CN208282146U - Condensing steam injection boiler flue gas waste heat recovering device for oil field - Google Patents
Condensing steam injection boiler flue gas waste heat recovering device for oil field Download PDFInfo
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- CN208282146U CN208282146U CN201820832935.XU CN201820832935U CN208282146U CN 208282146 U CN208282146 U CN 208282146U CN 201820832935 U CN201820832935 U CN 201820832935U CN 208282146 U CN208282146 U CN 208282146U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model relates to a kind of condensing steam injection boiler flue gas waste heat recovering device for oil field.Its technical solution is: pipeloop rack inner wall welding heat preservation fixing piece is for fixing inner thermal insulating layer, absorbing pipe group is to be linked to be a water supply circulation passage by finned tube and elbow welding, including upper tube group and lower tube group, flue gas even distribution deflector, condensation water collection plate oblique weld are fixed on pipeloop bracket；After lower tube group heat absorption of the flue gas Jing Guo absorbing pipe group, its temperature has fallen to flue gas dew point when reaching flue gas even distribution deflector and condensation water collection plate, enter upper tube group using flue gas even distribution deflector and condensation water collection plate, flue gas flow direction is flowed through by Z-type turning, the vapor in flue gas is set to become liquid from gaseous state condensation, to discharge the latent heat in flue gas.Beneficial effect is: waste heat of the utility model for the vapor in recovered flue gas improves boiler feed temperature, reduces exhaust gas temperature, improves boiler thermal efficiency, compact-sized, is easily installed, repairs and replaces.
Description
Technical field
The utility model relates to injection boiler flue gas heat recovery device, in particular to a kind of condensing oil field gas injection
Boiler smoke-gas residual-heat recovering device.
Background technique
Heavy crude heat extraction produces main production position at this stage as oil field, plays pass for the supply of stablizing of crude oil in China
The effect of keyness.And the key equipment of heavy crude heat extraction ----injection boiler is the important leverage of viscous crude production.With to high energy consumption
How the continuous reinforcement that device energy conservation requires further increases the thermal efficiency of injection boiler, reduces unit steam energy consumption, becomes section
It can lower consumption, the key point of the input-output ratio of reduction ton viscous crude.
One oil-field gas injection boiler parameters:
1 often uses injection boiler rated capacity: 9.2t/h, 11.5t/h, 15t/h, 18t/h, 23t/h, 30t/h
2 fuel: oil field is usually two kinds of fuel, crude oil or natural gas with injection boiler at present.
3 flue gas characteristics:
SO is mainly contained in the flue gas that wherein fuel oil steam injection boiler generates2、NOX、CO2、N2、O2With vapor etc., flue gas dew
110 DEG C or so of point.NO is mainly contained in the flue gas that gas steam injection boiler generatesX、CO2、N2、O2With vapor etc., and containing a small amount of
SO2, 60 DEG C of flue gas dew point or so.
Two current injection boiler UTILIZATION OF VESIDUAL HEAT IN statuses:
Contain a large amount of waste heats in the flue gas of injection boiler discharge, current injection boiler utilizes dress without fume afterheat mostly
It sets, only small part installs flue gas waste heat recovery apparatus.These flue gas waste heat recovery apparatus are typically all to be helped using smoke pre-heating
It fires air (the 1st kind of mode) or by smoke pre-heating boiler feedwater (in the way of in the of the 2nd kind), both flue gas waste heat recovery modes is only returned
The part sensible heat in flue gas is received.Because vapor accounting is larger in gas fired-boiler flue gas, and the latent heat of vaporization of vapor is larger.I
In order to improve the utilization rate of combustion gas, sight has been invested the research and development of flue gas condensing recovery of latent heat technology.
Below by taking gas steam injection boiler as an example, analyze fume afterheat using situation:
1 flue gas composition and thermal energy analysis
1Nm3For natural gas when excess air coefficient is 1.1, amount of actual air for combustion needed for burning is about 10.6 m3, exhaust gas volumn
About 12 m3。1 Nm3The Lower heat value 32.6MJ of natural gas, higher calorific value 36.2MJ.The enthalpy of the flue gas generated after burning is seen below
Table:
Table 1: every cubic natural gas that burns generates warm enthalpy table kJ/Nm of flue gas3
The transfer of heat caused by smoke temperature change is sensible heat in flue gas, and the latent heat of vaporization contained by vapor is latent heat,
Namely water is when undergoing phase transition, the heat that discharges or absorb.The volume content of vapor is dived in 15-20% or so in flue gas
Heat can account for 10.97% or so of the low heat valve of natural gas.
