CN215962260U - Rectangular inclined plate secondary sedimentation tank - Google Patents
Rectangular inclined plate secondary sedimentation tank Download PDFInfo
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- CN215962260U CN215962260U CN202121540258.2U CN202121540258U CN215962260U CN 215962260 U CN215962260 U CN 215962260U CN 202121540258 U CN202121540258 U CN 202121540258U CN 215962260 U CN215962260 U CN 215962260U
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- 238000004062 sedimentation Methods 0.000 title claims abstract description 129
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 198
- 238000005273 aeration Methods 0.000 claims abstract description 14
- 238000007790 scraping Methods 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 239000010802 sludge Substances 0.000 claims description 75
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000010865 sewage Substances 0.000 abstract description 23
- 230000014759 maintenance of location Effects 0.000 abstract description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 239000002245 particle Substances 0.000 description 24
- 238000000034 method Methods 0.000 description 8
- 230000001174 ascending effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000005189 flocculation Methods 0.000 description 7
- 230000016615 flocculation Effects 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 7
- 239000008187 granular material Substances 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000003311 flocculating effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229940037003 alum Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a rectangular sloping plate secondary sedimentation tank, which comprises a sedimentation tank body, a water inlet part, a sloping plate part, a water outlet part, a mud discharging part and a chain plate type mud scraping and skimming part, wherein the sedimentation tank body is made of reinforced concrete or steel structure, and the water inlet part, the sloping plate part, the water outlet part, the mud discharging part and the chain plate type mud scraping and skimming part are all arranged in the sedimentation tank body; the water inlet part comprises a water inlet channel, the water inlet channel is arranged along the edge of the sedimentation tank body, and water distribution holes are uniformly arranged at the bottom of the water inlet channel; the inclined plate part is arranged at the upper part of the sedimentation tank body, and the inclined plate part is provided with a perforated aeration pipe. The utility model designs a scheme that a rectangular peripheral inlet secondary sedimentation tank is arranged, the surface load of the secondary sedimentation tank is improved, the water yield of the unit area of the sedimentation tank is increased, the water quality of the outlet water is improved, and a lateral flow inclined plate is additionally arranged in the secondary sedimentation tank, so that the defects of long retention time, large volume and high investment of the secondary sedimentation tank of a sewage treatment plant are overcome.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a rectangular inclined plate secondary sedimentation tank.
Background
The precipitation is the simplest and most efficient process in the water treatment process, and the density difference of water and suspended matters is utilized to precipitate the mixed liquid or various suspended matters under the action of the self weight, so that the sludge and various suspended matters in the water are removed, and the aims of solid-liquid separation and sewage purification are fulfilled. Has the advantages of low energy consumption and simple and convenient operation.
After the sewage in the sewage treatment process is subjected to anaerobic, anoxic and aerobic biological reactions, organic matters in the sewage are converted into bacteria, namely activated sludge. At this time, a secondary sedimentation tank is needed for sedimentation, so that solid-liquid separation is realized. The secondary sedimentation tank of a general sewage treatment plant is mostly a radial flow type secondary sedimentation tank with central water inlet and peripheral water outlet, the structure has the defects that the water inlet disturbs the water head in the tank body greatly, the sludge is not beneficial to rapid sedimentation, the water inlet is concentrated on one side, the water inlet cannot be uniformly distributed in the tank, the volume of the tank body is fully utilized, and the sludge sedimentation is accelerated. The surface load of the radial flow secondary sedimentation tank is only 0.6-1.0 m 3/(m 2. h), and the retention time is 3-5 hours.
The activated sludge of the secondary sedimentation tank has the other characteristics of light weight, easy taking away of effluent and easy generation of secondary flow phenomenon. The radial flow secondary sedimentation tank can also improve the flowing distance and sedimentation effect of the mixed liquid in the tank by using the modes of peripheral water inlet and peripheral water outlet. The surface load of the circulating water entering the circulating secondary sedimentation tank can be increased to 1.0-1.5 m 3/(m 2. h), and the retention time is reduced to 2-3 hours.
The deformation of the circular periphery-in periphery-out secondary sedimentation tank is a rectangular periphery-in periphery-out secondary sedimentation tank, and the difference from the conventional horizontal flow sedimentation tank is as follows: the raw water of the traditional horizontal flow sedimentation tank enters water at one end of the short side of the rectangle and exits water at the other end of the rectangle. The rectangular periphery is fed into the secondary sedimentation tank, water is fed into one end of the long side of the rectangle, and the water is recycled in the tank and then returns to the water inlet end to be discharged. The surface load of the rectangular perimeter secondary sedimentation tank is designed as follows: 1.0-1.5 m 3/(m 2. h), and the retention time is 2 hours. The pool type saves more floor area than a round secondary sedimentation pool.
The above-mentioned sedimentation tank still has the following drawbacks: 1. the water yield per unit area is not high; 2. the secondary sedimentation tank of the water treatment plant has long retention time, large volume and high investment.
SUMMERY OF THE UTILITY MODEL
In view of the defects in the prior art, the utility model relates to a rectangular inclined plate secondary sedimentation tank, and designs a rectangular peripheral inlet and outlet secondary sedimentation tank according to the problems. The surface load of the secondary sedimentation tank is improved, the water yield of the unit area of the sedimentation tank is increased, the water quality of the discharged water is improved, and the scheme of arranging the lateral flow inclined plate in the secondary sedimentation tank is adopted, so that the defects of long retention time, large volume and high investment of the secondary sedimentation tank of the sewage treatment plant are overcome.
The utility model relates to a rectangular sloping plate secondary sedimentation tank, which comprises a sedimentation tank body, a water inlet part, a sloping plate part, a water outlet part, a mud discharging part and a chain plate type mud scraping and skimming part, wherein the sedimentation tank body is made of reinforced concrete or steel structure, and the water inlet part, the sloping plate part, the water outlet part, the mud discharging part and the chain plate type mud scraping and skimming part are all arranged in the sedimentation tank body; the water inlet part comprises a water inlet channel, the water inlet channel is arranged along the edge of the sedimentation tank body, and water distribution holes are uniformly arranged at the bottom of the water inlet channel; the inclined plate part is arranged at the upper part of the sedimentation tank body, and the inclined plate part is provided with a perforated aeration pipe; the water outlet part comprises a water outlet channel, the water outlet channel is arranged on the inner side of the water inlet channel, and the water outlet channel and the water inlet channel are arranged side by side; the sludge discharge part comprises a sludge discharge groove and a sludge discharge cover plate, the sludge discharge groove is arranged at the bottom of the sedimentation tank body, the sludge discharge cover plate is arranged above the sludge discharge groove, and a hole is formed in the sludge discharge cover plate; a sludge discharge channel is arranged in the area on the other side of the sedimentation tank body, and the sludge discharge channel is communicated with the sludge discharge groove; the chain plate type mud scraping and skimming part comprises a chain plate type mud scraper and a skimming pipe, the chain plate type mud scraper is arranged above the mud discharging groove, and the skimming pipe is arranged at the water surface position in the sedimentation tank body.
Furthermore, a water distribution pipe is pre-buried in the water distribution hole.
Further, the inclined plate part comprises a lateral flow inclined plate, and the inclined plate is positioned at the middle upper part of the sedimentation tank body.
Furthermore, a perforated aeration pipe is arranged at the lower part of the inclined plate.
Furthermore, a horizontally arranged baffle is arranged below the water distribution holes, and a water retaining skirt board which is vertically arranged is arranged on the inner side of the baffle.
Furthermore, the chain plate type mud scraper is a four-shaft chain plate type mud scraper device, a mud scraper is arranged at the bottom of the sedimentation tank body, and a scraper of the chain plate type mud scraper can move up and down along the direction of the bottom of the sedimentation tank through rotation of a driving chain and a main transmission shaft.
Furthermore, the main transmission shaft rotates and is driven by a chain wheel, the chain wheel is driven by a motor, and the motor is arranged above the sedimentation tank body.
Further, one end of the mud discharge groove is provided with an inner sleeve, and the inner sleeve is communicated with the mud discharge channel.
Furthermore, a sleeve mud discharging cylinder valve is arranged on the inner sleeve.
The game effect of the utility model is as follows: the surface load of the inclined plate sedimentation tank is high, the volume of the tank body is fully utilized, and the water yield can be increased by 3-5 times by the same floor area.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic plan view of an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional structure of an embodiment of the present invention.
Fig. 3 is a schematic diagram of a cross-sectional structure in a vertical direction according to an embodiment of the present invention.
Reference numeral, 1, an inlet channel; 2. water distribution holes; 3. a baffle plate; 4. a water retaining skirt plate; 5. a guide plate; 6. a sloping plate; 7. a water outlet channel; 8. perforating an aeration pipe; 9. a sludge discharge groove; 10. a mud discharge channel; 11. a mud discharge sleeve valve; 12. a chain plate type mud scraper; 13. a motor; 14. a skimming pipe.
Detailed Description
While the embodiments of the present invention will be described and illustrated in detail with reference to the accompanying drawings, it is to be understood that the utility model is not limited to the specific embodiments disclosed, but is intended to cover various modifications, equivalents, and alternatives falling within the scope of the utility model as defined by the appended claims.
For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking specific embodiments as examples with reference to the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.
The sedimentation tank comprises a sedimentation tank body, a water inlet part, a water outlet part, an inclined plate part, a sludge discharge part and a chain plate type sludge scraping and skimming part, wherein the sedimentation tank body is made of reinforced concrete or steel structure, and the water inlet part, the water outlet part, the inclined plate part, the sludge discharge part and the chain plate type sludge scraping and skimming part are all arranged in the sedimentation tank body; the water inlet part comprises a water inlet channel 1, water distribution holes 2, a baffle 3 and a water retaining skirt board 4, the water inlet channel 1 is arranged along the side edge of the sedimentation tank body, and the water distribution holes 3 are uniformly arranged at the bottom of the water inlet channel 1; the water outlet part comprises a water outlet channel 7, the water outlet channel 7 is arranged at the inner side of the water inlet channel 1, and the water outlet channel 7 and the water inlet channel are arranged side by side; the inclined plate is arranged at the upper part of the sedimentation tank, the perforated aeration pipe is arranged below the inclined plate, the sludge discharge part comprises a sludge discharge groove 9 and a sludge discharge cover plate, the sludge discharge groove 9 is arranged at the bottom of the sedimentation tank body, the sludge discharge cover plate is arranged above the sludge discharge groove 8, and the sludge discharge cover plate is provided with a hole; a sludge discharge channel 10 is arranged on one side of the sedimentation tank body, and the sludge discharge channel 10 is communicated with a sludge discharge groove 9; the chain plate type mud scraping and skimming part comprises a chain plate type mud scraper 12 and a skimming pipe 14, wherein the chain plate type mud scraper 12 is arranged above the mud discharging groove 9, and the skimming pipe 14 is arranged on the surface of the sedimentation tank.
The water inlet channel 1 is arranged on one side of the long edge of the sedimentation tank body, and the top of the channel 1 of the water inlet channel is flush with the top of the sedimentation tank body. In order to keep a certain flow scouring flow velocity in the channel and prevent sludge from precipitating at the bottom of the channel. The channel adopts a section with constant depth and gradually narrowed width. The water flow continuously flows into the lower sedimentation tank from the hole at the bottom of the channel along with the extension of the channel, and when the flow in the channel is continuously reduced, the scouring force of the water flow is ensured to ensure the constant speed of the water flow in the channel, the sludge is prevented from being precipitated and accumulated at the bottom of the channel, and the width of the channel is continuously reduced under the condition that the water depth of the channel is constant.
The bottom of the water inlet channel 1 is provided with a perforated water distribution pipe, and in order to ensure that the tank body distributes water uniformly, the water distribution pipe is configured by adopting water distribution holes with variable intervals according to the hydraulics principle. Namely, the hole pitch of the water outlet holes at the two ends of the front part and the rear part of the channel is properly enlarged, and the hole pitch of the middle part of the channel is properly shortened. Because the pressure head of the water flow at the front end of the channel is the largest, along-the-way head loss and flow of the water flow are reduced along with the flow of the water flow, and the water level in the channel is continuously reduced. The water flow speed is reduced at the tail part of the channel, the speed water head is converted into potential energy, and the water level of the channel is increased. Therefore, the water level in the middle of the channel is lowest, the overflowing pressure head is minimum, the water distribution amount is minimum, and the water distribution holes need to be properly encrypted.
The bottom of the water inlet channel 1 is provided with a water inlet hole 2, and a short pipe is installed in the water inlet hole 2 so as to ensure the accuracy of the sectional area of the water inlet hole. The water inlet channel can be uniformly distributed along the whole length of the channel, and water flow can stably enter the secondary sedimentation tank. Meanwhile, the water outlet of the water inlet pipe is avoided from generating a jet phenomenon, and the baffling baffle 3 is arranged at the bottom of the water distribution pipe, so that the water is rapidly and effectively dispersed to the whole downward water distribution flocculation area. In order to prevent the water flow from generating a short flow due to the cross flow, a flow guide apron board 4 is arranged at the bottom of the water inlet channel to promote the inflow water to flow downwards to enter a flocculation area at the bottom of the sedimentation tank.
The water flow slowly flows downwards at the bottom of the water inlet channel 1, and due to different sinking speeds of the sludge particles, the fast sinking particles catch up with the slow sinking particles, so that the sludge particles are contacted and collided to form large-particle alum flocs. When the water flow reaches the bottom of the pool and touches the 45-degree slope reflecting surface 5, the flow direction of the water flow is rotated by 90 degrees, and the water flow main body is changed from vertical downward flow to horizontal flow along the bottom of the pool. At 90 rotatory in-processes of rivers, radial motion is produced in the centrifugal force effect that aquatic particulate matter received, and centrifugal force orders about the direction of motion of granule and for accelerateing the downward sediment, and under the effect of centrifugal force, the granule velocity of motion that large granule and density are big is faster than little particulate matter, and large granule mud bumps from the back and adsorbs little particulate sludge, makes the mud granule become bigger, reaches the purpose that makes mud deposit to the bottom of the pool with higher speed.
In the horizontal flowing process of the water body at the bottom of the tank, large granular flocculates in the water are settled downwards to the bottom of the tank under the action of gravity. Because the sludge concentration at the bottom of the tank is high, the tank is equivalent to a high-density advection sedimentation concentration tank, and the sludge is in a layer-crowded sedimentation in the area. Meanwhile, suspended matters in the upper-layer backflow water body of the sedimentation tank descend from the upper part and are precipitated to the upper layer, the net catching and adsorption effects on granular sludge in the lower-layer inflow water are achieved, and the sludge concentration of the bottom layer is increased. Form mud internal circulation, the mud that falls in the upper strata rivers is as contacting mud, provides the required crystal nucleus of lower floor's sediment, makes the floc of formation have great proportion and inseparable state, can deposit rapidly, makes suspended particles deposit to the bottom of the pool with higher speed. The sewage is settled for the first time at the bottom of the pool.
When sewage flows to the opposite pool wall, the sewage meets the 45-degree slope reflecting surface 5, and the water flow is turned to 90 degrees again. The water body is changed from horizontal flow to upward flow. And similarly, the centrifugal force generated by the rotation of the water flow promotes the flocculation and precipitation among the sludge particles.
When the water flow is completely diverted, the water flow carries the residual suspended matters which are not settled to flow upwards slowly, the particle size of the suspended matters is small, and flocculation occurs in the ascending flow because the small particles with high ascending speed catch up with the large particles with low ascending speed, contact coagulation occurs, and the floccules with larger particles are generated. The large flocculating constituents have large density and sinking speed, the sinking speed of the particles is balanced with the rising speed of the water flow, a plurality of large-particle flocculating constituents equivalently stay in the water and are not moved to form a dynamic filtration sludge bed, and residual suspended matters in the rising water flow are adsorbed and removed in the dynamic filtration sludge bed.
The water flow passing through the sludge dynamic adsorption filter layer has the majority of suspended matters in the water removed. When the water flows to the water surface, the water flows back to the side of the water inlet channel under the suction action of the water outlet channel to form a circulation. In the flowing process of horizontal backflow of the top water body, granular sludge in water vertically sinks and falls into the primary settling area at the bottom layer, sludge circulation is automatically realized, and sludge net capture and adsorption in the primary settling area are promoted. The top layer reflux corresponds to the second sedimentation in the sedimentation basin.
From the above flow, it can be seen that: the first is that the rectangle goes into 4 processes of going out of the sedimentation tank all around: the descending flow is flocculated for the first time. Secondly, the following steps: the bottom layer horizontal flow is precipitated once. The third is that: secondary flocculation filtration of ascending flow, and the fourth is: the top layer is horizontally refluxed for secondary precipitation. Wherein the first precipitation suspended matter has high concentration and is layered precipitation. The suspended matter concentration has been reduced to a considerably low level at the second precipitation, and is free-settling. The rectangular secondary sedimentation tank is used for secondary sedimentation, so that the surface load rate is high. The surface load rate is about 1 time higher than that of the conventional secondary sedimentation tank. When the water quantity is the same, the occupied area of the secondary sedimentation tank is half smaller than that of the traditional secondary sedimentation tank.
In order to further improve the surface load rate of the rectangular periphery entering and exiting the sedimentation tank, namely, the water yield of the unit horizontal area of the sedimentation tank is increased, the content of suspended matters in the effluent of the sedimentation tank is reduced, and the effluent quality of a sewage treatment plant is improved. According to the utility model, the inclined sedimentation plate 6 is arranged in the secondary sedimentation area, which is horizontally reflowed by water flow at the top of the sedimentation tank and enters the periphery of the rectangular periphery, so that the sedimentation efficiency of the reflow area at the top of the sedimentation tank is increased. The inclined plate adopted by the utility model is a lateral flow sedimentation inclined plate. The advantages are that: the shallow layer sedimentation principle is utilized, and the water passing capacity of the sedimentation tank is improved. The sloping plate shortens the settling distance of sludge particles, and the sludge particles can fall on the surface of the sloping plate in a short time, so that the sludge particles are removed from the water body, and the purpose of reducing suspended matters in the water is achieved.
The sedimentation effect of the inclined tube used in the conventional secondary sedimentation tank is poor, and the main reason is that the sludge concentration in the sewage of the secondary sedimentation tank is too high, generally 3000-4000mg/L, and sometimes 5000-6000 mg/L. The settling characteristics of high concentration sludge are crowded settling where particles interfere with each other. The sedimentation speed of the particles is low, an upward flow inclined pipe is adopted more, the sedimentation direction of the particles is opposite to the ascending direction of water flow, the actual movement speed of the particles is the sum of the two, and when the ascending speed of the water flow is high, the sludge particles can not be precipitated, so that the effluent quality is deteriorated. The utility model provides an inclined plate installs in the secondary sedimentation district, and the sewage that gets into in the secondary sedimentation pond has once settled through the horizontal flow of bottom and the flocculation filtration of upflow, and mud in the sewage has been got rid of by most part, and the suspended solid concentration in the sewage has greatly reduced, and the suspended solid of the low concentration in the sewage at this moment deposits for free precipitation. Meanwhile, the water flow direction in the lateral flow inclined plate is vertical to the particle sinking direction, and the water flow in the horizontal flow direction cannot interfere with the vertically sinking particles. Therefore, the inclined plate cannot be used in a secondary sedimentation tank of a sewage treatment plant to cause failure. The function of the inclined sedimentation plate in water treatment can be fully exerted.
After a plurality of parallel inclined plates 6 are added to the secondary sedimentation tank, the wet circumference of the water passing section of the water tank is enlarged, and the hydraulic radius is reduced, so that the Reynolds number Re can be greatly reduced at the same horizontal speed v, the turbulence of water is reduced, and the particle sedimentation is promoted.
The side-flow inclined plates 6 are installed at the upper layer of the sedimentation tank, namely the upper half part of the 1/2 effective water depth. At the same time, an upflow flocculation channel needs to be reserved, namely, the water flow width of 1/2 effective water depth is reserved at the opposite pond wall of the water inlet channel. Meanwhile, the top of the sloping plate is reserved with 100mm water depth without placing the sloping plate, and the sloping plate is used as a walking channel of a scraper of the mud scraper and scrapes dirt such as foam floating on the water surface. The inclination angle of the inclined plate 6 is 60 degrees, the distance between the inclined plates is 100mm, the bottom of the inclined plate is arranged on the lower support frame, and two ends of the support frame are fixed on the wall of the tank.
In order to prevent bacteria from growing on the surface of the plate and sludge from accumulating to block a water flow channel when the inclined plate runs for a long time. The lower part of the inclined plate is provided with the perforated aeration pipe 8, the inclined plate 6 is aerated periodically, and the surface of the inclined plate is washed by utilizing ascending water flow and airflow, so that the sludge adhered to the surface of the inclined plate falls off and is precipitated to the bottom of the tank, the surface of the inclined plate is kept clean and smooth, and the normal operation of the sedimentation tank is maintained. The diameter of the perforated aeration pipe is generally d25mm-d50mm, the bottom of the perforated pipe is provided with holes with the aperture of 3-5mm and the distance of 200 mm. The spacing between the perforated branch pipes is 300mm-500 mm. Two ends of the perforated branch pipe are arranged on the annular gas supply main pipe to form an aeration system. The installation position of the aeration system is 300mm-500mm below the inclined plate. In order to ensure that the perforated pipe can uniformly discharge air, the perforated pipe needs to be horizontal, and the horizontal installation error of the whole pool is not more than 5 mm. The aeration intensity of the perforation aeration system is 80-120m3/（m2h) In the meantime.
In order to scrape off the sludge at the bottom of the sedimentation tank body and the foam on the water surface, the utility model adopts a chain plate type mud scraper 12. The chain plate type oil and mud scraper 12 is provided with two parallel closed traction chains, a plurality of scraping plates are arranged on the chains, and the chains drive the scraping plates to circularly run along an upper guide rail and a lower guide rail in the sedimentation tank and guide wheels at two ends to form a quadrilateral track under the traction of a driving device 13. The sludge settled at the bottom of the tank is scraped into a sludge accumulating groove 9 at the bottom of the tank by utilizing the up-and-down circulation and slow movement of the scraper and is discharged through a sludge discharge valve 10. The foam floating on the water surface is scraped and collected in the slag discharge pipe 14 to be discharged.
The bottom of the sedimentation tank body is provided with a plurality of sludge accumulation grooves 10 which are vertical to the water inlet channel. In order to keep constant water flow speed in the sludge accumulation groove during sludge discharge, the sludge accumulation groove adopts a gradually-wide section.
The working principle is as follows: the sedimentation tank body is made of reinforced concrete or steel structure, is integrally of a rectangular structure, and can be arranged in parallel by one or more tank bodies.
The sewage at the upper reaches enters the water inlet channel 1, and after passing through the water distribution holes 4, in order to prevent the sewage from directly rushing to the bottom of the tank and influencing the flow state in the tank body, the water flow is bent through the baffle 3 and the water-retaining skirt board 4, so that the water quantity is uniformly distributed, the impact force of water inflow is relieved, and the effects of reducing the speed and forming large circulation in the area are achieved.
Suspended solid in the sewage forms mud after the lower floor through quick sediment at the bottom of the sedimentation tank, gets into mud groove 9 through the trompil of the different apertures of mud groove 9 upper cover plate, through the mud method of static pressure formula row, discharges the mud in mud groove 9 in row mud canal 10 through interior sleeve valve 11. The chain-plate type mud scraper 12 runs along the bottom of the pool by adopting four-shaft chain-plate type mud scraping equipment, and scrapes mud when the scrapers run to the bottom of the pool and scrapes slag when the scrapers run to the water surface; sludge at the bottom of the tank is scraped into a sludge discharge groove 9, scum on the surface of the tank is scraped to a skimming pipe 14, and a driving motor 13 of a chain-plate type mud scraper 12 is arranged at the top of the tank body.
Water flows in the upper-layer backflow path and is precipitated by the lateral flow inclined plate 6, so that the water outlet load is increased, and the suspended matters remained in water are reduced. Meanwhile, the water flow short circuit is avoided due to the blocking of the inclined plate 6. When the inclined plate 6 is operated for a period of time, sludge is prevented from breeding, the perforated aeration pipe 8 at the bottom of the inclined plate can be facilitated to aerate the inclined plate 6, the inclined plate 6 vibrates, and dirt on the surface is removed.
