CN213570041U - Domestic sewage phosphorus removal device - Google Patents
Domestic sewage phosphorus removal device Download PDFInfo
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- CN213570041U CN213570041U CN202022515702.7U CN202022515702U CN213570041U CN 213570041 U CN213570041 U CN 213570041U CN 202022515702 U CN202022515702 U CN 202022515702U CN 213570041 U CN213570041 U CN 213570041U
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Abstract
The utility model discloses a domestic sewage dephosphorization device, which comprises an aeration tank, a secondary sedimentation tank, a water pipe, a PAC dosing tank and a PAM dosing tank; the water pipe gets into two heavy ponds by the aeration tank, the water inlet of water pipe is located in the aeration tank, the delivery port of water pipe is located two heavy ponds, and the height of delivery port is less than the water inlet, and the delivery port is vertical upwards, along the rivers direction, PAC dosing tank PAM dosing tank loop through the pipeline and is located the water pipe intercommunication in two heavy ponds, PAC dosing tank PAM dosing tank height is higher than two heavy ponds. The utility model has the advantages that: through the improvement of chemistry, structure, the total phosphorus of getting rid of aquatic that can be fine makes the total phosphorus of play water reduce to about 0.2mg/L from about 1.5mg/L, and the mud granule deposits sooner, and adds the medicine and makes the granule flocculent bigger, and the proportion is heavier, and the effect is more effective than the single mode, has reached the environmental protection and has discharged the requirement to sewage.
Description
Technical Field
The utility model relates to a phosphorus removal device, in particular to a domestic sewage phosphorus removal device.
Background
Research tests show that the bacteria can not obtain sufficient nutrition due to low COD (chemical oxygen demand) concentration of the domestic sewage inlet water for a long time, so that the self activity of the bacteria is very low, the total phosphorus in the domestic sewage can not be effectively removed, and the total phosphorus in the outlet water exceeds the standard for a long time. The COD of the domestic sewage inlet water is only about 80-100mg/L, the total phosphorus inlet water concentration is about 5mg/L generally, the perfect nutrition proportion of carbon to phosphorus of bacteria theoretically is 100:1, which is equivalent to 5mg/L of total phosphorus needing COD500mg/L, the actual inlet water is only about 80-100mg/L, and the carbon source is seriously insufficient, which brings great difficulty to the stable growth of the bacteria, particularly, the removal rate of the phosphorus is too low and is only about 70%, so that the total phosphorus of the outlet water of a finished product pool is still about 1.5mg/L, the environment-friendly discharge requirement is only 0.5mg/L, and the removal efficiency of the bacteria to organic matters is influenced due to the long-term shortage of the carbon source, and the total phosphorus of the outlet water of the domestic sewage is always overproof.
The phosphorus in the domestic sewage is mainly derived from human excrement (excrement and urine), food residues and phosphorus-containing detergent. It is seen from the total phosphorus source that it is somewhat impractical to reduce the total phosphorus from the total phosphorus source, and therefore phosphorus removal can only be achieved by increasing the biological phosphorus removal efficiency. In order to improve the phosphorus removal efficiency, the bacterial activity of the biochemical pond needs to be increased, and a carbon source (flour and glucose) needs to be supplemented, so that the cost is invisibly and greatly increased, the operation is complicated, and the proportion of carbon, nitrogen and phosphorus needs to be adjusted.
In response to this situation, a large number of investigations and tests have been conducted on the comprehensive class. Through research, the total phosphorus in the sewage exists in the water mainly in the form of phosphate, and the phosphate exists in 2 states mainly, one is orthophosphate which is soluble in water, and the other is insoluble in water and is mainly adsorbed on solid particles; at present, biological phosphorus removal and/or chemical phosphorus removal are mostly adopted.
