CN105953215A - Recycling system capable of absorbing waste heat of thermal power plant by desalted water - Google Patents
Recycling system capable of absorbing waste heat of thermal power plant by desalted water Download PDFInfo
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- CN105953215A CN105953215A CN201610472469.4A CN201610472469A CN105953215A CN 105953215 A CN105953215 A CN 105953215A CN 201610472469 A CN201610472469 A CN 201610472469A CN 105953215 A CN105953215 A CN 105953215A
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- heat
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- demineralized
- power plant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Physical Water Treatments (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a recycling system capable of absorbing waste heat of a thermal power plant by desalted power. The recycling system comprises a water treatment device (1), a waste-heat exchanger (2) of a desalted water cold slag recycler, a steam seal cooler (3), a heat pump or a heat exchanger (4) and a deaerator (5), a cooling tower (6) and a locomotive cooling device (7). The recycling system is characterized in that desalted water of the water treatment device (1) is divided into a plurality of branches which are merged into a main pipeline (19) so as to enter the deaerator (5) after passing through the waste-heat exchanger (2) of the cold slag recycler, the steam seal cooler (3) and the heat pump or the heat exchanger (4). The recycling system can effectively recycle waste heat of a steam turbine and heat of high-temperature discharged slag of a boiler; heat discharged into the atmosphere by circulating cooling water is recycled by the heat pump or the heat exchanger, so that consumption, in the deaerator, of steam for boiler desalted water self-heating is reduced, the energy resources of the thermal power plant are saved, and the heating capacity and the economical efficiency of the thermal power plant are improved.
Description
Technical field
The present invention relates to a kind of heat recovery technology, especially residual heat of electric power plant recovery technology, a kind of demineralized water absorbs the recovery system of steam power plant's waste heat.
Background technology
At present, for the back pressure unit steam power plant for heat supply, steam discharge is directly sent to heat user, evaporated condensation water reclaims, therefore run continuously for meeting turbine LP rotors, need constantly fill into new water to oxygen-eliminating device, and before covering oxygen-eliminating device, need to preheat water ebuillition of heated deoxygenation, therefore need to consume more steam heating during moisturizing, heating efficiency reduces.In recirculating cooling water system, there is substantial amounts of used heat and need to be taken away by recirculated cooling water and discharge into the atmosphere in the steam turbine auxiliary equipment such as lag cooler, gland-sealing cooler, auxiliary system waste heat is caused to waste, and moisture evaporation loss is serious, continuous moisturizing is needed to cause water resource waste, recirculated water reuses deteriorating water quality, the easy fouling corrosion of the subsidiary engine such as lag cooler, gland-sealing cooler for a long time simultaneously.In boiler slag removal system, boiler slag removal high-temperature residual heat also results in energy waste.To this, do not cause enough attention.
Conventional thermal power plant demineralized water and circulating water cooling system device are as shown in Figure 1, Fig. 1 (a) is boiler DW system demineralized water system, former water demineralized water pipeline 9 after water treatment facilities 1 enters oxygen-eliminating device 5, coming from steam-turbine pipeline 16 and introduce oxygen-eliminating device, steam enters boiler through pipeline 15 after carrying out demineralized water heating deoxygenation；Fig. 1 (b) circulation, recirculated water enters cooling tower 6 respectively after gland-sealing cooler 3, lag cooler 2 and engineering cooling device 7 thereof etc. absorb heat and dispels the heat, forms closed circuit.
Summary of the invention
The relatively low needs of coolant-temperature gage that it is an object of the invention to enter oxygen-eliminating device for current boiler demineralized water consumes the heating of a large amount of steam, and circulation lag cooler and steam turbine packing and engineering cooling equipment have the problem that amount of heat is wasted, design one can absorb steam turbine packing and lag cooler and engineering cooling equipment heat to heat demineralized water, thus reach steam saving for entering the demineralized water raising coolant-temperature gage of oxygen-eliminating device, and reclaim the recovery waste heat system of the waste heat of cooling tower and air cooler discharge.
The technical scheme is that
A kind of demineralized water absorbs the recovery system of steam power plant's waste heat, it includes that water treatment facilities 1, demineralized water reclaim lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump or heat exchanger 4 and oxygen-eliminating device 5, cooling tower 6 and engineering chiller 7, it is characterized in that the demineralized water of described water treatment facilities 1 is divided into multiple branch circuit, be incorporated to main line 19 enter in oxygen-eliminating device 5 by reclaiming lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump or heat exchanger 4.
Described water treatment facilities 1 process after demineralized cold water pipeline 9 be divided into road first branch road 12 enter lag cooler heat retrieving apparatus 2 absorb heat laggard enter main line 19, second branch road 10 of separately leading up to respectively enters the 3rd branch road 13 and the 4th branch road 11, and the demineralized cold water of entrance the 3rd branch road 13 enters to mix with the demineralized cold water entered after absorbing heat in gland-sealing cooler 3 after entering the waste heat in heat pump or the heat of heat exchanger 4 absorption cycle water branch road 18 again and steam pipework 17 with the demineralized cold water of the 4th branch road 11 after absorbing heat in gland-sealing cooler 3 and enters in main line 19 in the lump.
Described water treatment facilities 1 process after demineralized cold water pipeline 9 be divided into road first branch road 12 enter lag cooler heat retrieving apparatus 2 absorb heat laggard enter main line 19, second branch road 10 of separately leading up to respectively enters the 3rd branch road 13 and the 4th branch road 11, enters and enters in the lump in main line 19 after entering the waste heat in heat pump or the heat of heat exchanger 4 absorption cycle water branch road 18 again and steam pipework 17 after mixing with the demineralized cold water of the 4th branch road 11 after heat absorption in the demineralized cold water entrance gland-sealing cooler 3 of the 3rd branch road 13.
Described lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump or heat exchanger 4 all use high-efficiency bellows, corrugated tubing, finned tube, conduit pipe, ultra-high throughput pipe and heat exchange of heat pipe.
Demineralized water pipeline 9 is divided into multiple branch road and is connected with lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump or heat exchanger 4, oxygen-eliminating device 5 respectively, and demineralized water is sent in the feed water system of boiler through by the road 15 through the water of oxygen-eliminating device 5 deoxygenation.
Described circulating water line 18 and heat pump or heat exchanger 4 and cooling tower 6 and engineering chiller 7 are connected to form a closed circulation system.It is mounted on regulating valve or stop valve accordingly on described each branch road and pipeline.
Beneficial effects of the present invention:
The present invention uses demineralized water to absorb turbine shaft seal waste heat, owing to salt water quality is excellent, it is to avoid recirculated water uses the problem of fouling corrosion for a long time, improves the equipment heat exchange efficiencies such as gland-sealing cooler；Demineralized water is used to absorb boiler high temperature deslagging waste heat, can efficient recovery heat；Using demineralized water absorption cycle water low temperature exhaust heat, reduce cooling water tower circulation water pump construction cost, reduce the operating cost of cooling tower, great advantage can effectively reduce the consumption of oxygen-eliminating device heating steam, thus reach energy-saving and cost-reducing purpose.
The present invention uses demineralized water to reclaim lag cooler, steam turbine gland-sealing cooler heat, can effectively alleviate corrosion, recovery boiler deslagging waste heat, simultaneously by the waste heat recovery of recirculated cooling water, it is used to heating boiler and supplements demineralized water, both can reduce boiler water process former water heating in oxygen-eliminating device, heat the consumption of steam of using by oneself with deaerated water, the operating cost of cooling tower etc. can be reduced again, the most reasonable, efficiently reuse approach realizes the many economy of resources of steam power plant, reduce waste heat discharge, improve the ecological environment, waste heat recovery simultaneously makes again steam power plant's energy saving and efficiency increasing, realize waste thermal energy " minimizing, recycling, resource ".
Accompanying drawing explanation
Tu1Shi conventional thermal power plant's demineralized water and the schematic diagram of circulating water cooling system device；Fig. 1 (a) is boiler DW system demineralized water system；Fig. 1 (b) batch is circulation.
Fig. 2 is one of structural representation of the present invention.
Fig. 3 is the two of the structural representation of the present invention.
In figure: 1, water treatment facilities, 2, lag cooler waste-heat recoverer, 3, gland-sealing cooler, 4, heat pump or heat exchanger, 5, oxygen-eliminating device, 6, cooling tower, 7, engineering chiller, 8, water circulating pump, 9-15, demineralized water pipeline, 19, main line, 16-17, steam pipework, 18, circulating water line.
Detailed description of the invention
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings.
Embodiment one.
As shown in Figure 2.
nullA kind of demineralized water absorbs the recovery system of steam power plant's waste heat，It includes water treatment facilities 1、Demineralized water reclaims lag cooler heat retrieving apparatus 2、Gland-sealing cooler 3、Heat pump or heat exchanger 4 and oxygen-eliminating device 5、Cooling tower 6 and engineering chiller 7，The demineralized water of described water treatment facilities 1 is divided into multiple branch circuit，By reclaiming lag cooler heat retrieving apparatus 2、Gland-sealing cooler 3、Heat pump or heat exchanger 4 are incorporated to main line 19 and enter in oxygen-eliminating device 5，Concrete attachment structure is as shown in Figure 2，Fig. 2 sewerage disposing device 1 process after demineralized cold water pipeline 9 be divided into road first branch road 12 enter lag cooler heat retrieving apparatus 2 absorb heat laggard enter main line 19，Second branch road 10 of separately leading up to respectively enters the 3rd branch road 13 and the 4th branch road 11，Enter the demineralized cold water of the 3rd branch road 13 enter in gland-sealing cooler 3 after heat absorption after the demineralized cold water with the 4th branch road 11 enters the waste heat in heat pump or the heat of heat exchanger 4 absorption cycle water branch road 18 again and steam pipework 17 with enter in gland-sealing cooler 3 demineralized cold water after heat absorption and mix in the lump in entrance main line 19.In order to improve endothermic effect, described lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump or heat exchanger 4 all should use high-efficiency bellows, corrugated tubing, finned tube, conduit pipe, ultra-high throughput pipe and heat exchange of heat pipe to realize heat exchange, in Fig. 2, demineralized water pipeline 9 is divided into multiple branch road and is connected with lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump or heat exchanger 4, oxygen-eliminating device 5 respectively, and demineralized water is sent in the feed water systems of boiler through by the road 15 through the water of oxygen-eliminating device 5 deoxygenation.In addition circulating water line 18 and heat pump or heat exchanger 4 and cooling tower 6 and engineering chiller 7 are connected to form a closed circulation system.For the ease of controlling and regulation when being embodied as, can be mounted on regulating valve or stop valve accordingly on each branch road and pipeline.Regulation valve or stop valve can use manually or electrically structure, and preferential employing electric structure is so that remotely controlling.
Owing to salt water quality is excellent, it is to avoid recirculated water uses the problem of fouling corrosion for a long time, improve gland-sealing cooler and the equipment heat exchange efficiency such as lag cooler and engineering cooling equipment；Demineralized water is used to absorb boiler high temperature deslagging waste heat, can efficient recovery heat；Using demineralized water absorption cycle water low temperature exhaust heat, reduce cooling water tower circulation water pump construction cost, reduce the operating cost of cooling tower, great advantage can effectively reduce the consumption of oxygen-eliminating device heating superheated steam, thus reach energy-saving and cost-reducing purpose.
Embodiment two.
As shown in Figure 3.
nullA kind of demineralized water absorbs the recovery system of steam power plant's waste heat，It includes water treatment facilities 1、Demineralized water reclaims lag cooler heat retrieving apparatus 2、Gland-sealing cooler 3、Heat pump or heat exchanger 4 and oxygen-eliminating device 5、Cooling tower 6 and engineering chiller 7，The demineralized water of described water treatment facilities 1 is divided into multiple branch circuit，By reclaiming lag cooler heat retrieving apparatus 2、Gland-sealing cooler 3、Heat pump or heat exchanger 4 are incorporated to main line 19 and enter in oxygen-eliminating device 5，Concrete attachment structure is as shown in Figure 3，Water treatment facilities 1 in Fig. 3 process after demineralized cold water pipeline 9 be divided into road first branch road 12 enter lag cooler heat retrieving apparatus 2 absorb heat laggard enter main line 19，Second branch road 10 of separately leading up to respectively enters the 3rd branch road 13 and the 4th branch road 11，Enter and enter in the lump in main line 19 after entering the waste heat in heat pump or the heat of heat exchanger 4 absorption cycle water branch road 18 again and steam pipework 17 after the demineralized cold water entrance gland-sealing cooler 3 of the 3rd branch road 13 mixes with the demineralized cold water of the 4th branch road 11 after heat absorption.In order to improve endothermic effect, described lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump or heat exchanger 4 all should use high-efficiency bellows, corrugated tubing, finned tube, conduit pipe, ultra-high throughput pipe and heat exchange of heat pipe to realize heat exchange, similarly, in Fig. 3, demineralized water pipeline 9 is divided into multiple branch road and is connected with lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump or heat exchanger 4, oxygen-eliminating device 5 respectively, and demineralized water is sent in the feed water systems of boiler through by the road 15 through the water of oxygen-eliminating device 5 deoxygenation.In addition circulating water line 18 and heat pump or heat exchanger 4 and cooling tower 6 and engineering chiller 7 are connected to form a closed circulation system.For the ease of controlling and regulation when being embodied as, can be mounted on regulating valve or stop valve accordingly on each branch road and pipeline.Regulation valve or stop valve can use manually or electrically structure, and preferential employing electric structure is so that remotely controlling.
Part that the present invention does not relate to is same as the prior art maybe can use prior art to be realized.
Claims (7)
1. a demineralized water absorbs the recovery system of steam power plant's waste heat, it includes that water treatment facilities (1), demineralized water reclaim lag cooler heat retrieving apparatus (2), gland-sealing cooler (3), heat pump or heat exchanger (4) and oxygen-eliminating device (5), cooling tower (6) and engineering chiller (7), it is characterized in that the demineralized water of described water treatment facilities (1) is divided into multiple branch circuit, be incorporated in main line (19) entrance oxygen-eliminating device (5) by reclaiming lag cooler heat retrieving apparatus (2), gland-sealing cooler (3), heat pump or heat exchanger (4).
Demineralized water the most according to claim 1 absorbs the recovery system of steam power plant's waste heat, it is characterized in that described water treatment facilities (1) process after demineralized cold water pipeline (9) be divided into a road the first branch road (12) enter lag cooler heat retrieving apparatus (2) absorb heat laggard enter main line (19), the second branch road (10) of separately leading up to respectively enters the 3rd branch road (13) and the 4th branch road (11), enter demineralized cold water entrance gland-sealing cooler (3) of the 3rd branch road (13) mixes with the demineralized cold water after heat absorption middle with entrance gland-sealing cooler (3) after the waste heat in the demineralized cold water entrance heat pump of the 4th branch road (11) or the heat of heat exchanger (4) absorption cycle water branch road (18) again and steam pipework (17) after heat absorption and enter in the lump in main line (19).
Demineralized water the most according to claim 1 absorbs the recovery system of steam power plant's waste heat, it is characterized in that described water treatment facilities (1) process after demineralized cold water pipeline (9) be divided into a road the first branch road (12) enter lag cooler heat retrieving apparatus (2) absorb heat laggard enter main line (19), the second branch road (10) of separately leading up to respectively enters the 3rd branch road (13) and the 4th branch road (11), enter and enter in the lump in main line (19) after entering the waste heat in heat pump or the heat of heat exchanger (4) absorption cycle water branch road (18) again and steam pipework (17) after demineralized cold water entrance gland-sealing cooler (3) of the 3rd branch road (13) mixes with the demineralized cold water of the 4th branch road (11) after heat absorption.
Demineralized water the most according to claim 1 absorbs the recovery system of steam power plant's waste heat, it is characterized in that described lag cooler heat retrieving apparatus (2), gland-sealing cooler (3), heat pump or heat exchanger (4) all uses high-efficiency bellows, corrugated tubing, finned tube, conduit pipe, ultra-high throughput pipe and heat exchange of heat pipe.
5. the recovery system of steam power plant's waste heat is absorbed according to the demineralized water described in Claims 2 or 3, it is characterized in that demineralized water pipeline (9) is divided into multiple branch road and is connected with lag cooler heat retrieving apparatus (2), gland-sealing cooler (3), heat pump or heat exchanger (4), oxygen-eliminating device (5) respectively, demineralized water is during through the water of oxygen-eliminating device (5) deoxygenation, through by the road, (15) send into the feed water system of boiler.
Demineralized water the most according to claim 1 absorbs the recovery system of steam power plant's waste heat, it is characterized in that described circulating water line (18) and heat pump or heat exchanger (4) and cooling tower (6) and engineering chiller (7) are connected to form a closed circulation system.
Demineralized water the most according to claim 1 absorbs the recovery system of steam power plant's waste heat, it is characterized in that being mounted on regulating valve or stop valve accordingly on described each branch road and pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610472469.4A CN105953215B (en) | 2016-06-27 | 2016-06-27 | A kind of demineralized water absorbs the recovery system of steam power plant's waste heat |
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| CN201610472469.4A CN105953215B (en) | 2016-06-27 | 2016-06-27 | A kind of demineralized water absorbs the recovery system of steam power plant's waste heat |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869713A (en) * | 2017-11-24 | 2018-04-03 | 浙江巨化热电有限公司 | A kind of steam power plant's low grade residual heat reuse means and method |
| CN111174195A (en) * | 2020-01-10 | 2020-05-19 | 安徽金禾实业股份有限公司 | Method for recycling waste heat of synthetic ammonia conversion gas |
| CN114109532A (en) * | 2021-10-22 | 2022-03-01 | 中盐安徽红四方股份有限公司 | Steam seal cooling and recycling system of steam turbine |
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| CN111174195A (en) * | 2020-01-10 | 2020-05-19 | 安徽金禾实业股份有限公司 | Method for recycling waste heat of synthetic ammonia conversion gas |
| CN114109532A (en) * | 2021-10-22 | 2022-03-01 | 中盐安徽红四方股份有限公司 | Steam seal cooling and recycling system of steam turbine |
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| CN105953215B (en) | 2018-06-08 |
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