CN105423398A - Novel series heating network drainage system - Google Patents
Novel series heating network drainage system Download PDFInfo
- Publication number
- CN105423398A CN105423398A CN201511006573.6A CN201511006573A CN105423398A CN 105423398 A CN105423398 A CN 105423398A CN 201511006573 A CN201511006573 A CN 201511006573A CN 105423398 A CN105423398 A CN 105423398A
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- Prior art keywords
- district heating
- heat exchangers
- hydrophobic
- heating network
- pressure heat
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000002209 hydrophobic effect Effects 0.000 claims description 46
- 238000002955 isolation Methods 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010248 power generation Methods 0.000 abstract description 3
- 230000008676 import Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
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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
- F24D2220/0271—Valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention belongs to the technical field of thermal power generation, especially relates to the technical field of combined heat and power generation and particularly relates to a novel series heating network drainage system. The novel series heating network drainage system comprises high-pressure heating network heaters. First electric isolating valves with the stopover function are additionally arranged at drainage openings of the high-pressure heating network heaters. Drainage is converged to a drainage main pipe of the high-pressure heating network heater openings through the high-pressure heating network heaters and enters low-pressure heating network heaters through an adjusting valve set. Second electric isolating valves with the stopover function are additionally arranged at drainage openings of the low-pressure heating network heaters. Drainage is converged to a drainage main pipe of the low-pressure heating network heater openings through the second electric isolating valves and enters heating network drainage pumps. The heating network heaters drainage is drained to deaerators of two units after pressurized drainage passing through a water level adjusting valve set of heating network drainage pump openings and a water volume balance adjusting valve set of the two units. By the adoption of the novel series heating network drainage system, the model selection difficulty, manufacturing difficulty and cost of the high-pressure heating network heaters, and the economic benefits of the units are improved.
Description
Technical field
The invention belongs to thermal power generating technology field, particularly relate to cogeneration of heat and power technical field, be specifically related to a kind of novel series connection heat supply network draining system.
Background technology
Under the overall background of energy-saving and emission-reduction, each thermal power generation corporations are all carrying out the comprehensive upgrading of energy-saving and emission-reduction at present, and idea manages to reduce the operating index such as unit generation coal consumption and station service power consumption rate, improves the economic benefit of unit further.Therefore, in current thermal power plant pure condensate unit heat supply transformation, a lot of power plant have employed the technical scheme that back pressure type small turbine drives circulation pump of heat-supply network, saves station service consumption.In this scenario, high pressure heat exchangers for district heating and low pressure heat exchangers for district heating is provided with in heating system, the vapour source of high pressure heat supply network vapour adopts the upper punching of steam turbine mesolow communicating pipe to draw gas, the steam discharge of the back pressure type small turbine of self-driven circulation pump of heat-supply network is carried out in low pressure heat exchangers for district heating vapour source, high and low pressure heat exchangers for district heating draining system often adopts parallel system, is divided into high pressure heat supply network heater condensate section and low pressure heat exchangers for district heating hydrophobic section.The hydrophobic of high pressure heat exchangers for district heating imports high pressure heat supply network heater-drip pump import mother pipe after respective motor-operated isolation valve, the hydrophobic of low pressure heat exchangers for district heating imports low pressure heat exchangers for district heating import mother pipe after respective motor-operated isolation valve, two sections hydrophobic respectively through converging to the hydrophobic mother's pipe of same outlet after the boosting of respective heat exchangers for district heating drainage pump (speed governing) (being divided into high pressure heat supply network heater-drip pump, low pressure heat exchangers for district heating drainage pump), control valve group, cause the oxygen-eliminating device of two units more respectively, working medium and heat are reclaimed.
Adopt this heat exchangers for district heating draining system, the vapour source of high pressure heat exchangers for district heating is owing to drawing gas from mesolow communicating pipe, parameter is general higher, domestic 300MW, 600MW pure condensate unit mesolow communicating pipe extraction pressure is between 0.6 ~ 1.2MPa, corresponding hydrophobic saturation temperature is about 160 DEG C ~ 180 DEG C, more conventional heat exchangers for district heating exceeds a lot, in order to the heat that maximum using draws gas, need to reduce as much as possible high pressure heat exchangers for district heating lower end poor, add manufacture difficulty and the cost of high pressure heat exchangers for district heating, adopt high simultaneously, low pressure heat exchangers for district heating draining system in parallel, the number of units of drainage pump is increased greatly, add the complexity of system, also increase equipment investment.
Summary of the invention
The technical problem to be solved in the present invention is: the increase of the higher heater manufacture difficulty that causes of drain temperature and cost when using at present high parameter steam to be directly used in the heat exchange of high pressure heat exchangers for district heating, for solving the problem, provide a kind of novel series connection heat supply network draining system.
The object of the invention is to realize in the following manner:
A kind of novel series connection heat supply network draining system, comprise high pressure heat exchangers for district heating, the hydrophobic outlet of high pressure heat exchangers for district heating install additional with in stop the motor-operated isolation valve I of function, hydrophobic through motor-operated isolation valve I converge to high pressure heat exchangers for district heating outlet hydrophobic mother pipe, through control valve group, enter low pressure heat exchangers for district heating respectively, the hydrophobic outlet of low pressure heat exchangers for district heating install additional with in stop the motor-operated isolation valve II of function, hydrophobic through motor-operated isolation valve II converge to low pressure heat exchangers for district heating outlet hydrophobic mother pipe, enter heat supply network drainage pump respectively again, through the level control valve door group of heat supply network drainage pump outlet and two unit hydrophobic water balance control valve groups after boosting, realize the hydrophobic oxygen-eliminating device dredged respectively to two units of heat exchangers for district heating.
High pressure heat exchangers for district heating is at least one, and the hydrophobic outlet of high pressure heat exchangers for district heating is provided with motor-operated isolation valve I.
Low pressure heat exchangers for district heating is at least two, and the hydrophobic outlet of each low pressure heat exchangers for district heating is provided with motor-operated isolation valve II.
The female pipe of hydrophobic outlet of high pressure heat exchangers for district heating adds the control valve group regulating high pressure heat supply network heater water level.
Heat supply network drainage pump is at least two and is arranged in parallel.
The arm of a wherein oxygen-eliminating device is equipped with hydrophobic water balance control valve group.
Compared with prior art, beneficial effect of the present invention is as follows:
1, the present invention by adopting novel series connection heat supply network draining system in heat supply transformation, reduces the requirement of high pressure heat exchangers for district heating to drain approach, reduces the type selecting difficulty of high pressure heat exchangers for district heating, manufacture difficulty and cost, improves the economic benefit of unit.
2, the present invention is by adopting novel series connection heat supply network draining system, eliminates high pressure heat supply network heater-drip pump, improves the configuration of drainage pump, greatly reduce construction investment.
3, this invention simplifies draining system, reduce the requirement that operation is controlled, improve the security that draining system runs.
Accompanying drawing explanation
Fig. 1 is theory structure schematic diagram of the present invention.
Fig. 2 is the heat supply network draining system in parallel before improving.
Wherein, 1 is high pressure heat exchangers for district heating; 2 is low pressure heat exchangers for district heatings; 3 is heat supply network drainage pumps; 4 is control valve groups; 5 is level control valve door groups; 6 is water balance control valve groups; 7 is motor-operated isolation valve I; 8 is motor-operated isolation valve II.
Detailed description of the invention
As shown in Figure 1, the present invention is a kind of novel series connection heat supply network draining system, that the one of heat supply network draining system in parallel is improved, comprise high pressure heat exchangers for district heating 1, low pressure heat exchangers for district heating 2, heat supply network drainage pump 3, hydrophobic level control valve door group 5, two the unit hydrophobic water balance control valve groups 6 exported to low pressure heat exchangers for district heating control valve group 4, heat supply network drainage pump 3 of high pressure heat exchangers for district heating 1, pipeline and other related valve, annex etc.
The hydrophobic outlet of described high pressure heat exchangers for district heating 1 install additional with in stop the motor-operated isolation valve I7 of function, remittance to high pressure heat exchangers for district heating 1 exports hydrophobic mother's pipe, through control valve group 4, enter low pressure heat exchangers for district heating 2 respectively, the hydrophobic outlet of low pressure heat exchangers for district heating 2 install additional with in stop the motor-operated isolation valve II8 of function, remittance to low pressure heat exchangers for district heating 2 exports hydrophobic mother's pipe, enter heat supply network drainage pump 3 respectively again, through the level control valve door group 5 of heat supply network drainage pump 3 outlet and two unit hydrophobic water balance control valve groups 6 after boosting, realize the hydrophobic oxygen-eliminating device dredged respectively to two units of heat exchangers for district heating, working medium and heat are reclaimed, improve the economic benefit of unit.
Wherein, the number of high pressure heat exchangers for district heating 1 carries out design selection according to the number of heating demand, can arrange one or more;
2 numbers of low pressure heat exchangers for district heating are at least two, prevent when low pressure heat exchangers for district heating 2 fault, the little steam turbine steam discharge of pumps for hot water supply net back pressure type does not have place to go, pumps for hot water supply net is caused to stop transport, affect unit heat supply, two or more low pressure heat exchangers for district heating 2 can be set according to the displacement size of the little steam turbine of pumps for hot water supply net back pressure type;
With in stop the motor-operated isolation valve I7 of function, can realize finely tuning separately the water level of each high pressure heat exchangers for district heating 1;
With in stop the motor-operated isolation valve II8 of function, can realize finely tuning separately the water level of each low pressure heat exchangers for district heating 2;
Heat supply network drainage pump 3, can carry out Selection and Design according to the size of the hydrophobic amount of heat exchangers for district heating, at least arrange two or multiple stage;
Heat supply network drainage pump 3 exports female pipe and is provided with level control valve door group 5;
The hydrophobic arm entering a wherein unit oxygen-eliminating device in two units of described heat supply network is equipped with hydrophobic water balance control valve group 6, #1 unit or #2 unit can be contained in.
Can find out, the present invention (as Fig. 1) and conventional art (as Fig. 2) difference be high pressure heat exchangers for district heating 1 hydrophobic no longer boost separately through high pressure heat supply network drainage pump 1 after with the oxygen-eliminating device dredged again to two units in parallel after low pressure heat exchangers for district heating 2 hydrophobic is boosted separately through low pressure heat exchangers for district heating drainage pump, but high pressure heat exchangers for district heating 1 is hydrophobic step by step from flowing to low pressure heat exchangers for district heating 2, the hydrophobic of high and low pressure heat exchangers for district heating no longer adopts parallel way, but adopts series system.The hydrophobic mode of this novel series connection heat supply network, eliminates high pressure heat supply network heater-drip pump, improves the configuration of drainage pump, greatly reduce construction investment; Meanwhile, also reduce the requirement of high pressure heat exchangers for district heating 1 pair of drain approach, reduce the type selecting difficulty of high pressure heat exchangers for district heating 1, manufacture difficulty and cost, simplify draining system, reduce the requirement that operation is controlled, improve the security that draining system runs.
Claims (6)
1. a novel series connection heat supply network draining system, it is characterized in that: comprise high pressure heat exchangers for district heating, the hydrophobic outlet of high pressure heat exchangers for district heating install additional with in stop the motor-operated isolation valve I of function, hydrophobic through motor-operated isolation valve I converge to high pressure heat exchangers for district heating outlet hydrophobic mother pipe, through control valve group, enter low pressure heat exchangers for district heating respectively, the hydrophobic outlet of low pressure heat exchangers for district heating install additional with in stop the motor-operated isolation valve II of function, hydrophobic through motor-operated isolation valve II converge to low pressure heat exchangers for district heating outlet hydrophobic mother pipe, enter heat supply network drainage pump respectively again, through the level control valve door group of heat supply network drainage pump outlet and two unit hydrophobic water balance control valve groups after boosting, realize the hydrophobic oxygen-eliminating device dredged respectively to two units of heat exchangers for district heating.
