CN202074845U - Evaporative condenser radiating module for steam exhaust of steam turbine - Google Patents
Evaporative condenser radiating module for steam exhaust of steam turbine Download PDFInfo
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- CN202074845U CN202074845U CN2011201339950U CN201120133995U CN202074845U CN 202074845 U CN202074845 U CN 202074845U CN 2011201339950 U CN2011201339950 U CN 2011201339950U CN 201120133995 U CN201120133995 U CN 201120133995U CN 202074845 U CN202074845 U CN 202074845U
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Abstract
The utility model discloses an evaporative condenser radiating module for steam exhaust of a steam turbine, which solves the problems that existing equipment is large-scale and a system is large in floor area. The evaporative condenser radiating module comprises tube bundles and steam-water separating chambers, a counter flow cooling tube bundle C (8) is communicated between a central steam-water separating chamber (7) and an upper sealed space (10) of a steam-water separating chamber (4) between a section A and a section B, a down flow cooling tube bundle B (5) is comminuted between the central steam-water separating chamber (7) and a lower sealed space of the steam-water separating chamber (4) between the section A and the section B, a sealed steam entering chamber A (2) is arranged on the left of the steam-water separating chamber (4) between the section A and the section B, a down flow cooling tube bundle A (3) is arranged between the steam entering chamber A (2) and the lower sealed space of the steam-water separating chamber (4) between the section A and the section B, and the tube bundles and the steam-water separating chambers arranged on the right of the central steam-water separating chamber (7) are totally identical with those arranged on the left of the central steam-water separating chamber (7) in structure. The safety and the economy of a unit are remarkably improved by the aid of the evaporative condenser radiating module.
Description
Technical field
Invention relates to a kind of condenser, and particularly a kind of steam to steam turbine discharge in parallel with the air cooling island carries out the heat radiation module in the condenser of evaporating type condensing.
Background technology
Direct Air-cooled Unit is the cooling medium of discharging gas with air as steam turbine, light because of the density of air, specific heat capacity is little, heat transfer coefficient is low, therefore the design temperature rise of air cooling system air side is far above humid-cool system, the design back pressure of unit also is higher than clammy unit far away, and the unit operation heat-economy is brought very big influence.Go back the following problem of ubiquity in the Air-cooled Unit actual motion: the unit operation back pressure is raise, influence its economy; Simultaneously, unit operation back pressure vary within wide limits makes the unit operation security reliability poor; In addition, the unit operation back pressure is subjected to the influence of environmental key-element big, and unit is in the high period of environment temperature, and existence is outstanding because of the high limited load problem of back pressure.At the problems referred to above, generally adopt the auxiliary wet type cooling system mode that increases in the industry, as adopt spray cooling system, water tower condenser humid-cool system in parallel, cascade evaporation formula condenser system, to strengthen the exchange capability of heat of air cooling system, satisfy the requirement of unit safety economical operation.Evaporative condenser is a kind of novel cooling device, and is comparatively extensive in refrigeration and chemical industry application, uses to some extent on small-sized unit as the condensing plant of turbine low pressure cylinder steam discharge at electric power station system, and the application on large-scale unit also belongs to the development phase.Be applied to the evaporative condenser of power station condensing system and the very big difference of technical characterstic existence that refrigeration system adopts evaporative condenser.In system and structural design, need emphasis problem aspect several below considering.Direct air cooling system spike evaporative condenser in parallel is used to cool off the part steam discharge of steam turbine, because cooling heat is big, equipment scale is big, and system's floor space is big, the ventilation that needs is highly high, adopts the all-in-one-piece evaporative condenser combination of tens of moulding not to be suitable for large-scale unit.Snake type coil pipe is adopted in the tube bank design that is applied to refrigeration system usually, because on-way resistance is big, incompatibility is used for the cooling of the big turbine discharge of specific volume.Use the evaporative condenser of power station condensing system and must manage to reduce SR,, improve the economy of unit operation to reduce the unit operation back pressure.Direct air cooling system spike evaporative condenser in parallel, because system is in negative pressure state in the pipe, there is blank phenomenon inevitably in turbine vacuum system.
Summary of the invention
It is big that the evaporative condenser heat radiation module that a kind of turbine discharge provided by the invention is used has solved the existing equipment system scale, and the tube bank big and refrigeration system of system's floor space adopts snake type coil pipe to make on-way resistance be not suitable for the big cooling problem of turbine discharge specific volume greatly.
