CN205037396U - Waste heat recovery heating system with expansion work is retrieved - Google Patents
Waste heat recovery heating system with expansion work is retrieved Download PDFInfo
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- CN205037396U CN205037396U CN201520789794.4U CN201520789794U CN205037396U CN 205037396 U CN205037396 U CN 205037396U CN 201520789794 U CN201520789794 U CN 201520789794U CN 205037396 U CN205037396 U CN 205037396U
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Abstract
The application discloses waste heat recovery heating system with expansion work is retrieved includes: steam turbine, turbine, centrifugal compressor, condenser, expander, evaporimeter, heat supply network circulating pump, peak load calorifier, cooling tower and condenser, centrifugal compressor, condenser, expander and evaporimeter pass through the tube coupling and become circulation circuit, and high temperature drive steam in the steam turbine lets in the turbine through the pipeline of drawing of steam turbine throat, the acting of drive turbine, and exhaust steam after the acting is by the turbine afterbody peak load calorifier that discharges, turbine acting drive centrifugal compressor, expander pass through the power supply of the inflation acting of refrigerant as the heat supply network circulating pump, this heat supply network circulating pump is squeezed into the condenser with municipal heat supply network return water and is carried out one -level heating, then gets into peak load calorifier and carry out the second grade heating, confesses after reaching demand heat supply temperature, gives municipal heat supply.
Description
Technical field
The application relates to a kind of waste heat recovery heating system reclaimed with expansion work, belongs to steam waste heat cascade utilization technical field.
Background technology
Heating system heating extraction pressure temperature in prior art is all very high, cannot match with the temperature, pressure of heating demands.Current heat recovery technology adopts absorption heat pump heat recovery technology or electric compression heat pump heat recovery technology, the overbottom pressure of steam cannot be made full use of, also the remaining temperature of steam cannot be made full use of, circulating pump needs the extra electric energy that consumes as driving force, fully cannot reclaim the waste heat of cooling-tower circulating water, whole thermodynamic cycle is perfect not.
Such as document CN201401197Y discloses a kind of exhaust steam in steam turbine heat that utilizes to heat the condensing system of heating water, comprise generator, steam turbine, direct air cooling system, described direct air cooling system comprises air cooling blow-off line, valve on air cooling blow-off line, air cooling tubes condenser, air cooling blower fan, air cooling condensing water conduit, valve on air cooling condensing water conduit, air cooling vacuum lead, vaccum-pumping equipment and condensation water collecting device, the air cooling blow-off line of described direct air cooling system has been arranged in parallel a road vapor-water heat exchanger system, described vapor-water heat exchanger system comprises vapor-water heat exchanger, vapor-water heat exchanger condensing water conduit, valve on vapor-water heat exchanger condensing water conduit, vapor-water heat exchanger admission pipeline, valve and vapor-water heat exchanger vacuum lead on vapor-water heat exchanger admission pipeline, described vapor-water heat exchanger vacuum lead accesses described vaccum-pumping equipment, vapor-water heat exchanger condensing water conduit accesses described condensation water collecting device.Comprise the condenser system that two-way is relatively independent, wherein a road is former direct air cooling system, primarily of valve 8, air cooling vacuum lead 9, vaccum-pumping equipment 10 and condensation water collecting device (steam exhaust device, condensate tank) 16 composition on valve 4, air cooling tubes condenser 5, air cooling blower fan 6, air cooling condensing water conduit 7, air cooling condensing water conduit on generator 1, steam turbine 2, air cooling blow-off line 3, air cooling blow-off line.Another road is in the upper vapor-water heat exchanger system in parallel of former direct air cooling system exhaust line 3 (or the condensation water collecting device 16 below steam turbine), forms primarily of valve 15, condensation water collecting device (steam exhaust device, condensate tank) 16, vapor-water heat exchanger vacuum lead 17 and vaccum-pumping equipment 10 on valve 13, vapor-water heat exchanger admission pipeline 14, vapor-water heat exchanger admission pipeline on vapor-water heat exchanger 11, vapor-water heat exchanger condensing water conduit 12, vapor-water heat exchanger condensing water conduit.In this condenser system, steam turbine 2 is discharged exhaust steam and is directly sent in air cooling tubes condenser 5 by air cooling blow-off line 3, the air cooling blower fan 6 of air cooling tubes condenser 5 bottom makes cold air from bottom to top flow through air cooling tubes condenser 5 outer surface, air and steam turbine 2 steam discharge is made to carry out heat exchange, exhaust steam is condensed into water, condensate water flows to condensation water collecting device (steam exhaust device, condensate tank) 16 by air cooling condensing water conduit 7, then sends peripheral system 18 back to.Steam turbine 2 is discharged exhaust steam and is also sent in vapor-water heat exchanger 11 by vapor-water heat exchanger admission pipeline 14, and carry out heat exchange with hot water, exhaust steam is condensed into water.Wherein condensate water flows to condensation water collecting device (steam exhaust device, condensate tank) 16 by vapor-water heat exchanger condensing water conduit 12, then sends peripheral system 18 back to, is delivered to heating system heat for user by the hot water after heating.Vaccum-pumping equipment 10, for extracting the incoagulable gas in air cooling tubes condenser 5 and vapor-water heat exchanger 11, maintains the vacuum of system and ensures equipment heat exchange efficiency.When unit carries out the operation of confession thermal condition, under system vacuum meets the requirements of situation, first valve 8 on valve 4 on air cooling blow-off line and air cooling condensing water conduit is closed, valve 13 on valve 15 on vapor-water heat exchanger admission pipeline and vapor-water heat exchanger condensing water conduit is opened, namely first steam turbine 2 steam discharge is sent into heat hot water in vapor-water heat exchanger 11.Change at heating demand, and steam turbine 2 remains displacement when being greater than the antifreeze load of air cooling tubes condenser 5 (being determined by air cooling tubes condenser heat exchange property), to open on air cooling blow-off line valve 8 on valve 4 and air cooling condensing water conduit as required, start air cooling blower fan 6 simultaneously, open the quantity of valve and start the quantity of air cooling blower fan, rotating speed determines by service requirement, its objective is when the heat exchange load of vapor-water heat exchanger changes according to heat demand, maintain the pressure of system in claimed range.Change at heating demand, and steam turbine residue displacement is not when meeting the antifreeze load of air cooling tubes condenser (being determined by air cooling tubes condenser heat exchange property), to close on air cooling blow-off line valve 8 on valve 4 and air cooling condensing water conduit, close air cooling blower fan 6 simultaneously, regulate the displacement of steam turbine 2 as required, its objective is when the heat exchange load of vapor-water heat exchanger changes according to heat demand, maintain the pressure of system in claimed range.Unit carry out non-heating operating mode run time, on vapor-water heat exchanger condensing water conduit, on valve 13 and vapor-water heat exchanger admission pipeline, valve 15 is closed, and vapor-water heat exchanger 11 drops into maintenance, and all for steam turbine steam discharges are sent into condensation in air cooling tubes condenser 5.
Summary of the invention
The object of the application is to solve the problem, and provides a kind of novel heating system.
Heating system described in the application comprises: steam turbine, turbine, centrifugal compressor, condenser, decompressor, evaporimeter, pumps for hot water supply net, peak load calorifier, cooling tower and condenser, described centrifugal compressor, condenser, decompressor and evaporimeter connect into closed circuit by pipeline, and the high temperature driven steam in described steam turbine passes into turbine by the introduction pipe of steam turbine throat, driving turbine does work, and the exhaust steam after acting is discharged to peak load calorifier by turbine afterbody; Turbine acting drives centrifugal compressor, is the refrigerant vapour of HTHP low-temperature low-pressure refrigerant both vapor compression; High-temperature high-pressure refrigerant steam enters condenser, heat release condensation within the condenser, the cold-producing medium of condensation is done work by expander, after acting, cold-producing medium becomes the liquid of low-temp low-pressure, then evaporimeter is entered, in evaporimeter, heat absorption evaporation becomes the refrigerant gas of low-temp low-pressure, then is centrifuged compressor suction compression further; Described decompressor passes through the power source of expansion work as pumps for hot water supply net of cold-producing medium; Municipal heat supply network backwater is squeezed into condenser and is carried out one-level heating by this pumps for hot water supply net, then enters peak load calorifier and carries out secondary heating, confess, to city heat supply after reaching demand heat supply temperature.
The exhaust steam of being discharged by turbine afterbody enters peak load calorifier and carries out secondary heating to municipal heat supply network backwater, and after heat exchange, exhaust steam becomes the discharge of solidifying water.
Described steam turbine is communicated with condenser by pipeline, exhaust steam heat release condensation in this condenser that steam turbine is discharged; Cooling water in described cooling tower passes into this condenser and cools exhaust steam; Enter evaporimeter for cold-producing medium from this condenser cooling water out and thermal source is provided; Come back to cooling tower from this evaporimeter cooling water to be out cooled.
Compared with prior art, the beneficial effect of technical scheme is:
The heating system of the application can reclaim decompressor acting as the power source of pumps for hot water supply net, and carry out classified utilization to steam, drive turbine with the high-pressure section of steam, low-pressure section is as spike heat source.Compared with prior art there is following advantage:
1 overbottom pressure making full use of steam is done work;
The 2 remaining temperature making full use of steam heat;
3 reclaim the driving force of decompressor acting as circulating pump;
4 fully reclaim cooling-tower circulating water waste heat;
The thermodynamic perfect degree of the whole thermodynamic cycle of 5 raising, improves whole process.
Accompanying drawing explanation
Fig. 1 is the structural representation of the heating system described in the application.
Detailed description of the invention
Be clearly and completely described the technical scheme in the application below in conjunction with accompanying drawing, obviously, described embodiment is only a part of embodiment of the application, instead of whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of the application's protection.
As shown in Figure 1, heating system described in the application comprises: steam turbine 1, turbine 2, centrifugal compressor 3, condenser 4, decompressor 5, evaporimeter 6, pumps for hot water supply net 7, peak load calorifier 8, cooling tower 9 and condenser 10, described centrifugal compressor 3, condenser 4, decompressor 5 and evaporimeter 6 connect into closed circuit by pipeline, high temperature driven steam in described steam turbine 1 passes into turbine 2 by the introduction pipe of steam turbine 1 throat, and drive turbine 2 to do work, the exhaust steam after acting is discharged to peak load calorifier 8 by turbine 2 afterbody; Turbine 2 does work and drives centrifugal compressor 3, is the refrigerant vapour of HTHP low-temperature low-pressure refrigerant both vapor compression; High-temperature high-pressure refrigerant steam enters condenser 4, heat release condensation in condenser 4, the cold-producing medium of condensation is by decompressor 5 expansion work, after acting, cold-producing medium becomes the liquid of low-temp low-pressure, then evaporimeter 6 is entered, in evaporimeter 6, heat absorption evaporation becomes the refrigerant gas of low-temp low-pressure, then is centrifuged compressor 3 suction compression further; Described decompressor 5 passes through the power source of expansion work as pumps for hot water supply net 7 of cold-producing medium; Municipal heat supply network backwater is squeezed into condenser 4 and is carried out one-level heating by this pumps for hot water supply net 7, then enters peak load calorifier 8 and carries out secondary heating, confess, to city heat supply after reaching demand heat supply temperature.
The exhaust steam of being discharged by turbine 2 afterbody enters peak load calorifier 8 and carries out secondary heating to municipal heat supply network backwater, and after heat exchange, exhaust steam becomes the discharge of solidifying water.
Described steam turbine 1 is communicated with condenser 10 by pipeline, exhaust steam heat release condensation in this condenser 10 that steam turbine 1 is discharged; Cooling water in described cooling tower 9 passes into the 10 pairs of exhaust steam of this condenser and cools; Enter evaporimeter 6 for cold-producing medium from this condenser 10 cooling water out and thermal source is provided; Come back to cooling tower 9 from this evaporimeter 6 cooling water to be out cooled.
Described decompressor outwards exports principle that mechanical power makes gas temperature reduce when utilizing expansion of compressed gas step-down to obtain the machinery of energy.Decompressor is divided into Piston Expander and turbo-expander two class by forms of motion and structure.Piston Expander is mainly applicable to the middle-size and small-size height of high-pressure ratio and low discharge, middle pressure profound hypothermia equipment.Turbo-expander, compared with Piston Expander, has the features such as flow is large, structure is simple, volume is little, efficiency is high and grow service cycle, is applicable to big-and-middle-sized profound hypothermia equipment.
Piston Expander makes gas expand in variable volume, exports external work.This decompressor discrete and horizontal two kinds.Adopting more is vertical structure, bent axle, connecting rod, crosshead, piston, intake valve and air bleeding valve etc. are movement parts, be contained in fuselage, cylinder and middle base respectively, its effect is similar to reciprocating-piston compressor, but its inlet and outlet valve system borrows the timing of inlet and outlet cam to open and close.The loss of refrigeration capacity that Piston Expander causes owing to there is inlet and outlet valve flow resistance, incomplete expansion, frictional heat, outer heat and internal heat exchange etc., general adiabatic efficiency is: high pressure expansion machine 65 ~ 85%, middle-pressure expansion machine 60 ~ 70%.Decrease the movement parts of decompressor without the valveless of cam drive and single valve decompressor, improve machine run reliability.Adopt the metal potted component adding the teflon seal element replacement oil lubrication of filler, avoid lubricating oil to bring profound hypothermia rectification zone or liquify area into, ensure that safety.
Turbo-expander carrys out transferring energy with the change of gas expansion hourly velocity energy.This decompressor have single-stage and twin-stage, vertical and horizontal, impulse and reactionary style point.General employing single-stage centripetal runoff reaction decompressor, the external work spread out of absorbed by generator, air blast or oil brake.It is similar to single-stage radial compressor, but has (adjustable vane) air deflector of adjusting air inflow quantity.The oily forced feed lubrication of low speed bearing, employing gas bearing at a high speed.Turbo-expander invades loss owing to having nozzle loss, impeller loss, leaving loss, disk friction loss, leakage loss, channelling loss and outer heat, and general adiabatic efficiency is: middle-pressure expansion machine 65 ~ 75%, low-pressure expansion machine 75 ~ 85%.
Be described in further detail principle and the flow process of the heating system of the application below:
Steam flow: steam turbine 1 out high temperature driven steam drives turbine to do work through turbine 2, the exhaust steam that turbine afterbody is discharged enters peak load calorifier 8, and heat release enters the former water system of power plant after condensing into water.
Refrigerant flow circuit: turbine 2 does work and drives centrifugal compressor 3, be the refrigerant vapour of HTHP low-temperature low-pressure refrigerant both vapor compression, high-temperature high-pressure refrigerant steam enters condenser 4, heat release is condensed into high-temperature high-pressure refrigerant within the condenser, cooled cold-producing medium is by decompressor 5 expansion work, cold-producing medium becomes the liquid of low-temp low-pressure, then evaporimeter 6 is entered, evaporation of absorbing heat in evaporimeter becomes low-temperature low-pressure refrigerant gas, sucked compression by compressor further again, complete a complete circulation.
Hot net water system: municipal heat supply network backwater is squeezed into condenser 4 by pumps for hot water supply net 7 low-temperature return water and carried out one-level heating, and then enter peak load calorifier and carry out secondary heating, the demand heat supply temperature of reaching is confessed, to city heat supply.
In sum, be the embodiment of the present application content, and obviously the embodiment of the application is not limited in this, it according to different application environment, can utilize the functional realiey corresponding demand of the application.
Claims (3)
1. the waste heat recovery heating system reclaimed with expansion work, it is characterized in that, comprise: steam turbine, turbine, centrifugal compressor, condenser, decompressor, evaporimeter, pumps for hot water supply net, peak load calorifier, cooling tower and condenser, described centrifugal compressor, condenser, decompressor and evaporimeter connect into closed circuit by pipeline, and the high temperature driven steam in described steam turbine passes into turbine by the introduction pipe of steam turbine throat, driving turbine does work, and the exhaust steam after acting is discharged to peak load calorifier by turbine afterbody; Turbine acting drives centrifugal compressor, is the refrigerant vapour of HTHP low-temperature low-pressure refrigerant both vapor compression; High-temperature high-pressure refrigerant steam enters condenser, heat release condensation within the condenser, the cold-producing medium of condensation is done work by expander, after acting, cold-producing medium becomes the liquid of low-temp low-pressure, then evaporimeter is entered, in evaporimeter, heat absorption evaporation becomes the refrigerant gas of low-temp low-pressure, then is centrifuged compressor suction compression further; Described decompressor passes through the power source of expansion work as pumps for hot water supply net of cold-producing medium; Municipal heat supply network backwater is squeezed into condenser and is carried out one-level heating by this pumps for hot water supply net, then enters peak load calorifier and carries out secondary heating, confess, to city heat supply after reaching demand heat supply temperature.
2. heating system according to claim 1, is characterized in that, the exhaust steam of being discharged by turbine afterbody enters peak load calorifier and carries out secondary heating to municipal heat supply network backwater, and after heat exchange, exhaust steam becomes the discharge of solidifying water.
3. heating system according to claim 2, is characterized in that, described steam turbine is communicated with condenser by pipeline, exhaust steam heat release condensation in this condenser that steam turbine is discharged; Cooling water in described cooling tower passes into this condenser and cools exhaust steam; Enter evaporimeter for cold-producing medium from this condenser cooling water out and thermal source is provided; Come back to cooling tower from this evaporimeter cooling water to be out cooled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520789794.4U CN205037396U (en) | 2015-10-14 | 2015-10-14 | Waste heat recovery heating system with expansion work is retrieved |
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| CN201520789794.4U CN205037396U (en) | 2015-10-14 | 2015-10-14 | Waste heat recovery heating system with expansion work is retrieved |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108506991A (en) * | 2018-05-16 | 2018-09-07 | 北京国电蓝天节能科技开发有限公司 | A kind of steam turbine exhaust heat upgrading heating system |
| CN108626766A (en) * | 2018-05-05 | 2018-10-09 | 大连葆光节能空调设备厂 | A kind of coupling heating system using waste heat of plant and residual heat of electric power plant |
-
2015
- 2015-10-14 CN CN201520789794.4U patent/CN205037396U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626766A (en) * | 2018-05-05 | 2018-10-09 | 大连葆光节能空调设备厂 | A kind of coupling heating system using waste heat of plant and residual heat of electric power plant |
| CN108506991A (en) * | 2018-05-16 | 2018-09-07 | 北京国电蓝天节能科技开发有限公司 | A kind of steam turbine exhaust heat upgrading heating system |
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