CN202216237U - Improved structure of direct current furnace without furnace water circulation pump - Google Patents
Improved structure of direct current furnace without furnace water circulation pump Download PDFInfo
- Publication number
- CN202216237U CN202216237U CN2011200948364U CN201120094836U CN202216237U CN 202216237 U CN202216237 U CN 202216237U CN 2011200948364 U CN2011200948364 U CN 2011200948364U CN 201120094836 U CN201120094836 U CN 201120094836U CN 202216237 U CN202216237 U CN 202216237U
- Authority
- CN
- China
- Prior art keywords
- drainage pump
- valve
- furnace
- direct current
- oxygen
- 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
Images
Abstract
The utility model relates to an improved structure of a direct current furnace without a furnace water circulation pump, which comprises a deaerator and a starting drainage pump and is characterized in that a communication pipe (5) is connected between the deaerator and a pipeline at the output end of the starting drainage pump, a stop valve (2) and a check valve (3) are connected in series on the communication pipe (5), the stop valve (2) is arranged at the side near the starting drainage pump, and the check valve (3) is arranged at the side near the deaerator. Through the structural improvement, the boiler cold-state starting time can be shortened, the vacuum state of a machine set can not be influenced, water resources are saved, the cost is reduced, and the improved structure of the direct current furnace without the furnace water circulation pump can bring economic benefits for the long-time operation of the machine set.
Description
Technical field
The utility model relates to a kind of improvement structure of supercritical once-through boiler pipe-line system, particularly not with the improvement structure of boiler water circulating pump direct current stove.
Background technology
At present, supercritical once-through boiler has become the main force of China's fired power generating unit, and project in construction is more relatively.Because direct current cooker does not have natural convection loop when starting, so the sole mode of water wall of monotube boiler cooling is to begin igniting just constantly to boiler feed water from boiler, and keeps certain working medium flow, to guarantee the good cooling of heating surface.In the water screen tube enough weight flow velocitys are arranged for the working medium and the heat that reclaim start-up course and when guaranteeing underrun; Direct current cooker need be provided with special start-up system, washes and unit underrun state recover working medium and heat at boiler thermal-state with convenient.Along with the restriction of national energy-saving and emission-reduction policy and electricity, coal price lattice, each electricity power group takes up newly-built machine set system is optimized, and in building unit, begins to occur not being with the start-up system of stove water pump.Because direct current stove start-up system is not with the characteristics of boiler water circulating pump; Add the restriction of chemical water-making ability and the restriction of steam exhaust device vacuum; Make that the hot flushing of boiler can not continuous disposable completion, need blowing out system water, treat moisture storage capacity meet the demands after igniting again.This has not only prolonged the time of unit cold start, and consumes a large amount of demineralized waters, has a strong impact on the economy of unit.For the newly-built unit that is in the debug phase, the duration will seriously lag behind.
The start-up system of this boiler is formed by starting separator, water tank, water tank level control valve etc.The water that separator separates goes out gets into water tank through the tube connector of separator below; Water in the water tank is drawn by the outlet connecting pipe of bottom; Get into condensation water tank through the water tank level control valve; Two drainage pumps are arranged in condensation water tank outlet, boiler clean and igniting a large amount of stove water of starting stage be exhausted from system outside or be recycled in the exhaust apparatus.
Because be not with boiler circulation pump in this start-up system, this has just determined the power of keeping boiler water wall minimum flow characteristic must rely on feedwater flow to realize.
Summary of the invention
The utility model is exactly to provide a kind of and shorten boiler cold-state start-up time for overcoming deficiency that above-mentioned prior art exists, can not exert an influence, the conserve water resource, reduce cost the vacuum of unit, can bring the long-time running of unit economic benefit not with the improvement structure of boiler water circulating pump direct current stove.
The technical solution of the utility model is:
Between oxygen-eliminating device and the pipeline that starts the drainage pump output, be connected a connecting pipe, on communicating pipe, be in series with stop valve and non-return valve.
The further technical solution of the utility model is:
Said stop valve is installed near the pipe side that starts the drainage pump output, and non-return valve is installed near the oxygen-eliminating device side.
Be directed to these characteristics of this type boiler, the boiler startup draining system is transformed, return at condensation water tank and draw one the tunnel on the exhaust apparatus pipeline directly towards oxygen-eliminating device, the advantage of transforming like this is:
(1) practices thrift demineralized water, reduced thermal loss.Under the qualified situation of water quality, discharge water can be recycled as soon as possible, also reduces at water-saving while thermal loss, and the speed of improved boiler heating, boosting has shortened the time that boiler cold-state starts, and economizes on resources, reduces cost;
(2) startup of HTHP is hydrophobic need not to drain into steam exhaust device, has not only practiced thrift steam exhaust device dewatering capacity-enlarging device spray water flux, the more important thing is that the vacuum to unit can not exert an influence;
(3) for the unit that is in the debug phase, the design can shorten the boiler blow piping duration.In the boiler step-down blowpipe starting stage, adopting former design to be elevated to the required pressure of blowpipe probably needs 3～4 hours, under the constant prerequisite of quantity combusted, shortens to about 2～3 minutes through the blowpipe time after transforming.
