CN115432863A - Urban sewage purification device - Google Patents

Urban sewage purification device Download PDF

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Publication number
CN115432863A
CN115432863A CN202211388485.7A CN202211388485A CN115432863A CN 115432863 A CN115432863 A CN 115432863A CN 202211388485 A CN202211388485 A CN 202211388485A CN 115432863 A CN115432863 A CN 115432863A
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China
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control unit
central control
real
weight
time
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CN115432863B (en
Inventor
毛卫青
孙鹏
章浩
李跃晖
何高峰
洪俊能
夏豪
朱建斌
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Frapp's Chemical Engineering Suichang Co ltd
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Frapp's Chemical Engineering Suichang Co ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5281Installations for water purification using chemical agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/008Control or steering systems not provided for elsewhere in subclass C02F
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/003Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/42Liquid level

Abstract

The invention relates to the technical field of sewage treatment, in particular to an urban sewage purification device which comprises a water inlet mechanism, a treatment mechanism, a separation mechanism and a central control unit. The invention presets standard metal ion concentration range and standard flocculation ratio in the central control unit, the central control unit sets the height of the treatment water level and the flocculating agent input amount by comparing the actual metal ion concentration with the standard metal ion concentration range, and judges the flocculation degree of heavy metal in the sewage by comparing the actual floccule weight with the standard flocculation weight, the central control unit can feed back and adjust the operation state of the system through the flocculation degree to ensure that the sewage purification effect reaches the standard, the purification device can automatically judge and adjust in the operation process, and is provided with a feedback adjustment mechanism, thereby not only adjusting the operation state in real time according to the ion concentration, having certain intelligence, but also ensuring the sewage purification effect through feedback adjustment.

Description

Urban sewage purification device
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an urban sewage purification device.
Background
With the increase of national economy and the improvement of the living standard of people, sewage of all walks of life of China is increased, a large amount of sewage is generated, the development of society and the physical and mental health of people are seriously influenced, especially, heavy metal wastewater in industrial wastewater seriously pollutes the environment and is difficult to degrade under natural conditions, so that the heavy metal wastewater can generate great harm to the health of people through the enrichment of a food chain, and the research on the treatment of heavy metal in urban sewage is necessary;
the current common heavy metal wastewater treatment method is a precipitation method, and the Chinese patent publication No.: CN109626647A discloses a method for treating industrial heavy metal sewage based on flocculation flotation precipitation, which uses a flocculant to precipitate heavy metal ions, and then uses a flotation column to perform flotation, and thus it can be seen that the following problems exist in the method for treating industrial heavy metal sewage based on flocculation flotation precipitation: the flocculant adding amount can not be controlled independently, secondary pollution is possibly caused, the stability of the whole process flow is not high, and in addition, the treated water quality can not be ensured to meet the discharge requirement.
Disclosure of Invention
Therefore, the invention provides an urban sewage purification device which is used for solving the problems that the treatment effect of heavy metals in sewage is poor and secondary pollution is easily caused in the prior art.
In order to achieve the above objects, the present invention provides an apparatus for purifying municipal sewage, comprising,
the water inlet mechanism is used for filtering metal debris in the sewage to be treated and detecting the real-time metal ion concentration of the sewage to be treated;
the treatment mechanism is connected with the water inlet mechanism and is used for flocculating metal ions in the sewage to be treated by adding a flocculating agent to form floccules, a treatment box and a feeding box are arranged in the treatment mechanism, and the feeding box can adjust the feeding amount of the flocculating agent according to the real-time metal ion concentration of the sewage to be treated in the treatment box;
the separation mechanism is connected with the treatment mechanism and is used for collecting the mixture of the sewage and the floccules and separating the floccules in the mixture, and a weight detector is arranged in the separation mechanism and is used for detecting the real-time weight of the floccules;
the central control unit is respectively connected with the water inlet mechanism, the treatment mechanism and the separation mechanism; the central control unit can set the treatment water level height of the treatment tank or adjust the input amount of the flocculating agent according to the real-time metal ion concentration of the sewage to be treated; the system is characterized in that a standard flocculation ratio A is arranged in the central control unit, the central control unit calculates theoretical floccule weight Me according to the real-time metal ion concentration Cs of the sewage to be treated, and calculates standard flocculation weight Mr according to the theoretical floccule weight Me and the standard flocculation ratio A, the central control unit compares the real-time floccule weight Ms detected by the weight detector with the standard flocculation weight Mr to judge whether the sewage treatment is up to the standard, if not, the central control unit sets the preset treatment water level height of the treatment tank according to the real-time floccule weight and adjusts the initial flocculant adding amount according to the preset treatment water level height.
Further, a standard metal ion concentration Cb and a standard metal ion concentration difference delta Cb are arranged in the central control unit, when the water inlet mechanism discharges the sewage to be treated in the water inlet pipeline into the treatment box through the first pump, a filter arranged on the water inlet pipeline can filter metal debris in the sewage to be treated, an ion concentration detector arranged in the water inlet mechanism detects the real-time metal ion concentration Cs of the sewage in the water inlet pipeline, the central control unit calculates the real-time metal ion concentration difference delta Cs and delta Cs = | Cb-Cs | of the sewage to be treated according to the standard metal ion concentration Cb and the real-time metal ion concentration Cs, and the central control unit compares the real-time ion concentration difference delta Cs with the standard ion concentration difference delta Cb,
when the delta Cs is less than or equal to the delta Cb, the central control unit judges that the real-time metal ion concentration difference of the sewage to be treated does not exceed the standard metal ion concentration difference, and the central control unit does not adjust the operation state of the sewage purification device;
and when the delta Cs is larger than the delta Cb, the central control unit judges that the real-time metal ion concentration difference of the sewage to be treated exceeds the standard metal ion concentration difference, compares the standard metal ion concentration Cb with the real-time metal ion concentration Cs, and sets the treatment water level height of the treatment tank or adjusts the input amount of the flocculating agent according to the real-time metal ion concentration.
Further, the central control unit is provided with an initial input amount Lc of the input box, when the central control unit judges that the real-time metal ion concentration difference of the sewage to be treated exceeds the standard metal ion concentration difference, the central control unit compares the standard metal ion concentration Cb with the real-time metal ion concentration Cs,
when Cs is less than Cb, the central control unit judges that the real-time metal ion concentration of the sewage to be treated is less than the standard metal ion concentration, and the central control unit adjusts the flocculating agent adding amount of the adding box to be Lc ', lc' = Lc x (Cs/Cb) according to the real-time metal ion concentration of the sewage to be treated;
when Cs is larger than Cb, the central control unit judges that the real-time metal ion concentration of the sewage to be treated is larger than the standard metal ion concentration, and the central control unit adjusts the height of the treatment water level of the treatment tank according to the real-time metal ion concentration.
