CN117699929A - Sewage treatment system and method - Google Patents
Sewage treatment system and method Download PDFInfo
- Publication number
- CN117699929A CN117699929A CN202311735741.XA CN202311735741A CN117699929A CN 117699929 A CN117699929 A CN 117699929A CN 202311735741 A CN202311735741 A CN 202311735741A CN 117699929 A CN117699929 A CN 117699929A
- Authority
- CN
- China
- Prior art keywords
- tank
- carrier
- flocculation
- sewage treatment
- sedimentation tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 154
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000005189 flocculation Methods 0.000 claims abstract description 169
- 230000016615 flocculation Effects 0.000 claims abstract description 169
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 160
- 238000004062 sedimentation Methods 0.000 claims abstract description 131
- 239000013049 sediment Substances 0.000 claims abstract description 57
- 238000005345 coagulation Methods 0.000 claims abstract description 48
- 230000015271 coagulation Effects 0.000 claims abstract description 48
- 238000012544 monitoring process Methods 0.000 claims abstract description 40
- 239000010802 sludge Substances 0.000 claims description 93
- 239000006228 supernatant Substances 0.000 claims description 16
- 238000004065 wastewater treatment Methods 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 239000002244 precipitate Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- 239000003814 drug Substances 0.000 description 24
- 230000000694 effects Effects 0.000 description 16
- 230000008569 process Effects 0.000 description 14
- 229940079593 drug Drugs 0.000 description 13
- 238000010586 diagram Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000000969 carrier Substances 0.000 description 7
- 230000035484 reaction time Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 230000001112 coagulating effect Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000012217 deletion Methods 0.000 description 3
- 230000037430 deletion Effects 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241000876443 Varanus salvator Species 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a sewage treatment system and a sewage treatment method, wherein the system comprises the following steps: coagulation tank, flocculation tank and sedimentation tank. Wherein, the coagulation tank, the flocculation tank and the sedimentation tank are communicated in sequence along the sewage flow direction. In addition, part of the sediment in the sedimentation tank is returned to the flocculation tank. The system also includes a control module including: the carrier control module is used for adjusting the circulating carrier quantity and the externally added carrier quantity in the sediment returned to the flocculation tank by the sedimentation tank by monitoring the first actual carrier density in the flocculation tank and the water quantity and the water quality of the water inlet end, so that the carrier density in the flocculation tank is kept within a first preset range; and the dosing control module is used for adjusting the dosing amount added into the coagulation tank and the flocculation tank by monitoring the second actual carrier density of the flocculation tank and combining the water quantity and the water quality of the water inlet end. The sewage treatment system and the sewage treatment method improve the sewage treatment efficiency and the effluent quality by coordinating and matching with the sewage treatment equipment.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment system and a sewage treatment method.
Background
At present, the drainage pipe network of the sewage treatment system has the problems of mixed connection, staggered joint and the like, and is easy to cause rainwater and sewage converging and overflow pollution of mixed flow, thereby further causing water pollution. Among the numerous solutions, a decentralized approach to sewage treatment is an important tool. CSO (Combined sewer overflows, combined overflow) treatment stations and CSO treatment equipment are generally used for treating water pollution caused by overflow pollution. The overflow pollution has the characteristics of large fluctuation of water quality and water quantity, poor stability, strong randomness and the like. When overflow polluted water or rain and sewage of sewage plants are cooperatively treated, the problem that the instantaneous water quantity of overflow water is huge and the positions of the overflow water are random occurs is faced, and then the sewage treatment system needs to have larger treatment load and treatment efficiency under the limited occupied area when the overflow water is treated. In the advanced treatment stage of normal operation of a sewage plant, the flux problem also exists in a high-efficiency sedimentation tank in a sewage treatment system. At present, the overflow water treatment still has the problems of low treatment efficiency and low load, so that the equipment operation efficiency is improved to cope with the severe change of the water quality of the incoming water, and the overflow pollution treatment effect is improved to become the pain spot requirement in the sewage treatment process.
Patent CN113321283 discloses an artificial intelligence dosing coagulating sedimentation complete sets and dosing system thereof, including dirty wastewater tank, dosing tank, liquid mixture water conservancy diversion pond, coagulating sedimentation tank and water purification detection pond, and dirty wastewater tank, dosing tank, liquid mixture water conservancy diversion pond, coagulating sedimentation tank and water purification detection pond are adjacent between switch on to set gradually with the transverse path in proper order. The system also comprises a sewage water inlet source collecting system, a sewage water source data collecting operation system, a PLC control system and an operation monitoring system. Through the setting of intelligent dosing system and intelligent dosing coagulating sedimentation complete sets, steerable multiunit motor and circulating pump carry out corresponding work. When the automatic dosing device works, the corresponding information states of metering dosing and dosing which are automatically controlled are selected, and accurate real-time dosing data under different environmental conditions are selected.
Patent CN113264645 discloses a domestic sewage treatment system comprising a cyclone sand setting device, a biochemical system, a further treatment system, a disinfection system and a sludge treatment system. The biochemical system comprises an anaerobic tank, an anoxic tank, an aerobic tank and a first sedimentation tank which are arranged in sequence according to the sewage flow direction. The advanced treatment system comprises a loading multi-effect clarification tank, wherein the loading multi-effect clarification tank is provided with a coagulation tank, a flocculation tank and a second sedimentation tank in sequence according to the sewage flow direction, a plurality of suspended fillers are arranged in an anoxic tank and an aerobic tank, two submersible mixers are arranged in the anoxic tank, and a plurality of water distributors and a plurality of aeration devices which are arranged in a staggered manner are arranged at the bottom of the aerobic tank.
The system discloses the basic composition of a sewage treatment system and the situation of adjusting the dosage according to the quality of inflow water, but does not disclose the operation of each component part in the sewage treatment system through the integral coordination so as to ensure the efficient and stable operation of the sewage treatment system, cannot effectively cope with the severe change of the quality of overflow water, and still has the problems of lower equipment operation efficiency and poorer overflow pollution treatment effect.
In view of the above technical problems, the present invention is particularly directed.
Disclosure of Invention
The first aim of the invention is to provide a sewage treatment system which can be suitable for the scenes of overflow sewage treatment in rainy seasons, sewage treatment in sewage plants, sewage deep treatment and the like, and realizes efficient and stable sewage treatment by high-load and high-intelligent coordinated operation of the sewage treatment system.
A second object of the present invention is to provide a sewage treatment method.
