CN115745042A - Environment-friendly and energy-saving treatment system for urban sewage - Google Patents
Environment-friendly and energy-saving treatment system for urban sewage Download PDFInfo
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- CN115745042A CN115745042A CN202211475295.9A CN202211475295A CN115745042A CN 115745042 A CN115745042 A CN 115745042A CN 202211475295 A CN202211475295 A CN 202211475295A CN 115745042 A CN115745042 A CN 115745042A
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Abstract
The invention provides an environment-friendly and energy-saving treatment system for urban sewage; the treatment system comprises a mixing part, a coagulation aiding part and a settling part; the mixing part comprises a plurality of discharge grooves for discharging the flocculating agent to the water body, the discharge grooves uniformly and controllably discharge the flocculating agent to the water body of the mixing part through a spiral rod arranged inside, and simultaneously, the flocculating agent is preliminarily mixed with the water body through the intervals of the discharge grooves and a rectification section arranged behind the discharge grooves; further, in the laminar flow section of the coagulation aiding part, the monitoring units for monitoring the positions of the plurality of laminar flow sections are arranged, the flocculation degrees of the plurality of positions in the water body are dynamically monitored, so that the stirring blades of the stirring unit are controlled to reach the designated position to stir, and the further flocculation of the water body is promoted to form flocs.
Description
Technical Field
The invention relates to the field of water, wastewater or sewage treatment, in particular to an environment-friendly and energy-saving treatment system for urban sewage.
Background
In the traditional water supply treatment process, the method is used for purifying the raw water body from the urban sewage discharge pipeline by adopting the processes of mixing, flocculating, precipitating, filtering and the like. Microorganisms, soluble organic/inorganic matters, colloidal particles and the like existing in the original water body are not easy to precipitate due to gravity, and after impurities are removed through the three treatment stages of mixing, flocculation and precipitation, the treatment pressure of the filtering section can be obviously reduced, so that finally residual micro-flocs or particles can be filtered, and finally the domestic water meeting the cleanliness standard of related application can be obtained.
In the mixing stage, a coagulant is added into raw water, the raw water has a solid-liquid separation effect, and most of colloidal impurities in the water lose stability; the destabilized colloidal particles mutually collide and agglomerate in a flocculation stage to finally form a floccule which can be settled in a settling stage, and the floccule is removed after static settling.
In order to fully mix the coagulant with the raw water body and form particles into flocs with sufficient sedimentation conditions in the flocculation stage, mechanical stirring and rain stirring are generally adopted in the mixing and flocculation stages to fully stir the mixed water body, and a multi-stage mixing stage is generally adopted, so that the mixing stage and the flocculation stage generally reach 40 minutes or more, and a large amount of stirring equipment needs to be driven to work in the process, and thus a large amount of energy needs to be consumed. Under the current trend of energy conservation and emission reduction, a technical scheme needs to be provided to improve the energy-saving effect of urban sewage treatment.
Looking up related published technical schemes, the technical scheme with publication number of CN110668625A provides a high-efficiency energy-saving desulfurization wastewater treatment process system, which comprises a pre-settling tank, a mud scraper, a draught fan, an evaporation tower, a wastewater circulating pump, a slurry tank, a thick slurry pump, a spray drying tower, a stirrer and a sludge pump, wherein system incoming water is collected into the pre-settling tank through a pipeline, when the torque of the mud scraper reaches a set value, sludge is sent into a gypsum dehydration system through the sludge pump for dehydration treatment, a motor and the fan are started, wastewater at the upper part in the pre-settling tank passes through the evaporation tower from the upper part of the pre-settling tank, the wastewater is evaporated through the evaporation tower, the wastewater is discharged into the slurry tank after the concentration of the wastewater reaches a certain numerical value, then is discharged into the spray drying tower, high-temperature flue gas in a flue in front of an inlet of an air preheater is introduced into the spray drying tower, and salt in the slurry is analyzed; so that the sludge can be effectively separated and is convenient for subsequent transportation; the technical scheme of the publication number WO2014157751A1 provides an energy-saving prediction system and method for diagnosing the energy consumption state of a sewage treatment plant, and performs qualitative state diagnosis on energy consumption caused by operating equipment, such as pumps and blowers of the treatment plant; providing a set value of an operation condition that allows power saving according to the diagnosis result; confirming in advance that the amount of energy used decreases; thereby providing a practical operation set value for reducing energy use; the technical scheme disclosed as JP2013159925A provides an energy-saving sewage treatment scheme system, which measures water levels and flow conditions at a plurality of positions in an area through a water level sensor arranged in a lower channel, so that a specified water gap valve is controlled to be opened, sewage is controlled to flow into a specified treatment workshop of a sewage treatment plant, and the dynamic balance of treatment load of each workshop of the sewage treatment plant is achieved.
The technical scheme refers to the whole scheme arrangement of a large-sized sewage treatment system, but the energy-saving solution of the small-sized sewage treatment system is rarely mentioned.
