CN115893612A - Multistage disinfection pretreatment device for marine isolation ward domestic sewage - Google Patents
Multistage disinfection pretreatment device for marine isolation ward domestic sewage Download PDFInfo
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- CN115893612A CN115893612A CN202211638361.XA CN202211638361A CN115893612A CN 115893612 A CN115893612 A CN 115893612A CN 202211638361 A CN202211638361 A CN 202211638361A CN 115893612 A CN115893612 A CN 115893612A
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Abstract
The invention relates to a multistage disinfection pretreatment device for domestic sewage of a marine isolation ward, which comprises: the bottom of the collection cabinet is connected with a domestic sewage pipeline through a vacuum pump and a vacuum container tank, and the domestic sewage pipeline is used for automatically conveying domestic sewage generated in the ship isolation ward to the collection cabinet through the vacuum pump; the upper part of the chlorination cabinet is connected with a seawater inlet pipe through an electrolytic bath and an electromagnetic valve, and the seawater inlet pipe is used for automatically introducing seawater into the electrolytic bath for electrolysis to generate hypochlorous acid and then enters the chlorination cabinet; the lower part of the chlorine adding cabinet is connected with the collecting cabinet through a ball valve and connected with the ozone cabinet through an electric valve respectively through a circulating stirring pump, and the ozone cabinet is used for fully mixing the sewage in the collecting cabinet and the chlorine adding cabinet and transferring the sewage from the chlorine adding cabinet to the ozone cabinet through the circulating stirring pump; an ozone generator is arranged on the ozone cabinet and connected with a zeolite aeration disc in the ozone cabinet for introducing ozone into sewage in the ozone cabinet; the bottom is connected with a ship sewage system main pipeline through a discharge pump and a one-way valve, and sewage is discharged to the ship sewage system main pipeline through an exhaust pump.
Description
Technical Field
The invention relates to a sewage treatment device for a ship isolation ward, in particular to a multistage disinfection pretreatment device for domestic sewage generated by the ship isolation ward.
Background
At present, the mature sewage disinfection treatment methods mainly comprise three methods, namely a chlorination disinfection method, an ultraviolet disinfection method and an ozone disinfection method. The principle of chlorine adding disinfection is that hypochlorous acid generated by chlorine in water is easy to permeate into bacteria through cell walls, various enzyme systems in the bacteria are inhibited and destroyed, and the bacteria are killed due to oxidation, so that the disinfection purpose is achieved. Its advantages are high disinfecting power, continuous disinfecting action of residual chlorine, easy secondary pollution caused by temp and pH value, and high corrosion to pipeline. The principle of ultraviolet disinfection is that the characteristic that the wavelength of ultraviolet spectrum has the sterilization capability within the range of 490 nm-140 nm is utilized, and the nucleoprotein of bacteria absorbs the energy of the ultraviolet spectrum to denature to cause metabolism disorder and lose the reproductive capacity, thereby playing the role of disinfection. The method has the advantages that the equipment is simple, and the sterilization process is non-toxic and harmless; but has the defects of no continuous sterilization capability and the requirement on the clarity of water quality when used for water treatment, otherwise, ultraviolet light cannot penetrate through a water body to achieve the sterilization effect. The principle of ozone disinfection is that the ozone and water are subjected to oxidation-reduction reaction, and the generated hydroxyl (OH) can decompose organic substances, microorganisms and germs in the water. The method has the advantages that the method has wide application range, is not influenced by parameters such as temperature, PH value and the like, has no secondary pollution, and can automatically decompose residual ozone into oxygen; but has the disadvantage of not having the ability to continue sterilization. The equipment adopting the single disinfection treatment technology in the market at present generally has a series of problems of incomplete disinfection, short retention time, poor original sewage treatment capability and the like, and is difficult to meet the requirement of thoroughly pre-disinfecting the domestic sewage carrying infectious disease viruses generated in the isolation ward during the running period of the ship.
Patent publication No. CN209259846U discloses a two water tank medical sewage disinfection system, and this patent is used for disinfection treatment boats and ships isolation ward's domestic sewage mainly exists following shortcoming:
no stirring equipment is arranged in the disinfection cabinet body, the introduced disinfection solution cannot uniformly react with the sewage in the cabinet body, and the sewage is easy to have anaerobic reaction in the cabinet body; the sewage flows in a self-flowing mode, and when the water inflow fluctuates, the retention time of the sewage in the disinfection cabinet cannot be ensured, so that the disinfection and the sterilization are not thorough.
Disclosure of Invention
The invention aims to provide a multistage disinfection pretreatment device for domestic sewage generated in a ship isolation ward, which can disinfect and sterilize the domestic sewage generated in the isolation ward in advance before the domestic sewage enters a ship sewage discharge system, so that the sewage with infectious disease germs can be prevented from directly flowing into the whole sewage system to cause the spread of infectious diseases.
In order to achieve the purpose, the technical scheme of the invention is as follows: a multi-stage disinfection pretreatment device for domestic sewage of marine isolation wards comprises:
the bottom of the collection cabinet is connected with a domestic sewage pipeline through a vacuum pump and a vacuum container tank, and the collection cabinet is used for automatically conveying domestic sewage generated by the ship isolation ward to the collection cabinet through the vacuum pump;
the upper part of the chlorination cabinet is connected with a seawater inlet pipe through an electrolytic cell by an electromagnetic valve, and the chlorination cabinet is used for automatically introducing seawater into the electrolytic cell for electrolysis to generate hypochlorous acid and then introducing the hypochlorous acid into the chlorination cabinet; the lower part of the chlorine adding cabinet is connected with the collecting cabinet through a ball valve and connected with the ozone cabinet through an electric valve respectively through a circulating stirring pump, and the ozone cabinet is used for fully mixing the sewage in the collecting cabinet and the chlorine adding cabinet and transferring the sewage from the chlorine adding cabinet to the ozone cabinet through the circulating stirring pump;
the ozone tank is provided with an ozone generator which is connected with a zeolite aeration disc in the ozone tank and is used for introducing ozone into sewage in the ozone tank; the bottom is connected with a ship sewage system main pipeline through a discharge pump and a one-way valve, and sewage is discharged to the ship sewage system main pipeline through an exhaust pump.
Further, the upper part of the ozone cabinet is connected with the electrolytic cell through the ozone reducer and the hydrogen diluter.
Furthermore, the top of the outlet of the electrolytic cell is provided with a ventilation device to dilute the hydrogen generated by electrolysis and prevent the concentration of the hydrogen from reaching the explosion limit.
Further, an ozone reduction net is arranged at the gas discharge position at the top of the ozone cabinet body and used for reducing redundant ozone.
Further, the domestic sewage generated in the ship isolation ward comprises excrement water, washing grey water and medical wastewater.
Furthermore, the concentration of hypochlorous acid generated by the electrolysis of seawater by the electrolytic cell can ensure that the effective chlorine concentration of the chlorination cabinet is not lower than 300mg/L.
Further, the ozone concentration provided by the ozone generator to the ozone cabinet is not lower than 50mg/L.
Furthermore, the on-off time of the electric valve and the discharge pump is controlled to adapt to the fluctuation of the ship sewage flow, and the retention time of the sewage in the chlorination cabinet is not less than 1.5 hours under the rated treatment capacity; the residence time in the ozone tank is not less than 0.5 hour.
The invention has the beneficial effects that:
the multistage disinfection pretreatment device for the domestic sewage in the ship isolation ward, provided by the invention, adopts a disinfection means combining chlorination disinfection and ozone disinfection, and makes up the problems that the ozone disinfection has no continuous sterilization capability, and the corrosion is caused by excessive addition of hypochlorous acid and the like. The multi-stage disinfection treatment technology adopted by the invention has the following advantages:
(1) The hypochlorous acid is prepared by electrolyzing seawater according to local conditions, and chlorine-containing tablets such as bleaching powder and the like do not need to be added periodically, so that the device can be started and stopped at any time;
(2) Through two-stage disinfection treatment, the sewage is thoroughly sterilized, and the removal rate of escherichia coli in the treated raw sewage is more than or equal to 99.99 percent;
(3) The retention time of the sewage in each disinfection cabinet can be ensured by interlocking control of the circulating stirring pump, the liquid level sensor and the electric valve, and the relevant standard requirements can be met;
(4) Through the control of the electrolytic cell, the electromagnetic valve, the ozone generator and other equipment, the secondary pollution caused by the excessive input of oxidant such as hypochlorous acid into the sewage is avoided.
