Up-flow sewage sedimentation tank

Abstract

The utility model provides an up-flow type sewage sedimentation tank which comprises a sedimentation tank main body, the sedimentation tank main body comprises a mixing zone, a reaction zone and an energy release sedimentation zone which are sequentially separated from bottom to top and communicated, a water distribution channel is arranged on one side in the mixing zone, and a first sludge discharge device is arranged at the bottom of the mixing zone; a first aeration device is arranged in the mixing area, a second aeration device is arranged in the reaction area, the energy release settling area comprises an energy release area and an inclined tube settling area which are sequentially communicated from left to right, the inclined tube settling area comprises an inclined tube filler part and a water collecting tank arranged above the inclined tube filler part, and a second sludge discharge device is arranged at the bottom of the inclined tube settling area. The second sludge discharge device comprises a sludge return pipe; the sludge return pipe is communicated with the mixing area. The up-flow sewage sedimentation tank disclosed by the utility model has the advantages of small occupied area, strong water quality impact resistance, good sedimentation separation effect, low energy consumption and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an upflow type sewage sedimentation tank. Background Art

[0002] Sedimentation tank is a kind of structure that uses sedimentation to remove suspended matter in water and is a device for purifying water. Suspended matter in water is removed by natural sedimentation or coagulation sedimentation. Sedimentation tanks are divided into horizontal sedimentation tanks and vertical sedimentation tanks according to the direction of water flow, including horizontal flow sedimentation tanks, radial flow sedimentation tanks, inclined tube / inclined plate sedimentation tanks and vertical flow sedimentation tanks. Among them, horizontal flow sedimentation tanks and radial flow sedimentation tanks have good sedimentation effect and strong impact resistance, but generally occupy a large area and are not easy to distribute water evenly; inclined tube / inclined plate sedimentation tanks are more complicated to discharge mud. Compared with the other three types of sedimentation tanks, vertical flow sedimentation tanks have the advantages of small footprint, simple structure, and convenient operation and maintenance, and are widely used in sewage treatment. However, the sewage inlet of most existing vertical flow sedimentation tanks is directly in contact with the sedimentation area, resulting in poor resistance to water quality impact. If the inlet water quality fluctuates greatly, it will affect its sedimentation and separation effect.

[0003] Therefore, an upflow sewage sedimentation tank is urgently needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide an upflow sewage sedimentation tank, which has the advantages of small footprint, strong resistance to water quality impact, good sedimentation and separation effect, low energy consumption, etc.

[0005] To achieve the above-mentioned purpose, the utility model provides an upflow sewage sedimentation tank, including a sedimentation tank main body, the sedimentation tank main body including a mixing zone, a reaction zone and an energy release sedimentation zone which are separated and connected in sequence from bottom to top, a water distribution channel is arranged on one side of the interior of the mixing zone, a first mud discharge device is arranged at the bottom of the mixing zone, a first aeration device is arranged inside the mixing zone, a second aeration device is arranged inside the reaction zone, the energy release sedimentation zone includes an energy release zone and an inclined tube sedimentation zone which are connected in sequence from left to right, the inclined tube sedimentation zone includes an inclined tube filling part and a water collecting trough arranged above the inclined tube filling part, a second mud discharge device is arranged at the bottom of the inclined tube sedimentation zone, the second mud discharge device includes a sludge return pipe, and the sludge return pipe is connected to the mixing zone.

[0006] Compared with the prior art, the utility model's upflow sewage sedimentation tank includes a mixing zone, a reaction zone, and an energy-releasing sedimentation zone, and the mixing zone, the reaction zone, and the energy-releasing sedimentation zone are connected from bottom to top, so that the utility model's sewage sedimentation tank has the characteristic of small footprint. The sewage to be treated enters the mixing zone through a water distribution channel arranged on one side of the mixing zone, and then flows up to the reaction zone and the energy-releasing sedimentation zone in turn, with small head loss, thereby improving the sedimentation efficiency, and the sewage is treated from bottom to top, so that during the treatment process, the sludge can be better deposited under its own gravity, and the inclined tube sedimentation zone is provided with a sludge return pipe connected to the mixing zone, so that the sludge generated in the inclined tube sedimentation zone can be returned to the mixing zone only by its own weight without the need for other power, and the returned sludge can continue to react with the newly entered sewage to be treated in the mixing zone, thereby improving the use efficiency of the agent. In summary, the upflow sewage sedimentation tank of the utility model has the characteristics of small footprint, good sedimentation and separation effect, strong resistance to water quality impact, low chemical usage and high efficiency, less equipment configuration, and low energy consumption, and can further reduce the cost of sewage treatment.