It is very big for can be seen that latent heat to account for the specific gravity of heat loss due to exhaust gas from this data.And utilize latent heat, it is necessary to cigarette
Temperature degree is reduced to vapor dew-point temperature hereinafter, the moisture in flue gas is made to become liquid from gaseous state, to discharge Latent heat.
The determination of vapor dew-point temperature in 2 flue gases:
Between 15-20%, dew-point temperature is generally between 60 oC the volume content of vapor in flue gas.In natural gas
Contain H2S also has SO in flue gasX。SOXSulfuric acid vapor, the acid dew point of sulfuric acid vapor can be formed in conjunction with the vapor in flue gas
Temperature is higher than aqueous dew point temperature.So vapor dew point in flue gas can be made to improve.In general flue gas content the more, acid dew point
Temperature is higher.Due to Calculation of Acid Dew Point Temperature complexity and practical flue gas composition changes greatly, so in practical applications using acid
Dew point analysis instrument surveys the acid dew-point temperature under certain operating condition.General flue gas SOXFor content at 0.03% or so, dew-point temperature can
It is estimated by 60 oC or so.
When flue-gas temperature is lower than dew-point temperature, vapor starts to condense in flue gas, and smoke temperature is bigger lower than dew-point temperature, water
The condensation rate of steam is also bigger.Condensation rate is bigger, and recovery of latent heat ratio is also bigger.So to improve flue gas waste heat recovery efficiency,
The refrigerant temperature to exchange heat with flue gas is some more lower than dew-point temperature, could accomplish condensing heat-exchange really.It is estimated by table 1, combustion gas
When the outlet smoke temperature of injection boiler flue gas waste heat recovery apparatus is lower than dew-point temperature 15oC, Water vapor condensation rate can be made to reach 50%.
Three existing injection boiler flue gas heat recovery modes:
There are mainly two types of modes: (1) smoke pre-heating combustion air；(2) conventional smoke pre-heating boiler feedwater.
First way: smoke pre-heating combustion air.Combustion system air feed is generally all derived from outdoor, in the combustion of injection boiler
Air preheater is installed additional in burning machine supply air system, flue gas is made to exchange heat with cold air, supply air temperature can be improved, and improves fuel gas buring
Operating condition improves fire box temperature, is advantageous to the heat transfer of each heating surface of boiler.But since heat capacity of air is smaller, and air capacity by
The limitation of combustion of natural gas theoretical air requirement, its absorbent heat of institute are limited.
The second way: conventional smoke pre-heating boiler feedwater.Heat exchange is carried out using boiler feedwater and flue gas, more than flue gas
Heat is directly entered in boiler water system, realizes waste heat recycling.In this way, the main problem faced is final flue gas row
It puts temperature and necessarily is greater than flue gas dew point, insurmountable set of heat exchange tubes etching problem otherwise will occur.
When flue gas is that water supply carries out heat exchange, the temperature of flue gas can be reduced constantly, when flue-gas temperature is lower than dew point, cigarette
Phase transformation has occurred in the moisture that gaseous state moisture in gas will be condensed into liquid water, that is, flue gas.The big portion of the moisture being condensed out
Branch condenses in set of heat exchange tubes, acid gas component SO while condensed water is precipitated, in flue gas2And a small amount of NOX、
CO2It can be dissolved in condensed water to form weak acid.That is, producing the weak acid of coherent condition in back segment set of heat exchange tubes
Drop, these drops not only can cause to corrode to the tube surface at condensation position, but also can drop onto lower layer's lower position
Prime set of heat exchange tubes on, to cause to corrode to prime heat exchanger tube.Since the flue of injection boiler heat convection part is straight
General formula flue, from the more difficult corrosion prevention measure implemented to drippage acid solution of structure.Therefore, in the heat exchanger tube of lower position
Acid solution in group is constantly assembled, since the heat exchanger tube at this is in the temperature of dew point or more, so the moisture in the acid solution of drippage
It can gradually evaporate, but and then there is acid droplet to fall again ..., the acid strength on such lower part set of heat exchange tubes pipe can be increasingly
It is high.By the accumulative corrosion of drippage acid solution prolonged, under higher temperature, even heat resistance, corrosion resisting property are good
Austenitic stainless steel pipe material can also be destroyed because of corrosion.
