CN205225352U - High -efficient recovery unit of combined heat and power generation system energy - Google Patents
High -efficient recovery unit of combined heat and power generation system energy Download PDFInfo
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- CN205225352U CN205225352U CN201521029370.4U CN201521029370U CN205225352U CN 205225352 U CN205225352 U CN 205225352U CN 201521029370 U CN201521029370 U CN 201521029370U CN 205225352 U CN205225352 U CN 205225352U
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- steam
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- eliminating device
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- accumulator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The utility model discloses a high -efficient recovery unit of combined heat and power generation system energy, including steam boiler blowdown energy recuperation unit and oxygen -eliminating device steam energy recuperation unit, steam boiler blowdown energy recuperation unit includes consecutive steam heat accumulator, low pressure blowdown flash tank and moisturizing pre -heater, and the steam heat accumulator links to each other with steam boiler, link to each other with the oxygen -eliminating device respectively through low pressure blowdown flash tank and moisturizing pre -heater, oxygen -eliminating device steam energy recuperation unit supplies vapour collection case and vapor expansion machine including outward, supplies vapour collection case to receive the steam that comes from steam heat accumulator and generating set outward to with steam partly regard as supply steam outward, during the vapor expansion machine was sent into to another part, drive vapor expansion machine did work, exhaust steam is sent into in the oxygen -eliminating device. The utility model discloses reduce the energy loss of traditional combined heat and power generation system in -process, improved energy recovery efficiency, improved the economic nature of whole combined heat and power generation system operation, system simple structure, practicality to the commonality is strong.
Description
Technical field
The utility model belongs to cogeneration of heat and power field of energy-saving technology, particularly a kind of co-generation unit energy efficient recovering device.
Background technique
Steam required for cogeneration of heat and power technology supply enterprise while producing electric power produces, is one of energy efficiency technology of state key development, now generally uses at home.The co-generation unit energy system sketch of current domestic usual employing as shown in Figure 1.In fig. 1, the high temperature and high pressure steam that steam boiler 2 produces is sent into Turbo-generator Set 1 and is produced electric power, low-pressure pumping steam in the middle of the part of steam turbine, general parameters is the superheated vapor of 0.6 ~ 1.0MPa, send into outer steam supply header 4, by the steam of outer steam supply header 4 externally required for supply enterprise's production; Outer steam supply header 4 sends into oxygen-eliminating device 3 after providing some vapor to be reduced pressure by temperature-decreased pressure reducer 6, the steam required for supply steam boiler 2 feedwater deaeration; The boiler replenishing water of low temperature is heated by oxygen-eliminating device 3 and sends into steam boiler 2 after deoxygenation; The High Temperature High Pressure sewer of steam boiler 2, after low pressure blowdown system 5 dilatation, produces the draining that temperature is about about 100 DEG C, directly enters sewer ditch; The steam that low pressure blowdown system 5 produces is sent into oxygen-eliminating device 3 and is reclaimed heat.
In the co-generation unit of current domestic usual employing, the sewer of steam boiler, be generally the saturation water of the High Temperature High Pressure of 4.0 ~ 10.0MPa, after saxsophone dilatation, produce the low-pressure saturated steam of about 0.2MPa and the sewer of about 100 DEG C, saturated vapour is reclaimed by oxygen-eliminating device, and high-temperature-hot-water then directly discharges, not only waste energy, and capacity usage ratio is also relatively low.In the co-generation unit of current domestic usual employing, steam required for oxygen-eliminating device comes from the steam provided through the post-decompression outer steam supply header of temperature-decreased pressure reducer, steam can lose the effective mechanical energy of the overwhelming majority contained in vain in decompression process, causes the significant wastage of efficiency.
Summary of the invention
The purpose of this utility model is the deficiency of the co-generation unit for above-mentioned existing usual employing, provide the device that a kind of co-generation unit energy efficient reclaims, it has not only effectively reclaimed the energy that boiler blow-off contains, also further reclaim the some mechanical energy contained by deoxygenation steam, effectively reduce hear rate and the power consumption of co-generation unit actual motion.
