CN114809989A - Device for heating wellhead natural gas on line and application - Google Patents
Device for heating wellhead natural gas on line and application Download PDFInfo
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- CN114809989A CN114809989A CN202210461493.3A CN202210461493A CN114809989A CN 114809989 A CN114809989 A CN 114809989A CN 202210461493 A CN202210461493 A CN 202210461493A CN 114809989 A CN114809989 A CN 114809989A
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- Prior art keywords
- pipe section
- heating
- catalytic combustion
- flue gas
- natural gas
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 187
- 238000010438 heat treatment Methods 0.000 title claims abstract description 177
- 239000003345 natural gas Substances 0.000 title claims abstract description 94
- 238000007084 catalytic combustion reaction Methods 0.000 claims abstract description 125
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 115
- 239000003546 flue gas Substances 0.000 claims abstract description 115
- 238000012546 transfer Methods 0.000 claims abstract description 102
- 239000002918 waste heat Substances 0.000 claims abstract description 67
- 229910052782 aluminium Inorganic materials 0.000 claims description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000004519 grease Substances 0.000 claims description 7
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 7
- 229920001296 polysiloxane Polymers 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910021389 graphene Inorganic materials 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 8
- 230000003197 catalytic effect Effects 0.000 abstract description 7
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 239000002344 surface layer Substances 0.000 abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 24
- 239000002343 natural gas well Substances 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 4
- 238000009991 scouring Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 natural gas hydrates Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009763 wire-cut EDM Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/005—Heater surrounding production tube
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
Abstract
The invention discloses a device for heating natural gas at a wellhead on line and application thereof, wherein the device comprises a reinforced heat transfer pipe section, a catalytic combustion heating device and a flue gas waste heat utilization device, wherein the catalytic combustion heating device and the flue gas waste heat utilization device are connected and arranged at the outer side of the reinforced heat transfer pipe section; the inner side of the reinforced heat transfer pipe section is provided with a reinforced heat exchange structure; the tail end of the flue gas waste heat utilization device is provided with a flue gas outlet; the outer side of the preheating pipe section is nested with a pipe section outer fin, and the heating pipe section is provided with an upper rib plate and a lower rib plate of the pipeline; end flanges are arranged at two ends of the reinforced heat transfer pipe section. The expansion areas inside and outside the pipe section are realized, and the heat transfer is enhanced at the same time; the natural gas is firstly subjected to open-fire-free low-nitrogen catalytic combustion on the catalytic surface layer of the catalytic combustion plate, and is subjected to enhanced radiation and convective heat exchange with the heating pipe section; and the flue gas generated by combustion continuously scours the outer fins of the preheating pipe section to carry out enhanced convection heat exchange.
Description
Technical Field
The invention belongs to the technical field of wellhead natural gas collection heating devices, and particularly relates to a device for heating wellhead natural gas on line and application thereof.
Background
In recent years, the annual usage amount of natural gas is rapidly increased, and hydrate is generated in the process of natural gas production and gathering. The generation of a small amount of hydrate can reduce the flow area of a gas pipeline, and a large amount of hydrate can cause pipeline equipment blockage, thereby influencing the normal production efficiency of natural gas. Many natural gas wells are located in the north, the pipeline pressure of the natural gas wells is high, the temperature is lower than the dew point temperature of water vapor in winter, natural gas hydrates are easily generated in the process of gathering and transporting natural gas, well mouths or pipelines are blocked, and the efficiency and the yield of natural gas production are influenced. The problem that the pipeline of the wellhead is blocked by the natural gas hydrate is very troublesome due to the fact that the wellhead area of the natural gas well is remote. At present, the main solution to the problem of the blockage of the wellhead pipeline of the gas well is to unblock emptying or to inject methanol, the unblock emptying mode needs a large amount of manpower, the waste of resources can be caused simultaneously, the problem of safety and environmental protection exists, the mode cost of injecting methanol is high, and meanwhile, the mode cost of injecting methanol can not be guaranteed to be capable of effectively acting on the natural gas hydrate. Therefore, a safe, efficient, economic and environment-friendly mode is urgently needed to effectively prevent and control the generation of the hydrate of the wellhead pipeline of the natural gas well.
According to the generation condition of the natural gas hydrate, the generation of the natural gas hydrate can be effectively prevented and the generated hydrate can be effectively discharged by increasing the flowing temperature of the natural gas in the pipeline. The pipe pass between the natural gas well wellhead pipeline and the throttle valve is short, so that the aim of quickly and efficiently heating the natural gas well wellhead pipeline on the short pipe pass is needed. The mainstream natural gas pipeline heating mode in the market at present is heating by a water jacket furnace, and a small part of the natural gas pipeline heating mode adopts a catalytic combustion plate for heating. The method for heating the water jacket furnace needs to be provided with a special boiler room, the occupied space is large, in addition, the water jacket furnace needs to be provided with auxiliary machines such as an air blower, a water pump and the like to supply secondary power, open fire of the water jacket furnace needs to be far away from a well mouth, so that hot water or steam produced by the water jacket furnace needs to be paved with long-distance pipelines and deeply insulated, the heat loss is large, the heating efficiency is extremely low, and the supplemented working medium water needs to be purified, otherwise, scaling is easy to occur, the heat transfer is deteriorated, the long-period safe operation of equipment is influenced, the pollution of the traditional coal-fired and fuel-fired water jacket heating furnace is also large, and the defects are combined, so that the traditional water jacket heating furnace is difficult to be practically applied to gas wells in remote areas; when the catalytic combustion heating technology is adopted, the catalytic combustion plate can be used for a long time by depending on a solar cell panel, the pollution is small, the safety is good, but the heating power of the catalytic combustion heating plate with the traditional structure is too small, a long pipe section is required to heat, the natural gas can be heated by 20 ℃, the catalytic combustion plate is expensive, and the cost investment of long-distance installation is too high; secondly, only radiant heat is utilized in the heating process of the traditional catalytic combustion plate, and a large amount of waste heat is contained in the discharged medium-temperature flue gas and is not utilized, so that the heating efficiency is low, and the waste of heat energy is caused. Therefore, the well head natural gas pipeline is difficult to be heated, modified and reformed in the prior art, and a novel pipe section and a novel device for enhancing heat transfer are required to be designed to improve the heat efficiency so that the well head natural gas pipeline can be applied in large scale in practice.
