cathode reactor 11, the anode electrode 16 is arranged at a position, close to the bottom, of the anode reactor 12, and the conductivity detector 14 is arranged in the cathode reactor 11; the cathode electrode 15 and the anode electrode 16 in this embodiment are each mesh-shaped stainless steel sheets arranged horizontally. The bottom of the sodium chloride reservoir 13 is net-shaped and suspended over the solution in the cathode reactor 11.
The inverted first siphon 17 in this embodiment may employ an inverted "U" shaped conduit to provide a more unobstructed flow of solution from the cathode reactor 11 to the anode reactor 12. The two ports of the inverted first siphon 17 are flush (at the same level) and are located at the inner bottoms of the cathode reactor 11 and the anode reactor 12, respectively. The port of the inverted first siphon 17 cannot contact the bottom of the reactor, otherwise it would affect the liquid circulation. In practice, the cathode reactor 11 and the anode reactor 12 will contain sodium chloride solution, so that the level of sodium chloride solution in the reactor should be added above the port of the inverted first siphon 17 before operation in order to allow the siphoning process to proceed smoothly. The anode electrode 16 in the interior of the anode reactor 12 should be lower than the level at which the port of the first siphon 17 is located, and in this arrangement, the anode electrode is not exposed to air when the anode reactor liquid level reaches the port.
The sodium chloride reservoir 13 is mainly used for releasing sodium chloride into the solution, so that the sodium chloride consumed by the electrolysis of the sodium chloride solution in the cathode reactor 11 is replenished, the concentration of the sodium chloride solution is maintained at a higher level, and the electrolysis is enhanced. In practical application, in order to ensure that the sodium chloride storage 13 is in contact with the solution at any time and is convenient for later maintenance, the sodium chloride storage 13 can be arranged into a net-shaped basket structure and suspended on the solution of the cathode reactor 11, so that the solid sodium chloride can be dissolved in the solution at any time. The cathode electrode 15 should be arranged below the level of the port of the first siphon pipe 17, and in this way, the cathode electrode will not be exposed to the air when the liquid surface of the cathode reactor reaches the port.
The cathode reactor 11 and the anode reactor 12 are each provided as a closed hollow vessel, so that the apparatus can pump a solution into or out of the corresponding reactors by the state of the internal gas pressure of the reactors during operation. Meanwhile, the top parts of the cathode reactor 11 and the anode reactor 12 are respectively provided with a detachable top cover structure fixedly connected through bolts so as to conveniently and periodically discharge the gas in the reactor or replace sodium chloride solids in the sodium chloride storage 13, that is, the structure can form a closed space and can open the dosing agent or the air release.
In practical applications, the anode electrode 16 formed by a plurality of groups of anodes or the cathode electrode 15 formed by a plurality of groups of cathodes can be used. Taking the anode electrode 16 as an example, as shown in fig. 2, an arrangement mode of the anode electrode 16 in this embodiment is shown, that is, the anode electrode 16 includes a first electrode 161, a second anode 162 and a third anode 163, where the first electrode 161, the second anode 162 and the third anode 163 may be made of mesh stainless steel plates with a thickness of 0.5mm and arranged horizontally, and the three are arranged in parallel in a vertical direction, and the top of the third anode 163 located at the highest position is lower than the horizontal plane where the port is located. By adopting a mode of arranging a plurality of groups of electrodes, chlorine generated by electrolysis can be intercepted, and the solubility of the chlorine is increased, so that more effective disinfectant is generated. Compared with other gold-plating materials, the stainless steel material can achieve the disinfection effect and reduce the cost, and the electrode plates are in a net shape and horizontally placed, so that the gas production is uniform.
The probe of the conductivity detector 14 should be set flush with the port, and the conductivity signal collected by the conductivity detector 14 reflects the operation of the device in real time and is adjusted accordingly.