To achieve these goals, the technological scheme that the utility model is taked is: a kind of co-generation unit energy efficient recovering device, comprises steam boiler blowdown energy recovery unit and oxygen-eliminating device steam energy recovery unit, wherein:
Described steam boiler blowdown energy recovery unit comprises the steam accumulator, low pressure blowdown system and the make-up water preheater that are connected successively, and described steam accumulator is connected with the steam boiler of co-generation unit; The steam produced after the dilatation of described low pressure blowdown system enters into oxygen-eliminating device; Described make-up water preheater is connected with the oxygen-eliminating device of co-generation unit;
Described oxygen-eliminating device steam energy recovery unit comprises outer steam supply header and steam expansion machine, described outer steam supply header receives the steam from steam accumulator and generator set, and a steam part is supplied steam as outer, another part is sent in described steam expansion machine, described steam expansion machine is driven to do work, the output work of steam expansion machine drives the external output power of generator, and the steam of discharge is sent in described oxygen-eliminating device.
Particularly, described steam expansion machine is connected with the admission end of oxygen-eliminating device, enters the steam before oxygen-eliminating device first by after the acting of steam expansion machine, then enters oxygen-eliminating device.
The sewage draining exit of steam boiler is connected with described steam accumulator, and the sewer determining row and platoon of described steam boiler drains into described steam accumulator.
The steam-expelling port of described steam accumulator is connected with described outer steam supply header, and the steam that described steam accumulator produces is admitted to outer steam supply header; The drain opening of described steam accumulator is connected with described low pressure blowdown system, and the draining of described steam accumulator enters low pressure blowdown system.
The drain opening of described low pressure blowdown system is connected with described make-up water preheater, and described make-up water preheater is heating boiler moisturizing simultaneously, and the boiler replenishing water after preheating is sent into oxygen-eliminating device.
Brief description of the process of the present utility model is as follows:
Steam boiler blowdown energy recovery unit flow process: the High Temperature High Pressure sewage that steam boiler is arranged surely, platoon is discharged, is generally the saturation water of the High Temperature High Pressure of 4.0 ~ 10.0MPa, is drained in steam accumulator.Discontinuously determine draining by the accumulation of energy of steam accumulator and pressure stabilization function, convert parameter stability, continuous print blowdown water and steam to.Steam accumulator can produce and the outer saturated vapour close for steam parameter, is sent into outer in steam header by pipeline.The draining of steam accumulator, is generally the saturation water of 0.6 ~ 1.0MPa, is sent in low pressure steam development unit, and low pressure steam development unit produces steam and the saturation water of about 0.2MPa.The steam that low pressure steam development unit produces is sent in the deoxygenation head of oxygen-eliminating device, is used for carrying out deoxygenation to the moisturizing of oxygen-eliminating device.The high warm water discharge of about 120 DEG C that low pressure steam development unit produces enters the low temperature moisturizing of the steam boiler of oxygen-eliminating device by make-up water preheater heating, fully reclaims the heat of sewer.Sewer after make-up water preheater cooling, generally at about 30 DEG C, directly can enter gutter.
Oxygen-eliminating device steam energy recovery unit flow process: the steam come from outer steam supply header, be generally the superheated vapor of 0.6 ~ 1.0MPa, be introduced into steam expansion machine and carry out expansion work, the output work of steam expansion machine can drive generator or other dynamic power machines.The steam that steam expansion machine is discharged, is generally the low pressure steam of about 0.2MPa, is fed in the deoxygenation head of oxygen-eliminating device, be used for carrying out heating and deoxygenation to the water inlet of oxygen-eliminating device.
Beneficial effect: compared with prior art, the utility model tool has the following advantages:
(1) the utility model utilizes accumulation of energy and the current stabilization effect of steam accumulator, and the steam of generation is used for external steam supply or the external output mechanical energy of feeding steam expansion machine; Fully reclaiming by make-up water preheater the heat that sewer contains, for heating the moisturizing of oxygen-eliminating device, reducing the outer steam consumption for steam of oxygen-eliminating device; Utilize steam expansion machine to reclaim the outer effective mechanical energy contained by steam sending into oxygen-eliminating device for steam as much as possible, avoid the waste of efficiency;
(2) in the utility model, fixed, the platoon sewer of steam boiler, drain into steam accumulator, steam accumulator has accumulation of energy and pressure stabilization function, discontinuous boiler blowdown water, especially sewer be can determine, the saturation water and the saturated vapour that export and there is certain pressure and temperature are transformed into, the heat of, platoon sewer fixed by recovered steam boiler, greatly reduces energy loss;
(3) by the admission end of oxygen-eliminating device is connected steam expansion machine, enter the steam of oxygen-eliminating device first by after the acting of steam expansion machine, enter oxygen-eliminating device again, the effective mechanical energy contained by steam utilizing steam expansion machine to reclaim as much as possible to enter oxygen-eliminating device, improve the energy regenerating level entering the steam of oxygen-eliminating device, avoid the waste of efficiency;
(4) by the steam discharge of steam accumulator is connected with outer steam supply header, the steam produced is admitted to outer steam supply header, utilize accumulation of energy and the current stabilization effect of steam accumulator, the steam produced is used for external steam supply or the external output mechanical energy of feeding steam expansion machine, improves the Economy that whole co-generation unit runs further;
(5) by the draining of steam accumulator is entered low pressure blowdown system, the steam that low pressure blowdown system produces, enters oxygen-eliminating device, reclaims heat;
(6) by the draining of low pressure blowdown system is entered make-up water preheater, heating enters the steam boiler low temperature moisturizing of oxygen-eliminating device, reclaims heat;
(7) the utility model structure is simple and practical, and highly versatile, both may be used for the design of new product, also may be used for the transformation to existing system.
Accompanying drawing explanation
Accompanying drawing 1 is conventional co-generation unit energy system sketch, wherein: 1, Turbo-generator Set, and 2, steam boiler, 3, oxygen-eliminating device, 4, outer steam supply header, 5, low pressure blowdown system, 6, temperature-decreased pressure reducer;
Accompanying drawing 2 is a kind of co-generation unit energy efficient recovering device system schematic, wherein: 1, Turbo-generator Set, and 2, steam boiler, 3, oxygen-eliminating device, 4, outer steam supply header, 5, low pressure blowdown system, 6, steam accumulator, 7, make-up water preheater, 8, steam expansion machine.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as to restriction of the present utility model.
As shown in Figure 2, the high temperature and high pressure steam that steam boiler 2 produces is sent into Turbo-generator Set 1 and is produced electric power, low-pressure pumping steam in the middle of the part of steam turbine, general parameters is the superheated vapor of 0.6 ~ 1.0MPa, send into outer steam supply header 4, by the steam of outer steam supply header 4 externally required for supply enterprise's production;
As shown in Figure 2, the High Temperature High Pressure sewage that steam boiler 2 is fixed, platoon is discharged, is generally the saturation water of the High Temperature High Pressure of 4.0 ~ 10.0MPa, is drained in steam accumulator 6.By accumulation of energy and the pressure stabilization function of steam accumulator 6, unstable determines the blowdown water and steam that draining converts parameter stability, continuous print 0.6 ~ 1.0MPa to.0.6 ~ 1.0MPa saturated vapour that steam accumulator 6 produces, sends into outer in steam header 4 by pipeline.The saturation water of 0.6 ~ 1.0MPa that steam accumulator 6 is discharged, be sent in low pressure steam development unit 5, low pressure steam development unit 5 produces steam and the saturation water of about 0.2MPa.The steam of about the 0.2MPa that low pressure steam development unit 5 produces is sent in the deoxygenation head of oxygen-eliminating device 3, is used for carrying out deoxygenation and heating to the water inlet of oxygen-eliminating device 3.The high-temperature water of about 120 DEG C that low pressure steam development unit 5 is discharged enters the low temperature moisturizing of the steam boiler 2 of oxygen-eliminating device 3 by make-up water preheater 7 heating, fully reclaim the heat of sewer.Sewer after make-up water preheater 7 is lowered the temperature, generally at about 30 DEG C, directly can enter gutter.
As shown in Figure 2, from the superheated vapor of 0.6 ~ 1.0MPa of outer steam supply header 4, be introduced into steam expansion machine 8 and carry out expansion work, the output work of steam expansion machine 8 drives the external output power of generator.The low pressure steam of about the 0.2MPa that steam expansion machine 8 is discharged, is fed in the deoxygenation head of oxygen-eliminating device 3, is used for carrying out heating and deoxygenation to the boiler feed water entering oxygen-eliminating device 3.
As shown in Figure 2, in the present embodiment, prove through theory analysis and simulation, the superheated vapor of 75t/h, 3.8Mpa is produced at steam boiler, under outer steam supply header externally supplies the condition of micro-superheated vapor of 30t/h, 0.8MPa, the method and apparatus adopting the co-generation unit energy efficient that the utility model proposes to reclaim compares traditional system (as shown in Figure 1), about can increase electric power and export 200kW/h, increase external steam supplying amount about 1200 tons/year (in 8000 hours/year), increase income and amount to about 1,000,000 yuan/year.
The present embodiment can the heat of fixed, the platoon sewer of recovered steam boiler effectively, and reduce the heat loss of boiler blow-off as much as possible, a heat part for the boiler blow-off of recovery is used for external steam supply, and a part is used for carrying out preheating to boiler replenishing water; Improve the energy regenerating level of the steam of oxygen-eliminating device of entering, utilize steam expansion machine to reclaim some mechanical energy contained by the steam entering oxygen-eliminating device efficiently.The utility model overcomes the defect of prior art, and the method and apparatus of a kind of co-generation unit energy efficient recovery of proposition, mainly comprises steam boiler blowdown energy recovery unit and oxygen-eliminating device steam energy recovery unit two large divisions.Steam boiler blowdown energy recovery unit recovered steam boiler is fixed, the heat of platoon sewer, and a heat part for the boiler blow-off of recovery is used for external steam supply, and a part is used for carrying out preheating to boiler replenishing water, reduces the heat loss of boiler blow-off as much as possible; Oxygen-eliminating device steam energy recovery unit utilizes steam expansion machine to reclaim some mechanical energy contained by the steam entering oxygen-eliminating device more efficiently, improves the energy regenerating level entering the steam of oxygen-eliminating device.
Above-described embodiment, the just one of the utility model more preferably embodiment, the usual change that those skilled in the art carries out within the scope of the technical program and replacing all should be included in protection domain of the present utility model.
Claims (5)
1. a co-generation unit energy efficient recovering device, is characterized in that, comprises steam boiler blowdown energy recovery unit and oxygen-eliminating device steam energy recovery unit, wherein:
Described steam boiler blowdown energy recovery unit comprises the steam accumulator, low pressure blowdown system and the make-up water preheater that are connected successively, and described steam accumulator is connected with the steam boiler of co-generation unit; The steam produced after the dilatation of described low pressure blowdown system enters into oxygen-eliminating device; Described make-up water preheater is connected with the oxygen-eliminating device of co-generation unit;
Described oxygen-eliminating device steam energy recovery unit comprises outer steam supply header and steam expansion machine, described outer steam supply header receives the steam from steam accumulator and generator set, and a steam part is supplied steam as outer, another part is sent in described steam expansion machine, described steam expansion machine is driven to do work, the output work of steam expansion machine drives the external output power of generator, and the steam of discharge is sent in described oxygen-eliminating device.
2. co-generation unit energy efficient recovering device according to claim 1, is characterized in that, described steam expansion machine is connected with the admission end of oxygen-eliminating device, enters the steam before oxygen-eliminating device first by after the acting of steam expansion machine, then enters oxygen-eliminating device.
3. co-generation unit energy efficient recovering device according to claim 1, is characterized in that, the sewage draining exit of steam boiler is connected with described steam accumulator, and the sewer determining row and platoon of described steam boiler drains into described steam accumulator.
4. co-generation unit energy efficient recovering device according to claim 1, is characterized in that, the steam-expelling port of described steam accumulator is connected with described outer steam supply header, and the steam that described steam accumulator produces is admitted to outer steam supply header; The drain opening of described steam accumulator is connected with described low pressure blowdown system, and the draining of described steam accumulator enters low pressure blowdown system.
5. co-generation unit energy efficient recovering device according to claim 1, it is characterized in that, the drain opening of described low pressure blowdown system is connected with described make-up water preheater, and described make-up water preheater is heating boiler moisturizing simultaneously, and the boiler replenishing water after preheating is sent into oxygen-eliminating device.
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| CN201521029370.4U CN205225352U (en) | 2015-12-10 | 2015-12-10 | High -efficient recovery unit of combined heat and power generation system energy |
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| CN201521029370.4U CN205225352U (en) | 2015-12-10 | 2015-12-10 | High -efficient recovery unit of combined heat and power generation system energy |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321174A (en) * | 2016-08-23 | 2017-01-11 | 中信重工机械股份有限公司 | Power generation system utilizing waste heat of high-temperature flue gas |
| CN106321175A (en) * | 2016-08-23 | 2017-01-11 | 中信重工机械股份有限公司 | Coal gas power generation system for steel mills |
| CN108150995A (en) * | 2017-12-18 | 2018-06-12 | 新智能源系统控制有限责任公司 | A kind of distributed energy cogeneration of heat and power control system and method for reducing thermal loss |
| CN111663966A (en) * | 2020-05-09 | 2020-09-15 | 广西电网有限责任公司电力科学研究院 | Running area testing system for cogeneration unit |
| CN112610941A (en) * | 2020-12-30 | 2021-04-06 | 中冶焦耐(大连)工程技术有限公司 | Low-grade waste heat recovery system and process of coking production system |
-
2015
- 2015-12-10 CN CN201521029370.4U patent/CN205225352U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321174A (en) * | 2016-08-23 | 2017-01-11 | 中信重工机械股份有限公司 | Power generation system utilizing waste heat of high-temperature flue gas |
| CN106321175A (en) * | 2016-08-23 | 2017-01-11 | 中信重工机械股份有限公司 | Coal gas power generation system for steel mills |
| CN106321174B (en) * | 2016-08-23 | 2018-02-13 | 中信重工机械股份有限公司 | A kind of electricity generation system using high-temperature flue gas waste heat |
| CN108150995A (en) * | 2017-12-18 | 2018-06-12 | 新智能源系统控制有限责任公司 | A kind of distributed energy cogeneration of heat and power control system and method for reducing thermal loss |
| CN108150995B (en) * | 2017-12-18 | 2019-06-28 | 新智能源系统控制有限责任公司 | A kind of distributed energy cogeneration of heat and power control system and method reducing thermal loss |
| CN111663966A (en) * | 2020-05-09 | 2020-09-15 | 广西电网有限责任公司电力科学研究院 | Running area testing system for cogeneration unit |
| CN112610941A (en) * | 2020-12-30 | 2021-04-06 | 中冶焦耐(大连)工程技术有限公司 | Low-grade waste heat recovery system and process of coking production system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171128 Address after: High road high tech Development Zone Nanjing city Jiangsu province 210032 No. 20 Patentee after: NARI Technology Development Co., Ltd. Address before: 211106 Jiangning City, Nanjing Province, the integrity of the road No. 19, Patentee before: ENERGY SAVING ENVIRONMENTAL PROTECTION BRANCH, NANJING NARI GROUP COMPANY |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20171210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |