CN207635319U - A kind of steam power plant's low grade residual heat reuse means - Google Patents
A kind of steam power plant's low grade residual heat reuse means Download PDFInfo
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- CN207635319U CN207635319U CN201721586916.5U CN201721586916U CN207635319U CN 207635319 U CN207635319 U CN 207635319U CN 201721586916 U CN201721586916 U CN 201721586916U CN 207635319 U CN207635319 U CN 207635319U
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- water
- cooling tower
- desalination
- heat exchanger
- heat
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 125
- 238000010612 desalination reaction Methods 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 36
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 abstract description 4
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 238000010977 unit operation Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 8
- 239000003245 coal Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The utility model discloses a kind of steam power plant's low grade residual heat reuse means, the water circulating pump being connected including cooling tower and with cooling tower, it is internally provided with heat exchanger in the sink of cooling tower, heat exchanger is provided with desalination water inlet, desalination water out, circulating water intake pipe and circulating water outlet, desalination water inlet is connect by desalination water pump with sweet-water tank, and desalination water out is connect by oxygen-eliminating device with boiler.The utility model is simple in structure, efficient, safety and environmental protection, utilizing the low-quality heat desalination coolant-temperature gage of recirculated water in cooling tower, improve boiler feed temperature, while increasing boiler thermal efficiency, cooling tower heat dissipation effect is improved again, reduces circulating water temperature, and improve condenser vacuum indirectly, the stability for increasing unit operation plays waste heat recovery, the effect that energy-saving and emission-reduction, efficient circulation utilize.
Description
Technical field
The utility model is related to energy-conserving and emission-cutting technology fields, and in particular to a kind of steam power plant's low grade residual heat recycling dress
It sets.
Background technology
Coal fired thermal power plant is the main enterprises of China's power generation, has 78% electricity to come from Coal-fired Thermal Power in national electricity consumption
Factory.AND ENERGY RESOURCES CONSUMPTION IN CHINA will exploit the primary energy of nearly 2,000,000,000 tons of standard coals every year based on coal, convert into RMB about 1
The industrial output value of trillion yuan, wherein nearly half is burnt up by power plant boiler.Therefore, coal-burning power plant advocates section comprehensively at this stage
It can be transformed, coal consumption for power generation is greatly reduced and improve energy utilization rate, energy-saving and emission-reduction reach power industry with this and clean, efficiently
Change development.
The energy and environmental problem increasingly serious in face of China improves the comprehensive of the middle-size and small-size Thermal Power Enterprises that China has a large capacity and a wide range
It closes efficiency of energy utilization and reduces environmental pollution, it has also become current thermoelectricity industry one of critical issue urgently to be resolved hurrily.For electricity
For factory, recirculated cooling water needs to recycle after cooling tower cools, and cooling tower has scattered and disappeared the heat more than 50%, this
It is one of the main reason for power plant's integrated heat efficiency is low.Generatine set heat efficiency is improved, heat recovery, low-quality heat recovery is all
It is the important directions of current researcher.Coal-burning power plant's circulating water in turbine condenser temperature generally between 32~45 DEG C,
Though temperature is not high, flow is larger, and processing mode common at this stage is to drop recirculated water by the direct natural heat-exchange of cooling tower
Low temperature, to recycle.There is a large amount of low-quality heat to be wasted among these, but because this partial heat quality is relatively low
But it cannot be utilized very well always.Meanwhile recirculated water inflow temperature directly affects steam-turbine unit vacuum degree, the vacuum degree of unit
It is improved obviously with the reduction (same load) of recirculated water inflow temperature, it is on the contrary then drop.And the vacuum of steam turbine is
Affect the key parameter of the safety and economic operation of unit.Condenser vacuum, that is, exhaust steam pressure can be steamed with corresponding saturation
Stripping temperature determines.Vacuum degree is higher, and exhaust temperature is lower, and the steam turbine efficiency of cycle is higher.General operating experience shows solidifying
Vapour device vacuum often declines 1KPa, and the unit steam consumption can increase by 1.5~2.5%.So if the heat of recirculated water can quilt in cooling tower
It recycles, can not only play the role of energy saving, moreover it is possible to improve generatine set heat efficiency, improve security and stability.
Invention content
Technical problem to be solved in the utility model is present situation for the above-mentioned prior art, provide it is a kind of it is simple in structure,
Efficient, safety and environmental protection steam power plant's low grade residual heat reuse means.
To achieve the above object, the technical solution adopted in the utility model is：A kind of steam power plant's low grade residual heat recycling
Device, including cooling tower and the water circulating pump that is connected with the cooling tower, are internally provided in the sink of the cooling tower
Heat exchanger, the heat exchanger is provided with desalination water inlet, desalination water out, circulating water intake pipe and circulating water outlet, described
Desalination water inlet connect with sweet-water tank by desalination water pump, the desalination water out is connect by oxygen-eliminating device with boiler.
As preferred embodiments of the present invention, the heat exchanger tube of the heat exchanger is preferably extended surface tube.
