CN116354536A - Built-in sewage purification system of TBM - Google Patents
Built-in sewage purification system of TBM Download PDFInfo
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- CN116354536A CN116354536A CN202211520568.7A CN202211520568A CN116354536A CN 116354536 A CN116354536 A CN 116354536A CN 202211520568 A CN202211520568 A CN 202211520568A CN 116354536 A CN116354536 A CN 116354536A
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- 238000000746 purification Methods 0.000 title claims abstract description 77
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- 239000010802 sludge Substances 0.000 claims abstract description 76
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention discloses a sewage purification system with a built-in TBM (Tunnel boring machine), which is used for purifying tunnel construction wastewater into cooling circulating water, and comprises a sewage bin, a sewage pretreatment system, a sewage purification system, a deep purification system, an on-line monitoring system, a sludge dewatering system and a scale inhibition system, wherein the sewage bin, the sewage pretreatment system, the sewage purification system, the deep purification system, the on-line monitoring system and the scale inhibition system are sequentially communicated through pipelines, mud discharge pipelines of the sewage pretreatment system, the sewage purification system, the deep purification system and the on-line monitoring system are respectively communicated with the sludge dewatering system, a liquid outlet end of the sludge dewatering system is communicated with the sewage bin, and a water outlet pipeline of the scale inhibition system is respectively communicated with an inner circulating water bin and the cooling system of the TBM. The sewage purification system is highly integrated with the TBM host, and each system is in modularized design, can be flexibly assembled according to the structure of the TBM, and meets the construction requirement of the TBM.
Description
Technical Field
The invention relates to the technical field of tunnel construction wastewater treatment devices, in particular to a sewage purification system with a built-in TBM.
Background
In the tunnel construction process, each system or equipment on the TBM (full section hard rock tunnel boring machine) heats up, and the heat is accumulated to a certain extent, so that the normal operation of the equipment is affected, the heat generated by the system or equipment is taken away in time, and air cooling cannot be adopted in a closed tunnel, so that cooling water is needed to take away the heat.
At present, a large amount of water is required to be consumed in the TBM construction process, wherein the consumed water is mainly used for two aspects, namely, water spraying of a cutter head, sealing flushing of a main bearing, drilling of an anchor rod drilling machine, belt flushing, flushing of all parts and the like, and the water is consumed; and secondly, cooling the hydraulic system, the lubricating system, the main driving motor, a gearbox, a frequency converter and other systems and equipment, and belongs to cooling water. The existing TBM water supply and water cooling systems mainly comprise two types, wherein the first type is of an open design, inlet water outside a tunnel is conveyed to a TBM cold water tank through a pipeline and then is pumped to various consuming and cooling water stations, and the cooled water is discharged into a tunnel or a sewage tank after heat exchange; the second is semi-closed design, and is different from the first in that the cooling water is designed into a closed circulation system, the cooling medium is cooling liquid or mixed liquid of the cooling liquid and distilled water, so that scale can be effectively avoided, meanwhile, the cooling medium is cooled by water in a cold water tank, and water entering the outside of the hole returns to the cold water tank after heat exchange. Although both systems can supply water and cool, the first structure consumes a large amount of water, the water cooling system is easy to scale, and the second system still has the problem of large water consumption.
Disclosure of Invention
The invention aims to provide a sewage purification system with a built-in TBM, which can move forward along with the TBM at the same time to treat construction wastewater in the TBM excavation process, and is used for cooling a circulating water system after reaching standards, so that the aim of purifying and recycling tunnel wastewater is effectively fulfilled.
In order to achieve the above purpose, the invention provides a built-in sewage purification system of a TBM, wherein the sewage purification system is used for purifying tunnel construction wastewater into cooling circulating water, the sewage purification system comprises a sewage bin, a sewage pretreatment system, a sewage purification system, a deep purification system, an on-line monitoring system, a sludge dewatering system and a scale inhibition system, the sewage bin is used for collecting TBM tunnel construction wastewater, the sewage bin, the sewage pretreatment system, the sewage purification system, the deep purification system, the on-line monitoring system and the scale inhibition system are sequentially communicated through pipelines, the sewage pretreatment system, the sewage purification system, the deep purification system and a mud discharge pipeline of the on-line monitoring system are respectively communicated with the sludge dewatering system, a liquid outlet end of the sludge dewatering system is communicated with the sewage bin, and a water outlet pipeline of the scale inhibition system is respectively communicated with an inner circulating water bin of the TBM and the cooling system.
Further, the sewage pretreatment system comprises a pre-screening device, a cyclone separation device and a bottom screen dehydration device which are sequentially connected, and light liquid treated by the sewage pretreatment system enters the sewage purification system.
