CN104763998A - Two-stage afterheat recovering type split steam generating device - Google Patents
Two-stage afterheat recovering type split steam generating device Download PDFInfo
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- CN104763998A CN104763998A CN201510105457.3A CN201510105457A CN104763998A CN 104763998 A CN104763998 A CN 104763998A CN 201510105457 A CN201510105457 A CN 201510105457A CN 104763998 A CN104763998 A CN 104763998A
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Abstract
The invention provides a steam generating device. The steam generating device is that a split steam generator and an afterheat recovering device are integrally structured, so that the device is compact, easy to be maintained and small in smoke backpressure; an oil-gas double combustion device meets an oil-gas two-purpose mode according to an independent nozzle; short flame can be generated and uniformly distributed; a steam generating folding pipe is a layering disc type snake-shaped folding pipe which achieves efficient heat exchange under horizontal baffling and vertical reversing, so that the steam can be rapidly generated; in addition, the folding pipe has the excessive freshwater protection performance and can ensure reliable cooling and prevent the heating surface from salt deposit the folding pipe can be an inner threaded steel pipe to avoid film boiling of the freshwater; meanwhile, the a medium folding pipe is a double-layer pipe which avoids corrosion; a steam generation control system can automatically control the flow rate of mediums in the folding pipe and the oil-gas double combustion device and can protect the folding pipe from excessive temperature and excessive pressure; a first-stage cooler can achieve forced circulating liquid cooling of a combustion body and be matched with a second-stage heat medium device to achieve two-stage afterheat recovery; after spraying and purging, the smoke and ash can be regularly automatically cleaned.
Description
Technical field
The present invention relates to the steam raising plant of a kind of Offshore Engineering field viscous crude platform, particularly the split type steam raising plant of waste heat two-stage reclaiming type that matches of a kind of offshore oilfield thermal recovery steam injection technology and control system thereof.
Background technology
Current, it is considerable that offshore oilfield has verified heavy oil reserves, but viscous crude is because its heavy components content is high, viscosity large, poor fluidity, exploitation difficulty is very big, the study and use of offshore platform thick oil heat production steam injection technology is at the early-stage, a lot of aspect is also immature or be in the sea trial stage, and this all becomes the key factor of restriction Offshore Heavy Oil Field economical and effective exploitation.Therefore, be necessary very much to carry out the key technology research such as the relevant steam raising plant of Offshore Heavy Oil Field thermal recovery engineering.
At present, there is the product of being correlated with in the oil field steam injection generating means matched for land viscous crude field thermal recovery technology, and in Xinjiang, the Liaohe River, the oil field such as triumph carried out Pulse calibrater, but due to land viscous crude field thermal recovery steam injection generating means have that volume is too huge, heavier-weight and the feature such as supporting flow process is more complicated, and offshore oilfield platform is by the restriction of space cost, make it cannot directly transplanting and application.Make a general survey of the thermal recovery situation of domestic and international offshore oilfield, consider economic benefit and the income of exploitation, offshore viscous oil field does not all have the mature technology system of large-scale development, be applicable to offshore viscous oil field steam for thermal recovery generating means at present and be still in the experimental test stage, the domestic matured product nowadays also not having applicable scale steam for thermal recovery generating means, needs system to carry out correlative study to adapt to the needs of scale thermal recovery in the future and the many mouthfuls of same notes of wells.In addition, carry out the research of steam generation technique, except meeting the demand of scale thermal recovery, also to be improved, to meet the demand of offshore platform to heavy crude heat extraction compact high efficient development device in high-efficiency compact, the switching of oil-gas two-way pattern, the cooling of short flame, body of heater, steam pipe salification and burn into waste heat recovery etc.
Summary of the invention
In order to overcome defect and the deficiency of existing land viscous crude field thermal recovery steam injection generating means existence, the object of this invention is to provide compact steam generating means during a kind of applicable offshore platform thick oil heat production steam injection.The vertical special construction that this steam raising plant foundation oil gas individual injection mouth, disc type internal thread broken pipe, Split type combustion room and steam generator are integrated with waste-heat recoverer; possesses device compact; flue gas back pressure is little; oil-gas two-way pattern; the flame produced is short; horizontal baffling adds vertical adverse current high efficient heat exchanging; the excessive fresh water protection of broken pipe; without salification and film boiling phenomenon in broken pipe; the liquid cooling of burning body forced circulation but; waste heat two-stage reclaims, cigarette ash self-cleaning, and steam generation speed is fast and safe and reliable and be convenient to the features such as maintenance.
The technical solution adopted for the present invention to solve the technical problems is the split type steam raising plant of waste heat two-stage reclaiming type on a kind of Offshore Heavy Oil Field platform of exploitation, adopt standing form, to reduce flue gas back pressure, ensure characteristics of compact layout and realize steam generator integrated with waste-heat recoverer, it is primarily of a few part composition such as the two burner of oil gas, steam generation broken pipe, burning body, one-level cooler, secondary thermal medium device, expansion joint, waste-heat recoverer, spray thrower and steam generation control system.
The two burner of oil gas is used for as whole steam generation flow process provides sufficient thermal source, be different from the burner that onshore oil field steam injection apparatus produces long flame, what the two burner of this oil gas produced be short flame and flame distribution is even, the flame simultaneously formed can regulate voluntarily according to fuel pressure or flow, to improve the conversion ratio between fuel chemical energy and heat energy, and ensure the two heat transfer efficiency between burner and broken pipe of oil gas.The two burner of oil gas adopts fuel oil, combustion gas and air independently jet blower separately, oil-gas two-way double fuel, and fuel oil can be crude oil, mink cell focus or diesel oil on platform, combustion gas be platform self-produced take methane as the associated gas of main component; Combustion mode can be combustion gas pattern, also can be fuel oil pattern, and when the tolerance or air pressure that supply combustion gas are not enough, combustion gas pattern automatically switches to fuel oil pattern, carries out supercharging during fuel delivery by gear pump or screw pump.
The two burner of oil gas adopts standing form, it is arranged in burning body bottom, its center line coincides with the center line of burning body, it comprises two combustion body, two combustion head, two combustion dish, air supply, fuel gas supply device and fuel delivery device, the wherein material selection austenitic steel 1Cr18Ni9Ti of two combustion body and two combustion head, the material of remaining part adopts two-way stainless steel.Each parts are integrated in one by two combustion dish by the two burner of oil gas, wherein the lower end of two combustion dish is by inner and outer layered arrangement successively 1 air injector, 6 gas injection nozzles and 6 fueling injection nozzles, and the upper end of two combustion dish is by inner and outer two combustion head and the two combustion body arranged respectively, and forming fuel oil room from bottom to top, fuel chamber and three, diffusion room annular compartment thus, the axial spacing of three ring cavities increases successively.