CN201511031485.1 discloses a heating device for a water jacket furnace, the water jacket furnace and a heating method for the water jacket furnace, which realize integral heating of the whole fire tube, realize sufficient combustion by digitally regulating and controlling the volume ratio of natural gas and air, reduce the consumption of natural gas and achieve the purposes of energy conservation and emission reduction; the patent mainly improves the combustion efficiency of the combustion device and the effect of heating working medium water, but does not solve the problem that the traditional water jacket furnace cannot be applied to gas wells in remote defect areas, and is still not suitable for heating the well heads of the natural gas wells in remote power shortage areas.
CN201410035609.2 discloses a natural gas pipeline heating device called an intrinsically safe flameless water jacket furnace, which replaces an ignition combustion device of a traditional water jacket furnace with a pipeline catalytic combustion device to catalyze and combust natural gas to release heat, so that the safety is improved in comparison, but the heating speed is slow, the heating effect is poor, the target temperature rise cannot be realized in a short pipe pass, and the device is also not suitable for heating pipe sections of gas well heads in remote areas.
At present, a heating device which is easy to install, good in economical efficiency, strong in heating effect, safe, stable and small in secondary power dependence is absent in the market to heat an acquisition pipeline of a natural gas well wellhead in remote areas in the north of China, so that a safe, efficient and extremely compact reinforced heat transfer pipe section structure and device capable of quickly heating and improving the temperature rise of wellhead natural gas are required to be developed, and the purpose of quickly and efficiently heating a short pipe path of wellhead natural gas is achieved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a device for heating wellhead natural gas on line and application thereof, and solves the problem that the traditional water jacket furnace and the traditional catalytic combustion heating device cannot be applied to the wellhead of a gas well in a remote area.
In order to achieve the purpose, the invention adopts the technical scheme that: a device for heating wellhead natural gas on line comprises a reinforced heat transfer pipe section, a catalytic combustion heating device and a flue gas waste heat utilization device, wherein the catalytic combustion heating device is connected with the flue gas waste heat utilization device, the catalytic combustion heating device and the flue gas waste heat utilization device are both shell-shaped, and cavities are formed in the catalytic combustion heating device and the flue gas waste heat utilization device; an air inlet and a natural gas inlet are formed in a shell of the catalytic combustion heating device; the inner side of the reinforced heat transfer pipe section is provided with a reinforced heat exchange structure; the reinforced heat transfer pipe section is divided into a heating pipe section and a preheating pipe section, the flue gas waste heat utilization device is arranged on the outer side of the preheating pipe section, the catalytic combustion heating device is arranged on the outer side of the heating pipe section, a communicated flue gas channel is formed in the reinforced heat transfer pipe section, and a flue gas outlet is formed in the tail end of the flue gas waste heat utilization device; the catalytic combustion heating device is internally provided with catalytic combustion plates which are arranged on two sides of the heating pipe section, and the connecting parts of the catalytic combustion heating device and the flue gas waste heat utilization device and the reinforced heat transfer pipe section are sealed; the outer side of the preheating pipe section is nested with a pipe section outer fin, and the heating pipe section is provided with an upper rib plate and a lower rib plate of the pipeline; end flanges are arranged at two ends of the reinforced heat transfer pipe section.
The top of the catalytic combustion heating device is provided with a flue gas outlet, an isobaric flue is arranged at the flue gas outlet, a plurality of longitudinal heat conducting plates which are equidistant are arranged on upper and lower ribbed plates of a pipeline on the reinforced heat transfer pipe section, and the flow of flue gas is changed into the flue gas outlet at the top of the catalytic combustion heating device to be discharged and enter the flue gas waste heat utilization device through the isobaric flue.
The width of the longitudinal heat conduction plate can be set to be 10 mm-15 mm, the height is 15 mm-30 mm, the distance between the longitudinal heat conduction plates is mm-50 mm, two ends of the longitudinal heat conduction plate are connected and fastened with the upper rib plate and the lower rib plate of the pipeline through bolts, and gaps are filled with high-heat-conductivity-coefficient silicone grease or liquid metal between the longitudinal heat conduction plate and the upper rib plate and the lower rib plate of the pipeline.
