CN212222557U - Mobile oxidation ditch foam collecting and dewatering system - Google Patents
Mobile oxidation ditch foam collecting and dewatering system Download PDFInfo
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- CN212222557U CN212222557U CN202022001658.8U CN202022001658U CN212222557U CN 212222557 U CN212222557 U CN 212222557U CN 202022001658 U CN202022001658 U CN 202022001658U CN 212222557 U CN212222557 U CN 212222557U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model discloses a dewatering system is collected to portable oxidation ditch foam. The system comprises a container, a foam buffer pool, a dosing device, a dehydration device and an electrical system; the foam buffer pool is connected with a feed inlet of the dehydration device through a foam discharge pipeline; the main liquid medicine storage tank is communicated with a pipeline between the foam discharge port and the feed inlet; the liquid outlet of the dewatering device is connected with one end of a drainage pipe; the sludge outlet is connected with one end of a sludge conveying pipeline; the medicine supply pump and the dehydration device are electrically connected with the electrical system, the dehydration device can be controlled to work through the electrical system, and the lifting pump of the dehydration device pumps and lifts foam and liquid medicine into the dehydration device. The utility model discloses can realize that the automatic extraction of foam in the oxidation ditch becomes mud with handling, final dehydration, reduce artifical intensity of labour and medicament cost by a wide margin to effectively improved oxidation ditch, two heavy pond pool faces and delivery port impressions, improved the sewage treatment effect.
Description
Technical Field
The utility model relates to a sewage treatment field, concretely relates to dewatering system is collected to portable oxidation ditch foam.
Background
The existing urban domestic sewage treatment plant mostly adopts a surface aeration oxidation ditch process, and the low temperature generally has the condition of sludge expansion to a certain degree for running for many years in winter, so that the surface of an oxidation ditch pool has more foams. A large amount of foam in the oxidation ditch is smashed by an aerator or is dispersed manually, and then is carried into a secondary sedimentation tank and discharged water by sludge-water mixed liquid, so that the quality of the discharged water and the surface reoxygenation are influenced, and the river surface appearance conditions of the secondary sedimentation tank and a water outlet are poor.
The generation of foam is a complex physicochemical and biological process, is a biological system consisting of bubbles, sewage and microorganisms, and has the characteristics of high viscosity, stable structure, yellow brown or yellow white appearance and the like. Studies have shown that the proliferation of filamentous bacteria is a direct cause of the production of biofoam. The widely recognized genera associated with biofoam are mainly actinomycetes (generally comprising Nocardia amarne, Nocardia pinesis, Rhodococcus sp) and filamentous fungi (generally comprising Microthrix parvicella, EikelbMm type 0675, EikelbMm type 0092), the most common of which are Nocardia (Nocardia amarne) and microfilaria (Microthrix parvicella). Most filamentous microorganisms are filamentous or branched and are easy to form a network under the condition of mass propagation, and lipid substances are contained in the filamentous microorganisms, the density of the lipid substances is obviously lower than that of water, and the lipid substances are easy to float. Under the aeration condition, the air flotation effect generated by aeration bubbles is often the main power for forming foam, and the microbial granules are suspended on the water surface by utilizing the air flotation effect of the bubbles. When oil, lipid materials and lipid-containing microorganisms exist in water, the foaming phenomenon is more easily generated, once the foam is formed, the biological retention time of the foam layer is independent of the sludge retention time in the aeration tank, and stable and durable foam is easily formed. Especially in winter, most of the grease has low solubility at low temperature, and under the action of aeration, fine grease particles are suspended on the water surface to provide a carbon source for filamentous microorganisms, so that the filamentous microorganisms become dominant strains, namely the probability of generating biological foams in winter by the microorganisms is higher than that in summer. The factors influencing the biological foam at home and abroad mainly focus on the aspects of temperature, dissolved oxygen, pH, sludge age, sludge load, sewage substrate types, treatment process and the like.
The probability of generating biological foam by the oxidation ditch process is far higher than that of other processes such as AAO and the like, and the main reasons are as follows: firstly, the oxidation ditch process generally adopts mechanical aeration (namely surface aeration), the mechanical aeration oxygenation efficiency is lower, the surface dissolved oxygen is higher, the pool bottom dissolved oxygen is lower, the growth of zoogloea is inhibited under the condition of low dissolved oxygen, filamentous microorganisms can utilize a small amount of dissolved oxygen to proliferate, and finally become dominant strains, and anaerobic sludge can also float upwards under the anoxic environment. Secondly, the ratio of the oxidation sludge to the micro-organism is generally controlled to be 0.03-0.05 kgBOD/kgMLSS.d, the sludge load is low, and under the condition of low sludge load, filamentous microorganisms with large surface area can multiply greatly and easily cause biological foam. And thirdly, designing the oxidation ditch to have the sludge age of 5-15 days, wherein the sludge age is longer, and the longer the sludge age is, the more biological foams are easily caused. Because the mechanism and the influencing factors of the foam generation by the activated sludge method are complex, the existing control measures can not effectively solve the biological foam phenomenon. Although part of the biological foam can be solved by a chemical agent mode, the production and operation cost is increased to a certain extent, and the biochemical system can be influenced due to poor control of the adding amount of the agent, so that the effluent quality is finally influenced.
In the actual operation process of the sewage treatment plant with the surface aeration oxidation ditch process at low temperature in winter, the problems of sludge expansion and large amount of foam generation are not fundamentally solved. The method generally adopted at present is a physical method, mainly adopts manual salvage and reclaimed water impact, has large manual investment and unsatisfactory effect, easily causes adverse effects on the cleanliness of the pond surface and the effluent appearance of the sedimentation pond, and does not meet the requirement of fine management. In severe cases, biological foam can be accumulated to cover the whole pool surface, the oxygenation efficiency of the aeration system is reduced, the operation is seriously influenced, and the risk of overproof effluent quality is increased. Meanwhile, the biological foam is dispersed by manual salvage and high-pressure water washing, the foam can only be dispersed by the high-pressure water washing, the foam can be gathered together again quickly, and the foam phenomenon cannot be eliminated fundamentally. 4-6 workers are required to salvage, disperse and add defoaming agent (the duration of the effect of the defoaming agent is about 2 hours) every day in winter, and about 20 ten thousand yuan is added for a 3 ten thousand ton-scale factory to remove the foam in a cumulative way every year.
In addition, according to the sewage treatment experience of many years, the biological foam is mainly concentrated at low temperature (12-3 months) in winter, and the biological foam generated in the rest time is relatively less (except for water impact), namely the service life of the device is about 4 months in one year. If a conventional foam treatment device is arranged, more space is needed for some small sewage treatment plants, and the device is easy to idle, so that the cost of sewage treatment is increased.
Therefore, a system for realizing harmless treatment of biological foams needs to be designed, which mainly aims at an oxidation ditch process which is easy to generate biological foams and achieves the purposes of efficiently treating foams generated by the oxidation ditch process and reducing the cost of sewage treatment.
SUMMERY OF THE UTILITY MODEL
The aforesaid that exists to prior art is not enough, the utility model discloses an aim at solves and mainly adopts the manual work to clear away the foam that gets rid of the oxidation ditch production among the prior art, and work load is big, the problem that work efficiency is low and treatment cost is high, provide a dewatering system is collected to portable oxidation ditch foam, can realize the automatic extraction and the processing of foam in the oxidation ditch, finally dewater into mud, realize clearing away of foam in the oxidation ditch, not only reduce artifical intensity of labour and medicament cost by a wide margin, and effectively improved the oxidation ditch, two heavy pond pool faces and delivery port are looked and are felt, improve the sewage treatment effect.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a mobile oxidation ditch foam collecting and dewatering system comprises a container, a foam buffer pool, a dosing device, a dewatering device and an electrical system, wherein the foam buffer pool, the dosing device, the dewatering device and the electrical system are arranged in the container; wherein the content of the first and second substances,
the lower part of the foam buffer pool is provided with a foam outlet;
the dosing device comprises a main liquid medicine storage tank, and the main liquid medicine storage tank is provided with a main liquid medicine output pipe;
the dehydration device is provided with a feed inlet, a liquid outlet and a sludge outlet, and the dehydration device is provided with a lift pump, and the inlet of the lift pump forms the feed inlet;
a foam discharge port of the foam buffer pool is connected with a feed port of the dewatering device through a foam discharge pipeline, and a foam control valve is arranged on one side, close to the foam buffer pool, of the foam discharge pipeline; one end of the main liquid medicine output pipe is connected with the main liquid medicine storage tank through a liquid medicine supply pump, the other end of the main liquid medicine output pipe is communicated with a pipeline between the foam discharge port and the feed port, and a main liquid medicine control valve is arranged on one side, close to the main liquid medicine tank, of the main liquid medicine output pipe; the liquid outlet of the dewatering device is connected with one end of a drain pipe, the other end of the drain pipe extends out of the container, and a drain valve is arranged at the position, close to the liquid outlet, of the drain pipe; the sludge outlet is connected with one end of a sludge conveying pipeline, and the other end of the sludge conveying pipeline also extends out of the container;
the medicine supply pump and the dehydration device are electrically connected with the electrical system, the dehydration device can be controlled to work through the electrical system, and the lifting pump of the dehydration device pumps and lifts foam and liquid medicine into the dehydration device.
By arranging the container, and a foam buffer tank, a dosing device, a dewatering device and an electrical system which are arranged in the container, a foam discharge port of the foam buffer tank is connected with a feed port of the dewatering device through a foam discharge pipeline, a main liquid medicine output pipe is connected with a main liquid medicine storage tank through a dosing pump, the other end of the main liquid medicine output pipe is communicated with a pipeline between the foam discharge port and the feed port, a liquid outlet of the dewatering device is connected with one end of a water discharge pipe, and a sludge outlet is connected with one end of a sludge conveying pipeline, so that the liquid medicine in the main liquid medicine storage tank is output into the pipeline between the foam discharge port and the feed port through the main liquid medicine output pipe from the aspect of foam suction, the liquid medicine and the foam are mixed and flocculated firstly and then are lifted into the dewatering device for flocculation precipitation and dewatering treatment under the action of a lifting pump, finally, the foam is processed into water and sludge, so that the post-treatment is facilitated. The system has good collecting and processing effects on the biological foam, greatly reduces the labor intensity and the medicament cost, effectively improves the appearance of the oxidation ditch, the surface of the secondary sedimentation tank and the water outlet, and is economical and practical. In addition, the system is arranged in a container mode, has high liquidity, realizes equipment integration and mobility, and meets the requirement of a sewage plant on the service cycle.
The auxiliary medicine liquid storage tank is provided with an auxiliary medicine liquid output pipe, one end of the auxiliary medicine liquid output pipe is connected with the auxiliary medicine liquid storage tank through a medicine supply pump, and the other end of the auxiliary medicine liquid output pipe is directly connected with the dehydration device; an auxiliary liquid control valve is arranged on one side of the auxiliary liquid output pipe close to the auxiliary liquid tank. Like this, can be with the liquid medicine direct addition dewatering device in the auxiliary liquid medicine storage tank through auxiliary liquid medicine output tube, realize separately adding with the liquid medicine in the main liquid medicine storage tank, avoid producing between two kinds of liquid medicines and interfere, realize better flocculation effect.
Furthermore, overflow pipes are respectively arranged at the upper parts of the foam buffer pool, the main liquid medicine storage tank, the auxiliary liquid medicine storage tank and the dehydration device; one end of the overflow pipe is correspondingly connected with the foam buffer pool, the main liquid medicine storage tank, the auxiliary liquid medicine storage tank and the dehydration device, and the other end of the overflow pipe is connected with the drain pipe; and a foam overflow valve, a main liquid medicine overflow valve, an auxiliary liquid medicine overflow valve and a dehydration device overflow valve are correspondingly arranged on one side of the overflow pipe close to the foam buffer pool, the main liquid medicine storage tank, the auxiliary liquid medicine storage tank and the dehydration device. Like this, can carry out the overflow protection to foam buffer memory pond, main liquid medicine storage jar, auxiliary liquid medicine storage jar and dewatering device, prevent that liquid from spilling over and cause the harm to entire system.
The device further comprises a main dosing pipe and an auxiliary dosing pipe, wherein one end of the main dosing pipe and one end of the auxiliary dosing pipe are correspondingly connected with the upper parts of the main liquid medicine storage tank and the auxiliary liquid medicine storage tank, and the other ends of the main dosing pipe and the auxiliary dosing pipe are connected with the drain pipe; the main medicine adding pipe is provided with a main medicine adding valve at one side close to the main medicine liquid storage tank, and the auxiliary medicine adding pipe is provided with an auxiliary medicine adding valve at one side close to the auxiliary medicine liquid storage tank. Like this, can add the liquid medicine respectively to main liquid medicine storage jar and supplementary liquid medicine storage jar through main medicine pipe and supplementary medicine pipe, avoid artifical the interpolation.
Further, the dehydration device is provided with a reaction tank, and the foam and the liquid medicine are pumped by a lifting pump and lifted into the reaction tank, so that the foam and the liquid medicine can be fully mixed and flocculated in the reaction tank of the dehydration device, and preparation is made for a dehydration link.
Furthermore, a flow meter is respectively arranged on the main liquid medicine output pipe of the main liquid medicine storage tank and the auxiliary liquid medicine output pipe of the auxiliary liquid medicine storage tank. The flow rate conveyed by the main liquid medicine output pipe and the auxiliary liquid medicine output pipe is independently controlled by the flow meter, so that the liquid medicine is more accurately added.
Further, the device also comprises a suction device; the suction device is positioned at the outer side of the container and is provided with a foam suction inlet and a foam output port; and the foam output port is connected with the foam buffer pool through a pipeline. Like this, can avoid the manual work to collect the foam through suction device in can sucking the foam buffer memory pond, not only improve the efficiency of collecting the foam, reduce the cost of manual collection foam moreover.
Furthermore, one side or a plurality of sides of the container are provided with openable and closable box doors. Therefore, the container is convenient to open, the operation and control of the whole system are convenient, and the design is reasonable.
Further, be equipped with the several agitator in foam buffer pool, like this, can stir the foam in the foam buffer pool, stir great foam, can prevent to get into too much air in the foam discharge pipe way, be convenient for follow-up and liquid medicine misce bene.
Compared with the prior art, the utility model has the advantages of as follows:
1. by arranging the container, and a foam buffer tank, a dosing device, a dewatering device and an electrical system which are arranged in the container, a foam discharge port of the foam buffer tank is connected with a feed port of the dewatering device through a foam discharge pipeline, a main liquid medicine output pipe is connected with a main liquid medicine storage tank through a dosing pump, the other end of the main liquid medicine output pipe is communicated with a pipeline between the foam discharge port and the feed port, a liquid outlet of the dewatering device is connected with one end of a water discharge pipe, and a sludge outlet is connected with one end of a sludge conveying pipeline, so that the liquid medicine in the main liquid medicine storage tank is output into the pipeline between the foam discharge port and the feed port through the main liquid medicine output pipe from the aspect of foam suction, the liquid medicine and the foam are mixed and flocculated firstly and then are lifted into the dewatering device for flocculation precipitation and dewatering treatment under the action of a lifting pump, finally, the foam is processed into water and sludge, so that the post-treatment is facilitated.
2. The system has good collecting and processing effects on the biological foam, greatly reduces the labor intensity and the medicament cost, effectively improves the appearance of the oxidation ditch, the surface of the secondary sedimentation tank and the water outlet, and is economical and practical.
3. The system is arranged in a container mode, has strong liquidity, realizes the integration and the movement of equipment, and meets the requirement of a sewage plant on the service cycle.
Drawings
Fig. 1 is a schematic plan view of the movable oxidation ditch foam collecting and dewatering system of the present invention.
Fig. 2 is a schematic connection diagram of the movable oxidation ditch foam collecting and dewatering system of the present invention.
Figure 3 is a graph of the foam pumped in example 1.
FIG. 4 is a diagram showing sludge after dewatering in example 1.
In the figure: the device comprises a container 1, a foam buffer tank 2, a foam control valve 21, a dosing device 3, a main liquid medicine storage tank 31, a main liquid medicine control valve 32, a main dosing valve 33, an auxiliary liquid medicine storage tank 34, an auxiliary liquid medicine control valve 35, an auxiliary dosing valve 36, a medicine supply pump 37, a dehydration device 4, a drain pipe 41, a drain valve 42, a dehydration device overflow valve 43, a reaction tank 44, a sludge outlet 45, a lift pump 46 and a suction device 5.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1 and 2, a mobile oxidation ditch foam collecting and dewatering system comprises a container 1, a foam buffer pool 2 arranged in the container 1, a dosing device 3, a dewatering device 4 and an electrical system. One side or a plurality of sides of the container 1 are provided with openable and closable box doors. Therefore, the container 1 is convenient to open, the operation and control of the whole system are convenient, and the design is reasonable. The lower part of the foam buffer pool 2 is provided with a foam outlet. Be equipped with the several agitator in foam buffer pool 2, like this, can stir the foam in foam buffer pool 2, stir great foam, can prevent to get into too much air in the foam discharge pipe way, be convenient for follow-up and liquid medicine misce bene. The medicine adding device 3 comprises a main liquid medicine storage tank 31, and the main liquid medicine storage tank 31 is provided with a main liquid medicine output pipe. The dewatering device 4 has a feed inlet, a liquid outlet and a sludge outlet 45, and the dewatering device 4 has a lift pump 46, the inlet of which lift pump 46 forms the feed inlet. The foam discharge port of the foam buffer pool 2 is connected with the feed port of the dewatering device 4 through a foam discharge pipeline, and a foam control valve 21 is arranged on one side of the foam discharge pipeline close to the foam buffer pool 2. One end of the main liquid medicine output pipe is connected with the main liquid medicine storage tank 31 through a medicine supply pump 37, the other end of the main liquid medicine output pipe is communicated with a pipeline between the foam discharge port and the feed port, and a main liquid medicine control valve 32 is arranged on one side of the main liquid medicine output pipe, which is close to the main liquid medicine tank. The medicine supply pump 37 and the dehydration device 4 are both electrically connected with the electrical system, the dehydration device 4 can be controlled to work through the electrical system, and the lifting pump 46 of the dehydration device 4 pumps and lifts foam and liquid medicine into the dehydration device 4.
In practice, the dehydration device 4 has a reaction tank 44, and the foam and the liquid medicine are pumped and lifted into the reaction tank 44 by a lift pump 46, so that the foam and the liquid medicine can be sufficiently mixed and flocculated in the reaction tank 44 of the dehydration device 4, and the dehydration device is ready for a dehydration process. The liquid outlet of the dewatering device 4 is connected to one end of a drain pipe 41, the other end of the drain pipe 41 extends out of the container 1, and a drain valve 42 is provided at the drain pipe 41 near the liquid outlet. The sludge outlet 45 is connected to one end of a sludge transfer pipe, the other end of which also extends outside the container 1. The dewatering device 4 is preferably a stack screw dewatering machine. The sludge flocculated in the reaction tank 44 enters a spiral-stacked dehydrator for dehydration treatment, and enters a concentration section, a large amount of flocculated sludge is rapidly separated from a liquid phase in the concentration section, and then the sludge is pushed to a dehydration section. In the dewatering section, the relative movement of the fixed ring and the movable ring and the continuous enhancement of the internal pressure of the filter chamber are utilized, so that the dewatering purpose is achieved, and the filter cake is discharged out of the machine.
In specific implementation, the device further comprises an auxiliary liquid storage tank 34, the auxiliary liquid storage tank 34 is provided with an auxiliary liquid output pipe, one end of the auxiliary liquid output pipe is connected with the auxiliary liquid storage tank 34 through a medicine supply pump 37, and the other end of the auxiliary liquid output pipe is directly connected with the dehydration device 4. An auxiliary liquid control valve 35 is arranged on one side of the auxiliary liquid output pipe close to the auxiliary liquid tank. Like this, can be with the liquid medicine direct addition to dewatering device 4 in the auxiliary liquid medicine storage jar 34 through auxiliary liquid medicine output tube, realize separately adding with the liquid medicine in the main liquid medicine storage jar 31, avoid producing between two kinds of liquid medicines and interfere, realize better flocculation effect.
A flow meter is respectively arranged on the main liquid medicine output pipe of the main liquid medicine storage tank 31 and the auxiliary liquid medicine output pipe of the auxiliary liquid medicine storage tank 34. The flow rate conveyed by the main liquid medicine output pipe and the auxiliary liquid medicine output pipe is independently controlled by the flow meter, so that the liquid medicine is more accurately added.
In specific implementation, overflow pipes are respectively arranged at the upper parts of the foam buffer tank 2, the main liquid medicine storage tank 31, the auxiliary liquid medicine storage tank 34 and the dehydration device 4. One end of the overflow pipe is correspondingly connected with the foam buffer pool 2, the main liquid medicine storage tank 31, the auxiliary liquid medicine storage tank 34 and the dehydration device 4, and the other end of the overflow pipe is connected with the drain pipe 41; a foam overflow valve, a main liquid medicine overflow valve, an auxiliary liquid medicine overflow valve and an overflow valve of the dehydration device 4 are correspondingly arranged at one side of the overflow pipe close to the foam buffer pool 2, the main liquid medicine storage tank 31, the auxiliary liquid medicine storage tank 34 and the dehydration device 4. Thus, the foam buffer tank 2, the main drug solution storage tank 31, the auxiliary drug solution storage tank 34 and the dehydration device 4 can be protected from overflowing, and the liquid can be prevented from overflowing to damage the whole system.
A suction device 5 is also included. The suction device 5 is located outside the container 1 and has a foam suction inlet and a foam discharge outlet. And the foam output port is connected with the foam buffer pool 2 through a pipeline. Like this, can pump the foam to foam buffer pool 2 through suction device 5 in, avoid the manual work to collect the foam, not only improve the efficiency of collecting the foam, reduce the cost of manual collection foam moreover. In specific implementation, the suction device 5 comprises a centrifugal fan, a regulating buoyancy tank and a suction structure. The air inlet of the centrifugal fan is connected with the suction structure, and one side of the suction structure, which is far away from the centrifugal fan, is provided with a foam suction inlet. An air outlet of the centrifugal fan is connected with a foam output pipeline, and the other end of the foam output pipeline penetrates through the wall of the container 1 and then is connected with the foam buffer pool 2. The foam can be broken when the centrifugal fan sucks. The suction structure is fixed on the adjusting buoyancy tank, and the foam suction inlet of the suction structure is kept to be always positioned at the liquid level of the oxidation ditch to be treated by adjusting the buoyancy of the buoyancy tank, so that the continuous suction of foam is realized. Specifically, the suction structure is horizontally arranged and is integrally in a duckbill structure. The section of the suction structure is triangular, and the foam suction inlet is positioned on one side of the triangle, so that the contact surface between the foam suction inlet and the foam is large, the effective suction of the foam can be realized, and the suction speed is high.
During the implementation, still include main dosing pipe and the supplementary dosing pipe, main dosing pipe and the corresponding upper portion with main liquid medicine storage jar 31, supplementary liquid medicine storage jar 34 of supplementary dosing pipe one end link to each other, the other end with drain pipe 41 links to each other. A main dosing valve 33 is arranged on one side of the main dosing pipe close to the main liquid medicine storage tank 31, and an auxiliary dosing valve 36 is arranged on one side of the auxiliary dosing pipe close to the auxiliary liquid medicine storage tank 34. Like this, can add the liquid medicine respectively to main liquid medicine storage jar 31 and auxiliary liquid medicine storage jar 34 through main dosing pipe and auxiliary dosing pipe, avoid artifical the interpolation.
The working process of the mobile oxidation ditch foam collecting and dehydrating system is as follows.
(1) The integrated treatment process of foam collection and dehydration specifically comprises the following steps:
and S1, sucking the foam into the foam buffer pool 2.
The suction device 5 is opened, so that the suction device 5 sucks and conveys the foam into the foam buffer pool 2 for storage. And the stirrer in the foam buffer pool 2 is started to stir the foam.
And S2, controlling the operation of the dehydration device 4 through the electrical system, lifting the foam from the foam buffer pool 2 to the dehydration device 4 by the lifting pump 46 of the dehydration device 4, and controlling the operation of the dosing pump by the electrical system to pump the liquid medicine in the main liquid medicine storage tank 31 and/or the auxiliary liquid medicine storage tank 34 to the dehydration device 4.
The main medicine adding valve 33, the auxiliary medicine adding valve 36, the main medicine liquid overflow valve and the auxiliary medicine liquid overflow valve are closed, and the foam control valve 21, the main medicine liquid control valve 32 and/or the auxiliary medicine liquid control valve 35, the drain valve 42, the foam overflow valve and the overflow valve of the dehydration device 4 are opened. The electric system is turned on to control the operation of the dewatering device 4, and the lifting pump 46 of the dewatering device 4 lifts the foam from the foam buffer tank 2 to the reaction tank 44 in the dewatering device 4. During the lifting of the foam by the lift pump 46, the liquid medicine in the main liquid medicine storage tank 31 and/or the auxiliary liquid medicine storage tank 34 is pumped out by the medicine supply pump 37, wherein the liquid medicine in the main liquid medicine storage tank 31 is mixed with the foam and then pumped into the reaction tank 44, and the liquid medicine in the auxiliary liquid medicine storage tank 34 is directly pumped into the reaction tank 44. In the reaction tank 44, the foam and the liquid medicine are fully and uniformly mixed and flocculation reaction occurs. A stirrer may be provided in the reaction tank 44 to sufficiently mix the foam with the liquid medicine and accelerate the flocculation speed.
S3, dehydrating the foam by the dehydrating device 4, discharging the dehydrated liquid out of the container 1 through the drain pipe 41, and discharging the dehydrated sludge out of the container 1 through the sludge conveying pipeline.
The sludge flocculated in the reaction tank 44 enters a spiral-stacked dehydrator for dehydration treatment, and enters a concentration section, a large amount of flocculated sludge is rapidly separated from a liquid phase in the concentration section, and then the sludge is pushed to a dehydration section. In the dewatering section, the relative movement of the fixed ring and the movable ring and the continuous enhancement of the internal pressure of the filter chamber are utilized, so that the dewatering purpose is achieved, and the filter cake is discharged out of the machine.
Through the integrated treatment method for collecting and dehydrating the oxidation ditch foam, the collection and treatment of the oxidation ditch foam are realized, and the foam is finally treated into water and discharged, so that the labor intensity and the medicament cost are greatly reduced, the appearance of the oxidation ditch, the surface of the secondary sedimentation tank and the water outlet is effectively improved, and the method is economical and practical. The cleaning agent also has good cleaning effect on biological foams generated in the biochemical system under the low-temperature condition in winter.
(2) The dosing process of the integrated treatment system for foam collection and dehydration specifically comprises the following steps:
first, the main drug adding valve 33 and the main drug solution overflow valve are opened, and the auxiliary drug adding valve 36, the auxiliary drug solution overflow valve, the foam control valve 21, the main drug solution control valve 32 and/or the auxiliary drug solution control valve 35, the drain valve 42, the foam overflow valve, and the overflow valve of the dehydration device 4 are closed.
