CN102759280A - Chimney type air cooling system - Google Patents
Chimney type air cooling system Download PDFInfo
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- CN102759280A CN102759280A CN2012102689363A CN201210268936A CN102759280A CN 102759280 A CN102759280 A CN 102759280A CN 2012102689363 A CN2012102689363 A CN 2012102689363A CN 201210268936 A CN201210268936 A CN 201210268936A CN 102759280 A CN102759280 A CN 102759280A
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- 238000001816 cooling Methods 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000007921 spray Substances 0.000 claims abstract description 19
- 239000010410 layer Substances 0.000 claims description 10
- 239000011229 interlayer Substances 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 abstract description 16
- 230000008859 change Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract 1
- 230000008014 freezing Effects 0.000 description 6
- 238000007710 freezing Methods 0.000 description 6
- 206010009866 Cold sweat Diseases 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000002060 circadian Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to an air cooling technology, and discloses a chimney type air cooling system. The system comprises a chimney positioned on the ground, and a heat exchange chamber, a cooling water tank, an air storage box and an underground air inlet pipeline which are positioned under the ground, wherein the bottom of the chimney is connected with the top of an outer layer of the heat exchange chamber; the heat exchange chamber comprises a hollow cavity of an inner layer and an air cavity sandwiched between the inner layer and the outer layer; the top of the hollow cavity of the inner layer is provided with a hot water tank; a heat exchanger is arranged in the air cavity; a water inlet pipe of the heat exchanger is connected with the hot water tank; a water outlet pipe of the heat exchanger is connected with the cooling water tank; the lower part of the outer layer of the heat exchange chamber is provided with an air inlet; the underground air inlet pipeline is connected with an inlet of the air storage box; and an air outlet of the air storage box is connected with the air inlet of the heat exchange chamber. In the invention, the air cooling system part is arranged under the ground and has less influence on the environment, and the air intake amount, the spray water amount and the amount of hot water for exchanging heat with cold air can be regulated according to the temperature change of cooling water, thereby ensuring small temperature change of the cooling water, small change of vacuum degree, low impact on the unit and high generating efficiency, and avoiding the frost cracking of water pipes.
Description
Technical field
The present invention relates to air-cooled technology, be specifically related to a kind of funnel-shaped air cooling system.
Background technology
Water-cooled power plant unit generation efficient is higher; The steam-electric power efficient that gets into steam turbine can only reach more than 40%; The steam of still having an appointment more than 50% is discharged as exhaust steam, this heat is taken out of the direct contact heat-exchanging of water and air in cooling tower with a large amount of cooling waters; Water is cooled, and gets in the condenser again and absorbs heat.The tower that is cooled is extracted out and is discharged to aerial air moisture content height, and conventional water-cooled unit adopts cooling stack, and recirculated water loss (evaporation, wind and blowdown loss) accounts for 80% of power plant's water consumption.
China's industry ecumene is in south, and coal mainly originates in the north, delivers to south as generating electricity in the colliery through power transmission path on every side, not only practices thrift the huge expense of transportation, also reduces municipal pollution significantly.But the general lack of water in the north makes the water-cooled power plant can't use in many coals place of production, can only coal be transported to the many south of electricity consumption at a distance.
The Air-cooled Unit consume water is few, is the solution that solves the generating of rich coal water-deficient area, and clammy unit pressure at expulsion depends on the wet-bulb temperature of air, and the Air-cooled Unit pressure at expulsion depends on the dry-bulb temperature of air, Air-cooled Unit than clammy unit back pressure than high 2～3 times.
Summer, environment temperature was high more, and condensate temperature is high more, and the unit back pressure is high more, and exhaust steam pressure is high more, and generating efficiency is low more.Direct-cooling type is sprayed water or spraying before being employed in blower fan, reduces condensate temperature, gas clean-up; But the air setting system is directly exposed in the atmosphere, takes away the pipeline heat simultaneously, also takes away the heat of surrounding air, and water loss is many.Indirect-cooling is sprayed water to heat exchanger, and what air cooling tower was discharged is saturated moist air, and water loss is also many.
Winter and summer are opposite, and condensate temperature is low more, and be should generating efficiency high more, but environment temperature is crossed and caused water pipe from freezing crack when low.In order to solve the water pipe from freezing crack problem, adopt the way that improves delivery temperature or restriction air inlet, though solved the water pipe from freezing crack problem, be cost to reduce generating efficiency.
Clammy unit is pursued long exhaust stage blade in order to raise the efficiency; Air-cooled Unit changes characteristics greatly in order to adapt to high back pressure and back pressure; Improve the root degree of reaction of exhaust stage blade; Be designed to shortly, wide, thick, strong, improve the rigidity and the intensity of blade, to take into account two kinds of extreme operating conditions of low discharge, high back pressure and big flow, low back pressure.
Air-cooled Unit is to come the conserve water resource with the cost that increases energy resource consumption, and generatine set heat efficiency reduces by 3～5%, reach the rated power identical with clammy unit, and the live steam flow increases by 3～5%, and net coal consumption rate increases by 3～5%.
When variation of ambient temperature was big, condensate temperature, exhaust steam pressure changed greatly, and unit is impacted greatly, and the low pressure (LP) cylinder shaft strength changes greatly.
The air cooling tower cooling, no matter heat exchanger still is the tower side at Ta Nei, and heat exchanger is arranged in triangle to increase heat exchange area; But it is limited that heat exchange area increases, and in order to improve heat exchange area, air cooling tower diameter volume is big; Cost is high, and the big exhaust of tower mouth diameter is prone to the influence of wind-engaging, the raising cooling water temperature.
Summary of the invention
For remedying above-mentioned defective, the present invention proposes a kind of funnel-shaped air cooling system, and this system is affected by environment little, and generating efficiency is high.
In order to achieve the above object, the present invention adopts following technical scheme to be achieved.
A kind of funnel-shaped air cooling system; It is characterized in that, comprise the chimney that rest on the ground, be positioned at underground Heat Room, cooling pond, expansion box and underground admission line; Said chimney bottom is connected with the outer top of said Heat Room; Said Heat Room comprises the air chamber of internal layer cavity and inside and outside interlayer, and said internal layer cavity top is provided with boiler, is provided with heat exchanger in the said air chamber; Said heat exchanger water inlet pipe is connected with said boiler, and said heat exchanger outlet pipe is connected with said cooling pond; The outer field bottom of said Heat Room is provided with air inlet, and said underground admission line is connected with said expansion box inlet, and said expansion box gas outlet is connected with said heat exchanger air inlet.
The characteristics of technique scheme are with further improving:
The outer layer segment of said underground admission line is provided with water jacket, and the upper end of said water jacket is connected with said boiler, and the lower end of said water jacket is connected with said cooling pond.
Said heat exchanger is provided with spray thrower, and said spray thrower is provided with the spray control valve.
Said air chamber is divided into a plurality of zones, and each zone vertically is provided with a plurality of interlayers, and each jacket space is placed with heat exchanger.
Said expansion box gas outlet or heat exchanger air inlet are provided with the air inlet adjustment valve.
Said underground admission line inlet is provided with filter.
Said expansion box is the annular space around Heat Room.
Be provided with turbogenerator between said air chamber outlet and the chimney inlet, the air outlet slit top of said turbogenerator is provided with fin, and said fin is connected with the cold junction of heat pipe, and said boiler is stretched in the hot junction of said heat pipe.
Air cooling system of the present invention partly is arranged at subsurface, and ambient influnence is less; Can according to coolant water temperature and variation of ambient temperature regulate air inflow, water spray, with the hot water amount of cold air heat exchange, make that cooling water temperature is lower and it is little to change, vacuum changes little, and is little to the impact of unit, water pipe can bursting by freezing, generating efficiency and water-cooled are suitable.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment technical scheme of the present invention is done further explain.
Fig. 1 is first kind of funnel-shaped air cooling system sketch map of the embodiment of the invention;
Fig. 2 is second kind of funnel-shaped air cooling system sketch map of the embodiment of the invention;
Fig. 3 is the third funnel-shaped air cooling system sketch map of the embodiment of the invention;
Wherein, 1, chimney; 2, boiler; 3, hot-water line; 4, heat exchanger; 5, spray thrower; 6, cooling pond; 7, filter; 8, hot water jacket; 9, expansion box; 10, fin; 11, turbogenerator; 12, heat pipe.
The specific embodiment
Clammy unit utilizes the water evaporative heat loss, and pressure at expulsion depends on the wet-bulb temperature of air, and is little with season and circadian variation.The Air-cooled Unit pressure at expulsion depends on the dry-bulb temperature of air, and is big with season and circadian variation, and in difference variation big season, intraday pressure at expulsion changes can reach 1～3 times.
At normal temperatures and pressures, specific heat of water is 1, and the specific heat of air is 0.237, and specific heat of water is 4.2 times of air, and the thermal conductivity factor of air is 6.1 * 10
-5, the thermal conductivity factor of water is 143 * 10
-5, the water thermal conductivity factor is 23.4 times of air, and the heat of vaporization of water is 40, and the volume ratio water of the air of equal in quality is a lot of greatly, and the cooling capacity of air is much littler than water.
The cooling of employing air controls to the cooling water temperature near water-cooled with cooling water temperature, and its generating efficiency is also just near water-cooled.Should set about 1 from the following aspects) the increase heat exchange area; 2) improve air velocity; 3) heat exchange air themperature is lower and change little; 4) reduce ambient temperature effect.
With reference to accompanying drawing 1; Comprise the chimney 1 that rest on the ground; Be positioned at underground Heat Room, the annular cooling water pond 6 below the Heat Room, around annular expansion box 9, boiler 2 and the underground admission line of Heat Room; Heat exchanger fin is equipped with in the side and the lower floor of expansion box 9, is used to exchange air heat in the expansion box 9; Underground admission line inlet obtains air admission hole and wind direction dorsad through wind direction from motion tracking, and is provided with filter 7 in underground admission line porch, is used for filtered air.
With the side a plurality of long and short admission lines are set above the annular expansion box 9, the progress feed channel is snakelike, and pipeline outer-layer partly is provided with water jacket.Long and short admission line cooperates in Various Seasonal, makes the air themperature in the expansion box 9 more reasonable.Annular expansion box 9 feasible air themperature and the pressure basically identicals that get into each heat exchanger, having eliminated air cooling tower is having diverse location air themperature and the irrational problem of the inconsistent heat exchange of pressure under the condition of wind.The annular expansion box 9 that capacity is huge makes the air and the original air kneading that stores of entering, and the air themperature, the pressure that get into heat exchanger change little.
The outer layer segment of underground air inlet long pipeline is provided with water jacket; The upper end of water jacket is connected with boiler 2; The lower end of water jacket is connected with cooling pond 6, the cold air reverse flow of the hot water of underground admission line outer wall and underground admission line inwall, heats cold air; Hot water is cooling gradually in the process of heats cold air, flows to the cooling pond from the pipeline of water jacket lower end; Water jacket is provided with temperature-adjusting device, temperature-adjusting device according to the temperature of cooling water and variation of ambient temperature regulate water jacket into and out of the water yield, the heats cold air had both solved the water pipe from freezing crack problem to reasonable temperature, also made unit keep higher generating efficiency.
Chimney 1 bottom is connected with the outer top of Heat Room, and Heat Room comprises the air chamber of internal layer cavity and inside and outside interlayer, and internal layer cavity top is provided with boiler 2; Boiler 2 inlets are connected with hot-water line 3; Air chamber is divided into a plurality of zones, and each zone vertically is provided with a plurality of interlayers, is placed with heat exchanger 4 in each jacket space; Heat exchanger 4 water inlet pipes are connected with boiler 2, and heat exchanger 4 outlet pipes are connected with cooling pond 6; The outer field bottom of Heat Room is provided with a plurality of air inlets, and the gas outlet of expansion box 9 is connected with the Heat Room air inlet, and air is assigned to each heat exchanger after getting into Heat Room.
Air chamber vertically is divided into a plurality of interlayers, and being convenient to needs the adjustment with jacket space, also is convenient to maintenance under non-stop-machine state.
Above-mentioned Heat Room ectonexine and chimney ectonexine are processed or outer surface scribbles insulation material by insulation material.
With reference to accompanying drawing 2, only be that with accompanying drawing 1 difference chimney 1 bottom directly is not connected with Heat Room, but will separating the chimney 1 of two places, the pipeline through an inclination is connected with Heat Room.
The embodiment of the invention has following advantage: at first, when installation and maintenance Heat Room, easy to operate; Secondly, chimney is built on another base, has reduced the chimney that is installed in above the Heat Room pressure to basic unit; At last, avoided the outer field pressure in chimney heat exchanging chamber, the outer field material of Heat Room can attenuate, reduces cost.
With reference to accompanying drawing 3; Accompanying drawing 3 is on the basis of accompanying drawing 1, and air chamber exports and between chimney 1 inlet, is provided with increases turbogenerator 11, and the air outlet slit top of turbogenerator 11 is provided with fin 10; Fin 10 is connected with the cold junction of heat pipe 12, and the hot junction of heat pipe 12 is stretched in the boiler 2.Air after heating is done work through turbine, the draft that improves chimney 1, the pressure reduction of increase wind generator turbines, generated output is high.Be mainly used in the area of serious water shortage, do not adorn spray equipment, cooling water temperature is high, and the hot water temperature who comes out from condenser is high, and big with the environment temperature temperature difference, thermal waste is many, and this system can the recovery section electric energy.
The funnel-shaped air cooling system of the present invention has following characteristics:
1) water evaporation loss is minimum under the identical condition of cooling
Shower water of the present invention is vaporized on pipeline and fin surface and is taken away heat, and air humidity increases, and the air thermal conductivity factor after humidity increases improves, and specific heat improves, and exchange capability of heat improves.Coolant-temperature gage in upper hose is high more, and humid air more up degree of intensification is also high more, and relative air humidity is more little, and it is many more that humid air carries heat.Boiler places above the heat exchanger, and is in chimney bottom, and it is the highest that air themperature reaches; Relative air humidity is minimum, and the temperature of chimney bottom humid air and chimney oral area temperature-difference are bigger, and stack draught is bigger; Air velocity is high; What from chimney, discharge is unsaturated air, and the heat absorption capacity of the water in the humid air obtains fine performance, and water evaporation loss is minimum under the identical condition of cooling.
2) space availability ratio is high
Vertical heat exchanger is installed in the Heat Room, and air gets into from the bottom, and the heat exchange stroke is long; The vertical heat exchanger of many rows is installed in the Heat Room, and heat exchange area is big, and idle space is little, and the Heat Room space availability ratio is high, solves the little problem of present air cooling tower unit's diameter heat exchange area.
3) affected by environment little
Heat Room, cooling pond, expansion box and underground admission line are placed in subsurface, reduce the direct influence of environment temperature heat exchanging device; Utilize the little characteristic of subsurface variations in temperature, make the air that gets into expansion box integrate, play the effect of eliminating the environment temperature acute variation.
4) cooling water temperature changes little
Regulate the air inflow, heat exchanger spray, heats cold air of air inlet etc. according to the variation of coolant water temperature, environment temperature, reduce the influence of variation of ambient temperature to cooling water temperature, set steady moves.To the heat exchanger surface shower water, reduce cooling water temperature when temperature is high; Utilize the water heats cold air that need cool off after the heat exchange winter, solve the water pipe from freezing crack problem; And hot water also is cooled, and cooling water temperature changes problem greatly when having solved extreme ambient temperature.Exhaust stage blade design simultaneously is the same or approaching with water-cooled, and generating efficiency improves.
5) heat exchange area is big and air velocity is high
Adopt vertical heat exchanger, with the condition of air cooling tower same diameter under heat exchange area big, little at the identical condition lower thermal exchanging chamber diameter of heat exchange area in other words; Air and hot water reverse flow, heat exchanger bottom and fresh air heat exchange are many, and top boiler air themperature is high, and chimney bottom and the oral area temperature difference are big, and chimney height is than air cooling tower height, and stack draught is big, the air velocity height; Both combinations are exactly that the heat exchange air mass flow is big.
It is the annular expansion box at center that expansion box in the various embodiments of the present invention also can adopt with the Heat Room; It is the center annular cooling pond that the cooling pond also can be adopted with the Heat Room, and therefore more favourable reduction environment temperature is to the influence of the funnel-shaped air cooling system of the present invention.
The funnel-shaped air cooling system of the present invention can be used for surface-type and hybrid indirect air cooling unit, changes slightly, also can be used for the direct-cooling type Air-cooled Unit, and does not need blower fan.
The present invention also has numerous embodiments, in every case in spirit of the present invention and essential scope, any change of being done, is equal to replacement and improvement, all within protection scope of the present invention.
Claims (8)
1. funnel-shaped air cooling system; It is characterized in that, comprise the chimney that rest on the ground, be positioned at underground Heat Room, cooling pond, expansion box and underground admission line; Said chimney bottom is connected with the outer top of said Heat Room; Said Heat Room comprises the air chamber of internal layer cavity and inside and outside interlayer, and said internal layer cavity top is provided with boiler, is provided with heat exchanger in the said air chamber; Said heat exchanger water inlet pipe is connected with said boiler, and said heat exchanger outlet pipe is connected with said cooling pond; The outer field bottom of said Heat Room is provided with air inlet, and said underground admission line is connected with said expansion box inlet, and said expansion box gas outlet is connected with said Heat Room air inlet.
2. funnel-shaped air cooling system as claimed in claim 1 is characterized in that, the outer layer segment of said underground admission line is provided with water jacket, and the upper end of said water jacket is connected with said boiler, and the lower end of said water jacket is connected with said cooling pond.
3. funnel-shaped air cooling system as claimed in claim 1 is characterized in that said heat exchanger is provided with spray thrower, and said spray thrower is provided with the spray control valve.
4. funnel-shaped air cooling system as claimed in claim 1 is characterized in that said air chamber is divided into a plurality of zones, and each zone vertically is provided with a plurality of interlayers, and each jacket space is placed with heat exchanger.
5. funnel-shaped air cooling system as claimed in claim 1 is characterized in that, said expansion box gas outlet or heat exchanger air inlet are provided with the air inlet adjustment valve.
6. funnel-shaped air cooling system as claimed in claim 1 is characterized in that, said underground admission line inlet is provided with filter.
7. funnel-shaped air cooling system as claimed in claim 1 is characterized in that, said expansion box is the annular space around Heat Room.
8. like any described funnel-shaped air cooling system of claim 1 to 7; It is characterized in that; Be provided with turbogenerator between said air chamber outlet and the chimney inlet; The air outlet slit top of said turbogenerator is provided with fin, and said fin is connected with the cold junction of heat pipe, and said boiler is goed deep in the hot junction of said heat pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268936.3A CN102759280B (en) | 2012-07-31 | 2012-07-31 | A kind of chimney-type air cooling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268936.3A CN102759280B (en) | 2012-07-31 | 2012-07-31 | A kind of chimney-type air cooling system |
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| Publication Number | Publication Date |
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| CN102759280A true CN102759280A (en) | 2012-10-31 |
| CN102759280B CN102759280B (en) | 2016-11-16 |
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| CN201210268936.3A Expired - Fee Related CN102759280B (en) | 2012-07-31 | 2012-07-31 | A kind of chimney-type air cooling system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB292466A (en) * | 1927-06-18 | 1929-09-09 | Auguste Chanard | Improvements in and relating to apparatus for cooling water of condensation |
| US5129456A (en) * | 1987-05-08 | 1992-07-14 | Energiagazdalkodasi Intezet | Dry-operated chimney cooling tower |
| CN201632193U (en) * | 2010-04-02 | 2010-11-17 | 华电重工装备有限公司 | Dry cooling tower, desulfurizer and chimney integrated device for power station |
| CN102213119A (en) * | 2011-04-29 | 2011-10-12 | 赵振海 | Chimney-type air heat-exchange power generation system |
-
2012
- 2012-07-31 CN CN201210268936.3A patent/CN102759280B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB292466A (en) * | 1927-06-18 | 1929-09-09 | Auguste Chanard | Improvements in and relating to apparatus for cooling water of condensation |
| US5129456A (en) * | 1987-05-08 | 1992-07-14 | Energiagazdalkodasi Intezet | Dry-operated chimney cooling tower |
| CN201632193U (en) * | 2010-04-02 | 2010-11-17 | 华电重工装备有限公司 | Dry cooling tower, desulfurizer and chimney integrated device for power station |
| CN102213119A (en) * | 2011-04-29 | 2011-10-12 | 赵振海 | Chimney-type air heat-exchange power generation system |
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| CN102759280B (en) | 2016-11-16 |
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