Further, the sewage purification system comprises a reaction tank, a reagent feeding system, a sludge reflux system and a magnetic recovery system, wherein the reaction tank comprises a first-stage reaction tank, a second-stage reaction tank, a third-stage reaction tank and a sedimentation tank which are sequentially arranged side by side, the upper part of the first-stage reaction tank is provided with a sewage water inlet, the bottoms of the first-stage reaction tank, the second-stage reaction tank and the third-stage reaction tank are sequentially communicated, the top of the third-stage reaction tank is communicated with the sedimentation tank, a water guide plate is arranged on one side, connected with the third-stage reaction tank, of the sedimentation tank, a water inlet is arranged between the lower end of the water guide plate and the bottom plate of the sedimentation tank, and the lower end of the water guide plate is lower than the side wall of the connection part of the sedimentation tank and the third-stage reaction tank; the sludge reflux system comprises a first sludge pump and a first flowmeter, and the outlet end of the first sludge pump is communicated with the magnetic recovery system; the magnetic recycling system comprises a magnetic recycling machine and a high shearing machine, the first sludge pump is communicated with the Gao Jianji, the high shearing machine is communicated with the magnetic recycling machine, the magnetic recycling machine comprises a magnetic recycling device and a magnetic seed feeding device communicated with the magnetic recycling device, and the magnetic seed feeding device is communicated with the secondary reaction tank; the agent adding system comprises a PAC agent adding machine and a PAM agent adding machine, wherein the PAC agent adding machine is arranged above the primary reaction tank, and the PAM agent adding machine is arranged above the tertiary reaction tank.
Further, a second sludge pump and a second flowmeter are further arranged in the sludge reflux system, the outlet end of the second sludge pump is communicated with the magnetic recovery system, and the second sludge pump and the first sludge pump are alternately started for use.
Further, an inclined tube sedimentation area and a mud scraper are arranged in the sedimentation tank, the bottom of the inclined tube sedimentation area is higher than the water inlet, and the mud scraper is arranged below the inclined tube sedimentation area.
Further, the sewage purification system further comprises an electromagnetic flowmeter arranged on the water inlet pipeline of the reaction tank; the medicament adding system is also provided with a medicament sampling device.
Further, the primary reaction tank, the secondary reaction tank and the tertiary reaction tank are provided with stirrers.
Further, the deep purification system comprises a first filtering system and a second filtering system which are connected in sequence.
Further, the sludge dewatering system comprises a sludge tank, a sludge regulating tank and sludge dewatering equipment which are sequentially connected, and the sludge dewatering equipment is connected with the control system.
Further, the online monitoring system is connected with the deep purification system; the scale inhibition system is arranged on a water outlet pipeline after the on-line monitoring is qualified.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention relates to a built-in sewage purification system of a TBM (Tunnel boring machine), which is used for purifying tunnel construction wastewater into cooling circulating water.
(2) Compared with the traditional internal and external circulation system, the built-in sewage purification system of the TBM can effectively ensure the requirements of cooling circulating water on water quality and water quantity, and has the specific advantages that: (1) improve the sewage recycling efficiency: more than 95% of the sewage passing through the sewage treatment system can be reused; (2) no secondary pollution: the agent is not required to be added, inorganic and organic matters added from outside are prevented from entering the circulating water body, and TBM circulating cooling equipment and a pipe network are effectively protected; (3) preventing scaling: the adhesion of calcium, magnesium plasma in water can be prevented or slowed down, and the scaling phenomenon caused by high water hardness can be relieved; (4) the cooling water requirement of TBM equipment is met, and the remote water supplementing consumption is reduced; (5) the construction sewage discharge capacity is reduced, and the environmental protection pressure is reduced; (6) the problem of external water taking by constructing cooling water in a water resource deficient area is solved; (7) the method solves the problem of real-time monitoring of tunnel sewage in the discharge process, and improves construction safety early warning.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments 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, without limitation, the embodiments of the invention. In the drawings:
FIG. 1 is a schematic diagram of a built-in sewage purification system of a TBM of the present invention;
FIG. 2 is a schematic diagram of a sewage purification system according to the present invention;
wherein, 1-a sewage bin; 2-a sewage pretreatment system; 3-a sewage purification system; 3.1-a primary reaction tank; 3.2 secondary reaction tank-; 3.3-three-stage reaction tanks; 3.4-a sedimentation tank; 4-a deep purification system; 5-an online monitoring system; 6-a sludge dewatering system; 7-a scale inhibition system; 8-an internal circulating water bin; 9-a cooling system; 10-a magnetic recycling machine; 11-high shearing machine; 12-a first sludge pump; 13-a second sludge pump; 14-an inclined tube sedimentation zone; 15-a mud scraper; 16-an electromagnetic flowmeter; 17-PAC dosing machine; an 18-PAM dosing machine; 19-a stirrer; 20-a first flowmeter; 21-a second flowmeter.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
