CN205119199U - Novel gas cogeneration of heat and power central heating device - Google Patents
Novel gas cogeneration of heat and power central heating device Download PDFInfo
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- CN205119199U CN205119199U CN201520873894.5U CN201520873894U CN205119199U CN 205119199 U CN205119199 U CN 205119199U CN 201520873894 U CN201520873894 U CN 201520873894U CN 205119199 U CN205119199 U CN 205119199U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 367
- 230000008676 import Effects 0.000 claims abstract description 38
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims description 58
- 239000002918 waste heat Substances 0.000 claims description 48
- 239000007789 gas Substances 0.000 claims description 33
- 239000007921 spray Substances 0.000 claims description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 23
- 239000003546 flue gas Substances 0.000 description 23
- 238000011084 recovery Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
- 239000003517 fume Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
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- 239000000567 combustion gas Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
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- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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Classifications
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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]
- Y02B30/12—Hot water central heating systems using heat pumps
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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
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Abstract
The utility model relates to a novel gas cogeneration of heat and power central heating device, go back to water heating system and heating power station including gas and steam combined cycle system, heat supply network, the gas and steam combined cycle system includes air compressor, gas turbine, combustion chamber, steam turbine high intermediate pressure cylinder, steam turbine low pressure jar, condenser and exhaust -heat boiler, be provided with high -pressure steam pocket, middling pressure steam pocket and low -pressure drum in exhaust -heat boiler's inside, air compressor's the export and the access connection of combustion chamber, the export of combustion chamber and gas turbine's access connection, gas turbine's export and exhaust -heat boiler's access connection, steam turbine high intermediate pressure cylinder's high pressure import, middling pressure import respectively with the exit linkage of high -pressure steam pocket, middling pressure steam pocket, the import of steam turbine low pressure jar and the exit linkage of low -pressure drum, the gas vent of steam turbine low pressure jar and the access connection of condenser, the condensate water export of condenser is connected with exhaust -heat boiler, steam turbine high intermediate pressure cylinder's gas vent returns water heating system with the exit linkage of low -pressure drum and common export between them with the heat supply network and is connected.
Description
Technical field
The utility model relates to a kind of novel gas cogeneration of heat and power central heating device, belongs to energy technology field.
Background technology
For district heating, a kind of typical way of natural gas applications is gas and steam combined cycle cogeneration heat supply.The principal mode of its system combines by gas turbine and steam turbine (Rankine cycle) circulatory system formed.The high-temperature flue gas that gas turbine is discharged is reclaimed by waste heat boiler and is converted to steam, then is generated electricity by steam injection steam turbine.In recent years, Gas-steam Combined Cycle cogeneration of heat and power technology obtains large development, but the raising of thermal source efficiency still has very large room for promotion.Improve the waste heat amount that efficiency may will excavate from system to start with: be the latent heat in flue gas on the one hand, this part waste heat amount can account for about 33% ~ 65% of unit rated heating capacity; Being the condensation heat (for ensureing unit safety operation, a large amount of low temperature exhaust heat need be discharged by cooling tower) that steam turbine is discharged on the other hand, 23% ~ 50% of unit rated heating capacity can be accounted for.Because municipal heating systems return water temperature is higher, gets back in steam power plant and be difficult to provide low temperature refrigerant by more than two kinds heat recovery, cause huge heat waste thus.For this problem, patent CN201010141597.3 devises a kind of novel energy supply system based on gas and steam combined cycle cogeneration, in steam power plant, utilize dividing wall type flue gas heat-exchange unit and the integrated Model Design of heat pump to reclaim the flow process of exhaust steam residual heat and fume afterheat, can recovery section waste heat, but this system still has two problems to need to solve, one is that the return water temperature of heat supply network is still also higher, getting back to steam power plant can not Mist heat recovering and exhaust steam residual heat fully, and the recovery of fume afterheat and exhaust steam residual heat is conflict, if reclaimed exhaust steam residual heat, just can not Mist heat recovering fully, vice versa, therefore the relation of fume afterheat and exhaust steam residual heat how is coordinated, the whole recovery realizing two parts waste heat become a difficult point.Another problem adopts indirect heat exchange mode at the flue gas waste heat recovery heat exchanger of steam power plant, also exists that heat transfer effect is bad, volume large, fume side resistance is large and the easy key issue such as corrosion.Patent CN201510009398.x devises a kind of Combined cycle gas-steam turbine central heating device and heat supply method, end have employed absorption heat exchange unit and makes return water temperature decrease (about 30 DEG C), comparatively patent CN201010141597.3 improves to some extent, but the backwater of this temperature gets back to steam power plant's Mist heat recovering and exhaust steam residual heat is still not thorough.Simultaneously, this system proposes flue gas to introduce in a direct contact type flue gas condensing heat exchanger in steam power plant, indirect type heat exchange is improved to direct contact heat transfer, flue gas waste heat recovery link is made not need to increase heat-transfer surface, return the etching problem avoiding heat-transfer surface, improve to some extent, but flue gas extraction is entered in independent direct contact type flue gas condensing heat exchanger, in actual transformation project, often there is plant area's spaces compact, there is no position and be difficult to the objective problem such as realization.