The foregoing discussion of the background art is intended only to facilitate an understanding of the present invention. This discussion is not an acknowledgement or admission that any of the material referred to is part of the common general knowledge.
Disclosure of Invention
The invention aims to provide an environment-friendly and energy-saving treatment system for urban sewage; the treatment system comprises a mixing part, a coagulation aiding part and a settling part; the mixing part comprises a plurality of discharge grooves for discharging the flocculating agent to the water body, the discharge grooves uniformly and controllably discharge the flocculating agent to the water body of the mixing part through a spiral rod arranged inside, and simultaneously, the flocculating agent is preliminarily mixed with the water body through the intervals of the discharge grooves and a rectification section arranged behind the discharge grooves; further, in the laminar flow section of the coagulation aiding part, the monitoring units for monitoring the positions of the plurality of laminar flow sections are arranged, the flocculation degrees of the plurality of positions in the water body are dynamically monitored, so that the stirring blades of the stirring unit are controlled to reach the designated position to stir, and further flocculation of the water body is promoted to form flocs.
The invention adopts the following technical scheme:
an environment-friendly and energy-saving treatment system for urban sewage comprises a mixing part, a coagulation assisting part and a settling part which are sequentially arranged; and a control part in communication connection with the mixing part, the coagulation assisting part and the settling part;
the mixing part is used for releasing a flocculating agent to the water to be treated and mixing the flocculating agent with the water body to form a first water body;
the coagulation aiding part is used for maintaining the flocculation time of the first water body, enhancing the flocculation effect, and acquiring the flocculation degree of the first water body in real time by arranging one or more monitoring units; the first water body becomes a second water body after passing through the coagulation aiding part;
the sedimentation part is used for carrying out sedimentation treatment on formed flocs in a second water body and further carrying out rear-end purification on the second water body;
the control part is used for controlling the processing system to work;
preferably, a discharge section and a rectification section are sequentially arranged in the mixing part; the discharge section comprises one or more cylindrical discharge grooves; the discharge groove is arranged perpendicular to the water flow direction; a spiral rod rotating around the central shaft of the discharge groove is arranged in the discharge groove; the surface of the discharge groove is provided with a discharge seam, and the opening and closing degree of the discharge seam is controlled by the control part; after entering the discharge groove, the flocculating agent is driven to move along the central axis direction of the discharge section by the rotation of the screw application rod and flows out of the discharge groove at a discharge seam; and controlling the release amount and release rate of the flocculating agent by adjusting the opening degree of the release seam and the rotating speed of the screw rod;
preferably, a plurality of rectifying walls are arranged in the rectifying section, the rectifying walls are arranged on the water flow path, and the collision condition of the water flow and the rectifying walls is changed by changing the blocking area of the rectifying walls on the water flow path, so that vortex or turbulent flow is generated, and the mixing of the flocculating agent and the water body is promoted;
preferably, in said application section, said application slot is provided with a movable mechanism; adjusting the distance among a plurality of the discharge grooves through the movable mechanism, thereby adjusting the flow velocity of the water body to be treated in the discharge section;
preferably, the coagulation promoting part comprises a filtering section and a laminar flow section; wherein the content of the first and second substances,
the filtering section is provided with one or more filtering layers; the filtering section is used for removing large particles in the first water body and enabling the particles in the first water body to be mixed and collided with the flocculating agent more in the flowing process so as to promote the flocculation effect; one or more than one filter layers have different filter pore sizes, and the size of the filter pore size is set from small to large according to the flow direction of the first water body;
the laminar flow section is arranged above the filtering section; after the first water body passes through the filtering section, continuously forming gradually-increased flocculating constituents in the rising process of the laminar flow section;
and the laminar flow section is provided with a stirring component; the stirring assembly comprises a rotating shaft, a stirring impeller connected with and driven by the rotating shaft, and a driving device for driving the rotating shaft; the first end of the rotating shaft is positioned at the upper part of the laminar flow section and is driven by the driving device to rotate; the second end of the rotating shaft extends to the middle of the laminar flow section and is positioned above the filtering section; the rotating shaft is in power connection with the stirring impeller and is used for driving the stirring impeller to rotate and stir above the filtering section;
preferably, in the stirring assembly, a moving frame is arranged at an upper position of the laminar flow section, and a first slide rail allowing the moving frame to move in a horizontal direction; the driving device is fixedly arranged on the moving frame, and the first end of the driving device is movably connected with the rotating shaft; controlling the movable frame to move on the first sliding rail, so that the first end of the rotating shaft is positioned at a plurality of preset positions in the horizontal direction;
preferably, in the stirring assembly, the rear part of the second end of the rotating shaft is movably connected to a multi-directional bearing; the multi-directional bearing is fixed on a movable base; a second sliding rail is arranged in the middle of the laminar flow section; the movable base is movably arranged on the second slide rail; controlling the movement of the moving base to enable the second end of the rotating shaft to be positioned at a plurality of preset positions in the horizontal direction;
preferably, the middle part of the rotating shaft is also provided with a pneumatic connecting section; changing the length of the rotating shaft by controlling the expansion and contraction of the pneumatic connecting section, so as to change the distance between the first end and the second end of the rotating shaft;
preferably, a plurality of monitoring units are arranged at a plurality of positions of the laminar flow section, and the flocculation degree of the first water body at a plurality of target positions in the laminar flow section is obtained, so that the movement of the moving frame and the moving base is controlled, and the stirring impeller reaches the specified target position for stirring;
preferably, the monitoring unit sends monitoring data of the first water body to the control part, and the control part changes working parameters of the discharge section and the rectification section according to the flocculation degree of the first water body after judging the flocculation degree of the first water body according to the monitoring data.
