CN220270123U - Air-cooling condenser - Google Patents

Abstract

The utility model relates to a condenser technical field especially relates to an air cooling condenser, including downstream unit, countercurrent unit, admission pipe and condenser pipe, downstream unit one end and admission pipe intercommunication, downstream unit other end and condenser pipe intercommunication, countercurrent unit setting are in downstream unit outside, countercurrent unit place is in the region, downstream unit is double-deck finned tube with countercurrent unit and arranges, countercurrent unit keeps away from the one end intercommunication of condenser pipe and has the exhaust tube. The heat exchange unit has the effect of reserving the function of the countercurrent unit while increasing the heat exchange area.

Description

Air-cooling condenser

Technical Field

The application relates to the technical field of condensers, in particular to an air-cooled condenser.

Background

At present, a condenser with a K/D structure is mainly adopted in direct air cooling, namely, a concurrent tube bundle (K) and a countercurrent tube bundle (D) are combined. In the fin tube, the flow direction of the steam is the same as the flow direction of the condensate (from top to bottom), which is called downstream. In the fin tube, the flow direction of the steam (bottom-up) is opposite to the flow direction of the condensate (top-down), which is called counter flow.

The air-cooled condenser is generally provided with six rows of cooling units, and five groups of cooling units are arranged in each row. Of the five groups, one or two are counter-current units, and the other four or three are forward-current units. Some of the vapor that is not condensed by cooling in the forward flow unit needs to be condensed continuously in the counter-flow cooling unit. The condensed water flows downwards along the finned tubes in the countercurrent unit due to the action of gravity, and the non-condensed gas flows upwards and is pumped out by the air extractor.

In order to increase the heat exchange capacity of the air-cooled condenser, the countercurrent unit is changed into the concurrent unit, so that the heat exchange area of the concurrent unit is increased, and the heat exchange capacity of the main cooling area is further increased. However, after the countercurrent unit is changed into the forward unit, the function of the air condenser for cooling the residual steam and the non-condensable gas is not present. Thus, the gas which is not completely cooled easily exists, and the cooling effect on the steam is reduced.

Disclosure of Invention

The purpose of this application is to provide an air cooling condenser, and it can remain countercurrent unit function when increasing heat transfer area.

The application provides an air-cooled condenser adopts following technical scheme:

the utility model provides an air cooling condenser, includes downstream unit, countercurrent unit, steam inlet pipe and condensate pipe, downstream unit one end with steam inlet pipe intercommunication, downstream unit other end with the condensate pipe intercommunication, countercurrent unit one end with the condensate pipe intercommunication, countercurrent unit sets up downstream unit outside, countercurrent unit is located in the region, downstream unit with countercurrent unit is double-deck finned tube and arranges, countercurrent unit is kept away from the one end intercommunication of condensate pipe has the exhaust tube.

Through adopting above-mentioned technical scheme, countercurrent unit sets up in the concurrent unit outside to under the unchangeable circumstances of admission pipe and condensate pipe length, increased concurrent unit's area, thereby increased the heat transfer area of steam, and then increased the heat exchange efficiency to steam, and through countercurrent unit's setting, realized the secondary condensation to residual steam, and can take out uncondensed gas.

Optionally, the countercurrent unit and the concurrent unit are arranged in parallel.

By adopting the technical scheme, the countercurrent unit and the downstream unit are arranged in parallel, so that the countercurrent unit can be contacted with the cooling air heated by the downstream unit, and the steam in the countercurrent unit is cooled without supercooling to freeze the countercurrent unit.

Optionally, the downstream unit includes a plurality of parallel downstream pipes, the countercurrent unit includes a plurality of parallel countercurrent pipes, there is a gap between adjacent downstream pipes, the gap includes a first gap and a second gap, and the countercurrent pipe is disposed in an interval where the second gap is located.

Through adopting above-mentioned technical scheme, through setting up the countercurrent tube in the interval that the second clearance was located to make cooling air can directly contact with countercurrent tube after passing through the second clearance, this mode cooling air is bigger with countercurrent tube contact's area, better to the steam cooling effect in the countercurrent tube.

Optionally, the first gap width is smaller than the second gap width.

Through adopting above-mentioned technical scheme, first clearance width is less than the second clearance width to the wind speed that passes the second clearance is greater than the wind speed that passes first clearance, and then better to the cooling effect of countercurrent tube, more convenient condensation to the steam in the countercurrent tube.

Optionally, the cooling device further comprises a cooling piece, wherein the cooling piece is arranged towards the downstream pipe and can blow cooling air to the downstream pipe.

