CN104831800A - Eco-friendly cascading-type concentrated seawater discharging method - Google Patents
Eco-friendly cascading-type concentrated seawater discharging method Download PDFInfo
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- CN104831800A CN104831800A CN201510159765.4A CN201510159765A CN104831800A CN 104831800 A CN104831800 A CN 104831800A CN 201510159765 A CN201510159765 A CN 201510159765A CN 104831800 A CN104831800 A CN 104831800A
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Abstract
The invention discloses an eco-friendly cascading-type concentrated seawater discharging method, which comprises steps of presetting, putting into production and capacity expansion. If the concentrated seawater discharging amount is further expanded according to requirements of a post project, a flange seal head at the tail end of a releasing straight trunk pipe is opened, a slightly large pipe diameter construction space is preserved, corresponding expansion is executed conveniently, a buoyancy force is provided, and an original newly-cut pine block can be removed conveniently. As a certain buoyancy force is provided while expansion is facilitated, a corresponding matched buoyancy force can be provided for the overall device. Advantages of good preservation and quick construction are provided, and emergency treatment demands can be met. In order to facilitate expansion of the releasing straight trunk pipe, a column-shaped object whose diameter is slightly larger than that of the releasing straight trunk pipe is additionally arranged at the tail end of the releasing straight trunk pipe. The eco-friendly cascading-type concentrated seawater discharging method has the advantages that bottom seawater can be used for diluting; resistance loss is low; diluting effects are good; an engineering preservation degree is good; landslide is prevented; and a capacity expansion emergency ability is strong.
Description
Technical field
The present invention relates to a kind of environmental concentrated seawater row sea diffusion to produce and method for increasing, particularly relate to Eco-friendly tandem type concentrated seawater discharge method.
Background technology
At present, China builds the kiloton and ton demonstration project with independent intellectual property right.Multiple tons such as Tianjin, Zhejiang, Hebei, Qingdao, Dalian and 10 ton seawater utilization engineerings are gone into operation operation in succession.And the desalinization cause of China is in the flourish primary stage at present, the ratio accounting for China's fresh water use amount is very little, but great efforts, the prospect of development are good.Expect 2015, China's desalinization ability will reach 220 ten thousand to 260 ten thousand steres/day generally, increase the contribution rate of fresh water output newly to more than 15% to coastal water-deficient region.
Along with the enforcement of extensive Seawater Desalination Project, the emission problem of a large amount of high salinity concentrated seawaters of its by-product attracts attention.Existing method for desalting seawater Water Sproading rate is lower, and the Water Sproading rate of hot method sea water desalinating unit is 15%-50%, and the Water Sproading rate of Membrane seawater desalination device is only 30%-40%, and all the other most of seawater strong brine after desalination is directly flow back to sea.Though have no the report that middle and small scale Seawater Desalination Project has a significant effect to environment, in major works, especially in closed marine site, the impact of high salinity concentrated seawater on ecological environment is apparent.Discharge the composition of strong brine, concentration, heat, corrosion product and cleaning discharge water etc. and had a strong impact on marine environment, ocean water quality, ecological environment and marine organisms are had a negative impact.
For solving the problem, Chinese utility model patent " a kind of seabeach drain structure for water ", notification number 202380564U, open seabeach row Haikou device and structure thereof.Although corresponding device structure is simple, easy for installation, its control for cobble granule density and arrange extra large energy consumption and still have much room for improvement.Meanwhile, known technology is not enough for the consideration of the pre-Office Copy of engineering, is difficult to the row's sea requirement meeting later stage engineering development.The method that usual employing new equipment changes used equipment makes up, and so significantly increases running cost and the renewal of the equipment expense of device.
Summary of the invention
The object of the invention is to provide a kind of for prior art and can utilize that bottom seawater dilutes, drag losses is low, dilution effect good, there is the pre-Office Copy of good engineering while prevent from coming down, Eco-friendly tandem type concentrated seawater discharge method that dilatation emergency capability is strong.
The present invention solves the problems of the technologies described above adopted technical scheme: Eco-friendly tandem type concentrated seawater discharge method, comprises, wherein: comprise the steps,
1. foresee steps: tandem type concentrated seawater row is gone back disperser and is layed on sea bed; Tandem type concentrated seawater is arranged extra large disperser and is comprised release straight main and the diffusion arm being connected to straight main side of releasing; To release straight main endcapped, and be connected with and newly cut pine block; The diameter newly cutting pine block is more than or equal to the diameter of straight main of releasing;
2. placing step: need to set up duckbill valve on diffusion arm according to discharge value and maybe the water outside diffusion tube end can be sucked and the cascade mixing tube of again discharging after mixing;
3. dilatation step: removed by endcapped, and remove and newly cut pine block, is then connected to former straight main end of releasing with another section of new straight main of releasing and carries out prolongations operation, and the end of closed new straight main of releasing; Connect one section at the end of new straight main of releasing and newly cut pine block, return step 2..If later stage engine request expands the discharge value of concentrated seawater further, the flange end socket of straight main end of releasing can be opened, the construction space of reserved bigger caliber is extremely convenient to implement corresponding extension, possesses buoyancy and is also convenient to former pine block of newly cutting to remove.While being convenient to extend, there is certain buoyancy, corresponding adaptive buoyancy can be provided to whole device.There is the advantage of well pre-Office Copy and rapid construction, the demand of emergency processing can be met.For the ease of the extension of straight main of releasing, the column that a joint diameter is a bit larger tham straight dry tube diameter of releasing is installed additional at straight main end of releasing, this column need have corrosion-resistant, and density can not be excessive characteristic, can select newly to cut pine, hollow out lead block, HDPE clad pipe etc., wherein preferably HDPE clad pipe, newly cut pine.
For optimizing technique scheme, the measure taked also comprises: cascade mixing tube comprises the playpipe that can be connected with diffusion arm; Cascade mixing tube also has the anemostat of the hollow that one is connected with playpipe gap, and playpipe is connected and fixed anemostat through built on stilts.Playpipe and the cascade mixing tube of diffusion arm adopt Flange joint.Can adopt engineering plastics flange, lining fluorine flange, zinc-plated flange etc., wherein consider the preferred zinc-plated flange of cost.The bottom seawater that prior art is ignored can be participated in by the cascade mixing tube set up as required waters down in mixing, to water down mixed decomposition is two steps, namely the existing seawater by sucking outside diffusion arm of the first step and the concentrated seawater spread in arm carry out first time and mix, then spraying at anemostat end is again mix with nature seawater to water down, thus the length by extending diffusion arm can make to utilize the region of nature seawater more to disperse, and reduces many to environment stress.Thus reach increase designing and arranging high-volume, reduce volume increase cost, because cascade mixing tube is demountable, thus there is emergency function.Anemostat middle inside has the stringcourse narrowed and narrows structure; The ratio that the interior bead diameter of the jet of playpipe and stringcourse are narrowed to the distance of this jet is 1:1.7 to 1:2.5.Freshwater-seawater mixing effect in this interval is better, and technical ability reaches designing requirement, simultaneously difficulty of construction also rather moderate, and the technological requirement of parts is also easier to meet.Built on stilts connection adopts the first anchor ear connected through connecting rod to be connected playpipe and anemostat with the second anchor ear.Connecting rod is circumferentially uniformly distributed, and thus reduces the resistance of Seawater inhalation, at utmost ensures that the mixing of seawater waters down effect.Anemostat end is connected with duckbill valve; Described duckbill valve adopts neoprene or Hai Pulong or acrylonitrile-butadiene rubber or EP rubbers.Selection will have decay resistance, preferred neoprene duckbill valve.Straight main of releasing need possess anti-corrosive properties and pressure-bearing property; Straight main of releasing is provided with inverted U dead bolt; The caliber of diffusion arm increases to straight main end of releasing successively from straight main base portion of releasing.Structure without duckbill valve on the downside of the diffusion branch diameter increased successively and upper duckbill valve can make permutation arm emission flow comparatively balance, and causes local concentration excessive by preventing indivedual arm delivery flow excessive and affects environment.Can choice for use HDPE clad pipe, three layer construction PE pipe, interior outer lining moulds stainless Guan Gang, individual layer External fusion bonded epoxy coating pipe etc., preferred HDPE clad pipe and PE pipe.Two end winding support of inverted U dead bolt are bottom seabeach.Diffusion arm be positioned at above straight main of releasing, and spread arm be clearance-type straight line arrange.The spacing of described diffusion arm is equal, but the diameter of diffusion arm expands towards straight main end direction of releasing.Described diffusion arm and main of releasing straight between and spread and all use Flange joint between arm and duckbill valve.To release straight main and newly cut outside pine block and be also provided with fixing fitting; Fixing fitting comprises and to be coated on below straight main of releasing and the thin fill of both sides and the covering layer that covers above straight main of releasing; It is riprap layer on the downside of thin fill; Covering layer contains concrete or mud or its and combines; Above covering layer, near top is provided with jackstone or pouring weight.Because straight main of releasing need be imbedded in thin filling nitride layer, and riprap layer props up the end straight main that prevents from releasing glides.Need if having in the future to extend straight main of releasing, again need excavate thin filling nitride layer and riprap layer, therefore can increase the cost of this operation.To release one-shot forming after the concrete process of straight main top, comparatively firmly, newly cutting pine block and effectively can prevent the problem that in prior art, pipeline glides in conjunction with bottom.Mud is adopted to reduce costs, and easy construction, practical effect also can reach engine request, can be used as preferred half-way house.
Comprise the steps owing to present invention employs,
1. foresee steps: tandem type concentrated seawater row is gone back disperser and is layed on sea bed; Tandem type concentrated seawater is arranged extra large disperser and is comprised release straight main and the diffusion arm being connected to straight main side of releasing; To release straight main endcapped, and be connected with and newly cut pine block; The diameter newly cutting pine block is more than or equal to the diameter of straight main of releasing;
2. placing step: need to set up duckbill valve on diffusion arm according to discharge value and maybe the water outside diffusion tube end can be sucked and the cascade mixing tube of again discharging after mixing;
3. dilatation step: removed by endcapped, and remove and newly cut pine block, is then connected to former straight main end of releasing with another section of new straight main of releasing and carries out prolongations operation, and the end of closed new straight main of releasing; Connect one section at the end of new straight main of releasing and newly cut pine block, return step 2..If later stage engine request expands the discharge value of concentrated seawater further, the flange end socket of straight main end of releasing can be opened, the construction space of reserved bigger caliber is extremely convenient to implement corresponding extension, possesses buoyancy and is also convenient to former pine block of newly cutting to remove.While being convenient to extend, there is certain buoyancy, corresponding adaptive buoyancy can be provided to whole device.There is the advantage of well pre-Office Copy and rapid construction, the demand of emergency processing can be met.For the ease of the extension of straight main of releasing, the column that a joint diameter is a bit larger tham straight dry tube diameter of releasing is installed additional at straight main end of releasing, this column need have corrosion-resistant, and density can not be excessive characteristic, can select newly to cut pine, hollow out lead block, HDPE clad pipe etc., wherein preferably HDPE clad pipe, newly cut pine.Thus the present invention have can utilize that bottom seawater dilutes, drag losses is low, dilution effect good, there is the pre-Office Copy of good engineering while prevent from coming down, advantage that dilatation emergency capability is strong.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention flow chart of steps;
Fig. 2 is embodiment of the present invention structural representation;
Fig. 3 is embodiment of the present invention cascade mixing tube structural representation.
Detailed description of the invention
Below in conjunction with attached embodiment, the present invention is described in further detail.
Drawing reference numeral illustrates: straight main 1 of releasing, duckbill valve 2, diffusion arm 3, inverted U dead bolt 4, flange end socket 5, newly cut pine block 6, thin fill 7, jackstone 8, cascade mixing tube 9, playpipe 91, jet 91a, anemostat 92, mixing mouth 92a, stringcourse narrow 92b, the first anchor ear 93, second anchor ear 94, connecting rod 95.
Embodiment: referring to figs. 1 through Fig. 3, Eco-friendly tandem type concentrated seawater discharge method, comprises, wherein: comprise the steps,
1. foresee steps: tandem type concentrated seawater row is gone back disperser and is layed on sea bed; Tandem type concentrated seawater is arranged extra large disperser and is comprised release straight main 1 and the diffusion arm 3 being connected to straight main side of releasing; To release straight main 1 endcapped, and be connected with and newly cut pine block 6; The diameter newly cutting pine block 6 is more than or equal to the diameter of straight main 1 of releasing;
2. placing step: need to set up duckbill valve 2 on diffusion arm 3 according to discharge value and maybe the water outside diffusion arm 3 end can be sucked and the cascade mixing tube 9 of again discharging after mixing;
3. dilatation step: removed by endcapped, and remove and newly cut pine block 6, is then connected to former straight main 1 end of releasing with another section of new straight main 1 of releasing and carries out prolongations operation, and the end of closed new straight main 1 of releasing; Connect one section at the end of new straight main 1 of releasing and newly cut pine block 6, return step 2..If later stage engine request expands the discharge value of concentrated seawater further, the flange end socket 5 of straight main 1 end of releasing can be opened, the construction space of reserved bigger caliber is extremely convenient to implement corresponding extension, possesses buoyancy and is also convenient to former pine block 6 of newly cutting to remove.While being convenient to extend, there is certain buoyancy, corresponding adaptive buoyancy can be provided to whole device.There is the advantage of well pre-Office Copy and rapid construction, the demand of emergency processing can be met.For the ease of the extension of straight main of releasing, the column that a joint diameter is a bit larger tham straight dry tube diameter of releasing is installed additional at straight main end of releasing, this column need have corrosion-resistant, and density can not be excessive characteristic, can select newly to cut pine, hollow out lead block, HDPE clad pipe etc., wherein preferably HDPE clad pipe, newly cut pine.Cascade mixing tube 9 comprises the playpipe 91 that can be connected with diffusion arm 3; Cascade mixing tube 9 also has the anemostat 92 of the hollow that one is connected with playpipe 91 gap, and playpipe 91 is connected and fixed anemostat 92 through built on stilts.The playpipe 91 of diffusion arm 3 adopts Flange joint with cascade mixing tube 9.Can adopt engineering plastics flange, lining fluorine flange, zinc-plated flange etc., wherein consider the preferred zinc-plated flange of cost.The bottom seawater that prior art is ignored can be participated in by the cascade mixing tube 9 set up as required waters down in mixing, to water down mixed decomposition is two steps, namely the existing seawater by sucking outside diffusion arm 3 of the first step and the concentrated seawater spread in arm 3 carry out first time and mix, then spraying at anemostat 92 end is again mix with nature seawater to water down, thus the length by extending diffusion arm 3 can make to utilize the region of nature seawater more to disperse, and reduces many to environment stress.Thus reach increase designing and arranging high-volume, reduce volume increase cost, because cascade mixing tube 9 is demountable, thus there is emergency function.Anemostat 92 middle inside has the stringcourse narrowed and narrows 92b structure; It is 1:1.7 to 1:2.5 that the interior bead diameter of the jet 91a of playpipe 91 and stringcourse narrow 92b to the ratio of the distance of this jet 91a.Freshwater-seawater mixing effect in this interval is better, and technical ability reaches designing requirement, simultaneously difficulty of construction also rather moderate, and the technological requirement of parts is also easier to meet.Built on stilts connection adopts the first anchor ear 93 connected through connecting rod 95 to be connected playpipe 91 and anemostat 92 with the second anchor ear 94.Connecting rod 95 is circumferentially uniformly distributed, and thus reduces the resistance of Seawater inhalation, at utmost ensures that the mixing of seawater waters down effect.Anemostat 92 end is connected with duckbill valve 2; Described duckbill valve 2 adopts neoprene or Hai Pulong or acrylonitrile-butadiene rubber or EP rubbers.Selection will have decay resistance, preferred neoprene duckbill valve.Straight main 1 of releasing need possess anti-corrosive properties and pressure-bearing property; Straight main 1 of releasing is provided with inverted U dead bolt 4; The caliber of diffusion arm 3 increases to straight main 1 end of releasing successively from straight main 1 base portion of releasing.Structure without duckbill valve 2 on the downside of diffusion arm 3 caliber increased successively and upper duckbill valve 2 can make permutation arm emission flow comparatively balance, and causes local concentration excessive by preventing indivedual arm delivery flow excessive and affects environment.Can choice for use HDPE clad pipe, three layer construction PE pipe, interior outer lining moulds stainless Guan Gang, individual layer External fusion bonded epoxy coating pipe etc., preferred HDPE clad pipe and PE pipe.Two end winding support of inverted U dead bolt 4 are bottom seabeach.Diffusion arm 3 is positioned at above straight main 1 of releasing, and spreads arm 3 arrangement in clearance-type straight line.The spacing of described diffusion arm is equal, but the diameter of diffusion arm expands towards straight main end direction of releasing.Described diffusion arm and main of releasing straight between and spread and all use Flange joint between arm and duckbill valve.Release straight main 1 and newly cut pine block (6) outside be also provided with fixing fitting; Fixing fitting comprises and to be coated on below straight main 1 of releasing and the thin fill 7 of both sides and the covering layer that covers above straight main 1 of releasing; It is jackstone 8 layers on the downside of thin fill 7; Covering layer contains concrete or mud or its and combines; Above covering layer, near top is provided with jackstone or pouring weight.Owing to releasing, straight main 1 need be imbedded in thin fill 7 layers, and riprap layer 8 props up the end straight main 1 that prevents from releasing glides.Need to extend straight main 1 of releasing if having in the future, again need excavate thin fill 7 layers and jackstone 8 layers, therefore can increase the cost of this operation.To release one-shot forming after straight main 1 top concrete process, comparatively firmly, newly cutting pine block 6 and effectively can prevent the problem that in prior art, pipeline glides in conjunction with bottom.Mud is adopted to reduce costs, and easy construction, practical effect also can reach engine request, can be used as preferred half-way house.
The present embodiment design will be applied to the concentrated seawater row sea of southeastern coast island seawater desalting plant, and three phase final scales of this seawater desalting plant will reach daily output 100,000 tons of desalination waters.First phase scale is contemplated to day 20,000 tons of desalination waters, and second phase scale is contemplated to daily output 60,000 tons of desalination waters.Wherein, the construction of the third stage of the project is according to local demand and enterprise development requirement.Therefore during design concentrated seawater drain pipe arrangements, the flow upper limit is according to discharging 60,000 tons of concentrated seawater meters day, and reserve according to discharging 100,000 tons of concentrated seawaters day, and continue to set up cascade mixing tube 9 when increasing at daily output, increase and decrease duckbill valve as required, to improve diffusion effect further according to row's situation outside manufacturer temporarily.
1. plant bulk design
The paper examines parameter of concentrated seawater row sea diffusion is design initial dilution Sc, and this parameter is relevant to the factor such as current, tide in marine site, place.According to local hydrologic condition, " polluter smoking pipe works technical specification " (GB19570-2000) and industrial wastewater discharge relevant criterion, design initially degree of releasing Sc is greater than 70.When initially degree of releasing is 75-80 in design, according to hydrodynamics and plant area's concentrated seawater discharge maximum stream flow requirement, the diameter range of straight main of determining to release can be DN500-DN900, and the present embodiment selects the HDPE clad pipe of DN600 as straight main of releasing.
Though the design discharge of the present embodiment, according to daily output 60,000 tons of fresh water meters of the second stage of the project, considers that the duration is longer, after first stage of the project is gone into operation, first offer first three in five diffusers, and two of end diffuser flanges are shut.The diameter range of diffusion arm is at DN250-DN450, and first three diffusion arm diameter of the present embodiment selects DN300, and end two diffusion arm selects DN400, simultaneously choice for use neoprene duckbill valve.Increase according to output sets up duckbill valve gradually, then sets up cascade mixing tube 9 again, is increasing the release length of straight main 1 and the quantity of corresponding arm and appurtenances further.
2. device construction
1) to ditch in advance construction
The shallow water dredge boat that the present embodiment adopts common shallow water barge to repack into, namely pretends guide pile system in the both sides of flat-bottomed barge, is drawn and advances, fix common road hydraulic pressure reverse above deck to forklift by civilian cable, is used for ditching.After having ditched immediately under the cooperation of diver, spread the thick jackstone of 400-600mm at bottom of trench, and lay the thick thin filling nitride layer of 150-250mm thereon.
2) pipe laying construction
Establish on thin filling nitride layer upper berth straight main of releasing, lay the HDPE clad pipe of long 10-20 Miho Dockyard N600-DN700 at the end of straight main of releasing.Finally be fixed release straight main and HDPE clad pipe with the stake that fixes of the door type 40# channel-section steel of long 10-15 rice, the spacing between two spud piles is 4-8 rice.
3) backfill construction
Back-filling way comprises nature backfill and artificial backfill two kinds of modes.Naturally backfilled by natural mud after backfill refers to pipe laying, artificial backfill is backfilled by mode that is artificial and mechanical bond after referring to pipe laying.This example adopts the mode of nature backfill and artificial backfill, has both met the needs of engineering, and has again reduced cost simultaneously.
Although describe the present invention in conjunction with preferred embodiment; so itself and be not used to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; can implement various change, the displacement of coordinate and amendment here to the theme listed, therefore protection scope of the present invention be as the criterion when the scope limited depending on proposed claim.
Claims (8)
1. Eco-friendly tandem type concentrated seawater discharge method, is characterized in that: comprise the steps,
1. foresee steps: tandem type concentrated seawater row is gone back disperser and is layed on sea bed; Described tandem type concentrated seawater is arranged extra large disperser and is comprised and release straight main (1) and be connected to the diffusion arm (3) of described straight main side of releasing; Described straight main (1) endcapped of releasing, and be connected with default balance pipe fitting; The diameter of described default balance pipe fitting is more than or equal to the diameter of described straight main (1) of releasing;
2. placing step: need to set up duckbill valve (2) on described diffusion arm (3) according to discharge value and maybe the water outside described diffusion arm (3) end can be sucked and the cascade mixing tube (9) of again discharging after mixing;
3. dilatation step: described endcapped is removed, and remove and newly cut pine block (6), then be connected to former straight main (1) end of releasing with another section of new straight main (1) of releasing and carry out prolongation operation, and close the end of described new straight main (1) of releasing; Connect one section at the end of described new straight main (1) of releasing and preset balance pipe fitting, return step 2..
2. Eco-friendly tandem type concentrated seawater discharge method according to claim 1, is characterized in that: described cascade mixing tube (9) comprises the playpipe (91) that can be connected with described diffusion arm (3); Described cascade mixing tube (9) also has the anemostat (92) of the hollow that one is connected with described playpipe (91) gap, and playpipe (91) is connected and fixed anemostat (92) through built on stilts.
3. Eco-friendly tandem type concentrated seawater discharge method according to claim 2, is characterized in that: described anemostat (92) middle inside has the stringcourse narrowed and narrows (92b) structure; It is 1:1.7 to 1:2.5 that the interior bead diameter of the jet (91a) of described playpipe (91) and described stringcourse narrow (92b) to the ratio of the distance of this jet (91a).
4. Eco-friendly tandem type concentrated seawater discharge method according to claim 2, is characterized in that: described built on stilts connect the first anchor ear (93) adopting and connect through connecting rod (95) be connected with the second anchor ear (94) described in playpipe (91) and anemostat (92).
5. Eco-friendly tandem type concentrated seawater discharge method according to claim 2, is characterized in that: described anemostat (92) end is connected with duckbill valve (2); Described duckbill valve (2) adopts neoprene or Hai Pulong or acrylonitrile-butadiene rubber or EP rubbers.
6. Eco-friendly tandem type concentrated seawater discharge method according to claim 1, is characterized in that: described straight main (1) of releasing need possess anti-corrosive properties and pressure-bearing property; Described straight main (1) of releasing is provided with inverted U dead bolt (4); The caliber of described diffusion arm (3) increases to straight main (1) end of releasing successively from described straight main (1) base portion of releasing; Described default balance pipe fitting is for newly to cut pine block (6).
7. Eco-friendly tandem type concentrated seawater discharge method according to claim 1, is characterized in that: described diffusion arm (3) is positioned at straight main (1) top of releasing, and spreads arm (3) and arrange in clearance-type straight line.
8. Eco-friendly tandem type concentrated seawater discharge method according to claim 1, is characterized in that: be also provided with fixing fitting outside described release straight main (1) and default balance pipe fitting; Described fixing fitting comprises the thin fill (7) being coated on described release straight main (1) below and both sides and the covering layer covering described straight main (1) top of releasing; Described thin fill (7) downside is jackstone (8) layer; Described covering layer contains concrete or mud or its and combines; Above described covering layer, near top is provided with jackstone or pouring weight.
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