CN103011517B - Device and control method for safety guarantee of municipal sewage recycling - Google Patents
Device and control method for safety guarantee of municipal sewage recycling Download PDFInfo
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- CN103011517B CN103011517B CN2012105630889A CN201210563088A CN103011517B CN 103011517 B CN103011517 B CN 103011517B CN 2012105630889 A CN2012105630889 A CN 2012105630889A CN 201210563088 A CN201210563088 A CN 201210563088A CN 103011517 B CN103011517 B CN 103011517B
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- 238000004064 recycling Methods 0.000 title abstract 4
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Abstract
The invention discloses a device and a control method for safety guarantee of municipal sewage recycling. The device is provided with an ozone contact pool, a biological activated carbon filter pool and a clean water pool that are arranged and communicated front and rear in sequence, wherein the ozone contact pool is communicated with secondary treatment effluent; a granular activated carbon filling is arranged in the biological activated carbon filter pool; and a water inlet pipe is communicated with a water outlet pipe of the ozone contact pool. The device is provided with a fan, a back flushing gas and water pipeline communicated with the clean water pool, and a controller. The control method comprises the steps that 1), operating allowable value ranges of various measurement components and operating conditions of various equipment are set on the controller, and 2), the device for the safety guarantee of the municipal sewage recycling is started to operate. The device and the control method are applicable to the safety guarantee of municipal sewage recycling, and the device is perfect in structure, flexible to control, high in automation degree, and high in water treatment quality and water treatment efficiency.
Description
Technical field
The invention belongs to a kind of technical field of sewage, specifically the regeneration effluent treatment technology, a kind of for reuse of wastewater, degree of depth decontamination detoxification, the device of safety control and technique.
Background technology
Urban sewage reutilization is one of effective way of alleviating shortage of water resources, municipal effluent after purifying treatment can be used as the multiple uses such as reclaimed water, municipal administration greening water, process water, landscape ecological moisturizing and field irrigation, the fresh water amount of alternative equivalent.A stable new water source had both been opened up in the regeneration of sewage, can reduce the carrying capacity of environment that discharge of wastewater causes again, to alleviating water scarcity and improving water surrounding, important meaning was arranged.Yet to be murder by poisoning pollutent COD, nutritive salt and pathogenic micro-organism residual in reuse water formed potential harm by different reuse approach to the ecological safety of biology and receiving water body to secondary effluent in municipal sewage plant.Therefore, the economic development problem of municipal effluent regeneration is the urban sewage reutilization problem demanding prompt solution.
According to relevant data, show: still lingering section organism and pathogenic micro-organism in water after regeneration effluent.These organism and pathogenic micro-organism, in the application of reuse water, bring serious destruction can for ecotope and HUMAN HEALTH, bring potential risks.The urban sewage reutilization safeguards technique is exactly mainly to remove pollutent and the pathogenic micro-organism that can not remove in the front-end processing process or can not remove fully.Due to the purpose difference of reuse of wastewater, the degree for the treatment of of sewage is also required to difference, need to select different treatment process for concrete reuse purpose.
Regeneration effluent advanced treatment process purpose is remove suspended substance, turbidity and kill the water-borne infection germ, the clearance of raising to the nutritive substances such as organism, turbidity, phosphorus and nitrogen and other dissolved matters, improve effluent quality, but be difficult to thoroughly remove nutritive salt and suspended substance, poisonous and harmful micropollutant and colourity etc. in water, be difficult to guarantee that effluent quality meets the requirement of surface water body.Therefore, need to do further improvement to present processing skill, to improve the effect of advanced treatment of wastewater, further improve the water quality of reuse water, and predigested running technique, reduce running cost, meet better the needs of society.
Summary of the invention
the objective of the invention is in order to solve the problems of the technologies described above, a kind of device and control method of urban sewage reutilization safety control are proposed, this device and process using ozone oxidation, activated carbon filtration, hypochlorous acid ammonia sterilization process, by the ozone oxidation partial organic substances of degrading, remove in reuse water micro-noxious pollutant and kill the part pathogenic micro-organism, by activated carbon filtration, not only can further remove turbidity again, while absorption degradation partial organic substances, follow-up chlorine disinfectant is processed, not only can oxidation kill pathogenic micro-organism remaining in reuse water, and can prevent resurrection and the breeding of follow-up storage transmission & distribution process pathogenic micro-organism.This safety convenience instrument and technical process are simple, Disposal quality is high, reduced investment, occupation of land are little.
The objective of the invention is to be achieved through the following technical solutions:
The device of urban sewage reutilization safety control is characterized in that: be provided with sequentially ozone contact tank, biological activity carbon filter and the clean water basin of in tandem and connection; Described ozone contact tank is communicated with the secondary treatment yielding water of waste disposal plant by the pipeline with controlled variable frequency pump and online liquid meter, the ozone contact tank bottom is provided with the ozone distribution device, this ozone distribution device is communicated with ozonizer by the pipeline with online gas meter, and ozone is through distribution device and water inlet countercurrent flow; In described biological activity carbon filter, be provided with particle diameter 8-16 purpose seed activity carbon filling material, water inlet pipe is communicated with the ozone contact tank rising pipe, in the biological activity carbon filter, water (flow) direction is upflowing from the bottom to top, and being provided with the backwashing water pipeline that is communicated with clean water basin, this backwashing water pipeline is provided with controlled backwashing pump; The biological activity carbon filter also is communicated with the blower fan with controllable frequency converter, and this blower fan is that air aeration and Air Reverse rinse blower fan; In the biological activity carbon filter, influent side is provided with pressure tester, the rising pipe of biological activity carbon filter is provided with online dissolved oxygen concentration meter, this rising pipe is communicated with the water inlet pipe of described clean water basin, the water inlet pipe of these clean water basin is communicated with the medicament storage tank by being with controlled frequency conversion to add pump, and the rising pipe of clean water basin is provided with online chlorine residue meter; Be provided with in addition controller, this controller and above-mentioned controlled variable frequency pump, controlled backwashing pump, controlled frequency conversion add the controllable frequency converter of pump, online liquid meter, online gas meter, ozonizer, online dissolved oxygen concentration meter, online chlorine residue meter and blower fan and carry out signal and control linkage.
The control method of the device of above-mentioned urban sewage reutilization safety control, its feature comprises the following steps:
That 1) on controller, sets each metering unit carries out the permissible value scope:
(1) set the permissible value scope of the online liquid meter on the ozone contact tank water inlet pipe: this permissible value is processed the residence time of water in time that water stops and biological activity carbon filter and concrete pond body bulk is determined according in ozone contact tank, processing, and the time that in ozone contact tank, water stops is 10-20 minute; The time that in the biological activity carbon filter, water stops is 60-120 minute, according to this two residence time, determines the allowed band of the unit time feed water flow value of ozone contact tank, namely the permissible value scope of the online liquid meter on the ozone contact tank water inlet pipe;
(2) set the span of the online dissolved oxygen concentration meter on biological activity carbon filter rising pipe: be 2-5mg/L;
(3) set the online gas meter span on the ozonizer air-supply duct: guaranteeing according to the ozone contact tank volume, to set the permissible value scope of online gas meter under the constant condition that adds concentration 3-8mg/L;
(4) the permissible value scope of the online chlorine residue meter on the rising pipe of setting clean water basin: be 0.3-0.5mg/L;
(5) set the pressure allowed band of influent side in the biological activity carbon filter: 0.03-0.06MPa;
2) open the device operation of urban sewage reutilization safety control;
(1) flooding velocity of ozone contact tank is controlled: when the online liquid flow rate evaluation on the ozone contact tank water inlet pipe during higher than set(ting)value, controller is turned down the flooding quantity of the first variable frequency pump, otherwise when the liquid flow rate evaluation was lower than set(ting)value online, controller was heightened the flooding quantity of the first variable frequency pump;
(2) control of ozonizer ozone supply contact tank ozone amount: when online gas flow evaluation during lower than set(ting)value, controller is heightened the air demand of ozonizer, otherwise during higher than set(ting)value, controller is turned down the air demand of ozonizer when online gas flow evaluation;
(3) control of biological activity carbon filter aeration rate: when on biological activity carbon filter rising pipe, online dissolved oxygen concentration evaluation is lower than set(ting)value, controller is controlled blower fan and is strengthened air demand, otherwise when the dissolved oxygen concentration evaluation was higher than set(ting)value online, controller was controlled blower fan and is reduced air demand;
(4) control of biological activity carbon filter gas, water backwashing: control gas, water backwashing according to the force value of the pressure tester in biological carbon filter tank, after surpassing set(ting)value, force value starts backwashing procedures, backwashing procedures controls the gas punching of blower fan and the water punching of controlled backwashing pump hockets, each each 5 minutes kinds;
(5) control of the chemical feeding quantity of clean water basin; The frequency conversion of controlling dosing according to the residual chlorine concentration value of the online chlorine residue meter on the clean water basin rising pipe adds the dosage of pump, and when concentration is high, increases and add dose, otherwise, when concentration is low, reduces and add dose, remain the water outlet residual chlorine concentration at 0.3-0.5mg/L.
The operation mechanism of the device of the urban sewage reutilization safety control of invention: secondary treatment yielding water enters ozone contact tank, to poisonous micro-content organism in reuse water---estrogens, antibiotics carry out oxidative degradation, simultaneously solubilised state is difficult to the biodegradable look organism that causes and carries out the ozone oxidation decolored degradation, when improving in water biodegradability of organic matter, further improve effluent color dilution; In the ozone oxidation process, can kill the part pathogenic micro-organism; To through ozone contact tank, processing and be delivered to the biological activity carbon filter by pipeline;
The biological activity carbon filter, carry out further removing organic processing on the basis of ozone oxidation; Organism in secondary treatment yielding water has increased biodegradability after ozone oxidation, in biological activated carbon filter, be adsorbed degraded; Because organic content in reuse water is lower, the activated carbon surface biofilm development is slower, the method of biological activity carbon reactor start-up adopts Continuous Flow to cultivate, and then the Continuous Flow that increases gradually of loading is intake or increases gradually the method that flow velocity carries out the Continuous Flow cultivation; Bioactive carbon filter back washing process should adopt the operation scheme of precipitation → gas punching → air water punching → water punching; Backwash process is as follows: precipitation: reduce water level to more than filtering layer 10cm; Gas punching: air blasting intensity 50～70m/h, time 2-5min; The air water punching: air blasting intensity 50～70m/h, water rush intensity 25～40m/h, time 5-10min; The water punching: water rushes intensity 25～40m/h, time 5-10min.
Chlorhexidine-containing disinfectant can adopt clorox, and efficient content is not less than 10%.The pipeline that adopts surge pump to carry out medicament adds, and enters clean water basin after qualified after testing;
Beneficial effect of the present invention: can take full advantage of remaining carbon source in secondary treatment yielding water, ozone oxidation is removed and is poisoned organism, improves organic biodegradability in water, can effectively kill the part pathogenic micro-organism again simultaneously.By biologic active carbon filtration, can further remove in water organism and can effectively remove the ozone degradation by product and reduce delivery turbidity, to guarantee the effect of processing.Follow-up chlorine disinfectant can be controlled pathogenic micro-organism well, and residual chlorine residue also can suppress the breeding of subsequent process microorganism.Therefore, the present invention has structure improvement, technical process is simple, Disposal quality good, efficiency is high, reduced investment, occupation of land is little, particularly automatic controlling level is established, control flexibly accurately, simple to operate, running cost is hanged down plurality of advantages, and important application prospect is arranged on the urban sewage reutilization safety control.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
The profile of the utility model product and layout are not subjected to the restriction of this figure, and only profile and layout change the protection domain that also belongs to this patent.
Embodiment
Below in conjunction with embodiment and accompanying drawing, further illustrate the present invention: embodiment: referring to accompanying drawing, the device of urban sewage reutilization safety control, be provided with sequentially ozone contact tank 4, biological activity carbon filter 9 and the clean water basin 12 of in tandem and connection; Described ozone contact tank is communicated with the secondary treatment yielding water 1 of waste disposal plant by the pipeline with controlled variable frequency pump 2 and online liquid meter 3, the ozone contact tank bottom is provided with the ozone distribution device, this ozone distribution device is communicated with ozonizer 7 by the pipeline with online gas meter 6, and ozone is through distribution device and water inlet countercurrent flow; In described biological activity carbon filter, be provided with particle diameter 8-16 purpose seed activity carbon filling material, water inlet pipe is communicated with the ozone contact tank rising pipe, in the biological activity carbon filter, water (flow) direction is upflowing from the bottom to top, and being provided with the backwashing water pipeline that is communicated with clean water basin, this backwashing water pipeline is provided with controlled backwashing pump 10; The biological activity carbon filter also is communicated with the blower fan 17 with controllable frequency converter 18, and this blower fan is that air aeration and Air Reverse rinse blower fan; In the biological activity carbon filter, influent side is provided with pressure tester, the rising pipe of biological activity carbon filter is provided with online dissolved oxygen concentration meter 11, this rising pipe is communicated with the water inlet pipe of described clean water basin, the water inlet pipe of these clean water basin is communicated with medicament storage tank 15 by being with controlled frequency conversion to add pump 16, and the rising pipe of clean water basin is provided with online chlorine residue meter 13; Be provided with in addition controller 19, this controller and above-mentioned controlled variable frequency pump 2, controlled backwashing pump 10, controlled frequency conversion add the controllable frequency converter 18 of pump 16, online liquid meter 3, online gas meter 6, ozonizer 7, online dissolved oxygen concentration meter 11, online chlorine residue meter 13 and blower fan and carry out signal and control linkage.
The control method of the device of urban sewage reutilization safety control comprises the following steps:
That 1) on controller, sets each metering unit carries out the permissible value scope:
(1) set the permissible value scope of the online liquid meter on the ozone contact tank water inlet pipe: this permissible value is processed the residence time of water in time that water stops and biological activity carbon filter and concrete pond body bulk is determined according in ozone contact tank, processing, and the time that in ozone contact tank, water stops is 15 minutes; The time that in the biological activity carbon filter, water stops is 100 minutes, according to this two residence time, determines the allowed band of the unit time feed water flow value of ozone contact tank, namely the permissible value scope of the online liquid meter on the ozone contact tank water inlet pipe;
(2) set the span of the online dissolved oxygen concentration meter on biological activity carbon filter rising pipe: be 3mg/L;
(3) set the online gas meter span on the ozonizer air-supply duct: guaranteeing according to the ozone contact tank volume, to set the permissible value scope of online gas meter under the constant condition that adds concentration 3-8mg/L;
(4) the permissible value scope of the online chlorine residue meter on the rising pipe of setting clean water basin: be 0.5mg/L;
(5) set the pressure allowed band of influent side in the biological activity carbon filter: 0.06MPa;
2) open the device operation of urban sewage reutilization safety control;
(1) flooding velocity of ozone contact tank is controlled: when the online liquid flow rate evaluation on the ozone contact tank water inlet pipe during higher than set(ting)value, controller is turned down the flooding quantity of the first variable frequency pump, otherwise when the liquid flow rate evaluation was lower than set(ting)value online, controller was heightened the flooding quantity of the first variable frequency pump;
(2) control of ozonizer ozone supply contact tank ozone amount: when online gas flow evaluation during lower than set(ting)value, controller is heightened the air demand of ozonizer, otherwise during higher than set(ting)value, controller is turned down the air demand of ozonizer when online gas flow evaluation;
(3) control of biological activity carbon filter aeration rate: when on biological activity carbon filter rising pipe, online dissolved oxygen concentration evaluation is lower than set(ting)value, controller is controlled blower fan and is strengthened air demand, otherwise when the dissolved oxygen concentration evaluation was higher than set(ting)value online, controller was controlled blower fan and is reduced air demand;
(4) control of biological activity carbon filter gas, water backwashing: control gas, water backwashing according to the force value of the pressure tester in biological carbon filter tank, after surpassing set(ting)value 0.06MPa, force value starts backwashing procedures, backwashing procedures controls the gas punching of blower fan and the water punching of controlled backwashing pump hockets, each each 5 minutes kinds;
(5) control of the chemical feeding quantity of clean water basin; The frequency conversion of controlling dosing according to the residual chlorine concentration value of the online chlorine residue meter on the clean water basin rising pipe adds the dosage of pump, and when concentration is high, increases and add dose, otherwise, when concentration is low, reduces and add dose, remain the water outlet residual chlorine concentration at 0.3-0.5mg/L.
In the present embodiment, take domestic certain sewage disposal plant effluent, the index contrast before and after the art breading of the present embodiment:
Detected result shows, after device of the present invention, reach following effect: the COD clearance reaches more than 37%.Delivery turbidity can keep<1NTU, colourity<15 degree, and the water outlet intestinal bacteria of this device are stable to be reached<3/L.This technique is simple, and the investment working cost is few, saves material consumption, and environmental influence is little, controls flexibly, and easy and simple to handle, level of automation is high, has greatly improved processing load and the removal effect of advanced treatment of wastewater equipment.
Finally it should be noted that: for those of ordinary skill in the field, on the basis of above-mentioned principle, can also make other changes in different forms.These variations or change still are among the protection domain of this patent.