Through adopting above-mentioned technical scheme, through the setting of cooling piece, blow cooling air to downstream pipe and countercurrent pipe to increased downstream pipe and countercurrent pipe's cooling effect, accelerated the cooling rate to steam.

Optionally, the downstream unit is located at a distance from the cooling element that is less than the distance from the counter-flow unit to the cooling element.

Through adopting above-mentioned technical scheme, through the position arrangement of forward flow unit and countercurrent unit, the cooling air is through forward flow unit earlier, then through countercurrent unit to the cooling air carries out the heat exchange in forward flow unit department earlier, and the temperature rises, when again passing countercurrent unit, then is difficult to cause countercurrent unit supercooling frost crack.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the countercurrent unit is arranged on the outer side of the concurrent unit, so that the area of the concurrent unit is increased under the condition that the lengths of the steam inlet pipe and the condensation water pipe are unchanged, the heat exchange area of steam is increased, the heat exchange efficiency of the steam is further increased, the secondary condensation of residual steam is realized through the arrangement of the countercurrent unit, and non-condensed gas can be extracted;

2. the counter flow pipe is arranged in the interval where the second gap is, so that the cooling air can directly contact the counter flow pipe after passing through the second gap, the area of the cooling air in the way of contacting the counter flow pipe is larger, and the steam cooling effect in the counter flow pipe is better;

3. through the arrangement of the downstream pipe and the upstream pipe, the cooling air passes through the downstream pipe and then the upstream pipe, so that the cooling air exchanges heat at the downstream pipe, the temperature rises, and the cooling air is not easy to cause supercooling and frost cracking of the upstream pipe when passing through the upstream pipe.

Drawings

Fig. 1 is a schematic diagram of an overall structure of an air-cooled condenser in an embodiment of the present application.

Fig. 2 is a side view of a hollow condensing vapor vessel in an embodiment of the present application.

Fig. 3 is a side view of a hollow condensing vapor vessel in accordance with other embodiments of the present application.

In the figure, 1, an air inlet pipe; 2. a downstream unit; 21. a downstream pipe; 3. a condensate pipe; 4. a collection pipe; 5. a counter-current unit; 51. a reverse flow tube; 6. a cooling member; 7. and (5) an exhaust pipe.

Detailed Description

The present application is described in further detail below with reference to fig. 1-2.

An air-cooled condenser, refer to fig. 1 and 2, include the steam inlet pipe 1, downstream unit 2, condensate pipe 3 and collecting pipe 4, condensate pipe 3 has two, in this embodiment, two condensate pipes 3 a steam inlet pipe 1 parallel arrangement each other. The concurrent unit 2 comprises a plurality of concurrent pipes 21 which are parallel to each other, the concurrent pipes 21 are divided into two groups, one group of concurrent pipes 21 is arranged between the steam inlet pipe 1 and one condensate pipe 3, the other group of concurrent pipes 21 is arranged between the steam inlet pipe 1 and the other condensate pipe 3, and the concurrent pipes 21 of the same group are parallel to each other and are arranged at intervals. The two groups of concurrent pipes 21, one steam inlet pipe 1 and two condensation water pipes 3 form a herringbone shape together, cooling pieces 6 are arranged between the two groups of concurrent pipes 21, the cooling pieces 6 in the embodiment adopt air cooling fans, and the cooling pieces 6 are arranged towards the two groups of concurrent pipes 21. One end of the downstream pipe 21 is communicated with the steam inlet pipe 1, the other end of the downstream pipe 21 is communicated with the condensate pipe 3, and a gap exists between adjacent downstream pipes 21. Both condensate pipes 3 are in communication with a collecting pipe 4.

Steam exhausted from the low-pressure cylinder of the steam turbine enters the steam inlet pipe 1, flows into the downstream pipe 21 communicated with the steam inlet pipe 1 through the steam inlet pipe 1, the cooling piece 6 blows cooling air to the downstream pipe 21, and the cooling air passes through a gap between adjacent downstream pipes 21 and exchanges heat with the downstream pipe 21, so that the steam in the downstream pipe 21 is condensed. The steam is condensed to form condensed water, and the condensed water flows into the condensed water pipe 3 along the down-flow pipe 21 under the action of gravity and flows into the collecting pipe 4 through the condensed water pipe 3, so that the condensed water is collected.