Then, one end of the drain pipe 41 extending to the outside of the container 1 is connected to a main chemical solution tank to be added, and chemical is added to the main chemical solution tank 31. Can realize adding medicine to main liquid medicine storage jar 31 according to the communicating vessel principle, also can set up a confession medicine pump 37 between drain pipe 41 and the main liquid medicine head tank, realize adding medicine fast to main liquid medicine storage jar 31. Similarly, the main medicine adding valve 33 and the main medicine liquid overflow valve are closed, and the auxiliary medicine adding valve 36 and the auxiliary medicine liquid overflow valve are opened, so that medicine can be added to the auxiliary medicine liquid storage tank 34.
Finally, the drainage pipe 41 is disconnected from the main chemical solution tank or the auxiliary chemical solution tank, and the closing state of each valve is adjusted to dehydrate the foam.
Will the utility model provides a pair of portable oxidation ditch foam collection dewatering system is arranged in a certain sewage treatment plant in banan fish hole in Chongqing city. The time is 30 days in 10 months in 2019 to 1 day in 11 months in 2019, the temperature is lower in winter, and the biological foam is serious.
Example 1
Firstly, a phosphorus removing agent is added into an oxidation ditch, biological foam mud is pumped to a foam buffer pool by a pumping device, and the volume of the biological foam is about 1.5m3. And then taking 0.15% PAM emulsion as main liquid medicine, wherein the dosage ratio of PAM absolute dry is 0.6%. And simultaneously conveying the PAM emulsion and the foam in the foam buffer pool to a screw stacking machine for mixing and flocculation, and then, conveying the mixture into a main body of a dehydrator for sludge dehydration. Setting system parameters of the screw stacking machine: the back pressure plate is 3mm, the front end of the back pressure plate is overlapped with the spiral rotating speed of 21hz, and the frequency of a mixing tank stirring motor is 37 hz. The foam and dewatered sludge are shown in fig. 3 and 4.
Example 2
Firstly, a phosphorus removing agent is added into an oxidation ditch, biological foam mud is pumped to a foam buffer pool by a pumping device, and the volume of the biological foam is about 1.5m3. Taking PAM emulsion with the concentration of 0.15% as main liquid medicine, conveying the PAM emulsion and sludge in a cache tank to a spiral shell stacking machine according to the proportion of 10:1 for mixing and flocculation, then taking PAC dry powder to prepare solution with the concentration of 3%, directly conveying the solution to the spiral shell stacking machine, then entering a dehydrator main body for sludge dehydration, and setting system parameters of the spiral shell stacking machine: the back pressure plate is 3mm, the front end of the back pressure plate is overlapped with the spiral rotating speed of 21hz, and the frequency of a mixing tank stirring motor is 37 hz.
The water content in the sludge treatment process in example 1 and example 2 was:
| the water content of the foam is% | The water content of the sludge is% | |
| Example 1 | 98-99 | Less than 80 percent |
| Example 2 | 98-99 | Less than 80 percent |
As can be seen, in both the example 1 and the example 2, the foam liquid is separated from the sewage system through buffering, dosing, conditioning and flocculation, and finally forming solid sludge for discharge. According to a sewage treatment plant with the treatment scale of 3 ten thousand in a day, when the biological foam is treated in winter, the modes of manual salvage, intermediate water dispersion and medicament addition are generally adopted. About 6 persons are needed to salvage the biological foam in winter, the price of each person is calculated according to 200 yuan, the duration of the biological foam in winter is calculated according to 4 months, and the manual salvage cost is about 14.4 ten thousand yuan. And (3) adding an antifoaming agent for defoaming in an auxiliary manner at night, wherein the unit price of the antifoaming agent is 1.45 ten thousand yuan/ton and the adding cost of the antifoaming agent in winter is 8.7 ten thousand yuan calculated according to 50kg of adding per day. Therefore, the cost of artificially salvaging and adding the biological foam is about 23 ten thousand yuan per year.
The utility model provides a dewatering system is collected to portable oxidation ditch foam has good collection treatment to biological foam, not only reduces artifical intensity of labour and medicament cost by a wide margin to effectively improved oxidation ditch, two heavy pond pool faces and delivery port impressions, economical and practical. In addition, the system is arranged in a container mode, has strong liquidity, can realize flexible configuration, does not bring extra site burden, and has wide application range and low use cost.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that those modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all should be covered in the scope of the claims of the present invention.