Therefore, current flue gas waste heat recovery apparatus exit gas temperature all controls more than dew point, it can only recycle cigarette
Sensible heat in gas.The 50-60% or so of recyclable obvious heat of smoke.Still there is the flue gas higher than dew point to be discharged into atmosphere in this way, no
The latent heat of phase change of moisture in flue gas can be efficiently used, therefore reduction boiler exhaust heat loss cannot be fully met, improve boiler hot
The requirement of efficiency.
Summary of the invention
The purpose of this utility model provides a kind of condensing oil field gas injection aiming at drawbacks described above of the existing technology
Boiler smoke-gas residual-heat recovering device and method are installed on above original annotation boiler furnace convection section for Mist heat recovering, improve pot
Furnace feed temperature reduces exhaust gas temperature, improves boiler thermal efficiency, is effectively reduced boiler operatiopn cost, connection and reasonable arrangement, and structure is tight
It gathers, is easily installed, repairs and replaces.
A kind of condensing steam injection boiler flue gas waste heat recovering device for oil field that the utility model is mentioned, technical solution is:
It is led including absorbing pipe group (1), external thermal insulation case (2), pipeloop bracket (3), inner thermal insulating layer (4), heat preservation fixing piece (5), flue gas even distribution
Flowing plate (6), condensation water collection plate (7) and thermal sleeve (8), pipeloop bracket (3) are the frame of whole device, pipeloop bracket (3)
Inner wall welding heat preservation fixing piece (5) aperture and is welded heat-insulated for fixing inner thermal insulating layer (4), on the side plate on pipeloop bracket (3)
Casing (8), absorbing pipe group (1) are to be linked to be a water supply circulation passage by finned tube and elbow welding, including upper tube group is under
Portion's pipe group is exchanged heat using flue gas and the temperature difference of water supply for absorbing the heat in the flue gas from injection boiler, makes feed temperature
Rise；The elbow part external thermal insulation case (2) for the absorbing pipe group (1) exposed outside pipeloop bracket (3) surrounds and is welded on pipeloop
On bracket (3)；Flue gas even distribution deflector (6), condensation water collection plate (7) oblique weld are fixed on pipeloop bracket (3)；Flue gas warp
It crosses after the lower tube group heat absorption of absorbing pipe group (1), reaches flue gas even distribution deflector (6) and condensation water collection plate (7) Shi Qiwen
Degree has fallen to flue gas dew point, enters on absorbing pipe group (1) using flue gas even distribution deflector (6) and condensation water collection plate (7)
Portion's pipe group, flue gas flow direction are flowed through by Z-type turning, so that the vapor in flue gas is become liquid from gaseous state condensation, to discharge flue gas
In latent heat.
Preferably, above-mentioned condensation water collection plate (7) includes two groups, first group of right side for being fixed on pipeloop bracket (3), the
Two groups of left sides for being fixed on pipeloop bracket (3), and two groups of condensation water collection plates (7) tilt to the center of pipeloop bracket (3), the
The left end point of one group of condensation water collection plate (7) is higher than the right endpoint of second group of condensation water collection plate (7), and second group of condensed water is received
The right endpoint for collecting plate (7) is equipped with drip pipe group (11), inclines in the top of second group of condensation water collection plate (7) equipped with multiple groups
Oblique flue gas even distribution deflector (6) makes when making flue gas by flue gas even distribution deflector (6) and first group of condensation water collection plate (7)
Vapor in flue gas becomes liquid from gaseous state condensation, discharges the latent heat in flue gas, and liquid water passes through drip pipe group
(11) it is discharged.
