CN208458053U - A kind of thermal power plant unit operating system improving safety - Google Patents
A kind of thermal power plant unit operating system improving safety Download PDFInfo
- Publication number
- CN208458053U CN208458053U CN201821129568.3U CN201821129568U CN208458053U CN 208458053 U CN208458053 U CN 208458053U CN 201821129568 U CN201821129568 U CN 201821129568U CN 208458053 U CN208458053 U CN 208458053U
- Authority
- CN
- China
- Prior art keywords
- heat
- valve
- outlet
- steam
- district heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The utility model relates to a kind of thermal power plant unit operating systems for improving safety, technical solution is, the first extraction line and the second extraction line being connected respectively with the steam inlet on heat-accumulator tank top are sequentially arranged on reheat vapor cycle pipeline between boiler and intermediate pressure cylinder air intake, equipped with the third extraction line being connected with heat exchangers for district heating steam inlet on cross over pipe, third extraction line between third steam extraction valve and heat exchangers for district heating steam inlet is equipped with the 4th extraction line being connected with the steam inlet on heat-accumulator tank top, the utility model structure novel is unique, advantages of simple, it is easy to produce, it is easy to operate, it is at low cost, the exhaust steam heat that power plant loses by hostdown removal of load can effectively be recycled；The heat user hot time can effectively be extended in the state of accident, exhaust temperature height thermal stress deformation caused by condenser and the impact to other subsidiary engine equipment, easy to use when can reduce removal of load, and effect is good, is the innovation on thermal power plant unit securely and reliably.
Description
Technical field
The utility model relates to power plant's operational safety field, especially a kind of thermal power plant unit for improving safety runs system
System, is particularly suitable for three northern areas of China thermal power plant unit.
Background technique
For current China's fired power generating unit installation total amount up to 1,100,000,000 kilowatts, wherein thermoelectricity unit accounts for about 50%, and is concentrated mainly on
Three northern areas of China, by taking the Northeast as an example, thermoelectric perpetual motion machine kludge capacity accounting is up to 70%.In Heating Season, thermal power plant unit adjusts fortune
Row is limited by two factors of power grid depth peak regulation and outer net thermic load.In order to realize power plant's profit maximization, many heat supply machines
Group has carried out related heat supply and has been transformed, such as after high steam (such as main steam, cold steam again, hot steam again) pressure and temperature reducing directly
Heat supply etc. is transformed in heat supply, the solidifying back of taking out of unit.The requirement of unit depth peak regulation can be met to a certain extent by these transformations.
, to guarantee unit safety, routine is mostly used when unit parameter fluctuates larger or failure for thermal power plant unit
Steam is discharged into condenser by unit bypath system or reenters boiler system by removal of load method, this mode pair
Unit exerts a certain influence for thermally safe, and wastes some vapor, results in waste of resources.
Chinese patent 201720592406.2 proposes a kind of accumulation of heat can system, according to its claim, uses melting
Salt phase change technique, using power plant steam accumulation of heat, for reducing power generating capacity.The system needs newly-increased electric heater unit, whole
Cost is higher.Chinese patent 201621247478.5 proposes a kind of heat-accumulator tank and heat supply network is directly connected to system, according to its right
It is required that can be realized being directly connected to for heat supply network and hold over system, but it is not able to achieve the heat of recycling machine group removal of load loss, and nothing
Method guarantees unit operational safety, and cannot achieve unit " coupled thermomechanics ".
Therefore, it is imperative to improve and innovate.
Utility model content
For above situation, for the defect for overcoming the prior art, the purpose of the utility model is just to provide a kind of raising peace
The thermal power plant unit operating system of full property can effectively improve the safety in operation of thermal power plant unit, and recyclable load rejection mistake
Steam heat in journey can effectively extend unit heating time.
