CN113970253A - Large-section air-cooling condensing single-row pipe - Google Patents
Large-section air-cooling condensing single-row pipe Download PDFInfo
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- CN113970253A CN113970253A CN202010708736.XA CN202010708736A CN113970253A CN 113970253 A CN113970253 A CN 113970253A CN 202010708736 A CN202010708736 A CN 202010708736A CN 113970253 A CN113970253 A CN 113970253A
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- 238000001816 cooling Methods 0.000 title claims abstract description 100
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 230000005494 condensation Effects 0.000 claims abstract description 9
- 238000009833 condensation Methods 0.000 claims abstract description 9
- 238000005192 partition Methods 0.000 claims description 24
- 239000007769 metal material Substances 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 239000003575 carbonaceous material Substances 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- 229910052755 nonmetal Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 1
- 238000012546 transfer Methods 0.000 abstract description 4
- 238000009423 ventilation Methods 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 abstract description 2
- 230000002950 deficient Effects 0.000 abstract 1
- 238000009826 distribution Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005399 mechanical ventilation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
Abstract
The area of the inner section of the base pipe is 38 to 138 square centimeters which is 4 to 104 square centimeters larger than that of the inner section of the single-row pipe with the current general specification of 219 multiplied by 19 multiplied by 1.5, so that the resistance of the exhaust steam is greatly reduced; the liquid flow channels are arranged on the two sides in the pipe to timely shunt the condensed water, so that the single-row pipe can enter and exit the exhaust steam downwards under the condition of vertical or vertical arrangement, the steam-liquid countercurrent operation is safe and reliable, and the single-row pipe has good exhaust steam condensation heat transfer film coefficient and the function of the exhaust steam channel; therefore, the large-section air-cooling condensing single-row pipe can form air-cooling condensing pipe bundles which are connected in series in multiple stages in the air, and further a natural ventilation direct air cooling island is formed, so that the occupied area can be greatly reduced by the indirect air cooling island, the steel consumption is reduced, and a key heat exchange element is provided for a large unit of thermal power generation in a water-deficient area and a technical device for realizing direct air-cooling condensing in two machines and one tower.
Description
Technical Field
The invention belongs to the field of heat exchange, and particularly relates to an air-cooling condensing finned tube which directly carries out heat exchange type partition wall condensing on exhaust steam of a steam turbine by using air as a cooling medium.
Background
In the existing air-cooled power plant, the exhaust steam of the steam turbine directly enters an air cooler for condensation, which is called direct air cooling for short, and the air-cooled condensing element of the existing air-cooled power plant is widely adopted in fig. 1, fig. 2 and fig. 3, the specification of a base pipe is that the length is multiplied by the width and the wall thickness is 219 mm multiplied by 19 mm multiplied by 1.5mm, the internal exhaust steam circulation section is 34 square cm, the wall thickness is 1.5mm, and the pipe inner section is: the length 219-2 x 1.5 is 216 mm, the width 19-2 x 1.5 is 16 mm, the length-width ratio is 216 ÷ 16 is 13.5 flat single-row heat exchange element, also called single-row tube, it has the steam cross section relatively large, the condensate is separated relatively well; the cooling air circulation resistance of the fins outside the tube is relatively small, especially the cleaning effect of the radiating fins is far better than that of an elliptical or circular base tube, the cooling air circulation resistance is particularly suitable for the A-shaped inclined arrangement of mechanical ventilation shown in figure 4, and the cooling air circulation resistance is widely applied to direct air-cooled condensers of power plants for many years. The direct air-cooling condensing single-row tube bundle of the power plant formed by the 219 x 19 x 1.5 single-row tube structure with the current general specification has already made DL/T245-2012, the standard of the power industry of the people's republic of China, and can only be used for the inclined arrangement shown in the figure 4 all the time, thereby greatly limiting the design of the air-cooling condenser with better performance and lower investment.
