CN113582323A - Automatic Fenton reaction device and control method - Google Patents
Automatic Fenton reaction device and control method Download PDFInfo
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- CN113582323A CN113582323A CN202110739231.4A CN202110739231A CN113582323A CN 113582323 A CN113582323 A CN 113582323A CN 202110739231 A CN202110739231 A CN 202110739231A CN 113582323 A CN113582323 A CN 113582323A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 34
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 109
- 238000003860 storage Methods 0.000 claims abstract description 108
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 94
- 239000007788 liquid Substances 0.000 claims abstract description 84
- 239000002351 wastewater Substances 0.000 claims abstract description 75
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 63
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 63
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 63
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 63
- 239000003814 drug Substances 0.000 claims abstract description 41
- 239000003513 alkali Substances 0.000 claims abstract description 27
- 239000001117 sulphuric acid Substances 0.000 claims abstract description 16
- 235000011149 sulphuric acid Nutrition 0.000 claims abstract description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 75
- 238000003756 stirring Methods 0.000 claims description 38
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 25
- 238000005086 pumping Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000498 cooling water Substances 0.000 claims description 12
- 230000001186 cumulative effect Effects 0.000 claims description 9
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 229920002401 polyacrylamide Polymers 0.000 description 47
- 230000003647 oxidation Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 239000002699 waste material Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000012476 oxidizable substance Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009284 supercritical water oxidation Methods 0.000 description 1
- 231100001234 toxic pollutant Toxicity 0.000 description 1
- 238000009279 wet oxidation reaction Methods 0.000 description 1
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
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Abstract
The invention relates to the technical field of wastewater treatment, in particular to an automatic Fenton reaction device and a control method. Including the fenton retort, the waste water jar, the sulphuric acid storage tank, the ferrous sulfate storage tank, the hydrogen peroxide solution storage tank, liquid alkali storage tank and PAM storage tank, and the waste water pump, the sulphuric acid is thrown the pump, the ferrous sulfate is thrown the pump, the hydrogen peroxide solution is thrown the pump, liquid alkali is thrown pump and PAM and is thrown the pump, be equipped with main control unit and agitator motor on the fenton retort, the inside of fenton retort is equipped with the agitator, the level gauge, the PH meter, thermometer and pressure transmitter, the waste water pump, the sulphuric acid is thrown the pump, the ferrous sulfate is thrown the pump, the hydrogen peroxide solution is thrown the pump, liquid alkali is thrown the pump, PAM is thrown the pump, agitator motor, the level gauge, the PH meter, thermometer and pressure transmitter all are controlled by main control unit. The invention can realize the automatic, accurate and standardized control of the adding amount and the adding sequence of each medicament in the Fenton reaction, so that the Fenton reaction process is more sufficient and stable, and the safety of the reaction process is effectively ensured.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an automatic Fenton reaction device and a control method.
Background
The difficult problem of sewage treatment technique is that the organic waste water of high concentration is difficult to degrade. The wastewater is mainly generated in the production processes of dyes, pesticides, biological medicines, chemical engineering and the like. The pollutants in the wastewater have complex composition, various types, high concentration, high toxicity and high salinity and are difficult to biodegrade, and if the pollutants are discharged into the environment without being treated, the pollutants tend to seriously pollute the ecological environment and threaten the human health. The waste water oxidation treatment method is one of waste water chemical treatment methods, is a method for oxidizing and decomposing pollutants in waste water by using a strong oxidant to purify the waste water, has become an important means for treating biologically refractory organic toxic pollutants, and has been applied to the treatment of waste water in printing and dyeing, chemical industry, pesticides, papermaking, electroplating and printed boards, pharmacy, hospitals, mines, garbage percolate and the like. An oxidation treatment method of wastewater is one of chemical treatment methods of wastewater. A method for purifying waste water by oxidizing and decomposing pollutants in the waste water with a strong oxidant. The strong oxidant can gradually degrade organic matters in the wastewater into simple inorganic matters, and can also oxidize pollutants dissolved in water into substances which are insoluble in water and easy to separate from the water. The oxidation treatment technology of wastewater mainly comprises several types of oxygen oxidation methods such as a Fenton oxidation method, an ozone catalytic oxidation method, a wet oxidation method, a supercritical water oxidation method, a photocatalytic oxidation method, an ultrasonic oxidation method and the like.
