CN110028195A - System and technique for constructing tunnel wastewater treatment - Google Patents
System and technique for constructing tunnel wastewater treatment Download PDFInfo
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- CN110028195A CN110028195A CN201910428072.9A CN201910428072A CN110028195A CN 110028195 A CN110028195 A CN 110028195A CN 201910428072 A CN201910428072 A CN 201910428072A CN 110028195 A CN110028195 A CN 110028195A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 120
- 239000002351 wastewater Substances 0.000 claims abstract description 83
- 238000004062 sedimentation Methods 0.000 claims abstract description 45
- 238000004891 communication Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- 239000000701 coagulant Substances 0.000 claims description 28
- 239000010802 sludge Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 8
- 239000007800 oxidant agent Substances 0.000 claims description 6
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- 239000010865 sewage Substances 0.000 description 17
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- 238000010276 construction Methods 0.000 description 11
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Classifications
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- 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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Abstract
The present invention relates to the systems and technique for constructing tunnel wastewater treatment, it is connected to including the first dosing tank, the first pump, the first valve, first pipe mixer, the first reaction tank, the second reaction tank and sedimentation basin, the discharge port of the first pipe mixer that are sequentially communicated with the bottom of the first reaction tank；It further include that the second valve, the medium being sequentially communicated add pond, the second pump and second pipe mixer, the inlet communication of pipeline and the second valve between first pump and the first valve；First dosing tank is connected to first pipe mixer, second pipe mixer respectively.System of the invention can be widely applicable for the constructing tunnel waste water of the different quality situation generated by geological condition difference, meet the waste water treatment requirement of Along Railway different zones in all directions.
Description
Technical field
The present invention relates to the systems and technique for constructing tunnel wastewater treatment, belong to technical field of sewage.
Background technique
When mountain railway is built, route designs Bridge and tunnel is more, and bridge tunnel ratio is high.And the construction of Tunnel Engineering is applied
It is easy local natural ecological environment during work and brings many influences, such as environmental pollution, pollution of waterhead, soil erosion, vegetation
The natural ecologies problems such as destruction.
Wastewater source during constructing tunnel mainly include the following types:
(1) waste water that driving generates.Outer circulation cooling water used in TBM tunneling process is derived from neighbouring river, passes through pipeline
It is delivered to TBM equipment, cooling water direct outlet after heat exchange.Efflux wastewater is mixed with stone powder, is in turbid white；Drilling and blasting method
In construction, it is used for the water of depositing dust after Tunnel Blasting, contains a large amount of suspended matter outlets.
(2) the rock crevice water in tunnel.After crevice water flows through chemical slip casting material and concrete in tunnel wall, flow into
Tunnel drainage ditch, due to being mixed with injecting paste material and concrete, turbid white is presented in water body.
(3) it crosses rock stratum and contacts the water burst generated with hydrous fluids.Water is big, water quality is different according to geological condition and area
Not, while after washing away tunnel it is involved in a large amount of suspended matters.
According to past construction experience, the wastewater flow of tunnel outlet is changed greatly, from several per hour cubes to per hour
Several hundred cubes are differed, mainly caused by the influence of the factors such as unfavorable geology, Tunnel Construction Schedule.
Currently, the main method of processing constructing tunnel waste water has:
(1) natural sedimentation.Not adding medicine, only need to the natural sedimentation in sedimentation basin.Sedimentation basin is larger, and particulate is not easy to locate
Reason, but it is relatively economical, as Xian's waste water preliminary sedimentation tank is rushed in the processing of construction time sand material.
(2) flocculation sedimentation.Flocculant is launched into sewage, and sedimentation separation processing is carried out in sedimentation basin.The rule of sedimentation basin
Mould is larger, and configures flocculant addition facility, and cost effectiveness is only second to natural sedimentation mode, as construction time concrete mixes and stirs flushing
The flocculation sedimentation tanks such as Xian's waste water are rushed in grouting waste water, sand material processing in waste water, dam cofferdam.
(3) mechanical treatment.Flocculant is launched into sewage, makes sludge coagulative precipitation in sedimentation basin, and adopt for sludge
It is handled with mechanical dehydration.Such method is suitable for situation and narrow place more than sludge fine-grained composition, but investment and running cost
With higher, it is suitable for the machinery complexes such as the recycling of construction time fine sand, sludge treatment, oiliness sewage treatment, reusing sewage.
It is that waste water is guided to sedimentation basin that the most common method of waste water is handled in China's constructing tunnel, and waste water is allowed to stop a timing
Between, to be discharged after suspended substance sedimentation.