Claims (2)
1. the device of a urban sewage reutilization safety control is characterized in that: be provided with sequentially ozone contact tank (4), biological activity carbon filter (9) and the clean water basin (12) of in tandem and connection; Described ozone contact tank is communicated with the secondary treatment yielding water (1) of waste disposal plant by the pipeline with controlled variable frequency pump (2) and online liquid meter (3), the ozone contact tank bottom is provided with the ozone distribution device, this ozone distribution device is communicated with ozonizer (7) by the pipeline with online gas meter (6), and ozone is through distribution device and water inlet countercurrent flow; In described biological activity carbon filter, be provided with particle diameter 8-16 purpose seed activity carbon filling material, water inlet pipe is communicated with the ozone contact tank rising pipe, in the biological activity carbon filter, water (flow) direction is upflowing from the bottom to top, and being provided with the backwashing water pipeline that is communicated with clean water basin, this backwashing water pipeline is provided with controlled backwashing pump (10); The biological activity carbon filter also is communicated with the blower fan (17) of band controllable frequency converter (18), and this blower fan is that air aeration and Air Reverse rinse blower fan; In the biological activity carbon filter, influent side is provided with pressure tester, the rising pipe of biological activity carbon filter is provided with online dissolved oxygen concentration meter (11), this rising pipe is communicated with the water inlet pipe of described clean water basin, the water inlet pipe of these clean water basin is communicated with medicament storage tank (15) by being with controlled frequency conversion to add pump (16), and the rising pipe of clean water basin is provided with online chlorine residue meter (13); Be provided with in addition controller (19), this controller and above-mentioned controlled variable frequency pump (2), controlled backwashing pump (10), controlled frequency conversion add the controllable frequency converter (18) of pump (16), online liquid meter (3), online gas meter (6), ozonizer (7), online dissolved oxygen concentration meter (11), online chlorine residue meter (13) and blower fan and carry out signal and control linkage.
2. the control method of the device of urban sewage reutilization safety control according to claim 1, its feature comprises the following steps:
That 1) on controller, sets each metering unit carries out the permissible value scope:
(1) set the permissible value scope of the online liquid meter on the ozone contact tank water inlet pipe: this permissible value is processed the residence time of water in time that water stops and biological activity carbon filter and concrete pond body bulk is determined according in ozone contact tank, processing, and the time that in ozone contact tank, water stops is 10-20 minute; The time that in the biological activity carbon filter, water stops is 60-120 minute, according to this two residence time, determines the allowed band of the unit time feed water flow value of ozone contact tank, namely the permissible value scope of the online liquid meter on the ozone contact tank water inlet pipe;
(2) set the span of the online dissolved oxygen concentration meter on biological activity carbon filter rising pipe: be 2-5mg/L;
(3) set the online gas meter span on the ozonizer air-supply duct: guaranteeing according to the ozone contact tank volume, to set the permissible value scope of online gas meter under the constant condition that adds concentration 3-8mg/L;
(4) the permissible value scope of the online chlorine residue meter on the rising pipe of setting clean water basin: be 0.3-0.5mg/L;
(5) set the pressure allowed band of influent side in the biological activity carbon filter: 0.03-0.06MPa:
2) open the device operation of urban sewage reutilization safety control;
(1) flooding velocity of ozone contact tank is controlled: when the online liquid flow rate evaluation on the ozone contact tank water inlet pipe during higher than set(ting)value, controller is turned down the flooding quantity of the first variable frequency pump, otherwise when the liquid flow rate evaluation was lower than set(ting)value online, controller was heightened the flooding quantity of the first variable frequency pump;
(2) control of ozonizer ozone supply contact tank ozone amount: when online gas flow evaluation during lower than set(ting)value, controller is heightened the air demand of ozonizer, otherwise during higher than set(ting)value, controller is turned down the air demand of ozonizer when online gas flow evaluation;
(3) control of biological activity carbon filter aeration rate: when on biological activity carbon filter rising pipe, online dissolved oxygen concentration evaluation is lower than set(ting)value, controller is controlled blower fan and is strengthened air demand, otherwise when the dissolved oxygen concentration evaluation was higher than set(ting)value online, controller was controlled blower fan and is reduced air demand;
(4) control of biological activity carbon filter gas, water backwashing: control gas, water backwashing according to the force value of the pressure tester in biological carbon filter tank, after surpassing set(ting)value, force value starts backwashing procedures, backwashing procedures controls the gas punching of blower fan and the water punching of controlled backwashing pump hockets, each each 5 minutes kinds;
(5) control of the chemical feeding quantity of clean water basin; The frequency conversion of controlling dosing according to the residual chlorine concentration value of the online chlorine residue meter on the clean water basin rising pipe adds the dosage of pump, and when concentration is high, increases and add dose, otherwise, when concentration is low, reduces and add dose, remain the water outlet residual chlorine concentration at 0.3-0.5mg/L.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105630889A CN103011517B (en) | 2012-12-24 | 2012-12-24 | Device and control method for safety guarantee of municipal sewage recycling |
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| CN2012105630889A CN103011517B (en) | 2012-12-24 | 2012-12-24 | Device and control method for safety guarantee of municipal sewage recycling |
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| CN103011517A CN103011517A (en) | 2013-04-03 |
| CN103011517B true CN103011517B (en) | 2013-11-20 |
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