To achieve the above object, a first aspect of the present invention provides a sewage treatment system, including a coagulation tank, a flocculation tank and a sedimentation tank, wherein the coagulation tank, the flocculation tank and the sedimentation tank are sequentially communicated along a sewage flow direction, a part of sediment in the sedimentation tank is returned to the flocculation tank, and the sewage treatment system further includes a control module, wherein the control module includes:
The carrier control module adjusts the circulating carrier quantity and the external carrier quantity in the sediment returned to the flocculation tank by the sedimentation tank by monitoring the first actual carrier density in the flocculation tank and the water quantity and the water quality of the water inlet end, so that the carrier density in the flocculation tank is kept in a first preset range,
and the dosing control module is used for adjusting the dosing amount added into the coagulation tank and the flocculation tank by monitoring the second actual carrier density of the flocculation tank and combining the water quantity and the water quality of the water inlet end.
Further, the carrier control module comprises a sedimentation tank material control module which determines whether to return sediment of the sedimentation tank to the flocculation tank based on mud level of the sedimentation tank.
Further, the system also includes a sludge disposal device connected to the sedimentation tank, and a sedimentation tank material control module controls the amount of sediment delivered by the sedimentation tank to the sludge disposal device to maintain a mud level in the sedimentation tank within a second preset range.
Further, the system also comprises a carrier separation device, the carrier separation device is connected with the sedimentation tank, the sediment in the sedimentation tank enters the flocculation tank through the circulating carrier separated by the carrier separation device, and the residual sediment after the circulating carrier is separated is conveyed to the sludge disposal device.
Further, the system also comprises a water outlet quality monitoring module, wherein the water outlet quality monitoring module monitors the water quality of the water outlet end of the sedimentation tank and feeds back the water quality to the dosing control module so as to further adjust the dosing amount added into the coagulation tank and the flocculation tank.
Further, the sludge treatment device is connected with the flocculation tank, and the supernatant in the sludge treatment device is at least partially returned to the flocculation tank.
Further, a crack is arranged between the coagulation tank and the flocculation tank, and sewage flows from the coagulation tank to the flocculation tank along the antigravity direction through the crack.
Further, a plurality of slip planes are formed on the inner wall of the sedimentation tank along the axial direction of the sedimentation tank, and gradient differences are formed among the slip planes.
Further, the distance between the outlet of the flocculation tank and the bottom of the sedimentation tank is less than half of the height of the tank wall of the sedimentation tank.
By applying the technical scheme in the embodiment of the invention, the following technical effects are realized:
1. the sewage treatment system controls the operation of equipment in the sewage treatment system by monitoring the operation data of the sewage treatment system, realizes the coordinated operation of the equipment in the sewage treatment system, can flexibly and rapidly cope with the severe change of the incoming water quality through intelligent control, and effectively improves the working efficiency and the water outlet quality of the sewage treatment system.
2. The sewage treatment method increases the weight of flocculate generated by flocculation by controlling the carrier density, improves the sedimentation speed, shortens the flocculation reaction time and improves the pollutant removal effect.
3. The sewage treatment system improves the utilization rate of the carrier by circulating the carrier in the sediment to the flocculation tank, thereby reducing the additional adding amount of the carrier.
4. The sewage treatment system can reduce the drug addition amount while ensuring the high-efficiency operation of sewage treatment by adjusting the drug addition amount according to the carrier density.
In order to achieve the above object, a second aspect of the present invention provides a sewage treatment method, comprising:
step S1, monitoring a first actual carrier density in a coagulation tank and water quantity and water quality of a water inlet end, and adjusting a circulating carrier quantity and an externally added carrier quantity in a sediment returned to the flocculation tank by a sedimentation tank so that the carrier density in the flocculation tank is kept in a first preset range;
and S2, monitoring the second actual carrier density of the flocculation tank, and adjusting the dosage of the water into the flocculation tank and the flocculation tank by combining the water quantity and the water quality of the water inlet end.
Further, the carrier control module outputs a first preset sub-range based on the water quality of the water inlet end, and step S1 includes:
Step S11, judging whether the first actual carrier density is larger than a first preset sub-range;
step S12, when the first actual carrier density is smaller than or equal to a first preset sub-range, calculating the carrier missing amount in the flocculation tank according to the first actual carrier density and the first preset sub-range;
step S13, acquiring an actual mud level of a sedimentation tank, and judging whether the actual mud level is greater than or equal to a preset mud level;
step S14, returning sediment from the sedimentation tank 3 according to the carrier missing amount and separating the circulating carrier into the flocculation tank when the actual mud level value is greater than or equal to the preset mud level value;
and S15, determining the added carrier amount according to the circulating carrier amount and the carrier deletion amount.
Further, step S1 further includes:
and S16, conveying sediment from the sedimentation tank to the sludge disposal device when the first actual carrier density is greater than a first preset sub-range so as to keep the mud level in the sedimentation tank within a second preset range.
Further, step S1 further includes:
and S17, conveying the residual sediment after separating the circulating carrier to a sludge disposal device.
Further, the method further comprises:
and step S3, returning at least part of supernatant in the sludge treatment device to the flocculation tank.
Further, the method further comprises:
and S4, monitoring the water quality of the water outlet end of the sedimentation tank, and further adjusting the dosage of the water into the coagulation tank and the flocculation tank.
By applying the technical scheme in the embodiment of the invention, the following technical effects are realized:
1. the sewage treatment method controls the operation of equipment in the sewage treatment system by monitoring the operation data of the sewage treatment system, realizes the coordinated operation of the equipment in the sewage treatment system, can flexibly and rapidly cope with the severe change of the incoming water quality through intelligent control, and effectively improves the working efficiency and the water outlet quality of the sewage treatment system.
2. The sewage treatment method increases the weight of flocculate generated by flocculation by controlling the carrier density, improves the sedimentation speed, shortens the flocculation reaction time and improves the pollutant removal effect.
3. According to the sewage treatment method, the utilization rate of the carrier is improved by circulating the carrier in the precipitate to the flocculation tank, so that the additional adding amount of the carrier is reduced.