The beneficial effects obtained by the invention are as follows:
1. the treatment system is different from a method for independently throwing the flocculating agent in the conventional sewage treatment system, the flocculating agent can be thrown from a plurality of positions of the water body by using a movable throwing groove mode, and the passing area of the water body when passing through the throwing groove is changed by changing the intervals of the plurality of throwing grooves, so that the water body can flow into the rectifying section at an accelerated speed, stronger vortex and turbulence effects are generated in the rectifying section, and the mixing of the flocculating agent and the water body is enhanced;
2. the treatment system can be suitable for the diversity characteristics of urban sewage, and the flocculation degree of the water body is dynamically monitored by the monitoring unit, so that the retention time of each treatment section and the strength of stirring and settling working equipment are reduced under the condition of higher flocculation degree, and the aim of saving energy is fulfilled;
3. the treatment system realizes the targeted stirring of the specific horizontal position and the depth position of the water body in the flocculation stage through the movable stirring component arranged in the laminar flow section, thereby achieving the effect of energy conservation;
4. the processing system adopts modular design of each hardware part, thereby facilitating the upgrading or the replacement of related software and hardware environments in the future and reducing the use cost.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is an overall schematic view of a treatment system according to the present invention;
FIG. 2 is a schematic view of the mixing section in an embodiment of the present invention;
FIG. 3 is a schematic view of an applicator slot according to an embodiment of the present invention;
FIG. 4 is a schematic view of the coagulation aid according to an embodiment of the present invention;
FIG. 5 is a schematic view of an agitation assembly according to an embodiment of the present invention;
FIG. 6 is a schematic view of a monitoring area in an embodiment of the present invention;
fig. 7 is a schematic diagram of the monitoring unit according to the embodiment of the present invention.
The reference numbers illustrate:
1-water to be treated; 2-a first body of water; 3-a second body of water; 10-a mixing section; 20-a coagulation aid section; 30-a sink portion; 11-a delivery section; 12-a rectifying section; 110-discharge slot; 111-a chute; 112-sliding end; 113-a screw rod; 114-a drive end; 115-apply the suture; 121-upper wall; 122-lower wall; 201; a first-stage filter layer; 202-a secondary filtration layer; 501-rotation axis; 502-stirring blades; 503-a driver; 504-an output shaft; 505-right angle drive; 506-a transmission shaft; 507-universal joint coupling; 508-a mobile rack; 509-a first slide rail; 510-a multidirectional bearing; 511-mobile base; 512-a second sliding rail; 513-a telescopic connection section; 601-monitoring area; 710-a fixture; 720-camera; 730-backlight.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it is to be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or assembly referred to must have a specific orientation.