Since tunnel excavation area innerland is usually little, utilizable area is very limited, and large-scale precipitating is arranged
Pond is often relatively difficult, therefore causes the wastewater sedimentation time insufficient, can only remove in waste water about 50%~70% SS, thus tunnel
Waste water of constructing is substantially discharge beyond standards.Existing investigation shows that only about 10% constructing tunnel waste water takes above-mentioned place of settling
Reason measure, remaining does not take any measure then, but construction waste water is directly discharged into nature channel.To so far, tunnel
The processing of road construction waste water up to standard is still a great problem for perplexing environmentalist, this not only has the tired of fund aspect
It disturbs, the immature of technical aspect also becomes a tunnel wastewater treatment big bottleneck up to standard.
Also occur the new and effective precipitators such as high density technique, sand coagulation process, magnetic-coagulation technique currently on the market
Skill, but there are no being used widely in the improvement of constructing tunnel sewage, and due to different tunnel geology situations, construction method
Etc. different, waste water quality, water, pollutant type have very big difference, and single technology is difficult to meet different regions tunnel
The improvement demand of road construction waste water.
Summary of the invention
In view of the deficiencies of the prior art, the present invention is provided to the system of constructing tunnel wastewater treatment and technique, the systems
Configuration flexibly, can meet different purification demands.
In order to solve the above-mentioned technical problem, technical scheme is as follows:
For the system of constructing tunnel wastewater treatment, including the first dosing tank, the first pump, the first valve, first that are sequentially communicated
The discharge port of pipe-line mixer, the first reaction tank, the second reaction tank and sedimentation basin, the first pipe mixer is reacted with first
The bottom in pond is connected to；It further include that the second valve, the medium being sequentially communicated add pond, the second pump and second pipe mixer, it is described
The inlet communication of pipeline and the second valve between first pump and the first valve；First dosing tank is mixed with first pipe respectively
Clutch, the connection of second pipe mixer.
Further, second valve is connected to the top that medium adds pond；Second pump adds the bottom in pond with medium
Connection.
Further, third pump, the first pipe mixer, second pipe mixing are communicated on first dosing tank
Device is parallel to the outlet of third pump, and the parallel branch between third pump and first pipe mixer is equipped with third valve, third
Parallel branch between pump and second pipe mixer is equipped with the 4th valve.
It further, further include that the second dosing tank being connected to the first reaction tank, the third being connected to the second reaction tank add
Medicine-chest and the 4th dosing tank being connected to the first reaction tank；Pipeline between second dosing tank and the first reaction tank is equipped with
4th pump, the pipeline between the third dosing tank and the second reaction tank are equipped with the 5th pump, the 4th dosing tank and first
Pipeline between reaction tank is equipped with the 6th pump.
Further, the water conservancy diversion for being equipped with top opening in second reaction tank and being set to above the second reaction tank bottom surface
Cylinder, first reaction tank is interior to be equipped with wasteway, and the top of wasteway is connected to the first reaction tank, the bottom end of wasteway and water conservancy diversion
The bottom connection of cylinder；The bottom of second reaction tank is connected to the top of sedimentation basin.
Further, be equipped with water distributor in first reaction tank, the water distributor be located at the first reaction tank inner bottom surface and
Between the top of wasteway.
Further, the bottom of the sedimentation basin is communicated with the 7th pump, and the discharge port of the 7th pump is connected to wasteway；
It further include the 8th pump, first medium separator, second medium separator and the medium cleaning device being sequentially communicated, it is described heavy
The bottom in shallow lake pond is connected to the feed inlet of the 8th pump, is connected at the top of the media outlet of medium cleaning device and the first reaction tank.
Further, first reaction tank, the second reaction tank and sedimentation basin are separated by a hollow cabinet, described
The first baffle plate and the second baffle plate being parallel to each other are equipped between second reaction tank and sedimentation basin, the first baffle plate is located at water conservancy diversion
Between cylinder and the second baffle plate, first baffle plate is fixed on cabinet inner top surface, and second baffle plate is fixed in cabinet
Bottom surface forms the baffling channel of connection the second reaction tank and sedimentation basin.
Further, the top of the sedimentation basin is equipped with overflow weir, and inclined plate is equipped with below overflow weir, is set below the inclined plate
There is mud scraper.
