CN105805809A - Novel heating network heater parallel-connection heat supply system - Google Patents
Novel heating network heater parallel-connection heat supply system Download PDFInfo
- Publication number
- CN105805809A CN105805809A CN201610277906.7A CN201610277906A CN105805809A CN 105805809 A CN105805809 A CN 105805809A CN 201610277906 A CN201610277906 A CN 201610277906A CN 105805809 A CN105805809 A CN 105805809A
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- Prior art keywords
- pressure heater
- low
- pressure
- heater
- heating
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/0207—Pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention relates to a novel heating network heater parallel-connection heat supply system. The novel heating network heater parallel-connection heat supply system comprises at least one high-pressure heater and at least one low-pressure heater which are in parallel connection. The high-pressure heaters and the low-pressure heater are each connected with a heating steam extraction pipeline. A small steam turbine is arranged between the low-pressure heater and the corresponding heating steam extraction pipeline. After being subjected to boosting through a heating network circulation water pump, a city heating network backwater pipeline is connected with the high-pressure heaters and the low-pressure heater, and outlets of the high-pressure heaters and an outlet of the low-pressure heater are combined with a heating network water supply main pipe and operates in a municipal heating network for water supply. After passing an electrical conductivity tester, drain pipes of the high-pressure heaters and a drain pipe of the low-pressure heater are connected with a main drain pipe through electric high-pressure drain pumps and an electric low-pressure drain pump correspondingly. According to the novel heating network heater parallel-connection heat supply system, steam exhaust heat and a working medium of the small steam turbine are recycled effectively; the low-pressure heater and the high-pressure heaters operate in parallel connection, so that the heat exchange area of the low-pressure heating network heater is reduced, the initial cost for heat supply reformation of a thermal power plant is lowered, a circulating water pipeline is convenient to arrange, and the novel heating network heater parallel-connection heat supply system is simple.
Description
Technical field
The present invention relates to a kind of heating system, be specifically related to a kind of novel heat exchangers for district heating parallel connection heating system.
Background technology
Traditional heat exchangers for district heating series operation is the supply water temperature that heat supply network recirculated water needs to cities and towns heat supply network again through high-pressure heater heating after low-pressure heater tentatively heats up.
At present, the circulation pump of heat-supply network in the heating system of thermal power plant gradually adopts small-sized back pressure machine to drive.When back pressure machine enters the employing of vapour vapour source higher than heating vapour source pressure, steam discharge can be directly discharged into heat exchangers for district heating；And when adopting low-pressure heating vapour source, owing to back pressure machine exhaust steam pressure is relatively low, for fully reclaiming heat and working medium, low-pressure heater need to be separately provided to receive exhaust steam after steam turbine is done work.In recent years, pure condensate unit changes the mode that thermal power plant unit all adopts high-low pressure heater to be connected in series, and causes low-pressure heater type selecting heat exchange area relatively big, invests higher, and circulation pump of heat-supply network runs water resistance relatively greatly, and wasted work relatively parallel system is high.
Summary of the invention
The technical problem to be solved in the present invention is: existing heating system, and structure is complicated or investment is higher, for solving the problems referred to above, it is provided that a kind of novel heat exchangers for district heating parallel connection heating system.
It is an object of the invention to realize in the following manner:
A kind of novel heat exchangers for district heating parallel connection heating system, including at least one high-pressure heater and at least one low-pressure heater, high-pressure heater and low-pressure heater are arranged in parallel, high-pressure heater and low-pressure heater are all connected to heating extraction line, between low-pressure heater and heating extraction line, are provided with small turbine；City's heat supply network water return pipeline is respectively connected to high-pressure heater and low-pressure heater after circulation pump of heat-supply network boosts, the outlet of high-pressure heater and low-pressure heater imports heat supply network water main pipe and supplies water to municipal administration heat supply network, and the drain pipe of high-pressure heater and low-pressure heater accesses hydrophobic female pipe through driven high voltage drainage pump and electronic low pressure drainage pump respectively after electric conductivity tester.
Heating extraction line includes heating extraction line I and heating extraction line II, and heating extraction line I accesses small turbine, after small turbine does work, accesses low-pressure heater by blow-off line, blow-off line is disposed with check-valves I and electric gate valve.
Heating extraction line II accesses high-pressure heater through electric butterfly valve I.
The pipeline last time that circulation pump of heat-supply network connects with high-pressure heater and low-pressure heater is provided with check-valves II, electric butterfly valve II and motorized adjustment butterfly valve.
High-pressure heater accesses high pressure draining pump by high-pressure heater drain water piping, and low-pressure heater accesses low pressure drainage pump by low-pressure heater aqueduct.
The exit of high-pressure heater and low-pressure heater is respectively arranged with electric butterfly valve III and electric butterfly valve IV.
Relative to prior art, efficient recovery of the present invention small steam turbine exhaust steam heat and working medium, low-pressure heater and high-pressure heater parallel running, not only reduce low pressure heat exchangers for district heating heat exchange area, reduce thermal power plant's heat supply transformation initial cost, and circulating water pipeline is arranged conveniently, system is simple, it is easy to run operation, improves heat-economy and the reliability of heating system, compare series connection heating system and can obtain better district heating economy benefit.
Accompanying drawing explanation
Fig. 1 is the system schematic of the present invention.
Wherein, 1 is small turbine；2 is circulation pump of heat-supply network；3 is high-pressure heater；4 is low-pressure heater；5 is high pressure draining pump；6 is low pressure drainage pump；7 is heating extraction line I；8 is check-valves I；9 is blow-off line；10 is electric gate valve；11 is heating extraction line II；12 is electric butterfly valve I；13 is city's heat supply network water return pipeline；14 is Slow Close Valve II；15 is electric butterfly valve II；16 is motorized adjustment butterfly valve I；17 is electric butterfly valve III；18 is motorized adjustment butterfly valve II；19 is electric butterfly valve IV；20 is heat supply network water main pipe；21 is high-pressure heater drain water piping；22 is low-pressure heater drain water piping；23 is electric conductivity measuring instrument；24 is hydrophobic female pipe.
Detailed description of the invention
As it is shown in figure 1, a kind of novel heat exchangers for district heating parallel connection heating system, mainly include small turbine 1, circulation pump of heat-supply network 2, high-pressure heater 3, low-pressure heater 4, high pressure draining pump 5, low pressure drainage pump 6.Heating extraction line I 7 enters small turbine 1, and after small turbine 1 does work, blow-off line 9 enters low pressure heat exchangers for district heating 4 through check-valves I 8, electric gate valve 10, and another road heating extraction line II 11 enters high-pressure heater 3 through electric butterfly valve I 12.City's heat supply network water return pipeline 13 respectively enters high-pressure heater 3 and low-pressure heater 4 after circulation pump of heat-supply network 2 boosts, circulation pump of heat-supply network 2 outlet connects slow closed check damper II 14 and electric butterfly valve II 15, high-pressure heater 3, low-pressure heater 4 entrance connect motorized adjustment butterfly valve I 16 respectively and motorized adjustment butterfly valve II 18 regulates heater water effluent amount, and high-pressure heater 3, low-pressure heater 4 export and import heat supply network water main pipe 20 supply water to municipal administration heat supply network through completely open and close electric butterfly valve III 17, electric butterfly valve IV 19 respectively.High-pressure heater drain water piping 21, low-pressure heater drain water piping 22 are respectively connected to driven high voltage drainage pump 5 and electronic low pressure drainage pump 6 after electric conductivity measuring instrument 23, hydrophobic female pipe 24 water quality is imported after boosting, qualified hydrophobic of electric conductivity enters big machine oxygen-eliminating device, defective, enters big machine condenser and reclaims.
Low-pressure heater 4 and high-pressure heater 3 adopt parallel system, and heating system refers to Fig. 1.
1) heating system describes in detail:
This heating system capital equipment includes high-low pressure heater, high-low pressure drainage pump, circulation pump of heat-supply network 2, small turbine 1, oxygen-eliminating device etc..
Heating vapour source is by main steam turbine steam supply, draw gas and take from mesolow cylinder communicating pipe, entering high pressure heat exchangers for district heating heating heat supply network recirculated water through motorized adjustment butterfly valve, from the small turbine 1 of mother Guan Lingyin mono-tunnel, heating vapour source steam drive circulation pump of heat-supply network 2, small turbine 1 steam discharge enters low-pressure heater.Heat supply network backwater, by delivering to the circulation Jellyfish pipe into heat exchangers for district heating after circulation pump of heat-supply network 2 boosting, then passes through each heater water side branch, enters high-low pressure heater through motorized adjustment butterfly valve.High-pressure heater 3 is generally arranged in parallel 3 to 4, and low-pressure heater generally arranges 2 to 3, it is contemplated that 1 heater is standby.Heat supply network recirculated water after high-low pressure heater heats enters recirculated water water main pipe after completely open and close electric butterfly valve and delivers to municipal administration heating.
It is hydrophobic that high-low pressure heater is respectively adopted high and low pressure drainage pump, arranges water quality detecting device after drainage pump, carries out full water quality detection to heat supply network is hydrophobic.According to full water quality detection result, when heat supply network drain water quality is qualified, after meeting boiler feed quality, can closing hydrophobic to condenser piping, open to oxygen-eliminating device fast valve, heat supply network is hydrophobic enters oxygen-eliminating device, it is ensured that the operational efficiency of thermal power plant unit.
Conventional scheme heat supply network recirculated water first passes through low-pressure heater 4 and is heated to after 80-100 DEG C and is heated to, then through high pressure heat exchangers for district heating, heat supply temperature 120 or the 130 DEG C of heating that municipal administration needs.Turbine discharge amount type selecting pressed by this programme low-pressure heater 4, directly by entering the heat supply network circulating water heating to 120 or 130 DEG C of low-pressure heater 4, imports heat supply network water main pipe 20 together with high-pressure heater hot net water water outlet, delivers to municipal administration hot duct outside factory.
2) heat exchangers for district heating in parallel runs points for attention
Consider that first heater need to put into operation water side, put into operation again vapour side, in order to avoid heater dry combustion method, therefore the small turbine 1 driving circulation pump of heat-supply network need to arrange startup steam discharge to atmosphere duct, when low-pressure heater 4 switches to steam discharge more gradually to low-pressure heater after setting up the circulation of water side, or startup electric water circulating pump is set replaces starting steam discharge to atmosphere duct.
When high-low pressure heater respectively put into one stable after, when need to put into a high-pressure heater 3 again, it is first turned on heater water side outlet door, after heater is full of water, should slowly heater water side water inlet motorized adjustment butterfly valve, ensure the water side quantity of circulating water of low-pressure heater, causing low-pressure heater shell-side to run overtemperature in order to avoid robbing water, affecting the safe operation of low pressure drainage pump 6.
Owing to low-pressure heater 4 vapour side thermal source is from small turbine 1 steam discharge in actual motion, the steam discharge of small turbine 1 is subject to again water circulating pump and exerts oneself impact, therefore the low-pressure heater outlet more difficult adjustment of circulating water temperature.Consider that low-pressure heater 4 quantity of circulating water is relatively low, account for about the 13% of the global cycle water yield, therefore can pass through to regulate high-pressure heater 3 throttle flow and ensure total heat supply network circulating water heating temperature.
Claims (6)
1. a novel heat exchangers for district heating parallel connection heating system, including at least one high-pressure heater and at least one low-pressure heater, it is characterized in that: high-pressure heater and low-pressure heater are arranged in parallel, high-pressure heater and low-pressure heater are all connected to heating extraction line, between low-pressure heater and heating extraction line, are provided with small turbine；City's heat supply network water return pipeline is respectively connected to high-pressure heater and low-pressure heater after circulation pump of heat-supply network boosts, the outlet of high-pressure heater and low-pressure heater imports heat supply network water main pipe and supplies water to municipal administration heat supply network, and the drain pipe of high-pressure heater and low-pressure heater accesses hydrophobic female pipe through driven high voltage drainage pump and electronic low pressure drainage pump respectively after electric conductivity tester.
2. the novel heat exchangers for district heating parallel connection heating system of one according to claim 1, it is characterized in that: heating extraction line includes heating extraction line I and heating extraction line II, heating extraction line I accesses small turbine, after small turbine does work, access low-pressure heater by blow-off line, blow-off line is disposed with check-valves I and electric gate valve.
3. the novel heat exchangers for district heating parallel connection heating system of one according to claim 2, it is characterised in that: heating extraction line II accesses high-pressure heater through electric butterfly valve I.
4. the novel heat exchangers for district heating parallel connection heating system of one according to claim 1, it is characterised in that: the pipeline last time that circulation pump of heat-supply network connects with high-pressure heater and low-pressure heater is provided with check-valves II, electric butterfly valve II and motorized adjustment butterfly valve.
5. the novel heat exchangers for district heating parallel connection heating system of one according to claim 1, it is characterised in that: high-pressure heater accesses high pressure draining pump by high-pressure heater drain water piping, and low-pressure heater accesses low pressure drainage pump by low-pressure heater aqueduct.
6. the novel heat exchangers for district heating parallel connection heating system of one according to claim 1, it is characterised in that: the exit of high-pressure heater and low-pressure heater is respectively arranged with electric butterfly valve III and electric butterfly valve IV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610277906.7A CN105805809A (en) | 2016-04-29 | 2016-04-29 | Novel heating network heater parallel-connection heat supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610277906.7A CN105805809A (en) | 2016-04-29 | 2016-04-29 | Novel heating network heater parallel-connection heat supply system |
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| CN105805809A true CN105805809A (en) | 2016-07-27 |
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| CN201610277906.7A Pending CN105805809A (en) | 2016-04-29 | 2016-04-29 | Novel heating network heater parallel-connection heat supply system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120713A (en) * | 2017-06-16 | 2017-09-01 | 华电郑州机械设计研究院有限公司 | A kind of anti-overtemperature cooling system of high back pressure thermal power plant unit condensate |
| CN109297074A (en) * | 2018-09-17 | 2019-02-01 | 国网湖南省电力有限公司 | The control method and system of the small steam turbine steam discharge heating system of back pressure type steam-driven induced draft fan |
| CN109520001A (en) * | 2018-12-12 | 2019-03-26 | 沧州华润热电有限公司 | A kind of heat supply network draining system |
| CN109653819A (en) * | 2019-01-24 | 2019-04-19 | 中国电力工程顾问集团东北电力设计院有限公司 | A kind of cogeneration units depth peak regulation steam turbine system and control method |
| CN110500637A (en) * | 2019-06-27 | 2019-11-26 | 华电郑州机械设计研究院有限公司 | A kind of Gateway Station in Heating Network system using thermal power plant condenser steam exhaust |
| CN110761850A (en) * | 2019-11-28 | 2020-02-07 | 华电郑州机械设计研究院有限公司 | Peak shaving reconstruction system based on external heat supply unit with two-stage series bypass |
| CN111425911A (en) * | 2020-04-16 | 2020-07-17 | 大唐环境产业集团股份有限公司 | Thermoelectric decoupling system of heat exchange and heat storage tank and working method |
| CN113606646A (en) * | 2021-07-07 | 2021-11-05 | 华电电力科学研究院有限公司 | Automatic control system and method for drainage recovery of heat supply network |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120713A (en) * | 2017-06-16 | 2017-09-01 | 华电郑州机械设计研究院有限公司 | A kind of anti-overtemperature cooling system of high back pressure thermal power plant unit condensate |
| CN107120713B (en) * | 2017-06-16 | 2022-09-13 | 华电郑州机械设计研究院有限公司 | High back pressure heat supply unit condensate water prevents super temperature cooling system |
| CN109297074A (en) * | 2018-09-17 | 2019-02-01 | 国网湖南省电力有限公司 | The control method and system of the small steam turbine steam discharge heating system of back pressure type steam-driven induced draft fan |
| CN109297074B (en) * | 2018-09-17 | 2020-08-14 | 国网湖南省电力有限公司 | Control method and system for small steam turbine steam exhaust and heat supply system of back pressure type steam-driven induced draft fan |
| CN109520001A (en) * | 2018-12-12 | 2019-03-26 | 沧州华润热电有限公司 | A kind of heat supply network draining system |
| CN109653819A (en) * | 2019-01-24 | 2019-04-19 | 中国电力工程顾问集团东北电力设计院有限公司 | A kind of cogeneration units depth peak regulation steam turbine system and control method |
| CN109653819B (en) * | 2019-01-24 | 2023-10-24 | 中国电力工程顾问集团东北电力设计院有限公司 | Deep peak-shaving steam turbine system of cogeneration unit and control method |
| CN110500637A (en) * | 2019-06-27 | 2019-11-26 | 华电郑州机械设计研究院有限公司 | A kind of Gateway Station in Heating Network system using thermal power plant condenser steam exhaust |
| CN110500637B (en) * | 2019-06-27 | 2024-05-28 | 华电郑州机械设计研究院有限公司 | Heat supply network head station system utilizing exhaust steam of condenser of thermal power plant |
| CN110761850A (en) * | 2019-11-28 | 2020-02-07 | 华电郑州机械设计研究院有限公司 | Peak shaving reconstruction system based on external heat supply unit with two-stage series bypass |
| CN111425911A (en) * | 2020-04-16 | 2020-07-17 | 大唐环境产业集团股份有限公司 | Thermoelectric decoupling system of heat exchange and heat storage tank and working method |
| CN113606646A (en) * | 2021-07-07 | 2021-11-05 | 华电电力科学研究院有限公司 | Automatic control system and method for drainage recovery of heat supply network |
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Application publication date: 20160727 |
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