Utility model content
For the problems referred to above, the purpose of this utility model is to provide a kind of novel gas cogeneration of heat and power central heating device, and this device significantly can increase the heat capacity of system, improves the comprehensive utilization ratio of system, reduces pollutant emission.
For achieving the above object, the utility model is by the following technical solutions: a kind of novel gas cogeneration of heat and power central heating device, it is characterized in that: it comprises Combined cycle gas-steam turbine system, heat supply network backwater heating system and thermal substation, described Combined cycle gas-steam turbine system is connected with described thermal substation by described heat supply network backwater heating system; Described Combined cycle gas-steam turbine system comprises air compressor, gas turbine, combustion chamber, steam turbine high intermediate pressure cylinder, turbine low pressure cylinder, condenser and waste heat boiler; Wherein, described waste heat boiler is provided with boiler tail and sets up heating surface, and the end of described waste heat boiler is provided with low temperature direct contact heat transfer chimney; HP steam drum, middle pressure drum and low-pressure drum is provided with in the inside of described waste heat boiler; The outlet of described air compressor is connected with the import of described combustion chamber, and the outlet of described combustion chamber is connected with the import of described gas turbine, and the outlet of described gas turbine is connected with the import of described waste heat boiler; The high-pressure inlet of described steam turbine high intermediate pressure cylinder, in compress into mouth and be connected with the outlet of described HP steam drum, pressure drum respectively; The import of described turbine low pressure cylinder is connected with the outlet of described low-pressure drum, and the exhaust outlet of described turbine low pressure cylinder is connected with the import of described condenser, and the condensate water outlet of described condenser is connected with described waste heat boiler; The exhaust outlet of described steam turbine high intermediate pressure cylinder is connected with the outlet of described low-pressure drum and both conjoint outlets are connected with described heat supply network backwater heating system; Described heat supply network backwater heating system comprises steam type absorption heat pump, vapor-water heat exchanger, dosing tank; Described steam turbine high intermediate pressure cylinder is connected with the import of described steam type absorption heat pump, described vapor-water heat exchanger respectively with the described conjoint outlet of described low-pressure drum; Described steam type absorption heat pump is connected with described waste heat boiler with the condensate water outlet of described vapor-water heat exchanger; One secondary net backwater of described heat supply network backwater heating system is connected with the water side-entrance of described condenser, the water side outlet of described condenser respectively; The shower water side-entrance of described steam type absorption heat pump is connected with the condensate water outlet port, bottom of described low temperature direct contact heat transfer chimney, and the shower water side outlet of described steam type absorption heat pump is connected with the spray spout of described low temperature direct contact heat transfer chimney; The water side outlet that water side-entrance and the described boiler tail of described steam type absorption heat pump set up heating surface is connected, and the water side-entrance that water side outlet and the described boiler tail of described steam type absorption heat pump set up heating surface is connected; The outlet at bottom of described dosing tank is connected with the shower water side-entrance of described steam type absorption heat pump; The primary side import of described thermal substation is connected with the water side outlet of described vapor-water heat exchanger, and the primary side outlet of described thermal substation is connected with the water side-entrance of described condenser.
Described heat supply network backwater heating system also comprises the first water water-to-water heat exchanger; Water side-entrance, the water side outlet of described first water water-to-water heat exchanger are all connected with a described secondary net backwater; The described water side-entrance of the first water water-to-water heat exchanger is connected with the water side outlet of described condenser, the described water side outlet of the first water water-to-water heat exchanger is connected with the water side-entrance of described condenser, and the water side outlet of described first water water-to-water heat exchanger is connected with the water side-entrance of described steam type absorption heat pump, the water side-entrance of described vapor-water heat exchanger respectively; Described waste heat boiler also comprises middle temperature direct contact heat transfer section, and described middle temperature direct contact heat transfer section is positioned at described boiler tail and sets up between heating surface and low temperature direct contact heat transfer chimney; The condensate water outlet port, bottom of described middle temperature direct contact heat transfer section is connected with the shower water side-entrance of described first water water-to-water heat exchanger, and the shower water side outlet of described first water water-to-water heat exchanger is connected with the spray spout of described middle temperature direct contact heat transfer section; The shower water side-entrance of described first water water-to-water heat exchanger is also connected with the outlet at bottom of described dosing tank.
