CN102877903A - Heat supply and power generation system of low-temperature heat source without direct working capability - Google Patents
Heat supply and power generation system of low-temperature heat source without direct working capability Download PDFInfo
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- CN102877903A CN102877903A CN2012104031103A CN201210403110A CN102877903A CN 102877903 A CN102877903 A CN 102877903A CN 2012104031103 A CN2012104031103 A CN 2012104031103A CN 201210403110 A CN201210403110 A CN 201210403110A CN 102877903 A CN102877903 A CN 102877903A
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Abstract
The invention relates to a heat supply and power generation system, in particular to a heat supply and power generation system of a low-temperature heat source without direct working capability so as to solve the problem that an existing heat utilization and recovery system of a low-temperature heat source without direct working capability is wasteful in high-grade energy, single in energy utilization mode and low in energy utilization rate. The system comprises a first expander, a first heat exchanger, a first condenser, a first preheater, a first superheater, a second expander, a second heat exchanger, a second condenser, a second preheater, a second superheater, a boosting pump, a first power generator, a second power generator and low-temperature heat source circulation pipelines, the first expander is connected with the first power generator, the first superheater and the second superheater are communicated in a series connection manner through the low-temperature heat source circulation pipelines, and the second superheater is communicated with the first preheater and the second preheater in a series connection manner by the aid of the low-temperature heat source circulation pipelines or is respectively communicated with the first preheater and the second preheater in a series connection manner through the low-temperature heat source circulation pipelines. The system is used for heat supply and power generation.
Description
Technical field
The present invention relates to a kind of heat generating system that supplies, be specifically related to a kind of system that carries out the heat supply generating without direct acting ability low-temperature heat source that utilizes.
Background technique
Current energy shortage, China is main or take coal as the main energy, still coal-fired energy utilization rate is low, and particularly the heat utilization rate of low-pressure low-temperature flue gas or exhaust steam thermal source is lower, causes waste serious, so that the consumption of coal amount increases greatly.Mainly there are following problem in the heat energy utilization of present already present low-temperature heat source and reclaiming system or technique: one, most of low-temperature heat source contains some high-grade energy such as useless flue gas or exhaust steam, but can not directly be used for doing work, become the extensive bottleneck that utilizes of heat energy without the low-temperature heat source of direct acting ability; Two, the energy recovery form of the low-temperature heat source of the direct acting ability of nothing mainly is simply to be used for heat supply, and purposes is single, and the part high-grade energy is wasted; Three, the heat reclaiming system of the low-temperature heat source of the direct acting ability of most of nothing is recycled with the low grade heat energy form, and efficiency of energy utilization is not high; Four, many traditional heat medium temperatures of draining without the heat reclaiming system of direct acting ability low-temperature heat source are still very high, and a large amount of heat energy waste.Therefore, rationally utilize and reclaim without the direct heat energy tool of the low-temperature heat source of acting ability and be of great significance.
Summary of the invention
The objective of the invention is for solving existing without directly there are the high-grade energy waste in heat energy utilization and the reclaiming system of the low-temperature heat source of acting ability, energy utilizes form single, the problem that capacity usage ratio is lower, and then the heat generating system that supplies that provides a kind of nothing directly to do work the ability low-temperature heat source.
The present invention addresses the above problem the technological scheme of taking to be: what a kind of nothing of the present invention was directly done work the ability low-temperature heat source comprises the first decompressor for heat generating system, First Heat Exchanger, the first condenser, the first preheater, the first superheater, the second decompressor, the second heat exchanger, the second condenser, the second preheater, the second superheater, suction booster, the first generator, the second generator and low-temperature heat source pipeline, the cycle fluid outlet end of the first decompressor is communicated with the first cycle fluid entry end of First Heat Exchanger, the first cycle fluid outlet end of First Heat Exchanger is communicated with the cycle fluid entry end of the first condenser, the cycle fluid outlet end of the first condenser is communicated with the cycle fluid entry end of the first preheater by suction booster, the cycle fluid outlet end of the first preheater is communicated with the second cycle fluid entry end of First Heat Exchanger, the second cycle fluid outlet end of First Heat Exchanger is communicated with the overheated cycle fluid entry end of the first superheater, the overheated cycle fluid outlet end of the first superheater is communicated with the acting cycle fluid entry end of the first decompressor, and the first decompressor is connected with the first generator;
The cycle fluid outlet end of the second decompressor is communicated with the 3rd cycle fluid entry end of the second heat exchanger, the 3rd cycle fluid outlet end of the second heat exchanger is communicated with the cycle fluid entry end of the second condenser, the cycle fluid outlet end of the second condenser is communicated with the cycle fluid entry end of the second preheater by suction booster, the cycle fluid outlet end of the second preheater is communicated with the 4th cycle fluid entry end of the second heat exchanger, the 4th cycle fluid outlet end of the second heat exchanger is communicated with the overheated cycle fluid entry end of the second superheater, the overheated cycle fluid outlet end of the second superheater is communicated with the acting cycle fluid entry end of the second decompressor, and the second decompressor is connected with the second generator;
The first superheater and the second superheater are communicated with by the series connection of low-temperature heat source pipeline, the second superheater by the low-temperature heat source pipeline connect with the first preheater and the second preheater be communicated with or the second superheater by the connection of connecting with the first preheater and the second preheater respectively of low-temperature heat source pipeline, the low-temperature heat source pipeline is for realization Heating Cyclic working medium.
The invention has the beneficial effects as follows: one, the present invention is based on different transfer of heat principle and decompressor pressure reduction acting principle, low-temperature heat source is contained that a part of high-grade energy such as useless flue gas or exhaust steam, pass to the acting cycle fluid by the temperature difference, the acting cycle fluid has been realized the recycling of this a part of high-grade energy again by the pressure reduction generating of externally doing work.Two, energy recovery institute generated energy belongs to the high-grade energy, and is of many uses, improved the utilization efficiency of heat energy of whole system.Three, the present invention can reduce the outlet temperature of heating agent to the utmost by the plural serial stage heat exchange of low-temperature heat source heating agent, further increases the recovery ratio of 5% to 20% heat energy.Four, the present invention adopts two-stage for thermal electric generator, and comprehensive electric generating efficient will improve 20% to 40% than single-stage for heat generating system.
Description of drawings
Fig. 1 is the overall structure schematic diagram that the present invention connects with the first preheater and the second preheater and is communicated with by the low-temperature heat source pipeline for the second superheater of heat generating system, Fig. 2 is the overall structure schematic diagram that supplies heat generating system the second superheater to connect with the first preheater and the second preheater respectively and be communicated with by the low-temperature heat source pipeline of the present invention, Fig. 3 be in the specific embodiment of the present invention two the 3rd heat exchanger connect with the second preheater be communicated with and the hot coal of low-temperature heat source pipeline enter the 3rd heat exchanger with from after the first condenser heat exchange and the heating medium that converges after the second condenser heat exchange carry out heat exchange overall structure schematic diagram, Fig. 4 is that the 3rd heat exchanger is connected with the second preheater and is communicated with and the hot coal of low-temperature heat source pipeline enters the 3rd heat exchanger and carries out heat exchange overall structure schematic diagram from the heating medium after the first condenser heat exchange in the specific embodiment of the present invention three, Fig. 5 be in the specific embodiment of the present invention two the 3rd heat exchanger connect with the first preheater be communicated with and the hot coal of low-temperature heat source pipeline enter the 3rd heat exchanger with from after the first condenser heat exchange and the overall structure schematic diagram that carries out heat exchange of the heating medium that converges after the second condenser heat exchange, Fig. 6 is that the hot coal through the low-temperature heat source pipeline after the first preheater heat exchange enters the 3rd heat exchanger and the overall structure schematic diagram that carries out heat exchange from the heating medium after the first condenser heat exchange in the specific embodiment of the present invention three.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1 and Fig. 2, what a kind of nothing of present embodiment was directly done work the ability low-temperature heat source comprises the first decompressor 1 for heat generating system, First Heat Exchanger 3, the first condenser 5, the first preheater 8, the first superheater 10, the second decompressor 2, the second heat exchanger 4, the second condenser 6, the second preheater 9, the second superheater 11, suction booster 7, the first generator 12, the second generator 16 and low-temperature heat source pipeline 13, the cycle fluid outlet end of the first decompressor 1 is communicated with the first cycle fluid entry end 3-1 of First Heat Exchanger 3, the first cycle fluid outlet end 3-2 of First Heat Exchanger 3 is communicated with the cycle fluid entry end of the first condenser 5, the cycle fluid outlet end of the first condenser 5 is communicated with the cycle fluid entry end of the first preheater 8 by suction booster 7, the cycle fluid outlet end of the first preheater 8 is communicated with the second cycle fluid entry end 3-4 of First Heat Exchanger 3, the second cycle fluid outlet end 3-3 of First Heat Exchanger 3 is communicated with the overheated cycle fluid entry end of the first superheater 10, the overheated cycle fluid outlet end of the first superheater 10 is communicated with the acting cycle fluid entry end of the first decompressor 1, and the first decompressor 1 is connected with the first generator 12;
The cycle fluid outlet end of the second decompressor 2 is communicated with the 3rd cycle fluid entry end 4-1 of the second heat exchanger 4, the 3rd cycle fluid outlet end 4-2 of the second heat exchanger 4 is communicated with the cycle fluid entry end of the second condenser 6, the cycle fluid outlet end of the second condenser 6 is communicated with the cycle fluid entry end of the second preheater 9 by suction booster 7, the cycle fluid outlet end of the second preheater 9 is communicated with the 4th cycle fluid entry end 4-4 of the second heat exchanger 4, the 4th cycle fluid outlet end 4-3 of the second heat exchanger 4 is communicated with the overheated cycle fluid entry end of the second superheater 11, the overheated cycle fluid outlet end of the second superheater 11 is communicated with the acting cycle fluid entry end of the second decompressor 2, and the second decompressor 2 is connected with the second generator 16;
The first superheater 10 and the second superheater 11 are communicated with by 13 series connection of low-temperature heat source pipeline, the second superheater 11 by low-temperature heat source pipeline 13 connect with the first preheater 8 and the second preheater 9 be communicated with or the second superheater 11 by low-temperature heat source pipeline 13 connection of connecting with the first preheater 8 and the second preheater 9 respectively, low-temperature heat source pipeline 13 is for realization Heating Cyclic working medium.
The superheater of present embodiment utilizes the basic principle of different transfer of heat, described decompressor utilizes the basic principle of pressure reduction acting, realize cycle fluid externally acting under the state of relative low temperature high pressure, be used for generating electricity, described First Heat Exchanger and the second heat exchanger utilize self cycle heat exchange so that behind the decompressor cycle fluid carry out the cooling first time, and secondary preheating enters the cycle fluid before the superheater, so that externally acting amount of decompressor increases, described condenser is used for secondary cool cycles working medium, add the heating mediums such as hot tap-water, be used for realizing that the heat energy that reclaims low-temperature heat source is used for heat supply, the described suction booster cycle fluid pressure that is used for raising, described preheater are used for warm-up cycle working medium one time.
The cycle fluid of present embodiment is HFC-134a (R134a) or propane, and this cycle fluid pressure under the relative low temperature condition is high, and the acting ability is strong, and condensing temperature is low.The cycle fluid of present embodiment also can adopt other working medium.
This implements the case tube heat exchanger that described First Heat Exchanger and the optional usefulness of the second heat exchanger have fin tube.
The first superheater, the second superheater, the second preheater and the first preheater are communicated with by 13 series connection of low-temperature heat source pipeline in the present embodiment, realize the ladder utilization of the heat of low-temperature heat source, low-temperature heat source utilizes the temperature difference to increase, perhaps the series connection of the first superheater and the second superheater is communicated with, the connection of connecting with the second preheater and the first preheater respectively of the second superheater, so arrange, conveniently adjusted quality and the heat that enters the heating agent of the first preheater and the second preheater, low-temperature heat source utilize the temperature difference to increase.
Embodiment two: present embodiment is described in conjunction with Fig. 3 and Fig. 5, present embodiment is described also to comprise the 3rd heat exchanger 15 for heat generating system, the 3rd heat exchanger 15 is by low-temperature heat source pipeline 13 connection of connecting with the first preheater 8 or the second preheater 9, and the heat supply working medium outlet end 6-1 of the heat supply working medium outlet end 5-1 of the first condenser 5 and the second condenser 6 all is communicated with the heat supply working medium entrance point 15-1 of the 3rd heat exchanger 15.Through the low temperature heating agent after the first preheater 8 or 9 heat exchange of the second preheater enter by low-temperature heat source pipeline 13 the 3rd heat exchanger 15 with from 5 heat exchange of the first condenser after and the heat supply working medium that converges after 6 heat exchange of the second condenser carry out heat exchange, namely the second condenser 6 and the first condenser 5 are connected in parallel by the heat supply working medium pipeline and are connected in series with the 3rd heat exchanger 15 more afterwards.So arrange, set up the 3rd heat exchanger, when the low-pressure low-temperature heat medium temperature of draining still is higher than temperature from the first condenser or the second condenser heat supply working medium (such as water) out, then can also further recycle by the 3rd heat exchanger this part heat energy of low-temperature heat source, form by heat supply has reclaimed the residue low-grade energy, realized the cascade utilization of energy, various informativeization of heat energy recycle.Other is identical with embodiment one.
Embodiment three: in conjunction with Fig. 4 and Fig. 6 present embodiment is described, the heat supply working medium outlet end 5-1 of the first condenser 5 of present embodiment is communicated with the heat supply working medium entrance point 15-1 of the 3rd heat exchanger 15.The low-temperature heat source heating agent of present embodiment after the first preheater 8 or 9 heat exchange of the second preheater enters the 3rd heat exchanger 15 by low-temperature heat source pipeline 13, and with first by the second condenser 6, carry out heat exchange by the heat supply working medium behind the first condenser 5 two-step heatings again, namely the second condenser 6, the first condenser 5, the 3rd heat exchanger 15 are connected in series by the heat supply working medium pipeline.So arrange, can reduce because different temperatures heating medium (such as water) mixes the exergy loss that causes, the utilization efficiency of heat energy of Effective Raise low-temperature heat source, the first condenser 5 and 6 series connection of the second condenser are communicated with in the present embodiment.Other is identical with embodiment two.
Working procedure
Cycle fluid enters suction booster after the first condenser or the second condenser heat release are cooled to liquid state, the rising of being forced to property of pressure, then enter separately the first preheater or the second preheater by a preheating, then enter separately First Heat Exchanger or the second heat exchanger by secondary preheating, enter separately again the first superheater or the second superheater heat absorption and overheated, change the superheated vapor of high pressure into, pressure and temperature all improves greatly, continue separately to enter the first decompressor or the second decompressor, promote the generating of externally doing work of the first decompressor and the first generator or the second decompressor and the second generator, pressure and temperature descends, then, again enter First Heat Exchanger separately or the second heat exchanger is once cooled off, get back to the first condenser at last or the second condenser is cooled to liquid state by secondary, so finish a circulation and proceed; The technological process of low-temperature heat source heating agent is that the low-temperature heat source heating agent enters the first superheater and the second superheater heat release successively, temperature reduces, then, enter the first preheater or the again heat release of the second preheater, temperature is reduced to the low-temperature heat source heating agent without the heat energy recoverable or have part recoverable heat energy and further recycle by the 3rd heat exchanger, drains at last; The heat supply working medium technological process is: heat supply working medium (such as water) is heated by the first condenser or the second condenser, perhaps further is heated by the 3rd heat exchanger, then, is used for domestic hot-water supply or building heat supplying.
Claims (3)
- A nothing directly do work the ability low-temperature heat source for heat generating system, it is characterized in that: the described heat generating system that supplies comprises the first decompressor (1), First Heat Exchanger (3), the first condenser (5), the first preheater (8), the first superheater (10), the second decompressor (2, the second heat exchanger (4), the second condenser (6), the second preheater (9), the second superheater (11), suction booster (7), the first generator (12), the second generator (16) and low-temperature heat source pipeline (13), the cycle fluid outlet end of the first decompressor (1) is communicated with the first cycle fluid entry end (3-1) of First Heat Exchanger (3), the first cycle fluid outlet end (3-2) of First Heat Exchanger (3) is communicated with the cycle fluid entry end of the first condenser (5), the cycle fluid outlet end of the first condenser (5) is communicated with the cycle fluid entry end of the first preheater (8) by suction booster (7), the cycle fluid outlet end of the first preheater (8) is communicated with the second cycle fluid entry end (3-4) of First Heat Exchanger (3), the second cycle fluid outlet end (3-3) of First Heat Exchanger (3) is communicated with the overheated cycle fluid entry end of the first superheater (10), the overheated cycle fluid outlet end of the first superheater (10) is communicated with the acting cycle fluid entry end of the first decompressor (1), and the first decompressor (1) is connected with the first generator (12);The cycle fluid outlet end of the second decompressor (2) is communicated with the 3rd cycle fluid entry end (4-1) of the second heat exchanger (4), the 3rd cycle fluid outlet end (4-2) of the second heat exchanger (4) is communicated with the cycle fluid entry end of the second condenser (6), the cycle fluid outlet end of the second condenser (6) is communicated with the cycle fluid entry end of the second preheater (9) by suction booster (7), the cycle fluid outlet end of the second preheater (9) is communicated with the 4th cycle fluid entry end (4-4) of the second heat exchanger (4), the 4th cycle fluid outlet end (4-3) of the second heat exchanger (4) is communicated with the overheated cycle fluid entry end of the second superheater (11), the overheated cycle fluid outlet end of the second superheater (11) is communicated with the acting cycle fluid entry end of the second decompressor (2), and the second decompressor (2) is connected with the second generator (16);The first superheater (10) and the second superheater (11) are communicated with by low-temperature heat source pipeline (13) series connection, the second superheater (11) connect with the first preheater (8) and the second preheater (9) by low-temperature heat source pipeline (13) and is communicated with or the second superheater (11) passes through low-temperature heat source pipeline (13) connection of connecting with the first preheater (8) and the second preheater (9) respectively, and low-temperature heat source pipeline (13) is for realization Heating Cyclic working medium.
- A kind of nothing according to claim 1 directly do work the ability low-temperature heat source for heat generating system, it is characterized in that: the described heat generating system that supplies also comprises the 3rd heat exchanger (15), the 3rd heat exchanger (15) is by low-temperature heat source pipeline (13) connection of connecting with the first preheater (8) or the second preheater (9), and the heat supply working medium outlet end (5-1) of the first condenser (5) and the heat supply working medium outlet end (6-1) of the second condenser (6) all are communicated with the heat supply working medium entrance point (15-1) of the 3rd heat exchanger (15).
- A kind of nothing according to claim 2 directly do work the ability low-temperature heat source for heat generating system, it is characterized in that: the heat supply working medium outlet end (5-1) of the first condenser (5) is communicated with the heat supply working medium entrance point (15-1) of the 3rd heat exchanger (15).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104031103A CN102877903A (en) | 2012-10-22 | 2012-10-22 | Heat supply and power generation system of low-temperature heat source without direct working capability |
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| CN2012104031103A CN102877903A (en) | 2012-10-22 | 2012-10-22 | Heat supply and power generation system of low-temperature heat source without direct working capability |
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| CN2012104031103A Pending CN102877903A (en) | 2012-10-22 | 2012-10-22 | Heat supply and power generation system of low-temperature heat source without direct working capability |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106643021A (en) * | 2016-11-09 | 2017-05-10 | 南京航空航天大学 | Co-production electric xylitol concentrating and crystal drying system and method |
| CN106705020A (en) * | 2016-12-30 | 2017-05-24 | 王运举 | Self-heat-absorption type heat exchanger combination |
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2012
- 2012-10-22 CN CN2012104031103A patent/CN102877903A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106643021A (en) * | 2016-11-09 | 2017-05-10 | 南京航空航天大学 | Co-production electric xylitol concentrating and crystal drying system and method |
| CN106705020A (en) * | 2016-12-30 | 2017-05-24 | 王运举 | Self-heat-absorption type heat exchanger combination |
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Application publication date: 20130116 |