Preferably, exhaust gases passes are divided into two parts up and down by above-mentioned condensation water collection plate (7), referred to as play smoke-box and upper
Smoke-box, when flue gas passes through first group of condensation water collection plate and flue gas even distribution deflector (6), what is be condensed out drips downwards containing sour water point
It falls, falls on second group of condensation water collection plate, avoid the carbon steel absorbing pipe group pipe for falling on lower part smoke-box, cause to corrode.
Preferably, it is equipped with cavity between the upper tube group and lower tube group of above-mentioned absorbing pipe group (1), pacifies at the cavity
Fill flue gas even distribution deflector (6) and condensation water collection plate (7).
Preferably, the upper tube group of above-mentioned absorbing pipe group (1) is set as water inlet end, and installs intake pressure transmitter (9)
With inflow temperature transmitter (10).
Preferably, the lower tube group of above-mentioned absorbing pipe group (1) is set as water outlet, and installs outlet pressure transmitter (12)
With leaving water temperature transmitter (13).
Preferably, above-mentioned condensation water collection plate (7) is made by corrosion resistant austenitic stainless steel.
The beneficial effects of the utility model are: exhaust gases passes are divided into up and down by the utility model by condensation water collection plate
Two parts can only fall on condensed water when positioned at the drippage downward containing sour water point that the absorbing pipe group tube surface of upper smoke-box is condensed out
It on collecting board, and cannot fall on the carbon steel absorbing pipe group pipe of lower part smoke-box, thus the case where fully absorbing Latent heat
Under, efficiently avoid the corrosion of set of heat exchange tubes；The utility model further increases boiler thermal efficiency, the row of further decreasing
Smoke temperature degree, makes full use of the phase transformation of moisture in flue gas to condense, and the latent heat using water in flue gas by a relatively large margin is cold by fume afterheat
Solidifying recyclable device smog discharge temperature is maintained at flue gas dew point or less and runs, to greatly improve the utilization rate of fume afterheat；
In addition, the utility model is installed on above original annotation boiler furnace convection section for Mist heat recovering, improves boiler and give
Coolant-temperature gage reduces exhaust gas temperature, improves boiler thermal efficiency, boiler operatiopn cost is effectively reduced, connection and reasonable arrangement is compact-sized, easily
In installation, maintenance and replacement.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of the utility model；
Attached drawing 2 is the front schematic view that the utility model is mounted on injection boiler；
Attached drawing 3 is the side schematic view that the utility model is mounted on injection boiler；
In upper figure: absorbing pipe group 1, external thermal insulation case 2, pipeloop bracket 3, inner thermal insulating layer 4, heat preservation fixing piece 5, flue gas even distribution are led
Flowing plate 6, condensation water collection plate 7, thermal sleeve 8, intake pressure transmitter 9, inflow temperature transmitter 10, drip pipe group
11, outlet pressure transmitter 12, leaving water temperature transmitter 13；
Condensing steam injection boiler flue gas waste heat recovering device for oil field a, chimney b, drain valve c, original annotation boiler furnace convection section d,
Condensate drain outlet e.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
Embodiment 1, a kind of condensing steam injection boiler flue gas waste heat recovering device for oil field that the utility model is mentioned, technology
Scheme is: including absorbing pipe group 1, external thermal insulation case 2, pipeloop bracket 3, inner thermal insulating layer 4, heat preservation fixing piece 5, flue gas even distribution deflector
6, condensation water collection plate 7 and thermal sleeve 8, pipeloop bracket 3 are the frames of whole device, and the welding heat preservation of 3 inner wall of pipeloop bracket is solid
Determine part 5 for fixing inner thermal insulating layer 4, aperture and welds thermal sleeve 8 on the side plate on pipeloop bracket 3, absorbing pipe group 1 is by wing
Piece pipe and elbow welding are linked to be a water supply circulation passage, including upper tube group and lower tube group, come from steam injection pot for absorbing
Heat in the flue gas of furnace is exchanged heat using flue gas and the temperature difference of water supply, increase feed temperature；Expose outside pipeloop bracket 3
The elbow part external thermal insulation case 2 of absorbing pipe group 1 is surrounded and is welded on pipeloop bracket 3；Flue gas even distribution deflector 6, condensed water
7 oblique weld of collecting board is fixed on pipeloop bracket 3；After lower tube group heat absorption of the flue gas Jing Guo absorbing pipe group 1, flue gas is reached
Its temperature has fallen to flue gas dew point when uniformly distributed deflector 6 and condensation water collection plate 7, using flue gas even distribution deflector 6 and cold
Condensed water collection plate 7 enters 1 upper tube group of absorbing pipe group, and flue gas flow direction is flowed through by Z-type turning, makes the vapor in flue gas by gaseous state
Condensation becomes liquid, to discharge the latent heat in flue gas.
Wherein, condensation water collection plate 7 includes two groups, and first group of right side for being fixed on pipeloop bracket 3, second group is fixed on pipe
The left side of coil support 3, and two groups of condensation water collection plates 7 are tilted to the center of pipeloop bracket 3, first group of condensation water collection plate 7
Left end point be higher than second group of condensation water collection plate 7 right endpoint, and the right endpoint of second group of condensation water collection plate 7 be equipped with condensation
Water discharge spout group 11 is equipped with the inclined flue gas even distribution deflector 6 of multiple groups in the top of second group of condensation water collection plate 7, makes flue gas
When by flue gas even distribution deflector 6 and first group of condensation water collection plate 7, the vapor in flue gas is made to become liquid from gaseous state condensation
State discharges the latent heat in flue gas, and liquid water is discharged by drip pipe group 11.
In addition, exhaust gases passes are divided into two parts up and down by condensation water collection plate 7, smoke-box and upper smoke-box, flue gas are referred to as played
When by first group of condensation water collection plate and flue gas even distribution deflector 6, what is be condensed out drips downwards containing sour water point, falls on second group
On condensation water collection plate, the carbon steel absorbing pipe group pipe for falling on lower part smoke-box is avoided, causes to corrode.
It is equipped with cavity between the upper tube group and lower tube group of absorbing pipe group 1, flue gas even distribution water conservancy diversion is installed at the cavity
Plate 6 and condensation water collection plate 7.
The upper tube group of absorbing pipe group 1 is set as water inlet end, and installs intake pressure transmitter 9 and inflow temperature transmitter
10。
The lower tube group of absorbing pipe group 1 is set as water outlet, and installs outlet pressure transmitter 12 and leaving water temperature transmitter
13。
Condensation water collection plate 7 is made by corrosion resistant austenitic stainless steel.
A kind of application method for condensing steam injection boiler flue gas waste heat recovering device for oil field that the utility model is mentioned, including
Following procedure:
Firstly, condensing injection boiler flue gas waste heat recovery apparatus a is mounted on injection boiler convection section outlet flue top,
Pipeloop bracket 3 is the frame of whole device, and 3 inner wall of pipeloop bracket welding heat preservation fixing piece 5 is for fixing inner thermal insulating layer 4, pipeloop
Aperture and thermal sleeve 8 is welded on side plate on bracket 3, absorbing pipe group 1 is to be linked to be a water supply by finned tube and elbow welding
Circulation passage is exchanged heat using flue gas and the temperature difference of water supply for absorbing the heat in flue gas, increase feed temperature, pipeloop branch
The elbow part external thermal insulation case 2 for the absorbing pipe group 1 exposed outside frame 3 is surrounded and is welded on pipeloop bracket 3, and flue gas even distribution is led
Flowing plate 6, condensation water collection plate 7 are weldingly fixed on pipeloop bracket 3 according to certain angle and distance, and flue gas is by lower part absorbing pipe
After the heat absorption of group 1, its temperature has fallen to flue gas dew point when reaching flue gas even distribution deflector 6 and condensation water collection plate 7；Flue gas
When entering 1 upper tube group of absorbing pipe group by flue gas even distribution deflector 6 and condensation water collection plate 7, flue gas flow direction is by Z-type turning stream
It crosses, into top smoke-box；
Secondly, as the moisture of flue gas and water supply in the further heat exchange of top smoke-box, flue gas will be undergone phase transition,
Liquid is condensed by gaseous state, to condense in the outer tube surface of the 1 upper tube group of absorbing pipe group of stainless steel material；Work as condensed water
When drop is gathered into big water droplet, it will drop on condensation water collection plate 7, finally by hydrophobic below drip pipe group 11
Valve c is emitted into effluent from boiler tank；The pressure and temperature of water inlet respectively by intake pressure transmitter 9 and inflow temperature transmitter 10 into
Row measurement, and it is transmitted to Boiler Monitoring System, the pressure and temperature of water outlet is respectively by outlet pressure transmitter 12 and leaving water temperature
Transmitter 13 measures, and is transmitted to Boiler Monitoring System, to realize the device by utilizing waste heat recycled to the flue gas condensing waste heat
Using the monitoring of efficiency, the coordinated operation of entire boiler system is adjusted in real time；
Finally, the water supply after flue gas heat exchange heats up, can send to Boiler High Pressure and pump, after high-pressure pump pressurizes, into height
Press heat exchange/vaporization process.