The heat exchange structure in the reinforced pipe comprises four groups of extruded aluminum fins which are combined and nested at the inner side of the reinforced heat transfer pipe section by an interpolation extrusion process; the four groups of extruded aluminum fins are formed by splicing four groups of identical fins, the width of each fin is 1-2 mm, and the interval between adjacent fins is 2-5 mm; the density of the middle fins is greater than that of the fins at the periphery, and the four groups of extruded aluminum fins penetrate through the whole pipeline of the reinforced heat transfer pipe section; the four groups of extruded aluminum fins are mutually crossed after being spliced, and the crossing mode of the four groups of extruded aluminum fins is self-crossing or mutual crossing.
The reinforced heat exchange structure comprises two rows of first inner fins arranged in parallel along the inner wall of the steel pipe, and a second inner fin perpendicular to the two rows of first inner fins is arranged between the two rows of first inner fins.
The natural gas catalytic combustion plate is a catalyst carrier fiber blanket; the natural gas inlet is arranged on the side surface of the catalytic combustion heating device, and the air inlet is arranged at the bottom of the catalytic combustion heating device.
The upper and lower ribbed plates of the pipeline are positioned on the heating section of the reinforced heat transfer pipe section and are welded with the heating section, and the upper and lower ribbed plates of the pipeline are made of carbon steel plates, copper plates or aluminum plates with the thickness of 8-16 mm.
The outer surface of the heating section of the heat transfer enhancement pipe section is coated with graphene.
The catalytic combustion heating device is in a cuboid shape, and the size of the catalytic combustion heating device is set to be 500 mm-600 mm in length, 300 mm-350 mm in width and 300 mm-350 mm in height; the smoke waste heat utilization device is cylindrical in shape, and the size of the smoke waste heat utilization device is set to be 150-180 mm in radius and 500-800 mm in height; the length of the whole device is controlled between 1.5m and 1.8m, the diameter of a natural gas inlet is 15mm to 25mm, an air inlet is arranged at a position close to a catalytic combustion plate, the length of the catalytic combustion plate is 350mm to 450mm, the width of the catalytic combustion plate is 10mm to 25mm, and flue gas generated after catalytic combustion directly enters the flue gas waste heat utilization device under the action of air pressure difference.
The catalytic combustion heating device, the flue gas waste heat utilization device and the flue gas outlet jointly form a shell, the shell is symmetrically divided into two parts of shells along the axis, the two parts of shells are fastened through bolts, and the connecting surface of the two parts of shells is sealed; the catalytic combustion heating device and the flue gas waste heat utilization device in the two parts of shells are integrally formed or welded.
The device for utilizing the waste heat of the flue gas is arranged at the front end of the catalytic combustion heating device and used for preheating natural gas in the reinforced heat transfer pipe section, the preheating pipe section in the device for utilizing the waste heat of the flue gas is provided with outer fins, the outer fins are symmetrically arranged about the axial line of the preheating pipe section, the length of the outer fins is between 20 and 30, the length of the outer fins is between 75 and 150mm, and the outer edges of the outer fins are in contact with the shell of the device for utilizing the waste heat of the flue gas.
And an induced draft fan or a thermal chimney is arranged at the smoke outlet.
The device for heating the wellhead natural gas on line is applied to the device for heating the wellhead natural gas on line, or a plurality of devices for heating the wellhead natural gas on line are arranged in series, and adjacent devices for heating the wellhead natural gas on line are connected through flanges.
Compared with the prior art, the invention has at least the following beneficial effects:
the reinforced heat transfer structure in the reinforced heat transfer pipe section is in full contact with the heated natural gas in the pipe for heat transfer, so that the natural gas in the reinforced heat transfer pipe section is quickly and uniformly heated, natural gas hydrate in the natural gas pipe section is eliminated, and the heating power of the heating device in unit length is improved;
the natural gas catalytic combustion is free from open fire, so that natural gas leakage can be effectively prevented from occurring deflagration accidents when encountering open fire, the safety is higher, and the natural gas catalytic combustion is suitable for heating a natural gas wellhead pipe section;
the catalytic combustion has high combustion efficiency, is simultaneously provided with the flue gas waste heat utilization device, has high heat utilization rate of more than 90 percent, is far higher than the traditional catalytic combustion heating device, has low combustion temperature, reduces NO x Discharging;
the integral heating device has compact structure, short pipe section and high efficiency and rapidness in heating, and can realize the purpose of rapidly heating natural gas in front of a throttle valve of the pipe section at the wellhead of the gas well;
the catalytic combustion plate is used as a heat source, and can stably run by depending on an external solar cell panel, so that the dependence on electric power is reduced, the investment cost is reduced, and the catalytic combustion plate is suitable for heating the wellhead of a natural gas well in a remote area;
the two ends of the device are connected by flanges, and can be directly assembled and connected with the existing wellhead pipe section, and the detachable catalytic combustion heating device is convenient to replace and maintain;
compared with a traditional water jacket furnace, water is not needed as a working medium, the risk of heat transfer deterioration caused by pipe section scaling is avoided, the maintenance cost is reduced, the water jacket furnace can stably run for a long time, and the water jacket furnace is suitable for heating the wellhead of a natural gas well in an area with severe conditions;
the ribbed plates of the pipeline can increase the radiation heat transfer area and enhance the radiation heat transfer; the heat on the rib plate can be fully utilized by the pipeline; the device is compact in structure, high in heating efficiency, high in safety and small in electric power dependence, and solves the problems that a traditional water jacket heating furnace is heavy, depends on secondary electric power, has open fire and the like and the problems that a traditional catalytic combustion plate heating device is large in heat investment and low in efficiency.