Described thermal substation comprises absorption heat exchange unit and device is adjusted at heat pump peak; The primary side import of described absorption heat exchange unit is connected with the water side outlet of described vapor-water heat exchanger, primary side low-temperature return water interface and the described heat pump peak of described absorption heat exchange unit adjust the primary side import of device to be connected, and described heat pump peak adjusts the outlet of the primary side of device to be connected with the water side-entrance of described condenser; The secondary network backwater of described thermal substation adjusts the secondary side low-temperature return water interface of device to be connected with the secondary side low-temperature return water interface of described absorption heat exchange unit, described heat pump peak respectively; The secondary network of described thermal substation supplies water and adjusts the secondary side water supply interface of device to be connected with the secondary side low-temperature return water interface of the secondary side water supply interface of described absorption heat exchange unit, described absorption heat exchange unit, described heat pump peak respectively.
Described thermal substation comprises the second water water-to-water heat exchanger, and the described primary side import of the second water water-to-water heat exchanger is connected with the water side outlet of described vapor-water heat exchanger, and the primary side low-temperature return water interface of described second water water-to-water heat exchanger is connected with the water side-entrance of described condenser; The secondary network backwater of described thermal substation is connected with the secondary side low-temperature return water interface of described second water water-to-water heat exchanger, and the secondary network of described thermal substation supplies water and is connected with the secondary side water supply interface of described second water water-to-water heat exchanger.
Described thermal substation comprises the second water water-to-water heat exchanger and device is adjusted at heat pump peak; The described primary side import of the second water water-to-water heat exchanger is connected with the water side outlet of described vapor-water heat exchanger, primary side low-temperature return water interface and the described heat pump peak of described second water water-to-water heat exchanger adjust the primary side import of device to be connected, and described heat pump peak adjusts the outlet of the primary side of device to be connected with the water side-entrance of described condenser; The secondary network backwater of described thermal substation adjusts the secondary side low-temperature return water interface of device to be connected with the secondary side low-temperature return water interface of described second water water-to-water heat exchanger, described heat pump peak respectively; The secondary network of described thermal substation supplies water and adjusts the secondary side water supply interface of device to be connected with the secondary side water supply interface of described second water water-to-water heat exchanger, the secondary side low-temperature return water interface of described second water water-to-water heat exchanger, described heat pump peak respectively.
The water side outlet that described boiler tail sets up heating surface is connected with the water side-entrance of described condenser and/or described water water-to-water heat exchanger, and the water side-entrance that described boiler tail sets up heating surface is connected with the water side outlet of described condenser and/or described water water-to-water heat exchanger.
The spray spout of described low temperature direct contact heat transfer chimney is multiple and is distributed in many rows.
The spray spout of described middle temperature direct contact heat transfer section is multiple and is distributed in many rows.
The utility model is owing to taking above technical scheme, it has the following advantages: the heating system and the corresponding intrument that the utility model proposes the integrated end peak regulation of a kind of gas cogeneration, in steam power plant, for the problem that gas power station waste heat amount large (flue gas+exhaust steam) difficulty reclaims, the method of return water temperature is reduced further by end, heat supply network backwater is reduced to 10 DEG C even lower, is realized whole recovery of fume afterheat and exhaust steam residual heat by low-temperature return water; In steam power plant, for the feature (environment temperature will be reduced to from about 100 DEG C) that the flue gas temperature difference is large, adopt segmentation waste heat recovery mode, flue gas is divided into three sections (even multistages), the corresponding different operating mode of the waste heat amount reclaimed reclaims step by step, reduce heat transfer temperature difference, reduce diabatic process irreversible loss.In the implementation of segmentation removal process, adopt by flue-gas temperature feature, adopt one section of high temperature wall-type heat exchange, the integrated mode of warm direct contact heat transfer, three sections of low temperature direct contact heat transfers in two sections, realize the best configuration of system fume afterheat utilization.2, the utility model is in the structure of segmentation Mist heat recovering, waste heat boiler version is complied with in employing, adopt increase wall-type heat exchange along flue gas flow channel at back-end surfaces, in the junction of waste heat boiler afterbody and flue increases warm direct contact heat transfer section, in chimney, increase the structure of low temperature direct contact heat transfer section, do not need huge extraction flue and the occupation of land of flue gas condensing heat exchanger.3, the utility model arranges chemicals dosing plant on segmentation flue gas waste heat recovery spray water route, while waste heat recovery, realize the effect of washing flue gas, reach good denitration effect, neutralize acid condensate water simultaneously, reach discharge standard, integrate waste heat recovery, low-nitrogen discharged.4, the utility model is at heating system end thermal substation place, adopt the mode of the distributed peak regulation of end, utilize electric heat pump or gas complementary combustion type absorption heat pump end peak regulation, at the little fuel of most cold day consumption or electricity, just significantly can increase heat capacity; Simultaneously, end peak regulation heating load is without the large net conveying of basic load, combustion gas or electricity is used to be delivered to end, conveying capacity improves, significantly improve conveying capacity, absorption heat exchange unit (large temperature difference heat exchanger) is adopted at end, pipe network conveying capacity is improved further, while end peak regulation, electric heat pump or gas complementary combustion type absorption heat pump play the effect reducing return water temperature simultaneously, make return water temperature can reach 10 DEG C even lower, make steam power plant's waste heat recovery more easy; Meanwhile, add the security of heat supply, be equivalent to heating system with multi-eat sources, be conducive to thermodynamic equilibrium and the hydraulic equilibrium of the whole network.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the utility model embodiment one;
The schematic flow sheet of the real the utility model embodiment two of Fig. 2;
The schematic flow sheet of the real the utility model embodiment three of Fig. 3.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in detail.
Embodiment one:
The utility model proposes a kind of novel gas cogeneration of heat and power central heating device, it comprises Combined cycle gas-steam turbine system, heat supply network backwater heating system, thermal substation and each connecting line and valve, and Combined cycle gas-steam turbine system is connected with thermal substation by heat supply network backwater heating system.
As shown in Figure 1, described Combined cycle gas-steam turbine system comprises air compressor 1, gas turbine 2, combustion chamber 3, steam turbine high intermediate pressure cylinder 4, turbine low pressure cylinder 5, condenser 6 and waste heat boiler 7.Wherein, in waste heat boiler 7, be provided with boiler tail set up heating surface 8, the end of waste heat boiler 7 is provided with low temperature direct contact heat transfer chimney 9, set up at boiler tail be provided with in the waste heat boiler 7 between heating surface 8 and low temperature direct contact heat transfer chimney 9 in warm direct contact heat transfer section 10.HP steam drum 11, middle pressure drum 12 and low-pressure drum 13 is provided with in the inside of waste heat boiler 7.The outlet of air compressor 1 is connected with the import of combustion chamber 3, and the outlet of combustion chamber 3 is connected with the import of gas turbine 2, and the outlet of gas turbine 2 is connected with the import of waste heat boiler 7.The high-pressure inlet of steam turbine high intermediate pressure cylinder 4, in compress into mouth and be connected with the outlet of HP steam drum 11, pressure drum 12 respectively.The import of turbine low pressure cylinder 5 is connected with the outlet of low-pressure drum 13.The exhaust outlet of turbine low pressure cylinder 5 is connected with the import of condenser 6, and the condensate water outlet of condenser 6 is connected with waste heat boiler 7.The exhaust outlet of steam turbine high intermediate pressure cylinder 4 is connected with the outlet of low-pressure drum 13 and both conjoint outlets are connected with heat supply network backwater heating system.
Heat supply network backwater heating system comprises steam type absorption heat pump 14, vapor-water heat exchanger 15, water water-to-water heat exchanger 16 and dosing tank 17.Steam turbine high intermediate pressure cylinder 5 is connected with the import of steam type absorption heat pump 14, vapor-water heat exchanger 15 respectively with the conjoint outlet of low-pressure drum 13.Steam type absorption heat pump 14 is connected with waste heat boiler 7 with the condensate water outlet of vapor-water heat exchanger 15.One secondary net backwater of heat supply network backwater heating system is connected with the water side-entrance of condenser 6, the water side outlet of condenser 6, the water side-entrance of water water-to-water heat exchanger 16, the water side outlet of water water-to-water heat exchanger 16 respectively.The water side-entrance of water water-to-water heat exchanger 16 is connected with the water side outlet of condenser 6, the water side outlet of water water-to-water heat exchanger 16 is connected with the water side-entrance of condenser 6, and the water side outlet of water water-to-water heat exchanger 16 is connected with the water side-entrance of steam type absorption heat pump 14, the water side-entrance of vapor-water heat exchanger 15 respectively.The shower water side outlet of water water-to-water heat exchanger 16 is connected with the spray spout of middle temperature direct contact heat transfer section 10, and the shower water side-entrance of water water-to-water heat exchanger 16 is connected with the condensate water outlet port, bottom of middle temperature direct contact heat transfer section 10.The shower water side-entrance of steam type absorption heat pump 14 is connected with the condensate water outlet port, bottom of low temperature direct contact heat transfer chimney 9, and the shower water side outlet of steam type absorption heat pump 14 is connected with the spray spout of low temperature direct contact heat transfer chimney 9.The water side outlet that water side-entrance and the boiler tail of steam type absorption heat pump 14 set up heating surface 8 is connected, and the water side-entrance that water side outlet and the boiler tail of steam type absorption heat pump 14 set up heating surface 8 is connected.The outlet at bottom of dosing tank 17 is connected with the shower water side-entrance of water water-to-water heat exchanger 16, the shower water side-entrance of steam type absorption heat pump 14 respectively.