[0007] Preferably, a water inlet pipe connected to the water distribution channel is provided outside the mixing zone, and the water inlet pipe is provided with a first dosing point and a pipeline mixer in sequence along the water flow direction.

[0008] Preferably, a water distribution hole is provided on a side of the water distribution channel away from the side wall of the mixing zone.

[0009] Preferably, the reaction zone is provided with a second dosing pipe, and the second dosing pipe is provided with a second dosing point.

[0010] Preferably, the first aeration device comprises a first perforated aeration tube, the second aeration device comprises a second perforated aeration tube, and the first perforated aeration tube and the second perforated aeration tube are both connected to a blower.

[0011] Preferably, the mixing zone and the reaction zone are separated by a first baffle, the first baffle leaves space for circulation between the mixing zone and the reaction zone, the reaction zone and the energy release sedimentation zone are separated by a second baffle, the second baffle leaves space for circulation between the reaction zone and the energy release sedimentation zone, the energy release zone and the inclined tube sedimentation zone are separated by a third baffle, the third baffle leaves space for circulation between the energy release zone and the inclined tube sedimentation zone.

[0012] Preferably, a plurality of the water collecting grooves are provided, and the plurality of the water collecting grooves are arranged at intervals above the inclined tube filling portion.

[0013] Preferably, the energy release area is provided with a plurality of energy release parts, and the plurality of energy release parts are connected in sequence.

[0014] Preferably, the first mud discharge device includes a first mud discharge pipe connected to the bottom of the mixing zone, and a first mud discharge valve and a mud discharge pump are sequentially arranged on the mud discharge pipe along the sludge discharge direction; the second mud discharge device also includes a second mud discharge pipe connected to the bottom of the inclined tube sedimentation zone, and a second mud discharge valve is arranged on the second mud discharge pipe; and a sludge return valve is arranged on the sludge return pipe.

[0015] Preferably, the water outlet end of the water collecting tank is connected to a water outlet channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of an upflow sewage sedimentation tank of the utility model;

[0017] Figure 2 It is a plan view of the mixing zone of the utility model;

[0018] Figure 3 It is a plan view of the reaction zone of the utility model;

[0019] Figure 4 It is a plan view of the energy release precipitation area of ​​the utility model;

[0020] Figure 5 It is a schematic diagram of one side of the water distribution channel including the water distribution hole of the utility model.

[0021] Component symbol description: 1000- sedimentation tank body, 100- mixing zone, 10- first baffle, 11- water distribution channel, 111- water distribution hole, 12- first mud discharge device, 121- first mud discharge pipe, 122- first mud discharge valve, 123- mud discharge pump, 13- first aeration device, 131- first perforated aeration pipe, 14- water inlet pipe, 141- first dosing point, 142- pipeline mixer, 143- water inlet valve, 200- reaction zone, 20- second baffle, 21- second aeration device, 211- second perforated aeration pipe, 22- The second dosing point, 221-dosing main pipe, 222-dosing branch pipe, 23-blower, 231-first control valve, 232-second control valve, 300-energy release sedimentation area, 30-third baffle, 31-energy release area, 311-first energy release part, 312-second energy release part, 32-inclined tube sedimentation area, 321-inclined tube sedimentation part, 322-water collecting tank, 323-second mud discharge device, 3231-sludge return pipe, 3232-sludge return valve, 3233-second mud discharge pipe, 3234-second mud discharge valve, 324-outlet channel. DETAILED DESCRIPTION

[0022] In order to better illustrate the purpose, technical solution and beneficial effects of the utility model, the utility model will be further described below in conjunction with the accompanying drawings. It should be noted that the embodiments described below are only part of the embodiments of the utility model, not all of them.

[0023] Please refer to Figure 1 The utility model provides an upflow sewage sedimentation tank, including a sedimentation tank body 1000, the sedimentation tank body 1000 includes a mixing zone 100, a reaction zone 200 and an energy release sedimentation zone 300 which are sequentially separated and connected from bottom to top.

[0024] Combination Figure 1 , Figure 2 and Figure 5 As shown, the mixing zone 100 includes a water distribution channel 11, a first mud discharge device 12 and a first aeration device 13. The water distribution channel 11 is arranged on one side of the interior of the mixing zone 100, and the sewage to be treated enters the interior of the sedimentation tank body 1000 through the water distribution channel 11 for treatment. The mud discharge device 12 is arranged at the bottom of the mixing zone 100, and is used to discharge the precipitated sludge to the outside of the sedimentation tank body 1000. The first aeration device 13 is arranged inside the mixing zone 100, and is used to aerate the sewage in the mixing zone 100 to accelerate the reaction treatment rate.

