CN102200117A - System and method for recycling waste heat of cooling circulated water of air compression station - Google Patents
System and method for recycling waste heat of cooling circulated water of air compression station Download PDFInfo
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- CN102200117A CN102200117A CN2011100757662A CN201110075766A CN102200117A CN 102200117 A CN102200117 A CN 102200117A CN 2011100757662 A CN2011100757662 A CN 2011100757662A CN 201110075766 A CN201110075766 A CN 201110075766A CN 102200117 A CN102200117 A CN 102200117A
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- air compressor
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- pump assembly
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- heat pump
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 238000001816 cooling Methods 0.000 title claims abstract description 62
- 239000002918 waste heat Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004064 recycling Methods 0.000 title abstract 3
- 230000006835 compression Effects 0.000 title abstract 2
- 238000007906 compression Methods 0.000 title abstract 2
- 238000010521 absorption reaction Methods 0.000 claims abstract description 39
- 230000003020 moisturizing effect Effects 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 230000005619 thermoelectricity Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 238000011084 recovery Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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Abstract
The invention discloses a system and a method for recycling waste heat of cooling circulated water of an air compression station. The system comprises an upper computer, a distributed control system (DCS) control cabinet, a cooling circulated water pipeline of an air compressor, a water charging pipeline of a boiler deaerator, an absorption heat pump unit and a cooling tower pipeline. The method for recycling the waste heat comprises the following steps of: extracting the waste heat of the cooling circulated water of the air compressor by the absorption heat pump unit to heat the boiler deaerator for water charging; and delivering redundant waste heat to a cooling tower for cooling so as to ensure the normal operation of the air compressor. By the system and the method, the waste heat of the cooling circulated water of the air compressor can be completely or partially recycled according to heat supply demand to achieve the purposes of remarkably saving energy and water resources.
Description
Technical field
The invention belongs to low temperature exhaust heat recovery technology field, be specifically related to a kind of air compressor plant cooling circulating water residual neat recovering system and method.
Background technique
The air compressor plant cooling circulating water is because its temperature is lower, and its temperature and outdoor temperature are suitable when generally advancing air compressor, and temperature raises 5-10 ℃ approximately when going out air compressor, so this low temperature exhaust heat is difficult to adopt traditional heat exchanging tube heat exchange method to reclaim.Though domesticly at present reclaim the technology of low temperature exhaust heat at utilization and extention absorption heat pump progressively, the relevant report of utilizing absorption heat pump to reclaim the steam-condenser of thermal power plants cooling water heat is also arranged, do not see the systematicness of air compressor plant cooling circulating water heat recovery is used.Therefore, domestic needleless report that air compressor plant cooling circulating water low temperature exhaust heat is reclaimed still at present.
On the other hand, the cooling circulating water of domestic existing air compressor plant need cool off through cooling tower, to realize the circulation cooling to air compressor, has so not only wasted the waste heat in the cooling circulating water of air compressor plant, and cooling tower also will consume a large amount of electric energy and moisturizing; Thermoelectricity plant needs continuously to replenish cold water again in order to guarantee its steam supply in boiler feed simultaneously, is heated into steam via boiler again, thereby causes the huge waste of the energy and water resources.
Summary of the invention
The present invention is in order to overcome the deficiencies in the prior art, the occasion that has air compressor plant and thermoelectricity plant is at the same time utilized a kind of residual neat recovering system, and air compressor plant cooling circulating water waste heat is extracted, in order to the moisturizing of heating boiler oxygen-eliminating device, to reach the purpose of remarkable energy saving and water resources.
For achieving the above object, the present invention adopts following technological scheme.
Air compressor plant cooling circulating water residual neat recovering system provided by the invention, the DCS that comprise upper-position unit, links to each other (Distributed Control System with described upper-position unit, be Distributed Control System) control cabinet, the air compressor cool cycles water lines, the boiler feed water pipe that link to each other respectively with described DCS control cabinet, the absorption type heat pump assembly; Described absorption type heat pump assembly also links to each other with described upper-position unit; Described absorption type heat pump assembly also links to each other, links to each other with described boiler feed water pipe by the hot water pipe with described air compressor cool cycles water lines by the heat source water pipeline.
Also be connected with the steam pipework of input steam on the described absorption type heat pump assembly.
On described air compressor cool cycles water lines, boiler feed water pipe, heat source water pipeline, hot water pipe, the steam pipework thermometer, pressure gauge are installed; Steam reducing valve, steam regulation valve, flowmeter, heat integrating instrument also are installed on the described steam pipework; Flowmeter, heat integrating instrument also are installed on the described hot water pipe; On described air compressor cool cycles water lines, the heat source water pipeline electronic water regulating valve is installed also.
Described air compressor cool cycles water lines also links to each other with the cooling tower pipeline.
Thermometer, pressure gauge, electronic water regulating valve are installed on the described cooling tower pipeline.
The exhaust heat recovering method of employing said system of the present invention comprises:
(1) adopts described absorption type heat pump assembly, the waste heat of air compressor cooling circulating water is extracted, in order to the moisturizing of heating boiler oxygen-eliminating device.The saturated vapour that described waste heat leaching process need have certain pressure, temperature drives, and required steam is imported described absorption type heat pump assembly by steam pipework.
Described exhaust heat recovering method also comprises:
(2) utilize described upper-position unit, monitor described air compressor cool cycles water lines, the absorption type heat pump assembly, the pressure of boiler feed water pipe, temperature, flow indicator, and according to boiler feed refill flow and the inlet temperature of air compressor cooling circulating water through described absorption type heat pump assembly extraction cooled temperature of waste heat and needs heating, automatically regulate the endless form between air compressor cooling circulating water and the absorption type heat pump assembly heat source water, thereby regulate air compressor cooling circulating water waste heat extracted amount automatically, and unnecessary air compressor cooling circulating water waste heat is delivered to described cooling tower cooling.
(3) utilize described DCS control cabinet, realize the communication between described upper-position unit and described pressure gauge, thermometer, flowmeter, steam reducing valve, steam regulation valve, heat integrating instrument, the electronic water regulating valve, and carry out the control command that described upper-position unit sends, utilize described ipc monitor, steam regulation pressure, as required the steam regulation flow.
Wherein, the described endless form in the described method (2) comprises the circulation of full cut-off formula, the open cycle of part enclosed part.In the described full cut-off formula endless form, the air compressor cooling circulating water all enters described absorption type heat pump assembly; In the described part enclosed part open cycle mode, air compressor cool cycles water section enters described absorption heat pump machine and enters cooling tower; The switching of described endless form realizes by the automatic adjusting to the electronic water regulating valve on the air compressor cool cycles water lines.
Advantage of the present invention and beneficial effect are: the present invention can be according to the waste heat in all or part of recovery air compressor of the boiler feed usefulness heat demand cooling circulating water, and the intelligent circulation control between automatic or manual realization residual neat recovering system and air compressor cool cycles water lines, the boiler feed water pipe fully, under the prerequisite that guarantees the normal cooling effect of air compressor, save the coal-fired consumption of boiler, energy-saving effect is remarkable, and fractional energy savings can reach 30-40%.
Description of drawings
Fig. 1 is an air compressor plant cooling circulating water residual neat recovering system structural representation of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments the present invention is described in detail, but not as limitation of the present invention.
Figure 1 shows that air compressor plant cooling circulating water of the present invention heat recovery and utilize the system architecture schematic representation, air compressor cool cycles water lines, boiler feed water pipe that described air compressor plant cooling circulating water residual neat recovering system comprises upper-position unit, the DCS control cabinet that links to each other with described upper-position unit, links to each other respectively with described DCS control cabinet, the absorption type heat pump assembly; Described absorption type heat pump assembly also links to each other with described upper-position unit; Described absorption type heat pump assembly also links to each other, links to each other with described boiler feed water pipe by the hot water pipe with described air compressor cool cycles water lines by the heat source water pipeline.
Described air compressor cool cycles water lines also links to each other with the cooling tower pipeline.
Also be connected with the steam pipework (not shown) of input steam on the described absorption type heat pump assembly.
On described air compressor cool cycles water lines, boiler feed water pipe, heat source water pipeline, hot water pipe, the steam pipework thermometer, pressure gauge are installed; Steam reducing valve, steam regulation valve, flowmeter, heat integrating instrument also are installed on the described steam pipework; Flowmeter, heat integrating instrument also are installed on the described hot water pipe; On described air compressor cool cycles water lines, the heat source water pipeline electronic water regulating valve (not shown) is installed also.
With Jiangsu thermoelectricity plant is example, in conjunction with Fig. 1, working principle of the present invention and method is done a detailed description.
This thermoelectricity plant outwards provides steam simultaneously in generating, per hour needs 90 tons of boiler feed moisturizing (well water+water of condensation) average out to approximately, and boiler feed moisturizing initial temperature is about 50 ℃.
This thermoelectricity plant also has an air compressor plant, and wherein the air compressor cool cycles water yield is about 160 tons/hour, and the temperature difference is about 10 ℃ before and after the air compressor cooling circulating water turnover air compressor.
Air compressor cooling circulating water residual heat resources and boiler feed moisturizing heat demand according to this factory utilize residual neat recovering system of the present invention, implement heat recovery scheme of the present invention.According to boiler feed rate of water make-up and moisturizing initial temperature, reclaim air compressor cooling circulating water waste heat as required, in order to 50 ℃ boiler replenishing water is heated to 80 ℃.Concrete working principle of described system and process are as follows:
Described system is when proper functioning, upper-position unit is monitored in real time to temperature, pressure in the absorption type heat pump assembly heat source water pipeline in the system, temperature, flow, pressure to the steam pipework that enters the absorption type heat pump assembly are monitored in real time, and read the heat history value Q1 (being the calorie value that the absorption type heat pump assembly consumes) of heat integrating instrument in real time; Upper-position unit is monitored in real time to the hot water pipe's of absorption type heat pump assembly heat outputting water temperature, flow, pressure, and reads the calorie value Q2 of absorption type heat pump assembly accumulation output in the heat integrating instrument in real time.According to law of conservation of energy, the residual heat value that the Q2=Q1+ absorption heat pump extracts from heat source water.Host computer monitoring software calculates the fractional energy savings of system according to the survey data in real time, and formula is as follows: energy-saving efficiency=(Q2-Q1)/Q2.
Owing to boiler feed moisturizing demand is that load variations along with thermoelectricity plant changes, its moisturizing also changes at any time with heat demand, so the endless form between air compressor cooling circulating water and the absorption type heat pump assembly heat source water is also regulated automatically or switched thereupon.For example, by day, thermoelectricity plant adopts full cut-off formula endless form owing to big with the heat demand amount; At night, thermoelectricity plant is assumed to be 60% of load on daytime because load reduces, and then the rate of water make-up of boiler feed also will be reduced to about 60% of daytime, also is reduced to 60% with heat demand; Because absorption type heat pump assembly working efficiency is substantially invariable, therefore the waste heat amount of extracting from the air compressor cooling circulating water also is about 60% of daytime.If air compressor cool cycles water lines and absorption type heat pump assembly still keep closed cycle, then the temperature of air compressor cooling circulating water can raise gradually, finally can't guarantee the cooling effect of air compressor.In this case, the native system upper-position unit can enter the temperature of air compressor ingress according to the air compressor cooling circulating water, by the corresponding electronic water regulating valve on DCS control cabinet real-time regulated air compressor cool cycles water lines, absorption type heat pump assembly heat source water pipeline, the cooling tower pipeline, thereby adjust the water yield that the air compressor cooling circulating water enters the absorption type heat pump assembly, send the exhaustless waste heat of absorption type heat pump assembly back to the cooling tower cooling again, thereby guarantee the cooling effect of air compressor.
In the present embodiment, the actual motion effect of system of the present invention is: system of the present invention is under the prerequisite of the cooling effect that guarantees air compressor, extract the waste heat in the air compressor cooling circulating water, supply with boiler feed after the boiler feed moisturizing is heated to 80 ℃-85 ℃ from 50 ℃, described system to the crucial operating index of thermoelectricity plant such as degree of vacuum, boiler feed water level, pressure etc. without any influence.The energy saving of system rate is about 35%, and thermoelectricity plant's overall thermal efficient improves above 1%, and every day, total coal conservation was about 6 tons (this thermoelectricity plant is 5500 kilocalories electricity coals with coal every day), annual about 2200 tons of the mark coal of saving, and effects of energy saving and emission reduction is fairly obvious.
Claims (8)
1. air compressor plant cooling circulating water residual neat recovering system, it is characterized in that, air compressor cool cycles water lines, boiler feed water pipe that described system comprises upper-position unit, the DCS control cabinet that links to each other with described upper-position unit, links to each other respectively with described DCS control cabinet, the absorption type heat pump assembly; Described absorption type heat pump assembly also links to each other with described upper-position unit; Described absorption type heat pump assembly also links to each other, links to each other with described boiler feed water pipe by the hot water pipe with described air compressor cool cycles water lines by the heat source water pipeline.
2. the system as claimed in claim 1 is characterized in that, also is connected with the steam pipework of input steam on the described absorption type heat pump assembly.
3. system as claimed in claim 2 is characterized in that, on described air compressor cool cycles water lines, boiler feed water pipe, heat source water pipeline, hot water pipe, the steam pipework thermometer, pressure gauge is installed; Steam reducing valve, steam regulation valve, flowmeter, heat integrating instrument also are installed on the described steam pipework; Flowmeter, heat integrating instrument also are installed on the described hot water pipe; On described air compressor cool cycles water lines, the heat source water pipeline electronic water regulating valve is installed also.
4. system as claimed in claim 3 is characterized in that, described air compressor cool cycles water lines also links to each other with the cooling tower pipeline.
5. system as claimed in claim 4 is characterized in that, thermometer, pressure gauge, electronic water regulating valve are installed on the described cooling tower pipeline.
6. adopt exhaust heat recovering method, it is characterized in that described method comprises as system as described in the claim 5:
(1) utilizes described absorption type heat pump assembly, the waste heat of air compressor cooling circulating water is extracted, in order to the moisturizing of heating boiler oxygen-eliminating device.
7. exhaust heat recovering method as claimed in claim 6 is characterized in that, described method also comprises:
(2) utilize described upper-position unit, monitor described air compressor cool cycles water lines, the absorption type heat pump assembly, the pressure of boiler feed water pipe, temperature, flow indicator, and according to boiler feed refill flow and the inlet temperature of air compressor cooling circulating water through described absorption type heat pump assembly extraction cooled temperature of waste heat and needs heating, automatically regulate the endless form between air compressor cooling circulating water and the absorption type heat pump assembly heat source water, thereby regulate air compressor cooling circulating water waste heat extracted amount automatically, and unnecessary air compressor cooling circulating water waste heat is delivered to described cooling tower cooling;
(3) utilize described DCS control cabinet, realize the communication between described upper-position unit and described pressure gauge, thermometer, flowmeter, steam reducing valve, steam regulation valve, heat integrating instrument, the electronic water regulating valve, and carry out the control command that described upper-position unit sends, utilize described ipc monitor, steam regulation pressure, as required the steam regulation flow.
8. exhaust heat recovering method as claimed in claim 7 is characterized in that, the described endless form in the described method (2) comprises the circulation of full cut-off formula, the open cycle of part enclosed part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100757662A CN102200117A (en) | 2011-03-28 | 2011-03-28 | System and method for recycling waste heat of cooling circulated water of air compression station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100757662A CN102200117A (en) | 2011-03-28 | 2011-03-28 | System and method for recycling waste heat of cooling circulated water of air compression station |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889573A (en) * | 2012-09-24 | 2013-01-23 | 天津大学 | Process system for preparing deoxygenated water for boiler by utilizing high temperature heat pump system |
| CN103047113A (en) * | 2013-01-11 | 2013-04-17 | 佛山市海天调味食品股份有限公司 | Heat energy recovery system for air compressor |
| CN103398011A (en) * | 2013-07-10 | 2013-11-20 | 西安工程大学 | Waste heat recycling system of oil injection screw air compressor |
| CN105840247A (en) * | 2016-05-11 | 2016-08-10 | 华电电力科学研究院 | System for driving air compressor by using recycled residual heat and running method of system |
| CN105840261A (en) * | 2016-05-11 | 2016-08-10 | 华电电力科学研究院 | System for recycling waste heat of air compressor for power generation and running method of system |
| CN108057482A (en) * | 2017-11-20 | 2018-05-22 | 广州雄迪食品有限公司 | Glutinous rice flour production line and its drying device |
| CN109838947A (en) * | 2019-01-24 | 2019-06-04 | 中船第九设计研究院工程有限公司 | A kind of coordinated control system based on PLC automatic control |
| CN110887270A (en) * | 2019-10-30 | 2020-03-17 | 鞍钢股份有限公司 | Multistage utilization system and method for waste heat of air compressor |
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| CN201162651Y (en) * | 2007-11-27 | 2008-12-10 | 贵阳铝镁设计研究院 | Recirculated cooling water supplying and returning device of air compressor group |
| CN201242274Y (en) * | 2008-06-05 | 2009-05-20 | 江永铭 | Energy-saving hot-water set capable of recovering and using air compressor waste heat |
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| CN101907084A (en) * | 2009-06-08 | 2010-12-08 | 上海本家空调系统有限公司 | Heat recovery system for air compressor |
| CN202132212U (en) * | 2011-03-28 | 2012-02-01 | 北京中科华誉能源投资管理有限公司 | Cooling-circulating-water waste heat recovery system for air compression station |
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| JP2003021419A (en) * | 2001-07-03 | 2003-01-24 | Sekisui Chem Co Ltd | Absorption heat pump |
| CN201162651Y (en) * | 2007-11-27 | 2008-12-10 | 贵阳铝镁设计研究院 | Recirculated cooling water supplying and returning device of air compressor group |
| CN201242274Y (en) * | 2008-06-05 | 2009-05-20 | 江永铭 | Energy-saving hot-water set capable of recovering and using air compressor waste heat |
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| DE202009007803U1 (en) * | 2009-06-04 | 2010-10-21 | Samak, Nabil | Braking (or coasting) - energy use in braking thrust and / or only recovery by pump pressure braking, in compression heat (which is multiplied by the heat pump effect) as a heat source for Anergie drive circuits (inter alia, the "NZPG") |
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| CN201560812U (en) * | 2009-10-30 | 2010-08-25 | 北京联合优发能源技术有限公司 | Cogeneration low temperature heat energy recovery device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889573A (en) * | 2012-09-24 | 2013-01-23 | 天津大学 | Process system for preparing deoxygenated water for boiler by utilizing high temperature heat pump system |
| CN103047113A (en) * | 2013-01-11 | 2013-04-17 | 佛山市海天调味食品股份有限公司 | Heat energy recovery system for air compressor |
| CN103047113B (en) * | 2013-01-11 | 2015-08-12 | 佛山市海天调味食品股份有限公司 | A kind of heat energy recovery system for air compressor |
| CN103398011A (en) * | 2013-07-10 | 2013-11-20 | 西安工程大学 | Waste heat recycling system of oil injection screw air compressor |
| CN103398011B (en) * | 2013-07-10 | 2016-01-20 | 西安工程大学 | Waste heat |
| CN105840247A (en) * | 2016-05-11 | 2016-08-10 | 华电电力科学研究院 | System for driving air compressor by using recycled residual heat and running method of system |
| CN105840261A (en) * | 2016-05-11 | 2016-08-10 | 华电电力科学研究院 | System for recycling waste heat of air compressor for power generation and running method of system |
| CN108057482A (en) * | 2017-11-20 | 2018-05-22 | 广州雄迪食品有限公司 | Glutinous rice flour production line and its drying device |
| CN109838947A (en) * | 2019-01-24 | 2019-06-04 | 中船第九设计研究院工程有限公司 | A kind of coordinated control system based on PLC automatic control |
| CN110887270A (en) * | 2019-10-30 | 2020-03-17 | 鞍钢股份有限公司 | Multistage utilization system and method for waste heat of air compressor |
| CN110887270B (en) * | 2019-10-30 | 2021-07-02 | 鞍钢股份有限公司 | A system and method for multi-stage utilization of waste heat from an air compressor |
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Application publication date: 20110928 |