Thermal substation comprises absorption heat exchange unit 18 and device 19 is adjusted at heat pump peak.The primary side import of absorption heat exchange unit 18 is connected with the water side outlet of vapor-water heat exchanger 15, primary side low-temperature return water interface and the heat pump peak of absorption heat exchange unit 18 adjust the primary side import of device 19 to be connected, and heat pump peak adjusts the outlet of the primary side of device 19 to be connected with the water side-entrance of condenser 6.The secondary network backwater of thermal substation adjusts the secondary side low-temperature return water interface of device 19 to be connected with the secondary side low-temperature return water interface of absorption heat exchange unit 18, heat pump peak respectively.The secondary network of thermal substation supplies water and adjusts the secondary side water supply interface of device 19 to be connected with the secondary side water supply interface of absorption heat exchange unit 18, the secondary side low-temperature return water interface of absorption heat exchange unit 18, heat pump peak respectively.
In above-described embodiment, adopt synchronous from shift clutch between steam turbine high intermediate pressure cylinder 4 and turbine low pressure cylinder 5, when not arranging condenser 6 in system, system does not reclaim exhaust steam residual heat, a Mist heat recovering.Different according to the return water temperature of the utility model device, also may not need the middle temperature direct contact heat transfer section 10 of water water-to-water heat exchanger 16 and correspondence.
In above-described embodiment, the spray spout of low temperature direct contact heat transfer chimney 9 can be multiple and be distributed in many rows.
In above-described embodiment, the spray spout of middle temperature direct contact heat transfer section 10 can also be multiple and be distributed in many rows.
In above-described embodiment, heat pump peak adjusts device 19 can be that electric heat pump peak adjusts device or Gas Direct-fired type heat pump peak to adjust device.
Workflow of the present utility model is as follows: as shown in Figure 1, air enters combustion chamber 3 with combustion gas mixing after air compressor 1 compresses, gas turbine 2 acting generating is entered after Thorough combustion, the flue gas of gas turbine 2 enters in waste heat boiler 7, heating water produces high, medium and low voltage steam respectively, high steam and middle pressure steam enter steam turbine high intermediate pressure cylinder 4 respectively and continue generating, enter turbine low pressure cylinder 5 and continue to generate electricity after the exhaust of steam turbine high intermediate pressure cylinder 4 and low-pressure steam converge.The simultaneously exhaust of steam turbine high intermediate pressure cylinder 4 is drawn out of the heat source of driving heat source respectively as steam type absorption heat pump 14 and vapor-water heat exchanger 15, and after heat exchange, condensate water is got back in waste heat boiler 7 and heated.Condensate water can return in waste heat boiler 7 after the heating of middle multi-stage backheat link in systems in practice, in the utility model, no longer discuss this part.
One secondary net backwater enters after condenser 6, water water-to-water heat exchanger 16, steam type absorption heat pump 14 and vapor-water heat exchanger 15 heated by step successively, sends into a water supply network.In this link, a secondary net backwater can also be introduced into water water-to-water heat exchanger 16 and enter condenser 6 again, or a point two-way enters water water-to-water heat exchanger 16 and condenser 6 respectively.Hot net water, before entering steam type absorption heat pump 14, parallel connection can go out a road and enters waste heat boiler afterbody and set up heating surface 8, converge after being heated with hot net water again.Waste heat boiler afterbody is set up heating surface 8 and is not limited to and only connects with the gateway, water side of steam type absorption heat pump 14, also can connect with the gateway, water side of condenser 6 or water water-to-water heat exchanger 16, become heated relationship in parallel.
The flue gas of waste heat boiler then successively through afterbody set up change heating surface 8, middle temperature direct contact heat transfer section 10, low temperature direct contact heat transfer chimney 9 after discharge.In utilizing pump to extract out, bottom warm direct contact heat transfer section 10, condensate water is squeezed in water water-to-water heat exchanger 16, after heat being put feedwater water-to-water heat exchanger 16, shower water temperature reduces gets back in middle temperature direct contact heat transfer section 10, spray, flue-gas temperature is reduced, shower water temperature rise continues to be drawn out of, and forms a circulation.Utilize pump condensate water bottom low temperature direct contact heat transfer chimney 9 to be squeezed in steam type absorption heat pump 14 and do low-grade heat source, by thermal release to after heat pump, water temperature reduces gets back in low temperature direct contact heat transfer chimney 9, spray, flue-gas temperature is reduced further, shower water temperature rise continues to be drawn out of, and forms another circulation.The concept that this flue gas is lowered the temperature step by step is all protected in the utility model, is not limited to three sections described herein, can lower the temperature by multistage, reduces heat transfer temperature difference, reduce loss.Spray section can adopt with flue gas to spraying or intersecting the form sprayed, and comply with the favorably situated design of flue, can adopt the version of individual layer or Multi-layer sprinkling, nozzle can divide many rows multiple.In order to strengthen heat-transfer effect, the mode heat and mass transfer enhancement process increasing filler can also be adopted.
After Chu Liao steam power plant, high-temperature-hot-water delivers to thermal substation user place through a secondary net, and enter after absorption heat exchange unit 18 reduces return water temperature, then enter heat pump peak adjusting device 19, return water temperature reduces further, can drop to 10 DEG C even lower, get back to power plant.Secondary network backwater can divide two-way to be heated by heat pump peak adjusting device 19 and absorption heat exchange unit 18 respectively, also can adopt the mode that step heats, and after namely first being heated by heat pump peak adjusting device 19, then enters absorption heat exchange unit 18 and is heated.Heat pump peak adjusting device 19 runs at freeze-up, also plays the effect reducing heat supply network return water temperature, make waste heat recovery in power plant more thorough while consuming a small amount of electricity or combustion gas increase heating load.Meanwhile, the pattern of this end peak regulation allows steam power plant bear basic heat supply base load, and Peak Load directly adds in secondary pipe network, and the conveying capacity of a secondary net significantly improves.Meanwhile, add the security of heat supply, be equivalent to heating system with multi-eat sources, be conducive to thermodynamic equilibrium and the hydraulic equilibrium of the whole network.
Dosing tank 17 outlet at bottom sprays side spray trickle entrance with water water-to-water heat exchanger 16 and steam type absorption heat pump 14 respectively and connects, and adds in water-spray system, plays the effect that neutralization solution acidity reduces NOx emission simultaneously.Basin bottom of condensing bottom middle temperature direct contact heat transfer section 10 and low temperature direct contact heat transfer chimney 9 arranges lime set outlet, and condensate liquid is discharged from this mouth.Form a kind of recycling treatment system collecting waste heat recovery and denitration one.
Embodiment two:
Fig. 2 gives another kind of embodiment of the present utility model.The present embodiment and embodiment one difference are: when thermal power station secondary side is low-temperature heat supply mode, thermal substation only comprises conventional water water-to-water heat exchanger 20, the primary side import of water water-to-water heat exchanger 20 is connected with the water side outlet of vapor-water heat exchanger 15, and the primary side low-temperature return water interface of water water-to-water heat exchanger 20 is connected with the water side-entrance of condenser 6; The secondary network backwater of thermal substation is connected with the secondary side low-temperature return water interface of water water-to-water heat exchanger 20, and the secondary network of thermal substation supplies water and is connected with the secondary side water supply interface of water water-to-water heat exchanger 20.
Workflow is as follows: after hot water Chu Liao steam power plant, and high-temperature-hot-water delivers to thermal substation user place through a secondary net, enters after water water-to-water heat exchanger 20 reduces return water temperature and gets back to power plant.
Embodiment three:
Fig. 3 gives the third embodiment of the present utility model.The present embodiment and embodiment one difference are: when thermal power station secondary side is low-temperature heat supply mode, and thermal substation comprises conventional water water-to-water heat exchanger 20 and device 19 is adjusted at heat pump peak; The primary side import of water water-to-water heat exchanger 20 is connected with the water side outlet of vapor-water heat exchanger 15, primary side low-temperature return water interface and the heat pump peak of water water-to-water heat exchanger 20 adjust the primary side import of device 19 to be connected, and heat pump peak adjusts the outlet of the primary side of device 19 to be connected with the water side-entrance of condenser 6; The secondary network backwater of thermal substation adjusts the secondary side low-temperature return water interface of device 19 to be connected with the secondary side low-temperature return water interface of water water-to-water heat exchanger 20, heat pump peak respectively; The secondary network of thermal substation supplies water and adjusts the secondary side water supply interface of device 19 to be connected with the secondary side water supply interface of water water-to-water heat exchanger 20, the secondary side low-temperature return water interface of water water-to-water heat exchanger 20, heat pump peak respectively.