Furthermore, a draught fan or a thermal chimney is arranged at the smoke outlet, the smoke volume of the whole device is small, the flow speed is low, and the on-way resistance is also low.
Furthermore, the longitudinal heat conducting plate is added, so that the temperatures at two ends of the upper rib plate and the lower rib plate of the pipeline can be better conducted to the reinforced heat transfer pipe section, the heat transfer is further reinforced, meanwhile, the convective scouring heat exchange of the flue gas to the reinforced heat transfer pipe section is increased, and the heat efficiency of the device is improved.
Furthermore, the distance between the fins is controlled to avoid large-area blank in the pipe, so that the disturbance of natural gas in the pipeline is strengthened, and the heat exchange effect in the pipe is guaranteed; the overall arrangement of the fins is dense in the middle and sparse on the periphery, so that the natural gas in the pipe is heated more uniformly; four groups of extruded aluminum fins are applied to the inside of the whole pipeline of the reinforced heat transfer pipe section; the fins of the four groups of extruded aluminum fins are mutually crossed after being spliced, so that the flue gas corridor effect is avoided, the fins are fully washed when gas flows through the pipeline, and the heat transfer effect is enhanced.
Furthermore, the natural gas catalytic combustion plate is a catalyst carrier fiber blanket, the contact surface area of the natural gas and the air on the catalytic surface layer is large, the retention time is long, and the complete catalytic combustion of the natural gas is ensured.
Furthermore, the graphene is coated on the outer surface of the heating section of the reinforced heat transfer pipe section, and the blackness of the outer surface of the heating section of the reinforced heat transfer pipe section is improved to be over 0.98 by utilizing the characteristics of high thermal conductivity and high radiance of high-quality thin-layer graphene, so that the absorption rate of thermal radiation is improved, and the radiation heat transfer is further reinforced.
Drawings
FIG. 1 is a schematic view of the overall structure of a reinforced heat transfer pipe section and apparatus of the present invention;
FIG. 2 is a schematic structural view of a reinforced heat transfer pipe section of the present invention;
FIG. 3 is a schematic diagram of the aluminum inner fin self-intersecting left and right structures of the enhanced heat transfer tube section of the present invention;
FIG. 4 is a partial cross-sectional view of the enhanced heat transfer tube section and device housing of the present invention;
FIG. 5 is a schematic view of the housing of the heating apparatus of the present invention in cooperation with each other;
FIG. 6 is a schematic view of a second type of enhanced heat transfer tube section and apparatus of the present invention;
FIG. 7 is a partial cross-sectional view of a second form of the enhanced heat transfer tube section and device housing of the present invention;
FIG. 8 is a schematic structural view of a second type of reinforced heat transfer pipe section according to the present invention;
FIG. 9 is a schematic structural diagram of a wire-cut steel inner finned tube for a reinforced heat transfer tube segment according to the present invention.
In the figure: 1. a flange; 2. reinforcing the heat transfer pipe section; 3. a catalytic combustion heating device; 4. a flue gas waste heat utilization device; 5. a flue gas outlet; 21. four sets of extruded aluminum fins; 22. a tube outer fin; 23. upper and lower ribbed plates of the pipeline; 24. a longitudinal heat conducting plate; 31. a catalytic combustion plate; 32. an air inlet; 33. a natural gas inlet; 34. a flue gas outlet; 35. and (3) an isobaric flue.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, 2, 4 and 5, the device for heating wellhead natural gas on line comprises a reinforced heat transfer pipe section 2, a catalytic combustion heating device 3 and a flue gas waste heat utilization device 4, wherein the catalytic combustion heating device 3 is connected with the flue gas waste heat utilization device 4, the catalytic combustion heating device 3 and the flue gas waste heat utilization device 4 are both shell-shaped, and the interiors of the shell-shaped and the flue gas waste heat utilization devices are both cavities; an air inlet 32 and a natural gas inlet 33 are formed in the shell of the catalytic combustion heating device 3; the inner side of the reinforced heat transfer pipe section 2 is provided with a reinforced heat exchange structure; the reinforced heat transfer pipe section 2 is divided into a heating pipe section and a preheating pipe section, a flue gas waste heat utilization device 4 is arranged on the outer side of the preheating pipe section, a catalytic combustion heating device 3 is arranged on the outer side of the heating pipe section, a communicated flue gas channel is formed in the reinforced heat transfer pipe section 2, and a flue gas outlet 5 is formed at the tail end of the flue gas waste heat utilization device 4; a catalytic combustion plate 31 is arranged in the catalytic combustion heating device 3, the catalytic combustion plate 31 is arranged on two sides of the heating pipe section, and the connecting parts of the catalytic combustion heating device 3 and the flue gas waste heat utilization device 4 and the reinforced heat transfer pipe section 2 are sealed; the outer side of the preheating pipe section is nested with a pipe section outer fin 22, and the heating pipe section is provided with a pipeline upper rib plate 23 and a pipeline lower rib plate 23; end flanges 1 are arranged at two ends of the reinforced heat transfer pipe section 2. .
The four groups of extruded aluminum fins 21 are positioned inside the reinforced heat transfer pipe section 2, the extruded aluminum inner fins 21 are separately processed into finished products and then are embedded in the reinforced heat transfer pipe section 2, and high-heat-conductivity-coefficient silicone grease or liquid metal is filled between the extruded aluminum inner fins 21 and the inner wall of the reinforced heat transfer pipe section 2 to fill gaps so as to reduce contact thermal resistance; the reinforced heat transfer pipe section 2 comprises a heating pipe section and a preheating pipe section, wherein pipe section outer fins 22 are nested on the preheating pipe section, and upper and lower rib plates 23 of the pipeline are completely welded on the heating pipe section; the middle of the catalytic combustion heating device 3 is provided with a natural gas catalytic combustion plate 31, the bottom of the catalytic combustion heating device is provided with an air inlet 32, and the side wall of the catalytic combustion heating device is provided with a natural gas inlet 33; the catalytic combustion heating device 3, the flue gas waste heat utilization device 4 and the flue gas outlet 5 are integrated, and the flue gas channel is communicated; the flue gas outlet 5 is arranged at the tail end of the flue gas waste heat utilization device 4; the natural gas for catalytic combustion firstly enters from a natural gas inlet 33 of the catalytic combustion heating device 3 and is uniformly distributed on the catalytic surface layer of the catalytic combustion plate 31, the air enters from an air inlet 32 at the bottom of the catalytic combustion heating device 3 and is diffused on the catalytic surface layer of the catalytic combustion plate 31, the natural gas and the air perform catalytic combustion reaction on the catalytic surface layer of the catalytic combustion plate 31, the catalytic combustion plate 31 absorbs a part of heat generated by catalytic combustion and transmits the part of heat to the outer surface of the heating section of the reinforced heat transfer pipe section 2 in a radiation mode, meanwhile, the flue gas generated by catalytic combustion carries a part of heat to firstly wash the outer surface of the heating section of the reinforced heat transfer pipe section 2 and then enters the flue gas waste heat utilization device 4, the outer surface of an outer fin 23 of the preheating pipe section of the reinforced heat transfer pipe section 2 in the flue gas waste heat utilization device 4 is subjected to scouring convection heat transfer, and finally the flue gas waste heat is discharged from a flue gas outlet 5 at the tail end of the flue gas waste heat utilization device 4; the natural gas in the reinforced heat transfer pipe section 2 firstly enters the preheating pipe section for preheating treatment, absorbs the medium-high temperature waste heat of the flue gas in the flue gas waste heat utilization device 4, then enters the heating pipe section, further absorbs the radiation heating of the catalytic combustion plate in the catalytic combustion heating device 3 and the convection heating of the high-temperature flue gas, and finally reaches the target heating temperature.
In the catalytic combustion heating device 3, natural gas enters from a natural gas inlet 33 on the side wall and is uniformly distributed to the catalytic surface layer of the catalytic combustion plate 31, air enters the catalytic combustion heating device 3 from an air inlet 32 at the bottom and is uniformly diffused to the catalytic surface layer of the catalytic combustion plate 31, the natural gas and the air are contacted on the catalytic combustion plate for catalytic reaction, and the catalytic combustion plate 31 absorbs heat released by catalytic combustion of the natural gas; about 50% of the heat released by the catalytic combustion of the natural gas can be transferred to the outer surface of the heating section of the heat transfer enhancement pipe section 2 and the upper and lower rib plates 23 of the pipeline in a radiation mode through the catalytic combustion plate 31, and the heat of the part can be used for heating the natural gas in the heat transfer enhancement pipe section 2 by 100%; the flue gas generated by catalytic combustion carries about 50% of sensible heat, and the flue gas and the outer surface of the heating section of the reinforced heat transfer section 2 are subjected to convective scouring to utilize part of sensible heat, so that the thermal efficiency of the catalytic combustion heating device 3 is over 70%; the catalytic combustion heating device 3 and the flue gas waste heat utilization device 4 are communicated, and flue gas generated by catalytic combustion enters the flue gas waste heat utilization device 4 from the catalytic combustion heating device 3 under the action of air pressure difference.
The pipe section outer fin 22 on the inner side of the flue gas waste heat utilization device 4 is used for strengthening the washing convection heat exchange between the flue gas and the pipe section, the pipe section outer fin 22 is in contact with the shell of the flue gas waste heat utilization device 4, the pipe section outer fin 22 and the strengthened heat transfer pipe section 2 are filled with high-heat-conductivity-coefficient silicone grease or liquid metal and are completely welded to reduce contact thermal resistance, four groups of extruded aluminum fin pieces 21 are arranged inside the strengthened heat transfer pipe section 2 to strengthen the heat exchange between the pipe section and the natural gas, the flue gas waste heat utilization device 4 is arranged in front of the catalytic combustion heating device 3 and plays a role in preheating the natural gas in the pipe section, the catalytic combustion flue gas transfers the heat of the middle-high temperature flue gas to the pipe section outer fin 22 in the flue gas waste heat utilization device 4 and finally transfers the heat to the natural gas in the pipe section, and meanwhile the heat efficiency of the device can be improved to be more than 90%.
The flue gas is discharged from a flue gas outlet 5 at the tail end of the flue gas waste heat utilization device 4, and the flue gas outlet 5 is provided with an induced draft fan or a thermal chimney so as to overcome the resistance of the flue gas when the flue gas passes through the whole heating device.
Referring to fig. 1, as an alternative embodiment, the catalytic combustion heating apparatus 3 has a rectangular shape and is sized to have a length of 500mm to 600mm, a width of 300mm to 350mm, and a height of 300mm to 350 mm; the flue gas waste heat utilization device 4 is cylindrical in shape, and the size is set to be 150 mm-180 mm in radius and 500 mm-800 mm in height; the length of the whole device can be controlled between 1.5m and 1.8m, the structure is extremely compact, and the effect of short-flow quick and efficient heating is achieved; the side plate of the catalytic combustion heating device 3 is provided with a natural gas inlet 33 with the diameter of 15 mm-25 mm, the bottom plate of the catalytic combustion section 3 is provided with an air inlet 32 which is arranged close to the catalytic combustion plate 31, the length of 350 mm-450 mm and the width of 10 mm-25 mm, and the flue gas generated after catalytic combustion directly enters the flue gas waste heat utilization device 4 under the action of air pressure difference.
The present invention will be described with reference to the accompanying drawings.
The catalytic combustion plate 31 is a fiber blanket loaded with a catalyst, has small airflow resistance and large geometric surface area, and is easy to form and install.
The upper and lower ribbed plates 23 of the pipeline are positioned on the heating pipe section of the reinforced heat transfer pipe section 2 and are welded with the heating pipe section, and the upper and lower ribbed plates 23 of the pipeline are made of carbon steel plates, copper plates or aluminum plates with the thickness of 8-16 mm.
The surfaces of the reinforced heat transfer pipe section 2 and the upper and lower ribbed plates 23 of the pipeline in the catalytic combustion heating device 3 are coated with graphene coatings.
The four groups of extruded aluminum fins 21 are combined and nested in the reinforced heat transfer pipe section 2 by an interpolation extrusion method, and comprise four groups of identical fins, each fin is provided with a bend, and the fins are staggered with each other; as shown in FIG. 3, the staggered pattern in which (a) is individual fins may be self-intersecting or (b) interdigitated as shown. The width of each fin is 1 mm-2 mm, and the interval between adjacent fins is 2 mm-5 mm; the density of the middle fins is greater than that of the fins on the periphery, and the four groups of extruded aluminum fins 21 penetrate through the whole pipeline of the reinforced heat transfer pipe section 2; the fins of the four sets of extruded aluminum fins 21 cross each other after being spliced.
As shown in fig. 9, the four sets of extruded aluminum fins 21 may be replaced with wire-cut inner fin steel tubes. The reinforced heat exchange structure comprises two rows of first inner fins arranged in parallel along the inner wall of the steel pipe, and second inner fins vertical to the two rows of first inner fins; the first inner fin and the second inner fin are based on a wire cut electrical discharge machining technology, the whole steel pipe is subjected to wire cutting, the inner fins are obtained, the inner fins are in a fishbone shape, disturbance on natural gas in the pipe sections is enhanced, and the fins with higher heights are thickened; the shape of the inner fin of the steel pipe can be cut once or cut for multiple times, but the shape of the inner fin cut by the general line is not complex for processing and manufacturing; the first inner fin and the second inner fin can also be made of aluminum, an aluminum pipe, the first inner fin and the second inner fin are formed by an extrusion method, the aluminum pipe, the first inner fin and the second inner fin can be integrally extruded and formed, or the aluminum pipe, the first inner fin and the second inner fin can be divided into symmetrical parts to be extruded and formed, and then the reinforced heat transfer pipe section 2 is installed in the formed aluminum pipe, the first inner fin and the second inner fin.
The installation position relation between the heating device shell and the reinforced heat transfer pipe section 2 is shown in fig. 5, the catalytic combustion heating device 3 is divided into two symmetrical heating device shells along the central plane and is installed on two sides of the reinforced heat transfer pipe section 2, the joint of the two heating device shells is connected and fastened by bolts, and the gap of the joint can be sealed by sealant.
Natural gas in the reinforced heat transfer pipe section 2 firstly enters the flue gas waste heat utilization device 4 for preheating treatment, sensible heat of medium-high temperature flue gas is absorbed, then the natural gas enters the catalytic combustion heating device 3 for absorbing radiant heat of the catalytic combustion plate and convection heat of the flue gas, and finally the target heating temperature is reached.
Referring to fig. 6, 7 and 8, the intensified heat transfer pipe section and the device for online high-efficiency heating of wellhead natural gas can also be modified into a type that a flue gas outlet 34 is arranged at the top of a catalytic combustion heating device 3, and an isobaric flue 35 is arranged at the flue gas outlet 34; the upper ribbed plate 23 and the lower ribbed plate 23 of the enhanced heat transfer pipeline are provided with a plurality of longitudinal heat conduction plates 24 at equal intervals, the two ends of each longitudinal heat conduction plate 24 are connected and fastened with the upper ribbed plate 23 and the lower ribbed plate 23 of the pipeline through bolts, the temperature at the two ends of the upper ribbed plate 23 and the lower ribbed plate 23 of the pipeline can be better conducted to the enhanced heat transfer pipeline section 2 by adding the longitudinal heat conduction plates 24, the heat transfer is further enhanced, meanwhile, the convective scouring heat exchange of smoke on the enhanced heat transfer pipeline section 2 is increased, and the heat efficiency of the device is improved; the flow of the flue gas is changed into that the flue gas is discharged from a flue gas outlet 34 at the top of the catalytic combustion heating device 3 and enters the flue gas waste heat utilization device 4 through an isobaric flue 35, and the rest part of the flue gas waste heat utilization device is the same as the strengthened heat transfer pipe section and the strengthened heat transfer pipe section for online high-efficiency heating of wellhead natural gas.
The invention further improves that the width of the longitudinal heat conduction plates 24 can be set to be 10 mm-15 mm, the height is 15 mm-30 mm, the distance between the longitudinal heat conduction plates 24 is 20 mm-50 mm, the two ends of the longitudinal heat conduction plates 24 are connected and fastened with the upper ribbed plate 23 and the lower ribbed plate 23 of the pipeline through bolts, and the gaps between the longitudinal heat conduction plates 24 and the upper ribbed plate 23 of the pipeline are filled with high-heat-conductivity-coefficient silicone grease or liquid metal.
The flue gas waste heat utilization device 4 is arranged at the front end of the catalytic combustion heating device 3 and has a preheating effect on natural gas in the reinforced heat transfer pipe section 2, the reinforced heat transfer pipe section 2 in the flue gas waste heat utilization device 4 is provided with an outer pipe fin 22, the fin arrangement is symmetrical about the axial line of the reinforced heat transfer pipe section, 20-30 fins are arranged, the length of each fin is 75-150 mm, the outer edge of the outer pipe fin 22 is in contact with the shell of the flue gas waste heat utilization device 4, and therefore the best flue gas convection washing heat exchange effect is achieved.
The outer pipe fin 22 may be welded to the reinforced heat transfer pipe section 2, or may be separately machined and then sleeved or attached to the outer side of the reinforced heat transfer pipe section 2, specifically, after the outer pipe fin 22 is fixedly connected to one flexible metal sheet, the flexible metal sheet is attached to the outer side of the reinforced heat transfer pipe section 2, and a joint is filled with high-thermal-conductivity silicone grease or liquid metal; the outer pipe fin 22 is welded on the outer surface of one pipe, the pipe is sleeved outside the reinforced heat transfer pipe section 2, and high-heat-conductivity-coefficient silicone grease or liquid metal is filled between the pipe and the reinforced heat transfer pipe section 2, so that the thermal contact resistance between the outer pipe fin 22 and the reinforced heat transfer pipe section 2 is reduced.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (13)
1. The utility model provides a device of on-line heating well head natural gas which characterized in that: the device comprises a reinforced heat transfer pipe section (2), a catalytic combustion heating device (3) and a flue gas waste heat utilization device (4), wherein the catalytic combustion heating device (3) is connected with the flue gas waste heat utilization device (4), the catalytic combustion heating device (3) and the flue gas waste heat utilization device (4) are both in a shell shape, and the interiors of the catalytic combustion heating device and the flue gas waste heat utilization device are both cavities; an air inlet (32) and a natural gas inlet (33) are formed in a shell of the catalytic combustion heating device (3); the inner side of the reinforced heat transfer pipe section (2) is provided with a reinforced heat exchange structure; the reinforced heat transfer pipe section (2) is divided into a heating pipe section and a preheating pipe section, a flue gas waste heat utilization device (4) is arranged on the outer side of the preheating pipe section, a catalytic combustion heating device (3) is arranged on the outer side of the heating pipe section, a communicated flue gas channel is formed in the reinforced heat transfer pipe section (2), and a flue gas outlet (5) is formed at the tail end of the flue gas waste heat utilization device (4); a catalytic combustion plate (31) is arranged in the catalytic combustion heating device (3), the catalytic combustion plate (31) is arranged on two sides of the heating pipe section, and the connecting part of the catalytic combustion heating device (3) and the flue gas waste heat utilization device (4) and the reinforced heat transfer pipe section (2) is sealed; the outer side of the preheating pipe section is nested with a pipe section outer fin (22), and the heating pipe section is provided with an upper rib plate and a lower rib plate (23) of the pipeline; end flanges (1) are arranged at two ends of the reinforced heat transfer pipe section (2).
2. The apparatus for heating wellhead natural gas on-line according to claim 1, characterized in that: the top of the catalytic combustion heating device (3) is provided with a flue gas outlet (34), an isobaric flue (35) is arranged at the flue gas outlet (34), a plurality of equidistant longitudinal heat-conducting plates (24) are arranged on upper and lower ribbed plates (23) of a pipeline on the reinforced heat-transfer pipe section (2), and the flow of flue gas is changed into the way that the flue gas outlet (34) at the top of the catalytic combustion heating device (3) is discharged and enters the flue gas waste heat utilization device (4) through the isobaric flue (35).