4. According to the sewage treatment method, the dosage is adjusted according to the carrier density, so that the high-efficiency operation of sewage treatment can be ensured, and the dosage of the medicine can be reduced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a schematic diagram of a sewage treatment system according to one embodiment;
FIG. 2 shows a schematic diagram of another embodiment of a wastewater treatment system;
FIG. 3 shows a schematic diagram of a sewage treatment system according to yet another embodiment;
FIG. 4 shows a schematic diagram of a sewage treatment system according to yet another embodiment;
FIG. 5 shows a schematic diagram of the connection of a coagulation tank and a flocculation tank in one embodiment;
FIG. 6 is a schematic diagram showing the construction of a sedimentation tank in one embodiment;
FIG. 7 shows a schematic diagram of the connection of a flocculation basin and a sedimentation basin in an embodiment;
FIG. 8 shows a flow chart of a wastewater treatment process according to one embodiment;
FIG. 9 shows a flow chart of step S1 in one embodiment;
FIG. 10 shows a flowchart of step S1 in another embodiment;
FIG. 11 shows a flow chart of step S1 in yet another embodiment;
FIG. 12 shows a flow chart of a wastewater treatment method according to yet another embodiment;
FIG. 13 shows a flow chart of a wastewater treatment process according to another embodiment;
FIG. 14 is a schematic diagram showing the construction of a sewage treatment system according to an embodiment;
FIG. 15 illustrates a control logic diagram of the intelligent control system in one embodiment.
Reference numerals: 1. a coagulation pool; 2. a flocculation tank; 3. a sedimentation tank; 31. a first slip surface; 32. a second slip surface; 4. a control module; 41. a carrier control module; 42. a dosing control module; 5. a sludge disposal device; 6. a carrier separation device; 7. a water quality monitoring module for outlet water; 110. a reaction tank; 111. a coagulation pool; 112. a first flocculation tank; 113. a second flocculation tank; 114. a sedimentation tank; 1141. a sludge pump; 1142. a circulation valve; 1143. a mud discharging valve; 115. a stirrer; 120. monitoring equipment; 121. a water inlet monitor; 122. a water quality monitor for outlet water; 123. a density meter; 1231. a first densitometer; 1232. a second densitometer; 124. a liquid level gauge; 125. a mud level meter; 1251. a first mud level meter; 1252. a second mud level meter; 126. a pressure gauge; 130. a dosing device; 131. a dosing pump; 132. the medicine room; 133. a medicine adding point; 140. the carrier feeding and circulating device; 141. an electric control valve; 142. a cyclone; 143. a carrier feeder; 150. a sludge disposal device; 151. a supernatant pump; 152. a sludge pump of the sludge pond; 160. an intelligent control system; 170. a frequency converter; 180. and (3) a valve.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
The invention is described in further detail below in connection with specific examples which are not to be construed as limiting the scope of the invention as claimed.
In the description, unless clearly indicated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The sewage treatment system and method according to the embodiments of the present application are described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a sewage treatment system according to an embodiment of the present application.
Aiming at the scenes of overflow sewage treatment in rainy seasons, sewage treatment in sewage plants, advanced sewage treatment and the like, the embodiment realizes efficient and stable sewage treatment by high-load and high-intelligent coordinated operation of the sewage treatment system, and solves the problem of low operation load of the conventional sewage treatment system.
In this embodiment, as shown in fig. 1, the sewage treatment system includes a coagulation tank 1, a flocculation tank 2 and a sedimentation tank 3, and the coagulation tank 1, the flocculation tank 2 and the sedimentation tank 3 are sequentially communicated with each other along the sewage flow direction. Sewage sequentially passes through a pool body structure streamline and reacts with medicines and carriers in the pool in the process, and then flocs generated by flocculation reaction are brought into a sedimentation tank to be sedimentated, so that the purification of sewage is realized.
In the embodiment, part of the sediment in the sedimentation tank 3 is returned to the flocculation tank 2 so as to realize the recycling of the carriers in the sediment.
In this embodiment, as shown in fig. 1, to cope with severe changes in the quality of the incoming water, the sewage treatment system further includes a control module 4, configured to monitor operation data of the sewage treatment system and control operation of devices in the sewage treatment system, so as to implement intelligent control of the sewage treatment process by coordinating devices in the sewage treatment system, and effectively improve operation efficiency of each device in the sewage treatment system, thereby improving efficiency of sewage treatment and quality of outgoing water.
Specifically, as shown in fig. 1, the control module 4 includes a carrier control module 41 and a dosing control module 42. Wherein the carrier control module 41 adjusts the circulating carrier amount and the additional carrier amount in the sediment returned from the sedimentation tank 3 to the flocculation tank 2 by monitoring the first actual carrier density in the coagulation tank 1 and the water amount and water quality at the water inlet end so that the carrier density in the flocculation tank 2 is maintained within a first preset range.
The probability of collision of fine flocs can be effectively increased by controlling the carrier density in the flocculation tank 2, so that larger flocs can be generated by rapid combination, the weight of flocs generated by flocculation is increased, the sedimentation speed is increased, the flocculation reaction time is shortened, and the removal effect of pollutants is improved. For example, the addition of heavy media aggravates the weight of flocs produced by flocculation, increases its weight, accelerates precipitation, shortens reaction time, and increases the removal of Total Phosphorus (TP), suspended Solids (SS), chemical Oxygen Demand (COD). In addition, the utilization of the carrier can be improved by recycling the carrier in the precipitate to the flocculation tank.
The first preset range is determined according to past sewage operation data and field operation debugging of an application scene of the sewage treatment system. It should be noted that, before the operation of the sewage treatment system, on-site operation and debugging can be performed on sewage, and the first preset range in the carrier control module 1 is obtained by integrating the past sewage operation data. In addition, in the running process of the sewage treatment system, on-site running debugging can be carried out according to the treatment condition and the working requirement of the sewage treatment system, and the first preset range in the carrier control module 1 is updated by integrating the past sewage running data.