2. one according to claim 1 novel series connection heat supply network draining system, is characterized in that: high pressure heat exchangers for district heating is at least one, and the hydrophobic outlet of high pressure heat exchangers for district heating is provided with motor-operated isolation valve I.
3. one according to claim 1 novel series connection heat supply network draining system, is characterized in that: low pressure heat exchangers for district heating is at least two, and the hydrophobic outlet of each low pressure heat exchangers for district heating is provided with motor-operated isolation valve II.
4. one according to claim 1 novel series connection heat supply network draining system, is characterized in that: the female pipe of hydrophobic outlet of high pressure heat exchangers for district heating adds the control valve group regulating high pressure heat supply network heater water level.
5. one according to claim 1 novel series connection heat supply network draining system, is characterized in that: heat supply network drainage pump is at least two and is arranged in parallel.
6. one according to claim 1 novel series connection heat supply network draining system, is characterized in that: the arm of a wherein oxygen-eliminating device is equipped with hydrophobic water balance control valve group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511006573.6A CN105423398B (en) | 2015-12-29 | 2015-12-29 | One kind series connection heat supply network draining system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511006573.6A CN105423398B (en) | 2015-12-29 | 2015-12-29 | One kind series connection heat supply network draining system |
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| Publication Number | Publication Date |
|---|---|
| CN105423398A true CN105423398A (en) | 2016-03-23 |
| CN105423398B CN105423398B (en) | 2018-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201511006573.6A Active CN105423398B (en) | 2015-12-29 | 2015-12-29 | One kind series connection heat supply network draining system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105737231A (en) * | 2016-04-29 | 2016-07-06 | 华电郑州机械设计研究院有限公司 | Novel heat supply network water replenishing system |
| CN105805809A (en) * | 2016-04-29 | 2016-07-27 | 华电郑州机械设计研究院有限公司 | Novel heating network heater parallel-connection heat supply system |
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| CN102022144A (en) * | 2010-11-12 | 2011-04-20 | 华北电力大学（保定） | Thermal power generation system with function of exhaust steam recovery |
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| CN204730303U (en) * | 2015-06-09 | 2015-10-28 | 西安交通大学 | The heating system of the 12MW small cogeneration unit under a kind of underrun operating mode |
| CN205481240U (en) * | 2015-12-29 | 2016-08-17 | 华电郑州机械设计研究院有限公司 | Novel series connection heat supply network drainage system |
-
2015
- 2015-12-29 CN CN201511006573.6A patent/CN105423398B/en active Active
Patent Citations (7)
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|---|---|---|---|---|
| EP2520855A1 (en) * | 2009-12-30 | 2012-11-07 | China Power Engineering Consulting Group Corporation East China Electric Power Institute | Feed water and drainage system for medium pressure heater in power plant |
| CN102022144A (en) * | 2010-11-12 | 2011-04-20 | 华北电力大学（保定） | Thermal power generation system with function of exhaust steam recovery |
| CN202403258U (en) * | 2011-11-22 | 2012-08-29 | 邹治平 | Water-supply steam-extraction regenerative heating system of coal-fired power plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105737231A (en) * | 2016-04-29 | 2016-07-06 | 华电郑州机械设计研究院有限公司 | Novel heat supply network water replenishing system |
| CN105805809A (en) * | 2016-04-29 | 2016-07-27 | 华电郑州机械设计研究院有限公司 | Novel heating network heater parallel-connection heat supply system |
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| Publication number | Publication date |
|---|---|
| CN105423398B (en) | 2018-04-06 |
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