The technical solution that the utility model solves is a kind of thermal power plant unit operating system for improving safety, including boiler,
High pressure cylinder, intermediate pressure cylinder and low pressure (LP) cylinder, the steam (vapor) outlet of boiler are connected with the air intake of high pressure cylinder, are equipped on the venthole of high pressure cylinder
It protrudes into and is connected with the reheat vapor cycle pipeline in boiler, the steam output end of reheat vapor cycle pipeline with the air intake of intermediate pressure cylinder, intermediate pressure cylinder
Venthole is connected through cross over pipe with the air intake of low pressure (LP) cylinder, constitutes the multistage steam acting power output with circulation reheat function
Structure；The steam inlet with heat-accumulator tank top respectively is sequentially arranged on reheat vapor cycle pipeline between boiler and intermediate pressure cylinder air intake
Connected the first extraction line and the second extraction line is equipped with the first steam extraction valve, the second extraction line on the first extraction line
It is upper that second steam extraction valve is housed, the third extraction line being connected with heat exchangers for district heating steam inlet is housed, third is taken out on cross over pipe
Third steam extraction valve is housed, the third extraction line dress between third steam extraction valve and heat exchangers for district heating steam inlet on steam pipe road
There is the 4th extraction line being connected with the steam inlet on heat-accumulator tank top, the 4th steam extraction valve, heat are housed on the 4th extraction line
The water outlet of net return water is connected with the import of pumps for hot water supply net by the road, pumps for hot water supply net outlet respectively by the road with heat supply return water
The import of total valve is connected with the import of hold over system bypass valve, and the outlet of heat supply return water total valve is by the road and under heat-accumulator tank
The water inlet in portion is connected, and the water outlet of heat-accumulator tank lower part is connected with the import of heat-accumulator tank outlet valve by the road, heat-accumulator tank outlet
Valve is by the road respectively and by the outlet of hold over system bypass valve, the import of heat exchangers for district heating imported valve and heat exchangers for district heating
The import of road valve is connected, and the outlet of heat exchangers for district heating imported valve is connected with the healed water entrance of heat exchangers for district heating, heat supply network
The healed water outlet of heater is connected with the import of heat exchangers for district heating outlet valve, the outlet point of heat exchangers for district heating outlet valve
It is not connected with the outlet of heat exchangers for district heating bypass valve and the import of heat supply water supply total valve, the outlet of heat supply water supply total valve is made
Condensate outlet for the water outlet that heat supply network supplies water, heat exchangers for district heating is connected with the import of heat supply network drainage pump, and heat supply network drainage pump goes out
The mouth water outlet hydrophobic as heat supply network.
The utility model structure novel is unique, and advantages of simple is easy to produce, easy to operate, at low cost, can effectively recycle power plant
Because of the exhaust steam heat of hostdown removal of load loss；The heat user hot time can effectively be extended in the state of accident, can reduce and get rid of
Exhaust temperature height thermal stress deformation caused by condenser and the impact to other subsidiary engine equipment, easy to use, effect when load
It is good, it is the innovation on thermal power plant unit securely and reliably, there is good social and economic benefit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
Specific embodiment of the present utility model is described in further detail below in conjunction with attached drawing.
It is provided by Fig. 1, the utility model includes boiler 1, high pressure cylinder 2, intermediate pressure cylinder 3 and low pressure (LP) cylinder 4, and the steam of boiler 1 goes out
Mouthful be connected with the air intake of high pressure cylinder 2 by High Pressure Steam Host Piping 24, be equipped on the venthole of high pressure cylinder protrude into in boiler
Reheat vapor cycle pipeline 22, the steam output end of reheat vapor cycle pipeline is connected with the air intake of intermediate pressure cylinder 3, and the venthole of intermediate pressure cylinder is through joining
Siphunculus 23 is connected with the air intake of low pressure (LP) cylinder 4, constitutes the multistage steam acting power output structure with circulation reheat function；Pot
The steam inlet phase respectively with 6 top of heat-accumulator tank is sequentially arranged on reheat vapor cycle pipeline 22 between furnace 1 and 3 air intake of intermediate pressure cylinder
The first extraction line 25 and the second extraction line 26 even is equipped with the first steam extraction valve 9, the second steam extraction on the first extraction line 25
Second steam extraction valve 10 is housed on pipeline 26, the third steam extraction being connected with 5 steam inlet of heat exchangers for district heating is housed on cross over pipe 23
Pipeline 27 is equipped with third steam extraction valve 11, third steam extraction valve 11 and 5 steam inlet of heat exchangers for district heating on third extraction line 27
Between third extraction line the 4th extraction line 28 that is connected with the steam inlet on 6 top of heat-accumulator tank, the 4th extraction steam pipe are housed
4th steam extraction valve 12 is housed, the water outlet of heat supply network return water is connected with the import of pumps for hot water supply net 13 by the road, heat supply network on road 28
The outlet of circulating pump 13 is connected with the import of heat supply return water total valve 14 and the import of hold over system bypass valve 16 by the road respectively,
The outlet of heat supply return water total valve 14 is connected with the water inlet of 6 lower part of heat-accumulator tank by the road, and the water outlet of 6 lower part of heat-accumulator tank is through pipe
Road is connected with the import of heat-accumulator tank outlet valve 15, heat-accumulator tank outlet valve 15 by the road respectively with hold over system bypass valve 16
Outlet, heat exchangers for district heating imported valve 17 import be connected with the import of heat exchangers for district heating bypass valve 18, heat exchangers for district heating
The outlet of imported valve 17 is connected with the healed water entrance of heat exchangers for district heating 5, healed water outlet and the heat of heat exchangers for district heating 5
The import of net heater outlet valve 19 is connected, the outlet of heat exchangers for district heating outlet valve 19 respectively with heat exchangers for district heating bypass valve
The outlet of door 18 is connected with the import of heat supply water supply total valve 20, and the outlet of heat supply water supply total valve 20 goes out as what heat supply network supplied water
The condensate outlet at the mouth of a river, heat exchangers for district heating 5 is connected with the import of heat supply network drainage pump 21, and the outlet of heat supply network drainage pump 21 is as heat supply network
Hydrophobic water outlet.
The first steam extraction to guarantee using effect, between the first steam extraction valve 9 and the steam inlet on 6 top of heat-accumulator tank
The first temperature-decreased pressure reducer 7 is provided on pipeline；Between the second steam extraction valve 10 and the steam inlet on 6 top of heat-accumulator tank
The second temperature-decreased pressure reducer 8 is provided on two extraction lines, the desuperheating water of two temperature-decreased pressure reducers is taken from power plant's demineralized water.
The heat-accumulator tank is constant pressure storing heating tank, and accumulation of heat working medium is water, and steam enters from the steam inlet on heat-accumulator tank top
It exchanges heat with water.Heat-accumulator tank lower part is respectively arranged with inlet and outlet, can be passed through heat supply return water and the steam next from top
Heat exchange achievees the purpose that heating, and the water after heating is sent out from water outlet.
The pumps for hot water supply net 13 and heat supply network drainage pump 21 are water pump；First extraction line 25, the second steam extraction
Valve 10, third steam extraction valve 11, the 4th steam extraction valve 12, heat supply return water total valve 14, hold over system bypass valve 16, accumulation of heat
Tank outlet valve 15, heat exchangers for district heating imported valve 17, heat exchangers for district heating bypass valve 18, heat exchangers for district heating outlet valve 19,
Heat supply water supply total valve 20 is flow control valve, which has switch, truncation, flow regulating function.
First extraction line, the second extraction line and third extraction line are respectively as three tunnel vapour sources, respectively quoted from level-one
Bypass, second level bypass (steam extraction of reheat vapor cycle pipeline) and cross over pipe steam extraction.
The service condition of the utility model is: when unit operates normally, heat-accumulator tank 6 is in stand-by state, closes valve and supplies
Hot return water total valve 14, heat-accumulator tank outlet valve 15, heat supply network return water by pumps for hot water supply net 13, hold over system bypass valve 16 into
Enter heat exchangers for district heating, open heat exchangers for district heating imported valve 17, heat exchangers for district heating outlet valve 19, heat supply water supply total valve 20,
Heat exchangers for district heating bypass valve 18 is closed, hot net water supplies outward.Heat exchangers for district heating vapour source is hydrophobic logical from cross over pipe steam extraction
Heat supply network drainage pump 21 is crossed to discharge.When unit is under accident condition, when needing removal of load, when need to open one or second level bypass
(steam extraction of reheat vapor cycle pipeline) closes third steam extraction valve 11, the first steam extraction of Open valve group valve 9 or the second steam extraction valve
10, put into the first temperature-decreased pressure reducer 7 or the second temperature-decreased pressure reducer 8 according to the actual situation, at this time open heat supply return water total valve 14,
Heat-accumulator tank outlet valve 15, closes hold over system bypass valve 16, and heat supply network return water enters heat-accumulator tank by pumps for hot water supply net 13, opens
Heat exchangers for district heating bypass valve 18, heat supply water supply total valve 20 are opened, closes heat exchangers for district heating imported valve 17, heat exchangers for district heating goes out
Mouth valve 19, hot net water are supplied outward by heat exchangers for district heating bypass valve 18, and compared with prior art, the utility model has
Following advantages:
1) exhaust steam heat that power plant loses by hostdown removal of load can effectively be recycled；
2) the heat user hot time can effectively be extended in the state of accident；
3) exhaust temperature height thermal stress deformation caused by condenser and to other subsidiary engine equipment when can reduce removal of load
Impact.
