CN105910454A - Direct high back pressure heat supply system of indirect air cooling unit - Google Patents
Direct high back pressure heat supply system of indirect air cooling unit Download PDFInfo
- Publication number
- CN105910454A CN105910454A CN201610324929.9A CN201610324929A CN105910454A CN 105910454 A CN105910454 A CN 105910454A CN 201610324929 A CN201610324929 A CN 201610324929A CN 105910454 A CN105910454 A CN 105910454A
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- Prior art keywords
- heat supply
- water
- valve
- back pressure
- supply network
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention relates to the technical field of unit heat supply, in particular to a direct high back pressure heat supply system of an indirect air cooling unit. The direct high back pressure heat supply system comprises a condenser and is characterized in that recycled water pipelines in the condenser are uniformly divided into two separate parts: on one side, a water inlet pipe communicates with a heat supply network water return pipe, and a water outlet pipe communicates with a heat supply network water heater by virtue of a heat supply network circulating pump; on the other side, the water inlet pipe communicates with an indirect cooling tower through a frequency conversion circulating water pump, and the water outlet pipe communicates with the water inlet pipe of the indirect cooling tower. The direct high back pressure heat supply system is small in investment and simple in structure, takes effect quickly, and can realize operation under pure condensing and back pressure modes; in addition, in case that the heat supply network is abnormal, the unit can switch over two operational modes without halt to ensure operating safety of the unit.
Description
(1) technical field
The present invention relates to unit heat supply process field, particularly to a kind of indirect air cooling unit direct high back pressure heating system.
(2) background technology
Low pressure (LP) cylinder high back pressure circulating water heating reducing energy consumption engineering, it is possible to effectively reduce gross coal consumption rate and reduce carbon dioxide, two
The waste gas discharges such as sulfur oxide, improve reliability of heat-supply system and heat capacity, and economy, environmental protection and social benefit are notable, for further
Ensure to open new way for the thermally safe sick energy-saving potential excavating thermal power plant unit, to reducing energy consumption, improving enterprise getting profit level
Significant, also comply with country simultaneously and propose sustainable development and the requirement of energy-saving and emission-reduction in 12 planning.
Conventional high back pressure heating system, on the one hand unit is run by the mode of electricity determining by heat, and electric load affected by hot loading limits
System, on the other hand when abnormal dehydration occurs in heat supply network, unit condenser circulating water flow reduces rapidly, it is impossible to effectively take away low pressure
Cylinder exhaust steam heat, high back pressure thermal power plant unit must be shut down, be brought massive losses to enterprise.Additionally, conventional high back pressure heating system
It is applied to indirect air cooling unit, it is impossible to the problems such as between solution, cool island is antifreeze, electrical network islet operation, heat supply network are aging, can direct image
The economy of unit operation and safety.
(3) summary of the invention
The present invention is in order to make up the deficiencies in the prior art, it is provided that a kind of run safety, heat supply network abnormal do not shut down, energy-saving and emission-reduction
Indirect air cooling unit direct high back pressure heating system.
The present invention is achieved through the following technical solutions:
A kind of indirect air cooling unit direct high back pressure heating system, including condenser, it is characterised in that: follow inside described condenser
Ring waterpipe is uniformly divided into independent two parts, wherein the water inlet pipe connection heat supply network return pipe of side, and outlet pipe is followed by heat supply network
Ring pump connection heat exchangers for district heating；The water inlet pipe of opposite side connects indirect cool tower, outlet pipe connection indirect cool tower by frequency conversion water circulating pump
Water inlet pipe.
In order to ensure high back pressure thermal power plant unit safe operation, it is achieved heat supply network is abnormal does not shuts down, for indirect air cooling formula heat supply
The feature of unit, and make full use of the advantage of indirect air cooling unit self, design is applicable to the high back pressure of indirect air cooling unit and supplies
Hot systems.Two-way independence water source, each half side operation, two warm area heat exchange are designed, it may be assumed that condenser is half side logical for condenser recirculated water
Enter heat supply network recirculated water, it is achieved externally heat supply, the most half side be passed through indirect cool tower cooling circulating water, as reserved cooling system.
The more excellent technical scheme of the present invention is:
It is separately installed with valve A, valve E on the both sides water inlet pipe of described condenser, outlet pipe is separately installed with valve B, valve
Door F, it is achieved the on-off control of condenser both sides water inlet pipe and water outlet pipe.
The both sides water inlet pipe of described condenser and outlet pipe are all connected by pipeline, and are respectively mounted on two pipelines connected
There is valve C and valve D, it is simple to indirect cool tower and the water supply of heat supply network water pipe, backwater switching.
The bypass of heat supply network recirculated water, and heat supply network it is communicated with between described heat supply network return pipe and the outlet pipe installing pumps for hot water supply net
In recirculated water bypass, valve G is installed, it is simple to realize the excision of heat supply network recirculated water.
On described heat supply network return pipe, valve H is installed, the water inlet pipe of indirect cool tower is provided with valve I, it is simple to control pipeline
The flow in upper water route.
In heating system, back pressure of condenser improves, and low pressure (LP) cylinder exhaust temperature improves, and heat supply network backwater passes through Valve controlling, first
The wing passage entering condenser heats, and the heat exchangers for district heating subsequently into heat supply initial station carries out post bake, reaches heat
The temperature that net needs, meets heating demand；In reserved cooling system, utilize former indirect cool tower recirculating cooling water system, by indirect cool tower
Recirculated cooling water be passed through the opposite side passage of condenser, and use variable frequency pump to regulate circulating cooling water flow, it is ensured that regulation
Scope is adapted to different electric load operating mode.
The present invention can effectively solve the problem that the problem that conventional high back pressure thermal power plant unit electric load affected by hot loading limits, it is achieved cold
The Based Intelligent Control of tower recirculated water and scheduling, it is ensured that unit safety operation, overcome that heating enterprise heat supply network is aging, electrical network islet operation,
Indirect cool tower is antifreeze waits series of problems, it is achieved unit, in pure condensate, the online switching taken out between solidifying, back pressure heat supply, is effectively improved
Enterprise heat capacity, it is achieved save coal-fired, reduce many-sided benefits such as pollution, more efficiently guarantee that high back pressure circulates simultaneously
The safety of water thermal power plant unit, economy, stable operation.
Small investment of the present invention, instant effect, simple in construction, it is possible to achieve pure condensate and back pressure are dual mode operated, and at heat supply network
When occurring abnormal, unit can realize not shutting down two kinds of operational modes of switching, it is ensured that unit operation safety, after transformation, unit is for heat energy
Power and hotspot stress increase, and have reclaimed cold source energy, and economic benefit increases.
(4) accompanying drawing explanation
The present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention.
In figure, 1 condenser, 2 heat supply network return pipes, 3 pumps for hot water supply net, 4 heat exchangers for district heatings, 5 frequency conversion water circulating pumps, cold between 6
Tower, 7 valve A, 8 valve B, 9 valve C, 10 valve D, 11 valve E, 12 valve F, 13 valve G, 14 valve H, 15 valve I, 16 heat
Net recirculated water bypasses.
(5) detailed description of the invention
Accompanying drawing is a kind of specific embodiment of the present invention.This embodiment includes condenser 1, described condenser 1 inner loop water pipe
Road is uniformly divided into independent two parts, wherein the water inlet pipe connection heat supply network return pipe 2 of side, and outlet pipe passes through pumps for hot water supply net 3
Connection heat exchangers for district heating 4；The water inlet pipe of opposite side connects indirect cool tower 6, outlet pipe connection indirect cool tower 6 by frequency conversion water circulating pump 5
Water inlet pipe；It is separately installed with valve A7, valve E11 on the both sides water inlet pipe of described condenser 1, outlet pipe is separately installed with
Valve B8, valve F12；Both sides water inlet pipe and the outlet pipe of described condenser 1 are all connected by pipeline, and on two pipelines connected
It is separately installed with valve C9 and valve D10；It is communicated with between described heat supply network return pipe 2 and the outlet pipe installing pumps for hot water supply net 3
In heat supply network recirculated water bypass 16, and heat supply network recirculated water bypass 16, valve G13 is installed；On described heat supply network return pipe 2, valve is installed
Door H14, the water inlet pipe of indirect cool tower 6 is provided with valve I15.
When unit runs in high back pressure circulating water heating operating mode, the valve G13 in heat supply network recirculated water bypass 16 is in pass
Closed state, valve C9 and valve D10 are closed, and remaining valve is in opening, frequency conversion water circulating pump 5 low discharge
Run；Heat supply network backwater subordinate enters condenser 1 and carries out one-level heating, then after pumps for hot water supply net 3 boosts, enters initial station heat supply network
Heater 4 carries out post bake, reaches the temperature that heat supply network needs；When heat supply network occurs abnormal, heat supply network quantity of circulating water is caused to subtract rapidly
Time few, regulate frequency conversion water circulating pump 5, increase indirect cool tower 6 circulating cooling water flow, it is ensured that unit is not shut down.
Applying this system, when unit is properly functioning, indirect cool tower 6 circulating cooling water flow reduces as far as possible, between only need to ensureing
Cold tower 6 cooling water pipe not frost bitten；When heat supply network circulating water flow is inadequate or during abnormal dehydration, by controlling pipeline valve, and adjusts
The power of the frequency conversion water circulating pump 5 of joint indirect cool tower 6, increases indirect cool tower 6 circulating cooling water flow, maintains unit exhaust pressure, sends out
Electrical power is stable, it is ensured that unit safety operation.
Claims (5)
1. an indirect air cooling unit direct high back pressure heating system, including condenser (1), it is characterised in that: described condenser
(1) inner loop waterpipe is uniformly divided into independent two parts, wherein water inlet pipe connection heat supply network return pipe (2) of side, water outlet
Pipe is by pumps for hot water supply net (3) connection heat exchangers for district heating (4)；Between the water inlet pipe of opposite side is by frequency conversion water circulating pump (5) connection
Cold tower (6), the water inlet pipe of outlet pipe connection indirect cool tower (6).
Indirect air cooling unit the most according to claim 1 direct high back pressure heating system, it is characterised in that: described condenser
(1) be separately installed with valve A(7 on both sides water inlet pipe), valve E(11), outlet pipe is separately installed with valve B(8), valve
F(12).
Indirect air cooling unit the most according to claim 1 direct high back pressure heating system, it is characterised in that: described condenser
(1) both sides water inlet pipe and outlet pipe are all connected by pipeline, and are separately installed with valve C(9 on two pipelines connected) and valve
Door D(10).
Indirect air cooling unit the most according to claim 1 direct high back pressure heating system, it is characterised in that: described heat supply network returns
Heat supply network recirculated water bypass (16), and heat supply network circulating-water bypass it is communicated with between water pipe (2) and the outlet pipe installing pumps for hot water supply net (3)
Road is provided with valve G(13 on (16)).
Indirect air cooling unit the most according to claim 1 direct high back pressure heating system, it is characterised in that: described heat supply network returns
Water pipe is provided with valve H(14 on (2)), the water inlet pipe of indirect cool tower (6) is provided with valve I(15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610324929.9A CN105910454A (en) | 2016-05-17 | 2016-05-17 | Direct high back pressure heat supply system of indirect air cooling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610324929.9A CN105910454A (en) | 2016-05-17 | 2016-05-17 | Direct high back pressure heat supply system of indirect air cooling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105910454A true CN105910454A (en) | 2016-08-31 |
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ID=56749268
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610324929.9A Pending CN105910454A (en) | 2016-05-17 | 2016-05-17 | Direct high back pressure heat supply system of indirect air cooling unit |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106468190A (en) * | 2016-11-18 | 2017-03-01 | 新疆华电喀什热电有限责任公司 | Indirect air cooling High Back Pressure Steam Turbine Units peak load regulation network ability and the coordinated control system of heat demand |
| CN107120981A (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 on-line monitoring, the high back pressure supplying thermal condition exception control system of closed loop regulation |
| CN108224534A (en) * | 2018-03-01 | 2018-06-29 | 申能吴忠热电有限责任公司 | A kind of indirect air cooling steam turbine high back pressure heating system |
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| JP2013087709A (en) * | 2011-10-19 | 2013-05-13 | Hitachi Ltd | Condenser cooling water system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106468190A (en) * | 2016-11-18 | 2017-03-01 | 新疆华电喀什热电有限责任公司 | Indirect air cooling High Back Pressure Steam Turbine Units peak load regulation network ability and the coordinated control system of heat demand |
| CN106468190B (en) * | 2016-11-18 | 2018-09-25 | 新疆华电喀什热电有限责任公司 | The coordinated control system of indirect air cooling High Back Pressure Steam Turbine Units peak load regulation network ability and heat demand |
| CN107120981A (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 on-line monitoring, the high back pressure supplying thermal condition exception control system of closed loop regulation |
| CN107120981B (en) * | 2017-06-16 | 2023-04-25 | 华电郑州机械设计研究院有限公司 | High back pressure heat supply working condition abnormal control system with on-line monitoring and closed loop adjustment |
| CN108224534A (en) * | 2018-03-01 | 2018-06-29 | 申能吴忠热电有限责任公司 | A kind of indirect air cooling steam turbine high back pressure heating system |
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| PB01 | Publication | ||
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Application publication date: 20160831 |