[0025] A water distribution hole 111 is provided on the side of the water distribution channel 11 away from the side wall of the mixing zone. Furthermore, in the present embodiment, a plurality of water distribution holes 111 are provided, and the plurality of water distribution holes 111 are evenly arranged on the side of the water distribution channel 11 away from the side wall of the mixing zone 100, so that the sewage can evenly enter the mixing zone 100, which reduces the impact of the hydraulic force on the main body of the sedimentation tank, thereby improving the hydraulic impact resistance of the sedimentation tank of the utility model, and can obtain a better treatment effect. An inlet pipe 14 connected to the water distribution channel 11 is provided on the outside of the mixing zone 100, and the water inlet pipe 14 is sequentially provided with a first dosing point 141 and a pipeline mixer 142 along the water flow direction. The first dosing point 141 is used to add a coagulant, and the coagulant can be polyaluminum chloride (PAC) or polyferric chloride. The pipeline mixer 142 can evenly mix the added coagulant with the sewage to be treated to improve the treatment effect. The water outlet end of the pipeline mixer 142 is also provided with a water inlet valve 143 to control the inflow of sewage in the water inlet pipe.

[0026] like Figure 2As shown, the first mud discharge device 12 includes a first mud discharge pipe 121 connected to the bottom of the reaction zone 100, and a first mud discharge valve 122 and a mud discharge pump 123 are sequentially arranged on the first mud discharge pipe 121 along the sludge discharge direction. When the amount of sludge at the bottom of the mixing zone 100 reaches the discharge requirement, the first mud discharge valve 122 is first opened, and then the mud discharge pump 123 is opened. Under the action of the mud discharge pump 123, the sludge is discharged through the first mud discharge pipe 121 to the sludge dewatering system (not shown in the figure) outside the sedimentation tank body 1000 for further treatment. The first aeration device 13 includes a first perforated aeration tube 131. In the present embodiment, a plurality of first perforated aeration tubes 131 are provided, and the plurality of first perforated aeration tubes 131 are evenly arranged at the bottom of the mixing zone 100. The first perforated aeration tubes 131 are connected to the blower 23. The blower transmits gas to the sewage in the reaction zone through the first perforated aeration tubes to increase the water dynamics, thereby accelerating the formation of flocs between the reagent and the suspended and colloidal particles in the sewage, improving the sedimentation separation effect, and thus achieving the effect of purifying the water body.

[0027] Combination Figure 1 and Figure 3 As shown, the reaction zone 200 includes a second aeration device 21, a second dosing pipe (not shown) and a second dosing point 22. The second aeration device 21 is arranged inside the reaction zone 200, and the second aeration device 21 includes a second perforated aeration pipe 211. In this embodiment, a plurality of second perforated aeration pipes 211 are arranged, and the plurality of second perforated aeration pipes 211 are evenly arranged at the bottom of the reaction zone 200. The second perforated aeration pipe 211 is connected to the blower 23. A first control valve 231 is arranged between the blower 23 and the first perforated aeration pipe 131, and a second control valve 232 is arranged between the blower 23 and the second perforated aeration pipe 211. The reaction rates of the mixing zone 100 and the reaction zone 200 can be adjusted by controlling the opening and closing degrees of the first control valve 231 and the second control valve 232 to meet different processing requirements. The second dosing point 22 is arranged on the second dosing pipe for adding flocculant. The second dosing pipeline includes a dosing main pipe 221 and a plurality of dosing branch pipes 222 connected to the dosing main pipe 221. The dosing main pipe 221 is arranged outside the sedimentation tank body 1000, and the dosing branch pipes 222 are evenly distributed in the reaction zone 200. The second dosing point 22 is arranged on the dosing main pipe 221. Such a setting can make the flocculant evenly dispersed in the reaction zone 200, so as to improve the treatment efficiency of the flocculant, thereby improving the sewage treatment effect.

[0028] Combination Figure 1 and Figure 4As shown, the energy release sedimentation zone 300 includes an energy release zone 31 and an oblique tube sedimentation zone 32 which are connected in sequence from left to right. The energy release zone 31 is used to release the aeration energy of the sewage entering through the reaction zone 200, so as to prevent the oblique tube sedimentation zone 32 from being disturbed, thereby improving the sedimentation efficiency. The energy release zone 31 is provided with a plurality of energy release parts, which are connected in sequence. The provision of a plurality of energy release parts can further enhance the aeration energy release effect of the sewage, thereby further improving the sedimentation efficiency. In this embodiment, the energy release zone 31 is provided with two energy release parts, namely, a first energy release part 311 and a second energy release part 312, which are separated by a fourth baffle (not shown in the figure), and the fourth baffle leaves a space for the first energy release part 311 and the second energy release part 312 to communicate. The sewage in the reaction zone 200 first flows into the first energy release part 311 to release the aeration energy, then flows into the second energy release part 312 to further release the energy, and finally flows into the oblique tube sedimentation zone 32.