Workflow is as follows: after Chu Liao steam power plant, and hot water delivers to thermal substation user place through a secondary net, enters after water water-to-water heat exchanger 20 reduces return water temperature, enter heat pump peak adjusting device 19 again, return water temperature reduces further, can drop to 10 DEG C even lower, get back to power plant.Secondary network backwater can divide two-way to be heated by heat pump peak adjusting device 19 and water water-to-water heat exchanger 20 respectively, also can adopt the mode that step heats, and after namely first being heated by heat pump peak adjusting device 19, then enters water water-to-water heat exchanger 20 and is heated.
The utility model is only described with above-described embodiment; the structure of each parts, setting position and connection thereof all can change to some extent; on the basis of technical solutions of the utility model; all improvement of carrying out individual part according to the utility model principle and equivalents, all should not get rid of outside protection domain of the present utility model.
Claims (8)
1. a novel gas cogeneration of heat and power central heating device, it is characterized in that: it comprises Combined cycle gas-steam turbine system, heat supply network backwater heating system and thermal substation, described Combined cycle gas-steam turbine system is connected with described thermal substation by described heat supply network backwater heating system;
Described Combined cycle gas-steam turbine system comprises air compressor, gas turbine, combustion chamber, steam turbine high intermediate pressure cylinder, turbine low pressure cylinder, condenser and waste heat boiler; Wherein, described waste heat boiler is provided with boiler tail and sets up heating surface, and the end of described waste heat boiler is provided with low temperature direct contact heat transfer chimney; HP steam drum, middle pressure drum and low-pressure drum is provided with in the inside of described waste heat boiler; The outlet of described air compressor is connected with the import of described combustion chamber, and the outlet of described combustion chamber is connected with the import of described gas turbine, and the outlet of described gas turbine is connected with the import of described waste heat boiler; The high-pressure inlet of described steam turbine high intermediate pressure cylinder, in compress into mouth and be connected with the outlet of described HP steam drum, pressure drum respectively; The import of described turbine low pressure cylinder is connected with the outlet of described low-pressure drum, and the exhaust outlet of described turbine low pressure cylinder is connected with the import of described condenser, and the condensate water outlet of described condenser is connected with described waste heat boiler; The exhaust outlet of described steam turbine high intermediate pressure cylinder is connected with the outlet of described low-pressure drum and both conjoint outlets are connected with described heat supply network backwater heating system;
Described heat supply network backwater heating system comprises steam type absorption heat pump, vapor-water heat exchanger, dosing tank; Described steam turbine high intermediate pressure cylinder is connected with the import of described steam type absorption heat pump, described vapor-water heat exchanger respectively with the described conjoint outlet of described low-pressure drum; Described steam type absorption heat pump is connected with described waste heat boiler with the condensate water outlet of described vapor-water heat exchanger; One secondary net backwater of described heat supply network backwater heating system is connected with the water side-entrance of described condenser, the water side outlet of described condenser respectively; The shower water side-entrance of described steam type absorption heat pump is connected with the condensate water outlet port, bottom of described low temperature direct contact heat transfer chimney, and the shower water side outlet of described steam type absorption heat pump is connected with the spray spout of described low temperature direct contact heat transfer chimney; The water side outlet that water side-entrance and the described boiler tail of described steam type absorption heat pump set up heating surface is connected, and the water side-entrance that water side outlet and the described boiler tail of described steam type absorption heat pump set up heating surface is connected; The outlet at bottom of described dosing tank is connected with the shower water side-entrance of described steam type absorption heat pump;
The primary side import of described thermal substation is connected with the water side outlet of described vapor-water heat exchanger, and the primary side outlet of described thermal substation is connected with the water side-entrance of described condenser.
2. novel gas cogeneration of heat and power central heating device as claimed in claim 1, is characterized in that: described heat supply network backwater heating system also comprises the first water water-to-water heat exchanger; Water side-entrance, the water side outlet of described first water water-to-water heat exchanger are all connected with a described secondary net backwater; The described water side-entrance of the first water water-to-water heat exchanger is connected with the water side outlet of described condenser, the described water side outlet of the first water water-to-water heat exchanger is connected with the water side-entrance of described condenser, and the water side outlet of described first water water-to-water heat exchanger is connected with the water side-entrance of described steam type absorption heat pump, the water side-entrance of described vapor-water heat exchanger respectively; Described waste heat boiler also comprises middle temperature direct contact heat transfer section, and described middle temperature direct contact heat transfer section is positioned at described boiler tail and sets up between heating surface and low temperature direct contact heat transfer chimney; The condensate water outlet port, bottom of described middle temperature direct contact heat transfer section is connected with the shower water side-entrance of described first water water-to-water heat exchanger, and the shower water side outlet of described first water water-to-water heat exchanger is connected with the spray spout of described middle temperature direct contact heat transfer section; The shower water side-entrance of described first water water-to-water heat exchanger is also connected with the outlet at bottom of described dosing tank.
3. novel gas cogeneration of heat and power central heating device as claimed in claim 2, is characterized in that: described thermal substation comprises absorption heat exchange unit and device is adjusted at heat pump peak; The primary side import of described absorption heat exchange unit is connected with the water side outlet of described vapor-water heat exchanger, primary side low-temperature return water interface and the described heat pump peak of described absorption heat exchange unit adjust the primary side import of device to be connected, and described heat pump peak adjusts the outlet of the primary side of device to be connected with the water side-entrance of described condenser; The secondary network backwater of described thermal substation adjusts the secondary side low-temperature return water interface of device to be connected with the secondary side low-temperature return water interface of described absorption heat exchange unit, described heat pump peak respectively; The secondary network of described thermal substation supplies water and adjusts the secondary side water supply interface of device to be connected with the secondary side low-temperature return water interface of the secondary side water supply interface of described absorption heat exchange unit, described absorption heat exchange unit, described heat pump peak respectively.
4. novel gas cogeneration of heat and power central heating device as claimed in claim 2, it is characterized in that: described thermal substation comprises the second water water-to-water heat exchanger, the described primary side import of the second water water-to-water heat exchanger is connected with the water side outlet of described vapor-water heat exchanger, and the primary side low-temperature return water interface of described second water water-to-water heat exchanger is connected with the water side-entrance of described condenser; The secondary network backwater of described thermal substation is connected with the secondary side low-temperature return water interface of described second water water-to-water heat exchanger, and the secondary network of described thermal substation supplies water and is connected with the secondary side water supply interface of described second water water-to-water heat exchanger.
5. novel gas cogeneration of heat and power central heating device as claimed in claim 2, is characterized in that: described thermal substation comprises the second water water-to-water heat exchanger and device is adjusted at heat pump peak; The described primary side import of the second water water-to-water heat exchanger is connected with the water side outlet of described vapor-water heat exchanger, primary side low-temperature return water interface and the described heat pump peak of described second water water-to-water heat exchanger adjust the primary side import of device to be connected, and described heat pump peak adjusts the outlet of the primary side of device to be connected with the water side-entrance of described condenser; The secondary network backwater of described thermal substation adjusts the secondary side low-temperature return water interface of device to be connected with the secondary side low-temperature return water interface of described second water water-to-water heat exchanger, described heat pump peak respectively; The secondary network of described thermal substation supplies water and adjusts the secondary side water supply interface of device to be connected with the secondary side water supply interface of described second water water-to-water heat exchanger, the secondary side low-temperature return water interface of described second water water-to-water heat exchanger, described heat pump peak respectively.
6. novel gas cogeneration of heat and power central heating device as claimed in claim 2, it is characterized in that: the water side outlet that described boiler tail sets up heating surface is connected with the water side-entrance of described condenser and/or described water water-to-water heat exchanger, the water side-entrance that described boiler tail sets up heating surface is connected with the water side outlet of described condenser and/or described water water-to-water heat exchanger.
7. novel gas cogeneration of heat and power central heating device as claimed in claim 1 or 2, is characterized in that: the spray spout of described low temperature direct contact heat transfer chimney is multiple and is distributed in many rows.
8. novel gas cogeneration of heat and power central heating device as claimed in claim 2, is characterized in that: the spray spout of described middle temperature direct contact heat transfer section is multiple and is distributed in many rows.
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| CN201520873894.5U CN205119199U (en) | 2015-11-04 | 2015-11-04 | Novel gas cogeneration of heat and power central heating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222203A (en) * | 2015-11-04 | 2016-01-06 | 清华大学 | A kind of novel gas cogeneration of heat and power central heating device |
| CN109737440A (en) * | 2019-02-28 | 2019-05-10 | 济南市市政工程设计研究院（集团）有限责任公司 | A kind of boiler smoke depth residual neat recovering system and method |
-
2015
- 2015-11-04 CN CN201520873894.5U patent/CN205119199U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222203A (en) * | 2015-11-04 | 2016-01-06 | 清华大学 | A kind of novel gas cogeneration of heat and power central heating device |
| CN109737440A (en) * | 2019-02-28 | 2019-05-10 | 济南市市政工程设计研究院（集团）有限责任公司 | A kind of boiler smoke depth residual neat recovering system and method |
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