Before the precipitated sewage flows into the water outlet channel 7, scum is blocked at the inner side of the water outlet channel by a scum baffle, and then the treated sewage uniformly flows into the water outlet channel 7 by a toothed triangular water outlet weir plate and finally enters a downstream structure.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a two heavy ponds of rectangle swash plate which characterized in that: the sedimentation tank comprises a sedimentation tank body, a water inlet part, an inclined plate part, a water outlet part, a mud discharging part and a chain plate type mud scraping and skimming part, wherein the sedimentation tank body is made of reinforced concrete or steel structure, and the water inlet part, the inclined plate part, the water outlet part, the mud discharging part and the chain plate type mud scraping and skimming part are all arranged in the sedimentation tank body; the water inlet part comprises a water inlet channel (1), the water inlet channel (1) is arranged along the edge of the sedimentation tank body, and water distribution holes (2) are uniformly arranged at the bottom of the water inlet channel (1); the inclined plate part is arranged at the upper part of the sedimentation tank body, and the inclined plate part is provided with a perforated aeration pipe (8); the water outlet part comprises a water outlet channel (7), the water outlet channel (7) is arranged on the inner side of the water inlet channel (1), and the water inlet channel and the water outlet channel are arranged side by side; the sludge discharge part comprises a sludge discharge groove (9) and a sludge discharge cover plate, the sludge discharge groove (9) is arranged at the bottom of the sedimentation tank body, the sludge discharge cover plate is arranged above the sludge discharge groove (9), and a hole is formed in the sludge discharge cover plate; a sludge discharge channel (10) is arranged in the area on the other side of the sedimentation tank body, and the sludge discharge channel (10) is communicated with a sludge discharge groove (9); the chain plate type mud scraping and skimming part comprises a chain plate type mud scraper (12) and a skimming pipe (14), the chain plate type mud scraper (12) is arranged above the mud discharging groove (9), and the skimming pipe (14) is arranged at the water surface position in the sedimentation tank body.
2. The rectangular sloping plate secondary sedimentation tank as claimed in claim 1, wherein: and water distribution pipes are embedded in the water distribution holes (2).
3. The rectangular sloping plate secondary sedimentation tank as claimed in claim 2, wherein: the inclined plate part comprises a lateral flow inclined plate which is positioned at the middle upper part of the sedimentation tank body.
4. The rectangular sloping plate secondary sedimentation tank as claimed in claim 3, wherein: the lower part of the inclined plate is provided with a perforated aeration pipe.
5. The rectangular sloping plate secondary sedimentation tank as claimed in claim 1, wherein: and a horizontally arranged baffling baffle (3) is arranged below the water distribution holes (2), and a vertically arranged water retaining skirt board (4) is arranged on the inner side of the baffling baffle (3).
6. The rectangular sloping plate secondary sedimentation tank as claimed in claim 1, wherein: the chain plate type mud scraper (12) is a four-shaft chain plate type mud scraper, a mud scraper is arranged at the bottom of the sedimentation tank body, and a scraper of the chain plate type mud scraper (12) can rotate through a driving chain and a main transmission shaft and can move up and down along the direction of the bottom of the sedimentation tank.
7. The rectangular sloping plate secondary sedimentation tank as claimed in claim 6, wherein: the main transmission shaft rotates and is driven by a chain wheel, the chain wheel is driven by a motor (13), and the motor (13) is arranged above the sedimentation tank body.
8. The rectangular sloping plate secondary sedimentation tank as claimed in claim 1, wherein: an inner sleeve is arranged at one end of the mud discharging groove (9), and the inner sleeve is communicated with the mud discharging channel (10).
9. The rectangular sloping plate secondary sedimentation tank as claimed in claim 8, wherein: a sleeve mud discharging cylinder valve (11) is arranged on the inner sleeve.
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| CN202121540258.2U CN215962260U (en) | 2021-07-07 | 2021-07-07 | Rectangular inclined plate secondary sedimentation tank |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113318489A (en) * | 2021-07-07 | 2021-08-31 | 杭州龙悦环保科技有限公司 | Rectangular inclined plate secondary sedimentation tank |
| CN114887358A (en) * | 2022-03-23 | 2022-08-12 | 中交(寿光)投资有限公司 | Secondary sedimentation tank device for A20 process |
-
2021
- 2021-07-07 CN CN202121540258.2U patent/CN215962260U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113318489A (en) * | 2021-07-07 | 2021-08-31 | 杭州龙悦环保科技有限公司 | Rectangular inclined plate secondary sedimentation tank |
| CN114887358A (en) * | 2022-03-23 | 2022-08-12 | 中交(寿光)投资有限公司 | Secondary sedimentation tank device for A20 process |
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