The first embodiment is as follows:
in order to treat fine colloidal particles, soluble pollutants, phosphorus-containing pollutants and the like contained in water to be treated, in a common large civil water purification system at present, a flocculating agent is added into the water to be purified by using a mixing device, and the flocculating agent and the water to be treated 1 naturally flow to form a flocculating body; the sediments or micro-floccules generated in the mixing process effectively collide under natural flow to form a large floccule easy to precipitate;
in the process of forming the flocculating constituent by treatment, how to fully mix the flocculating agent with the water body obviously influences the efficiency of subsequent water body purification, so a large amount of mechanical equipment is usually adopted for long-time stirring in the water body, and a large amount of energy is consumed for relevant treatment machinery in the process; therefore, the sewage treatment system for improving the mixing efficiency of the flocculating agent and reducing the energy consumption of the stirring equipment is provided;
as shown in figure 1, the system for treating urban sewage in an environmental protection and energy saving way comprises a mixing part 10, a coagulation-aiding part 20 and a settling part 30 which are arranged in sequence; and a control part which is connected with the mixing part 10, the coagulation aiding part 20 and the settling part 30 in a communication way;
the mixing part 10 is used for releasing a flocculating agent to the water 1 to be treated and mixing the flocculating agent with a water body to form a first water body 2;
the coagulation aiding part 20 is used for maintaining the flocculation time of the first water body 2, enhancing the flocculation effect, and acquiring the flocculation degree of the first water body 2 in real time by arranging one or more monitoring units; the first water body 2 becomes a second water body 3 after passing through the coagulation aiding part 20;
the settling part 30 is used for settling formed flocs in the second water body 3 and further performing rear-end purification on the second water body 3;
the control part is used for controlling the processing system to work;
wherein, an applying section 11 and a rectifying section 12 are sequentially arranged in the mixing part 10; the application section 11 comprises one or more cylindrical application grooves 110; the discharge groove 110 is arranged perpendicular to the water flow direction; a screw rod 113 rotating around the central axis of the application groove 110 is arranged in the application groove 110; the surface of the application groove 110 is provided with an application seam 115, and the opening and closing degree of the application seam 115 is controlled by the control part; after entering the discharge tank 110, the flocculant is driven to move along the central axis direction of the discharge section 11 by the rotation of the spiral rod 113, and flows out of the discharge tank 110 at a discharge slit 115; and controlling the release amount and release rate of the flocculant by adjusting the opening degree of the release seam 115 and the rotating speed of the screw 113;
the rectifying section 12 is provided with a plurality of rectifying walls which are arranged on a water flow path, and the collision condition of water flow and the rectifying walls is changed by changing the blocking area of the rectifying walls on the water flow path, so that vortex or turbulence is generated, and the mixing of a flocculating agent and a water body is promoted;
the monitoring unit sends monitoring data of the first water body 2 to the control part, and the control part judges the flocculation degree of the first water body 2 according to the monitoring data and then changes working parameters of the discharge section 11 and the rectification section 12 according to the flocculation degree of the first water body 2;
preferably, in said application section 11, said application slot 110 is provided with a movable mechanism; adjusting the distance between a plurality of said discharge slots 110 by means of said movable means, so as to adjust the flow rate of the water to be treated in said discharge section 11;
preferably, the coagulation promoting part 20 comprises a filtering section and a laminar flow section; wherein, the first and the second end of the pipe are connected with each other,
the filtering section is provided with one or more filtering layers; the filtering section is used for removing large particles in the first water body 2 and enabling the particles in the first water body 2 to be subjected to more mixing collision with the flocculating agent in the flowing process so as to promote the flocculation effect; and one or more of the filter layers have different filter pore sizes, and the size of the filter pore size is set from small to large according to the flow direction of the first water body 2;
the laminar flow section is arranged above the filtering section; the first water body 2 continuously forms flocculating constituents which are gradually increased in the rising process of the laminar flow section after passing through the filtering section;
and the laminar flow section is provided with a stirring component; the stirring assembly comprises a rotating shaft, a stirring blade connected with and driven by the rotating shaft, and a driving device for driving the rotating shaft; the first end of the rotating shaft is positioned at the upper part of the laminar flow section and is driven to rotate by the driving device; the second end of the rotating shaft extends to the middle of the laminar flow section and is positioned above the filtering section; the rotating shaft is in power connection with the stirring blade and is used for driving the stirring blade to rotate and stir above the filtering section;
preferably, in the stirring assembly, a moving frame is arranged at an upper position of the laminar flow section, and a first slide rail allowing the moving frame to move in a horizontal direction; the driving device is fixedly arranged on the moving frame, and the first end of the driving device is movably connected with the rotating shaft; controlling the movable frame to move on the first sliding rail, so that the first end of the rotating shaft is positioned at a plurality of preset positions in the horizontal direction;
preferably, in the stirring assembly, the second end of the rotating shaft is movably connected to a multi-directional bearing; the multi-directional bearing is fixed on a movable base; a second sliding rail is arranged in the middle of the laminar flow section; the movable base is movably arranged on the second sliding rail; controlling the movement of the moving base to enable the second end of the rotating shaft to be positioned at a plurality of preset positions in the horizontal direction;
preferably, the middle part of the rotating shaft is also provided with a telescopic connecting section; changing the length of the rotating shaft by controlling the expansion and contraction of the telescopic connecting section, thereby changing the distance between the first end and the second end of the rotating shaft;
preferably, a plurality of monitoring units are arranged at a plurality of positions of the laminar flow section, and the flocculation degree of the first water body 2 at a plurality of target positions in the laminar flow section is obtained, so that the movement of the moving rack and the moving base is controlled, and the stirring blades reach the specified target positions for stirring;
as shown in FIG. 2, an exemplary embodiment of the applicator slot 110 is shown:
the discharge section 11 is arranged at an inlet of the water 1 to be treated; the water 1 to be treated enters the treatment system from an inlet and starts to pass through the discharge section 11; in the application section 11, a plurality of application grooves 110 are horizontally arranged and are arranged with the length direction thereof perpendicular to the water flow direction;
one embodiment is shown in FIG. 2, in which a plurality of discharge grooves 110 are arranged in a vertical array, and the vertex line of the same end forms an angle with the horizontal direction; while in some embodiments, the line connecting the endpoints of the plurality of discharge slots 110 may be a vertical line; in some embodiments, the plurality of gradient grooves may be arranged in other directions, including balanced with the direction of water flow, or perpendicular;
furthermore, on the two opposite walls of the container of the application section 11, sliding slots 111 are provided; the sliding groove 111 can be a C-shaped sliding groove, a U-shaped sliding groove or an L-shaped sliding groove; the sliding groove 111 can be a closed sliding groove to prevent pollutants in the water body from accumulating in the sliding groove 111;
further, as shown in fig. 3, the dispensing slot 110 includes a sliding end 112 movably connected to the sliding slot 111; the sliding end 112 may be implemented by a sliding bearing, a roller, a slider, or other forms, so that the sliding end 112 of the application slot 110 can move smoothly in the sliding slot 111; further, the other end of the discharge groove 110 opposite to the sliding end 112 thereof is a driving end 114; similarly, the driving end 114 is movably connected to the other side of the sliding chute, and the driving end 114 includes a transmission component, such as a sprocket, a gear, a belt pulley, a pneumatic slide rail, an electromagnetic slide rail, etc.; the driving end 114 is driven to enable the discharge groove 110 to move along the arrangement direction of the sliding groove 111; therefore, the distance between the two discharge grooves 110 can be adjusted according to the requirement by moving along the slide groove 111;
through the above adjustment embodiments, the flow area of the water flow is changed by the plurality of discharge grooves 110, so that the flow speed and the flow rate of the water flow are influenced;
further, in the discharge tank 110, a screw 113 is provided; the screw 113 has at least one helical groove attached extending around the axis of the screw 113; at one of the ends of the discharge tank 110, optionally a slide end 112, there is provided an input end for the flocculant; after entering the interior of the discharge tank 110 from the input end, the flocculant is pulled by the rotation of the screw rod to continue to move spirally along the sliding end 112 to the driving end 114;
further, on the outside of the application groove 110, an application slit 115 is provided; the application slot 115 extends from the exterior surface of the application slot 110 to the interior surface thereof, such that the flocculant may be released from the application slot 115 from the interior of the application slot 110 to the external environment; the width W of the application slot 115, optionally the diameter d of the screw 113, is in the following relationship:
W＝k 1 *d；
wherein k is 1 The proportional coefficient is proportional to the application ratio, and the value of the proportional coefficient is 0.2 to 0.3, preferably 0.2;
further, the maximum radius R of the outer surface of the screw 113 and the radius R of the inner wall of the application groove 110 have a specified clearance u, i.e. u = R-R; the value of the clearance u is maintained so that the screw 113 can rotate normally inside the application tank 110; an excessively small u value may cause the clogging phenomenon between the two, while an excessively large u value causes the flocculant to excessively flow out of the grooves of the screw 113, resulting in waste; preferably, the value of u is calculated by the following calculation:
u＝k 2 *d；
wherein k is 2 The rotating clearance coefficient is between 0.05 and 0.08, and preferably, the value is 0.05;
further, the application groove 110 also comprises a cover plate which is arranged on the controllable way and is used for closing the application seam 115; the flocculant application amount is further implemented by controlling the area of the cover plate covering the application slit 115;
further, turning to FIG. 2, an embodiment of the rectifier section 12 is illustrated: a plurality of groups of rectifying walls are arranged in the rectifying section 12, wherein each group of rectifying walls comprises an upper wall 121 and a lower wall 122; the upper wall 121 and the lower wall 122 are arranged at a certain included angle theta; when the water body flows out of the discharge section 11, the water body enters the rectifying section 12 from left to right as shown in the direction of fig. 2; after entering the rectifying section 12, the gas will collide with the upper wall 121 and the lower wall 122; the water flow continuously collides with the upper wall 121 and the lower wall 122 in the rectifying section 12, so that the water flow collision, vortex and turbulent flow are effectively generated, and the rapid stirring is generated, so that the injected flocculating agent and the water to be treated are rapidly mixed in a plurality of seconds;
preferably, both ends of the rectifying wall cross the width direction of the rectifying section 12; and one of the two ends of the rectifying wall is provided with a movable mechanism; the movable mechanism is connected to a driving device outside the wall of the rectifying section 12; the rectifying wall is driven by a driving device, so that the included angle theta between the upper wall 121 and the lower wall 122 can be changed; preferably, the included angle θ takes a value of 0 ° to 90 °; when the included angle θ is 0 °, that is, the upper wall 121 and the lower wall 122 are arranged in parallel, the flow of the water flow is hardly affected, and the method is suitable for the case of low pollution degree of the water to be treated; and when the included angle theta is larger than 45 degrees, the method is suitable for the condition that the water body to be treated is polluted at medium to medium and high degrees.