Referring to fig. 1, the present embodiment provides a sewage purification system with a built-in TBM, where the sewage purification system is used for purifying tunnel construction wastewater into cooling circulating water, so as to implement sewage treatment and reuse. The sewage purification system is mainly used for treating sewage generated in the TBM construction process, and the main pollutant is SS. The sewage is firstly subjected to the pretreatment system of the front section to remove large-particle pollutants, then enters the sewage purification system to be treated, so that pollutants such as SS, oil, total phosphorus, heavy metals, COD, BOD and the like in the sewage are effectively removed, the sewage after the purification treatment enters the deep purification system to further remove the SS in the sewage, and finally, all indexes reach the requirement of cooling water quality. The sewage purification system comprises a sewage bin 1, a sewage pretreatment system 2, a sewage purification system 3, a deep purification system 4, an on-line monitoring system 5, a sludge dewatering system 6 and a scale inhibition system 7, and has the following specific structure:
the sewage bin 1 is connected with a dedusting system, a cleaning system, a construction system and the like of the TBM and is used for collecting dedusting wastewater, cleaning water and construction water in the TBM tunnel construction process. The sewage bin, the sewage pretreatment system, the sewage purification system, the deep purification system, the on-line monitoring system and the scale inhibition system are sequentially communicated through pipelines, mud discharge pipelines of the sewage pretreatment system, the sewage purification system, the deep purification system and the on-line monitoring system are respectively communicated with a sludge dewatering system, a liquid outlet end of the sludge dewatering system is communicated with the sewage bin, and a water outlet pipeline of the scale inhibition system is respectively communicated with an inner circulating water bin 8 and a cooling system 9 of the TBM; the on-line monitoring system is connected with the deep purification system; the scale inhibition system is arranged on the water outlet pipeline after the on-line monitoring is qualified.
In a specific embodiment, the sewage pretreatment system comprises a pre-screening device, a cyclone separation device and a bottom screen dehydration device which are connected in sequence, and the light liquid treated by the sewage pretreatment system enters a sewage purification system. The sewage pretreatment system can remove large-particle sand and stones, the sewage is discharged after the process of pre-screening, cyclone separation treatment and bottom screen dehydration, and the treated light liquid enters the sewage purification system.
In a specific embodiment, the sewage purification system comprises a reaction tank, a medicament adding system, a sludge reflux system and a magnetic recovery system, wherein the reaction tank comprises a first-stage reaction tank 3.1, a second-stage reaction tank 3.2, a third-stage reaction tank 3.3 and a sedimentation tank 3.4 which are sequentially arranged side by side, the upper part of the first-stage reaction tank is provided with a sewage inlet, the bottoms of the first-stage reaction tank, the second-stage reaction tank and the third-stage reaction tank are sequentially communicated, the top of the third-stage reaction tank is communicated with the sedimentation tank, one side of the sedimentation tank connected with the third-stage reaction tank is provided with a water guide plate 3.5, a water inlet is arranged between the lower end of the water guide plate and the bottom plate of the sedimentation tank, and the lower end of the water guide plate is lower than the top of the side wall of the part of the sedimentation tank connected with the third-stage reaction tank; that is, the water flowing out from the top of the three-stage reaction tank needs to be guided by the guide plate and then enters the sedimentation tank through the water inlet. The sludge recirculation system includes a first sludge pump 12 and a first flowmeter 20, the outlet end of the first sludge pump being in communication with the magnetic recovery system. The magnetic recycling system comprises a magnetic recycling machine 10 and a high shearing machine 11, a first sludge pump 12 on a return sludge pipeline at the bottom of the sedimentation tank is communicated with the high shearing machine 11, the high shearing machine 11 is communicated with the magnetic recycling machine 10, the magnetic recycling machine comprises a magnetic recycling device and a magnetic seed feeding device communicated with the magnetic recycling device, and the magnetic seed feeding device is communicated with the secondary reaction tank; the medicament adding system comprises a PAC (programmable automation controller) dosing machine 17 and a PAM dosing machine 18, wherein the PAC dosing machine is arranged above the primary reaction tank, and the PAM dosing machine is arranged above the tertiary reaction tank. The sewage purification system that this structure set up adopts integrated form effluent disposal plant, and area is little, multiple functional, integrated level is high, can make full use of TBM inner space, and is rationally distributed, can satisfy the usage space of various specification TBM.
