CN108644800A - Condensing steam injection boiler flue gas waste heat recovering device for oil field and method - Google Patents
Condensing steam injection boiler flue gas waste heat recovering device for oil field and method Download PDFInfo
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- CN108644800A CN108644800A CN201810550768.4A CN201810550768A CN108644800A CN 108644800 A CN108644800 A CN 108644800A CN 201810550768 A CN201810550768 A CN 201810550768A CN 108644800 A CN108644800 A CN 108644800A
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- flue gas
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- pipeloop
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- 239000003546 flue gas Substances 0.000 title claims abstract description 185
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 183
- 239000002918 waste heat Substances 0.000 title claims abstract description 38
- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 153
- 238000009833 condensation Methods 0.000 claims abstract description 71
- 230000005494 condensation Effects 0.000 claims abstract description 71
- 238000009826 distribution Methods 0.000 claims abstract description 37
- 239000007789 gas Substances 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims abstract description 14
- 238000004321 preservation Methods 0.000 claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims description 27
- 239000007924 injection Substances 0.000 claims description 27
- 238000011084 recovery Methods 0.000 claims description 22
- 238000009413 insulation Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 claims description 7
- 238000009834 vaporization Methods 0.000 claims description 5
- 230000008016 vaporization Effects 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008439 repair process Effects 0.000 abstract 1
- 239000002253 acid Substances 0.000 description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 239000000779 smoke Substances 0.000 description 12
- 239000003921 oil Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 7
- 239000003345 natural gas Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003517 fume Substances 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- -1 that is Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
- F22D1/04—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways the tubes having plain outer surfaces, e.g. in vertical arrangement
- F22D1/06—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways the tubes having plain outer surfaces, e.g. in vertical arrangement in horizontal arrangement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/007—Auxiliary supports for elements
- F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chimneys And Flues (AREA)
Abstract
The present invention relates to a kind of condensing steam injection boiler flue gas waste heat recovering device for oil field and methods.Its technical solution is：Pipeloop rack inner wall welding heat preservation fixing piece is for fixing inner thermal insulating layer, endothermic tube 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 holder；After lower tube group heat absorption of the flue gas Jing Guo endothermic tube 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 water vapour in flue gas is set to become liquid from gaseous state condensation, to discharge the latent heat in flue gas.Advantageous effect is：The present invention is used for the waste heat of the water vapour 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 present invention relates to injection boiler flue gas heat recovery device, more particularly to a kind of condensing uphole steam generator
Flue gas waste heat recovery apparatus and method.
Background technology
Heavy crude heat extraction produces main production position at this stage as oil field, and pass is played 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 typically 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 point
110 DEG C or so.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 or so of flue gas dew point.
Two current injection boiler UTILIZATION OF VESIDUAL HEAT IN present situations：
Contain a large amount of waste heats in the flue gas of injection boiler discharge, current injection boiler mostly without flue gas waste heat utilization device,
Only small part installs flue gas waste heat recovery apparatus.These flue gas waste heat recovery apparatus are typically all to utilize the combustion-supporting sky of smoke pre-heating
Gas（1st kind of mode）Or utilize smoke pre-heating boiler feedwater（2nd kind of mode）, both flue gas waste heat recovery modes only recycle
Part sensible heat in flue gas.Because water vapour accounting is larger in gas fired-boiler flue gas, and the latent heat of vaporization of water vapour is larger.We are
The utilization rate for improving combustion gas, has invested sight 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 forms and thermal energy analysis
1Nm3For natural gas when excess air coefficient is 1.1, the required amount of actual air for combustion that burns is about 10.6 m3, exhaust gas volumn is about
For 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 see the table below：
Table 1：Burning generates warm enthalpy table kJ/Nm of flue gas per cubic natural gas3
Heat transfer in flue gas caused by smoke temperature change is sensible heat, and the latent heat of vaporization contained by water vapour is latent heat, also
It is water when undergoing phase transition, the heat for discharging or absorbing.In flue gas the volume content of water vapour 15-20% or so, latent heat can
Account for 10.97% or so of the low heat valve of natural gas.