For the technique of constructing tunnel wastewater treatment, is carried out, included the following steps: using system as described above
S1, the first pump, the first valve are opened, so that constructing tunnel waste water to be processed is directly entered the first reaction tank；Meanwhile passing through
First pipe mixer is mixed into coagulant into constructing tunnel waste water to be processed；
Alternatively, opening the first pump, the second valve, adds Chi Bingyu medium so that constructing tunnel waste water to be processed enters medium and add
Destination media in pond is uniformly mixed；It is then turned on the second pump, so that medium adds medium, waste water mixture in pond and enters first
Reaction tank, meanwhile, coagulant is mixed into the mixture by second pipe mixer；
S2, at least one that oxidant, ammonia nitrogen removal agent are added into the first reaction tank, after stirring 5-10min, by constructing tunnel
Waste water inputs the second reaction tank；
Alternatively, after being directly stirred 0.5-1min to the constructing tunnel waste water in the first reaction tank, constructing tunnel waste water is defeated
Enter the second reaction tank；
It is mixed into flocculant in S3, the constructing tunnel waste water into the second reaction tank, is reacted, floccule body is formed, floccule body is obtained, gives up
Aqueous mixtures；
S4, the floccule body that S3 is obtained, waste water mixture input sedimentation basin, and precipitated and separated obtains clear water on upper layer, obtains in lower layer
Obtain excess sludge.
Provided by the present invention for the system and technique of constructing tunnel sewage treatment, for what is contained in constructing tunnel sewage
The polluters such as suspended matter, petroleum-type, COD, hardness, by coagulation, flocculation, load precipitating, tube settling, advanced oxidation, chemistry
Softening kinds of processes is integrated, and realizes application of the integrated system in constructing tunnel sewage treatment, can be widely applicable in
In because geological condition difference due to generate different quality situation constructing tunnel waste water, meet Along Railway not same district in all directions
The waste water treatment requirement in domain: 1. for being to be discharged desired tunnel sewage treatment with " integrated wastewater discharge standard " primary standard,
The thin object removal rate of powder can reach 85% or more in tunnel sewage, under identical treatment effect, cost compared with traditional handicraft save 40 ~
50%, equipment land occupation is only the 15 ~ 20% of traditional handicraft.2. can achieve " for the tunnel sewage treatment of ecological sensitive area
Table quality standard of water environment " (GB 3838-2002) I class standard, discharge can meet environmental carrying capacity requirement.3. for there is reuse to need
The tunnel sewage treatment asked, the water hardness can reach the water quality requirement of TBM external application recirculated water out, realize the reuse of sewage, saves and uses
Water.
Detailed description of the invention
Fig. 1 is the structure diagram of the system for constructing tunnel wastewater treatment of the first embodiment of the invention.
Specific embodiment
Below with reference to embodiment, the present invention will be described in detail.It should be noted that in the absence of conflict, the present invention
In embodiment and embodiment in feature can be combined with each other.For sake of convenience, hereinafter such as occur "upper", "lower", " left side ",
" right side " printed words only indicate consistent with the upper and lower, left and right direction of attached drawing itself, do not play restriction effect to structure.
As shown in Figure 1, the system for being used for constructing tunnel wastewater treatment, including the first dosing tank 1, the first pump being sequentially communicated
13, the first valve 21, first pipe mixer 26, the first reaction tank 6, the second reaction tank 7 and sedimentation basin 8, the first pipe
The discharge port of mixer 26 is connected to the bottom of the first reaction tank 6；It further include that the second valve 22, the medium being sequentially communicated add pond
5, second 18 and second pipe mixer 25 are pumped, the pipeline and the second valve 22 between first pump 13 and the first valve 21
Inlet communication；First dosing tank 1 is connected to first pipe mixer 26, second pipe mixer 25 respectively.
Second valve 22 is connected to the top that medium adds pond 5；The bottom that second pump 18 adds pond 5 with medium connects
It is logical.
Third pump 14, the first pipe mixer 26, second pipe mixer 25 are communicated on first dosing tank 1
It is parallel to the outlet of third pump 14, the parallel branch between third pump 14 and first pipe mixer 26 is equipped with third valve
23, the parallel branch between third pump 14 and second pipe mixer 25 is equipped with the 4th valve 24.
Further include the second dosing tank 2 being connected to the first reaction tank, the third dosing tank 3 being connected to the second reaction tank and with
4th dosing tank 4 of the first reaction tank connection；Pipeline between second dosing tank and the first reaction tank is equipped with the 4th pump
15, the pipeline between the third dosing tank and the second reaction tank is equipped with the 5th pump 16, and the 4th dosing tank and first is instead
Pipeline between Ying Chi is equipped with the 6th pump 17.
