CN110841340A - Improved generation vertical flow sedimentation tank - Google Patents

Abstract

The invention discloses an improved vertical flow sedimentation tank which comprises a tank body, wherein a water inlet and a water outlet are formed in the tank body, a conical mud bucket with a large upper part and a small lower part is arranged at the bottom of the tank body, a mud scraping device is arranged in the tank body, the mud scraping device comprises a driving device, a central transmission shaft and a scraping plate, the central transmission shaft is connected with the output end of the driving device, the scraping plate is fixed on the central transmission shaft, the scraping plate is positioned on the inner side of the mud bucket, and a mud discharge port is formed in the bottom of the mud. The improved vertical flow sedimentation tank disclosed by the invention is characterized in that a sludge scraping device is arranged in a tank body, a driving device can drive a central transmission shaft to slowly rotate in the sewage treatment process, a scraper plate can scrape and stir sludge in a sludge hopper serving as a sludge concentration area, the fluidity of the sludge is increased, the sludge can be continuously and smoothly discharged from a sludge discharge port, the sludge blockage condition is avoided, the sedimentation effect on the sludge is good, the sludge discharge continuity and the sludge discharge efficiency are ensured, and the water quality purification effect is ensured.

Description

An improved vertical flow sedimentation tank

technical field

The invention relates to a sewage treatment device, in particular to an improved vertical flow sedimentation tank.

Background technique

Sedimentation tank is a common sewage treatment device or system, which has the function of removing suspended solids in water and purifying water quality. The structure of the existing sedimentation tank generally includes a tank body with a water inlet and a water outlet, a sedimentation device is arranged inside the tank body, and a mud collecting bucket is arranged at the bottom of the tank body. After the water flows into the pool through the water inlet, the sludge is settled in the sedimentation device and collected by the sludge collecting bucket, and the purified water is discharged from the water outlet. As disclosed in CN202822888U, a fast horizontal flow high-efficiency precipitation and separation device includes an upper rectangular tank body and a lower conical mud collecting bucket. Several rows of upper and lower parallel special-shaped inclined plates are arranged in the vertical direction of the rectangular tank body. The plate and the inclined plate are integrated, the inclined plate end of the special-shaped inclined plate is fixed on the vertical partition, the vertical baffle end is fixed on the vertical partition, and the two parallel special-shaped inclined plates and the vertical partition are adjacent to each other up and down. A horizontal overflow channel is formed. The cross-sectional shape of the overflow channel is a parallelogram. There is a mud discharge port between the vertical baffles of the upper and lower special-shaped inclined plates. The two rows of special-shaped inclined plates are arranged axially symmetrically with the vertical partitions to form a For the special-shaped inclined plate group, the area between the vertical spacers of the adjacent two special-shaped inclined plate groups is set as a mud discharge channel, and the mud discharge port between the vertical baffles of the upper and lower special-shaped inclined plate groups is connected to the mud discharge channel. Small, small footprint, fast, thorough and efficient separation of water and suspended solids. The existing sedimentation tank simply collects the sludge through the sludge collecting hopper. Due to the high viscosity of the sludge, it is easy to adhere and accumulate in the sedimentation device and the sludge collecting hopper, so that the sludge cannot be discharged in time and effectively, which affects the continuous discharge of the sludge. performance and sludge removal efficiency.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an improved vertical flow sedimentation tank with good sludge sedimentation effect, high sludge discharge continuity and high sludge discharge efficiency, aiming at the deficiencies of the prior art.

The technical solution adopted by the present invention to solve the above technical problems is: an improved vertical flow sedimentation tank, comprising a tank body, the tank body is provided with a water inlet and a water outlet, and the bottom of the tank body is provided with an upper large A small conical mud hopper is installed, and a mud scraping device is arranged in the tank body. The mud scraping device includes a driving device, a central transmission shaft and a scraper. The central transmission shaft and the driving device The output ends are connected, the scraper is fixed on the central drive shaft, the scraper is located inside the mud bucket, and the bottom of the mud bucket is provided with a mud discharge port.

The vertical flow sedimentation tank of the present invention is provided with a mud scraping device in the tank body. During the sewage treatment process, the driving device can drive the central transmission shaft to rotate slowly, and the scraper can scrape the sludge in the mud bucket as the sludge concentration area. Grinding and stirring action increases the fluidity of the sludge, so that the sludge can be continuously and smoothly discharged from the sludge discharge port, avoiding the blockage of the sludge, and has a good sedimentation effect on the sludge, ensuring the continuity and efficiency of sludge discharge. Water purification effect.

Preferably, the mud scraping device includes a plurality of inclined plates, and the plurality of inclined plates are respectively fixedly connected with the central transmission shaft through a plurality of connecting rods, and each of the inclined plates is parallel to the mud bucket. The inner side surface is arranged, and there is a gap between each of the inclined plates and the inner side surface of the mud bucket. The arrangement of the above-mentioned several inclined plates not only ensures the mud scraping effect, but also has a certain diversion effect, which can promote the mud flow to the mud discharge port.

Preferably, an upright center cylinder, a sleeve and a dredging box are fixed in the tank body, the sleeve is sleeved on the outer side of the center cylinder, and the sleeve is connected to the center cylinder. A closed annular cavity is formed, the water inlet and the water outlet are respectively located on the upper part of the pool body, the water inlet is crossed with a water inlet pipe, and the water inlet pipe is connected with the water inlet pipe. The ring cavity is communicated, the lower part of the central cylinder is open, the side wall of the central cylinder is provided with a plurality of through holes, and the inner cavity of the central cylinder is connected to the ring through the plurality of through holes. The cavities communicate with each other, the central cylinder is sleeved on the outer side of the central transmission shaft, the mud dump box is erected above the mud bucket, and the outer side of the mud dump box is connected to the pool. The inner side of the body is surrounded by an annular channel, the upper part of the dump box is open, the lower part of the central drive shaft extends into the mud bucket through the dump box, and the sleeve and the lower part of the center cylinder respectively protrude into the bottom of the mud dump box. When in use, the sewage introduced into the annular cavity from the water inlet pipe enters the inner cavity of the center cylinder through a plurality of through holes and flows continuously from the lower part of the center cylinder. Dump the mud box. Using the principle of gravity, the mud, flocs, colloids, etc. in the sewage are slowly deposited in the middle and lower parts of the mud turning box, and the supernatant overflows from the upper part of the mud turning box and accumulates in the tank. The tank body flows out from the water outlet. With the accumulation of mud, flocs, colloids, etc. in the mud turning box, a "natural filter layer" is formed in the mud turning box, which plays a role in filtering the sewage that continuously enters the mud turning box. Mud and pollutants are filtered and intercepted, which plays a certain role in water purification and improves the efficiency of vertical flow sedimentation of sewage. In the end, as more and more sludge is deposited in the dredging box, the sludge overflows from the upper part of the dredging box, and continuously flows into the mud bucket through the annular channel under the action of its own weight. The central cylinder, the sleeve and the dredging box are used together to make the flow of sewage more concentrated, and the sewage can be introduced into the dredging box in a centralized manner. After natural settlement in the dredging box, the supernatant is discharged first. In the early stage of sewage treatment, the mud-water mixture is the main material in the mud-turning box. As the amount of sludge deposited in the mud-turning box increases, the supernatant first overflows from the upper part of the mud-turning box, and the sludge in the mud-turning box accumulates to a certain amount. It will also overflow from the top of the dump box.

Further, a plurality of first support bars are fixed on the outside of the mud dump box, and the mud dump box is fixed on the bottom of the pool body through the plurality of first support bars. A plurality of second support bars are fixed on the inner side of the mud box, and both ends of each of the second support bars are respectively fixed on the sleeve and the mud dump box. The first support cross bar and the second support cross bar can improve the strength of the dump box and facilitate the installation of the dump box.

Preferably, the lower part of the central cylinder is communicated with a water distribution device, and the water distribution device is suspended in the mud turning box. When in use, the sewage in the central cylinder flows through the water distribution device and enters the turning inside the mudbox. In addition to the function of water distribution, the water distribution device also plays a certain surging effect on the sludge in the mud dump box, so that the excess sludge overflows from the upper part of the mud dump box and falls into the annular channel and the mud bucket to be concentrated. Thereby improving the continuity of sludge discharge.

Further, the water distribution device includes an even number of water distribution pipes arranged horizontally around the central drive shaft, each of the water distribution pipes is provided with a plurality of water distribution holes, and the plurality of water distribution pipes are provided. The water holes are arranged at intervals along the length direction of each of the water distribution pipes to ensure a uniform water distribution effect.

Preferably, as the distance from the central transmission shaft increases gradually, the diameter of the water distribution holes on each of the water distribution pipes gradually increases. In the process of water treatment, sewage flows in from the middle of the dredging box, and the above-mentioned design of water distribution holes with gradually increasing apertures is beneficial to further ensure uniform water distribution.

Preferably, the plurality of water distribution holes are opened at the lower part of each of the water distribution pipes, and the plurality of water distribution holes are symmetrically arranged around the longitudinal section passing through the center line of each of the water distribution pipes, It can also improve the uniformity of water distribution.

Preferably, the tank body is provided with a cylindrical overflow weir, the overflow weir is arranged on the upper part of the inner side of the tank body, and the outer diameter of the overflow weir is smaller than the inner diameter of the tank body, so The outer side of the overflow weir and the inner side of the pool body form an annular water collecting tank with an upper opening, and the water outlet communicates with the water collecting tank. The overflow weir acts as a buffer, which can prevent a large amount of water from rushing to the water outlet and ensure the water treatment effect.

Preferably, the upper edge of the overflow weir is provided with a circle of saw teeth to further buffer.

Compared with the prior art, the present invention has the following advantages: the improved vertical flow sedimentation tank disclosed in the present invention is provided with a mud scraping device in the tank body. The plate can scrape, grind and agitate the sludge in the sludge hopper, which is used as the sludge concentration area, to increase the fluidity of the sludge, so that the sludge can be continuously and smoothly discharged from the sludge discharge port, so as to avoid the sludge blockage and reduce the impact on the sludge. The sedimentation effect is good, ensuring the continuity and efficiency of sludge discharge, and ensuring the effect of water purification.

Description of drawings

Fig. 1 is the structural representation of the improved vertical flow sedimentation tank in the embodiment;

Fig. 2 is a schematic diagram of the size arrangement of the water distribution holes on the water distribution pipe;

Figure 3 is a schematic diagram (top view) of the connection between the water distribution device including two water distribution pipes, the center cylinder and the center drive shaft;

Figure 4 is a schematic diagram (top view) of the connection between the water distribution device including 4 water distribution pipes, the central cylinder and the central drive shaft;

Figure 5 is a schematic diagram (top view) of the connection between the water distribution device including 8 water distribution pipes, the central cylinder and the central transmission shaft;

6 is a schematic cross-sectional view of a water distribution pipe provided with 1 water distribution hole;

7 is a schematic cross-sectional view of a water distribution pipe provided with 3 water distribution holes;

FIG. 8 is a schematic cross-sectional view of a water distribution pipe provided with four water distribution holes.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

The improved vertical flow sedimentation tank of Example 1, as shown in Figure 1, includes a tank body 1, the tank body 1 is provided with a water inlet 11 and a water outlet 12, and the bottom of the The mud bucket 2 and the pool body 1 are provided with a mud scraping device. The mud scraping device includes a driving device 31, a central transmission shaft 3 and a scraper. The central transmission shaft 3 is connected to the output end of the driving device 31. In this embodiment, the driving device 31 adopts a motor, the motor 31 is installed on the top of the pool body 1, the scraper is fixed on the central drive shaft 3, the scraper is located on the inner side of the mud bucket 2, the scraper includes several inclined plates 4, and several inclined plates 4 are respectively connected by several connecting rods. 41 is fixedly connected with the central drive shaft 3, each inclined plate 4 is arranged parallel to the inner side of the mud hopper 2, there is a gap 42 between each inclined plate 4 and the inner side of the mud hopper 2, and the bottom of the mud hopper 2 is provided with a row. Mud port 21, a cylindrical overflow weir 13 is provided in the pool body 1, the overflow weir 13 is arranged on the upper part of the inner side of the pool body 1, the outer diameter of the overflow weir 13 is smaller than the inner diameter of the pool body 1, and the upper edge of the overflow weir 13 is set There is a circle of saw teeth 14, the outer side of the overflow weir 13 and the inner side of the pool body 1 enclose a ring-shaped water collecting tank 15 with an upper opening, and the water outlet 12 is communicated with the water collecting tank 15.

In Example 1, the upright center cylinder 5, the sleeve 6 and the mud dumping box 7 are fixed in the pool body 1, the sleeve 6 is sleeved on the outer side of the center cylinder 5, and the sleeve 6 and the center cylinder 5 form a closed enclosure. The annular cavity 61, the water inlet 11 and the water outlet 12 are respectively located on the upper part of the pool body 1, the water inlet 11 is crossed with the water inlet pipe 16, the water inlet pipe 16 is communicated with the annular cavity 61, the lower part of the central cylinder 5 is open, the central cylinder 5 A plurality of through holes 51 are opened on the side wall of the central cylinder 5, and the inner cavity of the central cylinder 5 is communicated with the annular cavity 61 through the plurality of through holes 51. Above the bucket 2, the outer side of the dump box 7 and the inner side of the tank body 1 form an annular channel 17, the upper part of the dump box 7 is open, and the lower part of the central drive shaft 3 extends through the dump box 7 into the mud bucket. 2, the lower parts of the sleeve 6 and the center cylinder 5 respectively protrude into the bottom of the dredging box 7.

In Embodiment 1, a number of first support bars 71 are fixed on the outside of the dump box 7, the dump box 7 is fixed on the bottom of the pool body 1 through a number of first support bars 71, and a number of first support bars 71 are fixed on the inside of the dump box 7. The second support cross bars 72 are respectively fixed on the sleeve 6 and the mud dump box 7 at both ends of each second support cross bar 72 .

The difference between the improved vertical flow sedimentation tank of Example 2 and Example 1 is that, in Example 2, the lower part of the central cylinder 5 is communicated with a water distribution device, and the water distribution device is suspended in the mud turning box 7, using At this time, the sewage in the center cylinder 5 flows through the water distribution device into the mud dumping box 7 .

In Embodiment 2, the water distribution device includes an even number of water distribution pipes 8 arranged horizontally around the central drive shaft 3, each water distribution pipe 8 is provided with a plurality of water distribution holes 81, and the plurality of water distribution holes 81 are arranged along each water distribution hole 81. The length direction of the water distribution pipe 8 is arranged at intervals; a plurality of water distribution holes 81 are opened in the lower part of each water distribution pipe 8, and a plurality of water distribution holes 81 are arranged symmetrically with the longitudinal section passing through the center line of each water distribution pipe 8; The distance from the central transmission shaft 3 gradually increases, and the diameter of the water distribution holes 81 on each water distribution pipe 8 gradually increases, as shown in FIG. 2 .

In Embodiment 2, the number of water distribution pipes 8 is an even number, which can be 2 (as shown in FIG. 3 ), 4 (as shown in FIG. 4 ), 8 (as shown in FIG. 5 ) or other even numbers. The number of water distribution holes 81 arranged symmetrically with the longitudinal section of the center line of each water distribution pipe 8 as the center can be 1 row (as shown in Figure 6), 3 rows (as shown in Figure 7), and 4 rows (as shown in Figure 7). 8) or other row numbers.

When sewage is treated with the improved vertical flow sedimentation tank of Example 2, the sewage introduced into the annular cavity 61 from the water inlet pipe 16 enters the inner cavity of the center cylinder 5 through the plurality of through holes 51 and continuously enters the water distribution from the lower part of the center cylinder 5. The device flows into the mud dump box 7 through the water distribution hole 81 . Using the principle of gravity, the mud, flocs, colloids, etc. in the sewage are slowly deposited in the middle and lower parts of the mud turning box 7, and the supernatant overflows from the upper part of the mud turning box 7 and accumulates in the pool body 1, with the water level in the pool body 1. Continuously rising, the water finally flows out of the pool from the water outlet 12 . With the accumulation of mud, flocs, colloids, etc. in the mud turning box 7, a "natural filter layer" is formed in the mud turning box 7, which can filter the sewage that continuously enters the mud turning box 7. Therefore, the sludge in the mud dumping box 7 also plays a certain role in water purification, which improves the efficiency of vertical flow sedimentation of sewage. Eventually, as more and more sludge is deposited in the mud dump box 7 , the sludge overflows from the upper part of the mud dump box 7 , and continuously flows into the mud bucket 2 through the annular channel 17 under the action of its own weight.

In the initial stage of sewage treatment, the mud-water mixture is mainly in the mud-turning box 7. As the amount of sludge deposited in the mud-turning box 7 increases, the supernatant overflows from the upper part of the mud-turning box 7 first, while the sludge in the mud-turning box 7 overflows. When accumulated to a certain amount, it will overflow from the upper part of the dump box 7 . The sludge in the mud dumping box 7 is essentially a mixture of mud, flocs, colloids, etc. With the progress of sewage treatment, the mixture forms a natural filter layer, which plays a role in filtering the sewage that continuously enters the mud dumping box 7. , to filter and intercept mud and pollutants, and play a certain role in water purification. With the progress of water treatment, water accumulates in the pool 1, the water level in the pool 1 rises continuously, the water overflows from the overflow weir 13, enters the water collecting tank 15, and finally flows out of the pool 1 from the water outlet 12, while the overflowing water flows out of the pool 1. Under the action of its own weight, the sludge continuously flows into the mud bucket 2 through the annular channel 17 to be concentrated and finally discharged from the mud discharge port 21 . The arrows in Figure 1 show the flow routing.