The principle of fenton oxidation is that ferrous ions combine with hydrogen peroxide to form hydroxyl radicals with high reactivity. Hydroxyl radicals are very oxidizing, about twice as much as oxygen, and are located between atomic oxygen and fluorine, so they can interact with, for example, most organics to degrade them and eventually oxidize them to water and carbon dioxide. The Fenton reaction can oxidize and remove oxidizable substances in the wastewater, effectively treat the wastewater and reduce the COD of the wastewater. However, the current fenton reaction process has certain defects: in the Fenton reaction process at the present stage, the waste liquid and the medicament are added manually, so that the intermittent reaction is adopted, the labor cost is high, the automation degree is low, time and labor are wasted, danger can be caused after the addition sequence is wrong, the medicament is added manually and inaccurately, so that more and less medicaments are added, the waste of the medicament is caused, or the reaction is incomplete due to the small addition amount of the medicament; the existing Fenton reaction equipment has no safety guarantee measures, and the situation of over-temperature and over-pressure occurs in the reaction, so that the medicament feeding pump cannot be automatically closed in time, and the reaction is dangerous.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an automatic Fenton reaction device and a control method, which can realize automatic, accurate and standardized control of the adding amount and adding sequence of each medicament in the Fenton reaction during application, so that the Fenton reaction process is more sufficient and stable, and the safety of the reaction process is effectively ensured.
The technical scheme adopted by the invention is as follows:
the utility model provides an automatic change fenton reaction device, includes fenton retort, waste water tank, sulphuric acid storage tank, ferrous sulfate storage tank, hydrogen peroxide solution storage tank, liquid alkali storage tank and PAM storage tank, the fenton retort passes through the pipe connection with waste water tank, sulphuric acid storage tank, ferrous sulfate storage tank, hydrogen peroxide solution storage tank, liquid alkali storage tank and PAM storage tank respectively, and is equipped with waste water pump, sulphuric acid dosing pump, ferrous sulfate dosing pump, hydrogen peroxide solution dosing pump, liquid alkali dosing pump and PAM dosing pump on the pipeline between fenton retort and waste water tank, sulphuric acid storage tank, ferrous sulfate storage tank, liquid alkali storage tank and the PAM storage tank respectively, be equipped with main control unit and agitator motor on the fenton retort, the inside of fenton retort is equipped with agitator, level gauge, PH meter, thermometer and pressure transmitter, the agitator is connected with agitator motor, waste water pump, sulphuric acid dosing pump, The ferrous sulfate feeding pump, the hydrogen peroxide feeding pump, the liquid caustic soda feeding pump, the PAM feeding pump, the stirring motor, the liquid level meter, the PH meter, the thermometer and the pressure transmitter are all electrically connected with the main controller.
Based on the technical content, the wastewater and corresponding agents can be contained in the Fenton reaction tank for Fenton reaction, the wastewater tank, the sulfuric acid storage tank, the ferrous sulfate storage tank, the hydrogen peroxide storage tank, the liquid alkali storage tank and the PAM storage tank are used for respectively storing wastewater, sulfuric acid, ferrous sulfate, hydrogen peroxide, liquid alkali and PAM agents, the accurate monitoring of the feeding of the wastewater and the agents can be realized through the liquid level meter and the PH meter, the temperature and pressure monitoring can be carried out on the reaction process through the thermometer and the pressure transmitter, the overhigh temperature or pressure in the reaction process can be effectively prevented, the wastewater pump, the sulfuric acid feeding pump, the ferrous sulfate feeding pump, the hydrogen peroxide feeding pump, the liquid alkali feeding pump and the PAM feeding pump can be butted through the main controller for carrying out the automatic accurate feeding control of the wastewater, the sulfuric acid, the ferrous sulfate, the hydrogen peroxide, the liquid alkali and the PAM agents, the Fenton reaction process is stable and controllable, and the waste of the agent resources caused by the excessive feeding is avoided, or insufficient reaction caused by too little adding of the medicament; meanwhile, the main controller can realize the standardized automatic control of the adding sequence of each medicament, and prevent safety accidents in the Fenton reaction process caused by the error of the adding sequence of the medicaments.
In a possible design, all be equipped with the flowmeter on the pipeline between fenton retort and ferrous sulfate storage tank, hydrogen peroxide solution storage tank and the PAM storage tank, flowmeter and main control unit electric connection. When the device is used, the adding and metering of ferrous sulfate, hydrogen peroxide and PAM medicaments can be more accurately carried out by arranging the flow meter, metering data are all fed back to the main controller, and the main controller is convenient for carrying out accurate empty boxes for medicament adding.
In one possible design, a circulating cooling water pipe is wound on the Fenton reaction tank, one end of the circulating cooling water pipe is connected with a water inlet pipe, and the other end of the circulating cooling water pipe is connected with a water outlet pipe. During its application, through crossing water at the recirculated cooling water pipe, can cool down the fenton retort, guarantee the safety and stability of fenton reaction process.
In one possible design, the bottom of the fenton reaction tank is provided with stabilizing support legs. When its application, set up stable supporting leg through the bottom at the fenton retort, can stable support the fenton retort, prevent in reaction process agitator and agitator motor's rotation, lead to the fenton retort to rock even empty.
In one possible design, check valves are arranged on pipelines between the Fenton reaction tank and the wastewater tank, the sulfuric acid storage tank, the ferrous sulfate storage tank, the hydrogen peroxide storage tank, the liquid caustic soda storage tank and the PAM storage tank. When it is used, the backflow of the medicine can be prevented by arranging the check valve.
An automatic Fenton reaction control method is characterized in that after a main controller receives a corresponding starting instruction, a wastewater pump, a sulfuric acid feeding pump, a ferrous sulfate feeding pump, a hydrogen peroxide feeding pump, a liquid caustic soda feeding pump, a PAM feeding pump, a stirring motor, a liquid level meter and a PH meter are butted to carry out Fenton reaction control, and the control process comprises the following steps:
starting a waste water pump, and pumping the waste water in the waste water tank into a Fenton reaction tank;
detecting the wastewater liquid level in the Fenton reaction tank through a liquid level meter, and closing a wastewater pump when the liquid level reaches a set liquid level threshold value;
starting a stirring motor and a sulfuric acid adding pump, pumping the sulfuric acid stored in a sulfuric acid storage tank into a Fenton reaction tank through the sulfuric acid adding pump for mixing, and driving a stirrer to stir in the Fenton reaction tank through the stirring motor;
detecting the pH value of the mixed liquid in the Fenton reaction tank through a pH meter, and closing the sulfuric acid feeding pump when the pH value reaches a set first pH threshold value;
starting a ferrous sulfate feeding pump, pumping the ferrous sulfate stored in a ferrous sulfate storage tank into a Fenton reaction tank for mixing, closing the ferrous sulfate feeding pump when the cumulative flow of the pumped ferrous sulfate reaches a set first cumulative flow threshold value, and starting stirring timing;
when the stirring time reaches a set first time threshold, starting a hydrogen peroxide adding pump, pumping hydrogen peroxide stored in a hydrogen peroxide storage tank into a Fenton reaction tank for mixing, and when the accumulated flow of the pumped hydrogen peroxide reaches a set second accumulated flow threshold, closing the hydrogen peroxide adding pump and starting stirring timing;
when the stirring time reaches a set second time threshold, starting a liquid caustic soda adding pump, and pumping the liquid caustic soda stored in a liquid caustic soda storage tank into a Fenton reaction tank for mixing;
detecting the pH value of the mixed liquid in the Fenton reaction tank through a pH meter, and closing the liquid caustic soda feeding pump when the pH value reaches a set second pH threshold value;
starting a PAM feeding pump, pumping the PAM medicament stored in a PAM storage tank into a Fenton reaction tank for mixing, closing the PAM feeding pump until the accumulated flow of the pumped PAM medicament reaches a set third accumulated flow threshold value, and starting stirring timing;
and when the stirring time reaches a set third time threshold, closing the stirring motor.