Further, a preset treatment water level height Hy of the treatment tank is arranged in the central control unit, when the central control unit judges that the real-time metal ion concentration of the sewage to be treated is greater than the standard metal ion concentration, the central control unit sets the treatment water level height of the treatment tank as Hy ', hy' = Hy x (Cb/Cs) according to the real-time metal ion concentration of the sewage to be treated, when the central control unit sets the treatment water level height Hy 'of the treatment tank, a water level height gauge arranged in the treatment tank detects the real-time water level height Hs in the treatment tank, the central control unit compares the real-time water level height Hs with the treatment water level height Hy',
when Hs is less than Hy', the central control unit judges that the real-time water level is less than the treated water level, and controls the first pump to continuously convey water into the treatment tank;
when Hs = Hy', the central control unit judges that the real-time water level height is equal to the treatment water level height, and the central control unit controls the first pump machine to stop working, the flocculating agent is put in with initial input amount Lc by the input box, the electric vortex stirrer arranged in the treatment box stirs and stands the sewage to be treated by starting, and the separating mechanism collects and separates the mixture of water and floccule formed at the bottom of the treatment box.
Further, an up-to-standard flocculation ratio A is arranged in the central control unit, when the floccule collector arranged in the separation mechanism finishes collecting discharged floccules, the weight detector detects real-time floccule weight Ms, the central control unit obtains an actual water level height Hj of the sewage in the treatment and an actual input amount Lj of the flocculant, the central control unit can obtain actual treatment weight M of the sewage according to the actual water level height Hj of the sewage in the treatment box, the central control unit calculates theoretical floccule weight Me according to the actual treatment weight M of the sewage, the real-time metal ion concentration Cs and the actual input amount Lj of the flocculant, me = (M × Cs) + (Lj × K), wherein K is a flocculation conversion parameter, the central control unit calculates up-to-standard flocculation weight Mr and Mr = Me according to the up-to-standard flocculation ratio A, and compares the up-to-standard flocculation weight Mr with the real-time floccule weight Ms,
when Ms is smaller than Mr, the central control unit judges that the real-time floccule weight is lower than the standard floccule weight, and the central control unit adjusts the height of the preset treatment water level in the treatment tank according to the real-time floccule weight Ms;
and when the Ms is larger than or equal to Mr, the central control unit judges that the real-time floccule weight is not less than the standard flocculation weight, and the central control unit does not adjust the running state of the sewage purification device.
Further, when the real-time floc weight is judged to be lower than the standard floc weight, the central control unit can adjust the preset treatment water level height Hy of the treatment tank to Hys and Hys = Hj x (Ms/Ma) according to the real-time floc weight Ms, wherein Ma is the standard floc weight and Ma = (Me + Mr)/2, and the central control unit adjusts the initial flocculant adding amount Lc to Lcs and Lcs = Hys x (Lj/Hj) according to the preset water level height Hys; the central control unit controls the first pump machine to carry out secondary water delivery to the treatment tank, the central control unit repeatedly sets the treatment water level height of the treatment tank to Hys ' according to the real-time metal ion concentration of the sewage to be treated, hys ' = Hys x (Cb/Cs), controls the first pump machine to discharge the sewage to be treated to Hys ' into the treatment tank, puts the flocculating agent according to the actual input quantity Lj ' of the secondary flocculating agent obtained by the central control unit, and then carries out stirring, standing, separation, collection and drainage, and the central control unit compares the secondary real-time floccule weight Ms ' detected by the weight detector with the primary real-time floccule weight Ms,
when Ms 'is more than Ms, the central control unit judges that the weight of the secondary real-time floccules is higher than that of the primary real-time floccules, and the central control unit compares the weight Ms' of the secondary real-time floccules with the standard flocculation weight Mr to judge whether to continue to adjust or not;
when Ms' is less than or equal to Ms, the central control unit judges that the weight of the secondary real-time floccules is not higher than that of the primary real-time floccules, keeps the height of the primary preset water level unchanged, and adjusts the adding amount of the flocculating agent.
Further, the central control unit can compare the secondary real-time floccule weight Ms' with the standard flocculation weight Mr when judging that the secondary real-time floccule weight is higher than the primary real-time floccule weight,
when Ms' is more than or equal to Mr, the central control unit judges that the weight of the secondary real-time floccule is not less than the flocculation weight up to the standard, and the central control unit does not adjust the operation state of the sewage purification device;
when Ms' is less than Mr, the central control unit judges that the secondary real-time floccule weight is lower than the standard flocculation weight, the central control unit repeatedly adjusts the preset treatment water level height and the initial input amount of the flocculating agent in the treatment tank according to the real-time floccule weight, and performs calculation and judgment until the calculated real-time floccule weight is not lower than the standard flocculation weight, and the central control unit judges that the adjustment is finished.
Further, the central control unit can adjust the initial input amount Lc of the flocculating agent to Lct, lct = Lj x (Ma/Ms) and control the first pump to carry out three times of water delivery to the treatment tank when judging that the secondary real-time floc weight is not higher than the primary real-time floc weight, the central control unit repeats the steps of setting the treatment water level height of the treatment tank to Hy ', hy ' = Hy x (Cb/Cs) according to the real-time metal ion concentration of the sewage to be treated, controlling the first pump to discharge the sewage to Hy ' into the treatment tank, inputting the flocculating agent according to the actual input amount Lj ' of the flocculating agent obtained by the central control unit, then carrying out stirring, standing, separation, collection and drainage, and then the central control unit compares the weight Ms ' of the tertiary real-time floc detected by the weight detector with the flocculation weight Mr,
when Ms is larger than Mr, the central control unit judges that the weight of the three-time real-time floccules is higher than the flocculation weight up to the standard, and the central control unit does not adjust the running state of the sewage purification device;
and when Ms is less than or equal to Mr, the central control unit judges that the weight of the three-time real-time floccules is not higher than the flocculation weight up to the standard, and controls the urban sewage purification device to stop running for stopping inspection.
Further, the treatment tank comprises a plurality of treatment chambers,
the electric vortex stirrer is arranged inside the treatment tank and is used for stirring the sewage to be treated in the treatment tank;
the water level height meter is arranged on the side wall inside the treatment tank and is used for detecting the real-time water level height of the sewage to be treated in the treatment tank;
the main water outlet pipeline is arranged on one side of the treatment tank and used for discharging sewage which is treated in the treatment tank;
and the lifting scraper is arranged at the top end inside the treatment box and is used for scraping grease foam on the surface layer of sewage inside the treatment box to a foam collecting tank from a discharge and floating outlet on the side wall of the treatment box.