A structure for treating sewage by an activated sludge process in an aeration tank (aeration basin). A certain sewage retention time is provided in the tank, so that the oxygen quantity required by aerobic microorganisms and the mixing condition of full contact of sewage and activated sludge are met. The aeration tank mainly comprises a tank body, an aeration system and a water inlet and a water outlet. The tank body is generally made of reinforced concrete, and the planar shape of the tank body is rectangular, square, circular and the like.
The current aeration tank effluent is horizontal flow effluent, namely, the effluent directly enters a secondary sedimentation tank from the aeration tank, particles are in natural sedimentation, clear water flows from the water flow direction, the influent water basically continuously enters water, the specific gravity of the particles is too light, the particles possibly do not settle down in many times, the influent water at the rear end flows through the particles, the sediment is scattered or floated by the influent water, the sedimentation effect of the horizontal flow influent water mode is unsatisfactory, and the effluent sediment contains a large amount of total phosphorus, so that the total phosphorus in the effluent exceeds the standard.
As in application No.: 203320636716.1-A sewage dephosphorization device for livestock and poultry farm, comprising a biochemical reaction tank, and is characterized by also comprising a flocculation reaction tank and a filter tank, wherein one end of the flocculation reaction tank is connected with the biochemical reaction tank, and the other end is connected with the filter tank; be provided with charge device on the flocculation reaction tank, the flocculation reaction tank is including the lime reaction tank, PAC reaction tank, the PAM reaction tank that connect gradually. However, this application adopts a horizontal flow type, and has a problem that the precipitation effect is not understood.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve lies in: how to solve the problem that the existing phosphorus removal device has unsatisfactory precipitation effect, so that the effluent water has phosphorus-containing precipitates, and the total phosphorus of the effluent water exceeds the standard.
The utility model discloses a following technical means realizes solving above-mentioned technical problem:
the domestic sewage dephosphorization device comprises an aeration tank, a secondary sedimentation tank, a water pipe, a PAC dosing tank and a PAM dosing tank; the water pipe gets into two heavy ponds by the aeration tank, the water inlet of water pipe is located in the aeration tank, the delivery port of water pipe is located two heavy ponds, and the height of delivery port is less than the water inlet, and the delivery port is vertical upwards, along the rivers direction, PAC dosing tank PAM dosing tank loop through the pipeline and is located the water pipe intercommunication in two heavy ponds, PAC dosing tank PAM dosing tank height is higher than two heavy ponds.
The utility model discloses in, sewage gets into through the water pipe in the aeration tank, goes down to two heavy ponds, puts into PAC (polyaluminium chloride) in the PAC dosing tank, adds PAM (polyacrylamide) in the PAM dosing tank, throws polyaluminium chloride through the PAC dosing tank in the water pipe in two heavy ponds, not only contains a large amount of aluminium ions in the PAC, and self still has the effect of flocculation, and its and orthophosphate's reaction formula as follows: al (Al)3++PO4 3-→AlPO4And ↓, the formed precipitate is discharged to a coal slime pool through sludge discharge to achieve the effect of phosphorus removal, and the PAC has good flocculation effect, so that particles in water can be further flocculated, the particles in water become large, the specific gravity becomes heavy, not only soluble phosphate is removed, but also insoluble phosphate is removed to achieve the effect of phosphorus removal, polyacrylamide is added at the back end of the PAC, and the PAM is an organic polymer flocculant which mainly enables solid particles to become large and accelerate precipitation; the height of water outlet is lower than the height of water inlet, in the secondary sedimentation tank, when the particles are freely precipitated, the small particles rising from the water outlet collide with the large particles sinking, so that the particle size is increased, the specific gravity is increased, the precipitation is accelerated, and on the other hand, the particles sinking at the speed equal to the rising speed of water flow form a layer of suspended layer in the tank to intercept and filter the rising small particles. The utility model discloses an improvement of chemistry, structure, the total phosphorus of the aquatic of getting rid of that can be fine makes the total phosphorus of play water reduce to about 0.2mg/L from about 1.5mg/L, and the mud granule deposits sooner, and adds medicine and make the granule flocculent bigger, and the proportion is heavier, and the effect is more effective than single mode, has reached the environmental protection and has required (0.5mg/L) sewage discharge.