Example two:
this embodiment should be understood to include at least all of the features of any of the embodiments described above and further modifications thereon:
after the water body to be treated passes through the rectifying section 12, a flocculating agent is mixed with the water body to a certain degree; after entering the coagulation aiding part 20, further flocculation optimization treatment is carried out;
an embodiment of the coagulant aid 20 is illustrated by way of example:
as shown in fig. 4, after the water to be treated is mixed by the mixing part 10 to become the first water body 2, the water passes through the path arrangement in the treatment system and is introduced below the rectifying section 12;
the rectifying section 12 is sequentially provided with a filtering section and a laminar flow section on the flow path of the first water body 2;
preferably, one or more filter layers are provided in the filter segment; the filter medium of the filter layer is one or the combination of two or more of various filter media such as filter sponge, sand, anthracite, granular activated carbon, artificial light yarn, polyethylene granules, ABS resin granules, non-woven fabrics, fiber yarn, superfine fiber fabrics, polyester cotton, cotton linter, superfine fiber and the like; the fine particles in the first water body 2 are attached to and detached from the surface of the filter medium along with the circulation of water flow, and the process is repeated; and in the process, the particles in the first water body 2 continuously react with the flocculating agent to gradually generate tiny flocculates; the flocculate generated primarily is washed by water flow repeatedly, so as to separate from the filter layer;
it is noted, however, that the purpose of the filter layer is not to remove flocs, but rather to allow the first body of water 2 to remain in the filter medium for more time to react with the flocculant; therefore, if the air gap of the filter medium is too small or the pore size of the filter medium is too small, and the thickness of the filter layer is too large, the head loss due to clogging of the pores may be excessive; the flocculate is damaged by the impact of water flow before being separated, so that the flocculate can not be enlarged all the time; this is not desirable;
to overcome this problem, the thickness of the filter media layer is sufficient, about 5 to 20 cm, and as in the case of the ascending water flow of this embodiment, a certain space is provided between the two filter layers, which can improve the efficiency of attachment of fine particles in the water body, while allowing further accelerated formation of larger flocs after passing upward through one of the filter layers;
meanwhile, the plurality of filtering layers should consider that the individuals of the filtering layers will gradually increase in the process of the gradual formation of the micro flocs, so the size of the air gap of the filtering medium or the pore size of the filtering medium should gradually increase between the filtering layers arranged in sequence along with the direction of the water flow, so that the individual enlarged flocs can completely pass through the whole filtering layer; as shown in the drawing, a primary filter layer 201201 and a secondary filter layer 202202 are provided, and the size of the air gap of the filter medium or the pore size of the filter medium of the secondary filter layer 202202 is larger relative to the primary filter layer 201201;
further, in order to maximize the efficiency of precipitation in sewage treatment, it is important to form large flocs of fine particles contained in water to be treated; larger flocculants are needed to be achieved by collisions between particles, between particles and previously formed flocculants, and between flocculants; wherein, the strengthening flocculation of fine particles or floccules in the water body is an important means by stirring the water body to generate violent collision; and mechanical stirring is taken as an important stirring method;
the mechanical stirring is carried out by a stirring device which is composed of a motor with adjustable rotating speed, a horizontal shaft or a vertical shaft and a plurality of stirring blades of a driving paddle type, a conical type, a spiral type and the like; the main working factors of the flocculation stage adopting mechanical stirring comprise the stirring intensity and the flocculating agent formation time; the flocculation time is generally measured in the range of 20 to 40 minutesThe rotating peripheral speed of the paddle and other stirrers is 15-80 cm/s; the average stirring intensity (velocity gradient value) is 10 to 100s -1 Within the range of (1); and the numerical value of the working parameter is gradually decreased along with the flowing direction of the water body; this means that the water should be vigorously stirred as soon as possible after passing through the filtration section and initially entering the laminar flow section to increase the collision efficiency of fine particles; in the later stage of the laminar flow section, mild stirring is carried out to prevent the formed floccules from being damaged;
based on the above description, an embodiment of mechanical stirring arranged in a laminar flow section is exemplarily described:
as shown in fig. 5, the stirring assembly includes a rotating shaft 501, a stirring blade 502 and a driver 503; wherein the drive 503 is preferably a motor; the driver 503 is connected to a right-angle transmission device 505 through an output shaft 504, and then transmits power to a transmission shaft 506 below; further, the transmission shaft 506 is connected with the rotating shaft 501 through a universal joint coupling 507, so that the transmission shaft 506 and the rotating shaft 501 can perform power transmission in states of various different included angles;
further, a moving rack 508 and a first slide rail 509 for allowing the moving rack to move in a horizontal direction are provided at an upper position of the container wall of the laminar flow section; the driving device can be installed and fixed above the movable frame, the transmission shaft 506 is relatively fixed below the movable frame through a fixed universal joint coupler 507, and the first end of the rotating shaft 501 can rotate around the universal joint coupler 507;
further, the moving rack 508 has a moving device, which carries the driver 503 to move on a first sliding rail 509; moving the moving frame 508 on the first slide rail 509 under control so that the first end of the rotating shaft 501 is located at a plurality of predetermined positions in the horizontal direction;
further, the second end of the rotating shaft 501 extends to the middle of the laminar flow section and is located above the filtering section; the rotating shaft 501 is in power connection with the stirring blade 502 and is used for driving the stirring blade 502 to rotate and stir above the filtering section;
preferably, the rear part of the second end of the rotating shaft 501 is movably connected to a multi-directional bearing 510; the multi-directional bearing 510 is fixed on a movable base 511; a second slide rail 512 is arranged in the middle of the laminar flow section; the movable base 511 is movably mounted on the second slide rail 512; by controlling the movement of the moving base 511, the second end of the rotating shaft 501 is positioned at a plurality of predetermined positions in the horizontal direction.
The middle part of the rotating shaft 501 is also provided with a telescopic connecting section 513; by controlling the extension and retraction of the telescopic connection section 513, the length of the rotating shaft 501 is changed, thereby changing the distance between the first end and the second end of the rotating shaft 501.
Example three:
this embodiment should be understood to include at least all of the features of any of the embodiments described above and further refinements thereto:
in order to further monitor the flocculation condition of each position in the laminar flow section, as an exemplary embodiment, a plurality of monitoring units are arranged in the laminar flow section, the flocculation degree of the water body in the laminar flow section is collected, and the stirring position of the stirring assembly is controlled according to the flocculation degree;
as shown in fig. 6, a plurality of monitoring areas 601 are provided above the last filter layer, at positions bordering the laminar flow section; preferably, each of the plurality of monitoring areas 601 is provided with a monitoring unit;
for illustrative purposes only, the monitoring unit is shown in fig. 7 and includes a fixing member 710, a camera 720, an illuminating member (not shown), and a backlight 730; the camera 720 is connected with the fixing part 710 and is used for acquiring a water quality image; the illuminating piece is arranged in the circumferential direction of the camera 720, and the illuminating direction of the illuminating piece is consistent with the shooting direction of the camera 720; the backlight unit 730 is connected to the fixing unit 710, and the backlight unit 730 is disposed in a photographing direction of the photographing unit 720 and spaced apart from the photographing unit 720 to form a channel. Specifically, the mount is stainless steel, and mounting 710 is fixed in the coagulating basin, and image pick-up 720 is waterproof camera device, for example: the camera module can bear the water pressure interference of 10 meters underwater, and the camera 720 is placed in the coagulation tank to obtain a water quality image; the illuminating element comprises a plurality of LEDs, for example: twelve LEDs are included, and a plurality of LEDs are embedded in the circumferential direction of the camera 720 to provide a uniform light source for shooting by the camera 720. The backlight 730 is opposite to the camera 720, and a channel formed by the backlight 730 and the camera 720 is used as an observation window of the camera 720, for example: the backlight 730 is arranged at 4cm of the shooting direction of the camera 720; the camera 720 obtains the water quality image passing through the observation window and transmits the water quality image to the control part; the control part runs an image analysis system and is in communication connection with the camera 720; the image analysis system analyzes the water quality image to obtain characteristic parameters of a flocculating constituent in the coagulation tank, and comprises the following steps: parameters such as particle size, shape, particle size distribution, fractal dimension and the like of the particles are further used for judging the coagulation effect; it can be understood that, in the present embodiment, the shape and size of the backlight 730 can be adaptively adjusted according to the needs, but the backlight 730 should be able to cover the shooting range of the camera 720;
according to the monitoring result of each monitoring area 601, controlling the stirring component to move the stirring blade to the position of the designated monitoring area 601 to strengthen the stirring;
preferably, the monitoring area 601 with more flocs may be preferentially stirred;
preferably, based on the flocculation conditions of a plurality of monitoring areas 601 at the same time, the areas with smaller individual flocculating constituents are intensively stirred;
preferably, when the flocculation condition meets the standard flocculation degree, stopping the operation of the stirring component to save energy consumption;
preferably, this includes enhancing agitation of a monitored area 601 when it is detected that there is insufficient water in the area to flush flocs from the surface of the filter bed.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many elements are examples and do not limit the scope of the disclosure or claims.
Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
In conclusion, it is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that these examples are illustrative only and are not intended to limit the scope of the invention. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (10)
1. The environment-friendly and energy-saving treatment system for the urban sewage is characterized by comprising a mixing part, a coagulation assisting part and a settling part which are sequentially arranged; and a control part in communication connection with the mixing part, the coagulation assisting part and the settling part;
the mixing part is used for releasing a flocculating agent to the water to be treated and mixing the flocculating agent with the water body to form a first water body;
the coagulation aiding part is used for maintaining the flocculation time of the first water body, enhancing the flocculation effect, and acquiring the flocculation degree of the first water body in real time by arranging one or more monitoring units; the first water body becomes a second water body after passing through the coagulation aiding part;
the sedimentation part is used for carrying out sedimentation treatment on formed flocs in a second water body and further carrying out rear-end purification on the second water body;
the control part is used for controlling the processing system to work.