Further, the separation mechanism includes, in addition,
a mixing collector connected to the bottom of the treatment tank for collecting the mixture of water and floe from the bottom of the treatment tank;
the separation tank is arranged at the bottom of the mixing collector and is used for separating water and floccules in the mixture, an auxiliary water outlet pipeline is arranged on the side wall of the separation tank, and a second pump is arranged on the auxiliary water outlet pipeline and is used for discharging water separated by the separation tank into the main water outlet pipeline;
and the floccule collector is arranged at the bottom of the separation box and is used for collecting the floccule separated by the separation box.
Compared with the prior art, the sewage treatment device has the advantages that the filter is arranged on the water inlet mechanism, so that the pretreatment of metal fragments in the sewage is realized, the possibility of blockage of the first pump in the operation process is avoided, the service life of the pump is prolonged, the first pump is arranged on the water inlet mechanism, the central control unit can control the treatment water level height of the treatment tank according to the pressure of the pump, the treatment water level height of the treatment tank can be adjusted according to the real-time metal ion concentration, and the stable operation of the sewage treatment device is guaranteed; meanwhile, the electric vortex stirrer is arranged on the treatment mechanism, so that metal ions and grease in the sewage are ensured to be fully contacted with the flocculating agent respectively, and the removal efficiency of the metal ions and the grease is improved; through setting up the weight detector at separating mechanism, the real-time flocculus weight of detectable, well accuse unit can be with real-time flocculus weight and the contrast of flocculation weight up to standard, whether up to standard with judging the sewage treatment effect, not up to standard, well accuse unit can be according to real-time flocculus weight real-time adjustment sewage purification device's running state up to real-time flocculus weight up to standard, this feedback control has greatly guaranteed this sewage purification device's treatment effect, and easy operation, make this sewage purification device more intelligent, simultaneously, well accuse unit can be adjusted the flocculating agent input volume according to real-time metal ion concentration, the excessive use of flocculating agent when having avoided metal ion concentration low, the cost of raw and other materials has both been saved, secondary pollution has also been avoided.
Furthermore, a standard metal ion concentration range formed by the standard metal ion concentration and the standard metal ion concentration difference is arranged in the central control unit, and the central control unit compares the real-time metal ion concentration with the standard metal ion concentration range to judge whether the operation state of the sewage purification device is adjusted or not, so that the working precision of the sewage purification device is improved, the stable operation of the sewage purification device is also ensured, and the purification efficiency of the sewage purification device is improved.
Particularly, when the real-time metal ion concentration of the sewage to be treated is smaller than the standard metal ion concentration, under the condition of ensuring that the sewage treatment water amount is not changed, the amount of the metal ions in the sewage is lower than the amount of the metal ions calculated by the standard metal ion concentration range arranged in the central control unit, the central control unit reduces the flocculating agent adding amount of the adding box, the using amount of the flocculating agent is saved, secondary pollution of excessive flocculating agent to the environment is avoided, the operation precision of the sewage purification device is improved, when the real-time metal ion concentration of the sewage to be treated is greater than the standard metal ion concentration, the central control unit adjusts the treatment water level height of the treating box according to the real-time metal ion concentration, the central control unit adjusts different parameters according to the different ion concentration conditions, the stable operation of the sewage purification device is ensured, and the intelligence of the sewage purification device is embodied.
Furtherly, through having set up electronic vortex agitator at processing agency, guaranteed in the sewage metal ion, grease respectively with the abundant contact of flocculating agent, improved the efficiency of getting rid of metal ion and grease, through set up water level altimeter and lift scraper at processing agency, well accuse unit can be according to handling the height of water level height real-time regulation lift scraper, guaranteed that grease foam can maximum strike off, further improved the efficiency of getting rid of grease, guaranteed sewage purification's effect.
Furthermore, the separating mechanism is provided with the separating box, the separating box can separate the mixture of water and floccules, and the second pump machine discharges the separated water into the main water outlet pipeline, so that the amount of waste to be treated is reduced, and the efficiency of the sewage purification device is improved.
Particularly, the central control unit is internally provided with a preset treatment water level height of the treatment tank, when the real-time metal ion concentration of the sewage to be treated is greater than the standard metal ion concentration, the central control unit reduces the treatment water level height of the treatment tank under the condition of ensuring that the flocculating agent feeding amount is not changed, so that the sewage treatment water amount is reduced, the amount of metal ions in the sewage is ensured to be in the range of the amount of metal ions calculated by the standard ion concentration range arranged in the central control unit, the problems of poor flocculation degree and poor purification effect caused by excessive amount of heavy metal ions in the sewage are avoided, the normal operation of the sewage purification device is ensured, the purification effect of the sewage purification device is also ensured, and the operation precision of the sewage purification device is improved; the flocculating agent forms the flocculating constituent with the metal ion contact, and the flocculating agent forms the grease foam with the grease contact, is provided with in the well accuse unit the churning time of electronic vortex agitator has guaranteed the abundant contact of flocculating agent with metal ion and grease, has improved the efficiency of getting rid of metal ion and grease, is provided with in the well accuse unit the time of stewing of handling the case has given the time that grease foam come-up and flocculating constituent deposit, has further improved the efficiency of getting rid of metal ion and grease, has ensured sewage purification device's purifying effect.
Furthermore, a standard flocculation ratio is arranged in the central control unit, the flocculation ratio refers to the percentage of heavy metal ions flocculated by the flocculating agent to all heavy metal ions in the sewage, the standard flocculation ratio is set according to the requirement of urban sewage treatment, the weight detector detects the weight Ms of the collected real-time flocs by the floc collector, the central control unit calculates the theoretical floc weight Me according to the actual treatment weight M of the sewage, the real-time metal ion concentration Cs and the actual input quantity Lj of the flocculating agent, me = (M × Cs) + (Lj × K), wherein K is a flocculation conversion parameter, the flocculation conversion parameter is set according to the actual condition of the sewage to be treated, the type of the flocculating agent and the flocculation condition of the flocculating agent and the metal ions, the central control unit judges whether the purification effect of the sewage purification device reaches the standard or not according to the comparison of the standard flocculation weight and the real-time floc weight, if the purification effect of the sewage purification device does not reach the standard, the operation state of the sewage purification device is adjusted, the sewage purification effect of the sewage can be intelligently detected by the sewage purification device and the purification efficiency of the sewage is improved.
Especially, when the central control unit judges that the purifying effect of the sewage purifying device does not reach the standard, the central control unit adjusts the preset water level height of the treatment box according to the real-time floccule weight, and adjusts the initial flocculating agent input amount according to the real-time inlet water level height and the real-time flocculating agent input amount, then the sewage purifying device is operated to carry out secondary inlet water inlet and treatment, the central control unit judges whether the regulation can improve the sewage purifying effect or not according to the comparison between the secondary real-time floccule weight and the primary real-time floccule weight, the central control unit adjusts the parameters of the secondary inlet water treatment according to the feedback of the primary effect, thereby ensuring that the purifying effect of the sewage purifying device is improved, and the central control unit carries out self-adjustment, the operation is simple, and the use is convenient.