[0029] Continue to combine Figure 1 and Figure 4 The inclined tube sedimentation area 32 includes an inclined tube filling part 321, a water collecting tank 322 and a second mud discharge device 323. The inclined tube filling part 321 includes an inclined tube filling (not shown in the figure). After the sewage entering the energy release area 31 is precipitated by the inclined tube filling part 321, the sludge and other impurities are deposited below the inclined tube sedimentation area 32. The water collecting tank 322 is arranged above the inclined tube filling part 321, and the clean water above the inclined tube filling part 321 enters the water collecting tank 322 for collection. In the utility model, a plurality of water collecting tanks 322 are provided, and a plurality of water collecting tanks 322 are arranged at intervals above the inclined tube filling part 321 to speed up the collection of clean water above and further improve the efficiency of sewage treatment. The outlet end of the water collecting tank 322 is provided with an outlet channel 324, and the clean water collected by the water collecting tank 322 enters the outlet channel 324 and is discharged outside the sedimentation tank body 1000 for the next step of treatment.

[0030] The second mud discharge device 323 is arranged at the bottom of the inclined tube sedimentation area 32, and the second mud discharge device 323 includes a mud return pipe 3231, and a mud return valve 3232 is arranged on the mud return pipe 3231. The second mud discharge device 323 also includes a second mud discharge pipe 3233 and a second mud discharge valve 3234 arranged on the second mud discharge pipe 3233. Therefore, the second mud discharge device 323 can return the sludge at the bottom of the inclined tube sedimentation area 32 to the mixing area 100 to continue to participate in the sewage treatment reaction according to the operation and treatment situation of the sedimentation tank body 1000, further increase the flocs in the mixing area, and improve the use efficiency of the coagulant and other agents to reduce the use of the agents. When sludge return is not required, the sludge can be discharged to the sludge dewatering system (not shown in the figure) outside the sedimentation tank main body 1000 through the second sludge discharge pipe 3233 and the second sludge discharge valve 3234 for treatment. In this embodiment, 30-50% of the sludge generated in the inclined tube sedimentation area flows to the mixing area, and 50-100% flows to the sludge dewatering system.

[0031] like Figure 1 As shown, the mixing zone 100 and the reaction zone 200 are separated by a first baffle 10, and the first baffle 10 leaves a space for the mixing zone 100 and the reaction zone 200 to circulate. The reaction zone 200 and the energy release sedimentation zone 300 are separated by a second baffle 20, and the second baffle 20 leaves a space for the reaction zone 200 and the energy release sedimentation zone 300 to circulate. The energy release zone 31 and the inclined tube sedimentation zone 32 are separated by a third baffle 30, and the third baffle 30 leaves a space for the energy release zone 31 and the inclined tube sedimentation zone 32 to circulate. In this embodiment, the circulation space left by the first baffle 10 is set on the side opposite to the water inlet channel 11, and the circulation space left by the second baffle 20 is set on the other side of the circulation space left by the first baffle 10. That is, the circulation space of the first baffle 10 and the circulation space of the second baffle 20 are staggered, which can increase the residence time of sewage in the mixing zone 100 and the reaction zone 200, so as to obtain more sufficient treatment, thereby improving the sewage treatment effect.