When the cathode electrode 15 and the anode electrode 16 are electrified, the cathode electrode 15 electrolyzes the sodium chloride solution to generate hydrogen, and the reaction process is as follows: 2h+2e=h 2 ≡, due to H 2 Insoluble in water, H 2 The generation of (2) causes the internal pressure of the cathode reactor 10 to increase, generating a volume of H 2 How much volume of solution from the cathode reactor 10 enters the anode reactor 12 through the inverted U-shaped pipe 8. Anode electrode 16 for electrolysis of sodium chloride solution to Cl 2 The reaction process is as follows: 2 Cl-2e=cl 2 ↑，Cl 2 +H 2 O＝HClO+HCl，Cl 2 +OH -1 ＝ClO -1 +Cl -1 ，Cl 2 Dissolving in water to obtain water containing HClO and ClO -1 Equal component effective disinfectant, assuming the generation of Cl 2 Fully dissolved in water, generates a volume of H 2 How much volume of sterilizing fluid is introduced into the sterilizing chamber 23, but in fact the volume of sterilizing fluid introduced into the sterilizing chamber 23 is H 2 Adding the volume of water-insoluble Cl 2 Is a volume of (c).
The water inlet mechanism 3 comprises a water inlet tank 31, a metering tank 32 and a water outlet tank 33 which are sequentially connected, the water inlet tank 31 can be used for depositing sediment, a first conductor 41 and a second conductor 42 are arranged in the metering tank 32 at intervals, the first conductor 41 is connected with the cathode electrode 15, the second conductor 42 is connected with the anode electrode 16, and the first conductor 41 and the second conductor 42 are conducted on the premise that water flows through. The metering tank 32 in this embodiment is a pasteurization metering tank, the first conductor 41 and the second conductor 42 are all suspended in the air and are arranged at the upper position of the bottom of the contraction section of the pasteurization metering tank, and the bottoms of the first conductor 41 and the second conductor 42 are flush and are lower than the top of the contraction section of the pasteurization metering tank. The bottoms of the first electric conductor 41 and the second electric conductor 42 are 2-5 mm away from the bottom of the pasteurization tank.
The cathode electrode 15 is in negative communication with an external power source 4, the first electrical conductor 41 is in positive communication with the external power source 4, and the second electrical conductor 42 is in positive communication with the anode electrode 16. When the second electric conductor 42 and the first electric conductor 41 contact water flow, electric conduction can be realized, and a circuit formed by the cathode electrode 15, the external power supply 4, the second electric conductor 42, the first electric conductor 41, the anode electrode 16 and the first siphon tube 17 is communicated, so that the anode electrode 16 and the cathode electrode 15 respectively generate electrolytic reaction. In practical application, the external power supply 4 can adopt a voltage-stabilizing direct current power supply, the external power supply 4 has the function of ensuring that the cathode electrode 15 always gets electrons, the voltage output is stable, the current is increased along with the decrease of the resistance, namely, the current is increased along with the increase of the flow in the pasteurization tank, the larger the current, the faster the electron generation rate, and the more disinfectant is generated in the same time. The second electrical conductor 42 and the first electrical conductor 41 may each be copper plates so that the second electrical conductor 42 and the first electrical conductor 41 satisfy the working condition that they are electrically conductive when in contact with water and are electrically non-conductive when placed in air.
The necessity of the measuring tank in this embodiment is that when the distance and the surface area between the two metal plates are unchanged, the resistance formed between the two metal plates is inversely proportional to the liquid level between the plates, the higher the liquid level is, the smaller the resistance is, the larger the current is, and if the concentration of the sodium chloride solution is unchanged, the more disinfectant is generated in unit time, namely, the flow is directly proportional to the disinfectant amount. The aim of self-adjusting the disinfection liquid amount according to different flow rates can be achieved through the pasteurization tank.
The disinfection mechanism 2 comprises a disinfection tank 23, a second siphon pipe 21 and a vacuum breaker 22, wherein the water inlet end of the disinfection tank 23 is connected with a water outlet tank 33, the water outlet end is provided with a liquid discharge pipe 24, the upper port of the second siphon pipe 21 is connected with the anode reactor 12, the lower port of the second siphon pipe 21 extends into the disinfection tank 23, and the vacuum breaker 22 is arranged on the second siphon pipe 21.
The vacuum breaker 22 may be an inlet check type vacuum breaker, and the vacuum breaker 22 is an inlet check type vacuum breaker in a hose type vacuum breaker, and is suitable for a place where a hose is specially connected downstream and siphon reflux and low back pressure reflux may be generated, and the vacuum breaker 22 has the function of preventing sewage in the sterilizing tank 23 from being sucked back into the anode reactor 12 when the liquid level in both reactors is lower than the port of the first siphon. The disinfection tank 23 is connected with the water outlet tank through a connecting pipe 34 below the bottom of the diffusion section tank of the metering tank 32. The upper nozzle of the second siphon tube 21 communicates with the anode reactor 12 and is parallel to or lower than the port. The lower pipe orifice of the second siphon tube 21 extends into the bottom of the disinfection tank 23. The drain 24 of the disinfection tank 23 is higher than the lower nozzle and lower than the communication pipe 34. The upper nozzle pipe bottom elevation of the second siphon pipe 21 is flush with the lower nozzle of the first siphon pipe 17, so that when the solution in the cathode reactor 11 cannot enter the anode reactor 12, the solution in the anode reactor 12 cannot enter the disinfection tank 23.
The control output end of the controller 5 is connected with the first electromagnetic valve 53 and the second electromagnetic valve 54, and the signal output end of the conductivity detector 14 is connected with the controller 5.
The rural domestic sewage disinfection method comprises the following steps:
rural domestic sewage to be treated enters the metering tank 32 through the water inlet tank 31, and when the first electric conductor 41 and the second electric conductor 42 are in contact with the sewage, the circuits of the anode electrode 16 and the cathode electrode 15 are completed and electrolytic reactions are started respectively.
Due to H 2 Insoluble in water, if Cl is produced 2 Fully dissolved in water, generates a volume of H 2 How much volume of sterilizing fluid is introduced into the sterilizing chamber, but in fact the volume of sterilizing fluid introduced into the chamber is H 2 Adding the volume of water-insoluble Cl 2 Is a volume of (c).
When no sewage enters the metering tank 32, the first electric conductor 41 and the second electric conductor 42 do not contact water, the electric circuit of the anode electrode 16 and the cathode electrode 15 is disconnected, the electrolytic reaction is stopped, and the disinfection treatment in the disinfection tank 23 is interrupted.
If the conductivity detector 14 in the cathode reactor 11 cannot detect the conductivity, discharging the hydrogen in the cathode reactor 11 and simultaneously adding water into the cathode reactor 11; if the conductivity monitored by the conductivity detector 14 inside the cathode reactor 11 is below a threshold value, the sodium chloride reservoir is replenished with sodium chloride solids.
When the rural domestic sewage flow to be treated is increased, the sewage level in the metering tank 32 is increased, the contact area between the first conductor 41 and the second conductor 42 and the sewage is increased, the resistance of the first conductor 41 and the second conductor 42 is reduced, the current is increased, the electrolytic reaction between the anode electrode 16 and the cathode electrode 15 is accelerated, the quantity of hydrogen and disinfectant generated in unit time is increased, the disinfectant quantity pressed into the disinfection tank 23 through the second siphon pipe 21 under the action of the hydrogen is increased, and the disinfection treatment effect of the sewage is enhanced.
The embodiment can adapt to the conditions of large change of rural domestic sewage water quantity and even dead water, the more disinfectant is added when the water inflow quantity is larger, the disinfection is stopped when the water is dead, and the device is simple and convenient to operate and maintain.
Claims (7)
1. Rural domestic sewage dosage self-regulating disinfection device is characterized by comprising
The electrolysis mechanism (1), the electrolysis mechanism (1) comprises a cathode reactor (11) for containing sodium chloride solution, an anode reactor (12) for containing sodium chloride solution, a sodium chloride storage (13), a first siphon (17), a cathode electrode (15), an anode electrode (16) and a conductivity detector (14), the cathode reactor (11) is provided with an air outlet port and a liquid inlet port, an air outlet pipe (51) is arranged on the air outlet port, a first electromagnetic valve (53) is arranged on the air outlet pipe (51), a liquid inlet pipe (52) is arranged on the liquid inlet port, and a second electromagnetic valve (54) is arranged on the liquid inlet pipe (52); the sodium chloride storage (13) is arranged in the cathode reactor (11), the two ends of the first siphon (17) are respectively connected with the cathode reactor (11) and the anode reactor (12), the cathode electrode (15) is arranged at the position, close to the bottom, of the cathode reactor (11), the anode electrode (16) is arranged at the position, close to the bottom, of the anode reactor (12), and the conductivity detector (14) is arranged in the cathode reactor (11);
a water inlet mechanism (3), wherein the water inlet mechanism (3) comprises a water inlet groove (31), a metering groove (32) and a water outlet groove (33) which are sequentially connected, a first conductor (41) and a second conductor (42) are arranged in the metering groove (32) at intervals, the first conductor (41) is connected with a cathode electrode (15), the second conductor (42) is connected with an anode electrode (16), and the first conductor (41) and the second conductor (42) are conducted on the premise that water flows through; when no sewage enters the metering tank (32), the first conductor (41) and the second conductor (42) are not contacted with water, and the circuits of the anode electrode (16) and the cathode electrode (15) are disconnected;
the disinfection mechanism (2), the disinfection mechanism (2) comprises a disinfection tank (23), a second siphon (21) and a vacuum breaker (22), the water inlet end of the disinfection tank (23) is connected with a water outlet tank (33), the water outlet end is provided with a liquid discharge pipe (24), the upper port of the second siphon (21) is connected with the anode reactor (12), the lower port extends into the disinfection tank (23), and the vacuum breaker (22) is arranged on the second siphon (21);
the control output end of the controller (5) is connected with the first electromagnetic valve (53) and the second electromagnetic valve (54), and the signal output end of the conductivity detector (14) is connected with the controller (5); and
an external power source (4) capable of supplying power to the cathode electrode (15) and the anode electrode (16);
the cathode reactor and the anode reactor are both arranged as closed hollow containers.
2. Rural domestic sewage dosage self-adjusting sterilizing device according to claim 1, wherein the cathode electrode (15) and the anode electrode (16) are net-shaped stainless steel sheets which are horizontally arranged.
3. Rural domestic sewage dosage self-regulating sterilizing unit according to claim 1, wherein the bottom of the sodium chloride reservoir (13) is net-shaped and suspended on the solution in the cathode reactor (11).
4. Rural domestic sewage dosage self-adjusting disinfection device according to claim 1, wherein the metering tank (32) is a pasteurization metering tank, the first conductor (41) and the second conductor (42) are arranged above the bottom of the contraction section of the pasteurization metering tank in a plate shape in a suspending manner, and the bottoms of the first conductor (41) and the second conductor (42) are flush and lower than the tank top of the contraction section of the pasteurization metering tank.
5. Rural domestic sewage dosage self-adjusting sterilizing unit according to claim 4, wherein the bottoms of the first electric conductor (41) and the second electric conductor (42) are 2-5 mm away from the bottom of the pasteurization tank.
6. A sterilization method using the sterilization apparatus according to any one of claims 1 to 5, characterized by comprising the steps of:
rural domestic sewage to be treated enters a metering tank (32) through a water inlet tank (31), and when a first conductor (41) and a second conductor (42) are in contact with the sewage, the circuits of an anode electrode (16) and a cathode electrode (15) are connected and respectively start electrolytic reaction;
an anode reactor (12) for generating chlorine gas by electrolysis of sodium chloride solution, the generated chlorine gas being partially dissolved in water to produce a solution containing HClO and ClO -1 Is a disinfectant of (a); a cathode reactor (11) for generating hydrogen by electrolyzing sodium chloride solution; the generated hydrogen increases the internal pressure of the cathode reactor (11), the solution in the cathode reactor (11) enters the anode reactor (12) through the first siphon (17), and then the disinfectant generated in the anode reactor (12) is pressed into the second siphon (21); the disinfectant flows into a disinfection tank (23) through a second siphon (21) to disinfect sewage; the sodium chloride consumed in the anode reactor (12) and the cathode reactor (11) is supplemented by a sodium chloride storage;
when no sewage enters the metering tank (32), the first conductor (41) and the second conductor (42) are not contacted with water, the circuit of the anode electrode (16) and the cathode electrode (15) is disconnected, the electrolytic reaction is stopped, and the disinfection treatment in the disinfection tank (23) is interrupted;
if the conductivity detector (14) in the cathode reactor (11) cannot detect the conductivity, discharging the hydrogen in the cathode reactor (11) and simultaneously adding water into the cathode reactor (11);
if the conductivity monitored by a conductivity detector (14) inside the cathode reactor (11) is below a threshold value, sodium chloride solids are replenished into a sodium chloride reservoir.
7. The disinfection method of claim 6, wherein: when the rural domestic sewage flow to be treated is increased, the sewage level in the metering tank (32) is increased, the contact area between the first conductor (41) and the second conductor (42) and sewage is increased, the resistance of the first conductor (41) and the second conductor (42) is reduced, the current is increased, the electrolytic reaction of the anode electrode (16) and the cathode electrode (15) is accelerated, the quantity of hydrogen and disinfectant generated in unit time is increased, the disinfectant pressed into the disinfection tank (23) through the second siphon (21) under the action of the hydrogen is increased, and the disinfection treatment effect of the sewage is enhanced.
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