Because:
firstly, the leading-out mode of the exhaust steam of the steam turbine cannot be changed, and the lower part of the exhaust port of the low-pressure cylinder of the steam turbine has a plurality of advantages, so that the steam power generation can not be changed for more than 100 years and 100 years later, and the exhaust steam pipeline adopting air to directly cool and condense the steam is usually led out from the ground of a steam turbine plant and cannot be changed;
secondly, the use and arrangement mode brought by the existing single-row tube structure cannot be changed, and the single-row tube structure developed in the last 90 th century has the best structure from the requirement of optimal air cooling and condensing. The mode is also the only effective arrangement and use mode, and the A-shaped mode with the apex angle of 60 degrees shown in figure 4 is arranged on a large platform with the height of tens of meters;
energy saving and consumption reduction and cost reduction need direct air cooling condenser to be improved, and over 30 years, along with the strong social demands for energy saving and emission reduction and cost reduction, direct air cooling condenser saves the power consumption of a fan and the investment of a fan and a large air cooling platform, and an element of a novel mechanism of the air cooling condenser without the fan and a large high-altitude platform is urgently needed, so that a key support is provided for a new generation of direct air cooling condenser with low energy consumption, low investment and high efficiency.
CN202483645U, CN202485480U, a single-row tube air-cooling heat dissipation tube bundle is the same invention, in order to solve the resistance and freeze-proofing in the single-row tube, a structure of increasing the length of an inlet section is adopted to form a special-shaped structure with larger processing difficulty, the structure is complex in manufacturing process and increased in material cost, and a steam distribution main pipe still needs to be arranged above the structure, so that the cost of a steam distribution main pipe supporting framework is increased, the practical function is not increased, and the steam distribution main pipe is not applied in engineering practice.
CN202770294U, a novel air cooling single bank tube bank, the focus is the width of parent tube to the structure, through the chamfer, have benefits such as being convenient for wash, trompil on the fin increases the stream, improves the heat transfer effect, and this kind of improvement hopes to promote original performance, can not change original dependence huge steel platform and large-scale axial fan and the using-way that A shape slope was arranged.
CN204142704U, air cooling condenser list calandria, the main improvement is that increase the spiral support at the single calandria inside wall to increase the rigidity of single calandria long side face, increase the exhaust steam disturbance during operation, improve heat transfer performance, still can not change original dependence huge steel platform and large-scale axial fan and the use mode that A shape inclined layout.
CN202485522U, the parent tube adopts wedge structure to reduce air resistance, does not have the function that the increase circulation cross section that the invention needs, reduces exhaust steam resistance, vertical arrangement uses.
CN 110849195A, an air cooling condenser finned tube, mainly set up at least one inner groovy respectively in the both sides that the base tube cross section long side is located, the rigidity of the enhancement base tube reduces the material cost, do not have the function that the invention needs to increase the flow cross section, reduce the exhaust steam resistance, arrange the use vertically.
CN209054968U, natural draft air cooling system of power plant increases the air cooling heat exchanger through increasing the circumference of arranging of air cooling heat exchanger and arranges the quantity to reduce the vertical height of air cooling heat exchanger, reach the water resistance that reduces air cooling heat exchanger self, reduce circulating water pump's power and power consumption's purpose, the circumference is arranged to the radiator increases by a wide margin, has undoubtedly increased again and had occupied area very big, the investment of the very big indirect air cooling island of investment originally.
Disclosure of Invention
The invention aims to develop an air-cooling condensing single-row pipe which can be cooled and condensed in the flowing from bottom to top in a pipe with the steam exhaust entering and exiting from the bottom under the vertical or vertical arrangement state, has good condensing heat transfer film coefficient and low steam exhaust resistance, and has the function of a steam exhaust channel.