Drawings
FIG. 1 is a system diagram of an apparatus of the present invention employing a multi-stage sterilization pretreatment technique;
in the figure: 1-vacuum collection tank, 2-ball valve, 3-vacuum pump, 4-gate valve, 5-ball valve, 6-flowmeter, 7-collection cabinet, 8-electromagnetic valve, 9-chlorination cabinet high position, 10-chlorination cabinet middle position, 11-chlorination cabinet low position, 12-ball valve, 13-electrolytic tank, 14-chlorination cabinet, 15-circulation stirring pump, 16-hydrogen diluter, 17-ozone reducer, 18-zeolite aeration disk, 19-electric valve, 20-ozone generator, 21-ozone cabinet, 22-ozone cabinet high position, 23-ozone cabinet middle position, 24-ozone cabinet low position, 25-discharge pump, 26-one-way valve.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in figure 1, the multistage disinfection pretreatment device for domestic sewage in marine isolation wards provided by the invention comprises three groups of cabinet bodies, namely a collection cabinet 7, a chlorination cabinet 14 and an ozone cabinet 21. Domestic sewage is connected with a collecting cabinet 7 through a vacuum container tank 1 and a vacuum pump 3, the bottom of a chlorination cabinet 14 is respectively connected with the bottom of the collecting cabinet 7 through a ball valve 12 and connected with the bottom of an ozone cabinet 21 through an electric valve 19 through a circulating stirring pump 15, the upper part of the chlorination cabinet 14 is connected with a seawater inlet pipe through an electrolytic bath 13 and an electromagnetic valve 8, a flowmeter 6 and a ball valve 5, an ozone generator 20 is arranged on the ozone cabinet 21, the ozone generator 20 is connected with a zeolite aeration disc 18 in the ozone cabinet 21, and the bottom of the ozone cabinet 21 is connected with a ship sewage system main pipeline through a discharge pump 25 and a one-way valve 26. The upper part of the ozone cabinet 21 is connected with the electrolytic cell 13 through the ozone reducer 17 via the hydrogen diluter 16.
The invention relates to a working principle of a multistage disinfection pretreatment device for domestic sewage of a marine isolation ward, which comprises the following steps:
1) Domestic sewage generated in the ship isolation ward passes through the vacuum container tank 1 and is automatically conveyed to the collection cabinet 7 by the vacuum pump 3, and the bottoms of the collection cabinet 7 and the chlorination cabinet 14.
2) The device mainly comprises that when domestic sewage continuously enters the device and the liquid level reaches the low level 11 of the chlorination cabinet, the circulating stirring pump 15 automatically starts to operate intermittently, and sewage in the collection cabinet 7 and the chlorination cabinet 14 is fully mixed through the communication of the ball valve 12; meanwhile, the electromagnetic valve 8 is automatically opened, seawater is introduced into the electrolytic bath 13, the seawater is electrolyzed to generate hypochlorous acid, the hypochlorous acid enters the chlorination cabinet 14, and the electromagnetic valve 8 is automatically closed when the set time is up;
3) When the liquid level of the sewage reaches the middle position 10 of the chlorination cabinet, the circulating stirring pump 15 starts to continuously operate, when the high position 9 of the chlorination cabinet is reached, the electric valve 19 is automatically opened, and the sewage after chlorination is transferred to the ozone cabinet 21;
4) When the liquid level reaches the middle position 23 of the ozone cabinet, the electric valve 19 is automatically closed, the ozone generator 20 automatically operates, and ozone enters sewage through the zeolite aeration disc 18 for disinfection treatment. After 30 minutes of operation, the ozone generator 20 stops operating, the exhaust pump 25 is started at the same time, sewage is discharged to a main pipeline of a ship sewage system, and the discharge pump 25 stops operating until the liquid level reaches the low level 24 of the ozone cabinet;
5) When the liquid level of the ozone tank 21 is lower than the low level 24 of the ozone tank, the electric valve 19 is opened again to convey the sewage from the chlorination tank 14 to the ozone tank 21. The process is repeated until the sewage level in the chlorination cabinet 14 is lower than the low level 11 of the chlorination cabinet, and then the process is stopped.
Claims (8)
1. A multi-stage disinfection pretreatment device for marine isolation ward domestic sewage, characterized by comprising:
the bottom of the collection cabinet is connected with a domestic sewage pipeline through a vacuum pump and a vacuum container tank, and the collection cabinet is used for automatically conveying domestic sewage generated by the ship isolation ward to the collection cabinet through the vacuum pump;
the upper part of the chlorination cabinet is connected with a seawater inlet pipe through an electrolytic cell by an electromagnetic valve, and the chlorination cabinet is used for automatically introducing seawater into the electrolytic cell for electrolysis to generate hypochlorous acid and then introducing the hypochlorous acid into the chlorination cabinet; the lower part of the chlorine adding cabinet is connected with the collecting cabinet through a ball valve and connected with the ozone cabinet through an electric valve respectively through a circulating stirring pump, and the ozone cabinet is used for fully mixing the sewage in the collecting cabinet and the chlorine adding cabinet and transferring the sewage from the chlorine adding cabinet to the ozone cabinet through the circulating stirring pump;
the ozone generator is arranged on the ozone cabinet, is connected with a zeolite aeration disc in the ozone cabinet and is used for introducing ozone into sewage in the ozone cabinet; the bottom is connected with a ship sewage system main pipeline through a discharge pump and a one-way valve, and sewage is discharged to the ship sewage system main pipeline through an exhaust pump.
2. The multi-stage disinfection pretreatment apparatus for domestic sewage of marine isolation wards according to claim 1, characterized in that: the upper part of the ozone cabinet is connected with the electrolytic cell through the ozone reducer and the hydrogen diluter.
3. The multi-stage disinfection pretreatment apparatus for domestic sewage of marine isolation wards according to claim 1, characterized in that: the top of the outlet of the electrolytic cell is provided with a ventilation device to dilute the hydrogen generated by electrolysis and prevent the concentration of the hydrogen from reaching the explosion limit.
4. The multi-stage disinfection pretreatment apparatus for domestic sewage of marine isolation wards according to claim 1, characterized in that: and an ozone reduction net is arranged at the gas discharge position at the top of the ozone cabinet body and used for reducing redundant ozone.
5. The multi-stage disinfection pretreatment apparatus for domestic sewage of marine isolation wards according to claim 1, characterized in that: the domestic sewage generated in the ship isolation ward comprises excrement water, washing grey water and medical wastewater.
6. The multi-stage disinfection pretreatment apparatus for domestic sewage of marine isolation wards according to claim 1, characterized in that: the concentration of hypochlorous acid generated by the electrolysis of seawater by the electrolytic cell can ensure that the effective chlorine concentration of the chlorination cabinet is not lower than 300mg/L.
7. The multi-stage disinfection pretreatment apparatus for domestic sewage of marine isolation wards according to claim 1, characterized in that: the ozone concentration provided by the ozone generator to the ozone cabinet is not lower than 50mg/L.
8. The multi-stage disinfection pretreatment apparatus for domestic sewage of marine isolation wards according to claim 1, characterized in that: the on-off time of the electric valve and the discharge pump is controlled to adapt to the fluctuation of the ship sewage flow, and the retention time of the sewage in the chlorination cabinet is not less than 1.5 hours under the rated treatment capacity; the residence time in the ozone tank is not less than 0.5 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211638361.XA CN115893612A (en) | 2022-12-19 | 2022-12-19 | Multistage disinfection pretreatment device for marine isolation ward domestic sewage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211638361.XA CN115893612A (en) | 2022-12-19 | 2022-12-19 | Multistage disinfection pretreatment device for marine isolation ward domestic sewage |
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| CN115893612A true CN115893612A (en) | 2023-04-04 |
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| CN202211638361.XA Pending CN115893612A (en) | 2022-12-19 | 2022-12-19 | Multistage disinfection pretreatment device for marine isolation ward domestic sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116947272A (en) * | 2023-09-21 | 2023-10-27 | 广东伟烨船舶设备有限公司 | Epidemic prevention isolation area domestic sewage collection and treatment system, monitoring method and medium |
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2022
- 2022-12-19 CN CN202211638361.XA patent/CN115893612A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116947272A (en) * | 2023-09-21 | 2023-10-27 | 广东伟烨船舶设备有限公司 | Epidemic prevention isolation area domestic sewage collection and treatment system, monitoring method and medium |
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