It is prodigious for can be seen that latent heat to account for the proportion of heat loss due to exhaust gas from this data.And utilize latent heat, it is necessary to cigarette
Temperature degree is reduced to water vapour dew-point temperature hereinafter, the moisture in flue gas is made to become liquid from gaseous state, to discharge Latent heat.
The determination of water vapour dew-point temperature in 2 flue gases:
Between 15-20%, dew-point temperature is generally between 60 oC the volume content of water vapour in flue gas.As contained in natural gas
H2S also has SO in flue gasX。SOXIt can be combined to form sulfuric acid vapor with the water vapour in flue gas, the acid dew-point temperature of sulfuric acid vapor
It is higher than aqueous dew point temperature.So water vapour dew point in flue gas can be made to improve.In general flue gas content the more, acid dew-point temperature
Higher.Due to Calculation of Acid Dew Point Temperature complexity and practical flue gas composition changes greatly, so using acid dew point in practical applications
Analyzer surveys the acid dew-point temperature under certain operating mode.General flue gas SOXFor content at 0.03% or so, dew-point temperature can be by 60
OC or so is estimated.
When flue-gas temperature is less than dew-point temperature, water vapour starts to condense in flue gas, and smoke temperature is bigger less 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 less 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 less than dew-point temperature 15oC, water recovery 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, can improve wind pushing temperature, improves fuel gas buring
Operating mode 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
Combustion of natural gas theoretical air requirement limits, its absorbent heat of institute is 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 recovery.In this way, the main problem faced is that final flue gas is arranged
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 less 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 moisture being condensed out
Branch condenses in set of heat exchange tubes, while condensed water is precipitated, the acid gas component SO 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 to the tube surface at condensation position to cause to corrode, but also can drop onto in lower layer's lower position
Prime set of heat exchange tubes on, to causing 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 dripping acid solution of structure.Therefore, it is 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 air in this way, no
The latent heat of phase change of moisture in flue gas can be efficiently used, therefore reduction boiler exhaust gas heat loss cannot be fully met, improve boiler hot
The requirement of efficiency.
Invention content
The purpose of the present invention provides a kind of condensing uphole steam generator aiming at drawbacks described above of the existing technology
Flue gas waste heat recovery apparatus and method are installed on above original annotation boiler furnace convection section and are used for Mist heat recovering, improve boiler and give
Coolant-temperature gage reduces exhaust gas temperature, improves boiler thermal efficiency, effectively reduces boiler operatiopn cost, connection and reasonable arrangement is compact-sized, easily
In installation, maintenance and replacement.
A kind of condensing steam injection boiler flue gas waste heat recovering device for oil field that the present invention mentions, technical solution are：Including
Endothermic tube group（1）, external thermal insulation case（2）, pipeloop holder（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 holder（3）It is the frame of whole device, pipeloop holder（3）Inner wall
Welding heat preservation fixing piece（5）For fixing inner thermal insulating layer（4）, pipeloop holder（3）On side plate on trepanning and weld thermal sleeve
（8）, endothermic tube group（1）It is that a water supply circulation passage, including upper tube group and lower tube are linked to be by finned tube and elbow welding
Group is exchanged heat using flue gas and the temperature difference of water supply, is made on feed temperature for absorbing the heat in the flue gas from injection boiler
It rises；Pipeloop holder（3）The endothermic tube group that outside is exposed（1）Elbow part external thermal insulation case（2）It surrounds and is welded on pipeloop branch
Frame（3）On；Flue gas even distribution deflector（6）, condensation water collection plate（7）Oblique weld is fixed on pipeloop holder（3）On；Flue gas passes through
Endothermic tube group（1）Lower tube group heat absorption after, reach flue gas even distribution deflector（6）With condensation water collection plate（7）When its temperature
Flue gas dew point is had fallen to, using flue gas even distribution deflector（6）With condensation water collection plate（7）Into endothermic tube group（1）Top
Pipe group, flue gas flow direction are flowed through by Z-type turning, so that the water vapour in flue gas is become liquid from gaseous state condensation, to discharge in flue gas
Latent heat.