The large-section air-cooling condensing single-row pipe is characterized in that the cross-sectional area of the base pipe of the large-section air-cooling condensing single-row pipe is 38-138 square centimeters, which is 4-104 square centimeters larger than the cross-sectional area of the base pipe 34 square centimeters of the current universal single-row pipe with the specification of 219 x 19 x 1.5, the length of the inner section of the base pipe of the large-section air-cooling condensing single-row pipe is L-2t, and the width of the inner section of the base pipe of the large-section air-cooling condensing single-row pipe is W-2t, and the ratio of the length to the width of the inner section of the base pipe of the large-section air-cooling condensing single-row pipe is 12.3-4.54; a liquid flow channel (YLTD) is arranged between the two arc-shaped end surfaces (3) in the large-section air-cooling condensing single-row pipe and the partition screen (1), and the sectional area of the liquid flow channel (YLTD) accounts for 1-2% of the large-section air-cooling condensing single-row pipe; condensed water inlets (R) are arranged on two sides of the partition (1) so that the condensed water can flow into the liquid flow channel (YLTD); the partition screen (1) is fixed on the two arc-shaped end faces (3) through the elasticity of the coiled steel wire (2), the steel wire (2) is in close contact with the condensation surface (4) through the elasticity of the steel wire, the partition screen (1) controls and fixes the distance between the steel wire (2) and the partition screen (1), and the steel wire (2) and the partition screen (1) are connected by welding, bonding or strip locking connection.
The ratio of the total heat dissipation area of the large-section air-cooling condensing single-row pipe to the outer surface area of the base pipe is 13-25, and the fins are made of aluminum alloy.
The arc of the arc end surface (3) of the large-section air-cooling condensed steam single-row pipe base pipe is in the shape of an equal-diameter arc, a non-equal-diameter arc or a straight-edge chamfer.
The width (k) of a partition screen (1) in the large-section air-cooling condensed steam single-row pipe base pipe is 0.6 to 0.85 times of the width (W) of the base pipe, the partition screen is arc-shaped in the width (k) direction, see the attached drawings 10 and 11, so that the partition screen can be fixed in the base pipe by using the elasticity of the partition screen, and the partition screen is made of a metal material or a non-metal material; the steel wire (2) is stainless steel or carbon material steel.
The fixing mode of the partition screen (1) in the large-section air-cooling condensed steam single-row pipe base pipe is that after the base pipe inner wall is punched with a groove, or punched with an edge, or welded and fixed, the partition screen can be fixed without a steel wire (2).
The sectional area of a liquid flow channel (YLTD) in a large-section air-cooling condensed steam single-row pipe base pipe is large at the lower end and small at the upper end, so that condensed water from top to bottom has a corresponding flow sectional area; the liquid flow channel (YLTD) and the partition screen (1) can be arranged at one side in the large-section air-cooling condensed-steam single-row pipe base pipe; the outlet of the liquid flow channel (YLTD) is provided with a flow directing member (YLGJ) to direct the condensed water to the rim area.
The large-section air-cooling condensing single-row pipe can be vertically, vertically and randomly arranged, and when the condensing surface (4) is parallel or basically parallel to the gravity, the partition screen (1) can be eliminated.
The large-section air-cooling condensing single-row pipes are arranged according to requirements, and the flow directions of the exhaust steam and the condensed water can be cocurrent or countercurrent;
the large-section air-cooling and condensing single-row pipes with the same or different section areas can be connected in series to form a single-row pipe with longer length and the same or different sections.
The following positive effects can be obtained by adopting the invention:
the large-section air-cooling condensing single exhaust pipe is realized by increasing the size of the section mainly in the width (W) direction, and the length-width ratio of the section is reduced, so that the rigidity of the large-section air-cooling condensing single exhaust pipe is effectively enhanced; after the large-section air-cooling condensed steam single-row pipe is formed into a pipe bundle, the mechanical strength is higher.
When the traditional vertical arrangement mode of the condensing surface (4) is adopted in the large-section air-cooling condensing single-row pipe, 50% of steam distribution pipelines can be reduced;
because the condensed water flow channel (YLTD) is added in the large-section air-cooling condensed steam single discharge pipe, the flow speed range of the exhaust steam in the large-section air-cooling condensed steam single discharge pipe can be greatly expanded compared with the flow speed range without the condensed water flow channel (YLTD), and the reynolds number of the turbulent flow can be 102To 105Within the scope and designed arbitrarily as required.
By large cross-section air cooling single bank of tubes of condensing because the cross-section increase has effectively increased the logical vapour function of low resistance for adopt the natural draft or the direct air cooling of mixed draft of dryer bleed:
firstly, the air cooling tube bundle can be upwards arranged in multiple layers in the vertical direction;
the diameter of the air cooling island is greatly reduced, the occupied area is reduced,
the interference of environmental conditions on the performance of air condensing steam is reduced;
fourthly, the length of the steam exhaust ring pipe is reduced, the resistance of the steam exhaust is reduced, and the steam exhaust pressure of the steam turbine is reduced;
the number of steam exhaust circular pipes and steam distribution pipelines is greatly reduced, and a large amount of steel is saved;
and sixthly, because the occupied area and the pipeline material are reduced, a key condition is created for sharing one air cooling tower by the dead steam of two turbines and one tower.
Drawings
Fig. 1 is a view showing the windward direction or the wind outlet direction of a single-row pipe with the current general 219 × 19 × 1.5 standard for direct air cooling;
FIG. 2 is a view showing the current 219X 19X 1.5 standard single row pipes for direct air cooling in the forward or reverse direction;
FIG. 3 shows the cross-sectional dimensions and views of a 219X 19X 1.5 standard single row tube for direct air cooling;
in the figure:
t is 1.5mm, namely the wall thickness of the single-row tube is 1.5 mm;
FIG. 4 is a cross-sectional view of a large-section single air-cooling condensing pipe according to the present invention, wherein the arrow direction is the exhaust steam flow direction;
in the figure:
1, a screen for separating a liquid flow channel (YLTD) and a steam exhaust channel (FQTD), wherein openings are arranged at two sides of the screen so that condensed water flows into the condensed water channel through the screen;
2, steel wires for supporting the screen (1);
3, an arc end face; a closed space is formed with the condensing surface (4) to provide necessary conditions for the condensation of the exhaust steam and the outflow of condensed water;
4, a condensation surface, a plane used for exhaust steam cooling condensation in the single-row pipe;
YLTD, flow channel;
FQTD, exhaust steam channel;
FIG. 5 is a schematic diagram showing a cross-sectional partial enlargement of the relationship between the screen (1) and the arc-shaped end face (2) of the steel wire (2), the liquid flow channel (YLTD) and the exhaust steam channel (FQTD) in a large-section air-cooling condensing single-row pipe;
FIG. 6 is a schematic view of a sectional structure of a vertical surface showing the relationship between the installation mode of the screen (1) in the large-section air-cooled condensed steam single exhaust pipe and the flow direction of the exhaust steam indicated by an arrow, reflecting the installation mode of the screen (1) in the orifice-to-flow channel (YLTD);
FIG. 7 is a schematic cross-sectional structural diagram of a large-section air-cooling condensed steam single-row pipe with a cross section of 114 square centimeters and two arc-shaped end surfaces provided with liquid flow channels (YLTD);
FIG. 8 is a simplified diagram of a screen with condensate inlets on both sides of the screen (1);
in the figure:
r, a condensed water inlet;
k is the width of the screen (1);
FIG. 9 is a schematic view of a side punch structure of a screen;
in the figure:
r, a condensed water inlet;
FIG. 10 is a schematic cross-sectional view of a screen of a washout opening towards a steam exhaust channel (FQTD), and the installation mode in a large-section air-cooling condensed steam single-row pipe is shown in FIG. 4;
FIG. 11 is a schematic cross-sectional view of a screen of a nozzle to flow channel (YLTD) installed in a large-section air-cooled condensed steam single-row pipe as shown in FIG. 6;
FIG. 12 is a schematic view showing the manner of mounting the flow member (YLGJ) at the outlet of the flow channel;
in the figure:
GB, tube sheet;
FIG. 13 is a front elevation view of a natural draft direct air cooling island constructed with the existing universal single row of tubes;
FIG. 14 is a plan layout view of a natural draft direct air cooling island composed of the existing general single row tubes; the device occupies 75965 square meters;
FIG. 15 is a front elevation view of a natural draft direct air cooling island composed of single row of large-section air-cooled condenser tubes according to the present invention;
FIG. 16 is a plan view of a natural ventilation direct air cooling island composed of large-section air-cooling condensed steam single-row pipes according to the present invention; the device occupies 24053 square meters;
FIG. 17 is a schematic diagram showing the cross-sectional parameter expression of a large-section air-cooled condensed steam single-row pipe base pipe;
in the figure:
l, the section of the base tube of the large-section air-cooling condensing single-exhaust tube comprises the length of the wall thickness (t);
w, the width of the base tube section of the large-section air-cooling condensing single-row tube containing the wall thickness (t)
And T, the pipe wall thickness of the cross section of the base pipe of the large-section air-cooling condensing single-row pipe.
Detailed Description
Condensing the exhaust steam by adopting a natural ventilation direct air cooling mode with the exhaust steam of 2 x 1065 tons per hour, wherein the cooling air volume is 71000kg per second, and the air density is 0.98kg/m at the atmospheric pressure of 90kPa and the air temperature of 50 DEG C3The volume of 71000kg of hot air is: 72450m3Taking the maximum flow velocity of air at the outlet of the air duct as 6.1m/s, and taking the diameter of the outlet of the air duct as 123 m; heat radiation area 320 x 102The density of the exhaust steam is 0.05kg, the flow of the exhaust steam per second is 11833m3And/s, taking the flow speed of the dead steam entering the single-row pipe, wherein the flow speed is 100m/s, and the total sectional area of the steam entering the single-row pipe is as follows: 118.33m2The current general 219 × 19 × 1.5 single-row pipe with the cross-sectional area of 34 square centimeters is adopted, and the required number of the single-row pipes is as follows: 34803, total times of the windward side with width of 5.6m is 354, that is, the number of the condensing triangles is 177, the total width of the air intake side of the 60-degree equilateral triangle is 5.6 × 177 to 991.2, that is, the diameter of the air cooling island is 315.6 m, and the occupied area is 78228m2See fig. 13 and 14.
The cross section area in the pipe of the 247 multiplied by 47 multiplied by 1.5 large-section air-cooling condensing single-row pipe is 103.2 square centimeters, and the required number of the large-section air-cooling condensing single-row pipes is as follows: 11466, the total number of required windward times of 5.6m is 174, namely the number of the condensation triangles is 87, the air inlet width of the 60-degree equilateral triangle is 5.6 multiplied by 87 which is 487.2, namely the diameter of the air cooling island is 155.2 meters, and the occupied land is 18918m2The occupied area is reduced by 59310m and is only 24.2 percent of the current general single-row pipe2(ii) a Meanwhile, the steel material with 500 meters and thousands tons in the large-diameter steam exhaust pipeline is greatly reduced, and the attached drawings 15 and 16 show that.
Only with land occupation reduction of 59310m2The meter is characterized in that: land leveling cost, concrete cost, air cooling radiator and air ductThe cost of the color steel plate and the construction and the labor cost are at least 200 yuan per square meter, and the investment of 1186 ten thousand yuan can be saved only by reducing the occupied land.
Due to the increase of the section of the single pipe, under the condition of the same inlet flow velocity, the resistance drop of the 10-meter large-section air-cooling and condensing single-row pipe is only 43 percent of that of the universal single-row pipe, and the important condition is created for multistage series condensation of the exhaust steam.
The foregoing is a detailed description of the invention and no limitation to the specific embodiments thereof is intended, as one skilled in the art will readily appreciate that many modifications and variations are possible without departing from the inventive concepts herein.
Claims (9)
1. The large-section air-cooling condensing single-row pipe is characterized in that the cross-sectional area of the base pipe of the large-section air-cooling condensing single-row pipe is 38-138 square centimeters, is 34 square centimeters and 4-104 square centimeters larger than the cross-sectional area of the base pipe of the current universal single-row pipe with the specification of 219 x 19 x 1.5, the length of the inner cross section of the base pipe of the large-section air-cooling condensing single-row pipe is L-2t, the width of the inner cross section of the base pipe of the large-section air-cooling condensing single-row pipe is W-2t, and the ratio of the length to the width of the inner cross section of the base pipe of the large-section air-cooling condensing single-row pipe is 12.3-4.54; a liquid flow channel (YLTD) is arranged between the two arc-shaped end surfaces (3) in the large-section air-cooling condensing single-row pipe and the partition screen (1), and the sectional area of the liquid flow channel (YLTD) accounts for 1-2% of the large-section air-cooling condensing single-row pipe; condensed water inlets (R) are arranged on two sides of the partition (1) so that the condensed water can flow into the liquid flow channel (YLTD); the partition screen (1) is fixed on the two arc-shaped end faces (3) through the elasticity of the coiled steel wire (2), the steel wire (2) is in close contact with the condensation surface (4) through the elasticity of the steel wire, the partition screen (1) controls and fixes the distance between the steel wire (2) and the partition screen (1), and the steel wire (2) and the partition screen (1) are connected by welding, bonding or strip locking connection.
2. The large-section air-cooling condensing single-row pipe of claim 1, characterized in that the width (k) of the screen (1) in the base pipe of the large-section air-cooling condensing single-row pipe is 0.6 to 0.85 times of the width (W) of the base pipe, and the screen is arc-shaped in the width (k) direction so as to be fixed in the base pipe by the elasticity thereof, and the screen is made of metal material or non-metal material; the steel wire (2) is stainless steel or carbon material steel.
3. The large-section air-cooling condenser single exhaust pipe according to claim 1, wherein the arc shape of the arc end surface (3) of the base pipe of the large-section air-cooling condenser single exhaust pipe is an equal-diameter arc, a non-equal-diameter arc or a straight-edge chamfered shape.
4. The large-section air-condensing single-row pipe according to claim 1, wherein the ratio of the total heat dissipation area of the large-section air-condensing single-row pipe to the outer surface area of the base pipe is 13 to 25, and the fin is made of aluminum alloy.
5. The large-section air-cooling condenser single-row pipe according to claim 1, characterized in that the partition (1) in the base pipe of the large-section air-cooling condenser single-row pipe is fixed by punching a groove or a punched edge on the inner wall of the base pipe or by welding, and is not fixed by the steel wire (2).
6. The large-section air-condensed single row pipe of claim 1, wherein the liquid flow channel (YLTD) has a larger cross-sectional area at the lower end and a smaller cross-sectional area at the upper end in the base pipe of the large-section air-condensed single row pipe, so that the condensed water from the top to the bottom has a corresponding cross-sectional flow area; the outlet of the liquid flow channel (YLTD) is provided with a flow directing member (YLGJ) to direct the condensed water to the rim area.
7. The large-section air-cooling condensing single-row pipe according to the claim 1, characterized in that the large-section air-cooling condensing single-row pipe can be vertically, vertically and randomly arranged, and when the condensing surface (4) is arranged in parallel or basically in parallel with the gravity, the partition (1) is eliminated; the large-section air-cooling condensing single-row pipes are arranged according to requirements, and the flow directions of the exhaust steam and the condensed water can be cocurrent or countercurrent.
8. The large-section air-cooling condensing single-row pipe according to claim 1, wherein the large-section air-cooling condensing single-row pipes with the same or different section areas can be connected in series to form a single-row pipe with longer length and the same or different section areas.
9. The large-area air-condensing single-row pipe of claim 1, characterized in that the liquid flow channel (YLTD) and the screen (1) are arranged on one side in the base pipe of the large-area air-condensing single-row pipe.
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| CN202010708736.XA CN113970253A (en) | 2020-07-22 | 2020-07-22 | Large-section air-cooling condensing single-row pipe |
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| CN202010708736.XA CN113970253A (en) | 2020-07-22 | 2020-07-22 | Large-section air-cooling condensing single-row pipe |
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| CN110849195A (en) * | 2019-11-21 | 2020-02-28 | 双良节能系统股份有限公司 | Finned tube of air-cooling condenser |
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