The air-cooled condenser further comprises a countercurrent unit 5, the countercurrent unit 5 is arranged in a region where the countercurrent unit 5 is located, the countercurrent unit 5 and the forward flow unit 2 are arranged in a double-layer finned tube mode, the countercurrent unit 5 comprises a plurality of countercurrent tubes 51 which are arranged in parallel, each countercurrent tube 51 is communicated with the corresponding countercurrent tube 3, the countercurrent tubes 51 on each condensation tube 3 are arranged in parallel, one end, away from the condensation tube 3, of each countercurrent tube 51 is upwards arranged and communicated with an exhaust tube 7, the exhaust tubes 7 suck the countercurrent tubes 51 through a water ring vacuum pump set, on one hand, the air-cooled condenser is guaranteed to have a certain vacuum degree, on the other hand, uncondensed steam and gas can be pumped to the countercurrent tubes 51, the uncondensed steam and the gas flow into the condensation tubes 3 from bottom to top through the countercurrent tubes 51, the steam is condensed into condensed water and then flows into the condensation tubes 3 downwards, and then flows into the collection tubes 4 to be collected. The vapor that has not condensed and the condensed gas are then pumped out by the water ring vacuum pump.

The gap comprises a first gap and second gaps, the width of the first gap is smaller than that of the second interval, each second gap is provided with one countercurrent pipe 51 in the interval, the countercurrent pipes 51 and the downstream pipes 21 are arranged in parallel in the embodiment, and the distance between the countercurrent pipes 51 and the cooling piece 6 is larger than that between the downstream pipes 21 and the cooling piece 6. Referring to fig. 3, in other embodiments, an included angle of 0 ° to 30 ° is formed between the reverse flow pipe 51 and the forward flow pipe 21.

The first gap width is smaller than the second gap width so that the wind speed through the second gap is greater than the wind speed through the first gap so that the cooling air can continue to cool the uncondensed vapor within the counter flow tube 51. The cooling air firstly exchanges heat with the steam in the forward flow pipe 21 through the forward flow pipe 21, so that the temperature of the cooling air is increased slightly, and when the cooling air exchanges heat with the reverse flow pipe 51 through the reverse flow pipe 51, the reverse flow pipe 51 is not easy to be supercooled and frozen.

The implementation principle of the embodiment of the application is as follows: steam enters from the steam inlet pipe 1 and flows into the forward flow pipe 21, the cooling piece 6 blows cooling air towards the forward flow pipe 21, so that the cooling air exchanges heat with the forward flow pipe 21, steam in the forward flow pipe 21 is condensed, condensate water and steam which is not cooled completely flow into the condensate pipe 3 along the forward flow pipe 21, the condensate water in the condensate pipe 3 flows into the collecting pipe 4 to be collected, the steam which is not cooled completely is pumped into the countercurrent pipe 51 by the water ring vacuum pump set to be cooled secondarily, the steam which is cooled completely is condensed, and gas which cannot be condensed is pumped out by the water ring vacuum pump set, so that the whole condensation process is completed.

The downstream pipe 21 and the upstream pipe 51 in this embodiment are both made of finned tubes, and the embodiments in this embodiment are all preferred embodiments in this application, and are not intended to limit the scope of protection of this application, in which like parts are denoted by like reference numerals. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides an air cooling condenser, includes downstream unit (2), countercurrent unit (5), admission pipe (1) and condenser pipe (3), downstream unit (2) one end with admission pipe (1) intercommunication, downstream unit (2) the other end with condenser pipe (3) intercommunication, countercurrent unit (5) one end with condenser pipe (3) intercommunication, a serial communication port, countercurrent unit (5) set up downstream unit (2) outside, countercurrent unit (5) are in the region, downstream unit (2) with countercurrent unit (5) are double-deck finned tube and arrange, countercurrent unit (5) are kept away from condenser pipe (3) one end intercommunication has exhaust tube (7).

2. An air-cooled condenser according to claim 1, characterized in that the counter-flow unit (5) and the forward-flow unit (2) are arranged parallel to each other.

3. An air-cooled condenser according to claim 1, characterized in that the downstream unit (2) comprises a plurality of parallel downstream pipes (21), the upstream unit (5) comprises a plurality of parallel upstream pipes (51), a gap is formed between adjacent downstream pipes (21), the gap comprises a first gap and a second gap, and the upstream pipes (51) are arranged in the interval where the second gap is located.

4. An air-cooled condenser according to claim 3, wherein the first gap width is smaller than the second gap width.

5. An air-cooled condenser according to claim 1, further comprising a cooling member (6), the cooling member (6) being arranged in a direction toward the downstream unit (2) and being capable of blowing cooling air toward the downstream unit (2).

6. An air-cooled condenser according to claim 5, characterized in that the downstream unit (2) is located at a smaller distance from the cooling element (6) than the upstream unit (5) is located at the cooling element (6).

7. An air-cooled condenser as claimed in claim 1, wherein an included angle of 0-30 ° is formed between the counter flow unit (5) and the downstream unit (2).

8. An air-cooled condenser according to claim 5, characterized in that the cooling element (6) is a fan.