2. The system for environmental protection and energy conservation of municipal sewage according to claim 1, wherein a discharge section and a rectification section are sequentially provided in said mixing section; the discharge section comprises one or more cylindrical discharge grooves; the discharge groove is arranged perpendicular to the water flow direction; a spiral rod rotating around the central shaft of the discharge groove is arranged in the discharge groove; the surface of the discharge groove is provided with a discharge seam, and the opening and closing degree of the discharge seam is controlled by the control part; after entering the discharge groove, the flocculating agent is driven to move along the central axis direction of the discharge section through the rotation of the spiral application rod and flows out of the discharge groove at a discharge seam; and the release amount and release rate of the flocculating agent are controlled by adjusting the opening degree of the release seam and the rotating speed of the screw rod.
3. The system for environmental protection and energy conservation of municipal sewage according to claim 2, wherein a plurality of sets of rectification walls are disposed in the rectification section, and the rectification walls are disposed on the water flow path, so as to change the collision condition between the water flow and the rectification walls by changing the blocking area of the rectification walls on the water flow path, thereby generating vortex or turbulence and promoting the mixing of the flocculant and the water body.
4. An environmentally friendly and energy-saving municipal sewage treatment system according to claim 3, wherein in said application section, said application tank is provided with a movable mechanism; and adjusting the distance among a plurality of the discharge grooves through the movable mechanism, thereby adjusting the flow velocity of the water body to be treated in the discharge section.
5. The system for environmental protection and energy conservation of municipal sewage according to claim 4, wherein said coagulation aid comprises a filtration section, a laminar flow section; wherein the content of the first and second substances,
the filtering section is provided with one or more filtering layers; the filtering section is used for removing large particles in the first water body and enabling the particles in the first water body to be mixed and collided with the flocculating agent more in the flowing process so as to promote the flocculation effect; one or more than one filter layers have different filter pore sizes, and the size of the filter pore size is set from small to large according to the flow direction of the first water body;
the laminar flow section is arranged above the filtering section; after passing through the filtering section, the first water body continuously forms flocculating constituents which are gradually increased in the rising process of the laminar flow section;
and, there is stirring assembly in the said laminar flow section; the stirring assembly comprises a rotating shaft, a stirring impeller connected with and driven by the rotating shaft, and a driving device for driving the rotating shaft; the first end of the rotating shaft is positioned at the upper part of the laminar flow section and is driven to rotate by the driving device; the second end of the rotating shaft extends to the middle of the laminar flow section and is positioned above the filtering section; the rotating shaft is in power connection with the stirring impeller and is used for driving the stirring impeller to rotate and stir above the filtering section.
6. The system for environmental protection and energy conservation of municipal sewage according to claim 5, wherein said agitator assembly comprises a moving frame disposed at an upper position of said laminar flow section, and a first slide rail for allowing said moving frame to move in a horizontal direction; the driving device is fixedly arranged on the moving frame, and the first end of the driving device is movably connected with the rotating shaft; and controlling the movable frame to move on the first slide rail, so that the first end of the rotating shaft is positioned at a plurality of preset positions in the horizontal direction.
7. The system for environmental protection and energy conservation of municipal sewage according to claim 6, wherein in said agitator assembly, the rear of the second end of said rotating shaft is movably connected to a multi-directional bearing; the multi-directional bearing is fixed on a movable base; a second sliding rail is arranged in the middle of the laminar flow section; the movable base is movably arranged on the second sliding rail; the second end of the rotating shaft is positioned at a plurality of predetermined positions in the horizontal direction by controlling the movement of the moving base.
8. The system for environmental protection and energy conservation of municipal sewage according to claim 7, wherein said rotating shaft is further provided with a pneumatic connecting section in the middle; the length of the rotating shaft is changed by controlling the expansion and contraction of the pneumatic connecting section, so that the distance between the first end and the second end of the rotating shaft is changed.
9. The system of claim 8, wherein a plurality of monitoring units are disposed at a plurality of positions of the laminar flow section to obtain flocculation degree of the first water body at a plurality of target positions in the laminar flow section, so as to control the movement of the moving frame and the moving base, and the stirring impeller reaches the target position to stir.
10. The system as claimed in claim 9, wherein the monitoring unit sends the monitoring data of the first water body to the control part, and the control part determines the flocculation degree of the first water body according to the monitoring data and then changes the working parameters of the discharge section and the rectification section according to the flocculation degree of the first water body.
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| CN202211475295.9A CN115745042B (en) | 2022-11-23 | 2022-11-23 | Environment-friendly energy-saving treatment system for urban sewage |
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