As preferred embodiments of the present invention, the heat exchanger tube preferably uses counter-flow arrangement.
When steam power plant's low grade residual heat reuse means recovery waste heat of the utility model, demineralized water by sweet-water tank by
Demineralized water is pumped to heat exchanger, while recirculated water enters heat exchanger by circulating water intake pipe and exchanges heat with demineralized water, desalination
A large amount of low-quality heat sources in water absorption cycle water, temperature enter oxygen-eliminating device after increasing, enter back into the feed water system of boiler.Recirculated water is logical
It crosses heat exchanger and part low-temperature heat source is transmitted to demineralized water, and beaten by water circulating pump supercharging after temperature by air-cooled further decrease
It is back to circulation.Recirculated water inflow temperature directly affects steam-turbine unit vacuum, the vacuum degree of unit obviously with
It the reduction (same load) of recirculated water inflow temperature and improves, it is on the contrary then drop.
The utility model improves boiler feedwater temperature using the low-quality heat desalination coolant-temperature gage of recirculated water in cooling tower
Degree while increasing boiler thermal efficiency, and improves cooling tower heat dissipation effect, reduces circulating water temperature, also improve indirectly
The vacuum of condenser increases the stability of unit operation, plays waste heat recovery, the effect that energy-saving and emission-reduction, efficient circulation utilize
Fruit has the advantages that simple in structure, efficient, safety and environmental protection.
According to practical condition, the technical program be equally adaptable to it is a few set units between in conjunction with cooperation, technical solution
Flexibly, construction is simple, it is with obvious effects.
Compared with prior art, the utility model has the following advantages that：
1, efficient, the utility model can efficiently utilize a large amount of low-quality heats in cooling tower, significantly improve demineralized water
Temperature substantially increases the thermal efficiency of boiler to improve boiler feed temperature, and energy-saving effect is apparent；
2, safety and environmental protection not only improves desalination coolant-temperature gage using waste heat, also improves the vacuum degree of unit indirectly, favorably
In unit safety stable operation；
3, simple in structure, full utilization cooling tower itself heat exchange property heats demineralized water, and equipment investment is few, transformation and
Maintenance cost is low, is suitable for large-scale application.
Description of the drawings
Fig. 1 is the flow diagram of steam power plant's low grade residual heat reuse means of the utility model.
In figure, sweet-water tank 1, desalination water pump 2, heat exchanger 3, cooling tower 4, oxygen-eliminating device 5, water circulating pump 6, circulating water intake
Pipe 7, boiler 8.
Specific implementation mode
As shown in Figure 1, a kind of steam power plant's low grade residual heat reuse means, including cooling tower 4 and it is connected with cooling tower 4
Water circulating pump 6 is internally provided with heat exchanger 3 in the sink of cooling tower 4, and heat exchanger 3 is provided with desalination water inlet, demineralized water goes out
Mouth, circulating water intake pipe 7 and circulating water outlet, desalination water inlet are connect by desalination water pump 2 with sweet-water tank 1, and demineralized water goes out
Mouth is connect by oxygen-eliminating device 5 with boiler 8.
Workflow is：Demineralized water is sent by desalination water pump 2 to heat exchanger 3 by sweet-water tank 1, while recirculated water is by following
Ring water inlet pipe 7 exchanges heat into heat exchanger 3 with demineralized water, a large amount of low-quality heat sources, temperature in demineralized water absorption cycle water
Enter oxygen-eliminating device 5 after raising, enters back into boiler 8.Part low-temperature heat source is transmitted to demineralized water by recirculated water by heat exchanger 3, and is led to
Air-cooled further decrease is crossed to return to circulation by the supercharging of water circulating pump 6 after temperature.
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail, but the utility model
It is not limited in the embodiment described.
Embodiment 1
A kind of steam power plant's low grade residual heat reuse means, including cooling tower 4 and the water circulating pump 6 that is connected with cooling tower 4,
Being internally provided with heat exchanger 3 in the sink of cooling tower 4, (heat exchanger tube is extended surface tube, and specification isUsing counter-flow arrangement), it changes
Hot device 3 is provided with desalination water inlet, desalination water out, circulating water intake pipe 7 and circulating water outlet, and desalination water inlet passes through desalination
Water pump 2 is connect with sweet-water tank 1, and desalination water out is connect by oxygen-eliminating device 5 with boiler 8.
Low grade residual heat is recycled using the device：Desalination water flow is 200t/h before heat exchange, and initial temperature is 20 DEG C；Cycle
Water flow is 2500t/h, and initial temperature is 39 DEG C；Desalination coolant-temperature gage is raised to 30 DEG C from 20 DEG C after heat exchange, circulating cooling coolant-temperature gage
35 DEG C are down to, cycle water end (W.E.) difference reduces by 1 DEG C, and condenser vacuum rises 0.8%, and gas turbine exhaust gas temperature reduces by 1.5 DEG C.