3. The apparatus for heating wellhead natural gas on-line according to claim 2, characterized in that: the width of the longitudinal heat conduction plates (24) can be set to be 10 mm-15 mm, the height of the longitudinal heat conduction plates (24) can be 15 mm-30 mm, the distance (20) between the longitudinal heat conduction plates (24) is 20 mm-50 mm, the two ends of the longitudinal heat conduction plates (24) are connected and fastened with the upper rib plate and the lower rib plate (23) of the pipeline through bolts, and gaps are filled with high-heat-conductivity-coefficient silicone grease or liquid metal between the longitudinal heat conduction plates (24) and the upper rib plate and the lower rib plate (23) of the pipeline.
4. The apparatus for heating wellhead natural gas on-line according to claim 1, characterized in that: the heat exchange structure in the reinforced pipe comprises four groups of extruded aluminum fins (21), and the four groups of extruded aluminum fins (21) are combined and nested on the inner side of the reinforced heat transfer pipe section (2) by an interpolation extrusion process; the four groups of extruded aluminum fins (21) are formed by splicing four groups of identical fins, the width of each fin is 1-2 mm, and the interval between adjacent fins is 2-5 mm; the density of the middle fins is greater than that of the fins at the periphery, and four groups of extruded aluminum fins (21) penetrate through the whole pipeline of the reinforced heat transfer pipe section (2); the four groups of extruded aluminum fins (21) are mutually crossed after being spliced, and the crossing mode of the four groups of extruded aluminum fins (21) is self-crossing or mutual crossing.
5. The apparatus for heating wellhead natural gas on-line according to claim 1, characterized in that: the reinforced heat exchange structure comprises two rows of first inner fins arranged in parallel along the inner wall of the steel pipe, and a second inner fin perpendicular to the two rows of first inner fins is arranged between the two rows of first inner fins.
6. The apparatus for heating wellhead natural gas on-line according to claim 1, characterized in that: the natural gas catalytic combustion plate (31) is a catalyst carrier fiber blanket; the natural gas inlet (33) is arranged on the side surface of the catalytic combustion heating device (3), and the air inlet (32) is arranged at the bottom of the catalytic combustion heating device (3).
7. The apparatus for heating wellhead natural gas on-line according to claim 1, characterized in that: the upper and lower ribbed plates (23) of the pipeline are positioned on the heating pipe section of the reinforced heat transfer pipe section (2) and are welded with the heating pipe section, and the upper and lower ribbed plates (23) of the pipeline are made of carbon steel plates, copper plates or aluminum plates with the thickness of 8-16 mm.
8. The apparatus for heating wellhead natural gas on-line according to claim 1, characterized in that: the outer surface of the heating section of the heat transfer enhancement section (2) is coated with graphene.
9. The apparatus for heating wellhead natural gas on-line according to claim 1, characterized in that: the catalytic combustion heating device (3) is a cuboid, and is set to be 500-600 mm long, 300-350 mm wide and 300-350 mm high; the smoke waste heat utilization device (4) is cylindrical in shape, and the size is set to be 150-180 mm in radius and 500-800 mm in height; the length of the whole device is controlled to be 1.5-1.8 m, the diameter of a natural gas inlet (33) is 15-25 mm, an air inlet (33) is arranged at a position close to a catalytic combustion plate (31), the length of the catalytic combustion plate (31) is 350-450 mm, the width of the catalytic combustion plate is 10-25 mm, and flue gas generated after catalytic combustion directly enters a flue gas waste heat utilization device (4) under the action of air pressure difference.
10. The apparatus for heating wellhead natural gas on-line according to claim 1, characterized in that: the catalytic combustion heating device (3), the flue gas waste heat utilization device (4) and the flue gas outlet (5) jointly form a shell, the shell is symmetrically divided into two parts of shells along the axis, the two parts of shells are fastened through bolts, and the connecting surfaces of the two parts of shells are sealed; the catalytic combustion heating device (3) and the flue gas waste heat utilization device (4) in the two parts of shells are integrally formed or welded.
11. The apparatus for heating wellhead natural gas on-line according to claim 1, characterized in that: the flue gas waste heat utilization device (4) is arranged at the front end of the catalytic combustion heating device (3) and used for preheating natural gas in the reinforced heat transfer pipe section (2), an outer fin (22) is arranged on a preheating pipe section in the flue gas waste heat utilization device (4), the outer fins are symmetrically arranged about the axis of the preheating pipe section and comprise 20-30 outer fins, the length of each outer fin is 75-150 mm, and the outer edge of each outer fin (22) is in contact with the shell of the flue gas waste heat utilization device (4).
12. The apparatus for heating wellhead natural gas on-line according to claim 1, characterized in that: an induced draft fan or a thermal chimney is arranged at the flue gas outlet (5).
13. Use of an apparatus for on-line heating of wellhead natural gas as claimed in any of claims 1 to 12, characterised in that: the device for heating the wellhead natural gas on line is arranged, or a plurality of devices for heating the wellhead natural gas on line are arranged in series, and adjacent devices for heating the wellhead natural gas on line are connected through flanges.
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| CN112627772A (en) * | 2020-12-23 | 2021-04-09 | 威海市鸿扬节能设备有限公司 | Gas-electricity dual-purpose heat pipe heater for oil field well mouth and method |
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| RU2209378C2 (en) * | 2001-09-27 | 2003-07-27 | Институт катализа им. Г.К. Борескова СО РАН | Water heating boiler and its operation method |
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