Fuel oil room is cylindricality ring cavity, and atomized fuel makes greatly its volume suddenly expand because cross section becomes suddenly and flows drops after injecting; Fuel chamber and diffusion room are all in upper coarse and lower fine back taper ring cavity, and wherein the jet angle of fuel chamber's oil gas is 15 ° ~ 25 °, oil gas flow velocity is reduced gradually and flow pressure and constantly increase after atomized fuel or combustion gas spray into because airway cross-section constantly increases; And the jet angle of diffusion room flame is 90 ° ~ 110 °, oil gas sprays into rear rapid spatial expansion and mixes with pressure-air, after automatic ignitor igniting, Thorough combustion forms flame, in the process that flame upwards flows, because cross section of fluid channel increases fast, its flow velocity is reduced rapidly, finally spray into burning body with short flamed form by the two burner of oil gas, and heat the steam generation broken pipe above it.
Fuel delivery device is used to provide high-pressure atomization fuel oil, it comprises fuel oil supervisor, fuel oil arm and fueling injection nozzle, high pressure fuel is through fuel oil supervisor and by after point oily route assignment, enter fuel oil arm and inject fuel oil room through fueling injection nozzle atomized fuel after producing fine grained oil droplet again, six fueling injection nozzles are along the circumferential direction evenly arranged, and coil outermost eyelet interference fit with two combustion, and and adopt linear contact lay between the ring wall of both sides, fuel oil room.Fuel gas supply device is used to provide high-pressure gas, it comprises combustion gas supervisor, combustion gas arm and gas injection nozzle, high-pressure gas is through combustion gas supervisor and by after point gas route assignment, enter combustion gas arm and inject fuel oil room and fuel chamber at a high speed through gas injection nozzle again, six gas injection nozzles are along the circumferential direction evenly arranged, and with two combustion dish in the middle part of eyelet interference fit.Air supply is used to provide pressure-air, it comprises air pipe line and air injector, pressure-air flows into air injector through air pipe line and sprays into diffusion room, the eyelet interference fit of air injector and Shuan Ran disk center, and be on same vertical plane with the axis of each fueling injection nozzle and gas injection nozzle.In addition, fuel gas supply device and air supply complete the post-job purging operation of spray simultaneously, realize the regular self-cleaning operation of cigarette ash, pressure-air flows through fuel gas pipeline with air pipe line simultaneously and to spray together with air injector from gas injection nozzle, and then purge oil gas two burner, steam generation broken pipe and secondary thermal medium devices etc., thoroughly to remove the foreign material such as cigarette ash.
Two combustion head is fixed on the center of two combustion dish by circumferential weld, the structure that it adopts cylinder to combine with cone, and the tapering of its outer ring surface cone from bottom to top increases successively, and the inside of two combustion head arranges air injector and gas injection nozzle from inside to outside respectively.Air injector adopts multiple-limb line configurations, the caliber that each air props up jet blower is identical, the cone line of its axis and outer ring surface upper cone is perpendicular, and its outlet is positioned at the bottom of diffusion room, and the sectional area of air main jet nozzle equals each jet blower sectional area sum in addition.Gas injection nozzle adopts layered structure, the axis being parallel of upper and lower two-layer jet blower and and all in 30 ° between horizontal plane, upper strata jet blower caliber is greater than lower floor's jet blower caliber simultaneously, upper strata jet blower outlet is positioned at the middle part of fuel chamber, lower floor's jet blower outlet is then positioned at the bottom of fuel oil room and just to fueling injection nozzle, prevents the cigarette ash in combustion gas pattern from deposition occurring and blocks fueling injection nozzle.Two combustion body is connected with two combustion dish by the ring flange of lower end, the thin wall cylinder structure that it adopts cylinder to combine with the conical surface, its inwall coordinates with two outer ring surface fire head three annular compartments forming oil gas pair burner, and the top of two combustion body cone is mutually concordant with the top of pair to fire head.
Burning body design is vertical vessel form; it adopts split type double barrel configurations; one-level cooler is covered with between the bitubular; its material selection pressure vessel material Q345R; barrel entire body liner bidirectional stainless steel, burning body comprises inside and outside undertaking body, inside and outside cylindrical shell, interior covering body, a few part of protection tracheae, ash releasing tube and pressure safety valve.The end of inside and outside undertaking body, inside and outside cylindrical shell and interior covering body all arranges ring flange, and is connected by studs, and dismounting is carried out in each split being convenient to burning body; Each split end face is all processed with the loopful groove that cross section is rectangle, in groove, placement metallic gasket realizes the sealing between each split simultaneously.
Inside and outside undertaking body is positioned at the topmost of burning body, and its top realizes the connection between burning body and expansion joint by ring flange; Interior undertaking body adopts with the main body of outer undertaking body the conic tube that tapering is identical; its underpart is evenly arranged four protection tracheaes along taper seat; protection tracheae and carbon dioxide canister are connected; during the dangerous working conditions such as broken pipe is overheated, leakage, automatic carbon dioxide gas also enters burning body via protection tracheae.Pressure safety valve is arranged in circumferentially same with protection tracheae, when exceeding limit value operating mode for broken pipe leakage equal pressure, and the release pressure by mechanism automatic deflation.
Inner barrel and outer cylinder body are positioned at the middle part of burning body, and all adopt column-shaped barrel, comprise top cylinder, middle cylinder and doffing three part, in it, cloth is set up broken pipe, middle broken pipe and lower broken pipe respectively, and the top of three is all furnished with spray arm simultaneously.Interior covering body is positioned at the bottom of burning body, and interior envelope body adopts cylinder cylindrical shell, and covering body adopts ellipsoidal head; Be processed with circular eyelet in the middle part of covering body, eyelet and two combustion dish interference fit realize the two burner of oil gas in the location on body of burning; The outer rim of covering body opening eye is provided with ash releasing tube, and during self-cleaning operation, the foreign material such as cigarette ash come together in burning body bottom portion with cleaning fluid and discharge via ash releasing tube.
The material selection austenitic steel 1Cr18Ni9Ti of steam generation broken pipe, it comprises feed pipe, upper broken pipe, middle broken pipe, lower broken pipe, monitoring pipe and supplies steam pipe, each pipe adopts the single steel pipe of same model, be designed to layering UNICOM structure each other, feed pipe porch arranges booster pump simultaneously, ensures the high-pressure fluid flow at high speed from top to bottom in broken pipe.Steam generation broken pipe adopts split type UNICOM broken pipe, realizes the high efficient heat exchanging that horizontal baffling adds vertical adverse current, with this instantaneously producing steam, and is convenient to safeguard.All there is excessive fresh water in upper broken pipe and all heating surfaces of middle broken pipe, and in lower broken pipe, steam quality is all the time lower than 80%, and fully can ensure that broken pipe reliably cools can not salt scale coagulation with heating surface.In addition, steam generation broken pipe lack of water operating mode, implements to turn off and moisturizing duplicate protection automatically.