Preferably, above-mentioned condensation water collection plate（7）Including two groups, first group is fixed on pipeloop holder（3）Right side,
Two groups are fixed on pipeloop holder（3）Left side, and two groups of condensation water collection plates（7）To pipeloop holder（3）It is centroclinal,
One group of condensation water collection plate（7）Left end point be higher than second group of condensation water collection plate（7）Right endpoint, and second group of condensed water is received
Collect plate（7）Right endpoint be equipped with drip pipe group（11）, in second group of condensation water collection plate（7）Top be equipped with and multigroup incline
Oblique flue gas even distribution deflector（6）, flue gas is made to pass through flue gas even distribution deflector（6）With first group of condensation water collection plate（7）When, make
Water vapour 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）Discharge.
Preferably, above-mentioned condensation water collection plate（7）Exhaust gases passes are divided into two parts up and down, referred to as play smoke-box and upper
Smoke-box, flue gas pass through first group of condensation water collection plate and flue gas even distribution deflector（6）When, 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 endothermic tube group pipe for falling on lower part smoke-box, cause to corrode.
Preferably, above-mentioned endothermic tube group（1）Upper tube group and lower tube group between be equipped with cavity, at the cavity pacify
Fill flue gas even distribution deflector（6）With condensation water collection plate（7）.
Preferably, above-mentioned endothermic tube group（1）Upper tube group be set as water inlet end, and intake pressure transmitter is installed（9）
With inflow temperature transmitter（10）.
Preferably, above-mentioned endothermic tube group（1）Lower tube group be set as water outlet, and discharge pressure transmitter is installed（12）
With leaving water temperature transmitter（13）.
Preferably, above-mentioned condensation water collection plate（7）It 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 present invention mentions, including it is following
Process：
First, condensing injection boiler flue gas waste heat recovery apparatus is mounted on injection boiler convection section outlet flue top, pipeloop
Holder（3）It is the frame of whole device, pipeloop holder（3）Inner wall welding heat preservation fixing piece（5）For fixing inner thermal insulating layer（4）,
Pipeloop holder（3）On side plate on trepanning and weld thermal sleeve（8）, endothermic tube group（1）It is to be connected by finned tube and elbow welding
At a water supply circulation passage, for absorbing the heat in flue gas, is exchanged heat, made on feed temperature using flue gas and the temperature difference of water supply
It rises, pipeloop holder（3）The endothermic tube group that outside is exposed（1）Elbow part external thermal insulation case（2）It surrounds and is welded on pipeloop branch
Frame（3）On, flue gas even distribution deflector（6）, condensation water collection plate（7）It is weldingly fixed on pipeloop holder according to certain angle and distance
（3）On, flue gas is by lower part endothermic tube group（1）Heat absorption after, reach flue gas even distribution deflector（6）With condensation water collection plate
（7）When its temperature have fallen to flue gas dew point；Flue gas passes through flue gas even distribution deflector（6）With condensation water collection plate（7）Into suction
Heat pipe heat（1）When upper tube group, flue gas flow direction is flowed through by Z-type turning, 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, by gas
State is condensed into liquid, to condense in the endothermic tube group of stainless steel material（1）The outer tube surface of upper tube group；Work as condensing drip
When being gathered into big water droplet, condensation water collection plate will be dropped onto（7）On, finally by drip pipe group（11）Following dredges
Water valve is emitted into effluent from boiler tank；The pressure and temperature of water inlet is respectively by intake pressure transmitter（9）With inflow temperature transmitter
（10）It measures, and is transmitted to Boiler Monitoring System, the pressure and temperature of water outlet is respectively by discharge pressure transmitter（12）With
Leaving water temperature transmitter（13）It measures, and is transmitted to Boiler Monitoring System, to realize to the flue gas condensing waste heat recovery
Device by utilizing waste heat utilize efficiency monitoring, adjust the coordinated operation of entire boiler system in real time；
Finally, the water supply after flue gas heat exchange heats up can be sent to Boiler High Pressure and pump, after high-pressure pump pressurizes, be changed into high pressure
Heat/vaporization flow.