In addition, it should be noted that, the specific embodiments described in this specification, the shape of parts and components are named
Title etc. can be different.All equivalent or simple changes done according to structure, feature and principle described in the concept of the patent of the utility model,
It is included in the protection scope of the utility model patent.Those skilled in the art of the present invention can be to being retouched
The specific embodiment stated does various modifications or additions or is substituted in a similar manner, without departing from the utility model
Structure or beyond the scope defined by this claim, all should belong to the protection range of the utility model.
Claims (4)
1. a kind of thermal power plant unit operating system for improving safety, including boiler (1), high pressure cylinder (2), intermediate pressure cylinder (3) and low pressure
Cylinder (4), which is characterized in that the steam (vapor) outlet of boiler (1) is connected with the air intake of high pressure cylinder (2), fills on the venthole of high pressure cylinder
There is the reheat vapor cycle pipeline (22) protruded into in boiler, the steam output end of reheat vapor cycle pipeline is connected with the air intake of intermediate pressure cylinder (3),
The venthole of intermediate pressure cylinder is connected through cross over pipe (23) with the air intake of low pressure (LP) cylinder (4), constitutes the multistage with circulation reheat function
Steam acting power output structure；It is sequentially arranged on reheat vapor cycle pipeline (22) between boiler (1) and intermediate pressure cylinder (3) air intake
The first extraction line (25) and the second extraction line (26) being connected respectively with the steam inlet on heat-accumulator tank (6) top, first takes out
First steam extraction valve (9) is housed on steam pipe road (25), the second steam extraction valve (10), cross over pipe are housed on the second extraction line (26)
(23) equipped with the third extraction line (27) being connected with heat exchangers for district heating (5) steam inlet on, third extraction line fills on (27)
There are third steam extraction valve (11), the third extraction line between third steam extraction valve (11) and heat exchangers for district heating (5) steam inlet
Equipped with the 4th extraction line (28) being connected with the steam inlet on heat-accumulator tank (6) top, equipped with the on the 4th extraction line (28)
Four steam extraction valves (12), the water outlet of heat supply network return water are connected with the import of pumps for hot water supply net (13) by the road, pumps for hot water supply net
(13) outlet is connected with the import of heat supply return water total valve (14) and the import of hold over system bypass valve (16) by the road respectively,
The outlet of heat supply return water total valve (14) is connected with the water inlet of heat-accumulator tank (6) lower part by the road, the water outlet of heat-accumulator tank (6) lower part
Mouthful be connected by the road with the import of heat-accumulator tank outlet valve (15), heat-accumulator tank outlet valve (15) by the road respectively with hold over system
The outlet of bypass valve (16), the import of heat exchangers for district heating imported valve (17) and heat exchangers for district heating bypass valve (18) import
It is connected, the outlet of heat exchangers for district heating imported valve (17) is connected with the healed water entrance of heat exchangers for district heating (5), heat exchangers for district heating
(5) healed water outlet is connected with the import of heat exchangers for district heating outlet valve (19), heat exchangers for district heating outlet valve (19)
Outlet is connected with the outlet of heat exchangers for district heating bypass valve (18) and the import of heat supply water supply total valve (20) respectively, and heat supply is supplied water
The water outlet that the outlet of total valve (20) is supplied water as heat supply network, condensate outlet and heat supply network drainage pump (21) of heat exchangers for district heating (5)
Import be connected, the outlet water outlet hydrophobic as heat supply network of heat supply network drainage pump (21).
2. the thermal power plant unit operating system according to claim 1 for improving safety, which is characterized in that first steam extraction
The first temperature-decreased pressure reducer (7) are provided on the first extraction line between valve (9) and the steam inlet on heat-accumulator tank (6) top.
3. the thermal power plant unit operating system according to claim 1 for improving safety, which is characterized in that second steam extraction
The second temperature-decreased pressure reducer (8) are provided on the second extraction line between valve (10) and the steam inlet on heat-accumulator tank (6) top.
4. the thermal power plant unit operating system according to claim 1 for improving safety, which is characterized in that the heat-accumulator tank
For constant pressure storing heating tank, accumulation of heat working medium is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821129568.3U CN208458053U (en) | 2018-07-17 | 2018-07-17 | A kind of thermal power plant unit operating system improving safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821129568.3U CN208458053U (en) | 2018-07-17 | 2018-07-17 | A kind of thermal power plant unit operating system improving safety |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208458053U true CN208458053U (en) | 2019-02-01 |
Family
ID=65180812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821129568.3U Expired - Fee Related CN208458053U (en) | 2018-07-17 | 2018-07-17 | A kind of thermal power plant unit operating system improving safety |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208458053U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631112A (en) * | 2019-09-11 | 2019-12-31 | 上海发电设备成套设计研究院有限责任公司 | Steam energy storage peak shaving system and method for heat supply unit |
-
2018
- 2018-07-17 CN CN201821129568.3U patent/CN208458053U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631112A (en) * | 2019-09-11 | 2019-12-31 | 上海发电设备成套设计研究院有限责任公司 | Steam energy storage peak shaving system and method for heat supply unit |
| CN110631112B (en) * | 2019-09-11 | 2023-11-28 | 上海发电设备成套设计研究院有限责任公司 | Steam energy storage peak shaving system and method for heat supply unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108548168A (en) | A kind of thermal power plant's fused salt accumulation of heat peak regulation system heated using main steam | |
| CN208418894U (en) | A kind of molten salt energy-storage heating system of power plant's depth peak regulation and flexibility transformation | |
| CN100354504C (en) | Multi-grade using backheating drain residual heat generator of thermal power generator set | |
| CN106765455A (en) | A kind of energy-saving heat storage and heat supply system | |
| CN105697075A (en) | Extraction condensing heat supply system additionally provided with non-reheat medium-pressure steam turbine | |
| CN103017231A (en) | Heat supply network water circulating pump energy-saving driving system of thermal power plant | |
| CN106499455A (en) | Combined-cycle power plant's soda pop backheat and fuel heating integrated put forward effect system | |
| CN104481611A (en) | Dead steam waste heat recovery system based on large temperature difference heat exchange technology | |
| CN207813675U (en) | A kind of co-generation unit for carrying on the back heat supply for solidifying pumping | |
| CN107269331A (en) | Realize cascaded utilization of energy and participate in the heat supply steam bleeding system and method for depth peak regulation | |
| CN208871707U (en) | A kind of efficient heating system that multi-heat source is series-parallel | |
| CN112856363B (en) | System and method for improving heat supply steam parameters of deep peak shaving heat supply unit | |
| CN208519750U (en) | A kind of thermal power plant's fused salt accumulation of heat peak regulation system heated using main steam | |
| CN209263108U (en) | A kind of heat supply network draining system | |
| CN205536060U (en) | Low temperature waste heat utilization system of thermal power plant | |
| CN208458053U (en) | A kind of thermal power plant unit operating system improving safety | |
| CN208222561U (en) | A kind of heat supply network is hydrophobic with steam air heater UTILIZATION OF VESIDUAL HEAT IN energy conserving system | |
| CN206903700U (en) | Realize cascaded utilization of energy and participate in the heat supply steam bleeding system of depth peak regulation | |
| CN204612228U (en) | A kind of low temperature heat system | |
| CN106523052A (en) | Combined-cycle power plant steam water back-heating and waste heat comprehensive utilization efficiency-improving system | |
| CN212389398U (en) | Combined cold recirculation system of deaerator for improving steam supply capacity of boiler | |
| CN109798573A (en) | A kind of multicomputer step heating system based on increasing steam turbine | |
| CN105570861A (en) | Energy cascade utilization device and method for extraction steam heating system | |
| CN111485961B (en) | Gas-steam combined cycle thermodynamic system with steam extraction and backheating functions | |
| CN206092088U (en) | Matching unit of coal -fired power unit heat supply parameter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190201 Termination date: 20190717 |