Fact proved that such transformation is very useful to the operation and the adjustment of whole boiler and even whole unit.Steam turbine during the car with generator connecting in parallel with system band initial load during, effectively practiced thrift the unit water consumption and shortened towards the car time.Repeatedly blowing out, shutdown situation can occur for a large-scale steam power plant, the unit starting that is increased in repetition of this pipeline all will be practiced thrift with the band initial load stage and start and operating cost considerable economic benefit.
Description of drawings
Accompanying drawing is the structural representation of the utility model.
The specific embodiment
Referring to accompanying drawing, is connected a connecting pipe 5 following of the constant situation of unit primary tube line structure between oxygen-eliminating device and the pipeline that starts the drainage pump output, on communicating pipe 5, be in series with stop valve 2 and non-return valve 3.Said stop valve 2 is installed near starting hydrophobic pump side, and non-return valve 3 is installed near the oxygen-eliminating device side.
The effect of valve 1 mainly is to isolate when closing to cut off to start that the water of pipeline drains into steam exhaust device behind the drainage pump; The effect that valve 1 is opened is that the water of conducting startup drainage pump drains into steam exhaust device.When valve 2 was open mode when the utility model operate as normal, valve 1 was closed; When valve 2 was closed, valve 1 need be opened.
The effect of valve 2 mainly is cut off to isolate to start when closing that the water of pipeline gets into oxygen-eliminating device behind the drainage pump, has also prevented that the water of oxygen-eliminating device from pouring in down a chimney to starting drainage pump and condensation water tank simultaneously; The effect that valve 2 is opened be conducting start drainage pump water to oxygen-eliminating device.Valve 2 is to connect the important operation valve that starts pipeline between drainage pump and the oxygen-eliminating device.
The effect of non-return valve 3 mainly is to prevent that the aqueous reflux of oxygen-eliminating device is to starting drainage pump and condensation water tank; Non-return valve 3 has unidirectional conducting effect; Make the water that starts drainage pump arrive oxygen-eliminating device smoothly through the pipeline that starts drainage pump to oxygen-eliminating device; And before non-return valve 3 back pressure are higher than non-return valve 3 during pressure, reverse stop valve is closed for 3 this moments automatically, and the aqueous reflux that stops oxygen-eliminating device is to starting drainage pump and condensation water tank.
The effect of valve 4 mainly is when boiler water quality is defective, through opening this valve the water of condensation water tank to be drained into trench through starting outside the drainage pump; When the water of condensation water tank need not efflux is the utility model valve-off 4 when devoting oneself to work, and has cut off the water that starts behind the drainage pump and has drained into trench outward.
The effect of communicating pipe 5 is after boiler water quality is qualified, need not efflux in the time of can not getting into steam exhaust device, can utilize it to reclaim working medium.
Total head is 0.52MPa behind the startup drainage pump; The mother who starts the drainage pump output manage to the oxygen-eliminating device height be 23 meters; After oxygen-eliminating device pressure rises to 0.29MPa, close stop valve 2 and stop this road circulation, for the sake of security, after oxygen-eliminating device pressure rises to 0.25MPa, stop circulation through closing stop valve 2.
Ignition of the boiler and initial start stage, oxygen-eliminating device are in do not have to press or low pressure (oxygen-eliminating device pressure is less than 0.25MPa) running status, and this moment, this system capable of using circulated, a large amount of reductions thermal loss and demineralized water resource.
Operating process:
Ignition of the boiler and initial start stage; Oxygen-eliminating device is in not have presses or low pressure (oxygen-eliminating device pressure is less than 0.25MPa) running status, after boiler water quality is qualified, need not efflux in the time of can not getting into exhaust apparatus, and affirmation valve 1, valve 2, valve 4 are all closed; The condensation water tank water level is in normal range (NR); Start a startup drainage pump, after startup drainage pump startup punching press finishes, progressively open hand stop valve 2, progressively adjust startup drainage pump outlet pressure through hand stop valve 2 and maintain about 0.4MPa; Start drainage pump this moment can provide thermal source and feedwater to oxygen-eliminating device through communicating pipe 5, realizes that working medium reclaims.