In a specific embodiment, the sedimentation tank is internally provided with an inclined tube sedimentation zone 14 and a mud scraper 15, the bottom of the inclined tube sedimentation zone is higher than the water inlet, and the mud scraper is arranged below the inclined tube sedimentation zone. The sludge reflux system is also provided with a second sludge pump 13 and a second flowmeter 21, the outlet end of the second sludge pump 13 is communicated with the magnetic recovery system, and the second sludge pump 13 and the first sludge pump 12 are alternately started for use. The sewage purification system further comprises an electromagnetic flowmeter 16 arranged on the water inlet pipeline of the reaction tank, the medicament adding system is further provided with a medicament sampling device, and stirrers 19 are arranged in the primary reaction tank, the secondary reaction tank and the tertiary reaction tank. The sewage enters a first-stage reaction tank, PAC added into the first-stage reaction tank by a PAC chemical adding machine is rapidly diffused into water body under the action of a stirrer, colloid particles in water are rapidly destabilized and coagulated to form small flocs. Then the mixture enters a secondary reaction tank, and the small floccules are mixed with magnetic substances added into the secondary reaction tank by a magnetic seed adding device to form magnetic small floccules, so that pollutants such as colloid, suspended matters, metal ions and the like are effectively adsorbed. And (3) enabling water to enter a three-stage reaction tank along with water flow, and combining PAM added into the three-stage reaction tank by a PAM chemical adding machine with the magnetic small floccules to form larger floccules. The sewage containing the magnetic micro-flocculation enters a sedimentation tank, an inclined tube is arranged in the sedimentation tank for sedimentation and a mud scraper, water flows upwards along the inclined tube, and separated mud and residues slide downwards to the bottom of the tank along the inclined tube under the action of gravity and are discharged in a concentrated way through the mud scraper. The discharged sludge enters a high-speed magnetic shearing machine through a sludge pump to break up magnetic flocculation, then enters a magnetic separator to realize flocculation decomposition and separation of magnetic powder and sludge, the nonmagnetic sludge is discharged from the lower part of the magnetic separator and flows into a sludge pool automatically, and magnetic seeds flow into a secondary reaction pool for recycling. After the sewage passes through the purification system, pollutants such as suspended matters, COD, BOD, oil, total phosphorus, heavy metals and the like can be effectively removed.
In a specific embodiment, the depth purification system consists of a first filtration system and a second filtration system connected in sequence. The sewage enters a first-stage filtering system after being purified by a purifying system, and suspended matters in the water are further filtered. The primary filtering system can realize automatic pollution discharge and high-pressure back flushing, has short back flushing duration, can normally produce water while back flushing, continuously operates, is stable and reliable, can cope with various water quality fluctuations, is fully automatic to operate, has flexible installation mode, and can meet the requirement of a TBM installation space. Then, the sewage with high flow rate and large flow rate passes through the secondary filtering system, and the system can intercept pollutants in a layered manner according to the particle size of the pollutants, effectively intercept particles such as suspended matters, impurities and the like, so that the sewage is purified, and deep filtration is realized.
In a specific embodiment, sludge generated by the front-end sewage pretreatment system, the sewage purification system and the deep purification system enters the sludge dewatering system for centralized treatment, and the sludge dewatering system can dewater and discharge low-concentration sludge, so that sludge reduction and harmless utilization are realized. The sludge dewatering system comprises a sludge pond, a sludge regulating pond and sludge dewatering equipment which are sequentially connected, and the sludge dewatering equipment is connected with the control system. The sludge dewatering system can realize automatic operation of sludge lifting, dosing, dewatering and conveying, and the sludge is transported to sludge dewatering equipment after being concentrated by gravity in a sludge regulating tank, and the volume is continuously reduced under a certain pressure, so that the purpose of full dewatering is achieved.
In one embodiment, the scale inhibition system can change the crystallization process of calcium and magnesium plasma to lose adhesion and prevent scaling of cooling pipelines and the like. The on-line monitoring system can monitor the water quality, the temperature and the running condition of each device of the whole system in real time, and timely feed back signals to the control system to realize the conversion of each link.