Claims (9)
1. A mobile oxidation ditch foam collecting and dewatering system is characterized by comprising a container, a foam buffer pool, a dosing device, a dewatering device and an electrical system, wherein the foam buffer pool, the dosing device, the dewatering device and the electrical system are arranged in the container; wherein the content of the first and second substances,
the lower part of the foam buffer pool is provided with a foam outlet;
the dosing device comprises a main liquid medicine storage tank, and the main liquid medicine storage tank is provided with a main liquid medicine output pipe;
the dehydration device is provided with a feed inlet, a liquid outlet and a sludge outlet, and the dehydration device is provided with a lift pump, and the inlet of the lift pump forms the feed inlet;
a foam discharge port of the foam buffer pool is connected with a feed port of the dewatering device through a foam discharge pipeline, and a foam control valve is arranged on one side, close to the foam buffer pool, of the foam discharge pipeline; one end of the main liquid medicine output pipe is connected with the main liquid medicine storage tank through a liquid medicine supply pump, the other end of the main liquid medicine output pipe is communicated with a pipeline between the foam discharge port and the feed port, and a main liquid medicine control valve is arranged on one side, close to the main liquid medicine tank, of the main liquid medicine output pipe; the liquid outlet of the dewatering device is connected with one end of a drain pipe, the other end of the drain pipe extends out of the container, and a drain valve is arranged at the position, close to the liquid outlet, of the drain pipe; the sludge outlet is connected with one end of a sludge conveying pipeline, and the other end of the sludge conveying pipeline also extends out of the container;
the medicine supply pump and the dehydration device are electrically connected with the electrical system, the dehydration device can be controlled to work through the electrical system, and the lifting pump of the dehydration device pumps and lifts foam and liquid medicine into the dehydration device.
2. The mobile oxidation ditch foam collecting and dewatering system of claim 1, further comprising an adjuvant storage tank having an adjuvant output pipe, wherein the adjuvant output pipe is connected to the adjuvant storage tank at one end via a drug supply pump and directly connected to the dewatering device at the other end; an auxiliary liquid control valve is arranged on one side of the auxiliary liquid output pipe close to the auxiliary liquid tank.
3. The mobile oxidation ditch foam collecting and dehydrating system of claim 2, wherein overflow pipes are respectively provided at upper portions of the foam buffer tank, the main chemical storage tank, the auxiliary chemical storage tank and the dehydrating device; one end of the overflow pipe is correspondingly connected with the foam buffer pool, the main liquid medicine storage tank, the auxiliary liquid medicine storage tank and the dehydration device, and the other end of the overflow pipe is connected with the drain pipe; and a foam overflow valve, a main liquid medicine overflow valve, an auxiliary liquid medicine overflow valve and a dehydration device overflow valve are correspondingly arranged on one side of the overflow pipe close to the foam buffer pool, the main liquid medicine storage tank, the auxiliary liquid medicine storage tank and the dehydration device.
4. The mobile oxidation ditch foam collecting and dewatering system of claim 2, further comprising a main dosing pipe and an auxiliary dosing pipe, wherein one end of the main dosing pipe and one end of the auxiliary dosing pipe are correspondingly connected with the upper parts of the main liquid medicine storage tank and the auxiliary liquid medicine storage tank, and the other ends of the main dosing pipe and the auxiliary dosing pipe are connected with the drain pipe; the main medicine adding pipe is provided with a main medicine adding valve at one side close to the main medicine liquid storage tank, and the auxiliary medicine adding pipe is provided with an auxiliary medicine adding valve at one side close to the auxiliary medicine liquid storage tank.
5. The mobile oxidation ditch foam collecting and dewatering system of claim 2, wherein the dewatering device has a reaction tank, and the foam and the liquid medicine are pumped and lifted into the reaction tank by a lift pump.
6. The mobile oxidation ditch foam collecting and dewatering system of claim 2, wherein a flow meter is provided on each of the main liquid medicine output pipe of the main liquid medicine storage tank and the auxiliary liquid medicine output pipe of the auxiliary liquid medicine storage tank.
7. The mobile oxidation ditch foam collecting and dewatering system of claim 1, further comprising a suction device; the suction device is positioned at the outer side of the container and is provided with a foam suction inlet and a foam output port; and the foam output port is connected with the foam buffer pool through a pipeline.
8. The mobile oxidation ditch foam collection and dewatering system of claim 1, wherein the container has one or more sides with openable doors.
9. The mobile oxidation ditch foam collecting and dewatering system of claim 1, wherein a plurality of agitators are disposed in the foam buffer tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022001658.8U CN212222557U (en) | 2020-09-14 | 2020-09-14 | Mobile oxidation ditch foam collecting and dewatering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022001658.8U CN212222557U (en) | 2020-09-14 | 2020-09-14 | Mobile oxidation ditch foam collecting and dewatering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212222557U true CN212222557U (en) | 2020-12-25 |
Family
ID=73910535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022001658.8U Expired - Fee Related CN212222557U (en) | 2020-09-14 | 2020-09-14 | Mobile oxidation ditch foam collecting and dewatering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212222557U (en) |
-
2020
- 2020-09-14 CN CN202022001658.8U patent/CN212222557U/en not_active Expired - Fee Related
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