Especially, when the weight of the secondary real-time floccules is larger than that of the primary real-time floccules, the central control unit judges that the adjusted parameters improve the purification effect, compares the weight of the secondary real-time floccules with the flocculation weight reaching the standard to judge whether the secondary purification effect reaches the standard, if so, the central control unit does not adjust the operation state any more, and if not, the central control unit repeats the secondary adjustment method until the sewage purification effect reaches the standard, thereby ensuring the quality of sewage purification and intelligently improving the operation efficiency of the sewage purification device.
Further, when the secondary real-time floccule weight does not exceed the primary real-time floccule weight, the central control unit judges that the adjusted parameters do not improve the purification effect, the central control unit keeps the preset water level height of the primary purified water unchanged, adjusts the initial adding amount of the flocculating agent according to the real-time floccule weight, then operates the sewage purification device to carry out three times of water inlet and treatment, the central control unit judges whether the adjustment leads the purification effect of the sewage purification device to reach the standard or not according to the comparison of the three times of real-time floccule weight and the standard flocculation weight, if the adjustment leads the purification effect of the sewage purification device to reach the standard, the central control unit does not adjust the operation state any more, if the adjustment does not reach the standard, the central control unit stops the operation of the control device and carries out shutdown inspection, and adjusts the parameters of the three times of water inlet treatment according to the feedback of the secondary effect, thereby ensuring that the purification effect of the sewage purification device is improved, and the central control unit carries out self-adjustment, the operation is simple and convenient to use, thereby ensuring the quality of sewage purification and intelligently improving the operation efficiency of the sewage purification device.
Drawings
Fig. 1 is a schematic structural diagram of the municipal sewage purification device according to the embodiment.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In this embodiment, municipal sewage purification device mainly contains heavy metal and grease's waste water to cutting process waste water and other aquatic, and the municipal sewage purification device that this embodiment provided only handles heavy metal and grease in the sewage, does not consider in the device to other pollutants in the sewage.
Fig. 1 is a schematic structural diagram of an urban sewage purification apparatus according to the present embodiment; the invention discloses a municipal sewage purification device, which comprises a water inlet mechanism 1, a water inlet pipeline 101, a first pump 102, a filter 103, an ion concentration detector 104, a treatment mechanism 2, a treatment tank 201, an electric vortex stirrer 203, a water level height meter 204, a throwing tank 205, a main water outlet pipeline 206, a lifting scraper 207, a foam collecting tank 208, a floating outlet 209, a separation mechanism 3, a mixing collector 301, a separation tank 302, a floccule collector 303, an auxiliary water outlet pipeline 304, a second pump 305, a weight detector 306 and a central control unit (not shown in the figure), wherein,
the water inlet mechanism 1 is used for filtering metal debris in the sewage to be treated and detecting the real-time metal ion concentration of the sewage to be treated;
the treatment mechanism 2 is connected with the water inlet mechanism 1 and is used for flocculating metal ions in sewage to be treated by adding a flocculating agent to form floccules, the treatment mechanism 2 comprises a treatment tank 201 and a feeding tank 205, and the feeding tank 205 can adjust the adding amount of the flocculating agent according to the real-time metal ion concentration of the sewage to be treated in the treatment tank 201;
a separating mechanism 3 connected to the treating mechanism 2 for collecting the mixture of sewage and floc and separating the floc in the mixture, wherein the separating mechanism 3 includes a weight detector 306 for detecting the real-time weight of the floc;
the central control unit is respectively connected with the water inlet mechanism 1, the treatment mechanism 2 and the separation mechanism 3; the central control unit can set the treatment water level height of the treatment tank 201 or adjust the input amount of the flocculating agent according to the real-time metal ion concentration of the sewage to be treated; the central control unit is internally provided with a standard flocculation ratio A, calculates theoretical floccule weight Me according to the real-time metal ion concentration Cs of the sewage to be treated, calculates standard flocculation weight Mr according to the theoretical floccule weight Me and the standard flocculation ratio A, compares the real-time floccule weight Ms detected by the weight detector 306 with the standard flocculation weight Mr, judges whether the sewage treatment is up to the standard or not, sets a preset treatment water level height of the treatment tank 201 according to the real-time floccule weight if the sewage treatment is not up to the standard, and adjusts the initial flocculant adding amount according to the preset treatment water level height.
The filter 103 is arranged on the water inlet mechanism 1, so that the pretreatment of metal fragments in the sewage is realized, the possibility of blockage of the first pump 102 in the operation process is avoided, the service life of the pump is prolonged, the central control unit can control the treatment water level height of the treatment tank 201 by adjusting the pressure of the pump through installing the first pump 102 on the water inlet mechanism 1, the treatment water level height of the treatment tank 201 can be adjusted according to the real-time metal ion concentration, and the stable operation of the sewage purification device is ensured; meanwhile, the electric vortex stirrer 203 is arranged on the treatment mechanism 2, so that metal ions and grease in the sewage are ensured to be fully contacted with the flocculating agent respectively, and the removal efficiency of the metal ions and the grease is improved; through setting up weight detector 306 at separating mechanism 3, the real-time flocculus weight of detectable, well accuse unit can be with real-time flocculus weight and the contrast of flocculation weight up to standard, whether up to standard with judging sewage treatment effect, not up to standard, well accuse unit can be up to standard according to real-time flocculus weight real-time adjustment sewage purification device's running state until real-time flocculus weight, this feedback control has greatly guaranteed this sewage purification device's treatment effect, and easy operation, make this sewage purification device more intelligent, simultaneously, well accuse unit can be adjusted the flocculating agent input volume according to real-time metal ion concentration, the excessive use of flocculating agent when having avoided metal ion concentration low, the cost of raw and other materials has both been saved, secondary pollution has also been avoided.
Specifically, a standard metal ion concentration Cb and a standard metal ion concentration difference Δ Cb are arranged in the central control unit, when the water inlet mechanism 1 discharges the sewage to be treated in the water inlet pipeline 101 into the treatment tank 201 through the first pump 102, the filter 103 arranged on the water inlet pipeline 101 can filter metal debris in the sewage to be treated, the ion concentration detector 104 arranged in the water inlet mechanism 1 detects the real-time metal ion concentration Cs of the sewage in the water inlet pipeline 101, the central control unit calculates the real-time metal ion concentration difference Δ Cs, Δ Cs = | Cb-Cs | of the sewage to be treated according to the standard metal ion concentration Cb and the real-time metal ion concentration Cs, and the central control unit compares the real-time ion concentration difference Δ Cs with the standard ion concentration difference Δ Cb,
when the delta Cs is less than or equal to the delta Cb, the central control unit judges that the real-time metal ion concentration difference of the sewage to be treated does not exceed the standard metal ion concentration difference, and the central control unit does not adjust the operation state of the sewage purification device;
when Δ Cs is greater than Δ Cb, the central control unit determines that the real-time metal ion concentration difference of the sewage to be treated exceeds the standard metal ion concentration difference, compares the standard metal ion concentration Cb with the real-time metal ion concentration Cs, and sets the treatment water level height of the treatment tank 201 or adjusts the input amount of the flocculant according to the real-time metal ion concentration.