The injection boiler flue gas of embodiment 2, the utility model is led to from bottom to top by the boiler smoke of 150 DEG C (gas fired-boiler)
Crossing the heat exchange with boiler feedwater reduces temperature to 45 DEG C (gas fired-boiler), and 20 DEG C of water supply increases temperature by heat exchange from top to bottom
To 70 DEG C of highest.By taking gas fired-boiler as an example: being more than the Water vapor condensation of half when flue-gas temperature drops to 45oC or so, in flue gas
Out, latent heat utilization rate 51.4%.Big portion is absorbed sensible heat, and sensible heat utilization rate reaches 75%.
Boiler feedwater will not cause other boiler accessory machineries, accessory any after flue gas waste heat for heat exchange is increased to 70oC
It influences.Reach raising boiler thermal efficiency, reduces the purpose of heat loss due to exhaust gas.
The utility model is designed using entire combination, guarantees the function of whole system；The utility model complete equipment cloth
It sets rationally, it is compact-sized, it is easily installed, safeguards and moves, can effectively improve 5% or more the injection boiler thermal efficiency.Device fortune
It is operated when row without personnel, realizes the automatic running of whole device.
Embodiment 3, the injection boiler flue gas that the utility model is mentioned by the boiler smoke of 230 DEG C (oil burning boiler) from lower and
On temperature reduced to 80 DEG C (oil burning boiler) by heat exchange with boiler feedwater, 20 DEG C of water supply is increased by heat exchange from top to bottom
Temperature is to 70 DEG C of highest.By taking gas fired-boiler as an example: solidifying more than the vapor of half in flue gas when flue-gas temperature drops to 45oC or so
It bears, latent heat utilization rate 51.4%.Big portion is absorbed sensible heat, and sensible heat utilization rate reaches 75%.
Boiler feedwater will not cause other boiler accessory machineries, accessory any after flue gas waste heat for heat exchange is increased to 70oC
It influences.Reach raising boiler thermal efficiency, reduces the purpose of heat loss due to exhaust gas.
The utility model is designed using entire combination, guarantees the function of whole system；The utility model complete equipment cloth
It sets rationally, it is compact-sized, it is easily installed, safeguards and moves, can effectively improve 5% or more the injection boiler thermal efficiency.Device fortune
It is operated when row without personnel, realizes the automatic running of whole device.
The above is only the part preferred embodiment of the utility model, anyone skilled in the art
Equivalent technical solution can be modified or is revised as using the technical solution of above-mentioned elaboration.Therefore, practical new according to this
Any simple modification or substitute equivalents that the technical solution of type is carried out belong to the greatest extent the range of the requires of the utility model protection.
