CN103759316A - Cascade heating system for heat supply network circulation water - Google Patents

Cascade heating system for heat supply network circulation water Download PDF

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Publication number
CN103759316A
CN103759316A CN201310747811.3A CN201310747811A CN103759316A CN 103759316 A CN103759316 A CN 103759316A CN 201310747811 A CN201310747811 A CN 201310747811A CN 103759316 A CN103759316 A CN 103759316A
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China
Prior art keywords
steam
communicated
water
heat
heat supply
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Pending
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CN201310747811.3A
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Chinese (zh)
Inventor
赵耀华
王新平
周岩
刘闯
卜江东
范勇
崔图林
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China Energy Engineering Group Shanxi Electric Power Engineering Co Ltd
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China Energy Engineering Group Shanxi Electric Power Engineering Co Ltd
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Priority to CN201310747811.3A priority Critical patent/CN103759316A/en
Publication of CN103759316A publication Critical patent/CN103759316A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a cascade heating system for heat supply network circulation water and solves the technical problems of large heat pump investment and small exhaust steam recovery amount of prior heating systems. Heat supply network circulation water enters a heat pump after primary heating by exhaust gas in a front condenser, the heat pump absorbs exhaust gas waste heat under the drive of high-temperature steam to perform secondary heating on the heat supply network circulation water, and the heat supply network circulation water enters a steam-water heat exchanger after being pressurized by a circulation water pump and is subjected to tertiary heating by the high-temperature steam in the steam-water heat exchanger to be supplied to heat users. By means of the system, cascade utilization of steam turbine exhaust gas is used for heat supply, so that the power plant heat supply coal consumption is greatly reduced, and the energy-saving and emission-reduction effect is apparent.

Description

The step heating system of heat supply network recirculated water
Technical field
The present invention relates to a kind of by the device of heat supply network circulating water heating, particularly a kind of heat supply network circulating water heating system of passing through three grades of heating.
Background technology
At present, Direct-air-cooling Power Plants all adopts absorption heat pump to add the heating system of vapor-water heat exchanger.The waste heat that first heat supply network recirculated water reclaim in exhaust steam by heat pump heats, and after water circulating pump pressurization, enters vapor-water heat exchanger, is supplied with hot user after post bake.The recyclable exhaust steam residual heat of this system is used for heat supply, but does not make full use of Direct Air-cooled Unit heat supply network recirculated water return water temperature lower than the feature of exhaust steam temperature, has wasted thermal source.
Summary of the invention
The invention provides a kind of step heating system of heat supply network recirculated water, the heat pump that has solved existing heating system existence is invested large and the little technical problem of exhaust steam yield.
The present invention solves above technical problem by the following technical programs:
A kind of step heating system of heat supply network recirculated water, comprise hot user's water tank, preposition condenser, absorption heat pump, water circulating pump and vapor-water heat exchanger, the delivery port of hot user's water tank is communicated with the water inlet of preposition condenser, the delivery port of preposition condenser is communicated with the water inlet of absorption heat pump, the delivery port of absorption heat pump is communicated with the water inlet of vapor-water heat exchanger by water circulating pump, and the delivery port of vapor-water heat exchanger is communicated with the water inlet of hot user's water tank; The exhaust steam outlet of steam turbine is communicated with the first end of exhaust steam threeway, the second end of exhaust steam threeway is communicated with air radiator, the 3rd end of exhaust steam threeway is communicated with the first end of exhaust steam arm threeway, the second end of exhaust steam arm threeway is communicated with the steam ports that enters of preposition condenser, the venthole of preposition condenser is communicated with steam exhaust device, the 3rd end of exhaust steam arm threeway enters steam ports with first of absorption heat pump and is communicated with, and the first venthole of absorption heat pump is communicated with steam exhaust device; The steam (vapor) outlet of steam turbine is communicated with the first end of steam threeway, and the second end of steam threeway is communicated with the steam inlet of vapor-water heat exchanger, and the steam (vapor) outlet of vapor-water heat exchanger is communicated with steam exhaust device.
The 3rd end of steam threeway enters steam ports with second of absorption heat pump and is communicated with, and the second venthole of absorption heat pump is communicated with steam exhaust device.
The present invention is first by the heating of preposition condenser one-level, the heating of absorption heat pump secondary, finally supply with hot user after entering three grades of heating of vapor-water heat exchanger by heat supply network recirculated water backwater, to realize the heat supply of cascade utilization exhaust steam in steam turbine, the heat supply coal consumption that greatly reduces power plant, effects of energy saving and emission reduction is remarkable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail:
A kind of step heating system of heat supply network recirculated water, comprise hot user's water tank 1, preposition condenser 2, absorption heat pump 3, water circulating pump 4 and vapor-water heat exchanger 5, the delivery port of hot user's water tank 1 is communicated with the water inlet of preposition condenser 2, the delivery port of preposition condenser 2 is communicated with the water inlet of absorption heat pump 3, the delivery port of absorption heat pump 3 is communicated with the water inlet of vapor-water heat exchanger 5 by water circulating pump 4, and the delivery port of vapor-water heat exchanger 5 is communicated with the water inlet of hot user's water tank 1; The exhaust steam outlet of steam turbine 6 is communicated with the first end of exhaust steam threeway 9, the second end of exhaust steam threeway 9 is communicated with air radiator 7, the 3rd end of exhaust steam threeway 9 is communicated with the first end of exhaust steam arm threeway 11, the second end of exhaust steam arm threeway 11 is communicated with the steam ports that enters of preposition condenser 2, the venthole of preposition condenser 2 is communicated with steam exhaust device 8, the 3rd end of exhaust steam arm threeway 11 enters steam ports with first of absorption heat pump 3 and is communicated with, and the first venthole of absorption heat pump 3 is communicated with steam exhaust device 8; The steam (vapor) outlet of steam turbine 6 is communicated with the first end of steam threeway 10, and the second end of steam threeway 10 is communicated with the steam inlet of vapor-water heat exchanger 5, and the steam (vapor) outlet of vapor-water heat exchanger 5 is communicated with steam exhaust device 8.
The 3rd end of steam threeway 10 enters steam ports with second of absorption heat pump 3 and is communicated with, and the second venthole of absorption heat pump 3 is communicated with steam exhaust device 8.
Heat supply network recirculated water enters heat pump after being heated for the first time by the exhaust steam in preposition condenser, under the driving of high-temperature steam, heat pump absorption exhaust steam residual heat heats for the second time to heat supply network recirculated water, afterwards, heat supply network recirculated water enters vapor-water heat exchanger after being recycled water pump pressurization, after being heated for the third time, supplies with hot user in vapor-water heat exchanger by high-temperature steam.Heat supply network recirculated water return water temperature is according to 45 ℃ of considerations; Winter main steam turbine exhaust pressure 15kPa, 54 ℃ of corresponding saturation temperatures.Heat supply network recirculated water can elevate the temperature 6 ℃ with exhaust steam direct heat transfer in preposition condenser, thereby realizes exhaust steam direct heating object.Especially in initial stage and latter stage of Heating Season, hot user requires very low general approximately 70 ℃ of left and right to supply water temperature, and the effect of preposition condenser is more obvious, as long as high-temperature steam seldom can meet for heat request, the heat supply coal consumption that greatly reduces power plant, effects of energy saving and emission reduction is remarkable.

Claims (2)

1. the step heating system of a heat supply network recirculated water, comprise hot user's water tank (1), preposition condenser (2), absorption heat pump (3), water circulating pump (4) and vapor-water heat exchanger (5), it is characterized in that, the delivery port of hot user's water tank (1) is communicated with the water inlet of preposition condenser (2), the delivery port of preposition condenser (2) is communicated with the water inlet of absorption heat pump (3), the delivery port of absorption heat pump (3) is communicated with the water inlet of vapor-water heat exchanger (5) by water circulating pump (4), the delivery port of vapor-water heat exchanger (5) is communicated with the water inlet of hot user's water tank (1), the exhaust steam outlet of steam turbine (6) is communicated with the first end of exhaust steam threeway (9), the second end of exhaust steam threeway (9) is communicated with air radiator (7), the 3rd end of exhaust steam threeway (9) is communicated with the first end of exhaust steam arm threeway (11), the second end of exhaust steam arm threeway (11) is communicated with the steam ports that enters of preposition condenser (2), the venthole of preposition condenser (2) is communicated with steam exhaust device (8), the 3rd end of exhaust steam arm threeway (11) enters steam ports with first of absorption heat pump (3) and is communicated with, the first venthole of absorption heat pump (3) is communicated with steam exhaust device (8), the steam (vapor) outlet of steam turbine (6) is communicated with the first end of steam threeway (10), and the second end of steam threeway (10) is communicated with the steam inlet of vapor-water heat exchanger (5), and the steam (vapor) outlet of vapor-water heat exchanger (5) is communicated with steam exhaust device (8).
2. the step heating system of a kind of heat supply network recirculated water according to claim 1, it is characterized in that, the 3rd end of steam threeway (10) enters steam ports with second of absorption heat pump (3) and is communicated with, and the second venthole of absorption heat pump (3) is communicated with steam exhaust device (8).
CN201310747811.3A 2013-12-31 2013-12-31 Cascade heating system for heat supply network circulation water Pending CN103759316A (en)

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CN201310747811.3A CN103759316A (en) 2013-12-31 2013-12-31 Cascade heating system for heat supply network circulation water

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CN201310747811.3A CN103759316A (en) 2013-12-31 2013-12-31 Cascade heating system for heat supply network circulation water

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108426460A (en) * 2018-05-21 2018-08-21 马鞍山钢铁股份有限公司 Water at low temperature preparation system suitable for coke oven gas purification system
CN108518716A (en) * 2018-04-19 2018-09-11 联合瑞升(北京)科技有限公司 A kind of thermal power plant's air cooling unit close-coupled exhaust steam residual heat recycling heating system
CN108644860A (en) * 2018-04-19 2018-10-12 联合瑞升(北京)科技有限公司 A kind of larger thermal power air-cooling units exhaust steam residual heat recycling heating system
CN112555108A (en) * 2020-12-17 2021-03-26 中国能源建设集团山西省电力勘测设计院有限公司 Simple heat taking method for efficiently and cleanly utilizing geothermal heat energy
CN112554978A (en) * 2020-11-16 2021-03-26 中国能源建设集团山西省电力勘测设计院有限公司 Supercritical CO2Coupling complementary method for power generation and long-distance steam transmission

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CN202195529U (en) * 2011-05-13 2012-04-18 陈喜报 Power plant waste heat utilization heating system combined technological device
CN103017237A (en) * 2012-12-25 2013-04-03 浙江工商大学 Condensation heat recycle and supply system of power plant
CN203704103U (en) * 2013-12-31 2014-07-09 中国能源建设集团山西省电力勘测设计院 Cascade heating system for heating network circulating water

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1421646A (en) * 2001-11-30 2003-06-04 清华大学 Absorbing heat pump heating equipment to utilize fume afterheat of gas-burning steam-circulating heat and power plant
CN1804512A (en) * 2006-01-23 2006-07-19 李华玉 Energy-saving heating technology capable of utilizing thermodynamic circulation low temperature waste heat and reducing cooling water evaporation
CN101231004A (en) * 2008-02-28 2008-07-30 清华大学 Large temperature-difference central heating system
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108518716A (en) * 2018-04-19 2018-09-11 联合瑞升(北京)科技有限公司 A kind of thermal power plant's air cooling unit close-coupled exhaust steam residual heat recycling heating system
CN108644860A (en) * 2018-04-19 2018-10-12 联合瑞升(北京)科技有限公司 A kind of larger thermal power air-cooling units exhaust steam residual heat recycling heating system
CN108644860B (en) * 2018-04-19 2023-06-30 北京智为蓝科技有限公司 Exhaust steam waste heat recovery heat supply system of air cooling unit of large-scale thermal power plant
CN108426460A (en) * 2018-05-21 2018-08-21 马鞍山钢铁股份有限公司 Water at low temperature preparation system suitable for coke oven gas purification system
CN108426460B (en) * 2018-05-21 2024-01-16 马鞍山钢铁股份有限公司 Low-temperature water preparation system suitable for coke oven gas purification system
CN112554978A (en) * 2020-11-16 2021-03-26 中国能源建设集团山西省电力勘测设计院有限公司 Supercritical CO2Coupling complementary method for power generation and long-distance steam transmission
CN112554978B (en) * 2020-11-16 2023-01-17 中国能源建设集团山西省电力勘测设计院有限公司 Coupling complementary method for supercritical CO2 power generation and long-distance steam transmission
CN112555108A (en) * 2020-12-17 2021-03-26 中国能源建设集团山西省电力勘测设计院有限公司 Simple heat taking method for efficiently and cleanly utilizing geothermal heat energy

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Address after: 030001 Yingze street, Shanxi, No. 255, No.

Applicant after: Co., Ltd of Chinese energy construction group Shanxi Electric Power Exploration & Design Institute

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Application publication date: 20140430