By setting a standard metal ion concentration range consisting of a standard metal ion concentration difference and a standard metal ion concentration difference in the central control unit, the ion concentration detector 104 can acquire the real-time metal ion concentration of the sewage to be treated in different ways according to the actual condition of sewage purification, for example, after the central control unit sets the treatment water level height of the treatment tank 201, the ion concentration detector 104 can randomly detect the metal ion concentration n times between the time when the treatment tank 201 starts to intake water and the time when the intake water height reaches the treatment water level height, the average value is taken as the real-time metal ion concentration of the intake water, and the central control unit compares the real-time metal ion concentration with the standard metal ion concentration range to judge whether to adjust the operation state of the sewage purification device, so that the working precision of the sewage purification device is improved, the stable operation of the sewage purification device is also ensured, and the purification efficiency of the sewage purification device is improved.
Specifically, the central control unit is provided with an initial input amount Lc of the input box 205, and when the central control unit determines that the real-time metal ion concentration difference of the sewage to be treated exceeds the standard metal ion concentration difference, the central control unit compares the standard metal ion concentration Cb with the real-time metal ion concentration Cs,
when Cs is less than Cb, the central control unit judges that the real-time metal ion concentration of the sewage to be treated is less than the standard metal ion concentration, and the central control unit adjusts the flocculating agent adding amount of the adding box 205 to be Lc ', lc' = Lc x (Cs/Cb) according to the real-time metal ion concentration of the sewage to be treated;
when Cs is larger than Cb, the central control unit judges that the real-time metal ion concentration of the sewage to be treated is larger than the standard metal ion concentration, and the central control unit adjusts the height of the treatment water level of the treatment tank 201 according to the real-time metal ion concentration.
When the real-time metal ion concentration of the sewage to be treated is smaller than the standard metal ion concentration, under the condition of ensuring that the sewage treatment water quantity is not changed, the metal ion amount in the sewage is lower than the metal ion amount calculated by the standard metal ion concentration range arranged in the central control unit, the central control unit reduces the flocculating agent adding amount of the adding box 205, the use amount of the flocculating agent is saved, secondary pollution of excessive flocculating agent to the environment is avoided, the operation precision of the sewage purification device is improved, when the real-time metal ion concentration of the sewage to be treated is greater than the standard metal ion concentration, the central control unit adjusts the treatment water level height of the treatment box 201 according to the real-time metal ion concentration, the central control unit adjusts different parameters according to the different ion concentration conditions, the stable operation of the sewage purification device is ensured, and the intelligence of the sewage purification device is also embodied.
Specifically, the processing tank 201 includes,
an electric vortex mixer 203 arranged inside the treatment tank 201 for mixing the sewage to be treated in the treatment tank 201;
a water level gauge 204 disposed on the inner sidewall of the treatment tank 201 for detecting the real-time water level of the wastewater to be treated in the treatment tank 201;
a main water outlet pipe 206 provided at one side of the treatment tank 201 for discharging the sewage subjected to the treatment in the treatment tank 201;
and the lifting scraper 207 is arranged at the top end inside the treatment tank 201 and is used for scraping the grease foam on the surface layer of the sewage inside the treatment tank 201 out of the discharge and floating outlet 209 on the side wall of the treatment tank 201 to the foam collecting tank 208.
Through having set up electronic vortex agitator 203 at processing agency 2, guaranteed in the sewage metal ion, grease respectively with the abundant contact of flocculating agent, improved the efficiency of getting rid of metal ion and grease, through set up water level altimeter 204 and lift scraper 207 at processing agency 2, well accuse unit can be according to handling the height of water level height real-time regulation lift scraper 207, guaranteed that grease foam can maximum strike off, further improved the efficiency of getting rid of grease, guaranteed sewage purification's effect.
Specifically, the separating mechanism 3 includes, for example,
a mixing collector 301 connected to the bottom of the treatment tank 201 for collecting a mixture of water and flocs from the bottom of the treatment tank 201;
a separation tank 302 disposed at the bottom of the mixing collector 301 for separating water from flocs in the mixture, a secondary outlet pipe 304 disposed on a sidewall of the separation tank 302, and a second pump 305 disposed on the secondary outlet pipe 304 for discharging the water separated in the separation tank 302 into the main outlet pipe 206;
a floe collector 303 disposed at the bottom of the separation tank 302 for collecting floe separated from the separation tank 302.
By providing the separation tank 302 in the separation mechanism 3, the separation tank 302 can separate the mixture of water and floc, and the second pump 305 discharges the separated water into the main outlet pipe 206, thereby reducing the amount of waste to be treated and improving the efficiency of the sewage purification apparatus.
Specifically, a preset treatment water level height Hy of the treatment tank 201 is arranged in the central control unit, when the central control unit determines that the real-time metal ion concentration of the sewage to be treated is greater than the standard metal ion concentration, the central control unit sets the treatment water level height of the treatment tank 201 to be Hy ', hy' = Hy x (Cb/Cs) according to the real-time metal ion concentration of the sewage to be treated, when the central control unit sets the treatment water level height Hy 'of the treatment tank 201, the water level height gauge 204 detects the real-time water level height Hs in the treatment tank 201, the central control unit compares the real-time water level height Hs with the treatment water level height Hy',
when Hs is less than Hy', the central control unit determines that the real-time water level is less than the treatment water level, and the central control unit controls the first pump 102 to continuously convey water into the treatment tank 201;
when Hs = Hy', the central control unit determines that the real-time water level is equal to the treatment water level, the central control unit controls the first pump 102 to stop working, the dosing tank 205 doses the flocculant with the initial dosing amount Lc, the electric vortex stirrer 203 starts stirring and stands still, and the separation mechanism 3 collects and separates the mixture of water and floccule formed at the bottom of the treatment tank 201.