Preferably, the aeration tank is arranged adjacent to the secondary sedimentation tank, the aeration tank is separated from the secondary sedimentation tank by a cement wall, and the water pipe passes through the cement wall from the aeration tank and enters the secondary sedimentation tank.
Preferably, the water pipe comprises a first pipe section positioned in the aeration tank and a second pipe section positioned in the secondary sedimentation tank, the first pipe section is communicated with the second pipe section, the first pipe section is an L-shaped pipe, and the second pipe section comprises a horizontal pipe and a U-shaped pipe which are sequentially connected.
The L-shaped pipe mainly plays a role in guiding sewage to descend, when the sewage flows horizontally in a horizontal pipe section, the speed is relatively slow, PAC and PAM are added at the time, the chemical agent and the sewage can be fully combined, the pipeline trend at the tail end is changed into a U shape, the outlet is upward, so that the sedimentation sludge is prevented from being washed up by water flow impact, water entering the secondary sedimentation tank flows from bottom to top, clear water flows upwards, particles sink, and the sedimentation effect is obviously improved; and the water outlet direction is opposite to the particle precipitation direction, so that the times and frequency of collision between the ascending small particles and the descending large particles are further improved, the particle size is increased, the specific gravity is increased, and the precipitation is accelerated.
Preferably, the water inlet of the L-shaped pipe is positioned at the top end of the aeration tank.
Preferably, the height of the water outlet of the U-shaped pipe is lower than that of the horizontal pipe.
Can ensure that the sewage at the water outlet has certain water outlet speed and can have kinetic energy colliding with sinking large particles.
Preferably, the PAC dosing box and the PAM dosing box are communicated with the horizontal pipe through pipelines.
Preferably, the device further comprises an air compression pipe, wherein the air compression pipe is communicated with the horizontal pipe and is positioned on the side part of the pipeline close to the PAM dosing box.
The compressed air can mix PAC and PAM with domestic sewage effluent better together, reaction time is quickened to guarantee that the effluent deposits in time, effectively reduce total phosphorus and suspended solid.
Preferably, the device further comprises a picking-up layer, the picking-up layer is positioned above the secondary sedimentation tank, and the PAC dosing tank and the PAM dosing tank are arranged on the picking-up layer.
Preferably, the PAC dosing tank and the PAM dosing tank are provided with valves on pipelines communicated with the water pipe.
Preferably, the diameter of the water pipe is 200-300 mm.
The utility model has the advantages that:
(1) the utility model discloses in, sewage gets into through the water pipe in the aeration tank, goes down to two heavy ponds, puts into PAC (polyaluminium chloride) in the PAC dosing tank, adds PAM (polyacrylamide) in the PAM dosing tank, throws polyaluminium chloride through the PAC dosing tank in the water pipe in two heavy ponds, not only contains a large amount of aluminium ions in the PAC, and self still has the effect of flocculation, and its and orthophosphate's reaction formula as follows: al (Al)3++PO4 3-→AlPO4And ↓, the formed precipitate is discharged to a coal slime pool through sludge discharge to achieve the effect of phosphorus removal, and the PAC has good flocculation effect, so that particles in water can be further flocculated, the particles in water become large, the specific gravity becomes heavy, not only soluble phosphate is removed, but also insoluble phosphate is removed to achieve the effect of phosphorus removal, polyacrylamide is added at the back end of the PAC, and the PAM is an organic polymer flocculant which mainly enables solid particles to become large and accelerate precipitation; the height of water outlet is lower than the height of water inlet, in the secondary sedimentation tank, when the particles are freely precipitated, the small particles rising from the water outlet collide with the large particles sinking, so that the particle size is increased, the specific gravity is increased, the precipitation is accelerated, and on the other hand, the particles sinking at the speed equal to the rising speed of water flow form a layer of suspended layer in the tank to intercept and filter the rising small particles. The utility model can remove the total phosphorus in water well by improving the chemistry and the structure, so that the total phosphorus in the effluent is reduced from about 1.5mg/L to about 0.2mg/L, the sludge particles are deposited more quickly, the flocculence of the particles is larger by adding the medicine, the specific gravity is heavier, the effect is more effective than that of a single mode, and the requirement of environmental protection on sewage discharge (0.5mg/L) is met;
(2) the L-shaped pipe mainly plays a role in guiding sewage to descend, when the sewage flows horizontally in a horizontal pipe section, the speed is relatively slow, PAC and PAM are added at the time, the chemical agent and the sewage can be fully combined, the pipeline trend at the tail end is changed into a U shape, the outlet is upward, so that the sedimentation sludge is prevented from being washed up by water flow impact, water entering the secondary sedimentation tank flows from bottom to top, clear water flows upwards, particles sink, and the sedimentation effect is obviously improved; the water outlet direction is opposite to the particle precipitation direction, so that the collision frequency and frequency between the ascending small particles and the descending large particles are further increased, the particle size is increased, the specific gravity is increased, and the precipitation is accelerated;
the height of the water outlet of the U-shaped pipe is lower than that of the horizontal pipe.
(3) The sewage at the water outlet can be ensured to have a certain water outlet speed, and the kinetic energy of the sewage colliding with the sinking large particles can be ensured;
(4) the PAC, the PAM and the domestic sewage effluent can be better mixed together by compressed air, the reaction time is accelerated, the effluent is ensured to be precipitated in time, and the total phosphorus and suspended matters are effectively reduced;
(5) PAC dosing tank, PAM dosing tank and pipeline in this embodiment can adopt the mine water to add the medicine workshop and eliminate, have also played the effect of old and useless utilization.
Drawings
FIG. 1 is a schematic structural view of a domestic sewage phosphorus removal device according to an embodiment of the present invention;
reference numbers in the figures: 1. an aeration tank; 2. a secondary sedimentation tank; 3. a water pipe; 31. an L-shaped pipe; 32. a horizontal tube; 33. a U-shaped pipe; 4. a PAC dosing box; 5. a PAM dosing tank; 6. selecting a high layer; 7. pressing an air pipe;
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, the domestic sewage dephosphorization apparatus comprises an aeration tank 1, a secondary sedimentation tank 2, a water pipe 3, a PAC dosing tank 4 and a PAM dosing tank 5; the water pipe 3 enters the secondary sedimentation tank 2 from the aeration tank 1, the water inlet of the water pipe 3 is positioned in the aeration tank 1, the water outlet of the water pipe 3 is positioned in the secondary sedimentation tank 2, the height of the water outlet is lower than that of the water inlet, the water outlet is vertically upward, the PAC dosing tank 4 and the PAM dosing tank 5 are communicated with the water pipe 3 positioned in the secondary sedimentation tank 2 through a pipeline in sequence along the water flow direction, and the PAC dosing tank 4 and the PAM dosing tank 5 are higher than the secondary sedimentation tank 2.
The aeration tank 1 is arranged adjacent to the secondary sedimentation tank 2, the aeration tank 1 is separated from the secondary sedimentation tank 2 by a cement wall, and the water pipe 3 passes through the cement wall from the aeration tank 1 and enters the secondary sedimentation tank 2.
In this embodiment, domestic sewage phosphorus removal device is still including choosing high level 6, chooses high level 6 to be located the top of secondary sedimentation tank 2, PAC dosing tank 4 PAM dosing tank 5 arranges on choosing high level, PAC adds the medicine, 4 PAM dosing tank 5 passes through pipeline and 3 intercommunications of water pipe. And the PAC dosing tank 4, the PAM dosing tank 5 and the pipeline communicated with the water pipe 3 are provided with valves for controlling the dosing amount according to different phosphorus contents in sewage.
PAC (polyaluminium chloride) is put in a PAC dosing tank 4, PAM (polyacrylamide) is added in a PAM dosing tank 5, polyaluminium chloride is dosed in a water pipe of a secondary sedimentation tank 2 through the PAC dosing tank 4, the PAC not only contains a large amount of aluminum ions, but also has the flocculation function, and the reaction formula of the PAC and orthophosphate is as follows: al (Al)3++PO4 3-→AlPO4↓, the sediment that forms discharges the effect that the coal slime pond reached dephosphorization through row mud, moreover because PAC self has fine flocculation, more can further flocculate the granule in the aquatic, makes the granule grow in aquatic, and the proportion becomes heavy, has not only got rid of soluble phosphate, has also got rid of insoluble phosphate, reaches the dephosphorization, throw polyacrylamide again at PAC rear end, PAM is organic polymer flocculant, mainly enables solid particle grow, with higher speed sinks to sinkPrecipitating;
the diameter of the water pipe 3 is 200-300mm, a pipeline of DN273 can be selected, and the PAC dosing tank 4, the PAM dosing tank 5 and the pipeline connected with the water pipe 3 can be eliminated by adopting a mine water dosing workshop, thereby playing the effect of waste utilization
In this embodiment, sewage enters through the water pipe in aeration tank 1, goes down to secondary sedimentation tank 2, and the delivery height is less than the water inlet height, and in secondary sedimentation tank, when the granule takes place freely to deposit, the little granule that rises by the delivery port collides with sunken large granule, makes the particle size grow, and the proportion increases, and the sediment is accelerated, and on the other hand, the granule that sinks the speed and equals rivers rising speed will form one deck suspension layer in the pond, forms interception and filtering action to the little granule that rises. The embodiment is improved through chemistry and structure, can well remove the total phosphorus in water, and make the total phosphorus of outlet water reduce to about 0.2mg/L from about 1.5mg/L, and the mud granule deposits sooner, and adds the medicine and makes the granule flocculent bigger, and the proportion is heavier, and the effect is more effective than the single mode, has reached the environmental protection and has required (0.5mg/L) sewage discharge.
Example two:
as shown in fig. 1, the water pipe 3 includes a first pipe section located in the aeration tank 1 and a second pipe section located in the secondary sedimentation tank 2, the first pipe section is communicated with the second pipe section, the first pipe section is an L-shaped pipe 31, and the second pipe section includes a horizontal pipe 32 and a U-shaped pipe 33 which are connected in sequence.
The water inlet of the L-shaped pipe 31 is positioned at the top end of the aeration tank 1, and the horizontal section at the bottom is positioned at the same height as the horizontal pipe 32; the height of the water outlet of the U-shaped pipe 33 is lower than that of the horizontal pipe 32, so that sewage at the water outlet can have a certain water outlet speed, and kinetic energy of collision with sinking large particles can be achieved.
The L-shaped pipe 31 mainly plays a role in guiding sewage to descend, when the horizontal pipe 32 is in a section, the sewage flows horizontally and has a relatively slow speed, the PAC and the PAM are added at the moment, the chemical agent and the sewage can be fully combined, the pipeline direction at the tail end is changed into a U shape, the outlet is upward, so that the precipitated sludge is prevented from being washed up by water flow impact, water entering the secondary sedimentation tank flows from bottom to top, clear water flows upwards, particles sink, and the sedimentation effect is obviously improved; and the water outlet direction is opposite to the particle precipitation direction, so that the times and frequency of collision between the ascending small particles and the descending large particles are further improved, the particle size is increased, the specific gravity is increased, and the precipitation is accelerated.
The right side of the pipeline of the PAM dosing box 5 further comprises an air compression pipe 7, and the air compression pipe 7 is communicated with the horizontal pipe 32. The compressed air can mix PAC and PAM with domestic sewage effluent better together, reaction time is quickened to guarantee that the effluent deposits in time, effectively reduce total phosphorus and suspended solid.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The domestic sewage dephosphorization device is characterized by comprising an aeration tank, a secondary sedimentation tank, a water pipe, a PAC dosing tank and a PAM dosing tank; the water pipe gets into two heavy ponds by the aeration tank, the water inlet of water pipe is located in the aeration tank, the delivery port of water pipe is located two heavy ponds, and the height of delivery port is less than the water inlet, and the delivery port is vertical upwards, along the rivers direction, PAC dosing tank PAM dosing tank loop through the pipeline and is located the water pipe intercommunication in two heavy ponds, PAC dosing tank PAM dosing tank height is higher than two heavy ponds.
2. The domestic sewage dephosphorization apparatus according to claim 1, wherein said aeration tank is disposed adjacent to said secondary sedimentation tank, said aeration tank and said secondary sedimentation tank are separated by a cement wall, and said water pipe is passed through the cement wall from the aeration tank to the secondary sedimentation tank.
3. The domestic sewage dephosphorization apparatus according to claim 1, wherein the water pipe comprises a first pipe section positioned in the aeration tank and a second pipe section positioned in the secondary sedimentation tank, the first pipe section is communicated with the second pipe section, the first pipe section is an L-shaped pipe, and the second pipe section comprises a horizontal pipe and a U-shaped pipe which are sequentially connected.
4. The domestic sewage dephosphorization apparatus according to claim 3, wherein the water inlet of said L-shaped pipe is located at the top end of the aeration tank.
5. The domestic sewage dephosphorization apparatus according to claim 3, wherein the height of the water outlet of the U-shaped pipe is lower than the height of the horizontal pipe.
6. The domestic sewage dephosphorization apparatus according to claim 3, wherein said PAC dosing tank and said PAM dosing tank are communicated with a horizontal pipe through a pipeline.
7. The domestic sewage dephosphorization apparatus according to claim 3, further comprising a pneumatic tube, wherein said pneumatic tube is communicated with the horizontal tube and is positioned at the side of the pipeline close to the PAM dosing tank.
8. The domestic sewage dephosphorization apparatus according to claim 1, further comprising a raising layer, wherein the raising layer is located above the secondary sedimentation tank, and the PAC dosing tank and the PAM dosing tank are arranged on the raising layer.
9. The domestic sewage dephosphorization apparatus according to claim 1, wherein valves are provided on the pipes through which the PAC dosing tank and the PAM dosing tank communicate with the water pipe.
10. The domestic sewage dephosphorization apparatus according to claim 1, wherein the diameter of said water pipe is 200-300 mm.
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| CN202022515702.7U CN213570041U (en) | 2020-11-03 | 2020-11-03 | Domestic sewage phosphorus removal device |
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| CN202022515702.7U CN213570041U (en) | 2020-11-03 | 2020-11-03 | Domestic sewage phosphorus removal device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112174446A (en) * | 2020-11-03 | 2021-01-05 | 淮南矿业(集团)有限责任公司 | Domestic sewage phosphorus removal device |
| CN114133076A (en) * | 2021-10-28 | 2022-03-04 | 上海市机电设计研究院有限公司 | High-density sedimentation system for small-sized sewage treatment equipment and control method thereof |
-
2020
- 2020-11-03 CN CN202022515702.7U patent/CN213570041U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112174446A (en) * | 2020-11-03 | 2021-01-05 | 淮南矿业(集团)有限责任公司 | Domestic sewage phosphorus removal device |
| CN114133076A (en) * | 2021-10-28 | 2022-03-04 | 上海市机电设计研究院有限公司 | High-density sedimentation system for small-sized sewage treatment equipment and control method thereof |
| CN114133076B (en) * | 2021-10-28 | 2024-03-29 | 上海市机电设计研究院有限公司 | High-density sedimentation system for small sewage treatment equipment and control method thereof |
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