CN202066389U - Parallel peak evaporative condenser - Google Patents
Parallel peak evaporative condenser Download PDFInfo
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- CN202066389U CN202066389U CN2011201339791U CN201120133979U CN202066389U CN 202066389 U CN202066389 U CN 202066389U CN 2011201339791 U CN2011201339791 U CN 2011201339791U CN 201120133979 U CN201120133979 U CN 201120133979U CN 202066389 U CN202066389 U CN 202066389U
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- 238000001816 cooling Methods 0.000 claims abstract description 94
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000000926 separation method Methods 0.000 claims abstract description 54
- 230000005494 condensation Effects 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- 238000013461 design Methods 0.000 description 8
- 238000010977 unit operation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000002146 bilateral effect Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 241000270295 Serpentes Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 210000005239 tubule Anatomy 0.000 description 2
- 206010009866 Cold sweat Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The utility model discloses a parallel peak evaporative condenser. The problem that the existing refrigerating system has low tube bundle on-way resistance and is unsuitable for cooling a steam turbine with high specific volume is solved. A low pressure cylinder steam discharge pipe (15) communicated between a steam turbine low pressure cylinder (14) and an air cooling island (16) is communicated with a cooling unit (17), a condensate tank (18) and a condensate pump (19); the cooling unit (17) comprises a tube bundle and a steam-water separation chamber; a C-section counter flow cooling segment tube bundle (8) is communicated between a closed space (10) at the upper part of an A-B section steam-water separation chamber (4) and a center steam-water separation chamber (7); a B-section forward flow cooling segment tube bundle (5) is communicated between a closed space at the lower part of the A-B section steam-water separation chamber (4) and the center steam-water separation chamber (7); and an A-section forward flow cooling segment tube bundle (3) is arranged between an A-section steam-water separation chamber (2) and the closed space at the lower part of the A-B section steam-water separation chamber (4). The safety economy of a unit is improved.
Description
Technical field
The present invention relates to a kind of condenser, particularly a kind of steam to steam turbine discharge in parallel with the air cooling island carries out the condenser of evaporating type condensing.
Background technology
Direct Air-cooled Unit is that to adopt air be the medium that gas that steam turbine is discharged cools off, 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, and 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, and incompatible cooling with 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 a kind of parallel spike evaporative condenser provided by the invention has solved the existing equipment 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 problem of the big steam turbine cooling of specific volume greatly.
The present invention solves above technical problem by the following technical programs:
A kind of parallel spike evaporative condenser comprises turbine low pressure cylinder, air cooling island, is communicated with cooling unit on the exhaust equipment of LP casing that is communicated with between turbine low pressure cylinder and the air cooling island, and the output of cooling unit is connected together through condensate tank and condensate pump; Cooling unit comprises 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 rice.
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
Fig. 4 is a structural representation of the present invention.
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 rice.
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 admission is surveyed and 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.
The present invention is in parallel with the air cooling island, when load is in spike, opens the steam that this device discharges steam turbine and carries out evaporating type condensing.
Claims (4)
1. parallel spike evaporative condenser, comprise turbine low pressure cylinder (14), air cooling island (16), it is characterized in that, 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 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, 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. a kind of parallel spike evaporative condenser according to claim 1 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. a kind of parallel spike evaporative condenser according to claim 1 and 2 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. a kind of parallel spike evaporative condenser according to claim 1 and 2 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 |
|---|---|---|---|
| CN2011201339791U CN202066389U (en) | 2011-04-29 | 2011-04-29 | Parallel peak evaporative condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201339791U CN202066389U (en) | 2011-04-29 | 2011-04-29 | Parallel peak evaporative condenser |
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| Publication Number | Publication Date |
|---|---|
| CN202066389U true CN202066389U (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201339791U Expired - Fee Related CN202066389U (en) | 2011-04-29 | 2011-04-29 | Parallel peak evaporative condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202066389U (en) |
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2011
- 2011-04-29 CN CN2011201339791U patent/CN202066389U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: ELECTRIC POWER SCIENCE INST., SHANXI PROV. POWER CO. Effective date: 20121011 Owner name: ELECTRIC POWER SCIENCE INST., SHANXI PROV. POWER C Effective date: 20121011 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 030001 TAIYUAN, SHAANXI PROVINCE TO: 100031 DONGCHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121011 Address after: 100031 West Chang'an Avenue, Beijing, No. 86 Patentee after: State Grid Corporation of China Patentee after: Electric Power Research Institute of Shanxi Electric Power Company Address before: 030001 Qingnian Road, Shanxi, No. 6, Patentee before: Electric Power Research Institute of Shanxi Electric Power Company |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20180429 |