[0032] Combination Figure 1 to Figure 5As shown, when the upflow sewage sedimentation tank of the utility model is used, firstly, coagulants and other agents are added at the first dosing point 141, and the sewage enters through the water inlet pipe 14 and is mixed evenly with the coagulant in the pipeline mixer 142, and then enters the water distribution channel 11 in the mixing zone 100, and enters the mixing zone 100 through the water distribution holes 111 evenly arranged in the water distribution channel 11. Under the action of the first perforated aeration pipe 131, the sewage, coagulant and sludge are continuously mixed and reacted. The sewage treated in the mixing zone 100 flows up to the reaction zone 200 through the first baffle 10, and continues to react under the action of the second perforated aeration plate 211. The reaction zone 200 is also provided with a second dosing point 22, and flocculants are added to further increase the flocs and accelerate the coagulation and sedimentation of suspended matter and colloids. The sewage treated in the reaction zone 200 continues to flow up to the energy release zone 31 through the second baffle 20, and then enters the inclined tube sedimentation zone 32 through the third baffle 30 after energy release treatment in the first energy release part 311 and the second energy release part 312. The sewage is precipitated in the inclined tube filler part 321 of the inclined tube sedimentation zone 32, and impurities such as sludge are deposited at the bottom of the inclined tube sedimentation zone 32. The sludge can be returned to the mixing zone 100 by its own gravity through the sludge return pipe 3231 set at the bottom of the inclined tube sedimentation zone 32, and continue to participate in the reaction to reduce the amount of reagents used and improve the treatment efficiency. The sludge can also be discharged to the sewage dewatering system through the second sludge discharge pipe 3233 and the second sludge discharge valve 3234. The clean water enters the water collection tank 322 set above the inclined tube sedimentation part 321 for collection, and enters the outlet channel 324 set at the outlet end of the water collection tank 322 for the next step of treatment. When the amount of sludge in the mixing zone reaches the discharge requirement, the first sludge discharge valve 122 is opened first, and then the sludge discharge pump 123 is opened. The sludge at the bottom of the mixing zone 100 enters the sludge dewatering system through the first sludge discharge pipe 121 for further treatment under the action of the sludge discharge pump 123.

[0033] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. An upflow sewage sedimentation tank, comprising a sedimentation tank body, characterized in that: The main body of the sedimentation tank includes a mixing zone, a reaction zone and an energy release sedimentation zone which are separated and connected in sequence from bottom to top. A water distribution channel is arranged on one side of the interior of the mixing zone. A first mud discharge device is arranged at the bottom of the mixing zone. A first aeration device is arranged inside the mixing zone. A second aeration device is arranged inside the reaction zone. The energy release sedimentation zone includes an energy release zone and an inclined tube sedimentation zone which are connected in sequence from left to right. The inclined tube sedimentation zone includes an inclined tube filling part and a water collecting tank arranged above the inclined tube filling part. A second mud discharge device is arranged at the bottom of the inclined tube sedimentation zone. The second mud discharge device includes a sludge return pipe, and the sludge return pipe is connected to the mixing zone.

2. The upflow sewage sedimentation tank according to claim 1, characterized in that: A water inlet pipe connected to the water distribution channel is arranged outside the mixing zone, and the water inlet pipe is sequentially provided with a first dosing point and a pipeline mixer along the water flow direction.

3. The upflow sewage sedimentation tank according to claim 1, characterized in that: A water distribution hole is arranged on one side of the water distribution channel away from the side wall of the mixing zone.

4. The upflow sewage sedimentation tank according to claim 1, characterized in that: The reaction zone is provided with a second dosing tube, and the second dosing tube is provided with a second dosing point.

5. The upflow sewage sedimentation tank according to claim 1, characterized in that: The first aeration device includes a first perforated aeration tube, and the second aeration device includes a second perforated aeration tube. Both the first perforated aeration tube and the second perforated aeration tube are connected to a blower.

6. The upflow sewage sedimentation tank according to claim 1, characterized in that: The mixing zone and the reaction zone are separated by a first baffle, and the first baffle leaves a space for circulation between the mixing zone and the reaction zone. The reaction zone and the energy release sedimentation zone are separated by a second baffle, and the second baffle leaves a space for circulation between the reaction zone and the energy release sedimentation zone. The energy release zone and the inclined tube sedimentation zone are separated by a third baffle, and the third baffle leaves a space for circulation between the energy release zone and the inclined tube sedimentation zone.

7. The upflow sewage sedimentation tank according to claim 1, characterized in that: The water collecting grooves are provided in plurality, and the plurality of water collecting grooves are arranged above the inclined tube filling part at intervals.

8. The upflow sewage sedimentation tank according to claim 1, characterized in that: The energy release area is provided with a plurality of energy release parts, and the plurality of energy release parts are connected in sequence.

9. The upflow sewage sedimentation tank according to claim 1, characterized in that: The first mud discharge device includes a first mud discharge pipe connected to the bottom of the mixing zone, and a first mud discharge valve and a mud discharge pump are sequentially arranged on the first mud discharge pipe along the sludge discharge direction. The second mud discharge device also includes a second mud discharge pipe connected to the bottom of the inclined tube sedimentation zone, and a second mud discharge valve is arranged on the second mud discharge pipe. The sludge return pipe is provided with a sludge return valve.

10. The upflow sewage sedimentation tank according to claim 1, characterized in that: The water outlet end of the water collecting tank is connected with a water outlet channel.

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