CN113045107A - Real-time intelligent reclaimed water treatment device - Google Patents
Real-time intelligent reclaimed water treatment device Download PDFInfo
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- CN113045107A CN113045107A CN201911374198.9A CN201911374198A CN113045107A CN 113045107 A CN113045107 A CN 113045107A CN 201911374198 A CN201911374198 A CN 201911374198A CN 113045107 A CN113045107 A CN 113045107A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a real-time intelligent reclaimed water treatment device which comprises a regulating tank, a biochemical reaction tank, a sedimentation tank, a reclaimed water tank and a system operation controller. The system detects the water quality of inlet water and outlet water in real time; according to the detected water quality index value of the inlet water, the output air quantity of a blower of the adjusting tank is automatically switched on or adjusted in advance, the return sludge quantity of the sedimentation tank and the blast quantity of the biochemical reaction tank are adjusted, and the return quantity of the biochemical reaction tank from returning to the adjusting tank is switched on or adjusted, so that the total hydraulic retention time of the system is adjusted, the sludge load of the system is increased, and the system can better cope with large impact load; by detecting the effluent quality, unqualified effluent is completely refluxed to the regulating tank for advanced treatment, so that the effluent quality is qualified; the adjusting tank is combined with an anaerobic nitrification tank and a primary aerobic tank according to the quality of inlet and outlet water, and closely participates in the biochemical treatment process of the system.
Description
Technical Field
The invention is used in the field of sewage and wastewater treatment, and particularly relates to a real-time intelligent reclaimed water treatment device.
Background
"mid-water" is relative to both the upper (feed) and lower (discharge) waters. The reclaimed water treatment technology is to treat discharged sewage and wastewater at different depths according to requirements by using various physical, chemical and biological methods so as to achieve the required water quality, and then recycle the sewage and wastewater into the circulation, thereby saving water resources and reducing environmental pollution.
In the traditional reclaimed water treatment process, the whole reclaimed water treatment process system is usually designed according to theoretical treatment capacity and a water inlet index value, and the ability of flexibly coping with the complicated water incoming situation of a working site is often lacked; in summary, three disadvantageous aspects are caused; firstly, large early investment is generally caused, so that huge equipment redundancy is caused; secondly, the operation state of the system cannot be dynamically and flexibly adjusted according to the actual water inlet and outlet conditions in the later operation and maintenance, so that the water outlet is unqualified; thirdly, the running state of each device can not be automatically adjusted according to the season, the water inlet and outlet quality, and the later-stage running cost is greatly increased.
Disclosure of Invention
The invention aims to provide a real-time intelligent reclaimed water treatment device, which detects the quality of inlet water entering a regulating tank and outlet water of a sedimentation tank in real time in the running process of a system; meanwhile, the device has the configuration of detecting the concentration of dissolved oxygen and activated sludge in the biochemical tank in real time; according to the detected water quality index value of the inlet water, the output air quantity of a blower of the adjusting tank is automatically switched on or adjusted in advance, the return sludge quantity of the sedimentation tank and the blast quantity of the biochemical reaction tank are adjusted, and the return quantity of the biochemical reaction tank from returning to the adjusting tank is switched on or adjusted, so that the total hydraulic retention time of the system is adjusted, the sludge load of the system is increased, and the system can better cope with large impact load; by detecting the effluent quality, unqualified effluent is completely refluxed to the regulating tank for advanced treatment, so that the effluent quality is qualified; through the configuration and the process, the oxygen content of the biochemical reaction tank can be kept at a reasonable level all the time, the biochemical effect is promoted, the energy consumption is reduced, and the later actual operation cost of the system is reduced; secondly, the system always keeps reasonable sludge concentration and proper hydraulic retention time, so that the system can flexibly deal with different inflow water qualities, has stronger capacity of resisting load impact and always keeps the effluent of the system qualified; thirdly, the automation level of the system is greatly improved, so that the later operation and maintenance cost is reduced; and fourthly, the regulating tank also serves as an anaerobic nitrification tank and a primary aerobic tank according to the quality of the inlet and outlet water, and closely participates in the biochemical treatment process of the system, so that the early investment of the system can be saved, the treatment capacity of the system is enhanced, and the quality of the outlet water of the system is improved.
In order to solve the problems, the technical scheme provided by the invention is as follows: a real-time intelligent reclaimed water treatment device comprises a regulating tank, a biochemical reaction tank, a sedimentation tank, a reclaimed water tank and a system operation controller.
Respectively arranging online water quality detectors at the water inlet of the regulating tank and the water outlet of the sedimentation tank, and detecting the water quality of inlet water and outlet water of the system in an operation period defined by the system; detecting the index values of the water quality including COD and TN; in daily operation, an aeration system in the rear part of the regulating tank is in a closed state, the regulating tank is used as an anaerobic nitrification tank, and nitrification liquid in the biochemical reaction tank continuously flows back to the front part of the regulating tank to perform biological nitrogen and phosphorus removal; if the COD value of the inlet water is detected to be higher than the designed value of the system, starting or increasing the aeration rate of a part of aeration systems behind the adjusting tank, and taking the adjusting tank as a first-stage aerobic tank; and opening and increasing the sludge reflux amount of the sedimentation tank which refluxes to the regulating tank and the biochemical reaction tank, and improving the sludge concentration of the two tanks; if the TN index value of the system is detected to be obviously higher than the design value, the aeration system of the adjusting tank is closed, and the return flow of the nitrifying liquid from the biochemical reaction tank to the adjusting tank is increased; and opening and increasing the sludge reflux amount of the sedimentation tank which refluxes to the regulating tank and the biochemical reaction tank, and improving the sludge concentration of the two tanks; if the water quality index value detected by the online water quality detector for the effluent arranged at the water outlet of the sedimentation tank is unqualified, the water outlet electromagnetic valve is closed, the water return electromagnetic valve is opened to enable the effluent to flow back to the water inlet of the regulating tank through the water return pipeline, the unqualified effluent enters the system treatment process again, the total hydraulic retention time of the system is increased, and the effluent is qualified; and when the water outlet online water quality detector detects qualified water outlet, the water outlet electromagnetic valve is opened to convey the water to the reclaimed water tank for recycling or discharging.
The regulating tank is divided into two parts, wherein the former part accounts for one third, and the latter part accounts for two thirds; the two parts are both provided with a stirrer, but only the bottom of the latter part is provided with a high-efficiency aeration device; the sewage overflows from the front part to the rear part through the overflow holes; the adjusting tank lift pump is arranged at the rear part; a water inlet quality detector is arranged at the water inlet of the regulating tank, and a barrier and a hair collector are arranged in front of the water inlet quality detector; a nitrifying liquid return pipeline is connected to the front part of the regulating tank from the biochemical reaction tank; a sludge return pipeline is arranged in the secondary sedimentation tank and is respectively connected with the former part and the latter part; a water return pipeline is connected to the water inlet of the regulating tank from the water outlet of the sedimentation tank, and the specific interface position is in front of the online water quality detector of the water inlet.
The bottom of the biochemical reaction tank is provided with a high-efficiency aeration device, a dissolved oxygen detector and a sludge concentration detector; a nitrifying liquid reflux pump is arranged in the biochemical reaction tank, a nitrifying liquid reflux electric valve is arranged on the nitrifying liquid reflux pipeline, and the amount of nitrifying liquid reflux in the adjusting tank is controlled; a sludge return pipeline from the biochemical reaction tank is connected to the sedimentation tank; the biochemical reaction tank is provided with a biochemical reaction tank sludge discharge port and a sludge discharge electric valve, and sludge is discharged in a proper amount at proper time so as to reduce the operation load of the system; obtaining a dissolved oxygen value and a sludge concentration value of the biochemical reaction tank in a period of 30 minutes; if the dissolved oxygen value is not within the reasonable range of 2-4, reducing or increasing the aeration rate by taking one fourth of the maximum aeration rate designed by the aeration device as an adjustment range and taking half an hour as a period; dividing the COD value of the inlet water obtained by the current system by the sludge load designed by the system to obtain a reasonable sludge concentration value; comparing the sludge concentration with the current sludge concentration, if the sludge concentration is lower than a reasonable sludge concentration value, taking one tenth of the volume of the sedimentation tank as an amplitude and taking half an hour as a period, and returning sludge from the sedimentation tank to increase the sludge concentration of the biochemical reaction tank until the sludge concentration is at the reasonable sludge concentration value; and if the current sludge concentration is obviously higher than the reasonable sludge concentration value, opening a sludge discharge electric valve to discharge sludge by taking one tenth of the tank capacity of the biochemical reaction tank and taking half an hour as a period until the sludge concentration of the biochemical reaction tank is in a reasonable range.
A sludge reflux pump is arranged in the sedimentation tank and is respectively connected to the biochemical reaction tank and the regulating tank through a sludge reflux pipeline; an effluent quality detector is arranged on the main effluent pipeline of the sedimentation tank; the main outlet pipeline is Y-shaped behind the outlet water quality detector, and a water outlet electromagnetic valve and a return electromagnetic valve are respectively arranged on two branches of the Y; the branch where the water outlet electromagnetic valve is located is connected to the middle water pool; the branch where the return electromagnetic valve is located is connected to the front part of the regulating reservoir.
Detecting the water quality index value of inlet and outlet water by taking one hour as a period during normal operation; if the water quality is detected to be inferior to the design index value, detecting the water quality of inlet and outlet water every six hours; when the effluent quality is recovered to be normal, the detection period is still recovered to be one hour; when the water quality is inferior to the design index value, according to the specific subentry index, the system starts the adjustment measure in the claim I, and automatically adjusts the system running state until the detected water quality is qualified; if both COD and TN are significantly higher than the design value, the COD value has higher priority, and the adjustment operation strategy aiming at the COD value is executed first.
The system operation controller (5) realizes the control logic by controlling the switches and the working amplitudes of the arranged electric valves and the electromagnetic valves, ensures that the effluent of the system is qualified, and keeps the concentration of the dissolved oxygen and the sludge in a reasonable interval.
Compared with the prior art, the invention has the beneficial effects that:
aiming at the defects and shortcomings of the traditional reclaimed water treatment process, the invention develops a real-time intelligent reclaimed water treatment device. The adjusting tank and the biochemical reaction tank both participate in biochemical reaction and cooperatively treat sewage and wastewater, thereby increasing the total hydraulic retention time, enhancing the treatment effect and the anti-load capacity, effectively reducing the tank capacity required by the biochemical reaction tank, and saving the occupied area and the investment. In the operation process, the operation state of the adjusting tank can be automatically adjusted according to the water quality of inlet water and outlet water detected in real time, the air quantity of an aeration system of the adjusting tank is started or stopped or adjusted, the return sludge quantity of the sedimentation tank is automatically adjusted, and the total sludge concentration of the system is increased or reduced, so that the purposes of reducing the operation cost, enhancing the load impact resistance of the system and ensuring the water quality of the outlet water of the system are achieved. The invention greatly improves the comprehensive cost-effectiveness ratio of reclaimed water treatment, is beneficial to rapidly popularize the advanced sewage and wastewater treatment device in a larger range and brings higher economic and social benefits.
The adjusting tank gets rid of the traditional water quantity balancing and single purpose of adjusting water quality, and can more closely and effectively participate in the biochemical reaction process of the system according to the water quality of inlet and outlet water and the two roles of the anaerobic nitrification tank and the primary aerobic tank, thereby increasing the total hydraulic retention time of the system and enhancing the treatment effect and the load impact resistance of the system.
And returning the sludge from the sedimentation tank to the biochemical reaction tank and the regulating tank, and dynamically adjusting the sludge return flow through an electric valve according to the quality of the effluent water obtained in real time on line.
And the running state of the aeration device of the adjusting tank is automatically adjusted and the power output of the equipment is automatically distributed according to the water quality index value of the inlet water and the outlet water detected in real time, so that the aeration device does not need to run according to the maximum designed power all the time, and the aim of reducing the running cost is fulfilled.
According to the real-time detection of the quality of the effluent, the effluent electromagnetic valve is operated, only qualified treated reclaimed water is allowed to flow into the reclaimed water pool, the qualified reclaimed water reaching the standard is ensured to be recycled by a user, and the safety and health of the user are facilitated.
Because the regulating reservoir with large reservoir capacity also participates in biochemical reaction, the design reservoir capacity of the biochemical reaction reservoir can be properly reduced at the beginning of design, thereby effectively reducing initial investment and reducing the total cost of the system.
According to the change of the water quality of the inlet water, the system automatically adjusts the operation state, and the operation state is not rainy, silk and muzzled, and the whole linkage can effectively improve the load impact resistance of the system, improve the automation level and greatly reduce the later operation and maintenance cost.
The invention has the advantages of low energy consumption, intellectualization, high automation degree, strong load impact resistance and no secondary pollution, and is suitable for various occasions such as hospitals, hotels, rail transit stations, expressway service areas, urban residential quarters and the like.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure, 1-a regulating reservoir, 2-a biochemical reaction tank, 3-a sedimentation tank, 4-a middle water tank, 5-a system operation controller, 6-a regulating reservoir water inlet, 7-a feed water quality detector, 8-a barrier, 9-a hair collector, 10-a regulating reservoir lifting pump, 11-a regulating reservoir aeration device, 12-a dissolved oxygen detector, 13-a sludge concentration detector, 14-a biochemical reaction tank aeration device, 15-a nitrifying liquid reflux pump, 16-a nitrifying liquid reflux pipeline, 17-a nitrifying liquid reflux electric valve, 18-a biochemical reaction tank sludge discharge port, 19-a sludge discharge electric valve, 20-a sludge reflux pump, 21-a sludge reflux control electric valve, 22-a reflux electromagnetic valve, 23-a reflux pipeline and 24-a water outlet electromagnetic valve, 25-a water outlet of the sedimentation tank, 26-a water quality detector of outlet water, 27-a sludge return pipeline and 28-a stirring device of an adjusting tank.
Detailed Description
The technical scheme of the invention will be clearly and completely described in the following by combining the embodiment of the invention; it is obvious that this example is only a part of the implementation example of the present invention, and not all. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any creative efforts shall fall within the protection scope of the present invention.
A real-time intelligent reclaimed water treatment device is composed of a regulating tank (1), a biochemical reaction tank (2), a sedimentation tank (3), a reclaimed water tank (4) and a system operation controller (5).
The adjusting tank (1) is divided into two parts, wherein the front part accounts for one third, the rear part accounts for two thirds, the two parts are separated by a partition plate, and an overflow hole is formed in the partition plate; the two parts are both provided with a stirrer, but only the bottom of the latter part is provided with a high-efficiency aeration device (11); the former part of water to be treated overflows to the latter part through the overflow holes; the adjusting tank lift pump (10) is arranged at the rear part; a water inlet quality detector (7) is arranged at the water inlet (6) of the regulating tank, and a barrier (8) and a hair collector (9) are arranged in front of the water inlet quality detector; a nitrifying liquid return pipeline (16) is connected to the front part of the regulating tank (1) from the biochemical reaction tank (2); a sludge return pipeline is arranged in the secondary sedimentation tank (3) and is respectively connected with the former part and the latter part; a water return pipeline is connected to the water inlet of the regulating tank from the water outlet of the sedimentation tank (3), and the specific interface position is in front of the online water quality detector (7) of the water inlet.
The bottom of the biochemical reaction tank (2) is provided with a high-efficiency aeration device (14) and a dissolved oxygen detector (12) and a sludge concentration detector (13); a nitrifying liquid reflux pump (15) is arranged in the biochemical reaction tank (2), a nitrifying liquid reflux electric valve (17) is arranged on the nitrifying liquid reflux pipeline, and the amount of nitrifying liquid reflux in the adjusting tank (1) is controlled; a sludge return pipeline is connected to the sedimentation tank (3) from the biochemical reaction tank (2); the biochemical reaction tank (2) is provided with a biochemical reaction tank sludge discharge port (18) and a sludge discharge electric valve (19) for discharging sludge in proper time so as to reduce the operation load of the system.
A system operation controller (5) which is used for acquiring a dissolved oxygen value and a sludge concentration value of the biochemical reaction tank (2) by using a dissolved oxygen detector (12) and a sludge concentration detector (13) in a period of 30 minutes; if the dissolved oxygen value is not in the reasonable range of 2-4, the aeration rate is reduced or increased by taking one fourth of the maximum aeration rate designed by the aeration device (14) as the adjustment range and taking half an hour as the period; dividing the COD value of the inlet water obtained by the current system by the sludge load designed by the system to obtain a reasonable sludge concentration value; and comparing with the current sludge concentration, if the sludge concentration is lower than a reasonable sludge concentration value, taking one tenth of the tank capacity of the sedimentation tank (4) as an amplitude and taking half an hour as a period, and returning sludge from the sedimentation tank (4) to increase the sludge concentration of the biochemical reaction tank (2) until the sludge concentration is at the reasonable sludge concentration value; and if the current sludge concentration is obviously higher than the reasonable sludge concentration value, opening the sludge discharge electric valve (19) to discharge sludge by taking one tenth of the tank capacity of the biochemical reaction tank (2) as a range and taking half an hour as a period until the sludge concentration of the biochemical reaction tank is in a reasonable range.
A sludge return pump (20) is arranged in the sedimentation tank (3) and is respectively connected to the biochemical reaction tank (2) and the adjusting tank (1) through a sludge return pipeline; an outlet water quality detector (26) is arranged on the water outlet (25) of the sedimentation tank; the main outlet pipe is Y-shaped behind the outlet water quality detector (26), and a water outlet electromagnetic valve (24) and a return electromagnetic valve (22) are respectively arranged on two branches of the Y; the branch where the water outlet electromagnetic valve (24) is located is connected to the middle water pool (4); the branch where the return electromagnetic valve (22) is located is connected to the water inlet (6) of the regulating reservoir.
The implementation steps of the real-time intelligent reclaimed water treatment device are as follows:
the sewage and wastewater enters the regulating tank (1) from the water inlet and is subjected to coarse filtration through the barrier (8) and the hair collector (9) to ensure that impurities and partial suspended matters in water can be effectively removed.
The sewage and wastewater pass through a water inlet quality detector (7), and a system operation controller (5) takes one hour as a period to obtain water inlet index values including COD and TN.
If the water inlet index value is in the design range, the sewage and the wastewater respectively pass through two-stage anaerobic treatment of the former part and the latter part of the regulating tank (1); the two parts of the stirrers run normally, and the treated sewage and wastewater is lifted into the biochemical reaction tank (2) through the lifting pump.
A dissolved oxygen detector (10) and a sludge concentration detector (13) are arranged in the biochemical reaction tank (2); a high-efficiency aeration device (14) capable of adjusting aeration quantity is arranged in the biochemical reaction tank (2) and is always in an aerobic state; a nitrifying liquid reflux pump (15) is arranged in the biochemical reaction tank (2), a nitrifying liquid reflux electric valve (17) is arranged on the nitrifying liquid reflux pipeline, and the amount of nitrifying liquid reflux in the adjusting tank (1) is controlled; a sludge return pipeline is connected to the sedimentation tank (3) from the biochemical reaction tank (2); the biochemical reaction tank (2) is provided with a biochemical reaction tank sludge discharge port (18) and a sludge discharge electric valve (19) for discharging sludge in proper time so as to reduce the operation load of the system.
The system operation controller (5) obtains the dissolved oxygen value and the sludge concentration value of the biochemical reaction tank (2) in a period of 30 minutes; if the dissolved oxygen value is not in the reasonable range of 2-4, the aeration rate is reduced or increased by taking one fourth of the maximum aeration rate designed by the aeration device (14) as the adjustment range and taking half an hour as the period; dividing the COD value of the inlet water obtained by the current system by the sludge load designed by the system to obtain a reasonable sludge concentration value; and comparing with the current sludge concentration, if the sludge concentration is lower than a reasonable sludge concentration value, taking one tenth of the tank capacity of the sedimentation tank (4) as an amplitude and taking half an hour as a period, and returning sludge from the sedimentation tank (4) to increase the sludge concentration of the biochemical reaction tank (2) until the sludge concentration is at the reasonable sludge concentration value; and if the current sludge concentration is obviously higher than the reasonable sludge concentration value, opening the sludge discharge electric valve (19) to discharge sludge by taking one tenth of the tank capacity of the biochemical reaction tank (2) as a range and taking half an hour as a period until the sludge concentration of the biochemical reaction tank is in a reasonable range.
A sludge return pump (20) is arranged in the sedimentation tank (3) and is respectively connected to the biochemical reaction tank (2) and the adjusting tank (1) through a sludge return pipeline; an outlet water quality detector (26) is arranged on the water outlet (25) of the sedimentation tank; the main outlet pipe is Y-shaped behind the outlet water quality detector (26), and a water outlet electromagnetic valve (24) and a return electromagnetic valve (22) are respectively arranged on two branches of the Y; the branch where the water outlet electromagnetic valve (24) is located is connected to the middle water pool (4); the branch where the return electromagnetic valve (22) is located is connected to the water inlet (6) of the regulating reservoir.
The system operation controller (5) obtains effluent quality data by taking the effluent quality detector (26) as a period of one hour, if the effluent quality is qualified, the system operation controller (5) firstly closes the backflow electromagnetic valve (22), then opens the effluent electromagnetic valve (24), and qualified treated reclaimed water can flow into the reclaimed water pool.
If the COD value of the inlet water is detected to be higher than the designed value of the system, starting or increasing the aeration rate of a part of aeration systems behind the adjusting tank, and taking the adjusting tank as a first-stage aerobic tank; and the sludge reflux quantity of the sedimentation tank (3) which refluxes to the regulating tank (1) and the biochemical reaction tank (2) is opened and increased, and the sludge concentration of the two tanks is improved.
If the TN index value of the system is detected to be obviously higher than the design value, the aeration device (11) of the adjusting tank (1) is closed, and the return flow of the nitrifying liquid from the biochemical reaction tank (2) to the adjusting tank (1) is increased; and the sludge reflux quantity of the sedimentation tank (3) which refluxes to the regulating tank (1) and the biochemical reaction tank (2) is opened and increased, and the sludge concentration of the two tanks is improved.
If the water quality index value detected by the water outlet on-line water quality detector arranged at the water outlet of the sedimentation tank (4) is unqualified, the water outlet electromagnetic valve (24) is closed, the water return electromagnetic valve (22) is opened to return the outlet water to the water inlet of the regulating tank (1) through the water return pipeline, and the unqualified outlet water enters the system treatment process again.
When the system operates normally, the system operation controller detects the water quality index value of inlet and outlet water by taking one hour as a period; if the water quality is detected to be inferior to the design index value, detecting the water quality of inlet and outlet water every six hours; when the effluent quality is recovered to be normal, the detection period is still recovered to be one hour; when the water quality is inferior to the design index value, according to the specific subentry index, the system starts the adjustment measure in the claim I, and automatically adjusts the system running state until the detected water quality is qualified; if both COD and TN are significantly higher than the design value, the COD value has higher priority, and the adjustment operation strategy aiming at the COD value is executed first.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. It is, therefore, to be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description. It is therefore intended that all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity reasons only, and those skilled in the art should consider the description as a whole, and the technical solutions in the respective embodiment examples may be appropriately changed and recombined to form other embodiments understood by those skilled in the art.
Claims (6)
1. A real-time intelligent reclaimed water treatment device is characterized by comprising a regulating tank (1), a biochemical reaction tank (2), a sedimentation tank (3), a reclaimed water tank (4) and a system operation controller (5); the water quality of inlet water and outlet water of the system is detected in an operation period defined by the system by arranging online water quality detectors at a water inlet of the regulating tank (1) and a water outlet of the sedimentation tank (3); detecting the index values of the water quality including COD and TN; in daily operation, an aeration device (11) in the rear part of the adjusting tank (1) is in a closed state, the adjusting tank is used as an anaerobic nitrification tank, and nitrification liquid in the biochemical reaction tank (2) continuously flows back to the front part of the adjusting tank (1) to carry out biological nitrogen and phosphorus removal; if the COD value of the inlet water is detected to be higher than the designed value of the system, starting or increasing the aeration rate of a part of aeration systems behind the adjusting tank, and taking the adjusting tank as a first-stage aerobic tank; and the sludge reflux amount of the sedimentation tank (3) which refluxes to the regulating tank (1) and the biochemical reaction tank (2) is opened or increased, so that the sludge concentration of the two tanks is improved; if the TN index value of the system is detected to be obviously higher than the design value, the aeration device (11) of the adjusting tank (1) is closed, and the return flow of the nitrifying liquid from the biochemical reaction tank (2) to the adjusting tank (1) is increased; and the sludge reflux amount of the sedimentation tank (3) which refluxes to the regulating tank (1) and the biochemical reaction tank (2) is opened or increased, so that the sludge concentration of the two tanks is improved; if the water quality index value detected by the effluent water quality detector arranged at the water outlet of the sedimentation tank (4) is unqualified, the effluent electromagnetic valve (24) is closed, the water backflow electromagnetic valve (22) is opened to enable effluent to flow back through the water backflow pipeline to the water inlet of the regulating tank (1), and unqualified effluent enters the system treatment process again, so that the total hydraulic retention time of the system is increased, and the effluent is qualified; when the effluent quality detector (25) detects qualified effluent, the water backflow electromagnetic valve (22) is closed, and the effluent electromagnetic valve (24) is opened to convey the qualified effluent to the reclaimed water pool (4) for recycling or discharging.
2. The real-time intelligent reclaimed water treatment device according to claim 1, wherein the adjusting tank (1) is divided into two parts, the former part accounts for one third, the latter part accounts for two thirds, the two parts are separated by a partition plate, and an overflow hole is formed in the partition plate; the two parts are both provided with a stirrer, but only the bottom of the latter part is provided with a high-efficiency aeration device (11); the former part of water to be treated overflows to the latter part through the overflow holes; the adjusting tank lift pump (10) is arranged at the rear part; a water inlet quality detector (7) is arranged at the water inlet (6) of the regulating tank, and a barrier (8) and a hair collector (9) are arranged in front of the water inlet quality detector; a nitrifying liquid return pipeline (16) is connected to the front part of the regulating tank (1) from the biochemical reaction tank (2); a sludge return pipeline is arranged in the secondary sedimentation tank (3) and is respectively connected with the former part and the latter part; a water return pipeline is connected to the water inlet of the regulating tank from the water outlet of the sedimentation tank (3), and the specific interface position is in front of the online water quality detector (7) of the water inlet.
3. The real-time intelligent reclaimed water treatment device according to claim 1, characterized in that a high-efficiency aeration device (14) is arranged at the bottom of the biochemical reaction tank (2), and a dissolved oxygen detector (12) and a sludge concentration detector (13) are arranged; a nitrifying liquid reflux pump (15) is arranged in the biochemical reaction tank (2), a nitrifying liquid reflux electric valve (17) is arranged on the nitrifying liquid reflux pipeline, and the amount of nitrifying liquid reflux in the adjusting tank (1) is controlled; a sludge return pipeline is connected to the sedimentation tank (3) from the biochemical reaction tank (2); the biochemical reaction tank (2) is provided with a biochemical reaction tank sludge discharge port (18) and a sludge discharge electric valve (19) for discharging sludge in proper time so as to reduce the operation load of the system; acquiring the dissolved oxygen value and the sludge concentration value of the biochemical reaction tank (2) in a period of 30 minutes; if the dissolved oxygen value is not in the reasonable range of 2-4, the aeration rate is reduced or increased by taking one fourth of the maximum aeration rate designed by the aeration device (14) as the adjustment range and taking half an hour as the period; dividing the COD value of the inlet water obtained by the current system by the sludge load designed by the system to obtain a reasonable sludge concentration value; and comparing with the current sludge concentration, if the sludge concentration is lower than a reasonable sludge concentration value, taking one tenth of the tank capacity of the sedimentation tank (4) as an amplitude and taking half an hour as a period, and returning sludge from the sedimentation tank (4) to increase the sludge concentration of the biochemical reaction tank (2) until the sludge concentration is at the reasonable sludge concentration value; and if the current sludge concentration is obviously higher than the reasonable sludge concentration value, opening the sludge discharge electric valve (19) to discharge sludge by taking one tenth of the tank capacity of the biochemical reaction tank (2) as a range and taking half an hour as a period until the sludge concentration of the biochemical reaction tank is in a reasonable range.
4. The real-time intelligent reclaimed water treatment device according to claim 1, wherein a sludge return pump (20) is arranged in the sedimentation tank (3) and is respectively connected to the biochemical reaction tank (2) and the adjusting tank (1) through sludge return pipelines; an outlet water quality detector (26) is arranged on the water outlet (25) of the sedimentation tank; the main outlet pipe is Y-shaped behind the outlet water quality detector (26), and a water outlet electromagnetic valve (24) and a return electromagnetic valve (22) are respectively arranged on two branches of the Y; the branch where the water outlet electromagnetic valve (24) is located is connected to the middle water pool (4); the branch where the return electromagnetic valve (22) is located is connected to the water inlet (6) of the regulating reservoir.
5. The real-time intelligent reclaimed water treatment device according to claim 1, wherein in normal operation, the system operation controller (5) detects the water quality index value of inlet and outlet water in one hour period; if the water quality is detected to be inferior to the design index value, detecting the water quality of inlet and outlet water every six hours; when the effluent quality is recovered to be normal, the detection period is still recovered to be one hour; when the water quality is inferior to the design index value, according to the specific subentry index, the system operation controller (5) starts to execute the adjustment measure in the first claim, and automatically adjusts the system operation state until the detected water quality is qualified; if both COD and TN are significantly higher than the design value, the COD value has higher priority, and the adjustment operation strategy aiming at the COD value is executed first.
6. The real-time intelligent reclaimed water treatment device according to claim 1, wherein the system operation controller (5) controls the switches and the working amplitudes of the electric valve and the electromagnetic valve to realize the control logic, so as to ensure that the system water is qualified and the concentrations of dissolved oxygen and sludge are kept in a reasonable interval.
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