After oxygen-eliminating device pressure rises to 0.29MPa, close stop valve 2 and stop to start drainage pump, for the sake of security, after oxygen-eliminating device pressure rises to 0.25MPa, stop circulation through closing stop valve 2 to this road circulation of oxygen-eliminating device communicating pipes 5.
Claims (2)
1. one kind with the improvement structure of boiler water circulating pump direct current stove; Comprise oxygen-eliminating device and start drainage pump; It is characterized in that between oxygen-eliminating device and the pipeline that starts the drainage pump output, being connected a connecting pipe (5), on communicating pipe (5), be in series with stop valve (2) and non-return valve (3).
2. according to claim 1 not with the improvement structure of boiler water circulating pump direct current stove, it is characterized in that said stop valve (2) near the pipe side installation that starts the drainage pump output, and non-return valve (3) is installed near the oxygen-eliminating device side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200948364U CN202216237U (en) | 2011-04-01 | 2011-04-01 | Improved structure of direct current furnace without furnace water circulation pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200948364U CN202216237U (en) | 2011-04-01 | 2011-04-01 | Improved structure of direct current furnace without furnace water circulation pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202216237U true CN202216237U (en) | 2012-05-09 |
Family
ID=46015489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200948364U Expired - Fee Related CN202216237U (en) | 2011-04-01 | 2011-04-01 | Improved structure of direct current furnace without furnace water circulation pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202216237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402714A (en) * | 2015-12-23 | 2016-03-16 | 哈尔滨锅炉厂有限责任公司 | Pump-free starting system of supercritical once-through boiler and starting method |
-
2011
- 2011-04-01 CN CN2011200948364U patent/CN202216237U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402714A (en) * | 2015-12-23 | 2016-03-16 | 哈尔滨锅炉厂有限责任公司 | Pump-free starting system of supercritical once-through boiler and starting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104713074B (en) | A kind of direct current cooker starts the hydrophobic System and method for utilizing pressure flash vessel to reclaim | |
| CN103436271A (en) | System for recycling raw gas afterheat of coke oven | |
| CN210197332U (en) | Cascade utilization deep coupling system for smoke, wind and sewage waste heat of coal-fired boiler | |
| CN102213438A (en) | Smoke exhaust system for realizing energy conservation by using coal-fired boiler flue-gas waste heat recovery and water conservation by using wet desulphurization | |
| CN205261619U (en) | A fan heater drainage system for overcritical and ultra supercritical unit | |
| CN203530217U (en) | Raw coke oven gas waste heat recycling system | |
| CN208967776U (en) | A kind of supercritical once-through boiler pipe-line system | |
| CN201436467U (en) | Natural circulation structure of dry quenched coke boiler economizer | |
| CN105042892B (en) | Hot water system combined with slot type solar thermal collector | |
| CN201779851U (en) | Heat pump warming machine for recovering waste heat of hot spring waste water | |
| CN104132541A (en) | Smoke afterheat recovery and gradient utilization system | |
| CN105627292B (en) | A kind of stove water stove machine loop heating system and its heating means | |
| CN202216237U (en) | Improved structure of direct current furnace without furnace water circulation pump | |
| CN205503389U (en) | Colliery pressure fan, pit water energy recovery utilize system | |
| CN104848327A (en) | Geothermal water combined water source heat pump heating circulation system | |
| CN106765023A (en) | It is a kind of new super（It is super）Boilers activation system | |
| CN203614179U (en) | Gas electrical generation waste heat recovery device | |
| CN207570387U (en) | It is a kind of to utilize the heat accumulation peak regulation system that feeds water | |
| CN201547954U (en) | Instant heating type energy-saving heat pump hot water device suitable for public bathrooms | |
| CN203756246U (en) | Novel auxiliary machine cooling water system used for indirect air cooling unit | |
| CN103790657A (en) | Steam distributing method and device for waste heat generating system of charcoal ink factory | |
| CN205619248U (en) | Stove water stove machine circulation heating system | |
| CN102581945A (en) | Exhaust steam afterheat recycling device for aerated brick field | |
| CN208846403U (en) | Adjacent machine auxiliary steam based on furnace water circulation starts heating system | |
| CN202791977U (en) | DC (direct current) coal-fired generating unit starting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180725 Address after: 710065 No. 1 building, No. 12, Qin Tang, No. 187, science and technology four road, hi tech Zone, Xi'an, Shaanxi Patentee after: North China Electric Power Research Institute Co., Ltd. Xi'an branch Address before: 710065 No. 1, 12 building, Qin Tang four, No. four science and technology road, Xi'an, Shaanxi. Patentee before: North China Electrical Power Research Institute (Xi'an) Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20200401 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |