CN103922497B - Three-stage pressure-reducing V-shaped hydraulic cyclone air floatation device - Google Patents

Three-stage pressure-reducing V-shaped hydraulic cyclone air floatation device Download PDF

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CN103922497B
CN103922497B CN201410148891.5A CN201410148891A CN103922497B CN 103922497 B CN103922497 B CN 103922497B CN 201410148891 A CN201410148891 A CN 201410148891A CN 103922497 B CN103922497 B CN 103922497B
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swirler
liquid
oil
air
tank
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CN103922497A (en
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刘春花
刘新福
张明
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China University of Petroleum Beijing CUPB
China University of Petroleum UPC East China
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China University of Petroleum UPC East China
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Abstract

The invention provides a three-stage pressure-reducing V-shaped hydraulic cyclone air floatation device which is applied to efficient treatment of oil-containing sewage and industrial wastewater. Gas-liquid phase current tangentially enters a three-stage cyclone to form rotary motion, oil, gas and water are separated in a centrifugal force field, water is thrown into a water collecting barrel, meanwhile the pressure is reduced gradually and momentarily by virtue of a three-stage cyclone cone and guide vanes, and sump oil is attached to micro-bubbles and is brought into an oil collecting pipe, so that efficient purification treatment of production water is realized; the treatment capacity can be adjusted by changing the axial distances among different stages of cyclones, so that the device is wide in application range; a back flushing cleaning liquid is used for flushing a tank body comprehensively by virtue of a flushing pipe, so that a component self-flushing function is realized; liquid-carrying air current is turned into clean gas by means of triple separation of a liquid collector, a rectifier and a screen liquid filter, so that a gas self-cleaning function is realized; a pressure safety valve, a liquid-level-difference transmitter and a liquid level control valve are arranged, so that the automatic degree of the device is increased; the entire set of device is compact in structure, and easy to install, operate and maintain.

Description

Three grades of buck V shape hydrocyclone air-floating apparatus
Technical field
The present invention relates to the hydrocyclone air-floating apparatus of a kind of oily(waste)water and the efficient treatment system of trade effluent, particularly relate to the production water efficient degreasing refining plant of a kind of offshore platform cyclone air-flotation integration.
Background technology
Along with land and increasing that is marine oil gas field Exploitation Depth, the water content of oil field produce oil is also increasing gradually, especially high water-cut stage and tertiary oil recovery phase are entered for oil-gas field, make the average moisture content in output oil reach more than 90%, simultaneously the intractability also corresponding increase of oily(waste)water.
At present, apply in oily(waste)water and industrial wastewater treatment system and more have pressurized dissolved air flotation, induction flotation and compact type air supporting.Heterogeneous air dissolved pump air-flotation system completes water supercharging in a heterogeneous air dissolved pump, gas sucks and dissolve shear history, the configuration of this system is simple, running maintenance is easy, but the Cost Problems of its power consumption and pump self is very important, and heterogeneous air dissolved pump also exists stronger emulsification pretreatment effect to former water, the significantly reduction of purification efficiency can be caused.Waterpower induction flotation, i.e. jet air float, the power consumption of this technology is low, and do not have rotatable parts in ejector or high speed Venturi tube, shearing force is less simultaneously, the broken loose of adherend can not be caused, but the microbubble particle diameter of generation is comparatively large, and its efficiency is larger by the impact in ejector or high speed Venturi exit aperture, comparatively harsh to the water quality and pressure requirements that enter nozzle, less fluctuation may affect greatly purification efficiency.Compact type air supporting air supporting and cyclone separation process is integrated to process offshore platform output content from oil well, to save space and to lighten the load, as CrudeSep, the compact type air supporting CFU of Epcon company of Norway, the VorSep etc. of German Siemens company of U.S. CE TCO Technology A. S., but be domesticly at present still in the starting stage.
In sum, there is many problems in existing pressurized dissolved air flotation and induction flotation in applying at the scene, up-to-date compact type air supporting research is also just in the starting stage, rely on the basis of existing practicable techniques for this reason, employ new technology simultaneously, novel material and complete processing, develop novel hydropower cyclone air-flotation integrated apparatus, this device is in South China current rose (LH) oil field, good effect is achieved after the offshore platform tests such as Qinhuangdao, the Bohai Sea (QHD) oil field, indices after oily(waste)water (production water) purification meets " offshore oil exploration and exploitation Pollutant emission concentration limit value " one-level row seamark standard that National Bureau of Oceanography promulgates, achieve the needs that offshore platform oily(waste)water efficiently processes.
Summary of the invention
In order to overcome defect and the deficiency of the existence of existing air flotation technology, and improve the present Research that domestic compact type air supporting is still in the starting stage, the object of this invention is to provide three grades of buck V-arrangement hydrocyclone air-floating apparatus of a kind of applicable oily(waste)water and industrial wastewater air flotation process.Hydrocyclone and air supporting two kinds of oily water separation techniques organically combine by this hydrocyclone air-floating apparatus, and according to the special construction of V-arrangement and the treatment process of three grades of step-downs, possesses compact construction, produce the process of water high-efficient purification, treatment capacity wide accommodation, parts are from rinsing and gas automatically cleaning, and level of automation is high, is easy to the features such as installation, operation and maintenance.
The technical solution adopted for the present invention to solve the technical problems is a kind of three grades of buck V-arrangement hydrocyclone air-floating apparatus of exploitation, primarily of a few part composition such as air flotation tank, three swirler device, oil header, liquid trap, gasotron, silk screen fluid strainer, liquid-inlet pipe, oil outlet pipe, rising pipe, blow-off pipe.Gas-liquid two-phase flows through liquid-inlet pipe and tangentially enters three swirler device formation rotary motion, at the large water of centrifuge field Midst density gradually upwards and get rid of into Water collecting tube, oil droplet and micro bubble etc. are progressively migrated to oil header formation wick, and its Midst density less micro bubble migration and ascent rate comparatively fast add both touch opportunity, oil droplet and micro bubble adherend is formed by constantly contacting and adhering to, meanwhile, through the swirler conical surface at different levels and guide vane progressively step-down and in conjunction with the moment step-down between three swirler device, microbubble intensive in a large number is constantly discharged in biphase gas and liquid flow, in adherend uphill process, oil droplet and microbubble fully mixes, sump oil containing oil droplet and suspended substance is attached on microbubble and brings in oil header, thus reach desirable deoiling effect, sump oil after separation is discharged through oil outlet pipe, and water is discharged through rising pipe.With liquid air-flow through liquid trap and gasotron baffle plate initial gross separation, compared with larger oil droplet gasotron corrugated board structures surface collision and coalescent and small grain size oil droplet in silk screen fluid strainer silk screen cake inertial impaction, silk screen interception with pedesis trapping and coalescent triple separation become clean air and discharge through vapor pipe.
Air flotation tank material selection pressure vessel material Q345R, tank chamber entire body inner liner stainless steel 316L or two-way stainless steel.Air flotation tank adopts the structure of vertical vessel, be divided into end socket and tank body two portions, top adopts circular plate type end socket, and end socket edge is evenly arranged 24 ~ 48 screws, be connected by the tank flange dish of studs and bottom, sealed by nitrile rubber pad between end socket and tank body.End socket and tank body junction are all designed with boss, and end socket central part is processed with cylindricality eyelet, and eye diameter equals oil outlet pipe external diameter; End socket surrounding is along the circumferential direction evenly arranged four washpipes, and during backsurging operation, scavenging solution enters air flotation tank through four washpipes simultaneously, ensures to carry out comprehensive flushing to each parts in tank body; Be furnished with vapor pipe between pressure security valve union and oil outlet pipe, the clean air after triple separation is discharged air flotation tank from vapor pipe.
The tank body top of air flotation tank adopts column-shaped barrel, bottom employing tapering is the divergent-cone wall of 50 °, and bottom it, adopting saddle type to seal body, on saddle type envelope body, the conical surface of end curved surface and its upper cone shape cylindrical shell is tangent, and whole air flotation tank presents the structure of V-arrangement class sub warhead thus.The Water collecting tube of Dual-barrel-shaped is formed between tank body middle and lower part and three swirler device, be used for collecting and produce the aqueous phase after Water warfare, the taper configurations of Water collecting tube can ensure that aqueous phase falls into bottom Water collecting tube in the mode of rotating fluid after collecting simultaneously, a small amount of microbubble residual in further water phase separated.Central part bottom tank body saddle type envelope body is welded with cylindricality and receives slag cylinder, employing tapering in receipts slag cylinder inner ring surface top is the back taper of 40 ° and bottom adopts the cylindricality with blow-off pipe same inner diameter, to ensure that the solid particulates such as the isolated greasy filth of three swirler device institute fall into receipts slag cylinder smoothly and enter in blow-off pipe; The surrounding receiving slag cylinder lower surface is evenly arranged eight screw holes.
End socket washpipe place is circumferentially furnished with pressure security valve union, and connects with pressure safety valve with ring flange, and when air flotation tank internal pressure exceedes limit value and occurs dangerous working condition, pressure safety valve is by the automatic relief pressure of mechanical effect; The tank wall on oil header upper end and rising pipe top is provided with upper and lower two liquid level difference transmitter joints, liquid level difference transmitter detects the liquid level difference of aqueous phase in tank body Water collecting tube automatically, and change the highest liquid level and minimum liquid level signal into electric signal, implement high liquid level and low liquid level warning and high liquid level and low liquid level and turn off operation.The tank wall of oil header upper end is designed with Liquid level valve union, is arranged symmetrically with upper liquid level difference transmitter joint 180 °, the liquid level of the level control valve automatic detection oil pipe that it is installed also controls the blowdown oil mass of oil outlet pipe.
Liquid-inlet pipe enters the passage of first step swirler as biphase gas and liquid flow, be positioned at the tank base of air flotation tank, liquid-inlet pipe is divided into two pipelines of the 180 ° of reversed arrangement in left and right, and each liquid-inlet pipe runs through the saddle type envelope body of tank body respectively and it exports the cone eddy flow section tangentially entering first step swirler; Liquid-inlet pipe outlet is along tank body is axially evenly distributed successively and each outlet is concordant with the blade face of correspondence position guide vane, and guarantee biphase gas and liquid flow is cut the guide vane of first step swirler smoothly and collaborates with the rotating fluid on guide vane; Liquid-inlet pipe outlet caliber from bottom to top reduces in turn, ensures that the biphase gas and liquid flow of incision guide vane possesses identical flow velocity with original rotating fluid on correspondence position guide vane, to realize steady interflow.
Oil outlet pipe is the passage of sump oil effluent gases buoyant tank, from top to bottom run through the central part of silk screen fluid strainer, gasotron and liquid trap successively, in final insertion oil header and with oil header arranged concentric, oil outlet pipe lower port is positioned at bottom oil header, to discharge the whole sump oils collected in oil header in time; Oil outlet pipe top is fixed with end socket by inserting weldering, and middle part realizes location by the strut member of liquid trap, and bottom is positioned by four welding gussets be evenly arranged on oil header.
Rising pipe goes out the passage of air flotation tank as aqueous phase stream after production Water warfare, is positioned at the top of liquid-inlet pipe.And blow-off pipe is positioned at the bottom that tank body receives slag cylinder, its outlet be positioned at liquid-inlet pipe below and with rising pipe 180 ° of reversed arrangement; Due to density variation, the solid particulate that the greasy filth isodensity entrained by biphase gas and liquid flow is larger can fall into the receipts slag cylinder of tank base and discharge via blow-off pipe; Blow-off pipe entrance, by being connected bottom ring flange and screw and receipts slag cylinder, being received between slag cylinder and blow-off pipe flange and is sealed by nitrile rubber pad.Oil outlet pipe and end socket and liquid-inlet pipe, rising pipe and all adopt between vapor pipe with tank wall to insert to weld and realize being connected, liquid-inlet pipe, oil outlet pipe, rising pipe and blow-off pipe all adopt elbow to realize pipeline with biplate flange to be connected.
Three swirler device comprises first step swirler, second stage swirler and third stage swirler, all adopt upper coarse and lower fine back taper cylindrical shell, whole three swirler device is made to present V-arrangement, nickel phosphor plating process is carried out on three swirler device surface, and swirler cones at different levels spacing is vertically equal, namely swirler at different levels has identical height, produces rotating fluid and progressively step-down on the inner conical surface of swirler cone at different levels while being rotated after biphase gas and liquid flow incision swirl cone; Swirler cone junction at different levels adopts arc transition, avoids the change of cross section tapering to cause eddy current, and ensures the swirler conical surface at different levels forms continous-stable rotating fluid; The tapering of swirler cone at different levels increases successively, realize the moment step-down of biphase gas and liquid flow between swirler at different levels, the tapering of the first step, the second stage and third stage swirler cone is designed to 40 °, 50 ° and 60 ° successively, realizes producing the optimal separation effect of water on the swirler conical surface at different levels.Third stage swirler top adopts cylindrical tube, and cylinder internal diameter equals the diameter of the large end of third stage swirler cone, to carry out rectification to the fluid after the separation of three swirler device in time, guarantee sump oil enters oil header smoothly and aqueous phase gets rid of smoothly into Water collecting tube.The upper end of third stage swirler top cylindrical shell is processed with four grooves be along the circumferential direction evenly arranged, and welds the reinforcing member of bar shaped tabular in each groove respectively, realizes the fixing of three swirler device top.
First step swirler cone realizes fixing with receipts slag cylinder upper end by circumferential weld, the diameter of cone small end equals the diameter receiving the large end of slag cylinder inner ring cone surface simultaneously.The inner conical surface of the first step and second stage swirler cone is all furnished with guide vane, guide vane tooth trace is the spiral-line launched along the conical surface, the height of spiral-line equals the height of swirler at different levels, and the helix angle between the evolute of spiral-line and swirler axis is respectively 20 ° and 25 °.Guide vane is rectangle and its height reduces gradually along tooth trace at the normal plane end face perpendicular to tooth trace, and the osculatory of rotating fluid on water conservancy diversion blade face is shortened by long for this reason, ensures rotating fluid progressively step-down on guide vane.First step swirler guide vane end connects with second stage swirler guide vane initiating terminal, and the normal plane end face of junction matches, and ensures guide vane forms one continuous print rotating fluid; The continuous projection of the rectangle tooth form that the swirler conical surface at different levels is formed along spiral-line is blade tooth, the blade tooth number of swirler at different levels reduces successively and blade tooth spacing increases successively, the blade tooth number of first step swirler is 3 ~ 5, the blade tooth number of second stage swirler is 1 ~ 3, and third stage swirler is without guide vane, to ensure that on swirler guide vane at different levels, rotating fluid exists enough pressure reduction and realizes the moment step-down of rotating fluid between guide vane.
Oil header is used for collecting produces the sump oil after Water warfare, and its top adopts cylindrical tube, and bottom adopts tapering to be that the cone of 90 ° is connected with top cylindrical shell.The position of oil header upper port is higher than the upper port of three swirler device, to avoid the relatively large aqueous phase of density to enter in oil header, and affects the treatment effect of oily(waste)water.Oil header top realizes connecting with the reinforcing member of three swirler device by adding fixing bolt.
The gas-liquid two-phase that liquid trap is used in initial gross separation band liquid air-flow and collection are from gasotron and the isolated oil droplet of silk screen fluid strainer, and the taper design of liquid trap cone place cone surface is 130 °, to ensure the separating effect being with liquid air-flow best on the lower conical surface.The large end disc diameter of liquid trap cone is less than the diameter of the large end of the third stage swirler conical surface, small end disc diameter is greater than oil outlet pipe external diameter and is less than oil header internal diameter simultaneously, to ensure to be with the oil droplet of liquid air-flow to collect in rear smooth inflow oil header on " doline " upper conical surface.The large end of liquid trap cone is processed with four grooves be along the circumferential direction evenly arranged, and welds the strut member of bar shaped tabular in each groove respectively, realizes fixing between liquid trap and air flotation tank.
Gasotron is positioned at above liquid trap, and band liquid air-flow constantly changes direction and speed in gasotron, cause mist oil droplet and corrugated board structures surface collision and coalescent, thus guarantee mist oil droplet is separated from air-flow.Gasotron adopts corrugated plate dst structure, and comprise baffle plate, drainage plate, ring-shaped clip and waved plate assembly, waved plate assembly is installed vertically in ring-shaped clip, is entered in oil header after liquid trap collects by the isolated oil droplet of gasotron.Baffle plate and drainage plate all adopt the two-way stainless-steel sheet of back taper of tapering identical with liquid trap, between tank wall and ring-shaped clip, the fixing of gasotron is realized by the mode of circumferential weld, the small end disc diameter of baffle plate cone and drainage plate cone equals the outer ring surface diameter of ring-shaped clip and is less than the large end disc diameter of liquid trap cone, to ensure that silk screen fluid strainer and the isolated oil droplet of gasotron enter in liquid trap smoothly.The baffle plate conical surface is used for changing to be with the direction of liquid air-flow and to make it to import in waved plate assembly, and drainage plate " doline " conical surface ensures that the isolated oil droplet of silk screen fluid strainer flows into liquid trap smoothly through gasotron.The lower end of ring-shaped clip outer ring surface is processed with the loopful groove of a square-section, adopts running fit to realize fixing with baffle plate and drainage plate; Ring-shaped clip top is radially processed with the same diameter circular hole equidistantly arranged, each eyelet is embedded in bearing pin and is used for connecting waved plate assembly.
Each waved plate annularly clip radial direction is equidistantly arranged vertically, and with the bearing pin one_to_one corresponding on it, form the very little and waved plate assembly of flow passage complications of one group of spacing, waved plate spacing is 15 ~ 35mm, take large values during well liquid viscosity height, well liquid viscosity gets the small value time low, and band liquid air-flow is 5 ~ 15kPa by the pressure drop of gasotron.Each waved plate is made up of two-way stainless steel, and its upper design has U-shaped claw, coordinates with bearing pin, and the angle on waved plate between adjacent flap is 120 °, and adjacent flap intersection is designed with and catches oil groove, and down, groove width is that three times of waved plates are wide to notch; Oil groove of catching in adjacent corrugated plate is equidistantly staggered, simultaneously adjacent top vertically arranged superposed of catching oil groove, catches liquid efficiency with what improve waved plate assembly.
Silk screen fluid strainer is positioned at above gasotron, is the fine filtering to band liquid air-flow, and band liquid air-flow traps and the larger oil droplet of coalescent formation on silk screen, enters in oil header after oil droplet collects after gasotron and liquid trap collect.Silk screen fluid strainer comprises snap ring and silk screen cake, and adopt level to install, snap ring adopts doughnut-shaped steel plate, inserts tank body and realizes location by the drainage plate of gasotron.Silk screen cake embeds in snap ring, and the monel wire being 0.30mm by diameter is worked out and folded and forms, and thickness is 150mm, and porosity reaches 99%, and the B alloy wire surface-area of unit volume is 3.5m 2/ m 3, band liquid air-flow is 2kPa by the pressure drop of silk screen fluid strainer.Meanwhile, silk screen cake adopts diameter to be that the igelite silk of 0.10mm is encrypted, and forms the silk screen cake of dual thickness silk with B alloy wire, to improve silk screen filtrate efficiency and to retain the oil droplet of small grain size as far as possible.
The technique effect that the present invention can reach is, hydrocyclone and air supporting two kinds of oily water separation techniques organically combine by this hydrocyclone air-floating apparatus, possess the feature of compact construction, arranges save space for whole try production; Gas-liquid two-phase flows through liquid-inlet pipe and tangentially enters three swirler device formation rotary motion, water gradually upwards and get rid of into Water collecting tube, oil gas is progressively migrated to oil header, and oil droplet and micro bubble constantly contact and adhere to formation adherend, meanwhile, gas-liquid two-phase flows through the progressively step-down of the swirler conical surface at different levels and guide vane and in conjunction with the moment step-down between three swirler device, sump oil to be attached on the microbubble that discharges and to bring in oil header, thus realizes producing the process of water high-efficient purification; By changing swirler at different levels spacing vertically and the maximum oily water treatment amount of adjusting apparatus, make the wide accommodation of device; During backsurging operation, scavenging solution carries out comprehensive flushing through four washpipes to each parts in tank body, possesses parts from washing action; With liquid air-flow through the initial gross separation of liquid trap and gasotron baffle plate, gasotron collision and coalescent and silk screen fluid strainer trapping and coalescent triple separation becomes clean air, possess gas automatic cleaning action, decrease fluid loss simultaneously; Excess pressure in configuration pressure safety valve automatic toilet-cleaning jar, aqueous phase liquid level in liquid level difference transmitter automatic detection water drum is also implemented to report to the police and turn off, level control valve automatic detection oil pipe liquid level control of sewage disposal oil mass, makes the level of automation of complete assembly high; The Water collecting tube of air flotation tank bottom adopts the bitubular and taper configurations to be used for collecting and the aqueous phase be separated containing residual microbubble; Each interface of complete assembly adopts flange to connect, and each parts adopt split type structure, and configuration automation control system, make it be easy to installation, operation and maintenance.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is the typical structure sketch according to proposed by the invention three grades of buck V-arrangement hydrocyclone air-floating apparatus.
Fig. 2 is the structure diagram of air flotation tank in three grades of buck V-arrangement hydrocyclone air-floating apparatus.
Fig. 3 is the structure diagram of first step swirler in three grades of buck V-arrangement hydrocyclone air-floating apparatus.
Fig. 4 is the vertical view of first step swirler in three grades of buck V-arrangement hydrocyclone air-floating apparatus.
Fig. 5 is the structure diagram of the second stage and third stage swirler in three grades of buck V-arrangement hydrocyclone air-floating apparatus.
Fig. 6 is the vertical view of the second stage and third stage swirler in three grades of buck V-arrangement hydrocyclone air-floating apparatus.
Fig. 7 is the structure diagram of gas automatically cleaning device in three grades of buck V-arrangement hydrocyclone air-floating apparatus.
Fig. 8 is the general flow chart that three grades of buck V-arrangement hydrocyclone air-floating apparatus purifying treatment produce water.
Fig. 9 is the backsurging operation general flow chart of three grades of buck V-arrangement hydrocyclone air-floating apparatus.
1-air flotation tank in figure, 2-silk screen fluid strainer, 3-gasotron, 4-liquid trap, 5-oil header, 6-third stage swirler, 7-oil outlet pipe, 8-second stage swirler, 9-first step swirler, 10-rising pipe, 11-liquid-inlet pipe, 12-blow-off pipe, 13-washpipe, 14-vapor pipe, 15-pressure security valve union, 16-end socket, 17-studs, 18-tank body, 19-Liquid level valve union, 20-Water collecting tube, 21-receives slag cylinder, 22-liquid level difference transmitter joint, 23-first step swirler cone, 24-first step swirler guide vane, 25-reinforcing member, 26-swirler cylindrical shell, 27-third stage swirler cone, 28-second stage swirler cone, 29-second stage swirler guide vane, 30-snap ring, 31-silk screen cake, 32-drainage plate, 33-ring-shaped clip, 34-waved plate assembly, 35-baffle plate, 36-strut member, 37-liquid trap cone.Embodiment
In FIG, three grades of buck V-arrangement hydrocyclone air-floating apparatus are made up of air flotation tank 1, silk screen fluid strainer 2, gasotron 3, liquid trap 4, first step swirler 9, second stage swirler 8, third stage swirler 6, oil header 5, oil outlet pipe 7, rising pipe 10, liquid-inlet pipe 11 and blow-off pipe 12.During assembling, first first step swirler 9, second stage swirler 8 and third stage swirler 6 are received on air flotation tank 1 tank body successively, guarantee that liquid-inlet pipe 11 exports the cone eddy flow section tangentially entering first step swirler 9, then oil header 5 is received on the reinforcing member of three swirler device, then liquid trap 4, gasotron 3 and silk screen fluid strainer 2 are loaded in air flotation tank 1 tank body successively, guarantee each parts centering, and the end socket of air flotation tank 1 and tank body are linked together, the tensile force of each studs is identical, finally loads onto oil outlet pipe 7, rising pipe 10 and blow-off pipe 12.During purging, close the valve on oil outlet pipe 7, rising pipe 10, liquid-inlet pipe 11 and blow-off pipe 12, then by the vapor pipe on air flotation tank 1 end socket to hydrocyclone air-floating apparatus and pipeline nitrogen injection thereof, and the oxygen level of nitrogen is discharged by blow-off valve monitoring, after oxygen level reaches limit value, close gas discharge outlet and exhaust valve successively.
In FIG, during three grades of buck V-arrangement hydrocyclone air-floating apparatus debugging, first carry out hydro-test to whole device, test pressure is 1.25 times of design pressure; Then, check whether external interface is connected correctly with equipment interface, and whether intact each circuit connects, and whether joint loosens, and whether ground terminal connects successively; Whether then, in inspection units, whether pipeline system joint has leakage, unimpeded, and whether the switch of each pipeline valve is correct; Finally, connect instrument air, whether inspection apparatus table gas source inlet pressure is between 500 ~ 800kPa, and whether source of the gas is clean, dry.When safeguarding, every year each parts are once overhauled, check whether liquid-inlet pipe 11 exit has foreign matter to pile up successively, whether first step swirler 9, second stage swirler 8 and third stage swirler 6 cone have corrosion, whether the guide vane surface on three swirler device has corrosion, when wall thickness is close to 1mm, need to change; Check the dirt on three swirler device, oil header 5, liquid trap 4, gasotron 3 and silk screen fluid strainer 2, when thickness is greater than 3mm, need to carry out backsurging operation, the dirts such as obstinate greasy dirt can clean with alkali cleaning or with scavenging solutions such as detergents, and the dirt such as incrustation scale and anvil cinder, the scavenging solution cleanings such as available hydrochloric acid.
In FIG, flow velocity and the flow of producing water and the rear sump oil of purification thereof can realize respectively by the variable valve regulated on liquid-inlet pipe 11 and oil outlet pipe 7.Produce water maximum throughput to be realized by the spacing of adjustment first step swirler 9, second stage swirler 8 and third stage swirler 6 axis.When production water treatment amount and inlet pressure certain, by adjusting the variable valve on oil pipe 7, control suitable differential pressure ratio, to ensure to produce the oil removal rate of water.
In fig. 2, the end socket 16 of air flotation tank 1 is connected with tank body 18 ring flange by studs 17, scavenging solution enters in air flotation tank 1 through washpipe 13 and implements backsurging operation, receives slag cylinder 21 and is used for collecting the solid particulates such as the isolated greasy filth of three swirler device institute and being sent in blow-off pipe 12.The vapor pipe 14 going out air flotation tank 1 at gas stream is provided with tensimeter, Real-Time Monitoring gas outlet pressure; The pressure security valve union 15 of end socket 16 is provided with pressure safety valve ensure superpressure dangerous working condition time automatic relief pressure, to protect air flotation tank 1; The liquid level difference transmitter joint 22 of tank body 18 is provided with liquid level difference transmitter, the liquid level difference of aqueous phase in automatic detection water drum 20, implements high liquid level and low liquid level warning and high liquid level and low liquid level and turn off operation; The Liquid level valve union 19 of tank body 18 is provided with level control valve, and the liquid level of automatic detection oil pipe 5 also controls the blowdown oil mass of oil outlet pipe 7; The rising pipe 10 producing aqueous phase stream after Water warfare and go out air flotation tank 1 is provided with tensimeter, Real-Time Monitoring aqueous phase top hole pressure; The oil outlet pipe 7 of sump oil effluent gases buoyant tank 1 is provided with tensimeter, Real-Time Monitoring sump oil top hole pressure, and on liquid-inlet pipe 11 and oil outlet pipe 7, differential manometer is installed, the pressure difference between the real time measure feed liquor pipeline and delivery pipeline.
In figs. 3 and 4, first step swirler guide vane 24 launches along the conical surface of first step swirler cone 23, and first step swirler cone 23 is fixed by the mode of circumferential weld with receipts slag cylinder 21 upper end.Liquid-inlet pipe 11 exports concordant with the blade face of correspondence position first step swirler guide vane 24, ensures that biphase gas and liquid flow is cut guide vane smoothly and collaborates with the rotating fluid on guide vane.The liquid-inlet pipe 11 that biphase gas and liquid flow enters air flotation tank 1 is provided with thermometer and tensimeter, the temperature and pressure of Real-Time Monitoring biphase gas and liquid flow.
In fig. 5 and fig., second stage swirler guide vane 29 launches along the conical surface of second stage swirler cone 28, and first step swirler guide vane 24 end connects with second stage swirler guide vane 29 initiating terminal.The tapering of third stage swirler cone 27 is maximum in three swirler device, be designed to 60 °, the swirler cylindrical shell 26 on its top, for the rectification after rotating fluid separation, realizes the fixing of three swirler device top by the reinforcing member 25 welded in swirler cylindrical shell 26 upper recess.
In the figure 7, gas automatically cleaning device is made up of liquid trap 4, gasotron 3 and silk screen fluid strainer 2, liquid trap 4 is used for initial gross separation band liquid air-flow collect gasotron 3 and the isolated oil droplet of silk screen fluid strainer 2, is welded with strut member 36 fixing with what realize between liquid trap 4 and air flotation tank 1 in the groove of liquid trap cone 37 end greatly; Mist oil droplet is separated by gasotron 3 from air-flow, it is fixing that ring-shaped clip 33 and baffle plate 35 and drainage plate 32 adopt running fit to realize, waved plate assembly 34 is arranged vertically within ring-shaped clip 33 by bearing pin, each waved plate of waved plate assembly 34 has the trapping agglutinating power of catching oil groove enhancing gasotron 3; Silk screen fluid strainer 2 carries out fine filtering to band liquid air-flow, and silk screen cake 31 adopts level to install, while snap ring 30 realize between silk screen fluid strainer 2 and air flotation tank 1 by drainage plate 32 location.
In fig. 8, when purifying treatment produces water, flow through each outlet of liquid-inlet pipe 11 containing micro bubble with the gas-liquid two-phase producing water and tangentially spray into the cone eddy flow section entering first step swirler 9, then in the cone and guide vane of three swirler device, form rotary motion and produce rotating fluid, at the large water of centrifuge field Midst density gradually upwards and get rid of in the Water collecting tube 20 of air inlet buoyant tank 1, and the less oil droplet and micro bubble etc. of density is progressively migrated to oil header 5 and is formed wick, due to oil droplet and micro bubble density variation, micro bubble migration velocity and ascent rate very fast, thus add the two touch opportunity, and by constantly contact and adhesion form oil droplet and micro bubble adherend, meanwhile, gas-liquid two-phase flow through the swirler conical surface at different levels and guide vane progressively step-down and in conjunction with the moment step-down between three swirler device, can constantly discharge microbubble intensive in a large number, in oil droplet and micro bubble adherend uphill process, oil droplet and microbubble fully mixes, sump oil containing oil droplet and suspended substance is attached on microbubble and brings in oil header 5, thus reach desirable deoiling effect, sump oil after separation is discharged through oil outlet pipe 7, water is discharged through rising pipe 10, and the larger solid particulate of greasy filth isodensity can fall into the receipts slag cylinder 21 bottom tank body 18 and discharge via blow-off pipe 12.Band liquid air-flow after separation is the flow direction of gas-liquid and velocity of flow flip-flop after liquid trap 4 and gasotron 3 baffle plate 35 respectively, gas-liquid is made to carry out initial gross separation, isolated fluid falls in liquid trap 4, and the band liquid air-flow after initial gross separation enters the very little and gasotron 3 waved plate assembly 34 of flow passage complications of one group of spacing, air-flow is forced to stream, in the runner that circulation area is little, oil droplet speed is improved with air-flow, and obtain the energy producing mass force, the change of air flow line and the inertia of oil droplet make oil droplet and waved plate surface collision and the larger oil droplet of coalescent formation, be settled down in liquid trap 4 by action of gravity, continue upwards flow and enter silk screen fluid strainer 2 from gasotron 3 band liquid air-flow out, the pedesis of the interception of oil droplet inertial impaction, silk screen and small grain size oil droplet is leaned in the silk screen cake 31 of dual thickness silk, trap on silk screen with liquid air-flow and the larger oil droplet of coalescent formation, enter in liquid trap 4 by action of gravity through gasotron 3 after oil droplet collects, enter in oil header 5 after the isolated fluid of gas automatically cleaning device collects by liquid trap 4, clean air is discharged air flotation tank 1 from vapor pipe 14 and is reclaimed rear recycling.
In fig .9, during backsurging operation, scavenging solution four washpipes 13 on end socket 16 spray in air flotation tank 1 simultaneously, successively to snap ring 30 and the silk screen cake 31 of silk screen fluid strainer 2 in tank body 18, the strut member 36 of the drainage plate 32 of gasotron 3, ring-shaped clip 33 and waved plate assembly 34, liquid trap 4 and liquid trap cone 37 and oil header 5 carry out comprehensive cleaning; Simultaneously scavenging solution successively enters in three swirler device and Water collecting tube 20 through oil header 5, carries out comprehensive cleaning to the double barrel wall in the cone of third stage swirler 6, second stage swirler 8 and first step swirler 9 and guide vane and Water collecting tube 20 and liquid-inlet pipe 11 tank skin; Scavenging solution warp containing dirt after cleaning is discharged to outside air flotation tank 1 respectively by oil outlet pipe 7, rising pipe 10 and blow-off pipe 12.

Claims (10)

1. one kind three grades buck V-arrangement hydrocyclone air-floating apparatus, biphase gas and liquid flow tangentially enters three swirler device and forms rotary motion, water gradually upwards and get rid of into Water collecting tube, oil gas is progressively migrated to oil header formation wick, and by constantly contact and adhesion form oil droplet and micro bubble adherend, simultaneously through the swirler conical surface at different levels and guide vane progressively step-down and in conjunction with the moment step-down between three swirler device, microbubble intensive in a large number is constantly discharged in biphase gas and liquid flow, sump oil to be attached on microbubble and to bring in oil header, reach desirable deoiling effect, band liquid air-flow after separation is through liquid trap, gasotron becomes clean air with triple separation of silk screen fluid strainer, it is characterized in that:
One air flotation tank; Described air flotation tank top adopts circular plate type end socket, and end socket surrounding is along the circumferential direction evenly arranged four washpipes; Tank body lower part employing tapering is the divergent-cone wall of 50 °, and adopts saddle type to seal body bottom it, and whole air flotation tank presents the structure of V-arrangement class sub warhead; Form the Water collecting tube of Dual-barrel-shaped between tank body middle and lower part and three swirler device, be used for collecting and produce the aqueous phase after Water warfare; Central part bottom envelope body is welded with cylindricality and receives slag cylinder, receives the back taper that slag cylinder inner ring surface top employing tapering is 40 °;
One liquid-inlet pipe; Described liquid-inlet pipe is positioned at the tank base of air flotation tank, be divided into two pipelines of the 180 ° of reversed arrangement in left and right, each liquid-inlet pipe runs through the saddle type envelope body of tank body respectively and its outlet tangentially enters the cone eddy flow section of first step swirler, and liquid-inlet pipe outlet is along tank body is axially evenly distributed successively and each outlet is concordant with the blade face of correspondence position guide vane;
One oil outlet pipe, rising pipe and blow-off pipe; Described oil outlet pipe is the passage of sump oil effluent gases buoyant tank, to insert in oil header and with oil header arranged concentric; Described rising pipe is the passage that aqueous phase stream goes out air flotation tank, is positioned at the top of liquid-inlet pipe; Described blow-off pipe is positioned at the bottom that tank body receives slag cylinder, its outlet be positioned at liquid-inlet pipe below and with rising pipe 180 ° of reversed arrangement;
One three swirler device; Described three swirler device all adopts upper coarse and lower fine back taper cylindrical shell, and whole three swirler device presents V-arrangement, and swirler at different levels has identical height, and the tapering of swirler cone at different levels increases successively; The inner conical surface of the first step and second stage swirler cone is all furnished with guide vane, and guide vane tooth trace is the spiral-line launched along the conical surface, and the helix angle between the evolute of spiral-line and swirler axis is respectively 20 ° and 25 °; The continuous projection of the rectangle tooth form that the swirler conical surface at different levels is formed along spiral-line is blade tooth, and the blade tooth number of swirler at different levels reduces successively and blade tooth spacing increases successively;
One oil header; Described oil header is used for collecting produces the sump oil after Water warfare, and its top adopts cylindrical tube, and bottom adopts tapering to be the cone of 90 °, and the position of oil header upper port is higher than the upper port of three swirler device;
One liquid trap; The taper design of described liquid trap cone place cone surface is 130 °, and the large end disc diameter of liquid trap cone is less than the diameter of the large end of the third stage swirler conical surface, and small end disc diameter is greater than oil outlet pipe external diameter and is less than oil header internal diameter simultaneously;
One gasotron; Described gasotron adopts corrugated plate dst structure, and waved plate assembly is installed vertically in ring-shaped clip, and baffle plate and drainage plate all adopt the two-way stainless-steel sheet of back taper of tapering identical with liquid trap; Each waved plate annularly clip radial direction is equidistantly arranged vertically, and with the bearing pin one_to_one corresponding on it, form the very little and waved plate assembly of flow passage complications of one group of spacing; On waved plate, adjacent flap intersection is designed with and catches oil groove, and down, groove width is that three times of waved plates are wide to notch;
One silk screen fluid strainer; Described silk screen fluid strainer is positioned at above gasotron, employing level is installed, silk screen cake embeds in snap ring, the monel wire being 0.30mm by diameter is worked out and is folded and forms, adopt diameter to be that the igelite silk of 0.10mm is encrypted simultaneously, form the silk screen cake of dual thickness silk with B alloy wire.
2. three grades of buck V-arrangement hydrocyclone air-floating apparatus according to claim 1, it is characterized in that: the end socket washpipe place of described air flotation tank is circumferentially furnished with pressure security valve union, and connect with pressure safety valve with ring flange, when air flotation tank internal pressure exceedes limit value and occurs dangerous working condition, pressure safety valve is by the automatic relief pressure of mechanical effect;
The tank wall on described oil header upper end and rising pipe top is provided with upper and lower two liquid level difference transmitter joints, liquid level difference transmitter detects the liquid level difference of aqueous phase in tank body Water collecting tube automatically, and change the highest liquid level and minimum liquid level signal into electric signal, implement high liquid level and low liquid level warning and high liquid level and low liquid level and turn off operation;
The tank wall of described oil header upper end is designed with Liquid level valve union, is arranged symmetrically with upper liquid level difference transmitter joint 180 °, the liquid level of the level control valve automatic detection oil pipe that it is installed also controls the blowdown oil mass of oil outlet pipe.
3. three grades of buck V-arrangement hydrocyclone air-floating apparatus according to claim 1, it is characterized in that: described liquid-inlet pipe outlet caliber from bottom to top reduces in turn, ensures that the biphase gas and liquid flow of incision guide vane possesses identical flow velocity with original rotating fluid on correspondence position guide vane.
4. three grades of buck V-arrangement hydrocyclone air-floating apparatus according to claim 1, is characterized in that: the tapering of the first step of described three swirler device, the second stage and third stage swirler cone is designed to 40 °, 50 ° and 60 ° successively;
Described first step swirler cone realizes fixing with receipts slag cylinder upper end by circumferential weld, the diameter of cone small end equals the diameter receiving the large end of slag cylinder inner ring cone surface simultaneously;
Described third stage swirler top adopts cylindrical tube, and the upper end of cylindrical shell is processed with four grooves be along the circumferential direction evenly arranged, and welds the reinforcing member of bar shaped tabular in each groove respectively, realizes the fixing of three swirler device top.
5. three grades of buck V-arrangement hydrocyclone air-floating apparatus according to claim 1, is characterized in that: the height of the guide vane spiral-line of described three swirler device equals the height of swirler at different levels;
Described guide vane is rectangle and its height reduces gradually along tooth trace at the normal plane end face perpendicular to tooth trace, and the osculatory of rotating fluid on water conservancy diversion blade face is shortened by long for this reason.
6. three grades of buck V-arrangement hydrocyclone air-floating apparatus according to claim 4 or 5, is characterized in that: described first step swirler guide vane end connects with second stage swirler guide vane initiating terminal, and the normal plane end face of junction matches;
The blade tooth number of described first step swirler is 3 ~ 5, and the blade tooth number of second stage swirler is 1 ~ 3, and third stage swirler is without guide vane.
7. three grades of buck V-arrangement hydrocyclone air-floating apparatus according to claim 1, it is characterized in that: described oil outlet pipe top is fixed with end socket by inserting weldering, middle part realizes location by the strut member of liquid trap, and bottom is positioned by four welding gussets be evenly arranged on oil header;
Described oil header top realizes connecting with the reinforcing member of three swirler device by adding fixing bolt;
The large end of described liquid trap cone is processed with four grooves be along the circumferential direction evenly arranged, and welds the strut member of bar shaped tabular in each groove respectively, realizes fixing between liquid trap and air flotation tank.
8. three grades of buck V-arrangement hydrocyclone air-floating apparatus according to claim 1, it is characterized in that: the baffle plate of described gasotron and drainage plate are between tank wall and ring-shaped clip, and the small end disc diameter of baffle plate cone and drainage plate cone equals the outer ring surface diameter of ring-shaped clip and is less than the large end disc diameter of liquid trap cone;
The lower end of the ring-shaped clip outer ring surface of described gasotron is processed with the loopful groove of a square-section, adopts running fit to realize fixing with baffle plate and drainage plate; Ring-shaped clip top is radially processed with the same diameter circular hole equidistantly arranged, each eyelet is embedded in bearing pin and is used for connecting waved plate assembly.
9. three grades of buck V-arrangement hydrocyclone air-floating apparatus according to claim 1, is characterized in that: the waved plate spacing of described gasotron is 15 ~ 35mm, and band liquid air-flow is 5 ~ 15kPa by the pressure drop of gasotron;
Described waved plate is made up of two-way stainless steel, and its upper design has U-shaped claw, coordinates with bearing pin, and the angle on waved plate between adjacent flap is 120 °; Oil groove of catching in adjacent corrugated plate is equidistantly staggered, simultaneously adjacent top vertically arranged superposed of catching oil groove.
10. three grades of buck V-arrangement hydrocyclone air-floating apparatus according to claim 1, is characterized in that: the snap ring of described silk screen fluid strainer adopts doughnut-shaped steel plate, insert tank body and realize location by the drainage plate of gasotron;
The silk screen cake thickness of described silk screen fluid strainer is 150mm, and porosity reaches 99%, and the B alloy wire surface-area of unit volume is 3.5m 2/ m 3, band liquid air-flow is 2kPa by the pressure drop of silk screen fluid strainer.
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CN108751630A (en) * 2018-05-17 2018-11-06 深圳科力迩科技有限公司 Greasy filth cleaning method
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CN111375245A (en) * 2018-12-31 2020-07-07 中国石油化工股份有限公司 Pipe assembly for connecting gas-liquid cyclone separator and downstream gas phase pipeline

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