In the process of sewage treatment, the driving device 31 drives the central transmission shaft 3 to rotate slowly, and the scraper can scrape, grind and stir the sludge in the sludge hopper 2 as the sludge concentration area, so as to increase the fluidity of the sludge and make the sludge thicker. The mud can be continuously and smoothly discharged from the mud discharge port 21, so as to avoid the sludge blockage, and the sludge precipitation effect is good.

In addition to the water distribution function of the water distribution device, it also has a certain surging effect on the sludge in the mud dump box 7, so that the excess sludge overflows from the upper part of the mud dump box 7 and falls into the annular channel 17 and the mud bucket 2. The inside is concentrated, thereby improving the continuity of sludge discharge.

Claims (10)

1. an improved vertical flow sedimentation tank comprises a pond body, the described pond body is provided with a water inlet and a water outlet, and the bottom of the described pond body is provided with a large and small conical mud hopper, which is characterized by: In the tank body, a mud scraping device is provided, and the mud scraping device includes a driving device, a central transmission shaft and a scraper, and the central transmission shaft is connected with the output end of the driving device. The scraper is fixed on the central drive shaft, the scraper is located on the inner side of the mud bucket, and the bottom of the mud bucket is provided with a mud discharge port. 2. An improved vertical flow sedimentation tank according to claim 1, characterized in that, the scraper comprises several inclined plates, and the several inclined plates are connected to the central drive shaft through several connecting rods respectively. For fixed connection, each of the inclined plates is arranged parallel to the inner side of the mud bucket, and there is a gap between each of the inclined plates and the inner side of the mud bucket. 3. A kind of improved vertical flow sedimentation tank according to claim 1, is characterized in that, described tank body is fixed with upright center cylinder, sleeve and dump box, and described sleeve is sleeved on On the outer side of the central cylinder, the sleeve and the central cylinder form a closed annular cavity, the water inlet and the water outlet are respectively located on the upper part of the pool body, the There is a water inlet pipe across the water inlet, the water inlet pipe is communicated with the annular cavity, the lower part of the central cylinder is open, the side wall of the central cylinder is provided with a plurality of through holes, the The inner cavity of the central cylinder is communicated with the annular cavity through the plurality of through holes, the central cylinder is sleeved on the outer side of the central transmission shaft, and the mud dumping box is erected on the Above the mud bucket, the outer side of the mud dump box and the inner side of the pool body form an annular channel, the upper part of the mud dump box is open, and the lower part of the central drive shaft passes through the The dredging box extends into the mud bucket, and the lower parts of the sleeve and the center cylinder respectively protrude into the bottom of the dredging box. 4. An improved vertical flow sedimentation tank according to claim 3, characterized in that, a plurality of first support bars are fixed on the outer side of the mud dump box, and the mud dump box passes through the plurality of first support bars. The first support crossbar is fixed on the bottom of the pool body, the inner side of the mud dump box is fixed with a plurality of second support crossbars, and the two ends of each second support crossbar are respectively fixed on the on the sleeve and the said dump box. 5. an improved vertical flow sedimentation tank according to claim 3, is characterized in that, the lower part of described central cylinder is communicated with a water distribution device, and described water distribution device is suspended in the described turning In the mud box, when in use, the sewage in the center cylinder flows through the water distribution device into the mud dump box. 6. An improved vertical flow sedimentation tank according to claim 5, wherein the water distribution device comprises an even number of water distribution pipes arranged horizontally centered on the central drive shaft, and each The water distribution pipes are provided with a plurality of water distribution holes, and the plurality of water distribution holes are arranged at intervals along the length direction of each of the water distribution pipes. 7. A kind of improved vertical flow sedimentation tank according to claim 6, is characterized in that, along with the distance from described central drive shaft increases gradually, the water distribution hole on each described water distribution pipe The pore size gradually increases. 8. An improved vertical flow sedimentation tank according to claim 6, wherein the plurality of water distribution holes are provided at the bottom of each of the water distribution pipes, and the plurality of water distribution holes are provided at the bottom of each of the water distribution pipes. It is symmetrically arranged with the longitudinal section passing through the center line of each water distribution pipe as the center. 9. an improved vertical flow sedimentation tank according to claim 1, is characterized in that, described tank body is provided with cylindrical overflow weir, and described overflow weir is arranged on the upper part of described tank body inner side , the outer diameter of the overflow weir is smaller than the inner diameter of the pond body, the outer side of the overflow weir and the inner side of the pond body form a ring-shaped sump with an upper opening, the outlet The water outlet communicates with the water collecting tank. 10 . The improved vertical flow sedimentation tank according to claim 9 , wherein a circle of saw teeth is arranged on the upper edge of the overflow weir. 11 .

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