Based on the technical content, the wastewater pump, the sulfuric acid feeding pump, the ferrous sulfate feeding pump, the hydrogen peroxide feeding pump, the liquid caustic soda feeding pump, the PAM feeding pump, the stirring motor, the liquid level meter and the PH meter are butted through the main controller to carry out corresponding Fenton reaction control, the feeding amount and the feeding sequence of each medicament can be accurately and standardly controlled, the Fenton reaction process is more fully stable, and the safety of the reaction process is ensured.
In one possible design, the liquid level threshold is 2m, the first PH threshold is 3, the second PH threshold is 7, and the first duration threshold, the second duration threshold, and the third duration threshold are all 10 min.
In one possible design, the cumulative flow of the ferrous sulfate, the hydrogen peroxide and the PAM agent is measured by a flow meter arranged on the corresponding pipeline, and the flow meter is electrically connected with the main controller.
In a possible design, the main controller further performs fenton reaction control on the thermometer and the pressure transmitter, and the control process further includes:
detecting the temperature of the mixed liquid in the Fenton reaction tank through a thermometer, and detecting the internal pressure of the Fenton reaction tank through a pressure transmitter;
and when the temperature reaches a set temperature threshold or the pressure reaches a set pressure threshold, closing the current and subsequent corresponding medicament addition in an interlocking manner, and interrupting the control process.
The invention has the beneficial effects that:
according to the invention, wastewater and corresponding medicaments can be contained in the Fenton reaction tank for carrying out the Fenton reaction, wastewater, sulfuric acid, ferrous sulfate, hydrogen peroxide, liquid alkali and PAM medicaments are respectively stored in the wastewater tank, the sulfuric acid storage tank, the ferrous sulfate storage tank, the hydrogen peroxide storage tank, the liquid alkali storage tank and the PAM storage tank, and the wastewater pump, the sulfuric acid feeding pump, the ferrous sulfate feeding pump, the hydrogen peroxide feeding pump, the liquid alkali feeding pump and the PAM feeding pump can be butted through the main controller for carrying out automatic accurate feeding control on the wastewater, sulfuric acid, ferrous sulfate, hydrogen peroxide, liquid alkali and PAM medicaments, so that the Fenton reaction process is stable and controllable, and the medicament resource waste caused by excessive feeding of the medicaments is avoided, or the insufficient reaction caused by too little feeding of the medicaments is avoided; meanwhile, the standardized automatic control of the adding sequence of each medicament by the main controller can effectively prevent safety accidents in the Fenton reaction process caused by the error of the adding sequence of the medicaments; the temperature and the pressure are monitored in the reaction process, and the interlocking control can be carried out when the temperature or the pressure is too high, so that the safety accidents are effectively prevented.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the following figures are introduced.
FIG. 1 is a schematic diagram of the apparatus of the present invention;
fig. 2 is a schematic structural view of the fenton reaction tank.
In the figure: 1. a Fenton reaction tank; 2. a waste water tank; 3. a sulfuric acid storage tank; 4. a ferrous sulfate storage tank; 5. a hydrogen peroxide storage tank; 6. a liquid caustic soda storage tank; 7. a PAM storage tank; 8. a waste water pump; 9. a sulfuric acid feeding pump; 10. adding a pump for ferrous sulfate; 11. a hydrogen peroxide adding pump; 12. adding a liquid caustic soda pump; 13. PAM feeding pump; 14. a stirring motor; 15. a stirrer; 16. a circulating cooling water pipe; 17. a water inlet pipe; 18. and (5) discharging a water pipe.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
Example 1:
this embodiment provides an automatic change fenton reaction unit, as shown in fig. 1-2, including fenton retort 1, waste water tank 2, sulphuric acid storage tank 3, ferrous sulfate storage tank 4, hydrogen peroxide solution storage tank 5, liquid alkali storage tank 6 and PAM storage tank 7, fenton retort 1 passes through the pipe connection with waste water tank 2, sulphuric acid storage tank 3, ferrous sulfate storage tank 4, hydrogen peroxide solution storage tank 5, liquid alkali storage tank 6 and PAM storage tank 7 respectively, and is equipped with waste water pump 8, sulphuric acid dosing pump 9, ferrous sulfate dosing pump 10, hydrogen peroxide solution dosing pump 11, liquid alkali dosing pump 12 and PAM dosing pump 13 on the pipeline between fenton retort 1 and waste water tank 2, sulphuric acid storage tank 3, ferrous sulfate storage tank 4, hydrogen peroxide solution storage tank 5, liquid alkali storage tank 6 and PAM storage tank 7 respectively, be equipped with main control unit and agitator motor 14 on the fenton retort 1, the inside of fenton retort 1 is equipped with agitator 15, 15, Level gauge, PH meter, thermometer and pressure transmitter, agitator 15 is connected with agitator motor 14, waste water pump 8, sulphuric acid are thrown and are added pump 9, ferrous sulfate and throw pump 10, hydrogen peroxide solution and throw pump 11, liquid caustic soda and throw pump 12, PAM and throw pump 13, agitator motor 14, level gauge, PH meter, thermometer and pressure transmitter and all with main control unit electric connection.
In specific implementation, wastewater and corresponding reagents can be contained in the Fenton reaction tank 1 to carry out Fenton reaction, wastewater, sulfuric acid, ferrous sulfate, hydrogen peroxide, liquid alkali and PAM reagents are respectively stored in the wastewater tank 2, the sulfuric acid storage tank 3, the ferrous sulfate storage tank 4, the hydrogen peroxide storage tank 5, the liquid alkali storage tank 6 and the PAM storage tank 7, and the wastewater pump 8, the sulfuric acid adding pump 9, the ferrous sulfate adding pump 10, the hydrogen peroxide adding pump 11, the liquid alkali adding pump 12 and the PAM adding pump 13 can be butted through a main controller to carry out automatic accurate feeding control on the wastewater, the sulfuric acid, the ferrous sulfate, the hydrogen peroxide, the liquid alkali and the PAM reagents, so that the Fenton reaction process is stable and controllable, and the waste of reagent resources caused by excessive addition of the reagents or insufficient reaction caused by insufficient addition of the reagents; meanwhile, the main controller can realize the standardized automatic control of the adding sequence of each medicament, and prevent safety accidents in the Fenton reaction process caused by the error of the adding sequence of the medicaments.
Example 2:
as the optimization to above-mentioned embodiment, all be equipped with the flowmeter on the pipeline between fenton retort 1 and ferrous sulfate storage tank 4, hydrogen peroxide solution storage tank 5 and PAM storage tank 7, flowmeter and main control unit electric connection. During specific implementation, ferrous sulfate, hydrogen peroxide and PAM medicament can be more accurately dosed and metered by arranging the flowmeter, metering data is fed back to the main controller, and the main controller is convenient for carrying out accurate empty boxes for medicament dosing.
And a circulating cooling water pipe 16 is wound on the Fenton reaction tank 1, one end of the circulating cooling water pipe 16 is connected with a water inlet pipe 17, and the other end of the circulating cooling water pipe is connected with a water outlet pipe 18. During the concrete implementation, through crossing water at recirculated cooling water pipe 16, can cool down fenton retort 1, guarantee the safety and stability of fenton reaction process.
The bottom of the Fenton reaction tank 1 is provided with a stable supporting leg. During specific implementation, set up stable supporting leg through the bottom at Fenton retort 1, can stable support Fenton retort 1, prevent in the reaction process rotation of agitator 15 and agitator motor 14, lead to Fenton retort 1 to rock even topple over.
All be equipped with the check valve on the pipeline between fenton retort 1 and waste water tank 2, sulphuric acid storage tank 3, ferrous sulfate storage tank 4, hydrogen peroxide solution storage tank 5, liquid caustic soda storage tank 6 and PAM storage tank 7. In specific implementation, the backflow of the medicament can be prevented by arranging the check valve.
Example 3:
the embodiment provides an automatic fenton reaction control method, which is implemented by receiving a corresponding start instruction by a main controller, and then performing fenton reaction control on a wastewater pump 8, a sulfuric acid adding pump 9, a ferrous sulfate adding pump 10, a hydrogen peroxide adding pump 11, a liquid caustic soda adding pump 12, a PAM adding pump 13, a stirring motor 14, a liquid level meter and a PH meter, wherein the control process comprises the following steps:
starting a wastewater pump 8, and pumping wastewater in the wastewater tank 2 into the Fenton reaction tank 1;
detecting the wastewater liquid level in the Fenton reaction tank 1 through a liquid level meter, and closing a wastewater pump 8 when the liquid level reaches a set liquid level threshold value;
starting a stirring motor 14 and a sulfuric acid adding pump 9, pumping the sulfuric acid stored in a sulfuric acid storage tank 3 into the Fenton reaction tank 1 through the sulfuric acid adding pump 9 for mixing, and driving a stirrer 15 to stir in the Fenton reaction tank 1 through the stirring motor 14;
detecting the pH value of the mixed liquid in the Fenton reaction tank 1 through a pH meter, and closing the sulfuric acid feeding pump 9 when the pH value reaches a set first pH threshold value;
starting a ferrous sulfate adding pump 10, pumping the ferrous sulfate stored in a ferrous sulfate storage tank 4 into a Fenton reaction tank 1 for mixing, closing the ferrous sulfate adding pump 10 when the cumulative flow of the pumped ferrous sulfate reaches a set first cumulative flow threshold, and starting stirring timing;
when the stirring time reaches a set first time threshold, starting a hydrogen peroxide adding pump 11, pumping hydrogen peroxide stored in a hydrogen peroxide storage tank 5 into a Fenton reaction tank 1 for mixing, closing the hydrogen peroxide adding pump 11 until the accumulated flow of the pumped hydrogen peroxide reaches a set second accumulated flow threshold, and starting stirring timing;
when the stirring time reaches a set second time threshold, starting the liquid caustic soda adding pump 12, and pumping the liquid caustic soda stored in the liquid caustic soda storage tank 6 into the Fenton reaction tank 1 for mixing;
detecting the pH value of the mixed liquid in the Fenton reaction tank 1 through a pH meter, and closing the liquid caustic soda dosing pump 12 when the pH value reaches a set second pH threshold value;
starting a PAM (polyacrylamide) feeding pump 13, pumping the PAM medicament stored in a PAM storage tank 7 into the Fenton reaction tank 1 for mixing, closing the PAM feeding pump 13 until the cumulative flow of the pumped PAM medicament reaches a set third cumulative flow threshold, and starting stirring timing;
and when the stirring time length reaches the set third time length threshold value, turning off the stirring motor 14.
The wastewater pump 8, the sulfuric acid feeding pump 9, the ferrous sulfate feeding pump 10, the hydrogen peroxide feeding pump 11, the liquid caustic soda feeding pump 12, the PAM feeding pump 13, the stirring motor 14, the liquid level meter and the PH meter are butted through the main controller to carry out corresponding Fenton reaction control, the feeding amount and the feeding sequence of each medicament can be accurately and standardly controlled, the Fenton reaction process is more fully stable, and the safety of the reaction process is ensured.
Example 4:
as an optimization of the above embodiment, the liquid level threshold is 2m, the first PH threshold is 3, the second PH threshold is 7, and the first time threshold, the second time threshold, and the third time threshold are all 10 min. The accumulative flow of the ferrous sulfate, the hydrogen peroxide and the PAM medicament is measured by a flow meter arranged on the corresponding pipeline, and the flow meter is electrically connected with the main controller.
Main control unit still carries out fenton reaction control to thermometer and pressure transmitter, and control process still includes:
detecting the temperature of the mixed liquid in the Fenton reaction tank 1 through a thermometer, and detecting the internal pressure of the Fenton reaction tank 1 through a pressure transmitter;
and when the temperature reaches a set temperature threshold or the pressure reaches a set pressure threshold, closing the current and subsequent corresponding medicament addition in an interlocking manner, and interrupting the control process.
The present invention is not limited to the above-described alternative embodiments, and various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the claims, and which the description is intended to be interpreted accordingly.
Claims (9)
1. The utility model provides an automatic change fenton reaction unit which characterized in that: comprises a Fenton reaction tank (1), a wastewater tank (2), a sulfuric acid storage tank (3), a ferrous sulfate storage tank (4), a hydrogen peroxide storage tank (5), a liquid alkali storage tank (6) and a PAM storage tank (7), wherein the Fenton reaction tank (1) is respectively connected with the wastewater tank (2), the sulfuric acid storage tank (3), the ferrous sulfate storage tank (4), the hydrogen peroxide storage tank (5), the liquid alkali storage tank (6) and the PAM storage tank (7) through pipelines, and a wastewater pump (8), a sulfuric acid feeding pump (9), a ferrous sulfate feeding pump (10), a hydrogen peroxide feeding pump (11), a liquid alkali feeding pump (12) and a PAM feeding pump (13) are respectively arranged on the pipelines between the Fenton reaction tank (1) and the wastewater tank (2), the sulfuric acid storage tank (3), the ferrous sulfate storage tank (4), the hydrogen peroxide storage tank (5), the liquid alkali storage tank (6) and the PAM storage tank (7), a main controller and a stirring motor (14) are arranged on the Fenton reaction tank (1), fenton retort (1) inside is equipped with agitator (15), level gauge, PH meter, thermometer and pressure transmitter, agitator (15) are connected with agitator motor (14), waste water pump (8), sulphuric acid are thrown and are added pump (9), ferrous sulfate and throw pump (10), hydrogen peroxide solution and throw pump (11), liquid caustic soda and throw pump (12), PAM and throw pump (13), agitator motor (14), level gauge, PH meter, thermometer and pressure transmitter and all with main control unit electric connection.
2. An automated fenton reaction apparatus according to claim 1, wherein: all be equipped with the flowmeter on the pipeline between fenton retort (1) and ferrous sulfate storage tank (4), hydrogen peroxide solution storage tank (5) and PAM storage tank (7), flowmeter and main control unit electric connection.
3. An automated fenton reaction apparatus according to claim 1, wherein: the Fenton reaction tank (1) is wound with a circulating cooling water pipe (16), one end of the circulating cooling water pipe (16) is connected with a water inlet pipe (17), and the other end of the circulating cooling water pipe is connected with a water outlet pipe (18).
4. An automated fenton reaction apparatus according to claim 1, wherein: the bottom of the Fenton reaction tank (1) is provided with a stable supporting leg.
5. An automated fenton reaction apparatus according to claim 1, wherein: all be equipped with the check valve on the pipeline between fenton retort (1) and waste water tank (2), sulphuric acid storage tank (3), ferrous sulfate storage tank (4), hydrogen peroxide solution storage tank (5), liquid caustic soda storage tank (6) and PAM storage tank (7).
6. An automatic fenton reaction control method applied to the automatic fenton reaction device according to any one of claims 1 to 5, wherein after receiving a corresponding start instruction from a main controller, the main controller controls the fenton reaction by interfacing a wastewater pump (8), a sulfuric acid feed pump (9), a ferrous sulfate feed pump (10), a hydrogen peroxide feed pump (11), a liquid caustic soda feed pump (12), a PAM feed pump (13), a stirring motor (14), a liquid level meter, and a PH meter, and the control process includes:
starting a waste water pump (8) to pump the waste water in the waste water tank (2) into the Fenton reaction tank (1);
detecting the wastewater liquid level in the Fenton reaction tank (1) through a liquid level meter, and closing a wastewater pump (8) when the liquid level reaches a set liquid level threshold value;
starting a stirring motor (14) and a sulfuric acid adding pump (9), pumping the sulfuric acid stored in a sulfuric acid storage tank (3) into a Fenton reaction tank (1) through the sulfuric acid adding pump (9) for mixing, and driving a stirrer (15) to stir in the Fenton reaction tank (1) through the stirring motor (14);
detecting the pH value of the mixed liquid in the Fenton reaction tank (1) through a pH meter, and closing a sulfuric acid feeding pump (9) when the pH value reaches a set first pH threshold value;
starting a ferrous sulfate feeding pump (10), pumping the ferrous sulfate stored in a ferrous sulfate storage tank (4) into a Fenton reaction tank (1) for mixing, closing the ferrous sulfate feeding pump (10) until the cumulative flow of the pumped ferrous sulfate reaches a set first cumulative flow threshold, and starting stirring and timing;
when the stirring time length reaches a set first time length threshold value, a hydrogen peroxide adding pump (11) is started, hydrogen peroxide stored in a hydrogen peroxide storage tank (5) is pumped into a Fenton reaction tank (1) to be mixed, and when the accumulated flow of the pumped hydrogen peroxide reaches a set second accumulated flow threshold value, the hydrogen peroxide adding pump (11) is closed, and stirring timing is started;
when the stirring time reaches a set second time threshold, starting a liquid caustic soda adding pump (12), and pumping the liquid caustic soda stored in a liquid caustic soda storage tank (6) into the Fenton reaction tank (1) for mixing;
detecting the pH value of the mixed liquid in the Fenton reaction tank (1) through a pH meter, and closing the liquid caustic soda feeding pump (12) when the pH value reaches a set second pH threshold value;
starting a PAM feeding pump (13), pumping the PAM medicament stored in a PAM storage tank (7) into a Fenton reaction tank (1) for mixing, closing the PAM feeding pump (13) until the accumulated flow of the pumped PAM medicament reaches a set third accumulated flow threshold value, and starting stirring timing;
and when the stirring time length reaches a set third time length threshold value, the stirring motor (14) is turned off.
7. The automated fenton reaction control method according to claim 6, wherein: the liquid level threshold is 2m, the first PH threshold is 3, the second PH threshold is 7, and the first time length threshold, the second time length threshold and the third time length threshold are all 10 min.
8. The automated fenton reaction control method according to claim 6, wherein: the accumulative flow of the ferrous sulfate, the hydrogen peroxide and the PAM medicament is measured by a flow meter arranged on the corresponding pipeline, and the flow meter is electrically connected with the main controller.
9. The automated fenton reaction control method according to claim 6, wherein the main controller further controls the fenton reaction of the butt thermometer and the pressure transmitter, and the control process further comprises:
detecting the temperature of the mixed liquid in the Fenton reaction tank (1) through a thermometer, and detecting the internal pressure of the Fenton reaction tank (1) through a pressure transmitter;
and when the temperature reaches a set temperature threshold or the pressure reaches a set pressure threshold, closing the current and subsequent corresponding medicament addition in an interlocking manner, and interrupting the control process.
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| CN114180686A (en) * | 2021-11-26 | 2022-03-15 | 广东溢丰环保集团股份有限公司 | Novel Fenton reactor |
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Application publication date: 20211102 |