The central control unit is internally provided with a preset treatment water level height of the treatment tank 201, when the real-time metal ion concentration of the sewage to be treated is greater than the standard metal ion concentration, the central control unit reduces the treatment water level height of the treatment tank 201 under the condition of ensuring that the flocculating agent feeding amount is not changed, so that the sewage treatment water amount is reduced, the amount of metal ions in the sewage is ensured to be in the range of the amount of metal ions calculated by the standard ion concentration range arranged in the central control unit, the problems of poor flocculation degree and poor purification effect caused by excessive amount of heavy metal ions in the sewage are avoided, the normal operation of the sewage purification device is ensured, the purification effect of the sewage purification device is also ensured, and the operation precision of the sewage purification device is improved; the flocculating agent forms the flocculating constituent with the metal ion contact, and the flocculating agent forms the grease foam with the grease contact, is provided with in the well accuse unit the churning time of electronic vortex agitator 203 has guaranteed the abundant contact of flocculating agent with metal ion and grease, has improved the efficiency of getting rid of metal ion and grease, is provided with in the well accuse unit the time of stewing of handling case 201 has given the time of grease foam come-up and flocculating constituent deposit, has further improved the efficiency of getting rid of metal ion and grease, has ensured sewage purification device's purifying effect.
Specifically, an up-to-standard flocculation ratio a is arranged in the central control unit, when the floc collector 303 finishes collecting discharged flocs, the weight detector 306 detects the real-time floc weight Ms, the central control unit obtains the actual water level height Hj of the sewage in the treatment tank and the actual input amount Lj of the flocculant, the central control unit can obtain the actual treatment weight M of the sewage according to the actual water level height Hj of the sewage in the treatment tank 201, the central control unit calculates the theoretical floc weight Me according to the actual treatment weight M of the sewage, the real-time metal ion concentration Cs and the actual input amount Lj of the flocculant, me = (M × Cs) + (Lj × K), wherein K is a flocculation conversion parameter, the central control unit calculates the up-to-standard flocculation weight Mr according to the theoretical floc weight Me and the up-to-standard flocculation ratio a, mr = Me × a, the central control unit compares the up-to-standard flocculation weight Mr with the real-time floc weight Ms,
when Ms is less than Mr, the central control unit judges that the real-time floccule weight is lower than the standard floccule weight, and adjusts the height of a preset treatment water level in the treatment tank 201 according to the real-time floccule weight Ms;
and when the Ms is larger than or equal to Mr, the central control unit judges that the real-time floccule weight is not less than the standard flocculation weight, and the central control unit does not adjust the running state of the sewage purification device.
The central control unit is internally provided with a standard flocculation ratio, wherein the standard flocculation ratio refers to the percentage of heavy metal ions flocculated by a flocculating agent to all heavy metal ions in sewage, the standard flocculation ratio is set according to the requirement of urban sewage treatment, the weight detector 306 detects the weight Ms of the finished real-time floccules collected by the floccule collector 303, the central control unit calculates the theoretical floccule weight Me according to the actual treatment weight M of the sewage, the real-time metal ion concentration Cs and the actual input quantity Lj of the flocculating agent, me = (M × Cs) + (Lj × K), wherein K is a flocculation conversion parameter, the flocculation conversion parameter is set according to the actual condition of the sewage to be treated, the type of the flocculating agent and the flocculation condition of the flocculating agent and the metal ions, the central control unit judges whether the purification effect of the sewage purification device reaches the standard or not according to the comparison of the standard flocculation weight and the real-time floccule weight, if not reaching the standard flocculation weight is not reached, the operation state of the sewage purification device is adjusted, the sewage purification device can intelligently detect the purification effect of the sewage and adjust timely, and the efficiency of the device is improved.
Specifically, when the central control unit determines that the real-time floc weight is lower than the standard floc weight, the central control unit adjusts the preset treatment water level height Hy of the treatment tank 201 to Hy according to the real-time floc weight Ms, and Hy = Hj x (Ms/Ma), where Ma is the standard floc weight and Ma = (Me + Mr)/2, and the central control unit adjusts the initial flocculant adding amount Lc to Lcs, lcs = Hys x (Lj/Hj) according to the preset water level height Hy; the central control unit controls the first pump 102 to deliver water to the treatment tank 201 for the second time, the central control unit repeats the above steps of setting the height of the treatment water level of the treatment tank 201 as Hys ', hys ' = Hys × (Cb/Cs) according to the real-time metal ion concentration of the sewage to be treated, controlling the first pump 102 to discharge the sewage to be treated into the treatment tank 201 to Hys ', adding the flocculant according to the actual adding amount Lj ' of the secondary flocculant obtained by the central control unit, stirring, standing, separating, collecting and discharging, and then the central control unit compares the secondary real-time floccule weight Ms ' detected by the weight detector 306 with the primary real-time floccule weight Ms,
when Ms 'is more than Ms, the central control unit judges that the weight of the secondary real-time floccules is higher than that of the primary real-time floccules, and the central control unit compares the weight Ms' of the secondary real-time floccules with the standard flocculation weight Mr to judge whether to continue to adjust or not;
when Ms' is less than or equal to Ms, the central control unit judges that the weight of the secondary real-time floccules is not higher than that of the primary real-time floccules, the central control unit keeps the height of the primary preset water level unchanged, and the adding amount of the flocculating agent is adjusted.
When accuse unit judges that sewage purification device's purifying effect does not reach standard in the middle, well accuse unit will be according to the predetermined water level height of real-time floccule weight adjustment treatment tank 201, and according to the actual water level height of intaking and the initial volume of puting in of flocculating agent actual input volume adjustment flocculating agent, then operate this sewage purification device and carry out the secondary and intake and handle, well accuse unit judges this time to adjust again according to the contrast of the real-time floccule weight of secondary and real-time floccule weight and whether can improve sewage purification effect, well accuse unit adjusts the parameter of secondary processing of intaking according to the feedback of an effect, with this purifying effect who guarantees this sewage purification device improves, and be the self-interacting that well accuse unit goes on, and easy operation, high durability and convenient use.
Specifically, when the central control unit judges that the weight of the secondary real-time floccule is higher than the weight of the primary real-time floccule, the central control unit compares the weight Ms' of the secondary real-time floccule with the weight Mr of the standard flocculation,
when Ms' is more than or equal to Mr, the central control unit judges that the weight of the secondary real-time floccule is not less than the flocculation weight up to the standard, and the central control unit does not adjust the operation state of the sewage purification device;
when Ms' is less than Mr, the central control unit judges that the secondary real-time floccule weight is lower than the standard flocculation weight, the central control unit repeatedly adjusts the preset treatment water level height and the initial input amount of the flocculating agent in the treatment tank 201 according to the real-time floccule weight, and performs calculation and judgment until the calculated real-time floccule weight is not lower than the standard flocculation weight, and the central control unit judges that the adjustment is finished.
When the secondary real-time floccule weight is larger than the primary real-time floccule weight, the central control unit judges the adjusted parameters to improve the purification effect, compares the secondary real-time floccule weight with the standard flocculation weight to judge whether the secondary purification effect is up to standard, if so, the central control unit does not adjust the operation state any more, if not, the central control unit repeats the secondary adjustment method until the sewage purification effect is up to standard, thereby ensuring the quality of sewage purification and intelligently improving the operation efficiency of the sewage purification device.
