CN2884109Y - High efficiency heat-exchanger of steam condenser, and said condenser - Google Patents
High efficiency heat-exchanger of steam condenser, and said condenser Download PDFInfo
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- CN2884109Y CN2884109Y CN 200620089929 CN200620089929U CN2884109Y CN 2884109 Y CN2884109 Y CN 2884109Y CN 200620089929 CN200620089929 CN 200620089929 CN 200620089929 U CN200620089929 U CN 200620089929U CN 2884109 Y CN2884109 Y CN 2884109Y
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- efficiency heat
- heat exchanger
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Abstract
The utility model provides a high efficiency heat exchanging device for the condenser, which is characterized in that the utility model comprises a helical band 1 and a fixed baffle 2 by which the helical band 1 is fixed on a cooling pipe 4; the end of the helical band 1 is fixed on the fixed baffle 2. The high efficiency heat exchanging device for the condenser as well as the condenser has the advantages of simple structure, convenient installation and refitment, great improvement of heat exchange coefficient, reduction of steam consumption for power generation and reduction of coal consumption for power generation, and reduction of water consumption of the unit and chemical agent adding, and is in accordance with the theme of energy saving, environmental protection and water saving for power generation in thermal power plant in the 21st century completely.
Description
Technical field
The utility model relates to heat-exchange device, is particularly useful for the used condenser in thermal power plant.
Background technology
The every heat loss of large-size thermal power plant is approximately: boiler heat loss＞9%, pipeline heat loss＞1%, turbine discharge heat loss＞50%, steam turbine mechanical loss＞2%, generator loss＞1% ... draw from " Thermal Power Engineering design manual ".
Steamer machinery heat loss more than 50% has not only been brought the huge waste of the energy, has also brought a large amount of environmental pollutions.The steam discharge heat loss is meant that cooling water takes away the loss general name that heat causes from condenser.Under the certain situation of condensing capacity, cooling water flow and inlet water temperature, improve condenser heat exchange effect, reduce the condenser copper tube inside and outside wall temperature difference, the outer steam of pipe just can be rapidly by water condensation, volume-diminished, vacuum improves.The generating capacity of steam improves, more heats of steam are converted into electric energy, cause the temperature (exhaust temperature) of steam to reduce, the leaving water temperature of cooling water also reduces, exhaust temperature and cooling water leaving water temperature (position heat is poor) are reduced, and the heat that cooling water is taken away reduces, i.e. turbine discharge loss reduces, also just can reduce the generating steam consumption, also just reduce gross coal consumption rate.Can also reduce the unit water consumption, the saves valuable water resource reduces and adds chemical agent, alleviates Environmental Chemistry and pollutes.
Most of thermal power plant is to be that fuel is heated to be water vapour to the water in the boiler with the coal, and the steam supply turbine rotates, and steam turbine drives the generator rotation and generates electricity.Steam turbine outlet steam need be cooled to water through condenser.And in condenser cooling tube 4 the general 1～2m/s of recirculated water flow velocity, general 30～40 ℃ of cooling water temperature flows in cooling tube 4 to be laminar condition.Flow through the water of tube wall because the water viscosity effect, near wall, form the very big thin layer of velocity gradient, be called detention layer.The flow velocity of water is parabolic distribution in the pipe, and the detention layer water flow velocity of tube wall is very low, and tube hub water speed is the fastest.Such velocity flow profile causes tube wall temperature to be higher than the centre temperature, obviously at first influences the heat exchange effect, and tube wall temperature height, flow velocity are low, can obviously strengthen dirt deposition.This be because: 1. the solubility of slightly soluble salt in the high cooling water of temperature (as calcium carbonate etc.) descends, and causes incrustation scale to be separated out, on tube wall.2. in the cooling water based on microorganism (microorganisms such as bacterium, mould, algae) and coherent mucilage (polysaccharide, protein etc.), be mixed with silt, inorganic matter etc. and form the ooze dirt, be called foundry loam.Because the temperature height makes its flocculating, generate biological floc in detention layer, in low flow velocity wall portion, its is understood sedimentation and generates mud.
When the condenser cooling water tube wall adheres to incrustation scale, behind the foundry loam, produce harm and be:
1. increase resistance to water-flow, reduce cooling water flow, increase the water circulating pump energy consumption;
2. because the thermal conductivity (thermal conductivity factor) of dirt is very low, have a strong impact on the heat exchange effect, cause vacuum to reduce, the steam consumption increases, and reduces steam turbine and exerts oneself, and generated energy reduces;
3. incrustation scale and dirt have corrosiveness to tube wall, and it is coarse that the lighter becomes smooth tube wall.Rough surface cans be compared to many cavitys, increases 6～10 times than smooth surface.The increase of surface area increases metal covering table and dirt touch opportunity and adhesion strength.Solution in the cavity is in the high temperature stagnant area, concentrates, various effects such as crystallization, sedimentation, polymerization all here take place, and have promoted dirt deposition.Corrosion weight person makes the tube wall perforation cause serious accident.
The principal element that influences condenser heat exchange effect is:
Improve the present common method of condenser heat exchange effect: mainly be pipe blow-through, antiscaling, descaling.
1. the antiscale of glueballs on-line cleaning, scale removal.Having drawback often is stifled ball, loses ball, and maintenance is big, and effect is undesirable.
2. chemical method on-line cleaning (circulation dosing).Can not fundamentally solve fouling, the expense height brings a large amount of blowdowns, chemical contamination.
3. shut down cleanings such as artificial mechanism cleaning, Chemical cleaning, giant.Waste time and energy, the retention time is short, and shutdown causes damage.
4. the self-cleaning of rotation twisted strip is installed in spool.This is to occur product in the recent period, because that this product cleans dynamics to the condenser tube inwall on the principle is little, effect is undesirable after the small power plant trial assembly.
Therefore, the not high problem of condenser heat exchange efficiency does not still have effective way to solve at present.Cause thermal power plant very big, so there is tight demand in thermal power plant to improving condenser heat exchange product at aspect pressure such as energy-conservation, water saving, environmental protection.
Summary of the invention
The purpose of this utility model is the heat-exchange device that provides respond well on a kind of descaling and antiscaling.
The utility model provides a kind of condenser high-efficiency heat exchanger, it is characterized in that: by hurricane band 1 and fixedly the fixed dam 2 of hurricane band 1 constitute, hurricane band 1 termination is fixed on the fixed dam 2.The cooling water that circulates during work has certain pressure to flow in cooling tube 4, and water is forced to set track forward according to device.The flow direction of in-tube condensation water is by original simple axially laminar flow, and changing into along tube wall radially has the certain angle spiral turbulence.The tube wall detention layer is subjected to intense impact, makes calcium carbonate and biological clay not free attached on the tube wall, does not form incrustation scale and biological clay, has destroyed incrustation scale and biological clay forms mechanism.When the water spiral advances tube wall there is shearing force.Thereby the resistance of heat exchange between condensed water and steam in the reduction condenser can obviously be improved the thermal power unit condenser heat exchange efficiency.
The condenser high-efficiency heat exchanger that the utility model provides, its hurricane band 1 can be porose on the termination, is enclosed within the protruding of fixed dam 2 and nails on.
The condenser high-efficiency heat exchanger that the utility model provides, the angle of pitch of its hurricane band 1 can be 15 °～25 °, and thickness is 1～2mm, and the diameter in hole is 1.5～3mm on hurricane band 1 termination.
The condenser high-efficiency heat exchanger that the utility model provides, the protruding head of a nail diameter of its fixed dam 2 is than the big 0.1～0.15mm of diameter in hole on hurricane band 1 termination.
The condenser high-efficiency heat exchanger that the utility model provides, its fixed dam 2 can have bolt, is inserted in hurricane band 1 in the hole on the termination, fixes with nut.
The utility model also provides a kind of condenser that has the condenser high-efficiency heat exchanger, constitute by shell 3, dividing plate 5, cooling tube 4 and condenser high-efficiency heat exchanger, cooling tube 4 places shell 3, dividing plate 5 is separated into vapour road and water route with 3 li spaces of shell, the condenser high-efficiency heat exchanger is contained in 4 li of cooling tubes, it is characterized in that: described condenser high-efficiency heat exchanger is made of hurricane band 1 and fixed dam 2 that hurricane band 1 is fixed in the cooling tube 4, and hurricane band 1 termination is fixed on the fixed dam 2.
The condenser that has the condenser high-efficiency heat exchanger that the utility model provides, its cooling tube 4 and condenser high-efficiency heat exchanger can have many groups, and each group all is connected in the water route.
The condenser that has the condenser high-efficiency heat exchanger that the utility model provides, the length of its hurricane band 1 can be than cooling tube 4 long 30～50mm.
The condenser that has the condenser high-efficiency heat exchanger that the utility model provides, the length of its fixed dam 2 can be than the internal diameter of cooling tube 4 big 8～15mm.
Condenser high-efficiency heat exchanger and condenser thereof that the utility model provides, its advantage is: simple in structure, installation and repacking are convenient, increase substantially the coefficient of heat transfer, reduce the generating steam consumption, thereby reduce gross coal consumption rate, reduce the unit water consumption, reduce and add chemical agent, meet 21 century thermal power plant's generating theme fully: " energy-saving and environmental protection, water saving ".
Description of drawings
Fig. 1 is the structural representation of condenser high-efficiency heat exchanger;
Fig. 2 is the structure of condenser schematic diagram that has the condenser high-efficiency heat exchanger;
Fig. 3 is the structural representation of fixed dam 2;
Fig. 4 is the structure of condenser schematic diagram that has another kind of condenser high-efficiency heat exchanger;
Fig. 5 is the structural representation of another kind of condenser high-efficiency heat exchanger;
Fig. 6 is the structural representation of another kind of fixed dam 2.
The specific embodiment
The condenser (see figure 2) that has the condenser high-efficiency heat exchanger, by shell 3, three dividing plates 5, two cooling tubes 4 and two condenser high-efficiency heat exchanger (see figure 1)s constitute, two cooling tubes 4 place shell 3, three dividing plates 5 are separated into vapour road and water route with 3 li spaces of shell, two condenser high-efficiency heat exchangers are contained in 4 li of two cooling tubes respectively, the condenser high-efficiency heat exchanger is made of fixed dam 2 (see figure 3)s that hurricane band 1 and two one or two hurricane bands 1 are fixed in the cooling tube 4, the angle of pitch of hurricane band 1 can be 20 °, thickness is 1.5mm, hurricane band 1 has two holes on the termination, diameter is 2.5mm, and the length of hurricane band 1 can be than cooling tube 4 long 30mm.The length of fixed dam 2 is than the big 10mm of internal diameter of cooling tube 4, and the protruding head of a nail diameter of fixed dam 2 is 2.6mm.Two borehole jacks on the hurricane band 1 are two protruding nailing on of fixed dam 2.
With the 200MW unit is example, under situation mutually of the same race, one group of cooling tube 4 is a blank pipe, another group cooling tube 4 adds this device, carry out the heat exchange effect comparison, consequently: after high-efficiency heat exchanger is installed in thermal power plant condenser cooling tube 4 roads, keeping under the condenser vacuum condition, reducing by 7 ℃ of condenser terminal differences～below 10 ℃; Amount of makeup water can reduce 1/4～1/5; Steam mono-consumption 2.87kg/kWh descends 5%～19%; Exempt to clean; Improve equipment life; Can reduce the circulating pump energy consumption; Coagulate unit under equal load, can increase rate of air sucked in required; Can reduce circulation and add dose.Reduce environmental pollution: reduce CO2 discharge capacity 6.11t/h; Reduce CO discharge capacity 1.98kg/h.
The condenser (see figure 4) that has the condenser high-efficiency heat exchanger, by shell 3, three dividing plates 5, two cooling tubes 4 and two condenser high-efficiency heat exchanger (see figure 5)s constitute, two cooling tubes 4 place shell 3, three dividing plates 5 are separated into vapour road and water route with 3 li spaces of shell, two condenser high-efficiency heat exchangers are contained in 4 li of two cooling tubes respectively, the condenser high-efficiency heat exchanger is made of hurricane band 1 and fixed dam 2 (see figure 6)s that hurricane band 1 is fixed in the cooling tube 4, the angle of pitch of hurricane band 1 can be 15 °, thickness is 2mm, hurricane band 1 has two holes on a termination, diameter is 2.6mm, and the length of hurricane band 1 is than cooling tube 4 long 40mm.The length of fixed dam 2 has two bolt M2.5mm than the big 15mm of internal diameter of cooling tube 4 on the fixed dam 2.Two bolts of fixed dam 2 are by two holes on the hurricane band 1, and are fastening with nut.
Claims (10)
1, a kind of condenser high-efficiency heat exchanger is characterized in that: by hurricane band (1) and fixedly the fixed dam (2) of hurricane band (1) constitute, hurricane band (1) termination is fixed on the fixed dam (2).
2, according to the described condenser high-efficiency heat exchanger of claim 1, it is characterized in that: porose on described hurricane band (1) termination, be enclosed within protruding the nailing on of fixed dam (2).
3, according to the described condenser high-efficiency heat exchanger of claim 2, it is characterized in that: the angle of pitch of described hurricane band (1) is 15 °～25 °, and thickness is 1～2mm.
4, according to the described condenser high-efficiency heat exchanger of claim 2, it is characterized in that: the diameter in hole is 1.5～3mm on described hurricane band (1) termination.
5, according to the described condenser high-efficiency heat exchanger of claim 2, it is characterized in that: described protruding head of a nail diameter is than the big 0.1mm of diameter in hole on hurricane band (1) termination.
6, according to the described condenser high-efficiency heat exchanger of claim 1, it is characterized in that: described fixed dam (2) has bolt, is inserted in the hole on hurricane band (1) termination, fixes with nut.
7, a kind of condenser that has the condenser high-efficiency heat exchanger, constitute by shell (3), dividing plate (5), cooling tube (4) and condenser high-efficiency heat exchanger, cooling tube (4) places shell (3), dividing plate (5) is separated into vapour road and water route with shell (3) space, lining, the condenser high-efficiency heat exchanger is contained in cooling tube (4) lining, it is characterized in that: described condenser high-efficiency heat exchanger is made of hurricane band (1) and fixed dam (2) that hurricane band (1) is fixed in the cooling tube (4), and hurricane band (1) termination is fixed on the fixed dam (2).
8, according to the described condenser that has the condenser high-efficiency heat exchanger of claim 7, it is characterized in that: described cooling tube (4) and condenser high-efficiency heat exchanger have many groups, and each group all is connected in the water route.
9, according to claim 7 or the 8 described condensers that have the condenser high-efficiency heat exchanger, it is characterized in that: the length of described hurricane band (1) is than the long 30～50mm of cooling tube (4).
10, according to claim 7 or the 8 described condensers that have the condenser high-efficiency heat exchanger, it is characterized in that: the length of described fixed dam (2) is than the big 8～15mm of internal diameter of cooling tube (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620089929 CN2884109Y (en) | 2006-03-21 | 2006-03-21 | High efficiency heat-exchanger of steam condenser, and said condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620089929 CN2884109Y (en) | 2006-03-21 | 2006-03-21 | High efficiency heat-exchanger of steam condenser, and said condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2884109Y true CN2884109Y (en) | 2007-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620089929 Expired - Fee Related CN2884109Y (en) | 2006-03-21 | 2006-03-21 | High efficiency heat-exchanger of steam condenser, and said condenser |
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| Country | Link |
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| CN (1) | CN2884109Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968705A (en) * | 2013-01-25 | 2014-08-06 | 肖才新 | Condenser copper tube flow guide energy-saving device |
| CN109387090A (en) * | 2018-10-26 | 2019-02-26 | 唐山钢铁集团有限责任公司 | A kind of spiral condensing heat exchanger and heat-exchange method |
-
2006
- 2006-03-21 CN CN 200620089929 patent/CN2884109Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968705A (en) * | 2013-01-25 | 2014-08-06 | 肖才新 | Condenser copper tube flow guide energy-saving device |
| CN109387090A (en) * | 2018-10-26 | 2019-02-26 | 唐山钢铁集团有限责任公司 | A kind of spiral condensing heat exchanger and heat-exchange method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070328 Termination date: 20120321 |