In the construction process of TBM, tunnel gushing mainly is that groundwater gushes out in a large number from the space or the crack of face geologic body in the excavation process, and this partial gushing water is mainly discharged by working face water pump, often mixes pollutants such as a large amount of silt, concrete, and quality of water is relatively poor, but gushes out water and effectively dredge earlier when the circumstances of gushing out water appears in tunnel construction process through the sluicing, reentrant drain pipe way, trench self-discharge hole, can realize the separation of decontaminating.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a built-in sewage purification system of TBM, its characterized in that, sewage purification system is used for purifying tunnel construction waste water into cooling cycle water, sewage purification system includes sewage storehouse (1), sewage pretreatment system (2), sewage purification system (3), deep purification system (4), on-line monitoring system (5), sludge dewatering system (6) and scale inhibition system (7), sewage storehouse is used for collecting TBM tunnel construction waste water, sewage storehouse sewage pretreatment system sewage purification system deep purification system on-line monitoring system with scale inhibition system communicates through the pipeline in proper order, sewage pretreatment system sewage purification system with on-line monitoring system's mud discharge pipeline respectively with sludge dewatering system communicates, sludge dewatering system's play liquid end with sewage storehouse intercommunication, scale inhibition system's outlet pipe and TBM's inner cycle water storehouse (8) and cooling system (9) communicate respectively.
2. The wastewater purification system of claim 1, wherein the wastewater pretreatment system comprises a pre-screening device, a cyclone separation device and a bottom screen dehydration device which are connected in sequence, and wherein the light liquid treated by the wastewater pretreatment system enters the wastewater purification system.
3. The sewage purification system according to claim 1, wherein the sewage purification system comprises a reaction tank, a reagent feeding system, a sludge reflux system and a magnetic recovery system, the reaction tank comprises a first-stage reaction tank (3.1), a second-stage reaction tank (3.2), a third-stage reaction tank (3.3) and a sedimentation tank (3.4) which are sequentially arranged side by side, a sewage water inlet is formed in the upper part of the first-stage reaction tank, the bottoms of the first-stage reaction tank, the second-stage reaction tank and the third-stage reaction tank are sequentially communicated, the top of the third-stage reaction tank is communicated with the sedimentation tank, a water guide plate is arranged on one side, connected with the third-stage reaction tank, a water inlet is formed between the lower end of the water guide plate and the bottom plate of the sedimentation tank, and the lower end of the water guide plate is lower than the side wall of the connecting part of the sedimentation tank with the third-stage reaction tank; the sludge reflux system comprises a first sludge pump (12) and a first flowmeter (20), and the outlet end of the first sludge pump is communicated with the magnetic recovery system; the magnetic recycling system comprises a magnetic recycling machine (10) and a high shearing machine (11), the first sludge pump (12) is communicated with the Gao Jianji (11), the Gao Jianji (11) is communicated with the magnetic recycling machine (10), the magnetic recycling machine comprises a magnetic recycling device and a magnetic seed adding device communicated with the magnetic recycling device, and the magnetic seed adding device is communicated with the secondary reaction tank; the agent dosing system comprises a PAC dosing machine (17) and a PAM dosing machine (18), wherein the PAC dosing machine is arranged above the primary reaction tank, and the PAM dosing machine is arranged above the tertiary reaction tank.
4. A sewage purification system according to claim 3, wherein a second sludge pump (13) and a second flowmeter (21) are further arranged in the sludge recirculation system, an outlet end of the second sludge pump (13) is communicated with the magnetic recovery system, and the second sludge pump (13) and the first sludge pump (12) are alternately started for use.
5. A sewage purification system according to claim 3, characterized in that an inclined tube sedimentation zone (14) and a mud scraper (15) are arranged in the sedimentation tank, the bottom of the inclined tube sedimentation zone is higher than the water inlet, and the mud scraper is arranged below the inclined tube sedimentation zone.
6. A sewage purification system according to claim 3, characterized in that the sewage purification system further comprises an electromagnetic flow meter (16) arranged on the reaction tank water inlet line; the medicament adding system is also provided with a medicament sampling device.
7. A sewage purification system according to claim 3, wherein agitators (19) are provided in the primary reaction tank, the secondary reaction tank and the tertiary reaction tank.
8. The wastewater purification system of claim 1, wherein the depth purification system comprises a first filtration system and a second filtration system connected in sequence.
9. The wastewater purification system of claim 1, wherein the sludge dewatering system comprises a sludge basin, a sludge conditioning basin, and a sludge dewatering device connected in sequence, the sludge dewatering device being connected to a control system.
10. The wastewater purification system of claim 1, wherein the on-line monitoring system is coupled to a deep purification system; the scale inhibition system is arranged on a water outlet pipeline after the on-line monitoring is qualified.
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| CN202211520568.7A CN116354536A (en) | 2022-11-30 | 2022-11-30 | Built-in sewage purification system of TBM |
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| CN202211520568.7A CN116354536A (en) | 2022-11-30 | 2022-11-30 | Built-in sewage purification system of TBM |
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