Claims (7)
1. a kind of condensing steam injection boiler flue gas waste heat recovering device for oil field, it is characterized in that: including absorbing pipe group (1), external thermal insulation
Case (2), pipeloop bracket (3), inner thermal insulating layer (4), heat preservation fixing piece (5), flue gas even distribution deflector (6), condensation water collection plate (7)
With thermal sleeve (8), pipeloop bracket (3) is the frame of whole device, and pipeloop bracket (3) inner wall welding heat preservation fixing piece (5) is used
Aperture and welded thermal sleeve (8) in fixed inner thermal insulating layer (4), on the side plate on pipeloop bracket (3), absorbing pipe group (1) be by
Finned tube and elbow welding are linked to be a water supply circulation passage, including upper tube group and lower tube group, come from steam injection for absorbing
Heat in the flue gas of boiler is exchanged heat using flue gas and the temperature difference of water supply, increase feed temperature；Dew outside pipeloop bracket (3)
The elbow part external thermal insulation case (2) of absorbing pipe group (1) out is surrounded and is welded on pipeloop bracket (3)；Flue gas even distribution water conservancy diversion
Plate (6), condensation water collection plate (7) oblique weld are fixed on pipeloop bracket (3)；Flue gas passes through the lower tube of absorbing pipe group (1)
After group heat absorption, its temperature has fallen to flue gas dew point when reaching flue gas even distribution deflector (6) and condensation water collection plate (7), then
Enter absorbing pipe group (1) upper tube group by flue gas even distribution deflector (6) and condensation water collection plate (7), flue gas flow direction is turned by Z-type
It is curved to flow through, so that the vapor in flue gas is become liquid from gaseous state condensation, to discharge the latent heat in flue gas.
2. condensing steam injection boiler flue gas waste heat recovering device for oil field according to claim 1, it is characterized in that: described is cold
Condensed water collection plate (7) includes two groups, and first group of right side for being fixed on pipeloop bracket (3), second group is fixed on pipeloop bracket (3)
Left side, and two groups of condensation water collection plates (7) tilt to the center of pipeloop bracket (3), a left side for first group of condensation water collection plate (7)
Endpoint is higher than the right endpoint of second group of condensation water collection plate (7), and the right endpoint of second group of condensation water collection plate (7) is equipped with condensation
Water discharge spout group (11) is equipped with the inclined flue gas even distribution deflector (6) of multiple groups in the top of second group of condensation water collection plate (7),
When making flue gas by flue gas even distribution deflector (6) and first group of condensation water collection plate (7), keep the vapor in flue gas cold by gaseous state
It is solidifying to become liquid, the latent heat in flue gas is discharged, and liquid water is discharged by drip pipe group (11).
3. condensing steam injection boiler flue gas waste heat recovering device for oil field according to claim 2, it is characterized in that: described is cold
Exhaust gases passes are divided into two parts up and down by Condensed water collection plate (7), referred to as play smoke-box and upper smoke-box, and flue gas passes through first group of condensation
When water collecting board and flue gas even distribution deflector (6), what is be condensed out drips downwards containing sour water point, falls on second group of condensation water collection plate
On, the carbon steel absorbing pipe group pipe for falling on lower part smoke-box is avoided, causes to corrode.
4. condensing steam injection boiler flue gas waste heat recovering device for oil field according to claim 1, it is characterized in that: the suction
It is equipped with cavity between the upper tube group and lower tube group of heat pipe heat (1), is installed at the cavity flue gas even distribution deflector (6) and cold
Condensed water collection plate (7).
5. condensing steam injection boiler flue gas waste heat recovering device for oil field according to claim 4, it is characterized in that: the suction
The upper tube group of heat pipe heat (1) is set as water inlet end, and installs intake pressure transmitter (9) and inflow temperature transmitter (10).
6. condensing steam injection boiler flue gas waste heat recovering device for oil field according to claim 4, it is characterized in that: the suction
The lower tube group of heat pipe heat (1) is set as water outlet, and installs outlet pressure transmitter (12) and leaving water temperature transmitter (13).
7. condensing steam injection boiler flue gas waste heat recovering device for oil field according to claim 1, it is characterized in that: the condensation
Water collecting board (7) is made by corrosion resistant austenitic stainless steel.
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| CN108644800A (en) * | 2018-05-31 | 2018-10-12 | 中国石油化工股份有限公司胜利油田分公司现河采油厂 | Condensing steam injection boiler flue gas waste heat recovering device for oil field and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644800A (en) * | 2018-05-31 | 2018-10-12 | 中国石油化工股份有限公司胜利油田分公司现河采油厂 | Condensing steam injection boiler flue gas waste heat recovering device for oil field and method |
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