The guide shell 40 for being equipped with top opening in second reaction tank 7 and being set to above the second reaction tank bottom surface, institute
It states in the first reaction tank 6 and is equipped with wasteway 37, the top of wasteway is connected to the first reaction tank, the bottom end of wasteway and guide shell
Bottom connection；The bottom of second reaction tank 7 is connected to the top of sedimentation basin 8.
The setting of guide shell can facilitate the mixed of waste water and drug in the case where not influencing in flocculation basin floccule body and increasing
It closes；Exceptional space will not be occupied.
Horizontal position where the top of the guide shell is lower than horizontal position where the top of wasteway.So, it is ensured that
Waste water and/or solid matter in first reaction tank flow into wasteway with overflow type.
It is equipped with water distributor 39 in first reaction tank 6, which is located at inner bottom surface and the overflow of the first reaction tank
Between the top in road 37.On the one hand the setting of water distributor can be evenly distributed with waste water, the disturbance effect of lifting waste water itself；On the other hand,
After preventing shutdown, the solid matters such as medium are because weight is sunken to greatly bottom of pond, and when causing restarting, medium is difficult to be uniformly dispersed and lose
The case where effect, occurs.
The bottom of the sedimentation basin 8 is communicated with the 7th pump 19, and the discharge port of the 7th pump 19 is connected to wasteway 37；Also
The 8th including being sequentially communicated pumps 20, first medium separator 10, second medium separator 11 and medium cleaning device 12,
The bottom of the sedimentation basin 8 is connected to the feed inlet of the 8th pump, the media outlet of medium wiper mechanism 12 and the first reaction tank top
Portion's connection, such recyclable media realize the reuse of medium, further decrease cost for wastewater treatment.Preferably, first is situated between
Matter separator is cyclone separation device, and second medium separator is magnetic separating device.Two-stage dielectric film filter and medium cleaning
Device increases the applicability to a variety of media, while also having ensured the recovering effect of medium.
First reaction tank 6, the second reaction tank 7 and sedimentation basin 8 are separated by a hollow cabinet, and described second is anti-
The first baffle plate 38 and the second baffle plate 41 for being equipped with and being parallel to each other between pond 7 and sedimentation basin 8 are answered, the first baffle plate 38, which is located at, leads
Between flow cartridge and the second baffle plate, first baffle plate 38 is fixed on cabinet inner top surface, and second baffle plate 41 is fixed on
Cabinet inner bottom surface forms the baffling channel of connection the second reaction tank and sedimentation basin.First reaction tank 6, the second reaction tank 7 and precipitating
Pond integrated setting, occupied area is small, and can realize the continuous processing of waste water.
In the present invention, constructing tunnel waste water to be processed is passed through the first reaction tank from the first reaction bottom of pond portion, during being passed through
It can prevent precipitating from generating to having waste water and drug, medium generation stirring action in the first reaction tank, be also beneficial to mass transfer；
Then, waste water is gradually increasing in reaction tank, enters guide shell in the form of overflow wasteway, and similarly, waste water, which pours in, leads
When flow cartridge, stirring action can be generated to having waste water in guide shell, prevent from precipitating and promote mass transfer；Then, waste water is from guide shell
Top is spilled over in flocculation basin, and after spilling, waste water is flowed down along water conservancy diversion drum outer wall, to the floccule body (alumen ustum) of guide shell perimeter
Influence it is smaller, be conducive to the increase of floccule body and closely knit, promote flocculating effect；Again then, the waste water and wadding of bottom of pond portion of flocculating
Condensate flows into precipitation concentration pond, and further concentration, precipitating, obtain supernatant liquor and lower layer's flocculate or sludge.First reaction
In the case where not by agitating device preferable mass transfer mixing and anti-sedimentation effect can be realized, favorably in pond, the second reaction tank
In reducing operating cost, guarantee treatment effect.
The top of the sedimentation basin 8 is equipped with overflow weir 36, and inclined plate 35 is equipped with below overflow weir, is equipped with and scrapes below the inclined plate
Mud machine 34.
Shown first dosing tank, the second dosing tank, third dosing tank, the 4th dosing tank, medium add pond, the first reaction
The first agitating device 27, the second agitating device 28, third agitating device the 29, the 4th is respectively equipped on pond, the second reaction tank to stir
Device 30, the 5th agitating device 31, the 6th agitating device 32 and the 7th agitating device 33, wherein the stirring of the 7th agitating device
Paddle protrudes into guide shell 40.
The technique for meeting different water outlet requirements is further described below:
The system can realize that " integrated wastewater discharge standard " primary standard is discharged by following technique, and powder in constructing tunnel sewage
Thin object removal rate can reach 85% or more, and under identical treatment effect, cost saves 40 ~ 50% compared with traditional handicraft, equipment land occupation
Only the 15 ~ 20% of traditional handicraft.
The first stirring motor 27, third stirring motor 29 is opened to configure in the first dosing tank 1, third dosing tank 3 respectively
Certain density coagulant liquid pharmaceutical (0.1 ~ 1wt% of concentration) and high polymer coagulant liquid pharmaceutical (0.1 ~ 0.5wt% of concentration).
First the 13, first valve 21 of pump is opened, constructing tunnel waste water passes sequentially through the first pump 13, the first valve 21, first
Pipe-line mixer 26；Meanwhile opening third and pumping 14, third valve 23, coagulant is by third pump 14, third valve 23 into the
It is sufficiently mixed in one pipe-line mixer 26 with tunnel influent waste water；Constructing tunnel waste water after being sufficiently mixed with coagulant is from first
6 bottom of reaction tank enters the first reaction tank by water distributor 39, opens the 6th agitating device 32 and carries out sufficiently in the first reaction tank
Coagulating.When in influent waste water concentration of suspension be higher than 300mg/L, or (and) amount of inlet water be more than design water 50% and
When above, sand or magnetic powder are added as medium, after reinforcing coagulant into the first reaction tank 6 from 6 top of the first reaction tank
The effect of continuous precipitating, the first reaction bottom of pond portion water distributor design can prevent after equipment downtime medium because weight be sunken to greatly bottom of pond,
Restarting medium is caused to be difficult to the case where being uniformly dispersed and failing appearance.
After waste water stops the 0.5-1min time in the first reaction tank 6, by wasteway 37, from the second reaction bottom of pond portion into
Enter guide shell 40, opens the 5th pump 16, flocculant enters guide shell by the 5th pump 16, in the stirring of the 7th agitating device 33
Under, flocculant is sufficiently mixed with the waste water for entering guide shell 40, reacts, and biggish alumen ustum is formed, from 40 top overflow of guide shell
To the second reaction tank, after staying for some time, enter baffling channel from the bottom of the first baffle plate 38, by the top of sedimentation basin
Into sedimentation basin.
The waste water for forming alumen ustum carries out sloping plate deposition by inclined plate 35, and upper layer clear water is after overflow weir 36 enters clear water reserviors 9
Water outlet up to standard.The sludge of precipitating is scraped through mud scraper 34 to precipitating bottom, and partial sludge is back to the second reaction by the 7th pump 19
Pond 7.Excess sludge is pumped into after first medium separator 10 recycles through the 8th pump 20 and is discharged, remaining dirty when not adding medium
Mud is expelled directly out；When adding sand as medium, excess sludge lease making crosses first medium recyclable device 10, is recycled by eddy flow
Sand, the sand of recycling initially enter medium cleaning device 12 and are cleaned to remove surface contamination and subsequently enter the first reaction tank
6, excess sludge discharge；When adding magnetic powder as medium, excess sludge passes through first medium recyclable device 10(eddy flow point respectively
From device), second medium recyclable device 11(magnetic separating device) carry out eddy flow, Magneto separate two-stage recycling, the magnetic powder of recycling is first
It is cleaned into medium cleaning device 12 to remove surface contamination and subsequently enter the first reaction tank 6, excess sludge discharge.
Above-mentioned technique can greatly reduce added amount of chemical compared with traditional handicraft to reduce cost, improve upflow velocity to save
About take up an area, and there is good anti-shock loading and anti-variation water quality ability.The addition of the media such as magnetic powder, sand can promote
The aggregation of colloidal solid, formation using media particle as core to meet wadding body more bigger and tight than conventional coagulation flocculation structure
Close, the pollutant of absorption is more, settling property is more preferable；System waterpower condition design, by the shape for changing wadding body in coagulation process
At with growth conditions, make to react more abundant under less added amount of chemical, applicant's comparative evaluation discovery: water inlet SS be
The waste water of 800-1200mg/L, dosing coagulant 100mg/L, high polymer coagulant PAM 2mg/L, water outlet SS are 20-50mg/L；
Intake SS be 800-1200mg/L waste water, add magnetic powder 150mg/L as after medium (dosage of magnetic powder is although larger, but
It is magnetic powder recycling 90% or more), dosing coagulant 25mg/L, high polymer coagulant PAM 2mg/L, water outlet SS are 10-40mg/
L。
" water environment quality standard " (GB 3838-2002) I class standard can be realized by following technique using the system
Water outlet, to meet the requirement of ecological sensitive area environmental carrying capacity.
It is configured in the first dosing tank 1, the second dosing tank 2, third dosing tank 3, the 4th dosing tank 4 respectively certain density
Coagulant (0.1 ~ 1.0wt% of concentration), oxidant (1.0 ~ 5 wt % of concentration), high polymer coagulant (0.1 ~ 0.5 wt % of concentration),
Ammonia nitrogen removal agent (1.0 ~ 5 wt % of concentration) liquid pharmaceutical.
Pond 5 is added toward medium and adds a certain amount of Powdered Activated Carbon, opens first the 13, second valve 22 of pump, constructing tunnel
Waste water passes sequentially through the first pump 13, the second valve 22 adds pond, waste water and Powdered Activated Carbon into medium and adds in pond 5 in medium
It is uniformly mixed, stops after a certain period of time into the first reaction tank 6.It opens third and pumps the 14, the 4th valve 24, coagulant passes through third
From the first reaction tank after being sufficiently mixed in pump the 14, the 4th valve 24 entrance second pipe mixer 25 with constructing tunnel influent waste water
6 tops enter the first reaction tank 6；The 4th pump 15 is opened, oxidant enters the first reaction tank 6 by the 4th pump 15；Open the 6th
Pump 17, ammonia nitrogen removal agent enter the first reaction tank 6 by the 6th pump 17.Open the 6th agitating device 32, coagulant, oxidant,
Ammonia nitrogen removal agent, which is sufficiently mixed in the first reaction tank 6 with constructing tunnel waste water, reacts, in the first reaction tank 6, by coagulation,
Powder electroless plating, the oxidation of oxidant, ammonia nitrogen removal agent act on the removal of ammonia nitrogen, may be implemented part SS, P,
The removal of the pollutants such as COD, petroleum-type, ammonia nitrogen.It is restarted after every operation a period of time or shutdown, opens the first valve 21,
Make constructing tunnel waste water from bottom and top while intaking, strengthen mass transfer, the powder for being sink to bottom is made by bottom water inlet water distribution
Active carbon is distributed in the first reaction tank.
After waste water stays for some time in the first reaction tank 6, by wasteway 37, enter guide shell from guide shell bottom
40, the 5th pump 16 is opened, flocculant enters guide shell 40 by the 5th pump 16, under the stirring of the 7th agitating device 33, flocculation
Agent is sufficiently mixed with the waste water for entering guide shell 40, reacts, and forms biggish alumen ustum, anti-from 40 top overflow of guide shell to second
Pond 7 is answered, after staying for some time, enters baffling area 41 from the bottom of the first baffle plate 38, precipitating is entered by the top of sedimentation basin 8
Pond 8.In the second reaction tank 7, by flocculation, the further removal of pollutant is realized.
The waste water for forming alumen ustum passes through sloping plate deposition by inclined plate 35, and upper layer clear water is after overflow weir enters clear water reserviors 9 into 36
Water outlet up to standard.The sludge of precipitating scrapes high density precipitating bottom through mud scraper 34, and partial sludge is back to the by the 7th pump 19
Two reaction tanks 7.Excess sludge, through first medium recyclable device 10, recycles Powdered Activated Carbon by eddy flow, returns by the 8th pump 20
The Powdered Activated Carbon of receipts initially enters medium cleaning device 12 and is cleaned to remove surface contamination and subsequently enter the first reaction tank
6, excess sludge discharge.
Above-mentioned technique is compared with major pollutants SS, P, the COD, petroleum-type, ammonia that can be acted on by materialization in removal tunnel waste water
Nitrogen etc. makes water outlet reach " surface water by control medicament, the added amount of chemical of medium (Powdered Activated Carbon) and technical parameter
Environmental quality standards " (GB 3838-2002) I class standard, ensure that ecological sensitive areas domain constructing tunnel discharge of wastewater is not made environment
At threat.
The hardness of waste water can be reduced by following technique using the system, to meet the water quality requirement of TBM external application recirculated water,
It realizes the reuse of sewage, saves water.
Certain density coagulant, softening are configured in the first dosing tank 1, the second dosing tank 2, third dosing tank 3 respectively
Agent, high polymer coagulant liquid pharmaceutical, wherein the concentration of coagulant is 0.1 ~ 1wt% in corresponding liquid pharmaceutical, softening agent it is dense
Degree is 0.2 ~ 2wt%, and the concentration of high polymer coagulant is 0.1 ~ 0.5wt%.
First the 13, first valve 21 of pump is opened, constructing tunnel waste water passes sequentially through the first pump 13, the first valve 21, first
Pipe-line mixer 26；It opens third and pumps 14, third valve 23, coagulant enters the first pipe by third pump 14, third valve 23
It is sufficiently mixed in road mixer 26 with constructing tunnel influent waste water；Constructing tunnel waste water after being sufficiently mixed with coagulant is from first
6 bottom of reaction tank enters the first reaction tank by water distributor 39, opens the 6th agitating device 32 and carries out sufficiently in the first reaction tank
Softening reaction.
After waste water stays for some time in the first reaction tank 6, by wasteway 37, enters from the second reaction bottom of pond portion and lead
Flow cartridge 40 opens the 5th pump 16, and flocculant enters guide shell by the 5th pump 16, under the stirring of the 7th agitating device 33, wadding
Solidifying agent is sufficiently mixed with the waste water of entrance guide shell 40, reacts, and forms biggish alumen ustum, from 40 top overflow of guide shell to second
Reaction tank after staying for some time, enters baffling channel from the bottom of the first baffle plate 38, enters precipitating by the top of sedimentation basin
Pond.
The waste water for forming alumen ustum carries out sloping plate deposition by inclined plate 35, and upper layer clear water is after overflow weir 36 enters clear water reserviors 9
Water outlet up to standard.The sludge of precipitating scrapes high density precipitating bottom through mud scraper 34, and partial sludge is back to the by the 7th pump 19
Two reaction tanks 7.Other excess sludges are through 20 discharge of the 8th pump.
Above-mentioned technique can be led to by softening the pollutions such as SS, hardness in removal tunnel waste water synchronous with flocculation sedimentation effect
Control added amount of chemical and device technique parameter are crossed, water outlet can meet the water quality requirement of TBM external application recirculated water.
Optionally, coagulant of the invention is ternary built formula, by ordinary portland cement, flyash, polyaluminium
Aluminium composition, ordinary portland cement: flyash: the mass ratio of aluminium polychloride is 20 ~ 40:2 ~ 5:1.
Ordinary portland cement and flyash are all common materials in constructing tunnel, cheap, and it is convenient to obtain.Ternary
Micro constitutent SO in compounding coagulation agent system, in ordinary portland cement3、P2O5Aluminium salt hydrolysis-polymerization reaction is participated in, in gold
Bridge formation forms polynuclear complex between belonging to atom, improves the degree of polymerization of PAC to improve coagulation effect；And the SiO in cement2It is dissolved in water
There is very strong adsorption bridging ability to the micelle in water body afterwards, certain Coagulation aiding may be played to PAC coagulation；Flyash
Specific surface area is larger, has the porous spherical fine particle of certain activity and adsorption capacity, can increase the absorption property of wadding body,
Adsorb the pollutants such as COD, the heavy metal in waste water.
It is the constructing tunnel work of 200 ~ 500mg/L of SS, 60 ~ 100mg/L of COD, chromium 0.12mg/L for major pollutants
Sewage, it is 0.22 yuan/ton of water of 100mg/L(coagulant cost that coagulant, which uses the best dosage when PAC), after processing,
SS is 10 ~ 40mg/L, and COD is 30 ~ 50mg/L, and chromium is 0.04 ~ 0.08mg/L.It is best when coagulant is using ternary built system
Added amount of chemical is 0.21 yuan/ton of water of 600mg/L(coagulant cost), after processing, SS is 10 ~ 40mg/L, and COD is 6 ~ 12mg/
L, chromium are lower than 0.02mg/L.As it can be seen that ternary built system is than being used alone PAC as mixed under identical adding of agent cost
The removal rate of solidifying agent, COD and heavy metal is higher.
The content that above-described embodiment illustrates should be understood as that these embodiments are only used for being illustrated more clearly that the present invention, without
For limiting the scope of the invention, after the present invention has been read, those skilled in the art are to various equivalent forms of the invention
Modification each fall within the application range as defined in the appended claims.
Claims (10)
1. be used for constructing tunnel wastewater treatment system, which is characterized in that including the first dosing tank (1), be sequentially communicated first
Pump (13), the first valve (21), first pipe mixer (26), the first reaction tank (6), the second reaction tank (7) and sedimentation basin
(8), the discharge port of the first pipe mixer (26) is connected to the bottom of the first reaction tank (6)；It further include being sequentially communicated
Second valve (22), medium add pond (5), the second pump (18) and second pipe mixer (25), first pump (13) and the
The inlet communication of pipeline and the second valve (22) between one valve (21)；First dosing tank (1) respectively with first pipe
Mixer (26), second pipe mixer (25) connection.
2. system according to claim 1, which is characterized in that second valve (22) adds the top of pond (5) with medium
Portion's connection；Second pump (18) is connected to the bottom that medium adds pond (5).
3. system according to claim 1, which is characterized in that third pump (14) is communicated on first dosing tank (1),
The first pipe mixer (26), second pipe mixer (25) be parallel to third pump (14) outlet, third pump (14) with
Parallel branch between first pipe mixer (26) is equipped with third valve (23), and third pumps (14) and second pipe mixer
(25) parallel branch between is equipped with the 4th valve (24).
4. system according to claim 1, which is characterized in that further include the second dosing tank being connected to the first reaction tank
(2), the third dosing tank (3) being connected to the second reaction tank and the 4th dosing tank (4) being connected to the first reaction tank；Described second
Pipeline between dosing tank and the first reaction tank is equipped with the 4th pump (15), between the third dosing tank and the second reaction tank
Pipeline is equipped with the 5th pump (16), and the pipeline between the 4th dosing tank and the first reaction tank is equipped with the 6th pump (17).
5. system according to claim 1-4, which is characterized in that be equipped with top in second reaction tank (7)
It is open and is set to the guide shell (40) above the second reaction tank bottom surface, be equipped with wasteway (37) in first reaction tank (6),
The top of wasteway is connected to the first reaction tank, and the bottom end of wasteway is connected to the bottom of guide shell；The bottom of second reaction tank (7)
Portion is connected to the top of sedimentation basin (8).
6. system according to claim 5, which is characterized in that water distributor (39) are equipped in first reaction tank (6), it should
Water distributor (39) is located between the inner bottom surface of the first reaction tank and the top of wasteway (37).
7. system according to claim 5, which is characterized in that the bottom of the sedimentation basin (8) is communicated with the 7th pump (19),
The discharge port of 7th pump (19) is connected to wasteway (37)；It further include the 8th pump (20), the first medium point being sequentially communicated
From device (10), second medium separator (11) and medium cleaning device (12), the bottom of the sedimentation basin (8) and the 8th pump
Feed inlet connection, the media outlet of medium cleaning device (12) is connected to the first reaction tank top.
8. system according to claim 5, which is characterized in that first reaction tank (6), the second reaction tank (7) and heavy
Shallow lake pond (8) is separated by a hollow cabinet, is equipped between second reaction tank (7) and sedimentation basin (8) and is parallel to each other
First baffle plate (38) and the second baffle plate (41), the first baffle plate (38) are described between guide shell and the second baffle plate
First baffle plate (38) is fixed on cabinet inner top surface, and second baffle plate (41) is fixed on cabinet inner bottom surface, forms connection the
The baffling channel of two reaction tanks and sedimentation basin.
9. -4, the described in any item systems of 6-8 according to claim 1, which is characterized in that the top of the sedimentation basin (8) is equipped with
Overflow weir (36), overflow weir lower section are equipped with inclined plate (35), are equipped with mud scraper (34) below the inclined plate.
10. being used for the technique of constructing tunnel wastewater treatment, which is characterized in that using such as the described in any item systems of claim 1-9
System carries out, and includes the following steps:
S1, the first pump (13), the first valve (21) are opened, so that constructing tunnel waste water to be processed is directly entered the first reaction tank
(6)；Meanwhile coagulant is mixed into constructing tunnel waste water to be processed by first pipe mixer (26)；
Alternatively, the first pump (13), the second valve (21) are opened, so that constructing tunnel waste water to be processed enters medium and adds pond (5)
And the destination media in pond (5) is added with medium and is uniformly mixed；The second pump (18) are then turned on, so that medium adds Jie in pond
Matter, waste water mixture enter the first reaction tank (6), meanwhile, by being mixed into second pipe mixer (26) Xiang Suoshu mixture
Coagulant；
S2, at least one that oxidant, ammonia nitrogen removal agent are added into the first reaction tank (6), after stirring 5-10min, by tunnel
Waste water of constructing inputs the second reaction tank (7)；
Alternatively, after being directly stirred 0.5-1min to the constructing tunnel waste water in the first reaction tank (6), by constructing tunnel waste water
Input the second reaction tank (7)；
It is mixed into flocculant in S3, the constructing tunnel waste water in the second reaction tank (7), is reacted, floccule body is formed, is flocculated
Body, waste water mixture；
S4, the floccule body that S3 is obtained, waste water mixture input sedimentation basin (8), precipitated and separated obtain clear water on upper layer, under
Layer obtains excess sludge.
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