The beneficial effects of the invention are as follows：Exhaust gases passes are divided into two parts up and down by the present invention by condensation water collection plate,
When positioned at the drippage downward containing sour water point that the endothermic tube group tube surface of upper smoke-box is condensed out, condensation water collection plate can only be fallen on
On, and cannot fall on the carbon steel endothermic tube group pipe of lower part smoke-box, thus in the case where fully absorbing Latent heat, effectively
Ground avoids the corrosion of set of heat exchange tubes；The invention enables boiler thermal efficiencies to further increase, and further decreases exhaust gas temperature, fully
It is condensed using the phase transformation of moisture in flue gas, the latent heat using water in flue gas by a relatively large margin, by fume afterheat condensate recycling 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 present invention, which is installed on above original annotation boiler furnace convection section, is used for Mist heat recovering, boiler feed temperature, drop are improved
Low exhaust gas temperature improves boiler thermal efficiency, effectively reduces boiler operatiopn cost, connection and reasonable arrangement is compact-sized, is easily installed, ties up
It repaiies and replaces.
Description of the drawings
Attached drawing 1 is the structural schematic diagram of the present invention；
Attached drawing 2 is the front schematic view that the present invention is mounted on injection boiler；
Attached drawing 3 is the side schematic view that the present invention is mounted on injection boiler；
In upper figure：Endothermic tube group 1, external thermal insulation case 2, pipeloop holder 3, inner thermal insulating layer 4, heat preservation fixing piece 5, flue gas even distribution deflector
6, condensation water collection plate 7, thermal sleeve 8, intake pressure transmitter 9, inflow temperature transmitter 10, drip pipe group 11,
Discharge 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, condensation
Water outlet e.
Specific implementation mode
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Embodiment 1, a kind of condensing steam injection boiler flue gas waste heat recovering device for oil field that the present invention mentions, technical solution
It is：Including endothermic tube group 1, external thermal insulation case 2, pipeloop holder 3, inner thermal insulating layer 4, heat preservation fixing piece 5, flue gas even distribution deflector 6, cold
Condensed water collection plate 7 and thermal sleeve 8, pipeloop holder 3 are the frame of whole device, 3 inner wall of pipeloop holder welding heat preservation fixing piece 5
Trepanning and thermal sleeve 8 is welded for fixing inner thermal insulating layer 4, on the side plate on pipeloop holder 3, endothermic tube group 1 is by finned tube
It is linked to be a water supply circulation passage, including upper tube group and lower tube group with elbow welding, for absorbing from injection boiler
Heat in flue gas is exchanged heat using flue gas and the temperature difference of water supply, feed temperature is made to increase；The heat absorption that 3 outside of pipeloop holder is exposed
The elbow part external thermal insulation case 2 of pipe group 1 is surrounded and is welded on pipeloop holder 3；Flue gas even distribution deflector 6, condensation water collection
7 oblique weld of plate is fixed on pipeloop holder 3；After lower tube group heat absorption of the flue gas Jing Guo endothermic tube group 1, flue gas even distribution is reached
Its temperature has fallen to flue gas dew point when deflector 6 and condensation water collection plate 7, using flue gas even distribution deflector 6 and condensed water
Collecting board 7 enters 1 upper tube group of endothermic tube group, and flue gas flow direction is flowed through by Z-type turning, and the water vapour in flue gas is made to be condensed by gaseous state
Become 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 holder 3, second group is fixed on pipe
The left side of coil support 3, and two groups of condensation water collection plates 7 are to the centroclinal of pipeloop holder 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 multigroup inclined flue gas even distribution deflector 6 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 water vapour 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 endothermic tube 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 endothermic tube 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 endothermic tube group 1 is set as water inlet end, and installs intake pressure transmitter 9 and inflow temperature transmitter
10。
The lower tube group of endothermic tube group 1 is set as water outlet, and installs discharge pressure transmitter 12 and leaving water temperature transmitter
13。
Condensation water collection plate 7 is made by corrosion resistant austenitic stainless steel.
It is used for more than recovered flue gas in use, fume afterheat condensate recycling device is installed on above original annotation boiler furnace convection section d
Heat, and boiler feedwater is connect with endothermic tube group, it is transported come the safety and stability of monitoring device by inlet and outlet pressure, temperature sensing assembly
Row.Drain valve c in drip pipe group is by condensed water elimination to effluent from boiler tank.
A kind of application method for condensing steam injection boiler flue gas waste heat recovering device for oil field that the present invention mentions, including it is following
Process：
First, condensing injection boiler flue gas waste heat recovery apparatus a is mounted on injection boiler convection section outlet flue top, pipeloop
Holder 3 is the frame of whole device, and 3 inner wall of pipeloop holder welding heat preservation fixing piece 5 is for fixing inner thermal insulating layer 4, pipeloop holder 3
On side plate on trepanning and weld thermal sleeve 8, endothermic tube group 1 is that be linked to be a water supply circulation by finned tube and elbow welding logical
Road is exchanged heat using flue gas and the temperature difference of water supply for absorbing the heat in flue gas, so that feed temperature is increased, outside pipeloop holder 3
The elbow part external thermal insulation case 2 of the endothermic tube group 1 of exposing is surrounded and is welded on pipeloop holder 3, flue gas even distribution deflector 6,
Condensation water collection plate 7 is weldingly fixed on according to certain angle and distance on pipeloop holder 3, and flue gas is by lower part endothermic tube group 1
After 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；Flue gas passes through
When flue gas even distribution deflector 6 and condensation water collection plate 7 enter endothermic tube 1 upper tube group of group, flue gas flow direction is flowed through by Z-type turning,
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, by gas
State is condensed into liquid, to condense in stainless steel material 1 upper tube group of endothermic tube group outer tube surface；When condensing drip is poly-
When integrating big water droplet, it will drop onto on condensation water collection plate 7, finally by the drain valve c below drip pipe group 11
It is emitted into effluent from boiler tank；The pressure and temperature of water inlet is carried out by intake pressure transmitter 9 and inflow temperature transmitter 10 respectively
It measures, and is transmitted to Boiler Monitoring System, the pressure and temperature of water outlet is become by discharge pressure transmitter 12 and leaving water temperature respectively
It send device 13 to measure, and is transmitted to Boiler Monitoring System, to realize the device by utilizing waste heat profit to the flue gas condensing waste heat recovery
With 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 be sent to Boiler High Pressure and pump, after high-pressure pump pressurizes, be changed into high pressure
Heat/vaporization flow.
Embodiment 2, injection boiler flue gas of the invention by 150 DEG C (gas fired-boiler) boiler smoke from bottom to top by with
The heat exchange of boiler feedwater reduces temperature to 45 DEG C (gas fired-boilers), and 20 DEG C of water supply increases temperature to most by heat exchange from top to bottom
It is 70 DEG C high.By taking gas fired-boiler as an example：When flue-gas temperature drops to 45oC or so, the water recovery in flue gas more than half goes out, and dives
Heat utilization efficiency 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.
Present invention employs entire combination designs, ensure the function of whole system；Complete equipment connection and reasonable arrangement of the present invention, knot
Structure is compact, is easily installed, safeguards and moves, and can effectively improve 5% or more the injection boiler thermal efficiency.The device is not necessarily to when running
Personnel operate, and realize the automatic running of whole device.
Embodiment 3, the injection boiler flue gas that the present invention mentions are led to from bottom to top by the boiler smoke of 230 DEG C (oil burning boiler)
Crossing the heat exchange with boiler feedwater reduces temperature to 80 DEG C (oil burning boilers), 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：It is more than the water recovery of half when flue-gas temperature drops to 45oC or so, in flue gas
Go 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.
Present invention employs entire combination designs, ensure the function of whole system；Complete equipment connection and reasonable arrangement of the present invention, knot
Structure is compact, is easily installed, safeguards and moves, and can effectively improve 5% or more the injection boiler thermal efficiency.The device is not necessarily to when running
Personnel operate, and realize the automatic running of whole device.
The above, is only the part preferred embodiment of the present invention, and any technical person familiar with the field may profit
Equivalent technical solution is changed or is revised as with the technical solution of above-mentioned elaboration.Therefore, technology according to the present invention
Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.
Claims (8)
1. a kind of condensing steam injection boiler flue gas waste heat recovering device for oil field, it is characterized in that：Including endothermic tube group（1）, external thermal insulation
Case（2）, pipeloop holder（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 holder（3）It is the frame of whole device, pipeloop holder（3）Inner wall welding heat preservation fixing piece（5）With
In fixed inner thermal insulating layer（4）, pipeloop holder（3）On side plate on trepanning and weld thermal sleeve（8）, endothermic tube group（1）Be by
Finned tube is linked to be a water supply circulation passage, including upper tube group and lower tube group with elbow welding, and steam injection is come from for absorbing
Heat in the flue gas of boiler is exchanged heat using flue gas and the temperature difference of water supply, feed temperature is made to increase；Pipeloop holder（3）Outside dew
The endothermic tube group gone out（1）Elbow part external thermal insulation case（2）It surrounds and is welded on pipeloop holder（3）On；Flue gas even distribution water conservancy diversion
Plate（6）, condensation water collection plate（7）Oblique weld is fixed on pipeloop holder（3）On；Flue gas passes through endothermic tube group（1）Lower tube
After group heat absorption, flue gas even distribution deflector is reached（6）With condensation water collection plate（7）When its temperature have fallen to flue gas dew point, then
By flue gas even distribution deflector（6）With condensation water collection plate（7）Into endothermic tube group（1）Upper tube group, flue gas flow direction are turned by Z-type
It is curved to flow through, so that the water vapour 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）Including two groups, first group is fixed on pipeloop holder（3）Right side, second group is fixed on pipeloop holder（3）'s
Left side, and two groups of condensation water collection plates（7）To pipeloop holder（3）Centroclinal, first group of condensation water collection plate（7）A left side
Endpoint is higher than second group of condensation water collection plate（7）Right endpoint, and second group of condensation water collection plate（7）Right endpoint be equipped with condensation
Water discharge spout group（11）, in second group of condensation water collection plate（7）Top be equipped with multigroup inclined flue gas even distribution deflector（6）,
Flue gas is set to pass through flue gas even distribution deflector（6）With first group of condensation water collection plate（7）When, keep the water vapour in flue gas cold by gaseous state
It is solidifying to become liquid, the latent heat in flue gas is discharged, and liquid water passes through drip pipe group（11）Discharge.
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
Condensed water collection plate（7）Exhaust gases passes are divided into two parts up and down, smoke-box and upper smoke-box, flue gas is referred to as played to pass through first group of condensation
Water collecting board and flue gas even distribution deflector（6）When, what is be condensed out drips downwards containing sour water point, falls on second group of condensation water collection plate
On, the carbon steel endothermic tube 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
Heat pipe heat（1）Upper tube group and lower tube group between be equipped with cavity, at the cavity install flue gas even distribution deflector（6）With it is 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
Heat pipe heat（1）Upper tube group be set as water inlet end, and intake pressure transmitter is installed（9）With 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
Heat pipe heat（1）Lower tube group be set as water outlet, and discharge pressure transmitter is installed（12）With 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）It is made by corrosion resistant austenitic stainless steel.
8. a kind of use of condensing steam injection boiler flue gas waste heat recovering device for oil field as described in any one of claim 1-7
Method, it is characterized in that including following procedure：
First, condensing injection boiler flue gas waste heat recovery apparatus is mounted on injection boiler convection section outlet flue top, pipeloop
Holder（3）It is the frame of whole device, pipeloop holder（3）Inner wall welding heat preservation fixing piece（5）For fixing inner thermal insulating layer（4）,
Pipeloop holder（3）On side plate on trepanning and weld thermal sleeve（8）, endothermic tube group（1）It is to be connected by finned tube and elbow welding
At a water supply circulation passage, for absorbing the heat in flue gas, is exchanged heat, made on feed temperature using flue gas and the temperature difference of water supply
It rises, pipeloop holder（3）The endothermic tube group that outside is exposed（1）Elbow part external thermal insulation case（2）It surrounds and is welded on pipeloop branch
Frame（3）On, flue gas even distribution deflector（6）, condensation water collection plate（7）It is weldingly fixed on pipeloop holder according to certain angle and distance
（3）On, flue gas is by lower part endothermic tube group（1）Heat absorption after, reach flue gas even distribution deflector（6）With condensation water collection plate
（7）When its temperature have fallen to flue gas dew point；Flue gas passes through flue gas even distribution deflector（6）With condensation water collection plate（7）Into suction
Heat pipe heat（1）When upper tube group, flue gas flow direction is flowed through by Z-type turning, 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, by gas
State is condensed into liquid, to condense in the endothermic tube group of stainless steel material（1）The outer tube surface of upper tube group；Work as condensing drip
When being gathered into big water droplet, condensation water collection plate will be dropped onto（7）On, finally by drip pipe group（11）Following dredges
Water valve is emitted into effluent from boiler tank；The pressure and temperature of water inlet is respectively by intake pressure transmitter（9）With inflow temperature transmitter
（10）It measures, and is transmitted to Boiler Monitoring System, the pressure and temperature of water outlet is respectively by discharge pressure transmitter（12）With
Leaving water temperature transmitter（13）It measures, and is transmitted to Boiler Monitoring System, to realize to the flue gas condensing waste heat recovery
Device by utilizing waste heat utilize efficiency monitoring, adjust the coordinated operation of entire boiler system in real time；
Finally, the water supply after flue gas heat exchange heats up can be sent to Boiler High Pressure and pump, after high-pressure pump pressurizes, be changed into high pressure
Heat/vaporization flow.
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| CN201810550768.4A CN108644800A (en) | 2018-05-31 | 2018-05-31 | Condensing steam injection boiler flue gas waste heat recovering device for oil field and method |
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| CN201810550768.4A CN108644800A (en) | 2018-05-31 | 2018-05-31 | Condensing steam injection boiler flue gas waste heat recovering device for oil field and method |
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| CN109386827A (en) * | 2018-11-29 | 2019-02-26 | 北京富士特锅炉有限公司 | A kind of coil tubes condensing coal economizer |
| CN109761273A (en) * | 2019-01-29 | 2019-05-17 | 北京拓首能源科技股份有限公司 | A kind of oxygen heating furnace |
| CN114321963A (en) * | 2021-12-27 | 2022-04-12 | 湖南金牛化工有限公司 | Heat exchanger structure for boiler flue gas waste heat utilization system |
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Effective date of registration: 20200509 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: China Petroleum & Chemical Corp. Applicant after: SINOPEC SHENGLI OILFIELD Co. Applicant after: SHENGLI OIL FIELD SHENGJI PETROLEUM EQUIPMENT Co.,Ltd. Address before: 257000 No. 4, Jining Road, Dongying District, Shandong, Dongying Applicant before: CHINA PETROLEUM & CHEMICAL CORPORATION SHENGLI OILFIELD BRANCH XIANHE OIL EXTRACTION PLANT Applicant before: SHENGLI OIL FIELD SHENGJI PETROLEUM EQUIPMENT Co.,Ltd. |
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Application publication date: 20181012 |