Specifically, when the central control unit judges that the weight of the secondary real-time floccule is not higher than that of the primary real-time floccule, the central control unit keeps the primary preset water level height Hy unchanged, and adjusts the initial feeding amount Lc of the flocculating agent to be Lct, lct = Lj x (Ma/Ms); the central control unit controls the first pump 102 to deliver water to the treatment tank 201 for three times, the central control unit repeats the steps of setting the height of the treatment water level of the treatment tank 201 to Hy ', hy ' = Hy x (Cb/Cs) according to the real-time metal ion concentration of the sewage to be treated, controlling the first pump 102 to discharge the sewage to be treated to Hy ' into the treatment tank 201, adding the flocculating agent according to the actual adding amount Lj ' of the flocculating agent obtained by the central control unit for three times, stirring, standing, separating, collecting and discharging, and comparing the weight Ms ' of the flocs detected by the weight detector 306 with the standard flocculation weight Mr by the central control unit,
when Ms is larger than Mr, the central control unit judges that the weight of the three-time real-time floccules is higher than the flocculation weight up to the standard, and the central control unit does not adjust the running state of the sewage purification device;
when Ms is less than or equal to Mr, the central control unit judges that the three-time real-time floccule weight is not higher than the flocculation weight up to the standard, and the central control unit controls the urban sewage purification device to stop running for shutdown inspection.
When the secondary real-time floccule weight does not exceed the primary real-time floccule weight, the central control unit judges that the adjusted parameters do not improve the purification effect, the central control unit keeps the preset water level height of primary purified water unchanged, adjusts the initial input amount of the flocculating agent according to the real-time floccule weight, then operates the sewage purification device to carry out tertiary water inlet and treatment, the central control unit judges whether the adjustment enables the purification effect of the sewage purification device to reach the standard or not according to the comparison of the tertiary real-time floccule weight and the standard flocculation weight, if the adjustment achieves the standard, the central control unit does not adjust the operation state, if the adjustment does not achieve the standard, the central control unit stops operating the control device to carry out shutdown inspection, and adjusts the parameters of the tertiary water inlet treatment according to the feedback of the secondary effect, so as to ensure that the purification effect of the sewage purification device is improved, and the central control unit carries out self-adjustment.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A municipal sewage purification device is characterized by comprising,
the water inlet mechanism is used for filtering metal debris in the sewage to be treated and detecting the real-time metal ion concentration of the sewage to be treated;
the treatment mechanism is connected with the water inlet mechanism and is used for flocculating metal ions in the sewage to be treated by adding a flocculating agent to form floccules, the treatment mechanism comprises a treatment box and an adding box, and the adding box can adjust the adding amount of the flocculating agent according to the real-time metal ion concentration of the sewage to be treated in the treatment box;
the separation mechanism is connected with the treatment mechanism and is used for collecting the mixture of the sewage and the floccules and separating the floccules in the mixture, and a weight detector is arranged in the separation mechanism and is used for detecting the real-time weight of the floccules;
the central control unit is respectively connected with the water inlet mechanism, the treatment mechanism and the separation mechanism; the central control unit can set the treatment water level height of the treatment tank or adjust the input amount of the flocculating agent according to the real-time metal ion concentration of the sewage to be treated; the system is characterized in that a standard flocculation ratio A is arranged in the central control unit, the central control unit calculates theoretical floccule weight Me according to the real-time metal ion concentration Cs of the sewage to be treated, and calculates standard flocculation weight Mr according to the theoretical floccule weight Me and the standard flocculation ratio A, the central control unit compares the real-time floccule weight Ms detected by the weight detector with the standard flocculation weight Mr to judge whether the sewage treatment is up to the standard, if not, the central control unit sets the preset treatment water level height of the treatment tank according to the real-time floccule weight and adjusts the initial flocculant adding amount according to the preset treatment water level height.
2. The municipal sewage purification device according to claim 1, wherein the central control unit is provided therein with a standard metal ion concentration Cb and a standard metal ion concentration difference Δ Cb, when the water inlet mechanism discharges the sewage to be treated in the water inlet pipe to the treatment tank through the first pump, the filter provided on the water inlet pipe can filter metal debris in the sewage to be treated, the ion concentration detector provided in the water inlet mechanism detects the real-time metal ion concentration Cs of the sewage in the water inlet pipe, the central control unit calculates the real-time metal ion concentration difference Δ Cs, Δ Cs = | Cb-Cs | of the sewage to be treated according to the standard metal ion concentration Cb and the real-time metal ion concentration Cs, and compares the real-time ion concentration difference Δ Cs with the standard ion concentration difference Δ Cb,
when the delta Cs is less than or equal to the delta Cb, the central control unit judges that the real-time metal ion concentration difference of the sewage to be treated does not exceed the standard metal ion concentration difference, and the central control unit does not adjust the running state of the sewage purification device;
and when the delta Cs is greater than the delta Cb, the central control unit judges that the real-time metal ion concentration difference of the sewage to be treated exceeds the standard metal ion concentration difference, compares the standard metal ion concentration Cb with the real-time metal ion concentration Cs, and sets the treatment water level height of the treatment tank or adjusts the input amount of the flocculating agent according to the real-time metal ion concentration.
3. The municipal sewage purification device according to claim 2, wherein the central control unit is provided with an initial charge amount Lc of the charge tank, and when the central control unit determines that the real-time metal ion concentration difference of the sewage to be treated exceeds the standard metal ion concentration difference, the central control unit compares the standard metal ion concentration Cb with the real-time metal ion concentration Cs,
when Cs is less than Cb, the central control unit judges that the real-time metal ion concentration of the sewage to be treated is less than the standard metal ion concentration, and the central control unit adjusts the flocculating agent adding amount of the adding box to be Lc ', lc' = Lc x (Cs/Cb) according to the real-time metal ion concentration of the sewage to be treated;
when Cs is larger than Cb, the central control unit judges that the real-time metal ion concentration of the sewage to be treated is larger than the standard metal ion concentration, and the central control unit adjusts the height of the treatment water level of the treatment tank according to the real-time metal ion concentration.
4. The municipal sewage purification device according to claim 3, wherein the central control unit is provided therein with a preset treatment water level height Hy of the treatment tank, when the central control unit determines that the real-time metal ion concentration of the sewage to be treated is greater than the standard metal ion concentration, the central control unit sets the treatment water level height of the treatment tank to Hy ', hy' = Hy x (Cb/Cs) according to the real-time metal ion concentration of the sewage to be treated, and when the central control unit sets the treatment water level height Hy 'of the treatment tank to be completed, the water level height gauge provided in the treatment tank detects the real-time water level height Hs in the treatment tank, and the central control unit compares the real-time water level height Hs with the treatment water level height Hy',
when Hs is less than Hy', the central control unit judges that the real-time water level is less than the treated water level, and controls the first pump to continuously convey water into the treatment tank;
when Hs = Hy', the central control unit judges that the real-time water level height is equal to the treatment water level height, and the central control unit controls the first pump machine to stop working, the flocculating agent is put in with initial input amount Lc by the input box, the electric vortex stirrer arranged in the treatment box stirs and stands the sewage to be treated by starting, and the separating mechanism collects and separates the mixture of water and floccule formed at the bottom of the treatment box.