Upper broken pipe, middle broken pipe and lower broken pipe all adopt vertical layered to arrange, to reduce flue gas back pressure and to ensure that fresh water in broken pipe can emptying; Every layer of broken pipe entirety is in disc-shape, and outmost turns arranges the steel pipe of whole circle, equidistant serpentine arrangement broken pipe in circle, thus can the thermal expansion amount of reasonable compensation broken pipe, and makes baffling can make full use of the flue gas heat of this layer of position.Simultaneously, the broken pipe interlaced arrangement of upper broken pipe, middle broken pipe and each interlayer of lower broken pipe, and increase successively to each interlamellar spacing of lower broken pipe again from upper broken pipe to middle broken pipe, be respectively a diameter of steel tube and two diameter of steel tube, so that baffling can utilize different layers position flue gas heat to greatest extent.In addition, upper broken pipe and lower broken pipe and middle broken pipe each other vertically horizontal cross put, to improve the rate of heat exchange between broken pipe and flue gas.The steel pipe successively concentric layout of upper broken pipe, middle broken pipe and lower broken pipe outmost turns, whole steam generation broken pipe is made to be column-shaped barrel structure, to ensure that flue gas directly enters waste-heat recoverer after flowing through each layer broken pipe, and can not Release and dispersion to steam generation broken pipe and burning body between annular space.
Upper broken pipe, middle broken pipe and lower broken pipe all adopt inner thread steel pipe, and pitch is 1/4th of broken pipe external diameter, so that the problem of film boiling occurs fresh water in broken pipe under effectively solving high pressure conditions.It is to be noted, middle broken pipe adopts two-layer pipe, its outer tube adopts and the steel pipe of steam generation broken pipe same model with material, and inner tube then adopts the sheet steel pipe of bidirectional stainless steel material, so that the problem of corroding easily occurs in broken pipe body layer position in effectively solving.
Feed pipe is positioned at the top of top cylinder, is used for water at low temperature to be delivered to upper broken pipe, and is connected with upper broken pipe by nut.Monitoring pipe realizes upper broken pipe and middle broken pipe and connecting between middle broken pipe and lower broken pipe by nut and ring flange, it is designed with temperature sensor and control valve, the temperature of light water and steam in automatic monitoring broken pipe, during lack of water operating mode, implements to turn off operation and supplements water at low temperature in time.Be positioned at the bottom of doffing for steam pipe, be used for exporting high-temperature steam, and be connected by nut and lower broken pipe.
Fluidized―bed furnace situation in steam generation broken pipe is, transporting low temperature water in feed pipe, the hot water that upper folding Bottomhole pressure heats through low-temperature flue gas, hot water after the heating of top monitoring Bottomhole pressure, middle folding Bottomhole pressure continues the vehicle repair major fluid of heating through flue gas, vehicle repair major fluid is transported to lower broken pipe, the steam that lower folding Bottomhole pressure heats through high-temperature flue gas by bottom monitoring pipe, finally exports high-temperature steam for steam pipe.
Steam generation control system is used for controlling the flow of light water and steam in broken pipe and realizes broken pipe overtemperature and overpressure protection; the feed pipe suction line of steam generation broken pipe arranges emergency shutdown valve; broken pipe arranges double-thermocouple; the upper set temperature sensor of monitoring pipe and control valve, arrange Pressure Relief Valve on steam pipe outlet line simultaneously.During nominal situation, the temperature variations of light water and steam in temperature sensor and control valve Real-Time Monitoring broken pipe, and change temperature rise signal into electric signal, thus automatically control the flow of light water and steam in broken pipe.When the special operation condition of overtemperature appears in broken pipe, double-thermocouple can detect that the temperature rise of broken pipe tube wall is excessive in time, and after implementing first fuel oil and combustion gas by emergency shutdown valve, the shutoff of fresh water operates.When the special operation condition of superpressure appears in broken pipe, pressure difference transmitter changes the broken pipe high-voltage signal automatically detected into electric signal, and by the pressure in the automatic discharge line of Pressure Relief Valve.
Steam generation control system is used for automatically controlling the flow of medium in the consumption of the two burner fuel oil of oil gas and combustion gas and one-level cooler and secondary thermal medium device.By the temperature of deep fat in the monitoring waste-heat recoverer outlet temperature of tail gas and one-level cooler Inner eycle liquid and secondary thermal medium device, and convert the electrical signal to gas signal through pneumatic-to-current converter, automatically controlled the pneumatic amount of pneumatic control valve on fuel delivery device or fuel gas supply device again by three-dimensional switching valve, and then automatically adjust the fuel consumption of fuel oil supervisor or the amount of consumed gas of combustion gas supervisor.By monitoring out the temperature of deep fat in deep fat pipe outlet line, automatically adjust the flow of circulation fluid and deep fat via solenoid electric valve; When the operating modes such as pressure drop is excessive, leakage appear in cooling tube or deep fat pipe, emergency shutdown valve automatically can be closed and be stopped the supply of one-level cooler low-temperature circulating liquid; When superpressure operating mode appears in cooling tube or deep fat pipe, Pressure Relief Valve can pressure in automatic discharge line.
Steam generation control system can provide automatic protection during dangerous working condition; when overheated, leakage etc. appears in broken pipe; temperature rise and pressure difference transmitter will detect that temperature and pressure signal changes electric signal into automatically; and by solenoid electric valve, the gas in carbon dioxide canister is discharged in burning body automatically through protection tracheae, the flame extinguishing the two burner of oil gas is protected.And steam generation control system can also be used to realize regular spray, now high-pressure cleaning liquid is first after direct-operated regulator voltage stabilizing, and inflow implements spray operation in spray thrower and lower spray thrower.
One-level cooler has been used for the liquid cooling of burning body forced circulation and has but reclaimed with the waste heat first order; circulation fluid selects the artificial oil of better heat stability under high temperature; cracking temperature meets more than 550 DEG C; one-level cooler comprises for oil cooling service pipe, cooling tube and goes out oil cooling service pipe; confession oil cooling service pipe is the low-temperature circulating liquid after one-level cooler conveying supercharging; go out oil cooling service pipe and then export the circulation fluid having absorbed waste heat; supply oil cooling service pipe and go out oil cooling service pipe to be arranged symmetrically with along burning body, and be all positioned at the top of protection tracheae and pressure safety valve.Cooling tube adopts a steel pipe serpentine bend to form, and entirety is squirrel-cage layout and is embedded in the bitubular of burning body, and interior undertaking body, inner barrel and interior envelope body are close in the inner side of cooling tube, to improve the heat exchange efficiency between one-level cooler and burning body; And outside it and outer undertaking body, keep gap between outer cylinder body and covering body, the cross section of cooling tube be fan-shaped, and wide outside and narrow inside simultaneously, so that the thermal expansion amount of supplementary cooling tube in time.
Secondary thermal medium device be used for the waste heat second level reclaim, will thermal medium post bake export after be heat user heat supply together with the thermal medium of platform boiler.Thermal medium in secondary thermal medium device is deep fat, and is connected by the circulation fluid of connecting tube and one-level cooler, is provided with expansion bends in the middle part of connecting tube, and elbow and ring flange are arranged in two ends.Secondary thermal medium device comprises heat supply oil pipe, upper deep fat pipe, intervalve, lower deep fat pipe and goes out deep fat pipe, heat supply oil pipe is positioned at the bottom of secondary thermal medium device and transports circulation fluid from one-level cooler for it, and goes out deep fat Guan Ze and be positioned at the top of secondary thermal medium device opposite side and the deep fat after exporting post bake.Secondary thermal medium device adopts split type structure so that safeguard, is connected, connected between upper deep fat pipe and lower deep fat pipe by intervalve between each pipeline section by nut.Upper deep fat pipe and lower deep fat pipe all adopt vertical layered to arrange, to reduce flue gas back pressure, interlayer pipeline section is arranged in parallel, and the interlayer distance of upper deep fat pipe and lower deep fat pipe increases respectively, fully to absorb the heat of flue gas, improve the rate of heat exchange between upper and lower deep fat pipe and flue gas.Meanwhile, the layout of every layer of deep fat pipe is similar to broken pipe, and outmost turns is the steel pipe of whole circle, and equidistant serpentine arrangement deep fat pipe in circle, to ensure that deep fat pipe has enough thermal expansion amounts.
Waste-heat recoverer is designed to tilting vessel form, realizes steam generator integrated with waste-heat recoverer by expansion joint, and expansion joint can the thermal expansion amount that causes of effective compensation waste-heat recoverer variations in temperature.The axis of waste-heat recoverer is 45 ° with burning body axis, makes whole Plant arrangement compact, reduces flue gas back pressure further simultaneously.Waste-heat recoverer adopts split type structure, and in it, concentric is furnished with secondary thermal medium device, barrel entire body liner bidirectional stainless steel, and it comprises smoke evacuation body, body of heater and elbow.The upper end of body of heater arranges ring flange and connects with smoke evacuation body, and bottom is fixed by circumferential weld and elbow, and the lower end of elbow is linked together by ring flange and expansion joint.Body of heater adopts column-shaped barrel, and be divided into upper furnace body and lower furnace body two parts, in it, cloth is set up deep fat pipe and lower deep fat pipe successively, and its upper end is provided with spray arm simultaneously.Top and the middle part of upper furnace body are provided with boss, the eyelet in its upper boss and go out deep fat pipe tube wall between interference fit, and interference fit between the tube wall be responsible for of eyelet in the middle part of opposite side in boss and upper spray; Interference fit between the tube wall of the eyelet in the middle part of lower furnace body in boss and heat supply oil pipe.The thin-wall barrel structure that smoke evacuation body adopts cone and bend pipe to combine, in 45 ° between the axis of bend pipe end face and waste-heat recoverer.
Spray thrower is used for the spray operation regularly completed in cigarette ash self-cleaning, it comprises spray thrower and lower spray thrower, wherein go up spray thrower and cleaning showers is carried out to secondary thermal medium device, comprise spray supervisor and upper spray arm, the form of upper spray supervisor employing one pipe two confession, be used for cleaning fluid being flowed to upper spray arm, upper spray arm is divided into two-layer up and down, respectively the upper deep fat pipe of cleaning and lower deep fat pipe.And lower spray thrower carries out cleaning showers to steam generation broken pipe, comprise lower spray supervisor and lower spray arm, lower spray supervisor comprises two-layer up and down, adopt the form of pipe two confession and pipe one confession respectively, be used for cleaning fluid being flowed to lower spray arm, lower spray arm is divided into three layers, respectively cleaning upper broken pipe, middle broken pipe and lower broken pipe.Upper spray arm and lower spray arm are all arranged in cross, connected by cross valve between spray arm, evenly distributed four row cleaning mouths on its ring wall, the axis of all cleaning mouths is all perpendicular to the axis of spray arm, the structure that the inner ring surface cleaning mouth all adopts the face of cylinder and taper seat to combine, cleaning fluid by spray arm enter cleaning mouth after volume constantly reduce simultaneously stream pressure promote gradually, the impulse force of cleaning fluid to cigarette ash can be increased thus.
The technique effect that the present invention can reach is, this steam raising plant employing vertical steam generator and waste-heat recoverer integrated structure, ensure characteristics of compact layout and flue gas back pressure is little; The two burner of oil gas can meet oil-gas two-way double fuel according to oil gas individual injection mouth, produces short flame and flame distribution is even, and the flame simultaneously formed can regulate voluntarily according to fuel pressure or flow; Steam generation broken pipe, according to layering disc type snakelike broken pipe, realizes the high efficient heat exchanging that horizontal baffling adds vertical adverse current, and with this instantaneously producing steam, and broken pipe exists the protection of excessive fresh water, can not salt scale coagulation with heating surface to ensure that broken pipe reliably cools; Broken pipe adopts inner thread steel pipe can avoid fresh water generation film boiling under high pressure conditions, and middle broken pipe adopts bimetallic tube that the problem of corroding easily occurs with broken pipe body layer position in solving; Steam generation control system is used for controlling the flow of light water and steam in broken pipe and the consumption of the two burner fuel oil of oil gas and combustion gas, and realizes broken pipe overtemperature and overpressure protection, makes whole equipment safety reliable; One-level cooler has been used for the liquid cooling of burning body forced circulation but, and realizes the recovery of waste heat two-stage in conjunction with secondary thermal medium device; After spray operation implemented by spray thrower, fuel gas supply device and air supply carry out purging operation simultaneously, finally complete the regular self-cleaning operation of cigarette ash; The steam generation broken pipe of split type layered structure, the burning body of double barrel configurations and waste-heat recoverer, make package unit be easy to dismounting and maintenance.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated, but the present invention is not limited to following examples.
Fig. 1 is the typical structure sketch according to the split type steam raising plant of waste heat two-stage reclaiming type proposed by the invention.
Fig. 2 is the structure diagram of the two burner of oil gas in the split type steam raising plant of waste heat two-stage reclaiming type.
Fig. 3 is the flame generation flow chart of the split type steam raising plant of waste heat two-stage reclaiming type.
Fig. 4 is the structure diagram of body, one-level cooler and lower spray thrower of burning in the split type steam raising plant of waste heat two-stage reclaiming type.
Fig. 5 is the structure diagram of steam generation broken pipe in the split type steam raising plant of waste heat two-stage reclaiming type.
Fig. 6 is that the middle broken pipe of steam generation broken pipe arranges sketch.
Fig. 7 is upper broken pipe and the lower broken pipe layout sketch of steam generation broken pipe.
Fig. 8 is the steam generation flow chart of the split type steam raising plant of waste heat two-stage reclaiming type.
Fig. 9 is the structure diagram of waste-heat recoverer, secondary thermal medium device and upper spray thrower in the split type steam raising plant of waste heat two-stage reclaiming type.
Figure 10 is the waste heat two-stage recovery process figure of the split type steam raising plant of waste heat two-stage reclaiming type.
Figure 11 is the steam generation control system flow chart of the split type steam raising plant of waste heat two-stage reclaiming type.
Figure 12 is self-cleaning and the steam generation broken pipe replacing operation process chart of the split type steam raising plant of waste heat two-stage reclaiming type.
1-waste-heat recoverer in figure, 2-secondary thermal medium device, 3-expansion joint, 4-spray thrower, 5-one-level cooler, 6-burns body, 7-steam generation broken pipe, the two burner of 8-oil gas, 9-two combustion body, 10-two combustion head, 11-diffusion room, 12-fuel chamber, 13-fuel oil room, the two combustion dish of 14-, 15-air supply, 16-fuel gas supply device, 17-fuel delivery device, the outer undertaking body of 18-, 19-is for oil cooling service pipe, 20-protects tracheae, undertaking body in 21-, 22-cooling tube, 23-outer cylinder body, 24-inner barrel, 25-covering body, envelope body in 26-, 27-ash releasing tube, 28-goes out oil cooling service pipe, 29-pressure safety valve, arm is sprayed under 30-, spray supervisor under 31-, 32-feed pipe, the upper broken pipe of 33-, 34-monitors pipe, broken pipe in 35-, broken pipe under 36-, 37-is for steam pipe, 38-discharges fume body, 39-goes out deep fat pipe, 40-intervalve, 41-body of heater, 42-elbow, 43-sprays supervisor, 44-sprays arm, the upper deep fat pipe of 45-, deep fat pipe under 46-, 47-heat supply oil pipe, 48-connecting tube.
Detailed description of the invention
In FIG, the split type steam raising plant of waste heat two-stage reclaiming type is made up of waste-heat recoverer 1, secondary thermal medium device 2, expansion joint 3, spray thrower 4, one-level cooler 5, burning body 6, steam generation broken pipe 7, the two burner 8 of oil gas and steam generation control system.During assembling, first two for oil gas burner 8 is fixed in the middle part of the covering body of burning body 6 by two combustion dish; Then successively inside and outside install combustion body 6 the lower broken pipe of the doffing of cylindrical shell and steam generation broken pipe 7, spray thrower 4 upper strata under spray arm, middle cylinder and middle broken pipe, middle level under spray arm, top cylinder and upper broken pipe and upper strata under spray arm; Then the cooling tube of one-level cooler 5 is arranged in inside and outside burning body 6 in undertaking body, and inserts inside and outside cylindrical shell; Then connect expansion joint 3 and waste-heat recoverer 1 successively again, and the deep fat pipe of secondary thermal medium device 2 is arranged in the body of heater of waste-heat recoverer 1; Finally arrange the instrument of steam generation control system, valve and pipeline.
In FIG, the steam raising plant vertical assembled is on Offshore Heavy Oil Field platform, the smoke evacuation body access smoke evacuation system of waste-heat recoverer 1, the thermal medium system going out deep fat pipe access platform boiler supplying oil cooling service pipe and secondary thermal medium device 2 of one-level cooler 5, the public sea water service system of the spray supervisor access platform of spray thrower 4, the carbon dioxide canister of the protection tracheae access platform of burning body 6, the ash releasing tube of burning body 6 is connected to the open type exhaust system of platform simultaneously, the freshwater system of the feed pipe access platform of steam generation broken pipe 7, and the vapor-liquid separation devices in its downstream is connected to for steam pipe, the fuel delivery device of the two burner 8 of oil gas is connected to the fuel reservoir of platform by fuel oil supervisor, fuel gas supply device is connected to the natural gas storage tank of platform by combustion gas supervisor, air supply is then connected to supply air system by air pipe line, the control instrument of steam generation control system and the utility meter gas system of valve access platform.
In FIG, when steam raising plant needs to debug, first air-tight test is carried out to waste-heat recoverer 1, burning body 6 and steam generation broken pipe 7, and withstand voltage test is carried out to secondary thermal medium device 2, one-level cooler 5 and steam generation broken pipe 7, then, check that whether the lining quality of waste-heat recoverer 1 and burning body 6 barrel bidirectional stainless steel is up to standard, whether there is the defects such as spot corrosion, then, check that whether each split faying face of waste-heat recoverer 1 and burning body 6 is tight, whether the switch of each instrument of steam generation control system and valve connects correctly, finally, igniting test is carried out to the two burner 8 of oil gas, and connect the water supply of steam generation broken pipe 7, check that whether steam quality is up to standard, connect the circulation fluid of one-level cooler 5 and the deep fat supply of secondary thermal medium device 2, check whether compulsory circulative cooling temperature and pressure meets the requirements, connect the instrument air of steam generation control system, check whether source of the gas cleans, dry, after closing flame and steam, connect the water source of spray thrower 4, check whether each cleaning mouth normally works, then the supply air system of fuel gas supply device and air supply is connected, check whether each jet blower normally works.
In fig. 2, two combustion body 9, two combustion 10, air supply 15, fuel gas supply device 16 and fuel delivery device 17 are integrated in one and are fixed on the bottom center place of burning body 6 by two combustion dish 14 by the two burner 8 of oil gas, two combustion 10 is arranged in the center of two combustion body 9, its unique profile formation of structure diffusion room 11, fuel chamber 12 and 13 3, fuel oil room ring cavity simultaneously.Air supply 15, fuel gas supply device 16 and fuel delivery device 17 all adopt independently jet blower, and along two combustion dish 14 by inner and be arranged in order outward, and wherein combustion gas and air injector are arranged in the inside of two combustion 10.
In figure 3, the flame generation flow process of steam raising plant is, when platform associated gas is in liberal supply, the two burner 8 of oil gas adopts combustion gas pattern, high-pressure gas through fuel gas supply device 16 combustion gas supervisor and point gas circuit by entering combustion gas arm, fuel oil room 13 is injected at a high speed again through combustion gas lower floor jet blower, with the combustion gas mixing being injected fuel chamber 12 by combustion gas upper strata jet blower after purging fueling injection nozzle, mixed combustion gas carries out deceleration supercharging in fuel chamber 12, then diffusion room 11 is entered again and the pressure-air Homogeneous phase mixing provided with air supply 15 after its rapid spatial expansion, fully carry out burning and producing flame finally by after automatic ignitor igniting.
When the tolerance or air pressure that supply combustion gas are not enough, combustion gas pattern can automatically switch to fuel oil pattern, now fuel oil need carry out supercharging by gear pump or screw pump, high pressure fuel is responsible for through the fuel oil of fuel delivery device 17 and divides oil circuit by entering fuel oil arm, fine grained oil droplet is produced again after fueling injection nozzle atomization, then to flow in drops and fuel chamber 12 after deceleration supercharging respectively through fuel oil room 13 inner volume expands suddenly, enter diffusion room 11 and after its rapid spatial expansion with pressure-air Homogeneous phase mixing, then through igniting after Thorough combustion formed flame.
In the process that the flame that combustion gas pattern or fuel oil pattern produce upwards flows in diffusion room 11, because cross section of fluid channel increases fast, its flow velocity is reduced rapidly, finally form short flame and also spray in burning body 6.
In the diagram, the cooling tube 22 of one-level cooler 5 is arranged to absorb unnecessary heat in time in the double barrel configurations of burning body 6, and in its cavity, arrange the lower spray arm 30 of spray thrower 4, cleaning fluid enters lower spray arm 30 through lower spray supervisor 31 and is sprayed by cleaning mouth and clean steam generation broken pipe 7.The lower disposed of outer undertaking body 18 and interior undertaking body 21 has protection tracheae 20 for carbon-dioxide fire engine during dangerous working condition and pressure safety valve 29 for earth pressure release during superpressure operating mode, and its top is then provided with for oil cooling service pipe 19 transporting low temperature circulation fluid and goes out oil cooling service pipe 28 and export the circulation fluid absorbing waste heat.For ease of dismounting broken pipe, outer cylinder body 23 and inner barrel 24 adopt split-type design and hold upper broken pipe, middle broken pipe and lower broken pipe successively; The bottom of covering body 25 and interior envelope body 26 is by the inner and outer two burner 8 of oil gas and the ash releasing tube 27 arranged successively, and ash releasing tube 27 is used for getting rid of the cigarette ash in spray operation entrained by cleaning fluid.
In Fig. 5 ~ Fig. 7, upper broken pipe 33, middle broken pipe 35 and lower broken pipe 36 from top to bottom successively with outer cylinder body 23 and inner barrel 24 coaxially arranged, each other carry out UNICOM by monitoring pipe 34, it is provided with the temperature that temperature sensor and double-thermocouple come Real-Time Monitoring broken pipe and interior light water and steam thereof simultaneously.Upper broken pipe 33, middle broken pipe 35 and lower broken pipe 36 each other horizontal cross are put, and high-pressure fluid transports to broken pipe through feed pipe 32, export from top to bottom after baffling flow at high speed by for steam pipe 37.
In fig. 8, the steam generation flow process of steam raising plant is, water at low temperature is after the pressurization of booster pump, broken pipe is delivered to by feed pipe 32, high-temperature flue gas flows along broken pipe gap from bottom to top through rightabout simultaneously, successively with lower broken pipe 36, high-pressure fluid in middle broken pipe 35 and upper broken pipe 33 carries out the high efficient heat exchanging that baffling adds adverse current, flue-gas temperature reduces gradually, water at low temperature first heats the hot water of liquefy gradually in upper broken pipe 33 through low-temperature flue gas thus, then hot water is after monitoring pipe 34 enters middle broken pipe 35, continue heating through flue gas and present the fluid of vehicle repair major state, then after vehicle repair major flows through monitoring pipe 34 enters lower broken pipe 36, heated by high-temperature flue gas and become the high-temperature steam of steam state, final high temperature steam is through exporting for steam pipe 37 and flow into the vapor-liquid separation devices in steam raising plant downstream.
In fig .9, waste-heat recoverer 1 becomes to be integrated with steam generator by expansion joint 3, with the low-temperature flue gas after broken pipe heat exchange after the elbow 42 of waste-heat recoverer 1 commutates, enter body of heater 41 and again carry out heat exchange with the deep fat pipe of secondary thermal medium device 2, finally become the lower tail gas of temperature and enter smoke evacuation system by smoke evacuation body 38.
Secondary thermal medium device 2 is connected with one-level cooler 5 by connecting tube 48, on it, deep fat pipe 45 and lower deep fat pipe 46 are arranged in the upper furnace body of body of heater 41 and the chamber of lower furnace body respectively, and carry out UNICOM by intervalve 40, heat supply oil pipe 47 and go out deep fat pipe 39 and be positioned at the both sides of body of heater 41 and complete the constrained input of deep fat.
Upper spray arm 44 layered arrangement of spray thrower 4 is in the top of upper deep fat pipe 45 and lower deep fat pipe 46, and cleaning fluid enters upper spray arm 44 through upper spray supervisor 43 and sprayed by cleaning mouth and clean secondary thermal medium device 2.
In Fig. 10, the waste heat two-stage recovery process of steam raising plant is, low-temperature circulating liquid is delivered to cooling tube 22 by for oil cooling service pipe 19 after the circulating pump supercharging of platform boiler hot medium system, partial heat simultaneously after high-temperature flue gas and steam generation broken pipe 7 heat exchange is passed to the cooling tube 22 between outer cylinder body 23 and inner barrel 24 with thermal-radiating form, and carry out heat exchange with the continuous up and down circulation fluid that baffling moves in cooling tube 22, the circulation fluid temperature absorbing waste heat rises gradually, discharge finally by going out oil cooling service pipe 28, complete the pressure cooling of the recovery of the waste heat first order and burning body 6 thus.
The circulation fluid of one-level cooler 5 is delivered to deep fat pipe through connecting tube 48 by heat supply oil pipe 47, low-temperature flue gas upwards flows along deep fat ligament simultaneously, baffling heat exchange is carried out successively with the deep fat in lower deep fat pipe 46 and upper deep fat pipe 45, hot oil temperature raises gradually and finally becomes high-temperature hot oil, be heat user heat supply together with the thermal medium of platform boiler after going out deep fat pipe 39 output, and flue-gas temperature reduces further and finally become the lower tail gas of temperature, complete the waste heat second level thus and reclaim.
In fig. 11; steam generation control system controls the flow of light water and steam in broken pipe automatically by the variations in temperature of light water and steam in temperature sensor and control valve monitoring steam generation broken pipe 7; broken pipe overtemperature and overpressure protection is realized by double-thermocouple, emergency shutdown valve and Pressure Relief Valve; automatically control the consumption of fuel oil and combustion gas through pneumatic-to-current converter and three-dimensional switching valve by the temperature of monitoring tail gas and deep fat, automatically adjusted the flow of circulation fluid and deep fat in addition by solenoid electric valve.
In fig. 12, steam raising plant regularly first sprays the self-cleaning operation of post-purge by steam generation control system, wherein spray operation to be completed by spray thrower 4, high-pressure cleaning liquid is after direct-operated regulator voltage stabilizing, enter the lower spray supervisor 31 of lower spray thrower and the upper spray supervisor 43 of upper spray thrower, then clean through lower spray arm 30 and by the ejection of cleaning mouth respectively and go up broken pipe 33, middle broken pipe 35 and lower broken pipe 36 and upper spray arm 44 are also sprayed and the upper deep fat pipe 45 of cleaning and lower deep fat pipe 46 by cleaning mouth, the foreign material such as cigarette ash with cleaning fluid come together in burning body 6 bottom and arrange the open type exhaust system into platform via ash releasing tube 27.
After spray operation, steam generation control system controls air supply 15 and fuel gas supply device 16 carries out purging operation simultaneously, pressure-air flows through fuel gas pipeline and air pipe line and from gas injection nozzle and air injector ejection simultaneously, through fuel oil room 13 after elder generation, fuel chamber 12 and diffusion room 11 enter burning body 6, and then purge the chamber of burning body 6, the lower broken pipe 36 of steam generation broken pipe 7, middle broken pipe 35 and upper broken pipe 33, the chamber of waste-heat recoverer 1 and the lower deep fat pipe 46 of secondary thermal medium device 2 and upper deep fat pipe 45, in this process, cigarette ash etc. enter smoke evacuation system with air-flow by smoke evacuation body 38.
In fig. 12, the steam generation broken pipe of steam raising plant is changed work flow and is, first each studs between outer undertaking body 18 and the top cylinder of outer cylinder body 23 on ring flange is dismantled, put forward the outer undertaking body 18 of waste-heat recoverer 1, secondary thermal medium device 2, expansion joint 3 and burning body 6 and interior undertaking body 21 on the whole, after the cooling tube 22 of one-level cooler 5 departs from the interlayer of outer cylinder body 23 and inner barrel 24, unscrew broken pipe 33 and feed pipe 32 and monitor the namely detachably original upper broken pipe 33 of screw thread between pipe 34, and the upper broken pipe 33 more renewed; Then, each studs between the top cylinder of dismounting outer cylinder body 23 and inner barrel 24 and middle cylinder on ring flange, attachment bolt between lower spray supervisor 31 and lower spray arm 30 on ring flange, and the bolt on monitoring pipe 34 ring flange, after carrying the top cylinder of burning body 6 on the whole, unscrew the namely detachably original middle broken pipe 35 of screw thread between broken pipe 35 and monitoring pipe 34, and the middle broken pipe 35 more renewed; Finally, each studs between the middle cylinder of dismounting outer cylinder body 23 and inner barrel 24 and doffing on ring flange, and the bolt on monitoring pipe 34 ring flange, after carrying the middle cylinder of burning body 6 on the whole, unscrew lower broken pipe 36 and for steam pipe 37 with monitor the namely detachably original lower broken pipe 36 of screw thread between pipe 34, and the lower broken pipe 36 more renewed.
The various embodiments described above are only for illustration of the present invention, and wherein the structure, connected mode etc. of each parts all can change to some extent, and every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (10)
1. the split type steam raising plant of waste heat two-stage reclaiming type, adopts the vertical structure that oil gas individual injection mouth, disc type internal thread broken pipe, Split type combustion room and steam generator are integrated with waste-heat recoverer, it is characterized in that:
The two burner of one oil gas; The two burner vertical of described oil gas is in the bottom of burning body, adopt oil-gas two-way double fuel, by two combustion dish, each parts are integrated in one, wherein the lower end of two combustion dish is by inner and outer layered arrangement successively 1 air injector, 6 gas injection nozzles and 6 fueling injection nozzles, and the upper end of two combustion dish is by inner and outer two combustion head and the two combustion body arranged respectively, and forming fuel oil room from bottom to top, fuel chamber and three, diffusion room annular compartment thus, the axial spacing of three ring cavities increases successively;
One burning body; Described burning body adopts split type double barrel configurations, is covered with one-level cooler between the bitubular; Inner barrel and outer cylinder body include top cylinder, middle cylinder and doffing, and in it, cloth is set up broken pipe, middle broken pipe and lower broken pipe respectively, and the top of three is all furnished with spray arm simultaneously; Interior envelope body adopts cylinder cylindrical shell, and covering body adopts ellipsoidal head;
One steam generation broken pipe; Each pipe of described steam generation broken pipe adopts the single steel pipe of same model, is designed to layering UNICOM structure each other, the flow at high speed from top to bottom of the high-pressure fluid in broken pipe; Steam generation broken pipe adopts split type UNICOM broken pipe, realizes the high efficient heat exchanging that horizontal baffling adds vertical adverse current; All there is excessive fresh water in upper broken pipe and all heating surfaces of middle broken pipe, and in lower broken pipe steam quality all the time lower than 80%; Upper broken pipe and lower broken pipe and middle broken pipe each other vertically horizontal cross put, and all adopt inner thread steel pipe, pitch is 1/4th of broken pipe external diameter, and simultaneously, broken pipe adopts two-layer pipe;
One steam generation control system; Described steam generation control system controls the flow of light water and steam in broken pipe automatically by temperature sensor and control valve, broken pipe overtemperature and overpressure protection is carried out, by monitoring tail gas and the two burner fuel oil of temperature automatic control oil gas of deep fat and the consumption of combustion gas by double-thermocouple and pressure difference transmitter;
One one-level cooler; Described one-level cooler completes the liquid cooling of burning body forced circulation and but reclaims with the waste heat first order, cooling tube adopts a steel pipe serpentine bend to form, entirety is squirrel-cage layout and is embedded in the bitubular of burning body, and the cross section of cooling tube is fan-shaped, and wide outside and narrow inside;
One secondary thermal medium device; Described secondary thermal medium device completes the waste heat second level and reclaims, and adopts split type structure, is connected between upper deep fat pipe and lower deep fat pipe by intervalve, and all adopts vertical layered to arrange, interlayer pipeline section is arranged in parallel;
One waste-heat recoverer; The axis of described waste-heat recoverer is 45 ° with burning body axis, and adopt split type structure, in it, concentric is furnished with secondary thermal medium device, and in upper furnace body and lower furnace body, cloth is set up deep fat pipe and lower deep fat pipe successively;
One spray thrower; The upper spray thrower of described spray thrower carries out cleaning showers to secondary thermal medium device, the form of spray supervisor employing one pipe two confession on it, and lower spray thrower carries out cleaning showers to steam generation broken pipe, its lower spray supervisor comprises two-layer up and down, adopt the form of pipe two confession and pipe one confession respectively, lower spray arm is divided into three layers, respectively cleaning upper broken pipe, middle broken pipe and lower broken pipe; Upper spray arm and lower spray arm are all arranged in cross, evenly distributed four row cleaning mouths on its ring wall.
2. the split type steam raising plant of waste heat two-stage reclaiming type according to claim 1, it is characterized in that: the fuel oil room of the two burner of described oil gas is cylindricality ring cavity, fuel chamber and diffusion room are all in back taper ring cavity, the jet angle of fuel chamber's oil gas is 15 ° ~ 25 °, and the jet angle of diffusion room flame is 90 ° ~ 110 °, in the process that flame upwards flows, because cross section of fluid channel increases fast, its flow velocity is reduced rapidly, finally spray into burning body with short flamed form by the two burner of oil gas;
Six fueling injection nozzles of described fuel delivery device are along the circumferential direction evenly arranged, and coil outermost eyelet interference fit with two combustion, and and between the ring wall of both sides, fuel oil room, adopt linear contact lay; The air injector of air supply and the axis of each fueling injection nozzle and gas injection nozzle are on same vertical plane;
The tapering of the outer ring surface cone of described two combustion head from bottom to top increases successively, and its inside arranges air injector and gas injection nozzle from inside to outside respectively; Air injector adopts multiple-limb line configurations, and the caliber that each air props up jet blower is identical, and the cone line of its axis and outer ring surface upper cone is perpendicular, and its outlet is positioned at the bottom of diffusion room; Gas injection nozzle adopts layered structure, the axis being parallel of upper and lower two-layer jet blower and and all in 30 ° between horizontal plane, upper strata jet blower caliber is greater than lower floor's jet blower caliber simultaneously, upper strata jet blower outlet is positioned at the middle part of fuel chamber, and lower floor's jet blower outlet is then positioned at the bottom of fuel oil room also just to fueling injection nozzle;
The thin wall cylinder structure that described two combustion body adopts cylinder to combine with the conical surface, the top of its conical surface is mutually concordant with the top of pair to fire head.
3. the split type steam raising plant of waste heat two-stage reclaiming type according to claim 1, it is characterized in that: the main body of the inside and outside undertaking body of described burning body adopts the conic tube that tapering is identical, its underpart is evenly arranged four protection tracheaes along taper seat, protection tracheae and carbon dioxide canister are connected, and pressure safety valve is arranged in circumferentially same with protection tracheae;
Be processed with circular eyelet in the middle part of the covering body of described burning body, eyelet and two combustion dish interference fit realize the two burner of oil gas in the location on body of burning; The outer rim of covering body opening eye is provided with ash releasing tube.
4. the split type steam raising plant of waste heat two-stage reclaiming type according to claim 1, it is characterized in that: the upper broken pipe of described steam generation broken pipe, middle broken pipe and lower broken pipe all adopt vertical layered to arrange, every layer of broken pipe entirety is in disc-shape, outmost turns arranges the steel pipe of whole circle, equidistant serpentine arrangement broken pipe in circle;
The broken pipe interlaced arrangement of described upper broken pipe, middle broken pipe and each interlayer of lower broken pipe, and increase successively to each interlamellar spacing of lower broken pipe again from upper broken pipe to middle broken pipe, be respectively a diameter of steel tube and two diameter of steel tube;
The steel pipe successively concentric layout of described upper broken pipe, middle broken pipe and lower broken pipe outmost turns, makes whole steam generation broken pipe be column-shaped barrel structure;
The outer tube of described middle broken pipe adopts and the steel pipe of steam generation broken pipe same model with material, and inner tube then adopts the sheet steel pipe of bidirectional stainless steel material;
Described monitoring pipe realizes upper broken pipe and middle broken pipe and connecting between middle broken pipe and lower broken pipe by nut and ring flange, it is designed with temperature sensor and control valve, automatically monitors the temperature of light water and steam in broken pipe.
5. the split type steam raising plant of waste heat two-stage reclaiming type according to claim 1, it is characterized in that: the steam generation flow process of described steam raising plant is, water at low temperature is after the pressurization of booster pump, broken pipe is delivered to by feed pipe, high-temperature flue gas flows along broken pipe gap from bottom to top through rightabout simultaneously, successively with lower broken pipe, high-pressure fluid in middle broken pipe and upper broken pipe carries out the high efficient heat exchanging that baffling adds adverse current, flue-gas temperature reduces gradually, water at low temperature first heats the hot water of liquefy gradually in upper broken pipe through low-temperature flue gas thus, then hot water is after monitoring pipe enters middle broken pipe, continue heating through flue gas and present the fluid of vehicle repair major state, then after vehicle repair major flows through monitoring pipe enters lower broken pipe, heated by high-temperature flue gas and become the high-temperature steam of steam state, final high temperature steam is through exporting for steam pipe.
6. the split type steam raising plant of waste heat two-stage reclaiming type according to claim 1, it is characterized in that: the temperature variations of light water and steam in the temperature sensor of described steam generation control system and control valve Real-Time Monitoring broken pipe, and change temperature rise signal into electric signal, thus automatically control the flow of light water and steam in broken pipe;
The double-thermocouple of described steam generation control system can detect that the temperature rise of broken pipe tube wall is excessive in time, and after implementing first fuel oil and combustion gas by emergency shutdown valve, the shutoff of fresh water operates; Pressure difference transmitter changes the broken pipe high-voltage signal automatically detected into electric signal, and by the pressure in the automatic discharge line of Pressure Relief Valve;
Described steam generation control system is by the temperature of deep fat in the monitoring waste-heat recoverer outlet temperature of tail gas and one-level cooler Inner eycle liquid and secondary thermal medium device, and convert the electrical signal to gas signal through pneumatic-to-current converter, automatically controlled the pneumatic amount of pneumatic control valve on fuel delivery device or fuel gas supply device again by three-dimensional switching valve, and then automatically adjust the fuel consumption of fuel oil supervisor or the amount of consumed gas of combustion gas supervisor;
Described steam generation control system, by monitoring out the temperature of deep fat in deep fat pipe outlet line, adjusts the flow of circulation fluid and deep fat automatically via solenoid electric valve.
7. the split type steam raising plant of waste heat two-stage reclaiming type according to claim 1, is characterized in that: described one-level cooler for oil cooling service pipe and go out oil cooling service pipe and be arranged symmetrically with along burning body, and be all positioned at protection tracheae and the top of pressure safety valve;
Interior undertaking body, inner barrel and interior envelope body are close in the inner side of described cooling tube, and outside it and outer undertaking body, keep gap between outer cylinder body and covering body;
The waste heat first order reclaims and the pressure cooling process of burning body is, low-temperature circulating liquid is delivered to cooling tube by for oil cooling service pipe after the circulating pump supercharging of platform boiler hot medium system, partial heat simultaneously after high-temperature flue gas and the heat exchange of steam generation broken pipe is passed to the cooling tube between outer cylinder body and inner barrel with thermal-radiating form, and carry out heat exchange with the continuous up and down circulation fluid that baffling moves in cooling tube, the circulation fluid temperature absorbing waste heat rises gradually, discharges finally by going out oil cooling service pipe.
8. the split type steam raising plant of waste heat two-stage reclaiming type according to claim 1, is characterized in that: described secondary thermal medium device is connected by the circulation fluid of connecting tube and one-level cooler, is provided with expansion bends in the middle part of connecting tube;
Connected by nut between each pipeline section of described secondary thermal medium device, the interlayer distance of upper deep fat pipe and lower deep fat pipe increases respectively, and every layer of deep fat pipe is arranged similar to broken pipe, and outmost turns is the steel pipe of whole circle, equidistant serpentine arrangement deep fat pipe in circle;
The flow process that the waste heat second level is reclaimed is, the circulation fluid of one-level cooler is delivered to deep fat pipe through connecting tube by heat supply oil pipe, low-temperature flue gas upwards flows along deep fat ligament simultaneously, baffling heat exchange is carried out successively with the deep fat in lower deep fat pipe and upper deep fat pipe, hot oil temperature raises gradually and finally becomes high-temperature hot oil, through go out deep fat pipe export after together with the thermal medium of platform boiler for heat user heat supply, and flue-gas temperature reduces further and finally become the lower tail gas of temperature.
9. the split type steam raising plant of waste heat two-stage reclaiming type according to claim 1, is characterized in that: described waste-heat recoverer is designed to tilting vessel form, realizes steam generator integrated with waste-heat recoverer by expansion joint; Eyelet in the upper furnace body upper boss of its body of heater and go out deep fat pipe tube wall between interference fit, and interference fit between the tube wall be responsible for of eyelet in the middle part of opposite side in boss and upper spray; Interference fit between the tube wall of the eyelet in the middle part of lower furnace body in boss and heat supply oil pipe;
The thin-wall barrel that the smoke evacuation body of described waste-heat recoverer adopts cone and bend pipe to combine constructs, in 45 ° between the axis of bend pipe end face and waste-heat recoverer.
10. the split type steam raising plant of waste heat two-stage reclaiming type according to claim 1, it is characterized in that: described spray thrower comprises spray thrower and lower spray thrower, on it, the upper spray arm of spray thrower is divided into two-layer up and down, respectively the upper deep fat pipe of cleaning and lower deep fat pipe;
Connected by cross valve between the spray arm of described spray thrower, the axis of all cleaning mouths all perpendicular to the axis of spray arm, the structure that the inner ring surface of cleaning mouth all adopts the face of cylinder and taper seat to combine.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107965749A (en) * | 2017-11-22 | 2018-04-27 | 宁波金凤焊割机械制造有限公司 | Novel steam heat exchanger |
| CN110081401A (en) * | 2019-05-17 | 2019-08-02 | 江苏德克沃热力设备有限公司 | A kind of steam generating equipment recycling waste water residual heat |
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