For example, as shown in Table 1, before or during the operation of the sewage system, the water quality range (e.g., A 1 ：C 1 ～C 2 Wherein A represents a water quality range, C represents water quality in a corresponding water quality range), adding medicines to the coagulation tank 1 and the flocculation tank 2 according to the corresponding medicine adding amount, and then adding a loading body to the flocculation tank 2 according to the monitoring value of the first actual carrier density in sewage so as to control the second actual carrier density to gradually increase and correspondingly reduce the medicine adding amount, so that the water quality of the produced water meets the standard requirement and achieves the optimal flocculation effect. The carrier and the medicine need to cooperate in sewage treatment, and the minimum value (M) of the medicine adding amount under the water quality range can be determined through the on-site operation and debugging 1 ) And correspondingly obtaining the maximum carrier density (B) 1 )。
In addition, before or during the operation of the sewage system, the water quality range (such as A 1 ：C 1 ～C 2 Wherein A represents a water quality range, C represents water quality in a corresponding water quality range) and adding a drug to the coagulation tank 1 and the flocculation tank 2 without decreasing the drug addition, then adding a carrier to the flocculation tank 2 and monitoring flocculation based on a monitored value of a first actual carrier density in the wastewater, adding a carrier to the flocculation tank 2 to increase the weight of flocculate in flocculation until an optimal flocculation is achieved, and determining a minimum carrier density (B) in the water quality range b1 ) To B (to) b1 -B 1 As a first preset sub-range corresponding to the water quality range of the water inlet end, finally obtaining a first preset range B b1 -B n 。
TABLE 1 Table 1 Water turbidity correspondence table
It should be noted that, during the actual operation of the sewage treatment system, if the carrier density of the sewage is high, this will cause the first actual carrier density in the coagulation tank to exceed the first preset range, and further cause the second actual carrier density in the flocculation tank to exceed the first preset range.
In this embodiment, the dosing control module 42 adjusts the dosing amount to the coagulation tank 1 and the flocculation tank 2 by monitoring the second actual carrier density of the flocculation tank 2 in combination with the amount of water and the quality of water at the water inlet end. The carrier control module 41 controls the carrier density in the flocculation tank 2 to a certain range by controlling the circulating carrier amount and the externally added carrier amount, so that the drug addition amount in the reaction tank can be adjusted in cooperation with the second carrier density of the flocculation tank 2, thereby reducing the drug addition amount while ensuring the high-efficiency operation of sewage treatment.
In another embodiment, the carrier control module 41 comprises a sedimentation tank material control module. Specifically, the sedimentation tank material control module determines whether to return the sediment of the sedimentation tank 3 to the flocculation tank 2 based on the mud level of the sedimentation tank 3, so that the problem of lower carrier circulation efficiency caused by the fact that the amount of circulating carrier in the returned sediment is small and the returned sediment is small can be avoided. Wherein the sludge level at which the sediment of the sedimentation tank 3 starts to return to the flocculation tank 2 can be determined according to the minimum value of the first preset range, so as to meet the minimum carrier density requirement in the flocculation tank 2.
Further, as shown in fig. 2, the system further comprises a sludge disposal device 5, and the sludge disposal device 5 is connected with the sedimentation tank 3. The material control module controls the amount of sediment delivered by the sedimentation tank 3 to the sludge disposal device 5 to keep the sludge level in the sedimentation tank 3 within a second preset range. The second preset range is determined according to the height of the mud bucket of the sedimentation tank 3, the maximum value of the first preset range, the power of the field device and the like, so that the highest carrier density requirement in the flocculation tank 2 is met, and the influence on water outlet caused by exceeding the height of the mud bucket is avoided.
In a further embodiment, as shown in fig. 3, the system further comprises a carrier separation device 6, the carrier separation device 6 being connected to the sedimentation tank 3. Specifically, the sediment in the sedimentation tank 3 enters the flocculation tank 2 through the circulating carrier separated by the carrier separating device 6, and the residual sediment after the circulating carrier is separated is conveyed to the sludge disposal device 5.
Further, the sludge disposal device 5 is connected to the flocculation tank 2, and the supernatant in the sludge disposal device 5 is at least partially returned to the flocculation tank 2, thereby reducing the water loss caused by the return of the sediment from the sedimentation tank 3, and improving the sludge concentration effect in the sludge disposal device 5 after the return of the supernatant.
In yet another embodiment, as shown in fig. 4, the system further comprises a water quality monitoring module 7. Specifically, the effluent quality monitoring module 7 monitors the water quality of the effluent end of the sedimentation tank 3, and feeds back the water quality to the dosing control module 42 so as to further adjust the dosing amount added into the coagulation tank 1 and the flocculation tank 2 and timely and accurately adjust the dosing amount to ensure the sewage treatment quality of the sewage treatment system.
In a specific embodiment, as shown in fig. 5, a gap may be provided between coagulation tank 1 and flocculation tank 2, such that sewage flows from coagulation tank 1 to flocculation tank 2 via the gap in an antigravity direction. Through coagulating basin and flocculation basin high-order intercommunication, sewage can run through the circulation from top to bottom in flocculation basin 2 for medicine and carrier can further fully contact and react with sewage, have improved the treatment effeciency and the quality of sewage.
In addition, a plurality of slip surfaces are formed on the inner wall of the sedimentation tank 3 along the axial direction of the sedimentation tank 3, and gradient differences are formed among the slip surfaces. For example, as shown in fig. 6, two slip surfaces are disposed in the sedimentation tank 3, and the first slip surface 31 above the sedimentation tank 3 in the vertical direction has a smaller gradient, so that the effective use space of the sedimentation tank is ensured; the second slip surface 32 located at the lower part of the sedimentation tank 3 in the vertical direction has a large gradient, and can accelerate the sedimentation process of the particulate matters in the sedimentation tank 3.
In addition, the distance between the outlet of the flocculation tank 2 and the bottom of the sedimentation tank 3 is less than half of the height of the tank wall of the sedimentation tank 3. For example, as shown in fig. 7, the flocculation tank 2 is communicated with the sedimentation tank 3 at a low position, so that the situation that the flocculation tank is broken in the starting process due to residual flocculation in the sedimentation tank 3 when the sewage treatment system is operated intermittently in rainy days is effectively avoided, and the water outlet quality of the sewage treatment system is ensured. In a preferred embodiment, the outlet height of the flocculation basin 2 is higher than the upper edge of the mud bucket in the sedimentation basin 3.
By applying the technical scheme in the embodiment of the invention, the following technical effects are realized:
1. the sewage treatment system controls the operation of equipment in the sewage treatment system by monitoring the operation data of the sewage treatment system, realizes the coordinated operation of the equipment in the sewage treatment system, can flexibly and rapidly cope with the severe change of the incoming water quality through intelligent control, and effectively improves the working efficiency and the water outlet quality of the sewage treatment system.
2. The sewage treatment method increases the weight of flocculate generated by flocculation by controlling the carrier density, improves the sedimentation speed, shortens the flocculation reaction time and improves the pollutant removal effect.
3. The sewage treatment system improves the utilization rate of the carrier by circulating the carrier in the sediment to the flocculation tank, thereby reducing the additional adding amount of the carrier.
4. The sewage treatment system can reduce the drug addition amount while ensuring the high-efficiency operation of sewage treatment by adjusting the drug addition amount according to the carrier density.
In order to put the embodiment into practice, the invention also provides a sewage treatment method.
Fig. 8 is a flow chart of a sewage treatment method according to an embodiment of the present invention, specifically including the following steps:
step S1, monitoring the first actual carrier density in the coagulation tank 1 and the water quantity and water quality of the water inlet end, and adjusting the circulating carrier quantity and the externally added carrier quantity in the sediment returned to the flocculation tank 2 by the sedimentation tank 3 so that the carrier density in the flocculation tank 2 is kept within a first preset range.
Specifically, as shown in fig. 9, step Sl includes the steps of:
step S11, judging whether the first actual carrier density is larger than a first preset sub-range corresponding to water quality.
The carrier control module outputs a first preset sub-range based on the water quality of the water inlet end.
Step S12, when the first actual carrier density is smaller than or equal to a first preset sub-range, calculating the carrier missing amount in the flocculation basin 2 according to the first actual carrier density and the first preset range.
In a preferred embodiment, the vector deficiency can be calculated by the following formula: m is M s ＝M max -ρ a V a Wherein M is s Representing the vector deletion amount, M max Represents the maximum value, ρ, of the first preset sub-range a Representing the first actual carrier density, V a Representing the volume of the coagulation basin. The carrier loss amount is calculated according to the maximum value of the first preset range in the process, so that the carrier density in the flocculation tank can be kept at a higher level, and the dosage in the flocculation tank and the flocculation tank can be controlled at a lower level in the follow-up process.
And S13, acquiring the actual mud level of the sedimentation tank 3, and judging whether the actual mud level is greater than or equal to a preset mud level.
And S14, returning sediment from the sedimentation tank 3 according to the carrier missing amount and separating the circulating carrier into the flocculation tank 2 when the actual mud level value is greater than or equal to the preset mud level value.
And S15, determining the added carrier amount according to the circulating carrier amount and the carrier deletion amount.
In one embodiment, the applied carrier amount can be calculated by the following formula: m is M d =mmax- ρ bVb, where Md represents the added carrier amount, mmax represents the maximum value of the first preset subrange, ρ b Representing the second actual carrier density of the flocculation tank after the circulating carrier is thrown into the flocculation tank, V b Representing the volume of the flocculation basin.
S2, monitoring the second actual carrier density of the flocculation tank 2, and adjusting the dosage of the water in the flocculation tank 1 and the flocculation tank 2 by combining the water quantity and the water quality of the water inlet end.
In one embodiment of the invention, the initial dosing amount can be correspondingly matched according to the water quantity and the water quality of the water inlet end, and then the initial dosing amount can be adjusted according to the second actual carrier density to determine the final dosing amount. The carrier can increase the probability of collision of fine flocs, so that larger flocs can be generated by rapid combination, the weight of flocs generated by flocculation is increased, the sedimentation speed is increased, the flocculation reaction time is shortened, and the pollutant removal effect is improved. The dosage can be correspondingly reduced when the flocculation tank 2 has a certain carrier density, so that the dosage can be effectively saved while the full reaction of the medicine and the water body is ensured, and the treatment efficiency and quality of the sewage are improved under the efficient cooperation of the carrier and the medicine.
In another embodiment, as shown in fig. 10, step S1 further includes:
step S16, when the first actual carrier density is greater than the first preset sub-range, conveying sediment from the sedimentation tank 3 to the sludge disposal device 5 so as to keep the sludge level in the sedimentation tank 3 within the second preset range.
In one embodiment of the invention, when the first actual carrier density is greater than the first preset sub-range, it is indicated that the carrier density in the flocculation basin has reached a higher level, and sludge accumulation in the sedimentation basin can be avoided by transporting sediment from the sedimentation basin 3 to the sludge handling device 5. Meanwhile, in order to ensure that sediment can be returned from the sedimentation tank 3 and the circulating carriers can be separated into the flocculation tank 2 in time when the density of the carriers in the flocculation tank 2 is insufficient, the sediment amount from the sedimentation tank 3 to the sludge treatment device 5 can be controlled so as to keep the sludge level in the sedimentation tank 3 within a second preset range.
In yet another embodiment, as shown in fig. 11, step S1 further includes:
step S17, the remaining precipitate after separating the circulating carriers is sent to the sludge disposal device 5. Thus, the sludge in the remaining sediment can be intensively disposed and utilized in the subsequent step.
In yet another embodiment, as shown in fig. 12, the method further comprises:
step S3, returning at least part of the supernatant in the sludge treatment apparatus 5 to the flocculation tank 2. By returning the supernatant to the flocculation basin 2, water loss in the treatment system is reduced and concentration of the sludge in the sludge disposal device 5 is achieved.
The amount of supernatant returned to flocculation tank 2 is affected by the liquid level fed to sludge disposal device 5. The liquid level is affected by the amount of sediment that is fed into the sludge disposal device 5, including the remaining sediment that is fed into the sludge disposal device 5 after separation of the circulating carriers, and the sediment that is fed into the sludge disposal device 5 by the sedimentation tank 3. When the level of the supernatant in the sludge disposal device 5 reaches a preset level value, the supernatant in the sludge disposal device 5 will be returned to the flocculation tank 2.
In another embodiment, as shown in fig. 13, the method further comprises:
and S4, monitoring the water quality of the water outlet end of the sedimentation tank 3, and further adjusting the dosage of the water added into the coagulation tank 1 and the flocculation tank 2.
By monitoring the water quality of the water outlet end of the sedimentation tank 3, whether the water quality meets the requirements of the scene where the sewage treatment system is located can be determined rapidly and timely, so that the water quality of the water outlet of the sewage treatment system meets the quality requirements under various scenes by correspondingly flexibly and accurately adjusting the dosage.
1. The sewage treatment method controls the operation of equipment in the sewage treatment system by monitoring the operation data of the sewage treatment system, realizes the coordinated operation of the equipment in the sewage treatment system, can flexibly and rapidly cope with the severe change of the incoming water quality through intelligent control, and effectively improves the working efficiency and the water outlet quality of the sewage treatment system.
2. The sewage treatment method increases the weight of flocculate generated by flocculation by controlling the carrier density, improves the sedimentation speed, shortens the flocculation reaction time and improves the pollutant removal effect.
3. According to the sewage treatment method, the utilization rate of the carrier is improved by circulating the carrier in the precipitate to the flocculation tank, so that the additional adding amount of the carrier is reduced.
4. According to the sewage treatment method, the dosage is adjusted according to the carrier density, so that the high-efficiency operation of sewage treatment can be ensured, and the dosage of the medicine can be reduced.
The sewage treatment system and method are described in detail below with reference to one specific example.
As shown in fig. 14, in this particular embodiment, the sewage treatment system includes a reaction tank 110, a monitoring device 120, a dosing device 130, a carrier dosing and circulating device 140, a sludge disposal device 150, and an intelligent control system 160. The components of the sludge treatment system are mutually related, and intelligent cooperative control is realized through the intelligent control system 160 so as to realize the high-load sewage treatment effect.
The sewage treatment system has small occupied area and flexible arrangement, and can efficiently and stably treat overflow water with large instantaneous flow in a limited space.
Specifically, as shown in fig. 14 and 15, the reaction tank 110 includes a coagulation tank 111, a first flocculation tank 112, a second flocculation tank 113, and a sedimentation tank 114. In addition, the mixer 115 controlled by the frequency converter 170 is provided in the coagulation tank 111, the first flocculation tank 112, and the second flocculation tank 113, and the hydraulic direction can be made to coincide with the sewage flow direction by stirring, that is, the hydraulic direction formed by the mixer in the coagulation tank 111, the first flocculation tank 112, and the second flocculation tank 113 is downward, and upward in this order.
In addition, a sludge pump 1141, a circulation valve 1142 and a sludge discharge valve 1143 are provided in the sedimentation tank 114. The sludge pump 1141 is used for pumping out the sediment in the sedimentation tank 114, and pumps the sediment into the carrier feeding and circulating device 140 when the circulating valve 1142 is opened, and pumps the sediment into the sludge disposal device 150 when the sludge discharge valve 1143 is opened.
The monitoring device 120 is disposed in the corresponding structure of the tank, and is used for monitoring operation data of the sewage treatment system in real time and feeding the data back to the intelligent control system 160. Specifically, as shown in fig. 14, the monitoring apparatus 120 includes a water inflow monitor 121, a water outflow quality monitor 122, a densitometer 123, a liquid level meter 124, a mud level meter 125, and a pressure gauge 126.
Wherein, the water inlet monitor 121 is arranged at the water inlet pipe of the coagulation tank 111 and is used for monitoring the water quality and the water inlet amount of the water inlet. In this embodiment, the quality of the incoming water includes turbidity, SS, COD, ammonia nitrogen, TP, etc. of the water body. The effluent quality monitor 122 is disposed at the outlet pipe of the sedimentation tank 114, and is used for monitoring the quality of water after passing through the sewage treatment system. In this embodiment, the effluent quality includes turbidity, SS, COD, ammonia nitrogen, TP, etc. of the water body.
Densitometer 123 includes a first densitometer 1231 disposed in coagulation basin 111 and a second densitometer 1232 disposed in first flocculation basin 112. Wherein the first densitometer 1231 is used to monitor the actual carrier density in the coagulation basin 111 and the second densitometer 1232 is used to monitor the actual carrier density in the first flocculation basin 112. A level gauge 124 is provided in the sludge disposal device 150 for monitoring the level of liquid in the sludge disposal device.
The mud level gauge 125 includes a first mud level gauge 1251 disposed in the sedimentation tank 114 and a second mud level gauge 1252 disposed in the sludge disposal device 150. Wherein the first mud level meter 1251 is used to monitor the mud level in the sedimentation tank 114 and the second mud level meter 1252 is used to monitor the mud level in the sludge disposal device 150. A pressure gauge 126 is provided in the carrier addition and circulation device for monitoring the pressure generated by the sludge pump 1141.
The dosing device 130 comprises a dosing pump 131 controlled by a frequency converter 170 and a valve 180, and a drug compartment 132 and a plurality of dosing points 133 connected by the dosing pump 131. Wherein the first dosing point is a dosing mixer arranged on the water inlet pipe and used for dosing PAC (poly aluminium chloride, polyaluminum chloride) to the water inlet pipe according to the control information of the intelligent control system 160; the second dosing point is a dosing disc which is arranged at the joint of the water inlet pipe and the coagulation tank 111 and covers the water inlet pipe orifice, and is used for adding PAC (programmable logic controller) into the coagulation tank 111 according to the control information of the intelligent control system 160; the third dosing point is a dosing disc at the joint of the coagulation tank 111 and the first flocculation tank 112, and is used for adding PAM (polyacrylamide) or a nano flocculant into the first flocculation tank 112 according to control information of the intelligent control system 160. In addition, the degree of drug mixing at the point of administration can be increased by structural arrangement or the administration mixing member.
The carrier feeding and circulating device 140 comprises a cyclone 142 and a carrier feeder which are respectively connected to an electric control valve 141143. Specifically, the cyclone is used to separate the carriers in the sediment pumped from the sedimentation tank 114 to the first flocculation tank 112 and to separate the remaining sediment into the sludge disposal device 150 according to the control information of the intelligent control system 160. The carrier adder is used to add additional carrier to the first flocculation basin 112. In this embodiment, the carrier is ore or placer. Preferably, the diameter of the carrier is 60-150 um, and the density of the carrier is 2-5g/m 3 。
The sludge disposal apparatus 150 includes a supernatant pump 151 and a sludge pump 152 controlled by a frequency converter 170 and a valve 180. Specifically, the supernatant pump is used to pump supernatant in the sludge disposal device 150 into the first flocculation basin 112 based on control information of the intelligent control system 160. The sludge pump of the sludge pond is used for pumping the sludge in the sludge disposal device 150 out of the sludge disposal device 150 to participate in the external circulation of the muddy water.
As shown in fig. 15, the intelligent control system 160 controls the operation of the sewage treatment system according to the monitoring data fed back from the monitoring device 120.
The intelligent control system 160 provides various control over the wastewater treatment system, as will be set forth below.
The intelligent control system 160 obtains the dosage added in the reaction tank to correspondingly control the frequency converter to adjust the stirrer, so as to realize the matching of the rotating speed and the dosage, and make the flocculation reaction more sufficient.
The intelligent control system 160 obtains the quality of the incoming water monitored by the incoming water monitor 121 and the actual carrier density in the first flocculation basin 112 monitored by the densimeter 123, and comprehensively analyzes the quality of the incoming water and the actual carrier density to control the frequency converter and the valve to adjust the dosing amount, the dosing type, the dosing time interval and the like of the dosing pump. Specifically, as shown in table 1, the corresponding dosing amount is determined by different ranges of turbidity of the incoming water, such as range A1 corresponding to M1, and then the amount of M1 is adjusted according to the actual carrier density match in the first flocculation basin 112 to determine the final dosing amount.