5. The municipal sewage purification apparatus according to claim 4, wherein the central control unit has a flocculation weight up to standard A, the weight detector detects the real-time floc weight Ms when the floc collector disposed in the separation mechanism collects the discharged flocs, the central control unit obtains the actual water level height Hj of the sewage in the treatment and the actual input amount Lj of the flocculant, the central control unit obtains the actual treatment weight M of the sewage according to the actual water level height Hj of the sewage in the treatment tank, the central control unit calculates the theoretical floc weight Me, me = (MxCs) + (Lj x K) according to the actual treatment weight M of the sewage, the real-time metal ion concentration Cs and the actual input amount Lj of the flocculant, K is a flocculation conversion parameter, the central control unit calculates the flocculation weight Mr up to standard according to the theoretical floc weight Me and the flocculation weight A, mr = Me x A, and compares the flocculation weight Mr up to standard with the real-time floc weight Ms,
when Ms is smaller than Mr, the central control unit judges that the real-time floccule weight is lower than the standard floccule weight, and the central control unit adjusts the height of the preset treatment water level in the treatment tank according to the real-time floccule weight Ms;
and when the Ms is more than or equal to the Mr, the central control unit judges that the real-time floccule weight is not less than the standard flocculation weight, and the central control unit does not adjust the running state of the sewage purification device.
6. The municipal sewage purification apparatus according to claim 5, wherein the central control unit is capable of adjusting the preset treatment water level height Hy of the treatment tank to Hys, hys = Hj x (Ms/Ma), where Ma is the standard flocculation weight and Ma = (Me + Mr)/2, according to the real-time floc weight Ms, when the real-time floc weight is determined to be lower than the standardized flocculation weight, and the central control unit adjusts the initial flocculant dosage Lc to Lcs, lcs = Hys x (Lj/Hj) according to the preset water level height Hys; the central control unit controls the first pump machine to carry out secondary water delivery to the treatment tank, the central control unit repeatedly sets the treatment water level height of the treatment tank to Hys ' according to the real-time metal ion concentration of the sewage to be treated, hys ' = Hys x (Cb/Cs), controls the first pump machine to discharge the sewage to be treated to Hys ' into the treatment tank, puts the flocculating agent according to the actual input quantity Lj ' of the secondary flocculating agent obtained by the central control unit, and then carries out stirring, standing, separation, collection and drainage, and the central control unit compares the secondary real-time floccule weight Ms ' detected by the weight detector with the primary real-time floccule weight Ms,
when Ms 'is more than Ms, the central control unit judges that the weight of the secondary real-time floccules is higher than that of the primary real-time floccules, and the central control unit compares the weight Ms' of the secondary real-time floccules with the standard flocculation weight Mr to judge whether to continue to adjust or not;
when Ms' is less than or equal to Ms, the central control unit judges that the weight of the secondary real-time floccules is not higher than that of the primary real-time floccules, the central control unit keeps the height of the primary preset water level unchanged, and the adding amount of the flocculating agent is adjusted.
7. The municipal sewage purification apparatus according to claim 6, wherein the central control unit is capable of comparing the secondary real-time floc weight Ms' with the standardized flocculation weight Mr when it is determined that the secondary real-time floc weight is higher than the primary real-time floc weight,
when Ms' is more than or equal to Mr, the central control unit judges that the weight of the secondary real-time floccule is not less than the flocculation weight up to the standard, and the central control unit does not adjust the operation state of the sewage purification device;
when Ms' is less than Mr, the central control unit judges that the secondary real-time floccule weight is lower than the standard flocculation weight, the central control unit repeatedly adjusts the preset treatment water level height and the initial input amount of the flocculating agent in the treatment tank according to the real-time floccule weight, and performs calculation and judgment until the calculated real-time floccule weight is not lower than the standard flocculation weight, and the central control unit judges that the adjustment is finished.
8. The municipal sewage purification apparatus according to claim 7, wherein the central control unit is capable of adjusting the initial input amount Lc of the flocculant to Lct, lct = Lj x (Ma/Ms) and controlling the first pump to deliver water to the treatment tank three times when it is determined that the secondary real-time floc weight is not higher than the primary real-time floc weight, the central control unit repeatedly sets the treatment water level height of the treatment tank to Hy ', hy' = Hy x (Cb/Cs) according to the real-time metal ion concentration of the sewage to be treated, controls the first pump to discharge the sewage to Hy 'into the treatment tank, puts the flocculant at the actual input amount Lj' of the flocculant obtained by the central control unit three times, and compares the actual input amount Ms "of the floc detected by the weight detector with the standardized flocculation weight Mr after stirring, standing, separation, collection and drainage,
when Ms' is more than Mr, the central control unit judges that the weight of the three-time real-time floccules is higher than the flocculation weight up to the standard, and the central control unit does not adjust the running state of the sewage purification device;
when Ms is less than or equal to Mr, the central control unit judges that the three-time real-time floccule weight is not higher than the flocculation weight up to the standard, and the central control unit controls the urban sewage purification device to stop running for shutdown inspection.
9. The municipal sewage purification apparatus according to claim 1, wherein the treatment tank comprises,
the electric vortex stirrer is arranged inside the treatment box and is used for stirring the sewage to be treated in the treatment box;
the water level height meter is arranged on the side wall inside the treatment tank and is used for detecting the real-time water level height of the sewage to be treated in the treatment tank;
the main water outlet pipeline is arranged on one side of the treatment tank and used for discharging sewage which is treated in the treatment tank;
and the lifting scraper is arranged at the top end inside the treatment box and is used for scraping the grease foam on the surface layer of the sewage inside the treatment box to a foam collecting tank from a discharge and floating outlet on the side wall of the treatment box.
10. The municipal sewage purification apparatus according to claim 9, wherein said separation means comprises,
a mixing collector connected to the bottom of the treatment tank for collecting the mixture of water and floe from the bottom of the treatment tank;
the separation tank is arranged at the bottom of the mixing collector and is used for separating water and floccules in the mixture, an auxiliary water outlet pipeline is arranged on the side wall of the separation tank, and a second pump is arranged on the auxiliary water outlet pipeline and is used for discharging water separated by the separation tank into the main water outlet pipeline;
and the floccule collector is arranged at the bottom of the separation box and is used for collecting the floccule separated by the separation box.
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