The present invention solves above technical problem by the following technical programs:
The evaporative condenser heat radiation module that a kind of turbine discharge is used, comprise tube bank and steam-water separation chamber, steam-water separation chamber is provided with the steel bracing frame, the left side of the central steam-water separation chamber of sealing is provided with A, the intersegmental steam-water separation chamber of B, at A, be provided with demarcation strip in the intersegmental steam-water separation chamber of B, demarcation strip is with A, the intersegmental steam-water separation chamber of B is separated into top enclosure space and bottom enclosure space, at A, be communicated with the tube bank of C section counterflow cooling section between the top enclosure space of the intersegmental steam-water separation chamber of B and the central steam-water separation chamber, at A, be communicated with the tube bank of B section following current cooling section between the bottom enclosure space of the intersegmental steam-water separation chamber of B and the central steam-water separation chamber, tube bank be arranged in parallel and becomes 20 to spend inclinations angle with horizontal plane the tube bank of C section counterflow cooling section mutually with B section following current cooling section, at A, the top enclosure space of the intersegmental steam-water separation chamber of B is provided with the exhaust pipeline, be provided with the condensation water drainage pipe in the bottom of central steam-water separation chamber, at A, the left side of the intersegmental steam-water separation chamber of B is provided with the A section steam inlet chamber of sealing, at A section steam inlet chamber and A, be provided with the tube bank of A section following current cooling section between the bottom enclosure space of the intersegmental steam-water separation chamber of B, the tube bank of A section following current cooling section be arranged in parallel each other and becomes 20 degree inclinations angle with horizontal plane, and the left surface of A section steam inlet chamber is provided with the steam admission left side mouth of pipe; Be provided with and its left side identical in structure tube bank and steam-water separation chamber on the right side of central steam-water separation chamber, whole evaporative condenser heat radiation module is in the shape of the letter V and is symmetrical arranged.
The length of described C section counterflow cooling section tube bank, the tube bank of B section following current cooling section and the tube bank of A section following current cooling section is 2 ~ 2.5 meters.
The caliber that the caliber of A section following current cooling section tube bank and C section counterflow cooling section are restrained is identical and wall thickness pipe is also identical; The caliber of B section following current cooling section tube bank is 80/100 with the ratio of the caliber of A section following current cooling section tube bank, and the wall thickness of the pipe of B section following current cooling section tube bank is 2/3 with the ratio of the wall thickness of the pipe of A section following current cooling section tube bank.
Described C section counterflow cooling section tube bank, the tube bank of B section following current cooling section and the tube bank of the A section following current cooling section tube bank arrangement on the tangent plane vertical with tube bank separately is the wrong row of 30 degree triangles pattern.
The present invention can significantly improve the safety economy of unit, parallel spike evaporative condenser is directly shunted a certain proportion of turbine low pressure cylinder steam discharge, with its tangible advantage of series system comparison be the resistance that can reduce system, the steam inlet condition of air cooling system and evaporative condenser is identical, and exchange capability of heat strengthens.After compiling, evaporative condenser condensation water drainage and air cooling system condensation water drainage enter condensate system.
Description of drawings
Fig. 1 is the structural representation of evaporative condenser heat radiation module of the present invention
Fig. 2 is that I-I among Fig. 1 is to cutaway view
Fig. 3 is that H-H among Fig. 1 is to cutaway view.
The specific embodiment
A kind of parallel spike evaporative condenser, comprise turbine low pressure cylinder 14, air cooling island 16, be communicated with cooling unit 17 on the exhaust equipment of LP casing 15 that is communicated with between turbine low pressure cylinder 14 and the air cooling island 16, the output of cooling unit 17 is connected together through condensate tank 18 and condensate pump 19; Cooling unit 17 comprises tube bank and steam-water separation chamber, steam-water separation chamber is provided with steel bracing frame 13, the left side of the central steam-water separation chamber 7 of sealing is provided with A, the intersegmental steam-water separation chamber 4 of B, at A, be provided with demarcation strip 9 in the intersegmental steam-water separation chamber 4 of B, demarcation strip 9 is with A, the intersegmental steam-water separation chamber 4 of B is separated into top enclosure space 10 and bottom enclosure space, at A, be communicated with C section counterflow cooling section tube bank 8 between the top enclosure space 10 of the intersegmental steam-water separation chamber 4 of B and the central steam-water separation chamber 7, at A, be communicated with B section following current cooling section tube bank 5 between the bottom enclosure space of the intersegmental steam-water separation chamber 4 of B and the central steam-water separation chamber 7, the tube bank 8 of C section counterflow cooling section be arranged in parallel mutually with B section following current cooling section tube bank 5 and becomes 20 to spend inclinations angle with horizontal plane, at A, the top enclosure space 10 of the intersegmental steam-water separation chamber 4 of B is provided with exhaust pipeline 11, be provided with condensation water drainage pipe 12 in the bottom of central steam-water separation chamber 7, at A, the left side of the intersegmental steam-water separation chamber 4 of B is provided with the A section steam inlet chamber 2 of sealing, at A section steam inlet chamber 2 and A, be provided with A section following current cooling section tube bank 3 between the bottom enclosure space of the intersegmental steam-water separation chamber 4 of B, A section following current cooling section tube bank 3 be arranged in parallel each other and becomes 20 degree inclinations angle with horizontal plane, and the left surface of A section steam inlet chamber 2 is provided with the steam admission left side mouth of pipe 1; Be provided with and its left side identical in structure tube bank and steam-water separation chamber on the right side of central steam-water separation chamber 7, whole evaporative condenser heat radiation module is in the shape of the letter V and is symmetrical arranged.
The length of described C section counterflow cooling section tube bank 8, the tube bank 5 of B section following current cooling section and A section following current cooling section tube bank 3 is 2 ~ 2.5 meters.
It is identical and wall thickness pipe is also identical that the caliber of A section following current cooling section tube bank 3 and C section counterflow cooling section are restrained 8 caliber; The caliber of B section following current cooling section tube bank 5 is 80/100 with the ratio of the caliber of A section following current cooling section tube bank 3, and the wall thickness of the pipe of B section following current cooling section tube bank 5 is 2/3 with the ratio of the wall thickness of the pipe of A section following current cooling section tube bank 3.
Described C section counterflow cooling section tube bank 8, the tube bank 5 of B section following current cooling section and the A section following current cooling section tube bank 3 tube bank arrangement on the tangent plane vertical with tube bank separately is the wrong row of 30 degree triangles pattern.
The heat radiation module of cooling unit adopts two admission of surveying, and can reduce to manage the inside admission flow, helps reducing SR, reduces Guan Jing, increases the coefficient of heat transfer, reduces unit size and uses the material amount.
Since the flow resistance of steam approximate with square being directly proportional of flow velocity, the bilateral admission is adopted in the admission of heat radiation module, and flow can be reduced to 50% of one-sided admission, for satisfying SR control requirement, consider the factor that flow path resistance reduces simultaneously, through reducing 40%, under same film-cooled heat, material can reduce 70% in the tube bank of bilateral admission, and adopt tubule through after, condensation heat transfer coefficient strengthens, and the thin thermal conduction resistance of tube wall reduces, and heat exchange area also can further reduce.
Fully the heat spreader structures pattern is combined in each stage condensation characteristic with the gas that is cooled, further improve the tube bank design and make radiator have high-performance.
On the basis of bilateral admission, the further optimization that the flow process of individual steam admission side tube bank is carried out.Each steam admission side is divided into three flow processs, and all admission enters following current A section, and after about 50% steam condensed, condensate water was directly discharged, and can effectively control, the thickness of liquid film of following flow process tube bank; The steam that following current A section is not condensed enters following current B section, continues to condense, and remaining 15% steam that does not condense enters adverse current C section and condenses, and discharge on incondensable gas top.Adopt thin tubule bundle in following current B section, play the effect that increases heat exchange area, the enhancing coefficient of heat transfer, reduces material usage; The tube bank of adverse current C section and following current A section is identical, can reach to reduce flow velocity, reduce resistance, reduced coldly, is convenient to the emptying purpose.
The requirement of structural strength and rigidity is considered in the heat spreader structures design simultaneously, and by rational design, playing increases system strength, rigidity, the purpose of being convenient to install.
A module is divided into four sections, and five headers have increased the rigidity of restraining, and more cooling section has increased thick thick tube bank, and integral body has improved system stiffness; Five headers can be used as the supporting surface of module, increase the strength and stiffness and the stability of support system.
Adopt Tinkertoy approach modularization, blocking design concept, make that product processing technique is simple, convenient transportation, quick for installation, system's investment cost reduce.
A cooling unit is made up of 8-10 module, is equipped with a typhoon machine; Some cooling units are formed a system, make that product processing technique is simple, convenient transportation, quick for installation.The system support system, vent passages, cooling water system, the unified design of water charging system can be simplified system configuration, reduce investment cost, are convenient to the whole water yield and regulate, and guarantee water quality index, reduce the operation maintenance amount.
Claims (4)
1. the evaporative condenser heat radiation module used of a turbine discharge, comprise tube bank and steam-water separation chamber, it is characterized in that, the left side of the central steam-water separation chamber (7) of sealing is provided with A, the intersegmental steam-water separation chamber of B (4), at A, be provided with demarcation strip (9) in the intersegmental steam-water separation chamber of B (4), demarcation strip (9) is with A, the intersegmental steam-water separation chamber of B (4) is separated into top enclosure space (10) and bottom enclosure space, at A, be communicated with C section counterflow cooling section tube bank (8) between the top enclosure space (10) of the intersegmental steam-water separation chamber of B (4) and the central steam-water separation chamber (7), at A, be communicated with B section following current cooling section tube bank (5) between the bottom enclosure space of the intersegmental steam-water separation chamber of B (4) and the central steam-water separation chamber (7), C section counterflow cooling section tube bank (8) be arranged in parallel mutually with B section following current cooling section tube bank (5) and becomes 20 to spend inclinations angle with horizontal plane, at A, the top enclosure space (10) of the intersegmental steam-water separation chamber of B (4) is provided with exhaust pipeline (11), be provided with condensation water drainage pipe (12) in the bottom of central steam-water separation chamber (7), at A, the left side of the intersegmental steam-water separation chamber of B (4) is provided with the A section steam inlet chamber (2) of sealing, at A section steam inlet chamber (2) and A, be provided with A section following current cooling section tube bank (3) between the bottom enclosure space of the intersegmental steam-water separation chamber of B (4), A section following current cooling section tube bank (3) be arranged in parallel each other and becomes 20 degree inclinations angle with horizontal plane, and the left surface of A section steam inlet chamber (2) is provided with the steam admission left side mouth of pipe (1); Be provided with and its left side identical in structure tube bank and steam-water separation chamber on the right side of central steam-water separation chamber (7), whole evaporative condenser heat radiation module is in the shape of the letter V and is symmetrical arranged.
2. the evaporative condenser heat radiation module that a kind of turbine discharge according to claim 1 is used, it is characterized in that: the length of described C section counterflow cooling section tube bank (8), B section following current cooling section tube bank (5) and A section following current cooling section tube bank (3) is 2-2.5 rice.
3. evaporative condenser that a kind of turbine discharge according to claim 1 and 2 is used heat radiation module is characterized in that: it is identical and wall thickness pipe is also identical that the caliber of A section following current cooling section tube bank (3) and C section counterflow cooling section are restrained the caliber of (8); The ratio of the caliber of the caliber of B section following current cooling section tube bank (5) and A section following current cooling section tube bank (3) is 80/100, and the ratio of the wall thickness of the pipe of the wall thickness of the pipe of B section following current cooling section tube bank (5) and A section following current cooling section tube bank (3) is 2/3.
4. the evaporative condenser heat radiation module that a kind of turbine discharge according to claim 1 and 2 is used is characterized in that: described C section counterflow cooling section tube bank (8), B section following current cooling section tube bank (5) and A section following current cooling section tube bank (3) the tube bank arrangement on the tangent plane vertical with tube bank separately is the wrong row of 30 degree triangles pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201339950U CN202074845U (en) | 2011-04-29 | 2011-04-29 | Evaporative condenser radiating module for steam exhaust of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201339950U CN202074845U (en) | 2011-04-29 | 2011-04-29 | Evaporative condenser radiating module for steam exhaust of steam turbine |
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| Publication Number | Publication Date |
|---|---|
| CN202074845U true CN202074845U (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201339950U Expired - Lifetime CN202074845U (en) | 2011-04-29 | 2011-04-29 | Evaporative condenser radiating module for steam exhaust of steam turbine |
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| CN (1) | CN202074845U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192660A (en) * | 2011-04-29 | 2011-09-21 | 山西省电力公司电力科学研究院 | Heat radiating module for evaporative condenser for steam exhaust purpose of steam turbine |
-
2011
- 2011-04-29 CN CN2011201339950U patent/CN202074845U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192660A (en) * | 2011-04-29 | 2011-09-21 | 山西省电力公司电力科学研究院 | Heat radiating module for evaporative condenser for steam exhaust purpose of steam turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111214 Effective date of abandoning: 20120822 |