Embodiment 2
A kind of steam power plant's low grade residual heat reuse means, including cooling tower 4 and the water circulating pump 6 that is connected with cooling tower 4,
Being internally provided with heat exchanger 3 in the sink of cooling tower 4, (heat exchanger tube is extended surface tube, and specification isUsing counter-flow arrangement), it changes
Hot device 3 is provided with desalination water inlet, desalination water out, circulating water intake pipe 7 and circulating water outlet, and desalination water inlet passes through desalination
Water pump 2 is connect with sweet-water tank 1, and desalination water out is connect by oxygen-eliminating device 5 with boiler 8.
Low grade residual heat is recycled using the device：Desalination water flow is 210t/h before heat exchange, and initial temperature is 22 DEG C；Cycle
Water flow is 2700t/h, and initial temperature is 39 DEG C；Desalination coolant-temperature gage is raised to 32 DEG C from 22 DEG C after heat exchange；Circulating water temperature is down to
34.5 DEG C, cycle water end (W.E.) difference reduces by 1 DEG C, and condenser vacuum rises 1%, and gas turbine exhaust gas temperature reduces by 2 DEG C.
Embodiment 3
A kind of steam power plant's low grade residual heat reuse means, including cooling tower 4 and the water circulating pump 6 that is connected with cooling tower 4,
Being internally provided with heat exchanger 3 in the sink of cooling tower 4, (heat exchanger tube is extended surface tube, and specification isUsing counter-flow arrangement),
Heat exchanger 3 is provided with desalination water inlet, desalination water out, circulating water intake pipe 7 and circulating water outlet, and desalination water inlet is by removing
Brine pump 2 is connect with sweet-water tank 1, and desalination water out is connect by oxygen-eliminating device 5 with boiler 8.
Low grade residual heat is recycled using the device：Desalination water flow is 220t/h before heat exchange, and initial temperature is 25 DEG C；Cycle
Water flow is 2800t/h, and initial temperature is 40 DEG C；Desalination coolant-temperature gage is raised to 32 DEG C from 25 DEG C after heat exchange；Circulating water temperature is down to
34.7 DEG C, cycle water end (W.E.) difference reduces by 1.7 DEG C, and condenser vacuum rises 1%, and gas turbine exhaust gas temperature reduces by 2 DEG C.
Embodiment 4
A kind of steam power plant's low grade residual heat reuse means, including cooling tower 4 and the water circulating pump 6 that is connected with cooling tower 4,
Being internally provided with heat exchanger 3 in the sink of cooling tower 4, (heat exchanger tube is extended surface tube, and specification isUsing counter-flow arrangement),
Heat exchanger 3 is provided with desalination water inlet, desalination water out, circulating water intake pipe 7 and circulating water outlet, and desalination water inlet is by removing
Brine pump 2 is connect with sweet-water tank 1, and desalination water out is connect by oxygen-eliminating device 5 with boiler 8.
Low grade residual heat is recycled using the device：Desalination water flow is 190t/h before heat exchange, and initial temperature is 18 DEG C；Cycle
Water flow is 3000t/h, and initial temperature is 42 DEG C；Desalination coolant-temperature gage is raised to 29 DEG C from 18 DEG C after heat exchange；Circulating water temperature is down to
35.3 DEG C, cycle water end (W.E.) difference reduces by 0.7 DEG C, and condenser vacuum rises 0.6%, and gas turbine exhaust gas temperature reduces by 1.2 DEG C.
Claims (3)
1. a kind of steam power plant's low grade residual heat reuse means, including cooling tower and the recirculated water that is connected with the cooling tower
Pump, which is characterized in that be internally provided with heat exchanger in the sink of the cooling tower, the heat exchanger be provided with demineralized water into
Mouth, desalination water out, circulating water intake pipe and circulating water outlet, the desalination water inlet pass through desalination water pump and sweet-water tank
Connection, the desalination water out are connect by oxygen-eliminating device with boiler.
2. steam power plant's low grade residual heat reuse means according to claim 1, which is characterized in that the heat exchanger
Heat exchanger tube is extended surface tube.
3. steam power plant's low grade residual heat reuse means according to claim 2, which is characterized in that the heat exchanger tube is adopted
Use counter-flow arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721586916.5U CN207635319U (en) | 2017-11-24 | 2017-11-24 | A kind of steam power plant's low grade residual heat reuse means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721586916.5U CN207635319U (en) | 2017-11-24 | 2017-11-24 | A kind of steam power plant's low grade residual heat reuse means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207635319U true CN207635319U (en) | 2018-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721586916.5U Expired - Fee Related CN207635319U (en) | 2017-11-24 | 2017-11-24 | A kind of steam power plant's low grade residual heat reuse means |
Country Status (1)
| Country | Link |
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| CN (1) | CN207635319U (en) |
Cited By (1)
| 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 |
-
2017
- 2017-11-24 CN CN201721586916.5U patent/CN207635319U/en not_active Expired - Fee Related
Cited By (1)
| 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 |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180720 |
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| CF01 | Termination of patent right due to non-payment of annual fee |