The intelligent control system 160 obtains the preset carrier densities B0-B1 in the first flocculation basin 112 and the actual carrier density in the coagulation basin 111 monitored by the densitometer 123 to control the amount of sediment pumped into the carrier dosing and circulation device 140 via the circulation valve 1142. Further, the intelligent control system 160 obtains the above sediment amount to control the frequency converter to adjust the frequency of the sludge pump 1141, and then obtains the pressure value monitored by the pressure gauge 126 to adjust the specification and the opening number of the cyclone, so as to improve the separation efficiency of the carrier. In addition, the intelligent control system 160 also obtains the actual carrier density in the first flocculation tank 112 monitored by the densitometer 123 after the circulating carrier is added, so as to control the added carrier amount K of the carrier adding device in the first flocculation tank 112.
The intelligent control system 160 obtains the sludge level in the sedimentation tank 114 monitored by the first sludge level meter 1251 to control the sludge pump 1141 to be started. Specifically, when the monitored sludge level in the sedimentation tank 114 is greater than or equal to the preset sludge level H, the sludge pump 1141 is started; when the monitored sludge level in the sedimentation tank 114 is less than the preset sludge level H, the operation of the sludge pump 1141 is stopped. It should be noted that the preset mud level H is based on the minimum value B of the preset carrier density b1 And (5) determining.
The intelligent control system 160 obtains the mud level in the sludge treatment device 150 monitored by the second mud level meter 1252 to control the frequency converter to adjust the frequency at which the sludge treatment device 150 pumps out the sludge into the external circulation of the muddy water, so as to realize the recycling of the concentrated sludge and avoid the blocking of the operation of the sewage treatment system caused by the accumulation of the sludge. In addition, the intelligent control system 160 also acquires the liquid level in the sludge treatment device 150 monitored by the liquid level meter 124 to control the frequency converter to adjust the frequency of pumping the supernatant into the flocculation tank 2, thereby effectively avoiding water loss caused by returning sediment in the sedimentation tank and improving the concentration effect of the sludge in the sludge treatment device.
In one embodiment, the above-described wastewater treatment system may be put into use using a wastewater treatment process.
After the wastewater treatment system has been in operation for a period of time, the influent monitor 121 monitors an increase in influent turbidity from A1 to A2, the first densitometer 1231 monitors an increase in actual carrier density in the coagulation basin 111 but does not exceed the maximum B2 of the first predetermined sub-range, and the first mud level meter 1251 monitors a mud level in the sedimentation basin 114 that is above H.
The intelligent control system 160 adjusts the frequency of the sludge pump 1141 according to the monitored actual carrier density in the coagulation tank 111 to adjust the amount of sediment pumped from the sedimentation tank 114 to the carrier feeding and circulating device through the circulating valve 1142, and feeds the circulating carrier separated from the sediment by the carrier feeding and circulating device 140 into the first flocculation tank 112.
The first mud level meter 1251 continuously detects the mud level in the sedimentation tank 114, and when the first mud level meter 1251 detects that the mud level in the sedimentation tank 114 still exceeds a second preset range after the mud level in the sedimentation tank 114 is pumped out of the sediment, the intelligent control system 160 controls the mud pump 1141 to pump the sediment from the sedimentation tank 114 to the sludge disposal device 150 through the mud discharge valve 1143, and controls the amount of the sediment pumped into the sludge disposal device 150 so as to keep the mud level in the sedimentation tank 114 to meet the second preset range.
After the circulating carrier separated by the carrier feeding and circulating device 140 is fed into the first flocculation tank 112, the second densimeter 1232 monitors that the actual carrier density in the first flocculation tank 112 does not reach the maximum value B2 of the first preset sub-range yet, and the intelligent control system feeds the additional carrier into the first flocculation tank 112 according to the actual carrier density in the first flocculation tank 112 and the maximum value B2 of the first preset sub-range, so that the actual carrier density in the first flocculation tank 112 reaches the maximum value B2 of the first preset sub-range.
The intelligent control system 160 controls the dosing device 130 to dose the drug at the dosing point according to the turbidity of the incoming water A2 and the actual carrier density in the first flocculation basin 112 monitored by the second densitometer 1232 after the dosing of the additional carrier.
The intelligent control system is used for realizing intelligent cooperative control on the sewage treatment system, realizing the high-load sewage treatment effect, being capable of efficiently, stably and rapidly coping with overflow water with larger instantaneous flow in a limited space, and improving the intellectualization and stability of the sewage treatment system.
The above embodiments are merely illustrative embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to apply to the present invention, and all equivalents and modifications according to the technical scheme and the inventive concept thereof are intended to be included in the scope of the present invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
It should be noted that in the description of the present specification, descriptions of terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Claims (15)
1. The utility model provides a sewage treatment system, includes coagulation tank (1), flocculation tank (2) and sedimentation tank (3), coagulation tank (1), flocculation tank (2) with sedimentation tank (3) are along sewage flow direction intercommunication setting in proper order, sedimentation tank (3) part precipitate returns to flocculation tank (2), a serial communication port, still includes control module (4), control module (4) include:
The carrier control module (41), the carrier control module (41) adjusts the circulating carrier amount and the external carrier amount in the sediment returned to the flocculation tank (2) by the sedimentation tank (3) by monitoring the first actual carrier density in the flocculation tank (1) and the water amount and the water quality of the water inlet end, so that the carrier density in the flocculation tank (2) is kept in a first preset range,
and the dosing control module (42) is used for adjusting the dosing amount added into the coagulation tank (1) and the flocculation tank (2) by monitoring the second actual carrier density of the flocculation tank (2) and combining the water quantity and the water quality of the water inlet end.
2. A sewage treatment system according to claim 1, wherein the carrier control module (41) comprises a sedimentation tank material control module which determines whether to return sediment of the sedimentation tank (3) to the flocculation tank (2) based on the mud level of the sedimentation tank (3).
3. The sewage treatment system according to claim 2, further comprising a sludge disposal device (5), the sludge disposal device (5) being connected to the sedimentation tank (3), the sedimentation tank material control module controlling the amount of sediment delivered by the sedimentation tank (3) to the sludge disposal device (5) to keep the sludge level in the sedimentation tank (3) within a second preset range.
4. A sewage treatment system according to claim 3, further comprising a carrier separation device (6), wherein the carrier separation device (6) is connected to the sedimentation tank (3), the sediment of the sedimentation tank (3) enters the flocculation tank (2) through the circulating carrier separated by the carrier separation device (6), and the remaining sediment after separating the circulating carrier is transported to the sludge disposal device (5).
5. The sewage treatment system according to claim 1, further comprising a water quality monitoring module (7), wherein the water quality monitoring module (7) monitors the water quality of the water outlet end of the sedimentation tank (3), and feeds back the water quality to the dosing control module (42) so as to further adjust the dosing amount added into the coagulation tank (1) and the flocculation tank (2).
6. A sewage treatment system according to claim 3, characterized in that the sludge disposal device (5) is connected to the flocculation basin (2), the supernatant in the sludge disposal device (5) being at least partially returned to the flocculation basin (2).
7. A sewage treatment system according to claim 1, characterised in that a pinch is provided between the coagulation tank (1) and the flocculation tank (2), through which pinch the sewage flows in an antigravity direction from the coagulation tank (1) to the flocculation tank (2).
8. The sewage treatment system according to claim 1, wherein the inner wall of the sedimentation tank (3) forms a plurality of slip surfaces along the axial direction of the sedimentation tank (3), and gradient differences are formed between the plurality of slip surfaces.
9. A sewage treatment system according to claim 1, characterized in that the outlet of the flocculation basin (2) is at a distance from the bottom of the sedimentation basin (3) which is less than half the height of the basin wall of the sedimentation basin (3).
10. A sewage treatment method, characterized by comprising:
step S1, monitoring a first actual carrier density in a coagulation tank (1) and water quantity and water quality at a water inlet end, and adjusting the circulating carrier quantity and the externally added carrier quantity in sediment returned to a flocculation tank (2) by a sedimentation tank (3) so that the carrier density in the flocculation tank (2) is kept within a first preset range;
and S2, monitoring the second actual carrier density of the flocculation tank (2), and adjusting the dosage of the water added into the flocculation tank (1) and the flocculation tank (2) by combining the water quantity and the water quality of the water inlet end.
11. The wastewater treatment method according to claim 10, wherein the carrier control module outputs a first preset sub-range based on the water quality of the water inlet end, and the step S1 comprises:
step S11, judging whether the first actual carrier density is larger than the first preset sub-range;
Step S12, if the first actual carrier density is smaller than or equal to the first preset sub-range, calculating the carrier missing amount in the flocculation tank (2) according to the first actual carrier density and the first preset sub-range;
step S13, acquiring an actual mud position of the sedimentation tank (3), and judging whether the actual mud position is larger than or equal to a preset mud position;
s14, returning sediment from the sedimentation tank (3) according to the carrier missing amount and separating a circulating carrier into the flocculation tank (2) when the actual mud level value is greater than or equal to the preset mud level value;
and step S15, determining the added carrier amount according to the circulating carrier amount and the carrier missing amount.
12. The wastewater treatment method according to claim 11, wherein the step S1 further comprises:
and S16, conveying sediment from the sedimentation tank (3) to a sludge disposal device (5) when the first actual carrier density is greater than the first preset sub-range so as to keep the mud level in the sedimentation tank (3) within a second preset range.
13. The wastewater treatment method according to claim 11, wherein the step S1 further comprises:
and step S17, conveying the residual sediment after separating the circulating carrier to a sludge disposal device (5).
14. The wastewater treatment method according to claim 11, further comprising:
and step S3, returning at least part of supernatant in the sludge treatment device (5) to the flocculation tank (2).
15. The wastewater treatment method according to claim 11, further comprising:
and S4, monitoring the water quality of the water outlet end of the sedimentation tank (3), and further adjusting the dosage of the water into the coagulation tank (1) and the flocculation tank (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311735741.XA CN117699929A (en) | 2023-12-15 | 2023-12-15 | Sewage treatment system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311735741.XA CN117699929A (en) | 2023-12-15 | 2023-12-15 | Sewage treatment system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117699929A true CN117699929A (en) | 2024-03-15 |
Family
ID=90158526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311735741.XA Pending CN117699929A (en) | 2023-12-15 | 2023-12-15 | Sewage treatment system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117699929A (en) |
-
2023
- 2023-12-15 CN CN202311735741.XA patent/CN117699929A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103435235B (en) | Kitchen waste filtrate treatment equipment and method | |
| CN101844844B (en) | Device for treating high-concentration electroplating wastewater and application thereof | |
| CN105621792A (en) | City watercourse drain outlet sewage treatment method and device | |
| CN111777232A (en) | Production wastewater defluorination treatment system and method | |
| EP3148943B1 (en) | Method for clarification of wastewater | |
| CN1948177A (en) | Method of treating low temperature low turbidity water by high density active mud sediment back flow | |
| CN110386689A (en) | Pretreatment system for bed mud residual water treatment equipment | |
| CN210419541U (en) | Pretreatment system for bottom mud residual water treatment equipment | |
| CN210855500U (en) | Sewage treatment and recycling system | |
| KR100889377B1 (en) | A wastewater transaction appratus | |
| CN111302460A (en) | Method for reducing suspended matters in ash water of coal water slurry gasification | |
| CN217677223U (en) | Industrial wastewater electrochemical phosphorus removal system | |
| CN117699929A (en) | Sewage treatment system and method | |
| WO2021114591A1 (en) | Food industry wastewater treatment plant | |
| CN210528702U (en) | Electroplating effluent regeneration and reuse integrates processing apparatus | |
| CN211311222U (en) | Soyfood waste water standard treatment's device | |
| CN105293766A (en) | Heavy metal industrial sewage treatment fundamental process | |
| KR20000008002A (en) | System for treating drain water from water purification plant | |
| CN105293821A (en) | Generic chemical industry sewage treatment basic process | |
| EP2242727A2 (en) | Method and apparatus for the purification of waste water with the sequence of accumulating container, three biological reactors and apparatus for the afterpurification | |
| CN105417836B (en) | Food and cultivation industry sewage disposal fundamental technology | |
| CN217628047U (en) | Multipoint and multi-groove synchronous electrochemical phosphorus removal system | |
| CN220867240U (en) | Promote activated sludge replenishing device of high density sedimentation tank sediment | |
| CN217627730U (en) | Magnetic medium coagulating sedimentation system | |
| CN221254315U (en) | Semiconductor silicon carbide wastewater treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |