CN105953215B - A kind of demineralized water absorbs the recovery system of steam power plant's waste heat - Google Patents
A kind of demineralized water absorbs the recovery system of steam power plant's waste heat Download PDFInfo
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- CN105953215B CN105953215B CN201610472469.4A CN201610472469A CN105953215B CN 105953215 B CN105953215 B CN 105953215B CN 201610472469 A CN201610472469 A CN 201610472469A CN 105953215 B CN105953215 B CN 105953215B
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- 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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Abstract
A kind of demineralized water absorbs the recovery system of steam power plant's waste heat, it includes water treatment facilities（1）, demineralized water recycling 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 cooling device（7）, it is characterized in that the water treatment facilities（1）Demineralized water be divided into multiple branch circuit, by recycling lag cooler heat retrieving apparatus（2）, gland-sealing cooler（3）, heat pump or heat exchanger（4）It is incorporated to main line（19）Into oxygen-eliminating device（5）In.The present invention can effectively recycle turbine exhaust heat and boiler high temperature deslagging heat, the heat of air is discharged into using heat pump or heat exchanger recycling recirculated cooling water, the consumption that boiler demineralized water heats personal steam in oxygen-eliminating device is reduced, steam power plant's energy is saved, improves the heat capacity and economy of steam power plant.
Description
Technical field
The present invention relates to a kind of heat recovery technology, especially residual heat of electric power plant recovery technology, specifically a kind of desalination
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, and evaporated condensation water recycles, because
This constantly need to fill into Xin Shui to meet turbine LP rotors continuous operation to oxygen-eliminating device, and be needed before oxygen-eliminating device is covered by water
Ebuillition of heated deoxygenation is preheated, therefore more steam heating need to be consumed during moisturizing, heating efficiency reduces.In recirculating cooling water system
In, the steam turbine auxiliaries such as lag cooler, gland-sealing cooler equipment need to be taken away there are a large amount of waste heat by recirculated cooling water to be discharged into greatly
In gas, auxiliary system waste heat is caused to waste, and moisture evaporation loss is serious, and continuous moisturizing is needed to cause water resource waste,
Recirculated water reuses deteriorating water quality, the easy fouling corrosion of the subsidiary engines such as lag cooler, gland-sealing cooler for a long time simultaneously.In boiler slag removal
In system, boiler slag removal high-temperature residual heat also results in energy waste.In this regard, enough attention are not caused.
Conventional thermoelectric factory demineralized water and circulating water cooling system device are as shown in Figure 1, Fig. 1（a）For boiler DW system demineralized water system,
Desalination water lines 9 of the raw water after water treatment facilities 1 come from the first steam pipework of steam turbine 16 and introduce deoxygenation into oxygen-eliminating device 5
Device, steam are carried out demineralized water after heating deoxygenation through pipeline 15 into boiler；Fig. 1（b）Circulation, recirculated water is respectively through packing
Cooler 3, lag cooler 2 and its engineering cooling equipment 7 etc. radiate after absorbing heat into cooling tower 6, form circulation loop.
Invention content
The relatively low a large amount of steamings of needs consumption of coolant-temperature gage for entering oxygen-eliminating device the purpose of the present invention is being directed to current boiler demineralized water
Vapour heats, and circulation lag cooler and steam turbine packing and engineering cooling equipment have the problem of amount of heat waste, design one
Kind can absorb steam turbine packing and lag cooler and engineering cooling equipment heat to heat demineralized water, so as to be the desalination into oxygen-eliminating device
Water improves coolant-temperature gage and reaches saving steam, and recycles the recovery waste heat system of cooling tower and the waste heat of 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 water treatment facilities 1, demineralized water recycling lag cooler
Heat retrieving apparatus 2, gland-sealing cooler 3, heat pump 4 and oxygen-eliminating device 5, cooling tower 6 and engineering cooling device 7, it is characterized in that at the water
The demineralized water of reason device 1 is divided into multiple branch circuit, recycles lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump 4 by demineralized water and becomes owner of
Pipeline 19 enters in oxygen-eliminating device 5.
Treated that desalination water lines 9 are divided into enters demineralized water through the first branch 12 all the way and return for the water treatment facilities 1
It receives after lag cooler heat retrieving apparatus 2 absorbs heat and enters main line 19, another way respectively enters third branch 13 by the second branch 10
With the 4th branch 11, the demineralized cold water into third branch 13 enters in gland-sealing cooler 3 and absorbs heat, and the desalination of the 4th branch 11 is cold
Water enters the waste heat in the heat and the second steam pipework 17 of 4 absorption cycle water lines 18 of heat pump, the gland-sealing cooler 3 after heat absorption
Enter in main line 19 with after the demineralized cold water mixing in heat pump 4.
Treated that desalination water lines 9 are divided into enters demineralized water through the first branch 12 all the way and return for the water treatment facilities 1
It receives after lag cooler heat retrieving apparatus 2 absorbs heat and enters main line 19, another way respectively enters third branch 13 by the second branch 10
With the 4th branch 11, into third branch 13 demineralized cold water enter in gland-sealing cooler 3 absorb heat after remove with the 4th branch 11
Enter after salt cold water mix after waste heat of the heat pump 4 again in the heat of absorption cycle water lines 18 and the second steam pipework 17 together
Into in main line 19.
The demineralized water recycles lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump 4 using high-efficiency bellows, screw thread
Pipe, finned tube, conduit pipe, ultra-high throughput pipe and heat exchange of heat pipe.
Desalination water lines 9 are divided into multiple branches and recycle lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump with demineralized water respectively
4th, oxygen-eliminating device 5 is connected, and water of the demineralized water through 5 deoxygenation of oxygen-eliminating device, which passes through, to be sent into through the second pipeline 15 in the feed water system of boiler.
The circulating water line 18 is connected to form a closed cycle with heat pump 4 and cooling tower 6 and engineering cooling device 7
System.Corresponding regulating valve or shut-off valve are mounted on each branch and pipeline.
Beneficial effects of the present invention：
The present invention absorbs turbine shaft seal waste heat using demineralized water, since salt water quality is excellent, avoids recirculated water for a long time
The problem of using fouling corrosion, improves the equipment heat exchange efficiencies such as gland-sealing cooler；More than demineralized water absorption boiler high temperature deslagging
Heat can effectively recycle heat；Using demineralized water absorption cycle water low temperature exhaust heat, reduce cooling water tower circulation water pump construction cost, drop
The operating cost of low cooling tower, great advantage can effectively reduce the consumption of oxygen-eliminating device heating steam, so as to reach energy saving drop
The purpose of consumption.
The present invention can effectively be mitigated corrosion, be recycled pot using demineralized water recycling lag cooler, steam turbine gland-sealing cooler heat
Furnace slag discharge waste heat, while by the waste heat recovery of recirculated cooling water, be used to heating boiler supplement demineralized water, can both reduce boiler
Water process raw water heats and deaerated water heats the consumption of personal steam in oxygen-eliminating device, and can reduce the running cost of cooling tower etc.
With, reasonable in this way, efficient reuse approach realizes the various economy of resources of steam power plant, reduces waste heat discharge, improves the ecological environment,
Waste heat recovery simultaneously makes steam power plant's energy saving and efficiency increasing again, realizes waste thermal energy " minimizing, recycling, recycling ".
Description of the drawings
Fig. 1 is the schematic diagram of Conventional thermoelectric factory demineralized water and circulating water cooling system device；Fig. 1（a）For boiler demineralized water
System；Fig. 1（b）For circulation.
Fig. 2 is one of structure diagram of the present invention.
Fig. 3 is the second structural representation of the present invention.
In figure：1st, water treatment facilities, 2, demineralized water recycling lag cooler heat retrieving apparatus, 3, gland-sealing cooler, 4, heat pump, 5, deoxygenation
Device, 6, cooling tower, 7, engineering cooling device, 8, water circulating pump, 9, desalination water lines, 10, the second branch, the 11, the 4th branch,
12nd, the first branch, 13, third branch, the 14, first pipeline, the 15, second pipeline, the 16, first steam pipework, the 17, second steam
Pipeline, 18, circulating water line, 19, main line.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment one.
As shown in Figure 2.
A kind of demineralized water absorbs the recovery system of steam power plant's waste heat, it includes water treatment facilities 1, demineralized water recycling lag cooler
Heat retrieving apparatus 2, gland-sealing cooler 3, heat pump 4 and oxygen-eliminating device 5, cooling tower 6 and engineering cooling device 7, the water treatment facilities 1
Demineralized water is divided into multiple branch circuit, by demineralized water recycle lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump 4 be incorporated to main line 19 into
Enter in oxygen-eliminating device 5, specific connection structure as shown in Fig. 2, Fig. 2 sewerage disposings device 1 treated that demineralized cold water pipeline 9 is divided into
Enter after demineralized water recycling lag cooler heat retrieving apparatus 2 absorbs heat through the first branch 12 all the way and enter main line 19, another way passes through
The second branch 10 respectively enters 13 and the 4th branch 11 of third branch, and the demineralized cold water into third branch 13 enters packing cooling
Enter heat pump 4 heat of absorption cycle water lines 18 and the second steaming again after absorbing heat in device 3 with the demineralized cold water of the 4th branch 11
Enter in main line 19 together with being mixed into the demineralized cold water after heat absorption in gland-sealing cooler 3 after waste heat in vapor pipeline 17.
In order to improve endothermic effect, demineralized water recycling lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump 4 should all use efficient
Bellows, screwed pipe, finned tube, conduit pipe, ultra-high throughput pipe and heat exchange of heat pipe, which are realized, to exchange heat, and desalination water lines 9 are divided in Fig. 2
It is connected respectively with demineralized water recycling lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump 4, oxygen-eliminating device 5 into multiple branches, desalination
Water of the water through 5 deoxygenation of oxygen-eliminating device, which passes through, to be sent into through the second pipeline 15 in the feed water system of boiler.In addition circulating water line 18 and heat pump 4
And cooling tower 6 and engineering cooling device 7 are connected to form a closed circulation system.For the ease of controlling and adjust during specific implementation
Section, can be mounted on corresponding regulating valve or shut-off valve on each branch and pipeline.Regulating valve or shut-off valve can be used manually or
Electric structure, preferentially using electric structure in order to remote control.
Since salt water quality is excellent, avoid the problem that recirculated water for a long time using fouling corrosion, improve gland-sealing cooler and
The equipment heat exchange efficiency such as lag cooler and engineering cooling equipment；Boiler high temperature deslagging waste heat is absorbed using demineralized water, can effectively be recycled
Heat；Using demineralized water absorption cycle water low temperature exhaust heat, reduce cooling water tower circulation water pump construction cost, reduce the operation of cooling tower
Expense, great advantage can effectively reduce the consumption of oxygen-eliminating device heating superheated steam, energy-saving so as to achieve the purpose that.
Embodiment two.
As shown in Figure 3.
A kind of demineralized water absorbs the recovery system of steam power plant's waste heat, it includes water treatment facilities 1, demineralized water recycling lag cooler
Heat retrieving apparatus 2, gland-sealing cooler 3, heat pump 4 and oxygen-eliminating device 5, cooling tower 6 and engineering cooling device 7, the water treatment facilities 1
Demineralized water is divided into multiple branch circuit, by demineralized water recycle lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump 4 be incorporated to main line 19 into
Enter in oxygen-eliminating device 5, specific connection structure as shown in figure 3, water treatment facilities 1 in Fig. 3 treated that demineralized cold water pipeline 9 divides
Enter main line 19 into entering after demineralized water recycling lag cooler heat retrieving apparatus 2 absorbs heat through the first branch 12 all the way, another way is led to
It crosses the second branch 10 and respectively enters 13 and the 4th branch 11 of third branch, to enter packing cold into the demineralized cold water of third branch 13
But into the heat of the absorption cycle water lines 18 again of heat pump 4 after mix after absorbing heat in device 3 with the demineralized cold water of the 4th branch 11
And the second waste heat in steam pipework 17 is latter and enters in main line 19.In order to improve endothermic effect, the demineralized water returns
High-efficiency bellows, screwed pipe, finned tube, conduit pipe, superelevation should all be used by receiving lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump 4
Flux tube and heat exchange of heat pipe realize heat exchange, and similarly, desalination water lines 9 are divided into multiple branches and are returned respectively with demineralized water in Fig. 3
It receives lag cooler heat retrieving apparatus 2, gland-sealing cooler 3, heat pump 4, oxygen-eliminating device 5 to be connected, water of the demineralized water through 5 deoxygenation of oxygen-eliminating device is by warp
Second pipeline 15 is sent into the feed water system of boiler.In addition circulating water line 18 and heat pump 4 and cooling tower 6 and engineering cooling device 7
It is connected to form a closed circulation system.For the ease of controlling and adjusting during specific implementation, can pacify on each branch and pipeline
Equipped with corresponding regulating valve or shut-off valve.Manually or electrically structure can be used in regulating valve or shut-off valve, preferentially using electric structure
In order to remote control.
Part that the present invention does not relate to is same as the prior art or the prior art can be used is realized.
Claims (3)
1. a kind of demineralized water absorbs the recovery system of steam power plant's waste heat, it includes water treatment facilities（1）, demineralized water recycling lag cooler
Heat retrieving apparatus（2）, gland-sealing cooler（3）, heat pump（4）And oxygen-eliminating device（5）, cooling tower（6）And engineering cooling device（7）, feature
It is the water treatment facilities（1）Demineralized water be divided into multiple branch circuit, respectively pass through demineralized water recycle lag cooler heat retrieving apparatus（2）, vapour
Seal cooler（3）, heat pump（4）It is incorporated to main line（19）Into oxygen-eliminating device（5）In；Circulating water line（18）With heat pump（4）It is and cold
But tower（6）With engineering cooling device（7）It is connected to form a closed circulation system；The water treatment facilities（1）Treated
Desalination water lines（9）It is divided into two tunnels, all the way through the first branch（12）Lag cooler heat retrieving apparatus is recycled into demineralized water（2）Absorb heat
Enter main line afterwards（19）, another way passes through the second branch（10）Respectively enter third branch（13）With the 4th branch（11）, into
Enter third branch（13）Demineralized cold water enter gland-sealing cooler（3）Middle heat absorption, the 4th branch（11）Demineralized cold water enter heat
Pump（4）Absorption cycle water lines（18）Heat and the second steam pipework（17）In waste heat, the gland-sealing cooler after heat absorption（3）
And heat pump（4）In demineralized cold water mixing after enter main line（19）In.
2. demineralized water according to claim 1 absorbs the recovery system of steam power plant's waste heat, it is characterized in that desalination water lines（9）
It is divided into multiple branches and recycles lag cooler heat retrieving apparatus with demineralized water respectively（2）, gland-sealing cooler（3）, heat pump（4）, oxygen-eliminating device（5）Phase
Connection, demineralized water is through oxygen-eliminating device（5）The water of deoxygenation passes through the second pipeline（15）It is sent into the feed water system of boiler.
3. demineralized water according to claim 1 absorbs the recovery system of steam power plant's waste heat, it is characterized in that each branch and pipeline
On be mounted on corresponding regulating valve or shut-off valve.
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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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| 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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